| Patent Number |
Title Of Patent |
Date Issued |
| 7554302 |
Slip-controlled, wound-rotor induction machine for wind turbine and other applications |
June 30, 2009 |
| A system and method for providing constant-frequency electrical power from variable-speed mechanical power are disclosed. The system includes a wound-rotor induction machine generator (WRIMG), a first power converter, e.g., an inverter or a bridge rectifier, that provides power from the |
| 7545132 |
Sensor-less, low frequency adaptive current limiter and methods for limiting inductive current u |
June 9, 2009 |
| Devices and systems that use an adaptively limited PWM duty-cycle to control a circuit and methods and control programs to operate and to control the devices and systems to adaptively limit the PWM duty-cycle are disclosed. The devices and systems are capable of adjusting the duty-cy |
| 7545062 |
Devices and systems for cooling insulated, strip-laminated structures by convection |
June 9, 2009 |
| A device and system for removing heat from a magnetic device such as an electromagnet core section of a magnetic bearing internally by convection. The device includes a ribbon-type conductor portion and an insulator portion that are spirally and coaxially arranged on a coil. The insu |
| 7514907 |
Device, system, and method for providing a low-voltage fault ride-through for a wind generator f |
April 7, 2009 |
| A device, a system, and a method for preventing power-producing wind turbine generators from tripping due to the detection of a low-voltage condition on a power grid are disclosed. The disclosed device includes a resistor bank that absorbs real power and a control system that maintains |
| 6819561 |
Finned-tube heat exchangers and cold plates, self-cooling electronic component systems using sam |
November 16, 2004 |
| The present invention provides a heat exchange system for conducting heat away from high-power, heat-producing electronic components by conduction and convection. The heat exchange system comprises a metal tube that has been forged and drawn so as to define a flow channel for a cooling f |
| 6634421 |
High performance cold plate for electronic cooling |
October 21, 2003 |
| A fluid cooling device, and a method for manufacturing the fluid cooling device, are disclosed. The fluid cooling device includes a plurality of cold plate members, each having a plurality of imperforate plate portions and perforate portions arranged in a line; and, at least one connecto |
| 6515383 |
Passive, phase-change, stator winding end-turn cooled electric machine |
February 4, 2003 |
| A device and method for substantially enhancing the cooling of electric machines, e.g., motors and generators, is described. A hermetically-sealed chamber surrounds electric wire winding end-turns at either end of the stator core, and contains at least one phase-change coolant. The coola |
| 6498713 |
Low-inductance capacitor and a method for minimizing inductance in a snubber circuit |
December 24, 2002 |
| A low-voltage, low-inductance device for storing electrical charge in a snubber circuit and a method of minimizing inductance in the snubber circuit using the device, wherein the device includes a plurality of extended electrodes, in parallel or series, that are joined to a positive |
| 6452289 |
Grid-linked power supply |
September 17, 2002 |
| A grid-linked power supply is described. An inverter, at least one distributed energy source to meet normal, non-peak power demand, a connection to a public utility grid to meet peak power demand requirements, and a converter for regulating delivery of power from the distributed ener |
| 6411065 |
Integrated control system and method for controlling mode, synchronization, power factor, and ut |
June 25, 2002 |
| An integrated system for comprehensive control of an electric power generation system utilizes state machine control having particularly defined control states and permitted control state transitions. In this way, accurate, dependable and safe control of the electric power generation |
| 6380719 |
Integrated control system and method for controlling mode, synchronization, power factor, and ut |
April 30, 2002 |
| An integrated system for comprehensive control of an electric power generation system utilizes state machine control having particularly defined control states and permitted control state transitions. In this way, accurate, dependable and safe control of the electric power generation |
| 6330064 |
Doubly-differential interferometer and method for evanescent wave surface detection |
December 11, 2001 |
| A high speed, highly sensitive optical sensing platform and a method for detecting and/or measuring characteristics of a substance in a measurement sample are disclosed. The platform includes at least one pair of optical paths formed in a waveguide, a light source for injecting optical b |
| 6316918 |
Integrated control system and method for controlling mode, synchronization, power factor, and ut |
November 13, 2001 |
| An integrated system for comprehensive control of an electric power generation system utilizes state machine control having particularly defined control states and permitted control state transitions. In this way, accurate, dependable and safe control of the electric power generation |
| 6273186 |
Low-cost, high density, staggered pin fin array |
August 14, 2001 |
| A high-density, staggered pin fin array, and a method for manufacturing the pin fin array, are disclosed. The pin fin array includes a plurality of fin members, each having a plurality of elongated, pin-shaped fins arranged in a row; and, at least one connector for connecting the fins |
| 6262505 |
Flywheel power supply having axial magnetic bearing for frictionless rotation |
July 17, 2001 |
| A power supply device for providing uninterrupted power for a period of time is disclosed. The power supply device has a controller and a flywheel device. The flywheel device has a housing that contains a flywheel rotor and a motor/generator rotor. The flywheel rotor and the motor/genera |
| 6239582 |
Motor vehicle alternator having a single voltage sensor and a half-wave controlled rectifier bri |
May 29, 2001 |
| An alternator system having a single voltage sensor and a half-wave controlled rectifier bridge for increasing/decreasing alternator output power is disclosed. The half-wave controlled rectifier bridge includes three diodes and three active switches. The alternator system further inc |
| 6222349 |
Temperature feedback control of alternator output power |
April 24, 2001 |
| A charging system including an alternator, and a controller for controlling the output of the alternator to provide a required output to be in tolerance with a measured load, the controller having at least one temperature sensor, and a temperature control device, wherein the temperat |
| 6215271 |
Charging system having a controlled rectifier bridge and a single voltage sensor |
April 10, 2001 |
| A charging system has an alternator, a battery, and a controlled rectifier bridge between the alternator and the battery. The controlled rectifier bridge has controllable elements. A controller is provided wherein the controller controls (a) the duty cycle of the alternator field winding |
| 6118238 |
Motor starting apparatus for an engine driven generator |
September 12, 2000 |
| A conventional motor controlling circuit is adapted to control an inverter that drives a permanent magnet generator as a motor to spin an engine to a speed sufficient to permit the engine to start. The commutation frequency is adjusted as a function of speed utilizing an automatic commut |
| 6097124 |
Hybrid permanent magnet/homopolar generator and motor |
August 1, 2000 |
| Featured is a hybrid permanent magnet/homopolar power producing device and methods related thereto. The device includes first and second portions, the portions being arranged to have a common long axis and so one portion is moving with respect to the other portion. The first portion incl |
| 6084296 |
Low cost high power hermetic package with electrical feed-through bushings |
July 4, 2000 |
| A method for providing pre-placed, pre-brazed feed throughs in the substrate of a hermetic package corresponding to the terminal leads of the encased circuit COTS components. The substrate may include directly bonded copper (DBC) regions forming circular shapes where the holes for the |
| 6049148 |
Integrated magnetic levitation and rotation system |
April 11, 2000 |
| A rotary motor and a rotary magnetic bearing are integrated in a compact assembly that is contact-less. A stator assembly surrounds a ferromagnetic rotor with an annular air gap which can accommodate a cylindrical wall, e.g. of a chamber for semiconductor wafer processing. The stator ass |
| 5998957 |
Dissipativity-based controller for synchronous electric drives, and associated methods |
December 7, 1999 |
| The invention provides a controller for specifying a drive voltage for synchronous motors relative to a desired speed profile. The controller senses motor current and optionally senses motor rotational position. A motor torque reference is first determined to balance (a) an estimated |
| 5969446 |
Flywheel permanent magnet machine |
October 19, 1999 |
| A flywheel energy storage device has a central shaft, a flywheel having a flywheel rotor supported by and mounted for rotation around said shaft, and a motor/generator having a stator and a rotor. The rotor is formed integrally with the flywheel rotor. The stator has an outer cylinder th |
| 5929612 |
Externally field-controlled induction generator |
July 27, 1999 |
| In an induction generator, an additional set of stator windings is provided, separate from and secondary to the main stator windings upon which the generator's output voltage is generated and supplied to the load. This separate stator winding is provided for the purpose of supplying |
| 5901233 |
Narrow band controller |
May 4, 1999 |
| A narrow band controller for suppressing disturbances from a source responsive to an input signal representative of the frequency spectrum of a disturbance from the source and providing an output signal having a similar frequency spectrum as the frequency spectrum of the input signal |
| 5893423 |
Integration of turboalternator for hybrid motor vehicle |
April 13, 1999 |
| A turboalternator for a hybrid motor vehicle includes at least one compressor, at least one turbine, at least one alternator disposed between the at least one compressor and the at least one turbine, and a common shaft interconnecting the at least one compressor and the at least one |
| 5880542 |
Light reaction mass actuator |
March 9, 1999 |
| A very light, high force reaction-mass actuator using high energy density magnetostrictive material to accelerate a mass, producing a reaction force that can be used to oppose vibration forces. The reaction-mass actuator is configured having an axially symmetric design that features a Te |
| 5798593 |
Solid rotor assembly |
August 25, 1998 |
| An induction motor includes a stator defining stator inner and stator outer diameters extending about a longitudinal axis, the stator includes a plurality of windings extending longitudinally and circumferentially about the longitudinal axis between the stator inner diameter and the stat |
| 5789838 |
Three-axis force actuator for a magnetic bearing |
August 4, 1998 |
| This invention features a three-axis force actuator that axially, radially and rotatably supports a bearing member for frictionless rotation about an axis of rotation generally coincident with a Z-axis. Also featured is a magnetic bearing having such an actuator. The actuator includes an |
| 5660356 |
System for providing power and roll motion stability in a vehicle |
August 26, 1997 |
| A dual flywheel assembly for use in an airborne vehicle for storing mechanical energy therein prior to flight and for permitting the extraction of electrical energy therefrom during flight, which assembly includes two flywheels which are linked by a suitable linkage structure such th |
| 5564516 |
Clutched electric motor steering system |
October 15, 1996 |
| In the hydraulically assisted steering system disclosed herein, a hydraulic pump for powering a steering servo is in turn driven either from the vehicle's engine, through an electrically controlled clutch, or by an electric motor which can drive the pump independently of the vehicle's |
| 5465015 |
Transverse field activated magnetostrictive motor |
November 7, 1995 |
| A transverse field activated magnetostrictive motor including a magnetostrictive member having a direction of motion transverse to its principal orientation axis, and a reaction surface mechanically coupled to the magnetostrictive member. A travelling magnetic field with a field comp |
| 5442288 |
Magnetoelastic magnetometer |
August 15, 1995 |
| A magnetoelastic magnetometer having a magnetoelastic member for placement in a magnetic field, An effect on the stiffness of the magnetoelastic member caused by the magnetic field is measured, and magnitude of the field is determined in response. |
| 5353656 |
Electrostatically controlled micromechanical gyroscope |
October 11, 1994 |
| An integrated electrostatically-controlled micromechanical gyroscope with a rotor encompassed within a rotor cavity and electrostatically spun within the cavity. The gyroscope includes a plurality of axial electrostatic rotor actuators above and below the rotor for controlling the axial |
| 5319273 |
Fixed gain electromagnetic actuator and electromagnetic bearing incorporating same |
June 7, 1994 |
| A fixed gain electromagnetic actuator for controlling the position of a body including at least two pair of a magnetically permeable pole spaced from the body, bias coils about each pole, separate control coils about each pole, a bias source for the bias coils providing a current in the |
| 5291975 |
System and method for damping narrow band axial vibrations of a rotating device |
March 8, 1994 |
| A system and method for damping narrow band axial vibrations of a rotating device in which a reaction mass is coupled to the rotating device and a reaction mass actuator is employed to move the reaction mass axially along the rotating device. An effect of vibrations on the rotating devic |
| 4961352 |
Magnetic bearing and suspension system |
October 9, 1990 |
| A magnetic rotor suspension system including a magnetic rotor having a spin axis, and a generally spherical housing spaced from the rotor. The system includes means attached to the housing for applying magnetic fields to the rotor to fix its lateral and axial position relative to the hou |
| 4900962 |
Magnetic translator bearings |
February 13, 1990 |
| A magnetic bearing system for enabling translational motion includes a carriage and a shaft for movably supporting the carriage; a first magnetic bearing fixed to one of the carriage and shaft and slidably received in a first channel of the other of the carriage and shaft. The first chan |
