42nd week of 2011 patent applcation highlights part 20 |
Patent application number | Title | Published |
20110254438 | ARC TUBE FOR DISCHARGE BULB - An arc tube for a discharge bulb, comprising a sealed glass bulb in which luminous materials are sealed; a plurality of pinch-sealed portions made of quartz glass and formed at both end portions of the sealed glass bulb; a plurality of molybdenum foils each pinch sealed in the corresponding pinch-sealed portion; a pair of electrode rods provided in the sealed glass bulb so as to face each other, wherein each of electrode rods extends from the sealed glass bulb to the corresponding pinch-sealed portion and is connected to one end of the corresponding molybdenum foil; and a plurality of lead wires each connected to the other end of the corresponding molybdenum foil, wherein the molybdenum foils comprise a plurality of closed cavities therein. | 2011-10-20 |
20110254439 | VEHICULAR DISCHARGE LAMP - A vehicular discharge lamp that emits light by a DC lighting system, the vehicular discharge lamp includes: an outer tube; a light emitting tube disposed in the outer tube and including a light emitting portion and fine tube portions connected to the light emitting portion; cathode-side and anode-side electrodes disposed in the light emitting tube; two lead wires connected to the electrodes; and a metal film or a metal oxide applied on an outer peripheral surface of the fine tube portion on an anode side of the light emitting tube, or the metal wire being wound on the outer peripheral surface. Inert gas having negative pressure is filled in a space outside the light emitting tube in the outer tube, and a negative high-voltage pulse is applied to the anode-side electrode at a time of start-up. | 2011-10-20 |
20110254440 | ORGANIC ELECTROLUMINESCENCE DISPLAY DEVICE AND METHOD FOR PRODUCING THE SAME - It is an object of the present invention to provide an organic electroluminescent display device and a production method thereof with which an organic electroluminescent display device having a high extraction efficiency is produced in a high yield. The present invention is an organic electroluminescent display device, comprising: a component placement substrate having an organic electroluminescence element; a circuit board having a driver circuit for the organic electroluminescence element, the component placement substrate and the circuit board being joined to each other; and a conductor in a clearance between the component placement substrate and the circuit board, the component placement substrate comprising in this order from an observation face side: a transparent separation layer; a light-scattering layer; a transparent electrode; a light-emitting layer; and the reflective electrode, wherein the conductor electrically connects the reflective electrode to an electrode of the driver circuit. | 2011-10-20 |
20110254441 | SOLID STATE LIGHT ASSEMBLY WITH CONTROL CIRCUIT - A light assembly that includes a cover, a housing coupled to the cover, and a lamp base coupled to the cover. The light assembly also includes a first circuit board disposed within the housing. The first circuit board has a plurality of light sources thereon. A heat sink is thermally coupled to the light sources and is disposed within the housing. The heat sink includes openings therethrough. Each of the outer edges is in contact with the housing. The light assembly also includes an elongated control circuit board assembly electrically coupled to the light sources of the first circuit board and the lamp base. The control circuit board extends through the openings. The control circuit board has a plurality of electrical components thereon for controlling the light sources. | 2011-10-20 |
20110254442 | MAGNETRON AND MICROWAVE-USING EQUIPMENT - A magnetron for holding deformation of a cathode side tube for alignment of a cathode filament and eliminating the need for alignment at the time of exterior assembly work of the magnetron is provided. The magnetron of the invention includes an anode cylinder; a cathode side tube hermetically coupled to a lower portion of the anode cylinder; and a shield cylinder having a cylindrical part extending in substantially a vertical direction, a flange part which is connected to the cylindrical part and extends in substantially a horizontal direction over the entire periphery of the cylindrical part, and a folded part in which a portion of the flange part is folded toward the cathode side tube, the shield cylinder being electrically coupled to the cathode side tube at a lower end of the anode cylinder. | 2011-10-20 |
20110254443 | PHASE AND FREQUENCY LOCKED MAGNETRON - A magnetron of improved performance capable of stabilizing the frequency and phase of magnetron output for use in particle accelerators and other applications. Thin variable-permeability blocks are attached inside the resonant anode structures of a standard magnetron design. A variable bias electromagnet, with field orthogonal in direction to the RF magnetic field, is used to vary the permeability of each block and therefore the resonant frequency of each anode structure. An electronic feedback control circuit adjusts the bias magnetic fields to lock in the frequency and phase of the magnetron output to an external low-level reference signal. Such devices may be used to provide synchronized high-power RF to many locations (e.g. the RF cavities of a particle accelerator), while requiring the distribution only of electrical power and an appropriate low-level RF reference signal. | 2011-10-20 |
20110254444 | HIGH-VOLTAGE CIRCUIT INSERTION-TYPE DISCHARGE ELEMENT - A discharge device includes a dielectric, a first electrode and a second electrode arranged with the dielectric interposed therebetween, and a circuit unit to which the first electrode and the second electrode are electrically connected for generating a high voltage to be applied to the first electrode and to the second electrode. The dielectric is formed in a tube shape or a pipe shape having therein the circuit unit. | 2011-10-20 |
20110254445 | METHOD FOR CONTROLLING A LIGHTING SYSTEM IN AN AIRCRAFT CABIN - The invention relates to a method for controlling a lighting system in an aircraft cabin with a multiplicity of lighting units ( | 2011-10-20 |
20110254446 | Headlamp assembly - In a light chamber formed in a housing case and a lens cover placed at a front part of the housing case in a headlamp assembly, a projection lens, a shade and a light source are arranged in line from the front side of the light chamber along an optical axis of the light source. A radiating member has radiating fins of a plate shape vertically placed in the light chamber, and radiates heat energy generated by the light source to surrounding air. A slit composed of a vertical slit part and an inclined-slit part is formed in each of the radiating fins. The formation of the slit generates a change of heat capacity and a temperature difference at upper and bottom parts of each of the radiating fins. The incline-slit part is extended from the top of the vertical slit part to the upper part of the radiating fin. | 2011-10-20 |
20110254447 | Discharge lamp lighting apparatus - A discharge lamp lighting apparatus includes a capacitor, a charge circuit for charging the capacitor, a switching element, a gate driving circuit that controls ON and OFF states of the switching element, a simmer current supply circuit for passing simmer current through a discharge lamp, a starting circuit that impresses high voltage to a starting electrode, and an electric discharge sequence control circuit that generates the gate signal and the starting signal. When lighting the discharge lamp, a sequence of the gate signal corresponding to an alternating repetition of the ON and OFF states of the switching element is generated. Before outputting the starting signal, the switching element is ON as a stand-by state. Then the sequence starts when the starting signal is outputted. | 2011-10-20 |
20110254448 | METHOD AND SYSTEM FOR INCREASING THE LIFESPAN OF A PLASMA - A method and a system for increasing the lifespan of a plasma obtained in the atmosphere. The method includes the following steps: emitting a femtosecond laser pulse, referred to as a first pulse, generating a column of plasma by the filamentation phenomenon, and emitting a second YAG laser pulse, focused by way of an axicon on a line in the plasma column, the energy of the photons of the second laser pulse being greater than the attachment energy of the electrons in the plasma to neutral molecules such as oxygen molecules. The duration of the second pulse is greater than the duration of the first pulse, and the delay between the two pulses is greater than one microsecond. | 2011-10-20 |
20110254449 | FLUORESCENT EXCIMER LAMPS - Excimers are formed in a high pressure gas by applying a potential between a first electrode ( | 2011-10-20 |
20110254450 | PROCESS AND APPARATUS FOR REPLACING LEDs ON TRAFFIC SIGNS - A traffic sign having one or more easily replaceable LED assemblies that can easily be removed or replaced and that make reliable water resistant electrical connection with one or more suitably-designed LED holders, which are installed in various locations as desired on the traffic sign or structure, is disclosed. A control circuit that supplies direct current at suitable levels of DC voltage and DC current to the one or more LED holders that are connected together using series, parallel or combination series and parallel wiring connections in order to provide electrical power to the one or more LED assemblies is provided. Wherein the one or more LED holders also include compensation circuits that enable any failed LED assembly to be electrically bypassed so that the control circuit then automatically adjusts the DC current or DC voltage levels supplied to the remaining traffic sign LEDs so that the remaining LED Assemblies continue to operate properly. | 2011-10-20 |
20110254451 | APPARATUS AND METHOD FOR PREVENTING LAMP DAMAGE IN RAPID HEAT TREATMENT EQUIPMENT - Disclosed are an apparatus and method for preventing damage to the lamp of rapid heat treatment equipment. The most significant feature of the present invention is to provide an apparatus and method for preventing damage to a lamp in rapid heat treatment equipment, wherein the temperature of a quartz case comprising the lamp is sensed to identify an erratic increase in the temperature thereof so that problems with the lamp may be discovered early to take action. The apparatus and method according to the present invention allows the possibility of preventing damage or contamination of surrounding components due to lamp explosion; decisions regarding lamp replacement are also facilitated so that productivity can be enhanced. In addition, uniform lamp output may be ensured so that product quality is enhanced. | 2011-10-20 |
20110254452 | GAS DISCHARGE LAMPS - An electronic ballast ( | 2011-10-20 |
20110254453 | SYSTEM PROVIDING AUTOMATIC AND MANUAL CONTROL OF AN ILLUMINATION LEVEL IN A SPACE - A method of controlling a light level in a space of a building, the method comprising the steps of measuring the light level in the space; automatically adjusting the light level in the space towards a control setpoint; receiving an input to manually override the light level in the space to an override light level; adjusting the light level in the space to the override light level; temporarily adjusting the control setpoint from a default setpoint to a temporary setpoint in response to the manual override of the light level, the temporary setpoint representative of the override light level; subsequently adjusting the control setpoint from the temporary setpoint back to the default setpoint; and adjusting the default setpoint in response to repeated manual overrides of the light level that result in repeated adjustments of the control setpoint. | 2011-10-20 |
20110254454 | LED DRIVING DEVICE, LIGHT SOURCE DEVICE, AND LIQUID CRYSTAL DISPLAYING DEVICE - A first power supply voltage Vin | 2011-10-20 |
20110254455 | DUAL POWER SOURCE PULSE GENERATOR FOR A TRIGGERING SYSTEM - An ablative plasma gun having a dual power source pulse generator is configured to generate a high voltage low current pulse and a low voltage high current pulse. A pair of electrodes are disposed and configured to receive the high voltage low current pulse, and to receive the low voltage high current pulse in response to the high voltage low current pulse. | 2011-10-20 |
20110254456 | Current Balancing Circuit For LED Strings - A current balancing circuit includes a plurality of LED strings each formed by a series-connection of a plurality of LEDs, a current mirror module including the same number of tri-electrodes elements as that of the LED strings, and a constant-current source providing a constant current for the LED strings. Two electrodes of one of the tri-electrodes elements are short-connected with each other, and the tri-electrodes elements are further connected with one another through one short-connected electrode thereof so as to achieve a mirror effect. The tri-electrodes elements are further one-on-one series-connected with the corresponding LED strings respectively so as to make the LED strings equally distribute the constant current from the constant-current source on the basis of the mirror effect of the current mirror module. | 2011-10-20 |
20110254457 | CIRCUIT FOR THE OPERATION OF AT LEAST ONE LED - A circuit for operating at least one LED (“driver circuit”) includes input terminals to be connected to an input or operating voltage in the form of a direct current (DC) voltage or a rectified alternating current (AC) voltage, and output terminals to be connected to a load circuit containing the at least one LED. The circuit includes a clocked switch and an open-loop control circuit for clocking the switch. The open-loop control circuit is in the form of an integrated circuit (IC) and is provided with input and output pins. The open-loop control circuit generates a clock signal for the switch depending on at least two actual value signals, such that there is a control loop with the manipulated variable “clocking of the switch.” | 2011-10-20 |
20110254458 | OUTPUT CONTROLLABLE FREQUENCY MODULATION ELECTRONIC BALLAST - An output controllable frequency modulation electronic ballast includes a first stage for converting AC current into DC current and boosting of voltage; a buck DC-DC converter; a transistor of the buck DC-DC converter having an input end which is selected from a gate for MOSFET and a base for a bipolar transistor; and a PWM controller connected between the input end of the buck DC-DC converter and an output end of the lamp body; a frequency controllable oscillator being connected to the PWM controller for providing variable frequency to the PWM controller as a base band signals of the PWM controller; and an oscillation controlling processor being connected to the frequency controller oscillator for generating instructions to change the oscillation frequency of the frequency controller oscillator and thus to adjust the modulation frequency of the output of the PWM controller. | 2011-10-20 |
20110254459 | COLOR PROJECTION LAMP - A lamp that produces an infinitely variable range of time, space, and color patterns. The lamp includes a plurality of colored light sources that produce light in at least two different visual spectrums, a single modulation device that generates a modulation scheme for each of the plurality of light sources, a display screen, and a mask that masks off at least a portion of light illuminating the display screen. The generated modulation scheme is produced at a predefined intensity level. A controller selectively alters delivery of the modulation scheme to each of the plurality of light sources. A first switch allows a user to select one of a plurality of modulation schemes. A second switch allows a user to alter the predefined intensity level. A third switch allows a user to select one of a plurality of modulation rates. | 2011-10-20 |
20110254460 | LIGHT EMITTING CONTROL DEVICE AND METHOD THEREOF FOR LIGHT EMITTING DIODE PRINT HEAD - A light emitting control device for a light emitting diode print head includes a control unit, a pulse-mask unit, a strobe unit and a data output unit. The pulse-mask unit outputs n clock signals in sequence to a light emitting diode print head. The strobe unit outputs a strobe signal to the light emitting diode print head, so as to switch on the light emitting diode print head. The data output unit outputs a print data signal to the light emitting diode print head. When the pulse-mask unit outputs a k-th clock signal of the n clock signals, the pulse-mask unit delays the k-th clock signal for a predetermined time, and the data output unit pauses outputting the print data signal. After the predetermined time, the pulse-mask unit and the data output unit continue to output the rest of the clock signals and the print data signal. | 2011-10-20 |
20110254461 | Power adaptors - A power adaptor ( | 2011-10-20 |
20110254462 | CONTROL CIRCUIT AND METHOD FOR LED DRIVERS - A control circuit and method for a LED driver accurately control the output current of the LED driver by adjusting a reference voltage or a feedback voltage according to the input voltage of the LED driver such that the output current decreases with the decrease of the input voltage. Therefore, it enhances the efficiency of the LED driver and maximizes the battery use time of a battery powered system. | 2011-10-20 |
20110254463 | METHOD FOR OPERATING A LAMP AND ELECTRONIC BALLAST - A method for operating a lamp may include: Connecting a device to a pair of input connections of an electronic ballast and by this means determining a respective dimming duration for at least one predetermined situation; and Activating the lamp by the electronic ballast in at least one predetermined situation such that the lamp emits light with a reduced intensity compared with the normal intensity at which the lamp otherwise emits light over a period of a dimming duration determined for this situation. | 2011-10-20 |
20110254464 | PULSE WIDTH MODULATION (PWM) CLOSED LOOP LED CURRENT DRIVER IN AN EMBEDDED SYSTEM - Methods and systems for providing stable and accurate low noise DC reference voltage are described. In the described embodiments, a feedback controlled DC reference voltage supply provides a stable and well controlled sense current. The sense current is in turn used to produce a stable and well controlled light output from a light emitting diode (LED). | 2011-10-20 |
20110254465 | LIGHT EMITTING DIODE DRIVE CIRCUIT DEVICE - The present invention discloses an LED drive circuit device. The LEDs are installed in a lamp-set and two ends of the lamp-set are provided respectively with two pins to receive a high frequency AC outputted from a ballast, with the two pins being further electrically connected with a drive circuit module. The drive circuit module includes primarily a resonant network correction circuit and a rectifying circuit. The resonant network correction circuit adjusts the high frequency AC received by the two pins to comply with an application range of LED current and then the rectifying circuit converts the AC into a DC which is next outputted through other two pins. By applying the aforementioned circuits, the LED lamp-set can be applied to an ordinary electronic ballast, thereby achieving high compatibility. | 2011-10-20 |
20110254466 | LIGHTING APPARATUS HAVING PLURAL ANALOG OUTPUTS - The invention provides a system of generation of multi-channel analog output signals, from a single analog input signal, and the controlled activation of peripheral devices responsive to the multi-channel analog output signals. A single-channel to multi-channel analog-to-analog converter is provided to convert the single analog input signal to multiple output channels. Uni-directional coupling is used for coupling and mixing the multi-channel outputs and transferring the mixed outputs to a data bus. Signals on the data bus are used to drive the multiple peripheral devices. | 2011-10-20 |
20110254467 | TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - A two-terminal current controller regulates a first current flowing through a load, which is coupled in parallel with the two-terminal current controller, according to a voltage established across the two-terminal current controller. When the voltage established across the two-terminal current controller does not exceed a first voltage, the two-terminal current controller conducts a second current related to a rectified AC voltage, thereby limiting the first current to zero and regulating the second current according to the load voltage. When the voltage established across the two-terminal current controller is between the first voltage and a second voltage, the two-terminal current controller conducts the second current, thereby limiting the first current to zero and limiting the second current to a constant value larger than zero. When the voltage established across the two-terminal current controller is greater than second voltage, the two-terminal current controller is turned off. | 2011-10-20 |
20110254468 | VOLTAGE CONVERTER AND DRIVING METHOD FOR USE IN A BACKLIGHT MODULE - A voltage converter for use in a backlight module stores energy of an input voltage using an inductor and outputs a plurality of output voltages accordingly. The charging path of the inductor is controlled according to the first output voltage so that the first output voltage can be stabilized. The discharging paths from the inductor to other output voltages are controlled according to the differences between other output voltages and the first output voltage so that other output voltages can also be stabilized. | 2011-10-20 |
20110254469 | DIMMING CIRCUIT AND METHOD FOR LEDS - A dimming circuit and method for a LED provide a first driving voltage or a second driving voltage according to a dimming signal provided by a functional IC to enable or disable the LED. The values of the first and second driving voltages are controlled so that overstressing of the LED is avoided while the functional IC is capable of working even when the LED is off. The LED's life time is thus prolonged. | 2011-10-20 |
20110254470 | Collapsible Lighting Device - A collapsible lighting device including a plurality of light panel sections, each light panel section comprising a plurality of light emitting elements, at least one connection element constructed and arranged to connect one or more light panel sections of the plurality of light panel sections to one another, and an electronic control system configured to distribute electrical power to the plurality of light emitting elements. | 2011-10-20 |
20110254471 | LIGHT EMITTING SYSTEM AND METHOD OF FABRICATING AND USING THE SAME - A light emitting system is disclosed. The system comprises an active region having a stack of bilayer quantum well structures separated from each other by barrier layers. Each bilayer quantum well structure is formed of a first layer made of a first semiconductor alloy for electron confinement and a second layer made of a second semiconductor alloy for hole confinement, wherein a thickness and composition of each layer is such that a characteristic hole confinement energy of the bilayer quantum well structure is at least 200 meV. | 2011-10-20 |
20110254472 | POWER TOOL HAVING A NON-LINEAR TRIGGER-SPEED PROFILE - A power tool including a motor, an input unit such as a variable-speed trigger switch, and a controller is provided. The controller controls the speed of the motor as a function of the input level indicated by the electrical signal from the input unit. The function is a first expression within a first predetermined range of the input level and a second expression within a second predetermined range of the input level, where the second expression corresponds to a polynomial of a second degree or higher and is different from the first expression | 2011-10-20 |
20110254473 | ARRANGEMENT AND METHOD FOR CONTROLLING FREQUENCY CONVERTER MODULES - An arrangement for controlling frequency converter modules of an electric drive. In the arrangement, the frequency converter modules are arranged to control alternatively a first motor or several motors having less power than the first motor. | 2011-10-20 |
20110254474 | Rotating Electric Machine and Electric Vehicle - A rotating electric machine includes a stator having a stator coil and a rotor provided rotatably around a specific rotation axis with respect to the stator. The rotor includes a plurality of magnets, a plurality of magnetically-assisted salient pole members provided between poles of any adjacent two magnets from among the plurality of magnets, and a magnetoresistance variation unit provided in the magnetically-assisted salient pole member along an axial direction of the rotation axis at a position offset in a circumferential direction of the rotation axis from a q-axis passing through a salient pole center of the magnetically-assisted salient pole member. The amount of offset of the magnetoresistance variation unit from the q-axis varies depending on positions of the magnetically-assisted salient pole members so that torque fluctuations cancel each other when power is applied. | 2011-10-20 |
20110254475 | ELECTRIC BRAKE SYSTEM WITH MAGNETIC LOSS - An electric brake system for an electromechanical machine connected to output terminals of an inverter, input terminals of which are supplied by a DC voltage source. The system includes an electrical circuit connected between the input terminals of the inverter and including, connected in series: a mechanism dissipating electrical energy returned by the electromechanical machine to the input terminals of the inverter during a braking phase of the electromechanical machine, including an inductor wound around a magnetic circuit; and a switching mechanism to close the electrical circuit during a braking phase of the electromechanical machine and to open the electrical circuit in absence of a braking phase of the electromechanical machine. | 2011-10-20 |
20110254476 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage having a ripple of at least 50%, exciting a winding of the motor with the rectified voltage, and performing a first process or a second process in response to current in the winding exceeding a threshold that is proportional to the rectified voltage. The first process includes freewheeling the winding, while the second process includes continuing to excite the winding for an overrun period and freewheeling the winding at the end of the overrun period. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254477 | BLOWER MOTOR FOR HVAC SYSTEMS - A blower motor assembly having a variable speed motor that is suitable for replacing a PSC motor in a residential HVAC (heating, ventilation, and air conditioning) system. The blower motor assembly includes a variable speed motor and motor controller; a first power input for receiving a plurality of AC power signals from a control device for use in determining an operating parameter for the motor; and a second power input for receiving AC power from an AC power source for powering the motor controller even when no AC power signals are received by the first power input. | 2011-10-20 |
20110254478 | Motor System and Method for Operating a Motor System - A method for operating a drive unit for an electric motor, wherein the drive unit has a drive circuit for driving the electric motor and an intermediate circuit, which is connected upstream of the drive circuit, in particular having an intermediate circuit capacitor. The method includes supplying an actuating variable for driving the electric motor. The method further includes adjusting a variable input voltage and supplying the adjusted input voltage to the drive unit via the intermediate circuit. In addition, the method includes operating the drive circuit as a function of an available intermediate circuit voltage, which is dependent on the adjusted input voltage, and as a function of the actuating variable in order to drive the electric motor in accordance with the actuating variable. | 2011-10-20 |
20110254479 | BRUSHLESS MOTOR ROTATION-POSITION DETECTION SYSTEM - A rotation-position detection system according to the present invention is configured with a resolver mounted in a brushless motor and a motor controller. The motor controller outputs an excitation signal to the resolver and an A/D converter thereof alternately applies analogue/digital conversion to a sine wave signal and a cosine wave signal outputted from the resolver so that a rotation position of the motor is calculated. | 2011-10-20 |
20110254480 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage, exciting a winding of the motor with the rectified voltage for a conduction period over each electrical half-cycle of the motor, and updating the conduction period in response to a zero-crossing in the alternating voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254481 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage, exciting a winding of the motor with the rectified voltage and freewheeling the winding when current in the winding exceeds a threshold. The winding is freewheeled for a freewheel period, which is updated in response to a zero-crossing in the alternating voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254482 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes exciting a winding of the motor with a voltage, and freewheeling the winding when current in the winding exceeds a threshold or after the winding has been excited for a timeout period. The timeout period is adjusted in response to a change in one of the voltage and the motor speed. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254483 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage, and exciting a winding of the motor with the rectified voltage. The winding is excited in advance of predetermined rotor positions by an advance period that is updated in response to a zero-crossing in the alternating voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254484 | CONTROLLER FOR A BRUSHLESS MOTOR - A controller for a brushless motor that includes an input for receiving an analog signal, an analog-to-digital converter (ADC) for sampling the analog signal, and a processor. The processor starts the ADC during a first electrical half-cycle and reads the ADC during a second electrical half-cycle of the motor. Additionally, a motor system that includes the controller. | 2011-10-20 |
20110254485 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes exciting a winding of the motor for a conduction period over each electrical half-cycle of the motor. The length of the conduction period is defined by a waveform that varies periodically with time. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254486 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage, and exciting a winding of the motor with the rectified voltage. The winding is excited in advance of predetermined rotor positions by an advance period and is excited for a conduction period over each electrical half-cycle of the motor. The length the advance period and/or the conduction period is defined by a waveform that varies periodically with time. The method then includes adjusting the phase of the waveform relative to the alternating voltage in response to a change in one of motor speed and RMS value of the alternating voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254487 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes exciting a winding of the motor in advance of predetermined rotor positions by an advance period. The length of the advance period is defined by a waveform that varies periodically with time. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254488 | CONTROL OF A BRUSHLESS PERMANENT-MAGNET MOTOR - A method of controlling a brushless permanent-magnet motor that includes rectifying an alternating voltage to provide a rectified voltage having a ripple of at least 50%, and exciting a winding of the motor with the rectified voltage. The winding is excited in advance of zero-crossings of back EMF by an advance period and is excited for a conduction period over each electrical half-cycle of the motor. The advance period and/or the conduction period are then adjusted in response to changes in the speed of the motor and/or the RMS value of the alternating voltage so as to maintain constant average power. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254489 | CONTROL OF A BRUSHLESS MOTOR - A method of controlling a brushless motor that includes exciting a winding of the motor until current in the winding exceeds a threshold, and then continuing to excite the winding for an overrun period. The length of the overrun period is adjusted in response to a change in one of time, motor speed and excitation voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system. | 2011-10-20 |
20110254490 | MOTOR-DRIVING APPARATUS - A motor-driving apparatus, comprising a main driving unit having a plurality of main current-driving ends coupled to a stator coil of a motor, a detection control unit coupled to the main driving unit, and an auxiliary driving unit coupled to the detection control unit and having a plurality of auxiliary current-driving ends. Wherein, the number of the main current-driving ends is the same as that of the auxiliary current-driving ends, and each of the main current-driving ends is connected to a respective one of the auxiliary current-driving ends in parallel. | 2011-10-20 |
20110254491 | SYNCHRONOUS-MACHINE STARTING DEVICE - A synchronous-machine starting device includes an induction voltage operating unit ( | 2011-10-20 |
20110254492 | SYSTEM HAVING A VARIABLE FREQUENCY POWER DISTRIBUTION BUS FOR DRIVING A VARIABLE SPEED MOTOR - A system and method for supplying power to a variable speed motor for rotating a shaft may include generating an A/C output having a variable frequency corresponding to speed of a prime mover, where the speed of the prime mover is equal to or greater than a predetermined speed limit. The A/C output of the prime mover may be distributed to the variable speed motor such that the speed of the variable speed motor is varied relative to the frequency of the A/C output. The variable speed motor may be electrically disconnected from the A/C power when the speed of the prime mover being used to drive the variable speed motor is equal to or within a predetermined range of the predetermined speed limit. An alternate A/C output may be distributed to the variable speed motor after the A/C power is electrically disconnected from the variable speed motor. | 2011-10-20 |
20110254493 | METHOD AND ARRANGEMENT IN CONNECTION WITH ELECTRIC DEVICE SYSTEM - A method and arrangement in connection with an electric drive system are provided. The electric drive system includes an intermediate circuit with two or more supply units and two or more inverter units connected thereto, and an electric machine having two or more three-phase windings galvanically separated from each other. Two or more inverter units are connected to the three-phase windings. The arrangement also includes first main circuit switches to galvanically separate each supply unit from a supply, second main circuit switches to galvanically separate each supply unit from the intermediate circuit, first intermediate circuit switches to galvanically separate each inverter unit from the intermediate circuit, and second intermediate circuit switches to galvanically separate each inverter unit from the electric machine. | 2011-10-20 |
20110254494 | RAPID REVERSIBLE CHARGING DEVICE FOR AN ELECTRIC VEHICLE - A device for generating electric power of a traction system of a motor vehicle powered by a battery, including a first rectifier stage configured to be connected to a power supply network or to a load to be powered, a second inverter stage configured to be connected to the battery, a mechanism regulating average current flowing between the first stage and the second stage, and a controller controlling a transfer of electric power between the power supply network and the battery or the powering of a load. | 2011-10-20 |
20110254495 | Method and Apparatus for Characterizing and Enhancing the Dynamic Performance of Machine Tools - Disclosed are various systems and methods for assessing and improving the capability of a machine tool. The disclosure applies to machine tools having at least one slide configured to move along a motion axis. Various patterns of dynamic excitation commands are employed to drive the one or more slides, typically involving repetitive short distance displacements. A quantification of a measurable merit of machine tool response to the one or more patterns of dynamic excitation commands is typically derived for the machine tool. Examples of measurable merits of machine tool performance include dynamic one axis positional accuracy of the machine tool, dynamic cross-axis stability of the machine tool, and dynamic multi-axis positional accuracy of the machine tool. | 2011-10-20 |
20110254496 | Method and Apparatus for Characterizing and Enhancing the Functional Performance of Machine Tools - Disclosed are various systems and methods for assessing and improving the capability of a machine tool. The disclosure applies to machine tools having at least one slide configured to move along a motion axis. Various patterns of dynamic excitation commands are employed to drive the one or more slides, typically involving repetitive short distance displacements. A quantification of a measurable merit of machine tool response to the one or more patterns of dynamic excitation commands is typically derived for the machine tool. Examples of measurable merits of machine tool performance include workpiece surface finish, and the ability to generate chips of the desired length. | 2011-10-20 |
20110254497 | ACTUATOR - An actuator includes an electrolyte membrane, first and second driving electrodes that are disposed on the opposite surfaces and that give a potential difference to the electrolyte membrane, a sensor that is formed on the electrolyte membrane and that detects a force acting on the electrolyte membrane, and a driving control circuit that supplies a drive voltage to the first and second driving electrodes on the basis of an instruction signal and a detection output of the sensor. The driving control circuit applies a PWM drive voltage with a duty ratio corresponding to a difference between the instruction signal and the detection output of the sensor across the first driving electrode and the second driving electrode. | 2011-10-20 |
20110254498 | Constant-Speed Control Circuit for BLDC Motors - A speed-control circuit for a BLDC motor is provided. The speed-control circuit includes a pulse generator, a current source circuit, a filter circuit, an error amplification circuit and a PWM circuit. The pulse generator detects a speed signal of the BLDC motor to generate a pulse signal. The filter circuit is coupled to the current source circuit to generate an average signal. The error amplification circuit receives the average signal and a speed-reference signal for generating a speed-control signal. The PWM circuit generates a switching signal to drive the BLDC motor in response to the speed-control signal. A pulse width of the switching signal is determined by the speed-control signal. | 2011-10-20 |
20110254499 | Charge circuit for battery cells - A device for charging a battery system having a number of individual voltage sources situated in a series circuit is provided, which device uses a voltage source and a respective bypass associated with each of the individual voltage sources. A charge current I | 2011-10-20 |
20110254500 | CAR CHARGER - A car charger which has a charge circuit, a shell, an anode conduction section, a cathode conduction section, an operation section, and a connection interface is disclosed. The operation section may selectively collect the anode and cathode conduction sections within a container space of the shell by the manner selected from folding and rotating. Thus, convenience of carrying the car charger may be improved. | 2011-10-20 |
20110254501 | PORTABLE ELECTRONIC APPARATUS AND CHARGING APPARATUS - A portable electronic device including a battery, a direct current (DC) power source, a first device that consumes a first amount of power during operation, a second device that consumes a second amount of power during operation, the second amount of power being more than the first amount of power, a first switch provided in a charging path between the DC power source and the battery, a second switch provided in a path for supplying power from the battery to the second device, and a charging control circuit that controls charging the battery by connecting the first switch when external power is supplied via the DC power source, and control the second switch to be connected and the first switch to be disconnected when the second device is operated during the charging. | 2011-10-20 |
20110254502 | FAULT-TOLERANT BATTERY MANAGEMENT SYSTEM, CIRCUITS AND METHODS - A fault tolerant battery management system includes redundancy, with applications including electric vehicles. Portions of its circuitry are constituted in distinct fault domains with control, monitoring, and balancing of cells circuitry fault-effect-isolated from the circuitry associated with built-in real-time testing. Built-in tests are orchestrated in fault domains isolated from the functional circuitry being verified. These built-in tests provide test stimulus unique for each cell measurement. Cell balancing is performed in a fault tolerant manner. It takes at least two independent faults, in two mutually distinct fault domains, to negatively affect balancing capability or to interfere with a redundant circuit's ability to operate. The built-in tests allow operation without the requirement for data cross-compare between redundant measuring electronic elements. Testing and balancing functions are interlocked through encoded enabling methodologies and transmit enables on serial buses. The circuitry is divided into mutually fault-isolated modules, each responsible for a subset of the cells. | 2011-10-20 |
20110254503 | WIRELESS POWER ANTENNA ALIGNMENT ADJUSTMENT SYSTEM FOR VEHICLES - Exemplary embodiments are directed to wireless charging and wireless power alignment of wireless power antennas associated with a vehicle. A wireless power charging apparatus includes an antenna including first and second orthogonal magnetic elements for detecting a horizontal component of a magnetic field generated from a second charging base antenna. A processor determines a directional vector between the antennas. | 2011-10-20 |
20110254504 | AUTOMATED ELECTRIC VEHICLE CHARGING SYSTEM AND METHOD - A system and method for charging an electric vehicle includes identifying vehicle information corresponding to the electric vehicle based on an electronic image of the electric vehicle, retrieving from an electronically stored database a location of a charging port on the electric vehicle based on the vehicle information, and robotically moving a charging connector according to the retrieved location to engage the charging port of the electric vehicle to charge a battery. | 2011-10-20 |
20110254505 | ELECTRICAL ENERGY CHARGING SYSTEM AND METHOD FOR CHARGING A VEHICLE - The invention relates to an electrical energy charging system for a vehicle comprising a charging station ( | 2011-10-20 |
20110254506 | HOUSING CONFIGURATION FOR CHARGER PLUG - A reduced plug-size charger plug for power conversion is disclosed utilizing a pair of blades that are slidably mounted into a charger housing, obviating the need for insertion molding. To promote and maintain electrical contact while minimizing package size and charger plug cost, a pair of spring contacts are provided for electrically connecting the blades with internal circuitry. | 2011-10-20 |
20110254507 | CHARGING DEVICE AND CHARGING METHOD - A charging device for charging a first battery cell and a second battery cell comprises a node, a control circuit, a charging circuit and a current-dividing unit. The control circuit is coupled to the charging circuit, the current-dividing unit, and the first and second battery cells. The control circuit controls the charging circuit to provide a first charge current or a second current for the node which couples to the first battery cell and the current-dividing unit and controls the state of the current-dividing unit. The current-dividing unit is set to share the current flowing into the node and acts as an open circuit in a first state and a resistor of finite resistance in a second state. | 2011-10-20 |
20110254508 | BATTERY PACK AND BATTERY PACK SYSTEM - A battery pack usable as a power source of an electric device, is disclosed, in which battery modules are in series; each battery module is configured to include battery cells in series; a discharge controller controls discharge power which is supplied from the battery modules to the electric device; a modulator modulates a voltage of each module between a high voltage and a low voltage which is higher than zero and lower than the high voltage; the high voltage and the low voltage are set to allow a load device of the electric device to operate by the high voltage, and to allow the load device not to operate by the low voltage; and the discharge controller operates by the battery modules, irrespective of whether each module outputs the high voltage or the low voltage. | 2011-10-20 |
20110254509 | Flexible Cathodes - This disclosure relates to methods of making a cathode for a lithium batter. The batterys include: (a) treating a cathode current collector with flame or corona; (b) coating a slurry containing iron disulfide, a first solvent, and a binder onto the cathode current collector obtained from step (a) to form a coated cathode current collector, in which the slurry contains about 73-75% by weight solids and the binder contains a polymer selected from the group consisting of linear di- and tri-block copolymers, linear tri-block copolymers cross-linked with melamine resin, ethylene-propylene copolymers, ethylene-propylene-diene terpolymers, tri-block fluorinated thermoplastics, hydrogenated nitrile rubbers, fluoro-ethylene-vinyl ether copolymers, thermoplastic polyurethanes, thermoplastic olefins, and polyvinylidene fluoride homopolymers; and (c) drying the coated cathode current collector obtained from step (b) to provide a cathode, in which the cathode contains no more than 0.5% by volume of the first solvent and is capable of being bent to 180°. This disclosure also relates to methods of making a lithium battery. | 2011-10-20 |
20110254510 | INTERMITTENTLY OUTPUTTED POWER SUPPLY SYSTEM - An intermittently outputted power supply system is disclosed. The system comprises: a power input unit, a charging control circuit unit, an energy-storing unit, a discharging control circuit unit, and a power output unit. The charging control circuit unit receives a first power input through the power input unit, and charges the energy-storing unit continuously. Thus, the capacity of the energy-storing unit increases. The discharging control circuit unit converts the energy stored in the energy-storing unit into a second power and transmitted to the power output unit in such a manner of discharging intermittently, to charge the electric device being connect with the power output unit. | 2011-10-20 |
20110254511 | PORTABLE ELECTRONIC DEVICE POWER MANAGER WITH CURRENT LIMIT FEEDBACK CONTROL LOOP MODIFICATION FOR STABILIZING AN EXTERNAL POWER SUPPLY - A portable electronic device has a battery to provide power to operate the device, a connector including a power supply pin to be coupled to an external power supply, and a power manager having a battery charger circuit that draws power through the power supply pin to charge the battery. The power manager has a current limit feedback control loop that limits the drawn current in accordance with a predetermined output current rating of the external power supply. The power manager automatically changes the behavior of its control loop to stabilize operation of the coupled external power supply. Other embodiments are also described and claimed. | 2011-10-20 |
20110254512 | TRICKLE CHARGER FOR HIGH-ENERGY STORAGE SYSTEMS - A voltage converter for charging an energy storage module from an alternating current line voltage, includes a first charging stage, coupled to the energy storage module, converting the line voltage to a first rectified direct current module charging voltage communicated to the energy storage module, the first rectified direct current module charging voltage greater than the line voltage, the first charging stage including an inductance for communicating a first charging current to the energy storage module; a second charging stage, switchably coupled serially with the first charging stage, down-converting the alternating current line voltage to a second rectified direct current module voltage, the second rectified direct current module voltage less than the first rectified direct current module charging voltage, wherein the second charging stage produces a second charging current not greater than the first charging current; and a controller for selectably switching the second charging stage serially with the first charging stage when the line voltage has a peak value greater than a predefined relationship to a voltage of the energy storage module wherein the second charging stage communicates the second charging current to the energy storage module through the inductance. | 2011-10-20 |
20110254513 | HYBRID WORKING MACHINE HAVING BATTERY PROTECTING FUNCTION - Provided is a hybrid working machine capable of performing battery charging control both for a working period and a standby period. The hybrid working machine includes a hydraulic actuator, an engine, a hydraulic pump driven by the engine to supply hydraulic fluid to the hydraulic actuator, a battery, a generator motor connected to the engine to serve as a generator by an output power of the engine to charge the battery and serve as a motor for assisting the engine by supply of an electric power from the battery, a battery monitor detecting a battery SOC, a controller which controls a charging power of the battery depending on the battery SOC, and a working state detector detecting a working state as information for discriminating between a working period during which the hydraulic actuator is actuated and a standby period during which the hydraulic actuator is not actuated. The controller limits the charging power in the standby period in comparison with in the working period. | 2011-10-20 |
20110254514 | LOW POWER CONVERSION AND MANAGEMENT OF ENERGY HARVESTING APPLICATIONS - A method and apparatus for low voltage conversion and energy storage uses a charge pump array including a first set of capacitors in parallel with a second set of capacitors and switches for selectively coupling the first and second set of capacitors to a variable input DC voltage. A data processor programmably controls one or more of the switches to couple the first and second set of capacitors to the variable input DC voltage for a variable first time period during which the input DC voltage charges the first and second set of capacitors to a DC voltage level. An energy storage device is switchably coupled to an output of the charge pump array. The data processor programmably controls one or more of the switches to couple the charge pump array output to the energy storage device for a variable second time period during which a voltage stored across each of the capacitors during the first time period is combined to produce a higher voltage significantly higher than the input DC voltage, the higher voltage being provided to the energy storage device. | 2011-10-20 |
20110254515 | CHARGE CONTROL DEVICE - A charge control device of the disclosure including a charger to perform a constant current charge control to maintain a charge current to an electric double-layer capacitor as a predetermined charge current value for a constant current charge period after a beginning of a charge of the electric double-layer capacitor. | 2011-10-20 |
20110254516 | Automatic Detection Method and Apparatus for Rotor Initial Position Angle of Double-Fed Machine - An automatic detection method and apparatus for a rotor initial position angle of a double-fed machine ( | 2011-10-20 |
20110254517 | SELF-EXCITED REACTIVE POWER COMPENSATION APPARATUS - A control device of a self-excited reactive power compensation apparatus controls a reactive current output from a self-excited converter to a power system. The control device includes a first reference generating unit, a second reference generating unit, and a selecting unit. The first reference generating unit generates a first voltage reference of an output voltage output from the self-excited converter, such that the reactive current detected by a reactive current detecting unit follows a current reference. The second reference generating unit generates a second voltage reference of the output voltage output from the self-excited converter, such that a value of the reactive current becomes a predetermined value. The selecting unit selects a maximum value from the first and second voltage references. | 2011-10-20 |
20110254518 | STATIC VAR COMPENSATOR APPARATUS - A one-phase static var compensator apparatus includes a compensator string consisting of a first static var compensator connected serially to a thyristor valve. The compensator string is arranged to be connected on its first end to one phase of a transmission grid of a rated voltage exceeding 69 kV. Moreover, the thyristor valve includes a plurality of thyristors connected serially and the compensator string is arranged to be directly connected to the transmission grid. A corresponding three phase apparatus is also presented. | 2011-10-20 |
20110254519 | ULTRASONIC GENERATOR AND PROGRAM WRITING METHOD - An ultrasonic generator is provided, in which the control system can easily be changed in accordance with a cleaning application and a cleaning process. The ultrasonic generator according to the present invention, which causes an ultrasonic transducer to oscillate a signal for ultrasonic vibration, includes a programmable multiple control circuit having a signal generation circuit for generating a signal, and an output adjustment circuit for adjusting the output of the signal from the programmable multiple control circuit, wherein the programmable multiple control circuit has a power control circuit electrically connected to the output adjustment circuit, a phase comparison circuit electrically connected to the output adjustment circuit, a frequency control circuit electrically connected to the phase comparison circuit, and a signal modulation circuit electrically connected to the frequency control circuit via the signal generation circuit. | 2011-10-20 |
20110254520 | CONTROLLERS, SYSTEMS AND METHODS FOR IMPLEMENTING MULTI-PHASE CONTROL - A controller includes an input selector, multiple cores and a multiplexer. The multiplexer is operable for multiplexing control signals to multiple output channels to provide multiple output signals. Each output channel can output a respective output signal, and each output signal represents a cyclic rotation of the control signals. The input selector is operable for enabling the cores to operate in a standby state alternately to control a multiplexing sequence of the control signals. | 2011-10-20 |
20110254521 | FLOATING-GATE PROGRAMMABLE LOW-DROPOUT REGULATOR AND METHODS THEREFOR - In an embodiment, a low-dropout (LDO) regulator includes at least one of a programmable voltage reference and a programmable frequency compensation circuit and is configurable to produce an output voltage. The programmable voltage reference includes a floating-gate transistor coupled to a reference output and configurable for providing a reference voltage to an input of an error amplifier. The programmable frequency compensation circuit is responsive to a programmable current reference circuit that includes at least one floating-gate transistor that is configurable to adjust a frequency compensation parameter. A control circuit is provided to selectively program floating gates of the floating gate transistors to adjust the output voltage and/or to adjust a frequency component of the output voltage. | 2011-10-20 |
20110254522 | STANDBY POWER SUPPLY CIRCUIT - A standby power supply circuit includes a pulse width modulation controller, first to fourth metal-oxide-semiconductor field effect transistors (MOSFETs), and an inductor. A gate of the first MOSFET and a gate of the second MOSFET are connected to a first and a second general purpose terminals of a power management chip, respectively. A drain of the first MOSFET is connected to a source of the third MOSFET. A gate of the fourth MOSFET is connected to a lower gate terminal of the controller. A phase terminal of the controller is grounded via the inductor and a capacitor in series. The drain of the second MOSFET is connected to a node between the inductor and the capacitor via a resistor. | 2011-10-20 |
20110254523 | POWER SOURCE CIRCUIT - An object is to reduce degradation of circuit operation and to reduce the area of the entire circuit. A power source circuit is provided with a first terminal to which first voltage is input; a second terminal to which second voltage is input; a comparator being connected to the first terminal and the second terminal and comparing the first voltage and the second voltage; a digital circuit averaging, integrating, and digital pulse width modulating a first digital signal output from the comparator; a PWM output driver amplifying a second digital signal output from the digital circuit; and a smoothing circuit smoothing the amplified second digital signal. | 2011-10-20 |
20110254524 | CURRENT DRIVER CIRCUIT - In order to provide a current driver circuit capable of achieving a stable operation without feeding a load current back, a current driver circuit of the present invention includes: a converter part ( | 2011-10-20 |
20110254525 | DIMMING CONTROL FOR A SWITCHING POWER SUPPLY - A controller for dimming control of a switching power supply includes a phase angle measurement block and a drive logic block. The phase angle measurement block is to be coupled to receive an input sense signal. The phase angle measurement block generates a phase angle signal representative of a phase angle of an input voltage of the power supply in response to the input sense signal. The drive logic block is to be coupled to control switching of a switch included in the power supply. The drive logic block controls the switch in a closed loop dimming control when the phase angle is less than or equal to a phase threshold and in a open loop dimming control when the phase angle is greater than the phase threshold. | 2011-10-20 |
20110254526 | Voltage Regulator with Optimal Efficiency Selection and a Master-Slave Zero Cross Detection Configuration - A voltage regulator includes a first phase power stage, a second phase power stage, and a controller. The first phase power stage includes a zero cross detection circuit configured to measure a current level for the first phase power stage, and to cause a diode emulation state in the first phase power stage when the current level is substantially equal to zero. The second phase power stage is in communication with the zero cross detection circuit, and configured to enter the diode emulation state in response to receiving a signal from the zero cross detection circuit. The controller is coupled to the first phase power stage and to the second phase power stage. The controller is configured to measure an output current of the voltage regulator and to activate the second phase power stage when the output current is above a first threshold current level. | 2011-10-20 |
20110254527 | ANALOG CURRENT OUTPUT CIRCUIT - In the analog current output circuit according to the present invention, a rising start position and a tilt of an internal control voltage are set such that it crosses, at the maximum of an analog output current, a load end voltage obtained when the resistance of a load is the one near the center of a specification range. According to a comparison result in a comparator, a switch causes a DC/DC converter to input a high reference voltage and causes an output transistor to output a high power supply voltage when the internal control voltage is smaller than the load end voltage and causes the DC/DC converter to input a low reference voltage and causes the output transistor to output a low power supply voltage when the internal control voltage is larger than the load end voltage. | 2011-10-20 |
20110254528 | MULTI-MODULE BIDIRECTIONAL DC-DC CONVERTER - A multi-module bidirectional power converter may comprise a low side common node, a high side common node and at least first and second bidirectional DC/DC converter modules. The modules may comprise first and second low voltage switches, first and second high voltage switches and a transformer. The transformer may comprise a low side winding having first and second legs and a high side winding having first and second legs. The first leg of the low side winding may be connected with the first and second low voltage switches of the module. The second leg of the low side winding may be connected with the low side common node of the multi-module bidirectional power converter. The first leg of the high side winding may be connected with the first and second high voltage switches of the module. The second leg of the high side winding may be connected to the high side common node of the multi-module bidirectional power converter. Such an arrangement may provide operability of the multi-module bidirectional power converter with any one or more of the modules so that efficiency is maintained when electrical loads are high and so that Zero Voltage Switching is maintained when electrical loads are low. | 2011-10-20 |
20110254529 | VOLTAGE CONVERTER - A voltage converter comprises at least two capacitive charge pump stages, each comprising a capacitor, a charging switch through which a capacitor charging current is adapted to flow, and a control circuit for controlling the charging switch.
| 2011-10-20 |
20110254530 | FAULT PROTECTED CURRENT SOURCE FOR LIGHTING ELEMENT TESTING - A fault protected current source is provided that can be used to safely drive LEDs in reliability test systems. The current source is includes circuits and processes that detect the common faults found in LED reliability test systems. After a fault is detected, the current source shuts down drive before destructive spikes are produced. Because only true LED failures are counted, this fault protected current source can be used to construct reliability test systems that produce more accurate reliability test data. | 2011-10-20 |
20110254531 | Current Balancing Multiphase Power Converters, Controllers and Methods - A method of controlling a multiphase power converter including a plurality of sub-converters is disclosed. The method includes, for each of the sub-converters, estimating a current provided by that sub-converter. The method includes selecting one of the sub-converters that is on and determined to have a greatest current as the next sub-converter to be turned off and selecting one of the sub-converters that is off and determined to have a smallest current as the next sub-converter to be turned on. Other methods, multiphase power converters and controllers for multiphase power converters are also disclosed. | 2011-10-20 |
20110254532 | METHOD ALLOWING THE DETECTION AND DISPLAY OF OBJECTS LOCATED BEHIND AN OBSCURING SURFACE - A handheld device providing an internal view through an obscuring wall or other obscuring surfaces of hidden structural or facilities elements (such as wooden studs, electrical, plumbing, or HVAC), or the absence thereof. A continuous and homogeneous luminescent gas or other visual display material whose optical characteristics change as a result of the applied electric field is used both to simultaneously detect capacitance changes associated with hidden objects and to display those detected those objects. Different types of chambers are disclosed for the gas as well as means to prevent fringing effects. The gas is held just at its ionization level at which point it becomes optically visible. Circuitry is disclosed for controlling the energy source based on current draw or light output of the gas and feedback circuitry is disclosed to neutralize the effects of ambient light. Also disclosed is a device and method for the detection and mapping of electric fields. | 2011-10-20 |
20110254533 | Coaxial Illumination Of Coulter Aperture In Full Function Hematology Analyzer - A method for directly illuminating a Coulter aperture so light scattering can be incorporated into the classical Coulter aperture and 3-diff blood analyzer to realize full functional hematology analyzer by providing a flow chamber which is separated into two portions by a plate having a Coulter aperture; and using a light source to directly coaxial illuminate the Coulter aperture wherein the illuminating beam propagates in the same direction as the axis of the Coulter aperture and the cell's moving direction. | 2011-10-20 |
20110254534 | NON-CONTACT ARC DETECTION APPARATUS AND METHOD - The present invention relates to a non-contact arc detection, recognition, and warning apparatus for the detection of arcing in an electrical system. The apparatus includes an electric field detector having first and second electric field sensors adapted to sense electric fields; a magnetic field detector having a multi-axis magnetic field sensor adapted to detect a magnetic field; and a digital signal processor. The digital signal processor compares and enhances signals obtained from the electric field detector and the magnetic field detector and creates a response to alert a user of the presence of arcing. | 2011-10-20 |
20110254535 | METHOD AND SYSTEM FOR MONITORING EXTERNAL EXCITATION ON A SURFACE USING NANOCOMPOSITE PAINT - The present invention provides a method and system for monitoring external excitation on a surface using nanocomposite paint. The method comprises applying the nanocomposite paint on the surface, wherein the nanocomposite paint comprises a mixture of a plurality of carbon nanotubes and an epoxy resin along with a plurality of electrically conductive patterned electrodes. The electrical properties of the nanocomposite paint changes in response to the external excitation of the surface. The change in the electrical properties of the nanocomposite is measured by a measuring instrument, wherein the change in the electrical properties of the nanocomposite paint is directly proportional to the external excitation experienced by the surface. | 2011-10-20 |
20110254536 | MEASUREMENT ARRANGEMENT HAVING A CALIBRATION SUBSTRATE AND ELECTRONIC CIRCUIT - A calibration substrate having at least one calibration standard with at least two electrical connection points, each for one measurement gate of a vector network analyzer. At least one electrical connection point is formed of at least one calibration standard having a switch, wherein the switch has a first electrical contact electrically connected to an electrical connection point of the calibration standard, a second electrical contact designed for electrically connecting to a measurement gate of the vector network analyzer, and a third electrical contact, wherein the switch is designed such that an electrical contact is established either between the first and third electrical contact or between the first and second electrical contact. | 2011-10-20 |
20110254537 | Method and Apparatus for Detecting CCM Operation of a Magnetic Device - A method and an apparatus for detecting a CCM operation of a magnetic device are developed. The method generates a current signal in accordance with a switching current of the magnetic device and generates a first current signal and a second current signal by sampling the current signal. A mode signal is further generated according to the first current signal and the second current signal. The mode signal indicates the magnetic device is operated in CCM or DCM. The apparatus comprises a first sample circuit, a second sample circuit, and an arbiter. The first sample circuit samples the current signal to generate the first current signal. The second sample circuit samples the current signal to generate the second current signal. The arbiter generates the mode signal according to the first current signal and the second current signal for indicating the magnetic device is operated in CCM or DCM. | 2011-10-20 |