31st week of 2015 patent applcation highlights part 63 |
Patent application number | Title | Published |
20150214783 | System And Method For Detecting And Correcting DC Bus Imbalances Between Parallel Coupled UPS Systems Sharing A Common Battery - The present disclosure relates to method for use with a system having first and second uninterruptible power supplies (UPS 1 and UPS 2), and where the two UPSs are connected across a DC+ and a DC− terminal of a common battery, and where a neutral imbalance between neutral lines of the two UPSs has been corrected, giving rise to a current flow from a DC− bus of one of the UPSs to a DC− bus of the other one of the UPSs. The method corrects for a nominal DC reference voltage for one of the UPSs to eliminate the current flow to the DC− bus of the other UPS. | 2015-07-30 |
20150214784 | SYSTEMS AND METHODS FOR UNINTERRUPTIBLE POWER SUPPLIES WITH BIDIRECTIONAL POWER CONVERTERS - Electrical power systems and methods using bidirectional power converters to provide, among other functions, uninterruptible power supplies for loads such as cell towers. The power-packet-switching power converter can be connected, for example, to a photovoltaic array, batteries, and a critical load such as a cell tower. An AC generator can also be connected in order to power the cell tower and/or to charge the batteries as needed. Green energy utilization is maximized, power conversion efficiency is increased, and system costs are decreased, by having only a single power conversion stage for all conversions. | 2015-07-30 |
20150214785 | EMERGENCY LIGHTING DEVICE - The invention relates to an emergency lighting device for controlling a lighting means, comprising an energy store, such as a battery or an accumulator, a charging circuit for the energy store having connections for an AC voltage (alternating voltage), wherein the charging circuit has a potential isolation element, a potentially isolated clocked converter supplied from the energy store and having a switch, preferably a flyback converter, wherein the converter preferably can be supplied only by the energy store, a control circuit for controlling the switch, and a supply path from the secondary side of the converter to connections for the lighting means. | 2015-07-30 |
20150214786 | Automatic power level trimming via broadcast medium - The present invention relates to a method and apparatus for controlling power distribution by a control system that only requires a broadcast medium between a controller ( | 2015-07-30 |
20150214787 | AC MOTOR DRIVE POWERED CONCURRENTLY BY AC GRID AND DC SOLAR ARRAY - A system and method uses solar generated DC electricity to power an AC component in parallel with an AC grid via a variable frequency motor drive (VFD). During operation of the DC solar array a DC grid voltage is adjusted via a signal to a first rectifier to maintain the DC grid voltage below a DC array voltage such that power for operation of the AC component is preferentially sourced from the DC solar array. The system and method maintain the use of renewable energy to augment or largely replace expensive grid connected energy. | 2015-07-30 |
20150214788 | WIRELESS POWER TRANSFER APPARATUS - A power sending loop coil disposed in a power sending device takes out electric energy from DC power and generates periodically-varying electromagnetic field resonance energy in a space. A power receiving loop coil disposed in a power receiving device takes out, as electric energy, the periodically-varying electromagnetic field resonance energy from the space and supplies electric power to a load. The power sending loop coil and the power receiving loop coil are coupled to each other through electromagnetic field resonant coupling, whereby electric power is wirelessly transferred from the power sending device to the power receiving device. | 2015-07-30 |
20150214789 | Electromechanical Transducer - A transducer contains a rotor, on which permanent magnets are arranged in a concentrically radiant manner, and two stators are provided at both sides of the rotor. The stators are produced from a soft-magnetic material. Each stator contains a first stator section with radially outer supporting bars for first magnetic active faces of the stator being opposite the rotor and a second stator section with radial inner supporting bars for second magnetic active faces of the stators being opposite the rotor. An annular winding groove for receiving a winding is provided between the stator sections. Supporting bars are each arranged in an annular manner and each extend parallel to the rotor axis in the direction of the rotor. The magnetic active faces of the stators are end faces of projections which are uniformly spaced to one another and which protrude from the supporting bars in the direction of the rotor. | 2015-07-30 |
20150214790 | DEVICE COMPRISING AN ELECTRIC MACHINE WITH A LIGHTWEIGHT DESIGN - The invention relates to a device comprising a base body (I). A stator pack ( | 2015-07-30 |
20150214791 | STATOR CORE AND SPINDLE MOTOR INCLUDING THE SAME - There are provided a stator core and a spindle motor including the same. The stator core includes a core back having a ring shape; a plurality of buffer members adhered to an outer peripheral surface of the core back; and a plurality of teeth parts including a winding part adhered to the plurality of buffer members to protrude in an outer diameter direction of the core back and having a coil wound therearound and a stopper preventing the coil from being separated. Therefore, the buffer member may perform a damping function between the core back and the teeth part, such that vibrations and noise generated at the time of operation of the spindle motor may be decreased. | 2015-07-30 |
20150214792 | SPINDLE MOTOR AND RECORDING DISK DRIVING DEVICE INCLUDING THE SAME - There is provided a spindle motor including: a base member including an installation portion; and a stator core fixed to the installation portion, wherein the installation portion has a facing surface disposed so as to face a lower surface of a coreback of the stator core, and at least one of the facing surface and the lower surface of the coreback has a protrusion part formed thereon. | 2015-07-30 |
20150214793 | DC Field Gradient Motor - A field gradient motor with a stator solenoid coil, a stator solenoid coil retained by a stator solenoid coil housing, a shaft rotatably retained in proximity to the stator solenoid coil, and a rotor retained relative to the shaft. The rotor comprises a plurality of iron disks retained by the shaft, and the stator solenoid coil, the plurality of iron disks, and the shaft cooperate to produce an axial closed toroidal B-field in a surrounding volume of air and an electromagnetic action of the motor. Radial notches with 45 degree equilateral triangular cross sections communicate radially on first and second faces of each disk. Where the notches are 360/N degrees wide, they can be 360/N degrees deep. | 2015-07-30 |
20150214794 | Rotor of an Alternator - The present invention relates to a rotor for an alternator, including a first claw pole element and an opposite second claw pole element and a plurality of N-pole claw-shaped bodies of the first claw pole element and a plurality of S-pole claw-shaped bodies of the second claw pole element being respectively adjacent to each other and spaced apart; wherein a permanent magnet is fixed between each of the N-pole claw-shaped bodies of the first claw pole element and each of the S-pole claw-shaped bodies of the second claw pole element which are adjacent to each other, to increase a magnetic field generated after the rotor is electromagnetically conducted and decrease magnetic leakage between the two pole elements, thereby increasing generating capacity of the alternator. | 2015-07-30 |
20150214795 | MAGNETIC POWER GENERATOR FOR HYBRID VEHICLE AND/OR ELECTRIC POWER PLANT - A magnetic generator may be disclosed. The magnetic generator may include one or more permanent magnets which may function in one or more ways in combination with a dielectric elastomer to efficiently produce electricity. Electricity may be produced directly by the magnets, through mechanical means as driven by the magnets, by piezoelectric means, or as desired to maintain peak efficiency. Further, systems to retain excess energy for later use, such as a flywheel or a battery may be employed. | 2015-07-30 |
20150214796 | MAGNET MODULE AND FAN WITH MAGNET MODULE - A magnet module is disclosed. The magnet module includes a sintered magnet structure, a magnetic permeable casing and a fixing member. The sintered magnet structure is disposed in the magnetic permeable casing. The fixing member has a plurality of locking units, and the sintered magnet structure and the magnetic permeable casing are fixed by the locking units of the fixing member. | 2015-07-30 |
20150214797 | THREE-DIMENSIONAL AXIAL GAP TYPE ROTATING ELECTRIC MACHINE - An axial gap type rotating electric machine including a stator that includes m salient poles that protrude from a discoid magnetic material in a rotating shaft direction and are arranged in a circumferential direction. A winding wire is wound around an outer periphery of each of the salient poles. The rotor includes n permanent magnet poles and n rotor magnetic materials that are alternately arranged in the circumferential direction. The permanent magnet poles each include a magnet pole piece and a permanent magnet that are fixedly attached to each other and arranged in an axial direction, the magnet pole piece being made of a magnetic material. A plurality of teeth are formed in a concentric arc-like manner in an opposing part between: the magnet pole pieces and the rotor magnetic materials; and the stator so as to engage with each other with the intermediation of the air gap. | 2015-07-30 |
20150214798 | PERMANENT MAGNET DYNAMOELECTRIC MACHINE - A permanent magnet dynamoelectric machine of surface magnet type is configured to have a flanged U-shaped magnet presser made of a conductive metal, and to fix the magnet presser to a rotor core using a fixing member so as to fix a part of an outer periphery of a permanent magnet in a radial direction with a flange of the magnet presser. This ensures the permanent magnet dynamoelectric machine of surface magnet type to be adaptable to large-torque, high-speed and large-capacity. | 2015-07-30 |
20150214799 | LARGE-DIAMETER ROTARY ELECTRIC MACHINE ROTOR, AND ROTARY ELECTRIC MACHINE - A rotor of a wind turbine large-diameter rotary electric machine has a hub configured to rotate about an axis of rotation; a tubular structure extending about the hub and supporting a plurality of active segments arranged about the axis of rotation; and a radial structure configured to connect the hub to the tubular structure, which is divided into a plurality of sectors connectable selectively to the radial structure. | 2015-07-30 |
20150214800 | SELF-SECURING BRAZING PREFORM CLIP - A method of assembling a stator includes forming a plurality of cleats into a brazing tape, forming a U-shaped clip using the stamped brazing tape, and attaching the U-shaped clip to a stator conductor, where the attached U-shaped clip is self-secured to the conductor by the cleats. Apparatus for connecting a stator conductor pair includes a brazing clip shaped to conform to and fit over one of the conductors and having generally a U-shape with two sides each including at least one cleat configured to engage the one conductor and secure the respective side thereto. A system for brazing together adjacent pairs of conductors includes a self-securing, three-sided brazing clip having a plurality of cleats formed therein, a comb having a plurality of receptacles structured for retaining respective stator conductors, and electrodes radially aligned with one adjacent pair, where compression of the electrodes sandwiches the brazing clip therebetween. | 2015-07-30 |
20150214801 | AXIAL-FLOW ELECTRIC MOTOR - A 2p poles axial-flow electric motor includes a stator composed of at least one pair of conductor layers on which the printed phases are arranged in semi-phases. | 2015-07-30 |
20150214802 | BRUSHLESS DIRECT CURRENT MOTOR AND CLEANER USING THE SAME - A cleaner includes a BLDC motor and a power unit. The BLDC motor includes a rotor and a stator provided with a DC coil and an AC coil in a separate manner. The power unit is configured to supply DC power and AC power to the DC coil and the AC coil, respectively. | 2015-07-30 |
20150214803 | MOTOR STATOR, METHOD FOR PREPARING THE MOTOR STATOR AND MOTOR COMPRISING THE MOTOR STATOR - A motor stator includes a stator core, first and second insulating members and a stator winding. The stator core defines upper and lower ends and has a central through hole and a plurality of stator slots distributed along a circumferential direction of the stator core, and each stator slot includes first and second slot segments. The first insulating member is disposed in the stator slot. The second insulating member is disposed at at least one of the upper and lower ends of the stator core, and defines a central hole and a plurality of grooves corresponding to the plurality of stator slots respectively. A flange is formed on the second insulating member along a peripheral of the groove and fitted within the second slot segment. The stator winding is wound on the stator core and passing through the plurality of stator slots and grooves. | 2015-07-30 |
20150214804 | STATOR OF ROTARY ELECTRIC MACHINE - In a concentrated winding stator, which has a separated iron core structure, of a rotary electric machine, a length of ear portions | 2015-07-30 |
20150214805 | ELECTRIC COMPRESSOR - An electric compressor includes a hermetic container | 2015-07-30 |
20150214806 | Actuator Overspeed Guard - A location and retention component is provided for positively locating an overspeed guard and retaining a centrifugal actuator at an optimum positional relationship relative to each other. The system includes a first and second retention element removably engagable to the output shaft of a motor and axially fixable to the shaft at corresponding locations to maintain the optimum positional relationship. The first retention element serves as a positive stop for assembling the overspeed guard on the motor shaft, while the second retention element ensures that the centrifugal actuator is properly placed within the overspeed guard. | 2015-07-30 |
20150214807 | MOTOR WITH HALL SENSOR COVER AND WATERPROOF COVER - In a motor according to the present invention configured of a stator core having a plurality of teeth formed in a radial shape and an upper insulator and a lower insulator surrounding an upper portion and a lower portion of the stator core, the motor includes a hall sensor cover combined on a top of the teeth of the upper insulator and having a plurality of hall sensors, and a hall sensor resting unit for resting lower end portions of the hall sensors is formed on a top of one end portions of the teeth of the upper insulator. | 2015-07-30 |
20150214808 | SPINDLE MOTOR AND HARD DISK DRIVE INCLUDING THE SAME - There are provided a spindle motor and a hard disk drive including the same. The spindle motor includes: a sleeve supporting a shaft and forming a bearing clearance between the sleeve and the shaft; a housing provided on an outer peripheral surface of the sleeve and forming a circulation hole between the housing and the sleeve; and a rotor hub attached to an upper end portion of the shaft and including an extension wall part extended downwardly and forming a liquid-vapor interface between the extension wall part and the housing, wherein a connection part is formed between the sleeve and the housing and the circulation hole to communicate with each other, and the extension wall part includes a protrusion part protruding in an inner diameter direction corresponding to a direction toward the connection part at a portion of the connection part in communication with the sealing part. | 2015-07-30 |
20150214809 | Motor with Thrust Bearing - A motor includes: a base having a bearing sleeve, with the bearing sleeve having an opening end and a sealing end, with the opening and sealing ends opposite to each other; a stator coupled with the base; a rotating member rotatably received in and coupled with the bearing sleeve, with the rotating member comprising a shaft and a limiting portion, wherein a first end of the shaft connects with the limiting portion, a second end of the shaft has a coupling portion; a thrust bearing arranged between the shaft and an inner surface of the bearing sleeve, so that the limiting portion is between the thrust bearing and the sealing end; a pressing member coupled with the bearing sleeve and received therein for positioning the thrust bearing; and a hub coupled with the coupling portion of the shaft and having a permanent magnet corresponding to the stator. | 2015-07-30 |
20150214810 | COOLING JACKET - A cooling jacket for cooling using a fluid includes an inner part, an outer jacket that extends in an axial direction and surrounds the inner part in a cross-sectional plane perpendicular to the axial direction, and a duct for holding the fluid. A first boundary of the duct an outer surface of the inner part, while a second boundary of the duct (includes an inner surface of the outer jacket. The inner part is arranged inside the outer jacket, and a material property of the outer jacket is different from the material property of the inner part. | 2015-07-30 |
20150214811 | BRUSHLESS DC MOTOR - A electrically insulating member, which covers a stator core, has a plurality of engagement claws, which extend in the axial direction of a rotary shaft, and a plurality of positioning projections, at positions in the circumferential direction differing from those of the engagement claws, which extend further than the engagement claws. A sensor board, on which a plurality of magnetic sensors are fixed in place, has engagement parts, which engage with the engagement claws, and positioning recesses, into which the positioning projections are inserted. | 2015-07-30 |
20150214812 | CONNECTOR PROTECTION STRUCTURE FOR MOTOR - A connector protection structure of motor includes a motor case that houses the motor, a connector that is placed on an outer surface of the motor case, and a protection member that is provided between the connector and a side member (LSM) of a vehicle, and that is fixed on the motor case. The protection member includes a protection section that is provided in a projected arrangement around the connector, a fixing section that is linked to the protection section and that is fixed by a bolt on a rear surface of the motor case, and a support section that is linked to the fixing section, that includes a through hole through which a stud, provided in a projected arrangement on a side surface of the motor case, penetrates, and that is supported on the side surface by the stud. | 2015-07-30 |
20150214813 | INTEGRATED EBIKE MOTOR AND BATTERY ASSEMBLY - One variation may include a product comprising: an integrated electric bicycle motor comprising: an inrunner ring motor, a rotor mount coupled to the inside of the inrunner ring motor, and at least one battery assembly coupled to the rotor mount. | 2015-07-30 |
20150214814 | SPINDLE MOTOR AND HARD DISK DRIVE INCLUDING THE SAME - There are provided a spindle motor and a hard disk drive including the same. The spindle motor includes: a lower thrust member fixedly attached to a base member; a shaft having a lower end portion coupled to the lower thrust member and an upper end portion provided with a flange part; a rotating member including a sleeve rotatably provided based on the shaft and a rotor hub extended from the sleeve in an outer radial direction; and a sealing member provided at an end portion of the flange part, extended in a downward axial direction so as to enclose an outer portion of an upper end of the sleeve, and forming a liquid-vapor interface between the sealing member and the sleeve, wherein the sealing member has a first inclined surface inclined in an inner radial direction and downwardly in the axial direction. | 2015-07-30 |
20150214815 | ENERGY-ACCUMULATION APPARATUS - An energy-accumulation apparatus includes a variable-buoyancy assembly configured to be selectively buoyant in a body of water. The energy-accumulation apparatus also includes a delivery assembly coupled to the variable-buoyancy assembly. The delivery assembly is configured to deliver the variable-buoyancy assembly within the body of water between a first position to a second position. | 2015-07-30 |
20150214816 | GEAR-DRIVEN GENERATOR WITH OFFSET AXIS OF ROTATION AND INTEGRATED COOLING SYSTEM - An electrical generator and drive shaft assembly are disclosed. The electrical generator may include a step-up gearbox to minimize the required volume and weight of the generator for onboard aircraft electricity generation. The electrical generator and drive shaft interface may be axially offset. The electrical generator may also include a self-contained fluid cooling and lubrication system that may employ on-board fuel to absorb generated heat and/or oil to lubricate and cool generator components. | 2015-07-30 |
20150214817 | MOTOR HAVING COOLING FUNCTION - One aspect of the invention provides a motor comprising a housing; a rotating shaft disposed in the housing and supported by the housing; a stator disposed in the housing; a rotor configured to rotate with respect to the stator and integrally fastened with a rotating shaft; and an impeller mounted over an outer wall of the rotating shaft and comprising at least one wing, wherein the rotating shaft is formed of a hollow shaft so as to contain oil therein, the rotating shaft comprising at least a through hole radially extending toward the impeller such that the oil contained in the rotating shaft can be discharged through the through hole and scattered by the at least one wing. | 2015-07-30 |
20150214818 | Brush Assembly Mount - An electric motor is provided including a stator assembly having a stator body and magnets attached to an inner surface of the stator body via an adhesive, and an armature rotatably received within the stator assembly and having an armature shaft on which a commutator is mounted. A brush assembly is provided including a brush card mount disposed around the commutator and a mating housing longitudinally extending from the brush card mount. The mating housing includes a cylindrical wall and a mating surface formed substantially perpendicularly to an inner surface of the cylindrical wall and arranged to mate with an end surface of the stator body. The mating surface of the mating housing includes posts longitudinally extending along the inner surface of the cylindrical wall and recessed surfaces formed therebetween, the posts being mounted on the end surface of the stator body. | 2015-07-30 |
20150214819 | HIGH ALTITUDE, HIGH VOLTAGE REAR TERMINAL BLOCK ASSEMBLY - A disclosed terminal block assembly for a generator includes a terminal block with a base with first and second transverse terminal surfaces adjoining one another. One of the terminal surfaces includes an increased width greater than a length of a cable terminal lug for providing a lightning strike and creepage barrier. The terminal surfaces include spaced apart protrusions extending from the first and second surfaces to provide spaced apart terminal areas overlapping the first and second surfaces. First and second terminal studs are disposed within each corresponding first and second terminal areas and are electrically connected by a bus bar. | 2015-07-30 |
20150214820 | HAIRPIN JOINT - A method of forming a stator winding includes providing a stator core having a plurality of longitudinally extending slots formed about a circumference thereof, providing a plurality of hairpin conductors each having a substantially rectangular cross-section and each having an apex portion and a pair of legs that terminate at respective ends, cutting a bevel at each leg end, inserting the hairpin legs into respective ones of the slots so that the leg ends extend from an axial end of the stator core, bending the hairpin legs to form a plurality of adjacent pairs of leg ends with beveled cuts facing one another, compressing the beveled cuts of each pair together, and resistance welding the pairs to form a plurality of welded joints. | 2015-07-30 |
20150214821 | Active Control System for a Variable Electromotive-Force Generator with Applications to Wind Turbines, Ships, and Hybrid Vehicles - This invention relates to an active control system for a variable electromotive-force generator (VEG) for use in wind turbines, ships, hybrid vehicles, and related applications. | 2015-07-30 |
20150214822 | LINEAR VIBRATION MOTOR - Embodiments of the invention provide a linear vibration motor including a stator part including a magnet, a vibrator part including a coil positioned to face the magnet and a printed circuit board coupled to the coil and accommodated in an internal space of the stator part, and an elastic member connecting the stator part and the vibrator part to each other. According to at least one embodiment, the printed circuit board has one end coupled to the stator part and the other end coupled to the vibrator part and at least partially covers the coil facing the stator part. | 2015-07-30 |
20150214823 | KINETIC ENERGY HARVESTING METHODS AND APPARATUS - A system, method, and apparatus for kinetic energy harvesting are disclosed. An example kinetic energy harvesting apparatus includes a tubular-shaped magnet housing, a first end-cap magnet configured to connect to a first end of the magnet housing and a second end-cap magnet configured to connect to a second end of the magnet housing. The apparatus also includes a first wire coil configured to be connected to the magnet housing between the first end and a center of the magnet housing and a second wire coil configured to be connected to the magnet housing between the second end and the center of the magnet housing. The apparatus further includes a central magnet configured to be located within the magnet housing between the first end and the second end such that the central magnet is suspended within the magnet housing. | 2015-07-30 |
20150214824 | ELECTROMAGNETIC TURBINE - A generator including a first magnetic assembly and a second magnetic assembly wherein the first and second magnetic assemblies are arranged in parallel for the production of a magnetic field and a null magnetic field region, a rotor positioned between the first and second magnetic assemblies the rotor being coupled to a drive shaft extending through the first and second magnetic assemblies wherein a portion of the rotor is positioned in the null field region, a least one current transfer mechanism coupled to the rotor in the null field region and at least one current transfer mechanism coupled to the shaft, a drive mechanism attached to the shaft, whereby actuation of the drive mechanism causes rotation of the rotor in the magnetic field to produce a electric potential between the first and second current transfer mechanisms. | 2015-07-30 |
20150214825 | PSEUDO-CONSTANT FREQUENCY CONTROL FOR VOLTAGE CONVERTER - A pseudo-constant portion of a switching cycle (ON time or OFF time) is constant over short periods of time but the pseudo-constant portion is controlled over longer periods of time in a slow frequency control loop to maintain a desired frequency. The average frequency is maintained at or near a desired frequency but when there is a transient, local disturbance, or load change, or other occurrence, then for a short period of time the frequency will vary as the non pseudo-constant portion of the switching cycle changes to address the transient or other occurrence. The frequency control loop will slowly adjust the pseudo-constant portion of the switching cycle to return to the desired frequency. | 2015-07-30 |
20150214826 | SOFT-START FOR ISOLATED POWER CONVERTER - Current flowing through an inductor on a primary side of a voltage converter is sensed and compared to a threshold peak current value to determine when to end an ON portion of the voltage converter. The secondary side of the voltage converter supplies an indication of output voltage for use in determining the threshold peak current value. On start-up the primary side detects when the indication of output voltage is supplied by the secondary side across on isolation channel. Prior to detecting the indicating is being supplied, the primary side uses an increasing threshold peak current as the threshold peak current value. After detection that the indication of output voltage is being provided by the secondary side, the threshold peak current value is based on the indication of the output voltage. | 2015-07-30 |
20150214827 | VOLTAGE CONVERTER AND POWER MANAGEMENT DEVICE INCLUDING THE SAME - A voltage converter includes a driving device unit, a current sensing unit and a switching control circuit. The driving device unit charges an input power supply voltage in an inductor, connected between a switching node and an output node, in response to a first driving control signal, and discharges the inductor in response to a second driving control signal. The current sensing unit generates first and second sensing signals based on a first sensed current, a second sensed current, a voltage at the switching node and a ground voltage. The switching control circuit generates the first and second driving control signals by performing a pulse-frequency modulation (PFM) and a pulse-width modulation (PWM) based on a feedback voltage, a reference voltage and the first and second sensing signals. The switching control circuit adaptively adjusts off-time when the switching control circuit performs the PFM. | 2015-07-30 |
20150214828 | NESTABLE SINGLE CELL STRUCTURE FOR USE IN A POWER CONVERSION SYSTEM - Provided is an apparatus, including a capacitor module having a plurality of connecting terminals and a plurality of switch elements. Each switch element has at least one switch terminal coupled to a corresponding connecting terminal, wherein the switch elements are configured for mutually exclusive operation via a control device. | 2015-07-30 |
20150214829 | ZERO-CROSSING DETECTION CIRCUIT - In one embodiment, a zero-crossing detection circuit can include: (i) a first detection circuit configured to detect a current through a main transistor of a main circuit of a switching power supply, and to generate a voltage sense signal that represents the current through the main transistor; (ii) a second detection circuit configured to detect if quasi-resonance occurs in the main circuit, the second detection circuit being configured to generate at least one pulse signal when the quasi-resonance is detected; and (iii) a control circuit configured to receive the at least one pulse signal and the voltage sense signal, to turn the main transistor off when the current through the main transistor reaches a predetermined value, and to turn the main transistor on when the at least one pulse signal is active. | 2015-07-30 |
20150214830 | SYSTEM AND METHOD OF POWER CONVERSION - Systems and methods for power conversion are disclosed. The systems and methods use generation of a plurality of power levels approximately equal to multiples of one or more power supply voltage levels along with generation of one or more intermediate power levels between levels of the plurality of power levels via spanning reactor inductors. Furthermore, the method includes generating an output signal using the generated plurality of power levels and the one or more intermediate levels. | 2015-07-30 |
20150214831 | INVERTER AND CONTROL METHOD THEREOF - The present invention discloses an inverter and a control method thereof. The inverter includes a first bridge leg having a series of first switch, second switch, third switch, fourth switch and fifth switch, and a second first bridge leg having a series of sixth switch, seventh switch, eighth switch, ninth switch, tenth switch. The control method includes steps of synchronously turning on or off the first switch, second switch, ninth switch and tenth switch, controlling that an on/off state of the third switch or eighth switch is complementary to an on/off state of the first switch, second switch, ninth switch and tenth switch, and synchronously turning on or off the fourth switch, fifth switch, sixth switch and seventh switch. | 2015-07-30 |
20150214832 | Three-Phase Inverter with a Repositioned Choke - A method and apparatus for converting direct current into alternating current. The direct current is converted into a number of alternating currents using a switch system. The number of alternating currents is filtered using a set of inductors and a set of capacitors. Higher-frequency electromagnetic interference is blocked using a choke located between the set of inductors and the set of capacitors. | 2015-07-30 |
20150214833 | SYSTEM AND METHOD OF COMPENSATING POWER FACTOR FOR ELECTRICAL LOADS - A power factor controller (PFC) for an electrical load such as LED lighting includes a power factor correcting converter for generating a sinusoidal input current. The PFC further includes a programmable controller for estimating a phase shifted multiplier. A current regulator generates a desired PFC current in response to an input voltage, an output load and the phase shifted and subsequently blanked multiplier. The electrical load operates in response to the sinusoidal input current based at least partially on the desired PFC current. | 2015-07-30 |
20150214834 | CONVERTER FOR HVDC TRANSMISSION AND REACTIVE POWER COMPENSATION - A power electronic converter for use in high voltage direct current power transmission and reactive power compensation comprises a plurality of switching elements interconnecting in use a DC network and one or more AC networks, the plurality of switching elements being controllable in use to facilitate power conversion between the AC and DC networks, wherein in use, the plurality of switching elements are controllable to form one or more short circuits within the power electronic converter so as to define one or more primary current flow paths, the or each primary current flow path including a respective one of the AC networks and the power electronic converter and bypassing the DC network. | 2015-07-30 |
20150214835 | SINGLE INPUT MULTIPLE INPUT/OUTPUT SUPPLY FOR ENERGY HARVEST APPLICATION - An apparatus comprises a switching power circuit and a control circuit. The switching power converter circuit includes an output port for electrical coupling to a variable load, an input port for electrically coupling to a first energy source, wherein the energy density of the first energy source is insufficient to meet a peak energy requirement of the variable load, an input/output port for electrical coupling to a second energy source, and one inductor electrically coupled to the input port and a circuit node, wherein the electrical coupling is non-switchable. The control circuit is configured to charge the inductor using the first energy source via the input port, to provide energy from the inductor to the load via the output port, and to provide both of, via the input/output port, energy from the inductor to the second energy source and energy from the second energy source to the variable load. | 2015-07-30 |
20150214836 | VOLTAGE DIVIDER CIRCUIT - Provided is a voltage divider circuit having a small area and good accuracy of a division ratio. Among a plurality of resistors of the voltage divider circuit, each of resistors having a large resistance value, that is, resistors (1/4R, 1/2R, 1R, 9R, 10R) having high required accuracy of ratio includes first unit resistors ( | 2015-07-30 |
20150214837 | CHARGE PUMP CIRCUIT - A charge pump circuit includes a first potential input terminal for receiving a first potential; a second potential input terminal for receiving a second potential; a pump cell group formed of a plurality of pump cells and connected in series between the first potential input terminal and the second potential input terminal; and a negative voltage boosting capacitor connected to a first connection node between the first potential input terminal and a forefront stage pump cell of the pump cell group. Each of the pump cells is configured to increase a boosted voltage using a transistor operating in synchronization with a clock signal input through a capacitor. | 2015-07-30 |
20150214838 | VOLTAGE REGULATOR - To provide a voltage regulator capable of preventing a reduction in output voltage and an increase in output noise in a steady state without performing suppression of an overshoot. A voltage regulator is equipped with an overshoot detection circuit which detects an overshoot on the basis of an output voltage, an overshoot suppression circuit which controls an output terminal of an error amplifier circuit, based on the output of the overshoot detection circuit, and a driver state discrimination circuit which discriminates the state of an output transistor, based on an output voltage of the error amplifier circuit. The driver state discrimination circuit is configured to control the operation of the overshoot suppression circuit. | 2015-07-30 |
20150214839 | CONSTANT ON TIME CONTROLLER - The present invention provides a constant on time controller packaged in one single package for controlling a buck converting circuit to convert an input voltage into an output voltage. The constant on time controller includes an input voltage detecting circuit, an on-time determining circuit and a driving circuit. The input voltage detecting circuit receives a bootstrap voltage to generate an input voltage detecting signal indicative of the input voltage. The on-time determining circuit receives the input voltage detecting signal and generates an on-time signal in response to the input voltage detecting signal and the output voltage. The driving circuit controls the buck converting circuit according to the n-time signal. | 2015-07-30 |
20150214840 | CONVERTER DEVICE AND CORRESPONDING METHOD - It is presented a converter device arranged to convert power between a first high voltage direct current, HVDC, connection, a second HVDC connection and an AC connection. The converter device comprises: a first power converter comprising a phase leg provided between terminals of the first HVDC connection, the phase leg comprising a positive arm, an inductor, an AC connection and a negative arm. Each one of the positive arm and the negative arm comprises converter cells and one of the converter cells is a first host converter cell. Each converter cell comprises two main switching elements and a storage element, the two switching elements being arranged serially in parallel with the energy storage element. The converter device also comprises a power converter section comprising a first converter cell comprising at least two switching elements connected serially in parallel with the energy storage element of the first host converter cell. The converter device is arranged to control the switching elements of the first switching element string in dependence of the state of the main switching elements of the first host converter cell. | 2015-07-30 |
20150214841 | DC-DC CONVERTER WITH IMPROVED ENERGY MANAGEMENT, METHOD FOR OPERATING THE DC-DC CONVERTER, ENVIRONMENTAL ENERGY HARVESTING SYSTEM USING THE DC-DC CONVERTER, AND APPARATUS USING THE ENERGY HARVESTING SYSTEM - A converter includes an inductor configured to receive an input signal and output configured to supply an electrical load with an output signal. The converter operates to charge the inductor until a maximum pre-set current value is reached during a first operating condition in which the electrical load is not supplied. Next, the converter actively supplies the electrical load by partially discharging the inductor during a first time interval of a second operating condition. Then, the converter passively supplies the electrical load by the residual charge of the inductor during a second time interval, subsequent to the first time interval, of the second operating condition, by discharging the inductor completely. | 2015-07-30 |
20150214842 | POWER MANAGEMENT ALARM DEVICES - A system including an alarm device, the alarm device further includes a switch mode buck converter, a capacitor that is charged by the buck converter, a boost converter that powers an output device primarily from energy drawn from the capacitor and circuitry coupled to the buck converter and boost converter, wherein the buck converter charges the capacitor with a relatively constant current and wherein the circuitry dynamically adjusts an instantaneous duty cycle of the buck converter to achieve the constant current based upon a power setting of the output device. | 2015-07-30 |
20150214843 | REBOOST POWER CONVERSION APPARATUS HAVING FLYBACK MODE - A reboost power conversion apparatus ( | 2015-07-30 |
20150214844 | Switching Power-Supply Device - Provided is a highly-efficient switching power-supply device having a wide input voltage range. The switching power-supply device includes: a first series circuit including first and second switching elements and a second series circuit including third and fourth switching elements, which are connected in parallel with a power supply; a series resonance circuit including a primary coil and a capacitor connected in parallel with the second switching element; a reactor connected between a connection point of the third and fourth switching elements and the capacitor; a transformer having the primary coil and a secondary coil; and a control circuit that turns on-and-off the first and second switching elements, alternately, and turns on-and-off the third and fourth switching elements, alternately. The control circuit switches the first and second series circuits when an input voltage is low and switches only the first series circuit when the input voltage is high. | 2015-07-30 |
20150214845 | CONTROL DEVICE FOR SWITCHING POWER SOURCE - A control device of an insulation type DC/DC converter includes a shunt regulator that detects an error in output voltage at the secondary side of a transformer, a photocoupler that transmits the detected error voltage to the primary side of the transformer, and a DPWM control unit on the primary side that generates a control pulse signal having a pulse width at a duty ratio based on the error voltage. The DPWM control unit includes an A/D conversion circuit, an A/D output stabilization circuit, a dither circuit, and a DPWM circuit. The A/D output stabilization circuit is provided after the A/D conversion circuit, and the output end of the A/D output stabilization circuit is connected to the input end of the dither circuit. | 2015-07-30 |
20150214846 | BI-MODAL VOLTAGE CONVERTER - A bi-modal voltage converter and associated method for reducing stress on secondary rectifiers and decreasing switching losses. An embodiment of the voltage converter comprises three switches and control circuitry that is operative, upon a determination with respect to the input voltage, to select between a two-switch operation and a three-switch operation. When the input voltage is greater than a threshold value, one of the three switches is permanently turned on, while the other two switches are controlled using a pulse-width modulated (PWM) signal. When the input voltage is equal to or less than the threshold value (e.g., requiring a duty cycle greater than 50%), all three switches are controlled by the PWM signal. | 2015-07-30 |
20150214847 | DC-DC CONVERTER, SECONDARY BATTERY CHARGE AND DISCHARGE SYSTEM, AND METHOD OF CONTROLLING DC-DC CONVERTER - In a DC-DC converter, a smoothing capacitor is connected between DC terminals of the switching circuit, and a smoothing capacitor and a voltage clamp circuit are connected between DC terminals of a switching circuit, the voltage clamp circuit including the switching device and the clamp capacitor. The smoothing capacitors are connected to the DC power sources) in parallel, respectively. The winding of the switching circuit is magnetically coupled to the winding of the switching circuit by the transformer. The DC-DC converter performs a discharging operation for discharging the clamp capacitor between at least one of the step-down operation and a step-up operation and a step-up operation performed thereafter. | 2015-07-30 |
20150214848 | POWER CONVERTER - In a power converter, at least two main current paths each including an inductor and a transistor are connected between input terminals, and at least two storage circuits each including capacitors are correspondingly connected to branch nodes of the main current paths. Diodes are connected between the storage circuits. The transistors of the main current paths are interleaved. When one of the transistors is turned off, a current flowing in the corresponding inductor flows into the corresponding storage circuit to turn on the diodes and to charge the capacitors of the corresponding storage circuit. When another one of the transistors is turned off, a current flowing in the corresponding inductor flows into the corresponding storage circuit to turn on the diodes and charge the capacitors of the corresponding storage circuit. | 2015-07-30 |
20150214849 | POWER CONVERTER OUTPUT VOLTAGE CLAMP AND SUPPLY TERMINAL - A secondary control circuit includes a voltage regulator circuit coupled to an output of the power converter to provide a regulated power supply. One or more switched loads are coupled between a first terminal and an output ground terminal. The first terminal is coupled to the output of the power converter. Each switched load is coupled to draw a respective current from a load current to clamp the output of a power converter. One or more comparator circuits are coupled to a second terminal. The second terminal is coupled to receive an output sense signal. Each comparator circuit is coupled to receive a reference signal that is a scaled representation of a first reference signal. Each switched load is switched in response to a respective comparator circuit to draw a respective current from the load current of the power converter to clamp the output of the power converter. | 2015-07-30 |
20150214850 | Synchronous Rectification Controller and Relevant Control Method - A timing controller provides adaptive timings to control a synchronous rectifier with a body diode. The timing controller has a ramp generator providing a ramp signal at a first capacitor. The ramp signal corresponds to a discharge time when the body diode is forward biased. A second capacitor records an estimated duration signal. An update circuit is connected between the first and second capacitors, for shorting the first and second capacitor to update the estimated duration signal by charge sharing. A comparator with two inputs coupled to the ramp signal and the estimated duration signal respectively compares the ramp signal and the estimated duration signal to control the synchronous rectifier. | 2015-07-30 |
20150214851 | Synchronous Rectification Controller and Relative Dead-Time Control Method - A synchronous rectification control method suitable for a switching mode power supply with a synchronous rectifier is disclosed. A synchronous rectification controller with a first pin is provided. A pin voltage at the first pin is sampled to generate a sampled voltage. After the sampling, a detection current is provided and it flows out of the synchronous rectification controller from the first pin. Digital dead-time control signals are generated in response to the pin voltage and the sampled voltage. The synchronous rectifier is controlled to determine a dead time of the synchronous rectifier, based upon the digital dead-time control signals. | 2015-07-30 |
20150214852 | SIGNAL TRANSMISSION CIRCUIT, SWITCHING SYSTEM, AND MATRIX CONVERTER - A signal transmission circuit includes an input terminal to which an input signal is input, a high-frequency oscillation circuit that outputs a high-frequency wave, a switching mixing circuit that modulates the high-frequency wave according to the input signal to generate modulated signals including first to third modulated signals, a first output terminal from which the first modulated signal is output, a second output terminal from which the second modulated signal is output, and a third output terminal from which the third modulated signal is output. While the first modulated signal is output from the first output terminal, the second and third modulated signals are not output. While the second modulated signal is output from the second output terminal, the first and third modulated signals are not output. While the third modulated signal is output from the third output terminal, the first and second modulated signals are not output. | 2015-07-30 |
20150214853 | SEMICONDUCTOR DEVICE, SWITCHING SYSTEM, AND MATRIX CONVERTER - A semiconductor device includes a semiconductor switch, a first rectifier circuit, and a second rectifier circuit. The semiconductor switch, the first rectifier circuit, and the second rectifier circuit are integrated on a common board. On the board, a first output terminal of the first rectifier circuit is coupled to a first gate terminal of the semiconductor switch, and a first output reference terminal of the first rectifier circuit is coupled to a first source terminal of the semiconductor switch. On the board, a second output terminal of the second rectifier circuit is coupled to a second gate terminal of the semiconductor switch, and a second output reference terminal of the second rectifier circuit is coupled to a second source terminal of the semiconductor switch. | 2015-07-30 |
20150214854 | Conversion System for Converting Direct Current into Alternating Current - A method and apparatus for converting direct current into alternating current. An initial voltage level of an input voltage source is changed using a dual converter to form a plurality of voltage sources. Each of the plurality of voltage sources has voltage levels different from the initial voltage level. An inverter is supplied direct current from the plurality of voltage sources formed by the dual converter. The direct current is converted into a number of alternating currents using the inverter. | 2015-07-30 |
20150214855 | HIGH POWERED CURRENT GENERATOR FOR ELECTROMAGNETIC INSPECTION OF HYDROCARBON PIPELINES - A high powered current generator for electromagnetic inspection of hydrocarbon pipelines from an AC stabilized with rectangular waveform and whose measurements and interpretation are used for evaluating the condition of the lining of the pipelines of five main modules: self-programmable regulated voltage power source module; power source reference decoupling module; H Bridge inverter module; feedback module, and control and processing module. The generator was specifically designed as part of the instrumentation of (TI EMS); which supplies an electric current in the pipeline to produce electromagnetic radiation along the hydrocarbon pipeline. This energy is detected by antennas for obtaining the location of the pipeline and the electric current flowing therein. The generator produces an alternating current at a frequency that can be set within the range of 0.1 Hz to 1 KHz. However, to simplify the job of the operating personnel, default values of 0.1, 0.2, 0.05, 1, 2, 4, 8, 98, 512 and 625 Hertz were established. The current value can also be programmed within the range of 0.1A to 4.5A. In order to facilitate the work of the operators, a set of fixed current values 0.100, 0.250, 0.500, 1.0, 1.5, 2.0 , 2.5, 3, 3.5, 4.0 and 4.5 Amperes was established. | 2015-07-30 |
20150214856 | THREE-LEVEL POWER CONVERTING APPARATUS - First to sixth switching elements forming a power conversion circuit for one phase in a three-level power converting apparatus include transistor elements and diode elements connected in reverse parallel to the transistor elements. Second, third, fifth, and sixth transistor elements are configured by MOSFETs that enable an electric current to flow in two directions. | 2015-07-30 |
20150214857 | Power Conversion Apparatus - An object of the present invention is to reduce the size of a power conversion apparatus and to improve the reliability. The power conversion apparatus includes a power semiconductor module, a driver circuit board mounted with a driver circuit, an AC-side relay conductor for transferring the alternating current, and an AC connector. The power semiconductor module includes an AC-side terminal connected to the AC-side relay conductor, and a control-side terminal connected to the driver circuit board. The AC connector is provided on the opposite side of the power semiconductor module through the driver circuit board. The driver circuit board includes a transformer for transforming voltage from low to high and supplying the transformed voltage to the driver circuit, and a line for connecting the transformer and the driver circuit. Further, the driver circuit board forms a through hold provided on the side opposite to the transformer with the driver circuit interposed therebetween. The AC-side relay conductor is connected to the AC-side connector, through the through hole. | 2015-07-30 |
20150214858 | OPERATING STATE CIRCUIT FOR AN INVERTER AND METHOD FOR SETTING OPERATING STATES OF AN INVERTER - The invention relates to an operating state circuit for driving an inverter with half-bridges having respective switching devices, which inverter supplies an n-phase supply voltage to an n-phase electrical machine via phase connections associated with the respective half-bridges, where n≧1. The operating state circuit comprises an evaluation device, which is connected to the phase connections of the inverter and to input connections of the inverter and is designed to detect an input voltage of the inverter and phase currents at the phase connections of the inverter, and a drive device which is coupled to the evaluation device and is designed to switch the inverter from a short-circuit state to a freewheeling mode on the basis of the detected input voltage, wherein the evaluation device is designed to generate a freewheeling trigger signal and to output said signal to the drive device if the detected input voltage is lower than an adjustable freewheeling threshold value, and wherein the drive device is designed to change the respective switching devices of the half-bridges to an open state after receiving the freewheeling trigger signal only when the particular phase current detected at the associated phase connection has a zero crossing or a current direction coming from the inverter. | 2015-07-30 |
20150214859 | POWER CONVERSION SYSTEM AND METHOD OF OPERATING THE SAME - A power conversion system mainly includes an input capacitor bank, a first conversion circuit, a second conversion circuit, and a control circuit. The input capacitor bank has a first capacitor and a second capacitor. The first capacitor and the second capacitor are connected to a neutral point and receive a DC input voltage. The first conversion circuit is connected in parallel to the input capacitor bank, and has a first branch, a second branch, and a first auxiliary branch. The second conversion circuit is connected in parallel to the input capacitor bank, and has a third branch, a fourth branch, and a second auxiliary branch. The control circuit produces a plurality of control signals to correspondingly control the first conversion circuit and the second conversion circuit so as to reduce leakage current caused by parasitic capacitance voltage. | 2015-07-30 |
20150214860 | ACTUATOR - An actuator includes a first deformable material layer, a second deformable material layer, and an intermediate layer provided between the first deformable material layer and the second deformable material layer. The first deformable material layer includes a first deformable material containing a first stimulus-responsive compound, which changes its molecular structure and also its color tone according to an oxidation-reduction reaction, a first polymeric material, a first electronically conductive substance having a light transmitting property, and a first electrolyte. The second deformable material layer includes a second deformable material containing a second stimulus-responsive compound, which changes its molecular structure and also its color tone according to an oxidation-reduction reaction, a second polymeric material, a second electronically conductive substance having a light transmitting property, and a second electrolyte. The intermediate layer inhibits electron transfer between the first deformable material layer and the second deformable material layer. | 2015-07-30 |
20150214861 | ASSEMBLY HAVING A MULTILAYER ACTUATOR - An assembly is described having at least one multilayer actuator having at least two electrode layers, between which an elastic dielectric layer made of an electrically non-conducting material, is situated, and the multilayer actuator is in mechanical connection, especially in direct contact with, a pressurized medium and displaces it from a working chamber when the multilayer actuator is actuated. | 2015-07-30 |
20150214862 | DIELECTRIC ELASTOMER POWERED BOAT AND ELECTRICITY GENERATOR AND ASSOCIATED METHOD - A system is disclosed in which ocean wave power compresses smart electro-active polymers (EAP) material. Dielectric elastomers (DE) convert ocean wave power pressure into electrical current. Advantageously, DE has a very high power density and elasticity. The resultant electrical power is directly used to operate an electric motor of a boat screw propeller or stored in a lithium-ion battery for any other use. The mechanical work produced by the movement of ocean waves can also be transformed into electrical current via a crank shaft and a dynamo using very strong magnets or neodymium magnets that are made of a combination of neodymium, iron, and boron (NdFeB). An underwater and above water screw propeller propagates the boat at high speed across the ocean. Electrical power produced on board during port parking or unused energy is connected to a transformer or supplied for recharging electrical vehicles or port lighting. | 2015-07-30 |
20150214863 | CONTROL DEVICE OF ELECTRIC SEALED COMPRESSOR, ELECTRIC SEALED COMPRESSOR APPARATUS, AND HOME APPLIANCE COMPRISING CONTROL DEVICE AND ELECTRIC SEALED COMPRESSOR APPARATUS - A control device ( | 2015-07-30 |
20150214864 | CONTROL SYNCHRONIZATION BETWEEN MULTIPLE CONTROL UNITS FOR RESOURCE LOAD SHARING - The present disclosure relates to a vehicle including a plurality of electric motors configured to drive a plurality of traction devices. The vehicle includes a first controller configured to control a first electric motor and a second controller configured to control a second electric motor. The first controller and the first electric motor are coupled to a first communication network, and the second controller and the second electric motor are coupled to a second communication network. The second controller includes synchronization logic operative to synchronize control of the second electric motor by the second controller with control of the first electric motor by the first controller based on a synchronization signal provided by the first controller over a communication link. | 2015-07-30 |
20150214865 | DC PERMANENT MAGNET SYNCHRONOUS MOTOR - A DC permanent magnet synchronous motor, including: a motor body including a rotating shaft, a permanent rotor assembly, a stator assembly, and a housing assembly; a motor controller including a first microprocessor for drive control, an inverter circuit, and a detection circuit for detecting operating parameters of the motor; and an external control card including a second microprocessor for application control. The operating parameters of the motor are input into the first microprocessor by the detection circuit. The first microprocessor outputs a PWM signal to control the inverter circuit. An output end of the inverter circuit is connected to a coil winding. The external control card is disposed outside the motor body and is connected to the motor body via an electric wire. The second microprocessor and the first microprocessor are interconnected so that they can communicate. | 2015-07-30 |
20150214866 | METHOD OF CONTROLLING A PERMANENT MAGNET MOTOR AND CORRESPONDING SYSTEM - A method for controlling a motor propulsion unit including a motor including a permanent magnet rotor and a stator, the method including regulating currents of the stator so that they attain their setpoints by virtue of control signals, the currents to be regulated and the control signals being expressed in a rotating reference frame including a plurality of axes. The regulating includes for each of the axes of the plurality of axes applying, to the current to be regulated on the respective axis, a linear operator differing as a function of a value of the current to be regulated with respect to its setpoint, the result of the application of the linear operator being a control signal on the respective axis. | 2015-07-30 |
20150214867 | INVERTER CONTROL DEVICE AND INVERTER CONTROL METHOD - An inverter control device includes an inverter; a command value calculator; a phase compensator; an inverter controller; a d-q axes non-interference voltage command value calculator for calculating a d-q axes non-interference voltage command value to cancel out interference voltages and for outputting the d-q axes non-interference voltage command value to the command value calculator; and a reverse phase. The phase compensator calculates the amount of phase lead based on the rotation speed and a phase compensation time set in order to obtain a predetermined phase margin, and compensates for a phase based on characteristics inherent in the motor, by the amount of phase lead. The reverse phase compensator compensates for a phase of the d-q axes non-interference voltage command value by the same amount of compensation as the amount of phase lead in the opposite direction to the phase compensated for by the phase compensator. | 2015-07-30 |
20150214868 | APPARATUS AND METHOD FOR DETECTING OVERCURRENT IN INVERTER - An apparatus for sensing an overcurrent is provided. The apparatus for sensing an overcurrent includes an inverter converting a direct current (DC) into an alternating current (AC) and supplying the AC to a motor to allow the motor to operate; a current sensing unit provided on a connection between the inverter and the motor and measuring an overcurrent of a control current value output from the inverter; and a control unit checking with the current sensing unit whether the overcurrent is sensed, and determining whether to operate the inverter, wherein the control unit creating an interrupt service routine (ISR) for checking overcurrent information and checks the overcurrent information according to a created ISR, when the overcurrent is sensed through the current sensing unit. | 2015-07-30 |
20150214869 | METHOD FOR OPERATING AND APPARATUS FOR ACTIVATING A ROTATING, BRUSHLESS ELECTRICAL MACHINE - A method for operating a brushless, rotating electrical machine, including at least three phase windings, each of which has a first phase winding terminal and a second phase winding terminal. The phase windings are connected to each other, in particular the particular second phase winding terminals are connected to a shared star point, and phase-width-modulated voltage signals being applied separately to each individual phase winding, and at least one selected phase winding being at least temporarily connected to a constant electrical potential. To minimize switching operations and to reduce the alternating current component of the current source, the pulses of the pulse-width-modulated signals applied to the remaining phase windings are at least temporarily phase-shifted with respect to each other during the period in which the selected phase winding is connected to a constant electrical potential. | 2015-07-30 |
20150214870 | OVER-VOLTAGE PREVENTION DEVICE AND CURRENT RECTIFYING CIRCUIT - According to one embodiment, an over-voltage prevention device includes a first short-circuit device provided between a secondary side of a wound-rotor induction machine and a frequency converter configured to excite the secondary side by a three-phase AC current and having a function of short-circuiting between phases of the three-phase AC current, resistors each connected between the first short-circuit device and the frequency converter for each phase, and second short-circuit devices connected respectively to the resistors in parallel and having a function of short-circuiting between the frequency converter and the secondary side of the wound-rotor induction machine. | 2015-07-30 |
20150214871 | Method and System for Determining Motor Shaft Position - The present disclosure provides methods and systems for determining the rotor position of a BLDC motor having a saliency. Techniques according to the present disclosure advantageously may be used to determine a rotor position of a rotor which is not moving. | 2015-07-30 |
20150214872 | Motor Driving Circuit, Motor Driving System, Electric Power Steering System, Electric Brake System, and Vehicle Driving System - In order to provide a motor driving circuit in which a portion corresponding to a failed phase can be separated while miniaturization and lower costs are achieved, a motor driving circuit for driving a motor includes: a second driver circuit for driving a driver circuit which supplies a drive current corresponding to one phase of a multiphase motor having three or more phases, to the multiphase motor; and an electrical circuit which includes a plurality of electrical components and switches a connecting relation between the electrical components according to an operation mode designated from outside the motor driving circuit, thereby providing a circuit function corresponding to the operation mode. | 2015-07-30 |
20150214873 | METHOD FOR DIAGNOSING A FREQUENCY CONVERTER - A method for diagnosing a frequency converter is used for a frequency converter having a positive and negative DC link voltage which is applied via bridges of switching elements in an alternating sequence to phases of a motor. Pulse width modulation (PWM) signals drive the switching elements for a respective one of the phases and current sensors capture phase currents. In a step a), PWM signals are applied as test patterns to the switching elements. In a step b), sensor signals of the current current sensors are picked up. In a step c), the sensor signals are evaluated by ascertaining a presence of the DC link voltage upon a displacement current being recognized in the sensor signals. | 2015-07-30 |
20150214874 | ACTIVE CLAMP FOR MOTOR DRIVER - An apparatus includes a clamp control circuit configured to control a first current to have a magnitude substantially equal to that of a second current when the second current has a first flow direction. The clamp control circuit is configured to control the first current to be substantially zero when the second current has a second flow direction. A method includes determining a value of a first current, controlling a second current to have a substantially zero value when the first current flows in a first direction, and controlling the second current to have a magnitude substantially equal to that of the first current when the first current flows in a second direction. The first current flows in the first direction when a winding of a motor is being supplied with energy and flows in the second direction when the winding of the motor is discharging energy. | 2015-07-30 |
20150214875 | Motor Control Device Provided with Motor Unit and Inverter Unit - Provided is a motor control device that detects a position error between a detection position, calculated from a rotation position sensor signal of a motor, and a position of a motor induced voltage and performs phase correction. A motor control device | 2015-07-30 |
20150214876 | POWER CONVERSION DEVICE AND METHOD OF CONTROLLING THE SAME - A power conversion device includes an inverter which can convert between DC and AC power by turning on and off bridge-connected semiconductor switching elements with free wheel diodes connected in reverse parallel; and a rotating electric machine, such as an AC generator or motor, which is connected to the AC terminals of the inverter, where when the DC voltage of the inverter is below a specified value when starting the machine, the speed of the machine is detected in a condition where the DC voltage of the inverter is boosted to at least a specified value of the induced voltage of the machine, by intermittently turning on and off at least one of the switching elements, so as to accurately detect the speed of the machine and stably start it even when the DC voltage of the inverter is lower than the induced voltage of the machine. | 2015-07-30 |
20150214877 | POWER SUPPLY SYSTEM FOR A DIRECT-CURRENT DRIVE AND METHOD FOR SAFETY-RELATED DISCONNECTION OF A DIRECT-CURRENT DRIVE - An exemplary power supply system for a direct-current drive includes a power converter for at least one direction-dependent two-quadrant operating mode, at least one associated pulse-based actuation device, an input-side connection and an output-side connection for the power converter, and at least one mechanical interruption device for the input-side connection and/or the output-side connection. The power supply system is provided to continually provide values of a current flowing on the output-side during operation by receiving an STO (safe torque off) signal, immediate changeover of the power converter operating mode into the inverter limitation if an STO signal is received, interrupting a feed of actuation power through the actuation device into the power converter, and supplying an interruption signal to the at least one mechanical interruption device once a second subsequent time interval has elapsed and the current flowing on the output side has not decayed below a safety-critical limit value. | 2015-07-30 |
20150214878 | MOTOR CONTROL DEVICE AND METHOD FOR DETECTING OUT-OF-STEP - There is provided a motor control device for controlling a stepping motor having at least two coils. The motor control device includes a controller applies a pulse voltage being subjected to pulse width modulation to each of the coils and provides a stop period to a target coil being subjected to switching of a direction of the coil current, during which the application of the pulse voltage to the target coil is temporarily stopped. The controller also performs a control to set on-duty of the pulse voltage applied to all of the coils except the target coil to be either 100% or 0% during the stop period. An out-of step of the stepping motor is detected when a back electromotive voltage induced in the target coil during the stop period satisfies a predetermined out-of-step determination criterion. | 2015-07-30 |
20150214879 | SYSTEM AND METHOD FOR A STOICHIOMETRIC EXHAUST GAS RECIRCULATION GAS TURBINE SYSTEM - A non-transitory, computer readable medium stores instructions executable by a processor of an electronic device. The instructions include instructions to determine that a transient event is occurring in an electrical grid coupled to an EGR gas turbine system, wherein the transient event is an under-frequency or an under-voltage event. The instructions also include instructions to increase a flow rate of fuel to a combustor of the EGR gas turbine system in response to the transient event when the EGR gas turbine system is operating in a non-stoichiometric combustion mode. The instructions further include instructions to increase a flow rate of oxidant to the combustor before increasing the flow rate of fuel to the combustor, or to decrease a local consumption of the electrical power to increase a portion of the electrical power that is exported to the attached electrical grid, or both, in response to the transient event when the EGR gas turbine system is operating in a stoichiometric combustion mode. | 2015-07-30 |
20150214880 | Energy conversion apparatus with tuned circuit - Apparatus for an electromagnetic engine producing both mechanical and electrical power. The apparatus includes a signal generator, such as a device that plays a pre-recorded signal. The output of the signal generator is connected to an amplifier that is connected to a first coil assembly. The coils are positioned around a cylindrical cavity or sleeve in which a permanent magnet piston reciprocates in response to the amplified signal applied to the coils. A second coil assembly is magnetically coupled to the first coil assembly. The second coil assembly includes a tuned circuit and provides an electrical output. The tuned circuit of the second coil assembly includes a coil and a capacitor selected for a specific frequency. | 2015-07-30 |
20150214881 | DEVICE AND METHOD FOR CONTROLLING ELECTRIC MOTOR - A device for controlling an electric motor is provided. The device includes: an inverter supplying a current to an electric motor; a current sensor sensing a current supplied from the inverter to the electric motor; and a control unit enabling the current to be supplied from the inverter to the electric motor, obtaining first and second offset values sensed from the current sensor at a plurality of times, comparing the plurality of offset values obtained, and updating the first offset value to the second offset value according to a result of comparing the offset values. | 2015-07-30 |
20150214882 | POWER CONVERSION DEVICE AND ELECTRIC POWER STEERING DEVICE USING THE SAME - A power conversion device includes: an inverter that includes high potential side switching elements connected to a high potential side and low potential side switching elements connected to a low potential side, and converts a current for supplying a rotating electric machine; a current detector having a sensor disposed on at least one of a positive bus for connecting the high potential side switching elements and a positive side of a DC power supply or a negative bus for connecting the low potential side switching elements and a negative side of the DC power supply; an energization device that energizes the sensor without passing through the inverter; and a controller that acquires a current detection value from the current detector, and controls the inverter and the energization device. The energization device energizes the sensor when all of high or low potential side switching elements are off. | 2015-07-30 |