Patent application number | Description | Published |
20080257653 | Electromagnet and Elevator Door Coupler - An elevator door assembly ( | 10-23-2008 |
20080271955 | Elevator Door Lock Sensor Device - An elevator door lock assembly ( | 11-06-2008 |
20080271958 | Elevator Door Lock - An elevator door lock includes a locking member ( | 11-06-2008 |
20080271959 | Electromagnetically Operated Elevator Door Lock - An electromagnetic door lock assembly ( | 11-06-2008 |
20090079200 | Electromechanical Energy Harvesting System - An ambient energy harvesting system, and method of use thereof, includes a magnetic flux-generating assembly ( | 03-26-2009 |
20090096230 | Vacuum Pressure Systems - Vacuum pressure systems are provided. In this regard, a representative vacuum pressure system includes: an inlet; and a linear actuator having a permanent magnet, a coil, an inner ferromagnetic core and an outer ferromagnetic core, the outer ferromagnetic core surrounding at least a portion of each of the permanent magnet, the coil, and the inner ferromagnetic core; the linear actuator being operative to exhibit relative motion between the permanent magnet and the coil responsive to an electrical current being applied to the coil such that the linear actuator forms vacuum pressure and draws fluid into the inlet. | 04-16-2009 |
20090187326 | ELECTRIC MOTOR FOR FUEL PUMP WITH IMPROVED SHUTDOWN FEATURES - An electric motor for a fuel pump is provided with a shutdown switch positioned intermediate an inverter, and its control coil. In this location, the shutdown function can be achieved without heavy components. In another feature, when the fuel pump is shut down, a signal is sent upstream to a voltage regulator associated with a generator, such that the voltage supplied downstream by the generator can be reduced to eliminate any potential voltage spike due to the shutdown of the electric motor. The electric motor with shutdown switch enables low weight fault tolerant flux regulated machines. | 07-23-2009 |
20090251020 | Permanent magnet dynamoelectric machine with variable magnetic flux excitation - A permanent magnet (PM) dynamoelectric machine with directly controllable field excitation control comprises: a drive shaft; a PM rotor assembly with multiple PMs arranged around an outer axial periphery of the rotor assembly; a stator assembly comprising a ferromagnetic stator yoke, multiple ferromagnetic stator teeth mounted to the stator yoke with distal ends proximate the outer axial periphery of the rotor assembly separated by an air gap and multiple stator coils mounted between the stator teeth; multiple saturable ferromagnetic shunts, each shunt coupling adjacent distal ends of the stator teeth to shunt air gap magnetic flux Φ | 10-08-2009 |
20090251112 | Permanent magnet electric generator with variable magnet flux excitation - A permanent magnet (PM) electric generator with directly controllable field excitation control comprises: a drive shaft; a PM rotor assembly with multiple PMs arranged around an outer axial periphery of the rotor assembly; a stator assembly comprising a ferromagnetic stator yoke, multiple ferromagnetic stator teeth mounted to the stator yoke with distal ends proximate the outer axial periphery of the rotor assembly separated by an air gap and multiple stator coils mounted between the stator teeth; multiple saturable ferromagnetic shunts, each shunt coupling adjacent distal ends of the stator teeth to shunt air gap magnetic flux Φ | 10-08-2009 |
20090256511 | Direct Flux Regulated Permanent Magnet Brushless Motor Utilizing Sensorless Control - A permanent magnet rotor for use in a flux regulated permanent magnet brushless machine is constructed such that the inductance along the direct and quadrature axes is markedly different to provide sensorless position feedback for the rotor. | 10-15-2009 |
20090314588 | ELECTROMAGNET AND ELEVATOR DOOR COUPLER - An electromagnetic coupling device includes a vane member and an electromagnet. The electromagnet includes a core having a plurality of poles comprising at least four poles. An electrically conductive winding has a first portion surrounding a first one of the poles and a second portion surrounding a second one of the poles. The winding is selectively energized for selectively magnetically coupling the electromagnet and the vane member such that the vane member and the electromagnet are movable together in a desired direction. | 12-24-2009 |
20100034003 | Electric Power Generation and Conversion with Controlled Magnetics - A power conversion system comprises: a source of multiphase high frequency alternating current (AC) electrical input power; a high frequency controlled magnetics transformer for each phase of the multiphase high frequency AC input power, with each transformer having a primary winding coupled to its respective phase of the multiphase high frequency AC input power, at least one secondary winding that produces high frequency AC output power and at least one control winding responsive to a direct current (DC) control signal that changes the high frequency output power in proportion to the amplitude of the DC control signal; a power converter that receives the multiphase high frequency AC output power from each high frequency transformer secondary and converts it to system output power without the high frequency AC content; and a system controller responsive to the system output power that produces a DC control signal for each control winding that changes in amplitude in response to changes in a measured parameter of the system output power. | 02-11-2010 |
20100038187 | ELECTROMAGNETIC COUPLING WITH A SLIDER LAYER - An exemplary electromagnetic coupling device includes an electromagnet and a vane member that is selectively magnetically coupled with the electromagnet. A non-magnetic slider layer is supported on one of the electromagnet or the vane member such that the slider layer is between the electromagnet and the vane member. The slider layer maintains a spacing between the electromagnet and the vane member. In a disclosed example, the electromagnetic coupling device is used for coupling an elevator car door to a hoistway door for moving the doors in unison between open and closed positions. | 02-18-2010 |
20100045222 | DIRECT FLUX REGULATED PERMANENT MAGNET BRUSHLESS MOTOR UTILIZING SENSORLESS CONTROL BY DC AND AC EXCITATION - A flux regulated permanent magnet brushless motor has a stator having an inner peripheral bore. A permanent magnet rotor is mounted within the inner peripheral bore. A control winding is supplied to a DC current to regulate flux of the machine. A small AC current is also supplied and an output is sensed to determine a position of the permanent magnet rotor. | 02-25-2010 |
20100052467 | Transverse flux machine - A transverse flux machine (TFM) includes a stator assembly that provides a plurality of U-shaped magnetic circuits placed circumferentially around a rotor assembly. The plurality of U-shaped magnetic circuits being comprised of a first stator segment, a second stator segment, and a plurality of stator yokes. The first stator segment and the second stator segment each have a plurality of poles spaced around a first circumference and a plurality of slots spaced around a second circumference opposite each of the plurality of poles. The plurality of stator yokes each have a first end sized to fit within one of the slots associated with the first stator segment and a second end sized to fit in one of the slots associated with the second stator segment. Positioning of the first and second ends of the stator yokes within the slots of the first and second stator segments, respectively, results in the creation of the plurality of U-shaped magnetic circuits, each magnetic circuit defined by one of the plurality of poles associated with the first stator segment, one of the yokes, and one of the plurality of poles associated with the second stator segment. | 03-04-2010 |
20100181969 | VOLTAGE REGULATED PERMANENT MAGNET GENERATOR - A single phase AC generator uses a rotor contained within a stator. The stator has an armature winding and a control winding which is capable of having its magnetic permeability adjusted, thereby limiting the output voltage of the armature winding. The stator additionally has two core sections. | 07-22-2010 |
20100247397 | MAGNETIC COUPLING DEVICE FOR AN ELEVATOR SYSTEM - A catalyst-carrier supporting material of a catalytic converter excellent in heat resistance and capable of maintaining a sufficient holding capability for supporting the catalyst-carrier for a long duration even in the environments exceeding 950° C. The catalyst-carrier supporting material comprising: a heat resistant layer which contains crystalline alumina fibers and an organic binder evenly impregnated with the crystalline alumina fibers and to be eliminated by thermal decomposition; and a thermally intumescent layer layered on the heat resistant layer which contains crystalline alumina fibers, an organic binder dispersed in the crystalline alumina fibers and to be eliminated by thermal decomposition, and vermiculite dispersed in the crystalline alumina fibers, wherein the crystalline alumina fibers exist in an amount of 1,400 g/m2 or higher in the catalyst-carrier supporting material, the ratio of the amount of the crystalline alumina fibers existing in the heat resistant layer and the amount of the crystalline alumina fibers existing in the thermally intumescent layer is 0.98 to 1.98, and the vermiculite exists in an amount of 23 to 33% by weight in the thermally intumescent layer. | 09-30-2010 |
20100283415 | Motor Drive System with Flux Regulated PM Generator - A method of generating and controlling power for an alternating current (AC) motor by means of at least one controlled permanent magnet machine (PMM) with a permanent magnet (PM) rotor and a stator with a magnetic flux diverter circuit for controlling the output of the PMM, comprises the steps of: rotating the PM rotor at a velocity sufficient to develop a high frequency alternating current (HFAC) power output from the stator; transforming the HFAC output to produce a variable low frequency alternating current (AC) motor control output for the motor; sensing desired motor control parameters; generating a control signal responsive to the sensed parameters; and applying the control signal to the magnetic flux diverter circuit to control the motor control output. | 11-11-2010 |
20100295517 | POWER GENERATING SYSTEM WITH FLUX REGULATED GENERATOR - A method for generating and controlling power by means of at least one controlled permanent magnet machine (PMM) with a permanent magnet (PM) rotor and a stator with a magnetic flux diverter circuit for controlling the output of the PMM, comprises the steps of: rotating the PM rotor at a velocity sufficient to develop a high frequency alternating current (HFAC) power output from the stator; transforming the HFAC output to produce a desired non-HFAC power output; sensing desired power output parameters; generating a control signal responsive to the sensed parameters; and applying the control signal to the magnetic flux diverter circuit to control the desired power output. | 11-25-2010 |
20110031841 | Permanent Magnet Brushless Machine with Magnetic Flux Regulation - A permanent magnet machine (PMM) comprises: a generally cylindrical permanent magnet (PM) rotor that comprises multiple PM rotor poles arranged around a rotor axis of rotation; and a stator with two generally cylindrical and concentric yokes, an inner yoke proximate the PM rotor with associated multiple inner poles and inner armature windings suitable for multiphase alternating current operation that form a PMM magnetic flux circuit, an outer yoke with associated multiple outer poles and outer control windings suitable for connection to a direct current source, with distal ends of the outer poles in contact with the inner yoke to form an external magnetic flux circuit that diverts magnetic flux from the PMM magnetic flux circuit; wherein application of increasing direct current to the outer windings results in increased magnetic reluctance of the external magnetic flux circuit, thereby causing the external magnetic flux circuit to divert less magnetic flux from the PMM magnetic flux circuit. | 02-10-2011 |
20110062280 | ELECTROMAGNETIC LANDING GEAR BRAKES - An electromagnetic control for the landing gear of an aircraft includes a hub to be fixed to a frame of an aircraft landing gear. A rotor rotates with a tire on the aircraft landing gear. Permanent magnetic disks are associated with the rotor, and interspersed with disks on the hub. Some of the disks on the hub are electromagnetic disks supplied with electric power, and some of the plurality of disks on the hub are made of high electric conductivity material. | 03-17-2011 |
20110062833 | TRANSVERSE REGULATED FLUX ALTERNATOR - An alternator has a rotor to be associated with a prime mover shaft and driven for rotation. The rotor is provided with permanent magnets. A stator has pole pieces, including a main winding and flux diverters separating the main winding from a control coil. Control is provided for controlling the power passing through the control coil. The alternator is a transverse flux machine. A vehicle power system including the alternator is also disclosed. | 03-17-2011 |
20110128707 | POWER SEMICONDUCTOR MODULE FOR WIDE TEMPERATURE APPLICATIONS - A power semiconductor module includes an insulating substrate with a conductive circuit layer attached to one side and a baseplate attached to the other side. A power semiconductor device is attached to the conductive circuit layer. The conductive circuit layer and the baseplate are formed of a material with a coefficient of thermal expansion less than about 8.0×10 | 06-02-2011 |
20110133485 | TRANSVERSE REGULATED FLUX MACHINE - A machine has a rotor to be associated with a shaft. The rotor is provided with permanent magnets. A stator has pole pieces, including a main winding and flux diverters separating the main winding from a control coil. Control is provided for controlling the power passing through the control coil. The machine is a transverse flux machine. The machine may be utilized as a generator, an electric motor, or for other application. | 06-09-2011 |
20110133703 | ARCHITECTURE FOR DUAL SOURCE ELECTRIC POWER GENERATING SYSTEM - A dual source electric power generating system (EPGS) provides both a regulated AC output and a regulated DC output. The EPGS includes a rotating portion and a stationary portion. The stationary portion includes a plurality of windings (permanent magnet generator (PMG) armature windings, an exciter field winding, and high-voltage main generator armature windings), a voltage regulator, a rectifier, an inverter, a point of regulation (POR) sensor. The high-voltage main generator armature windings generate a high-voltage AC that is converted to a regulated, high-voltage AC by the rectifier and the inverter. The stationary portion is further characterized by circuitry for producing the regulated DC output from AC voltage produced by a winding other than the high-voltage main generator armature windings. | 06-09-2011 |
20110169357 | COMPACT ELECTROMECHANICAL ACTUATOR - An electromechanical actuator for controlling the position of an aircraft component has a linear actuator to be driven to position a component. A transverse flux motor drives the linear actuator to move in a linear direction and control the position of the component | 07-14-2011 |
20110227340 | ELECTRICAL MACHINES WITH INTEGRATED POWER AND CONTROL AND INCLUDING A CURRENT SOURCE INVERTER - A machine has a housing that includes a plurality of stator coils to be positioned adjacent to a rotor. A switching network includes a plurality of transistors and diodes connected to the coils. A current source inverter is provided by a switching network, a pair of inductors positioned on power rails, and commutating capacitors. The current source inverter and the coils are all positioned within said housing. Power architecture for a vehicle has a source of DC power, which communicates with machines through integrated motor drives. The motor drives include at least three coils positioned adjacent to the rotors for a motor associated with the integrated motor drive. A storage switching network is positioned downstream of the coils, with the storage switching network to be closed to allow power from the coils to drive the rotor, or to be opened to allow power to pass to a local storage component. | 09-22-2011 |
20110227460 | PACKAGING IMPROVEMENT FOR CONVERTER-FED TRANSVERSE FLUX MACHINE - A transverse flux machine has at least three phases, each provided by a stator core and phase windings. Each of the at least three phases is captured within a common housing. Parallel lines extend from the at least three phases, and a current source converter is created on each of the parallel lines by inductors, a switching network, and communicating capacitors, which are received within the common housing. | 09-22-2011 |
20110309618 | ELECTROMECHANICAL ENERGY HARVESTING SYSTEM - A method of electromechanical energy harvesting includes sensing electrical current generated by relative movement of a coil and a magnetic flux source produced by movement of a cantilevered beam in response to ambient vibration energy, determining a vibration characteristic of the ambient vibration energy, and adjusting an effective flexible length of the cantilevered beam as a function of the vibration characteristic and the sensed electrical current. | 12-22-2011 |
20120093668 | RIM DRIVEN THRUSTER HAVING PROPELLER DRIVE MODULES - A rim driven thruster comprises an annular housing, a propulsor assembly, a magnetic rotor assembly and a stator assembly. The annular housing defines a flow path extending along an axis. The propulsor assembly is supported within the housing and comprises propeller blades extending radially from the axis of the flow path. The propeller blades are configured to rotate about the axis. The magnetic rotor assembly is mounted to radially outer ends of the propeller blades. The stator assembly comprises spaced propeller drive modules mounted to an inner circumferential surface of the annular housing. The propeller drive modules are configured to provide electromagnetic torque to the magnetic rotor assembly. | 04-19-2012 |
20120093669 | RIM DRIVEN THRUSTER HAVING TRANSVERSE FLUX MOTOR - A rim driven thruster comprises an annular housing, a propulsor assembly, a magnetic rotor assembly and a transverse flux stator assembly. The annular housing defines a flow path extending along an axis. The propulsor assembly is supported within the housing and comprises propeller blades extending radially from the axis of the flow path. The propeller blades are configured to rotate about the axis. The magnetic rotor assembly is mounted to radially outer ends of the propeller blades. The transverse flux stator assembly is mounted to the annular housing and is configured to provide electromagnetic torque to the magnetic rotor assembly. | 04-19-2012 |
20120163997 | VANE COMPRESSOR WITH INTEGRATED MOTOR - A rotor disk of a vane compressor includes a multiple of slots along an outer diameter and a multiple of magnets along an inner diameter. Each of the multiple of slots is radially aligned with one of the multiple of magnets. | 06-28-2012 |
20130009584 | VOLTAGE REGULATED PERMANENT MAGNET MACHINE - A permanent magnet generator comprises a stator core, a plurality of windings situated on the stator core, and a plurality of stress elements. The stress elements apply or relieve mechanical stress in response to control signals from a generator controller, thereby increasing or reducing voltage across the stator windings. | 01-10-2013 |
20130069477 | METHOD OF FABRICATION OF PERMANENT MAGNET MACHINES WITH MAGNETIC FLUX REGULATION - A method of forming a flux regulated machine includes winding stator windings into slots in an outer core. The outer core is formed to have a plurality of radially inwardly extending tooth pieces that are circumferentially spaced, and which define the slots. Further, control coils are wound around an inner core. Then, the inner core is inserted within the outer core such that the tooth pieces contact the inner core, and such that the control coils close off the slots at a radially innermost position. A flux regulated permanent magnet machine generally made according to this method is also disclosed. | 03-21-2013 |
20130127292 | ROTORS OF INDUCTION MOTORS - A rotor for an induction motor includes a rotor body, the rotor body defining a central cavity configured to receive a motor shaft and having a plurality of radial slots formed therethrough, each radial slot of the plurality of radial slots extends outward radially from the central cavity to an outer surface of the rotor body, a plurality of conductive bars arranged within the plurality of radial slots of the rotor body, wherein each conductive bar of the plurality of conductive bars extend outward radially within each radial slot from the central cavity to the outer surface of the rotor body, a first end ring arranged on the rotor body in electrical communication with each conductive bar of the plurality of conductive bars, and a second end ring arranged on the rotor body in electrical communication with each conductive bar of the plurality of conductive bars. | 05-23-2013 |
20130174533 | MAGNETICALLY COUPLED CONTRA-ROTATING PROPULSION STAGES - A turbomachine comprises a turbine shaft, first and second rotors, first and second propulsion stages, and a magnetic stator. The first rotor is rotationally coupled to the turbine shaft, and coaxially arranged along an axis. The first propulsion stage is rotationally coupled to the first rotor, opposite the turbine shaft. The second rotor is coaxially arranged about the first rotor, and the second propulsion stage is rotationally coupled to second rotor, opposite the turbine shaft and adjacent the first propulsion stage. The magnetic stator is coaxially arranged between the first rotor and the second rotor, forming a magnetic coupling between the and second rotors to drive the second propulsion stage in contra-rotation with respect to the first propulsion stage. | 07-11-2013 |
20130181562 | DUAL-ROTOR MACHINE - A dual rotor machine having a stator includes at least one excitation element, a first rotor located between the at least one excitation element and an axis, the first rotor configured to rotate about the axis, and a second rotor on the other side of the at least one excitation element from the axis, the second rotor configured to rotate about the axis. | 07-18-2013 |
20130193813 | INTEGRATED HIGH-VOLTAGE DIRECT CURRENT ELECTRIC POWER GENERATING SYSTEM - An integrated high-voltage direct current (HVDC) electric power generating system (EPGS) comprises a permanent magnet generator (PMG) including a PMG stator and a PMG rotor, wherein the PMG is disposed within a PMG housing. Also included is an armature winding operably connected to the PMG and a first rectifier for converting high-voltage AC from the armature winding, wherein the armature winding is in communication with a first boost inductor, wherein the armature winding, the first rectifier and the first boost inductor are each disposed within the PMG housing. The armature winding is operably connected to a second rectifier for converting high-voltage AC from the armature winding, wherein the armature winding is in communication with a second boost inductor, wherein the armature winding, the second rectifier and the second boost inductor are each disposed within the PMG housing. | 08-01-2013 |
20130264414 | COAXIAL CONTRA-ROTATING MOTORS FOR DIFFERENTIAL LANDING GEAR STEERING - A landing gear for an aircraft has a pair of spaced wheels, and a drive and steering arrangement operable to drive each of the wheels in either rotational direction. The drive and steering arrangement includes two permanent magnet rotors, with each of the permanent magnet rotors connected to rotate with one of the wheels. A single stator is positioned to drive both of the rotors. The drive and steering arrangement is mounted between the pair of wheels. | 10-10-2013 |
20130264415 | TRANSVERSE FLUX MACHINE UTILIZED AS PART OF A COMBINED LANDING GEAR SYSTEM - A landing gear for an aircraft has a set of axially spaced wheels rotatable about a common axis drive by a transverse flux drive. In another feature, a transverse flux drive includes a first rotor and a second rotor. One of the first and second rotors is positioned radially inwardly of the other. A single stator is positioned radially intermediate the first and second rotors. In another feature, a landing gear combination for use on an aircraft has a nose wheel assembly including at least one nose wheel to be associated with a nose cone on an aircraft. A main landing gear assembly is also associated with the aircraft. A transverse flux motor provides on-ground propulsion and/or braking to the aircraft. | 10-10-2013 |
20130278193 | DIRECT CURRENT GENERATING, MANAGEMENT AND DISTRIBUTION SYSTEM - A direct current generating, management and distribution system includes a first armature winding, a first active rectifier having a first controller and coupled to the first armature winding, a first direct current bus coupled to the first active rectifier, a second armature winding, a second active rectifier having a second controller and coupled to the second armature winding, a second direct current bus coupled to the second active rectifier, a unit controller coupled to the first and second controllers, a first set of switches coupled to the first direct current bus and to the unit controller, a second set of switches coupled to the second direct current bus and to the unit controller, a third switch coupled to the first direct current bus and to the unit controller and a fourth switch coupled to the second direct current bus and the unit controller. | 10-24-2013 |
20130293042 | AIR-COOLED ELECTRICAL MACHINE - An electrical machine, especially permanent magnet machine, is comprised of a stator and a rotor rotatable relative to the stator. The rotor and stator are separated from each other by an air gap. A boundary layer control maintains a desired boundary layer thickness in the air gap. The boundary layer control maintains optimal cooling, which minimizes the electrical machine's overall dimensions while maximizing its power density. | 11-07-2013 |
20130300243 | HIGH POWER DENSITY PERMANENT MAGNET MACHINE - A permanent magnet rotary machine includes a rotor and a plurality of circumferentially spaced permanent magnets spaced circumferentially about a rotational axis of the rotor. A stator is positioned adjacent the rotor, and includes a plurality of circumferentially spaced U-shaped cores. The U-shaped cores are provided with a separate coil. The cores are arranged such that at least three phases of electric power are created by three sets of the cores. | 11-14-2013 |
20130307447 | CURRENT CONTROL FOR AN ELECTRIC ACTUATOR - A controller for an electric actuator includes a reference model that generates position and speed reference signals in response to a position command signal and employs a feed forward model that accounts for dynamic loading of the electric actuator. The feed forward model receives the position and speed reference signals provided by the reference model, and in response generates feed forward signals that account for mechanical characteristics of the electric actuator. | 11-21-2013 |
20130308269 | METHOD OF CONVERTING POWER USING A POWER SEMICONDUCTOR MODULE - A method of converting power using a power semiconductor module includes conducting power to power semiconductor devices; converting the conducted power with the power semiconductor devices; conducting heat generated by the power conversion from the power semiconductor devices first through a conductive circuit layer, then through an insulating substrate, to a baseplate; and removing the heat from the baseplate. The conductive circuit layer and the baseplate are formed of a material with a coefficient of thermal expansion less than about 8.0×10 | 11-21-2013 |
20130320763 | DUAL GENERATOR SYSTEM - A dual generator system includes a main generator and an auxiliary generator. The main generator generates at least a first phase main output and a second phase main output. The auxiliary generator generates at least a first phase auxiliary output and a second phase auxiliary output, wherein the first phase auxiliary output is combined with the first phase main output to generate a first phase main output. An auxiliary generator control unit (AGCU) monitors the first phase combined output and the second phase combined output and in response independently regulates the first phase auxiliary output and the second phase auxiliary output. | 12-05-2013 |
20130325287 | FLYWHEEL ENERGY STORAGE FOR VEHICLE PROPULSION - A propulsion system includes a prime mover for providing primary power to propel a vehicle; a flywheel energy storage device for providing secondary power to propel the vehicle when primary power is not being provided, wherein the flywheel energy storage device stores power provided by the prime mover; and a controller for commanding the prime mover on and off. | 12-05-2013 |
20130325366 | ELECTRICAL POWER GENERATION AND DISTRIBUTION FAULT MANAGEMENT SYSTEM FOR A VEHICLE - An electric power system includes multiple components that include a generator, a rectifier and a power management and distribution center. Multiple sensors are configured to provide actual responses relating to each of the components. Multiple simulation models are configured to simulate responses of each of the components, and multiple comparators are configured to compare the actual responses to the simulated responses and provide compared values. A diagnostic module is in communication with the comparators and is configured to determine at least one fault in each of the components. | 12-05-2013 |
20140008915 | GEARLESS CONTRA-ROTATING WIND GENERATOR - A wind turbine generator comprises a stator disposed between first and second generator rotors. The first generator rotor comprises a first rotor shaft and an inner permanent magnet rotor. The second generator rotor is configured to contra-rotate relative to the first generator rotor, and comprises a second rotor shaft and an outer permanent magnet rotor. Inner and outer annular ferromagnetic cores are anchored respectively to radially inner and outer portions of the stator. First and second inner permanent magnets of opposite polarity are anchored to a radially outer surface of the inner permanent magnet rotor adjacent the inner annular ferromagnetic core across an inner air gap, and first and second outer permanent magnets of opposite polarity are anchored to a radially inner surface of the outer permanent magnet rotor adjacent the outer annular ferromagnetic core across an outer air gap. | 01-09-2014 |
20140096503 | Magnetic De-Icing - An apparatus has a first member having an exposed peripheral surface and an electrically and thermally conductive portion. A circumferential array of magnets of alternating polarity are mounted for rotation about an axis relative to the first member inboard of the peripheral surface, the magnets being in sufficient proximity to the electrically and thermally conductive portions so that the rotation of the magnets about the axis is effective to generate eddy currents, in turn, is effective to heat the electrically and thermally conductive portion and, thereby, heat the exposed peripheral surface. | 04-10-2014 |
20140139062 | MODULATING CURRENT IN A DUAL GENERATOR SYSTEM - A dual-generator assembly includes a first generator configured to generate a first current and a second generator configured to generate a second current modulated based on harmonic current in the first current. | 05-22-2014 |
20140191606 | MULTI-CHANNEL WOUND-FIELD SYNCHRONOUS MACHINE - A multi-channel wound-field synchronous machine and method of assembling a multi-channel axial-flux wound-field synchronous machine are described. The machine includes an even number of stators and a plurality of field-excitation windings, each of the plurality of field-excitation windings being associated with a respective one of the stators. The machine also includes an exciter to feed all of the plurality of field-excitation windings. | 07-10-2014 |
20140265693 | INTEGRATED STARTER GENERATOR - An integrated starter-generator (ISG) system includes a flux-regulated permanent magnet machine (PMM), a wound-field synchronous machine, and a control coil controller. The flux-regulated PMM includes a stationary portion having a control coil and a plurality of permanent magnets, and a rotating portion that includes rotating armature windings. The wound-field synchronous machine includes a stationary portion that includes a main armature winding and a rotating portion that includes a main field winding that receives excitation from the flux-regulated PMM. The control coil controller controls current supplied to the control coil of the flux-regulated PMM to selectively control magnetic flux presented to the rotating armature windings. | 09-18-2014 |
20140265744 | GENERATOR ARCHITECTURE WITH PMG EXCITER AND MAIN FIELD ROTATING POWER CONVERTER - A generator includes a stationary portion and a rotating portion. The stationary portion includes a permanent magnet and a main armature winding. The rotating portion includes a main field winding and a main field rotating power converter that regulates current through the main field winding. | 09-18-2014 |
20140265747 | EPGS ARCHITECTURE WITH MULTI-CHANNEL SYNCHRONOUS GENERATOR AND COMMON FIELD REGULATED EXCITER - A generator system includes a generator having a stationary portion and a rotating portion. The generator includes an exciter field winding disposed on the stationary portion. A first channel includes a first main field winding and a first main field power converter disposed on a rotating portion. The first main field power converter selectively delivers voltage from the exciter winding to the first main field winding. A second channel includes a second main field winding and a second main field power converter disposed on the rotating portion. The second main field power converter selectively delivers voltage from the exciter winding to the second main field winding. A generator control unit is connected to the first channel and the second channel. The generator control unit monitors an output voltage at each of the first channel and the second channel and generates the first and second control signals based on the output voltage. | 09-18-2014 |
20140266076 | EPGS ARCHITECTURE WITH MULTI-CHANNEL SYNCHRONOUS GENERATOR AND COMMON UNREGULATED PMG EXCITER - A generator system includes a generator having a stationary portion and a rotating portion. The generator includes a permanent magnet based exciter with permanent magnets disposed on the stationary portion. A first channel includes a first main field winding and a first main field power converter disposed on a rotating portion. The first main field power converter selectively delivers voltage from the exciter winding to the first main field winding. A second channel includes a second main field winding and a second main field power converter disposed on the rotating portion. The second main field power converter selectively delivers voltage from the exciter winding to the second main field winding. A generator control unit is connected to the first channel and the second channel. The generator control unit monitors an output voltage at each of the first channel and the second channel and generates the first and second control signals based on the output voltage. | 09-18-2014 |
20140266077 | VARIABLE SPEED CONSTANT FREQUENCY SYSTEM WITH GENERATOR AND ROTATING POWER CONVERTER - An electric power generating system includes a brushless wound field synchronous generator with n-number of power generating channels and n-number of bidirectional switches alternatively controlled to provide ac power at the output. Each power generating channel includes a control rotating transformer, a rotating power converter supplying power to field winding from the rotating power supply, and a center-tap single phase armature winding connected to the bidirectional switches. Rotating power converter modulates current in the field winding to obtain desired frequency and phase at the system output. | 09-18-2014 |
20140266078 | GENERATOR ARCHITECTURE WITH MAIN FIELD ROTATING POWER CONVERTER - A generator includes a stationary portion and a rotating portion. The stationary portion includes a main armature winding and the rotating portion includes a main field winding a main field rotating power converter that selectively controls current supplied to the main field winding. | 09-18-2014 |
20140268431 | ROTATING DIODE ASSEMBLY INCLUDING OVERVOLTAGE PROTECTION CIRCUIT - A brushless wound field synchronous generator configured to generate an output power to drive an electrical load includes a rotating rectifier assembly. The rotating rectifier assembly includes a rotating diode assembly and a field effect transistor (FET) to control voltage across the rotating diode assembly. | 09-18-2014 |
20140319278 | RESISTIVE-INDUCTIVE DE-ICING OF AIRCRAFT FLIGHT CONTROL SURFACES - Embodiments of the disclosure include a de-icing system for an aircraft. The de-icing system includes a plurality of resistive-inductive heating elements inserted adjacent to a flight control surface and a controller configured to provide a supply current to each of the plurality of resistive-inductive heating elements. Each of the plurality of resistive-inductive heating elements produces an electromagnetic field normal to the flight control surfaces and resistive heat in response to the supply current. The electromagnetic field induces an eddy current in the flight control surface. | 10-30-2014 |
20140333300 | REGULATED MAGNETIC FLUX DENSITY FOR EXTENDED CURRENT MEASUREMENT - A current sensor senses a primary current in a conductor. The current sensor includes a core, a sensing device, and a magnetizing coil. The core is configured so that the primary current generates a first magnetic field concentrated in the core. A magnetic flux density of the core is established based upon the first magnetic field and a magnetic permeability of the core. The sensing device senses the magnetic flux density of the core and provides a voltage representative of the primary current. The magnetizing coil receives a magnetizing current when the primary current is greater than a threshold value. The magnetizing coil generates a coil magnetic field in response to the magnetizing current to decrease the magnetic permeability of the core. | 11-13-2014 |
20140354049 | AUXILIARY WINDING FOR EXTENDED CURRENT MEASUREMENT - A power controller controls power to a load and includes a primary current sensor, a controller and a current source. The primary current sensor includes a primary conductor and an auxiliary conductor. The primary conductor carries a primary current to the load and the auxiliary conductor carries an auxiliary current in the opposite direction of the primary current to provide partial flux cancellation. The primary current sensor provides an output voltage based upon a magnetic field generated by the primary current and auxiliary current. The controller determines the primary current based upon the output voltage and the auxiliary current. The current source provides the auxiliary current. The controller controls the current source to provide the auxiliary current to the auxiliary conductor if the primary current is greater than a threshold value. | 12-04-2014 |
20140354106 | REDUCTION OF LEAKAGE FLUX IN ELECTRICAL MACHINES - An electrical machine includes an armature defining a winding slot that houses a winding. A slot opening connects into the winding slot. A flux repeller is disposed in the slot opening to reduce slot leakage flux. In certain embodiments the armature is a stationary armature defining a plurality of winding slots, each winding slot housing a winding. A rotor is disposed radially apart from the stationary armature with a radial gap defined between the armature and rotor core. Each winding slot has a slot opening that connects the winding slot to the gap. A plurality of flux repellers is included as described above, with a respective one of the flux repellers disposed in each respective slot opening to reduce slot leakage flux. | 12-04-2014 |
20140361652 | INTEGRATED ELECTROMAGNETIC CLUTCH AND EDDY-CURRENT COUPLING - A system for transmission of power includes a clutch having a driven clutch member and a driving clutch member. The driven and driving clutch members are operatively connected to one another for common rotation in a first position with the clutch members engaged to one another and for rotation relative to one another in a second position with the clutch members disengaged from one another. An eddy-current coupling is operatively connected to selectively move at least one of the clutch members to engage and disengage the clutch members between the first and second positions. The eddy-current coupling is also operatively connected to provide electromagnetic eddy-current coupling between the clutch members with the clutch members in the second position disengaged from one another to drive the driven clutch member at a rate different from that of the driving clutch member. | 12-11-2014 |
20140368075 | PERMANENT MAGNET SYNCHRONOUS MACHINES WITH MAGNETIC FLUX REGULATION - An electrical machine has a permanent magnet component and a winding armature. The permanent magnet component is spaced apart for the winding armature. The winding armature includes a field excitation winding operative connected to the permanent magnet component. The field excitation winding is configured to selectively intensify and de-intensify the magnetic field of the permanent magnet for control of magnetic flux in the electrical machine. | 12-18-2014 |
20140377079 | PROPELLER ROTOR AND ENGINE OVERSPEED CONTROL - An electromagnetic device for overspeed control of a propeller driven by an engine shaft comprises a clutch, an eddy-current coupler, and an electromagnetic brake. The clutch is disposed to mechanically decouple the propeller from the engine shaft. The eddy current coupler is disposed to electromagnetically couple the propeller to the engine shaft when the clutch mechanically decouples the propeller from the engine shaft. The electronic brake is disposed to artificially load the engine shaft when the propeller load on the engine shaft is reduced by mechanically decoupling the propeller from the engine shaft. | 12-25-2014 |
20150035469 | SENSING PM ELECTRICAL MACHINE POSITION - An electrical machine includes a stator having a stator winding and a secondary transformer coil. A rotor is operatively connected to rotate relative to the stator, wherein the rotor includes a plurality of embedded permanent magnets. A primary transformer coil is wound on the rotor and is operatively connected to form a rotating transformer with the secondary transformer coil. An inverter/active rectifier component is operatively connected to the stator winding and the secondary transformer coil to control the stator winding based on a sense in the secondary transformer coil received from the primary transformer coil. | 02-05-2015 |