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| Number | Title | Issue Date |
| 7659686 | Motor-generator control system In a motor-generator control system for controlling a motor-generator, first and second sets of multiphase windings of a motor-generator are arranged to be spatially shifted in phase from each other. An allocating unit is configured to, upon input of workload reques... | 02/09/2010 |
| 7602137 | Electronically commutated motor and control system A power tool having an electronically commutated DC motor capable of providing various operating modes ranging from a maximum efficiency operating mode to a maximum power operating mode. The motor has a rotor having permanent magnets mounted in recesses in a back ir... | 10/13/2009 |
| 7514898 | Low loss propulsion system This invention relates to low loss power supply system comprising a rectifying bridge (3) supplying current to a motor, wherein the rectifying bridge including two AC power feed inputs PA, PB as well as at least one output for supplying power to said motor M,... | 04/07/2009 |
| 7235891 | Power system having generator driven by engine An apparatus for controlling the operation of power conditioners (10) for supplying the generated power to an external power system such as a commercial power system, in which power conditioners (10) are interconnected to an external power system, the ... | 06/26/2007 |
| 7235906 | Magnetic bearing using displacement winding techniques The present invention provides a linear, rotary spherical motor with an integrated magnetic bearing. The motor can be a toothless permanent magnet, BLDC design composed of a permanent magnet rotor and a Zigzag stator winding containing at least two-phase windings, w... | 06/26/2007 |
| 7202617 | Circuit and method for controlling brushless DC motor A circuit for controlling a brushless permanent magnet motor is provided. The circuit comprises windings, each of the windings having a first end connected at a common node and each of the windings having a second end connectable directly to supply voltages by switc... | 04/10/2007 |
| 7202572 | Generator/motor system and method of operating said system A generator/motor system and a method for operating this generator/motor system with which the filter currents are reduced. The generator/motor system has, for this purpose, a rotational field machine (DM) and a pulse-controlled inverter and filter capacitors (C1... | 04/10/2007 |
| 7190086 | Wind energy plant with an asynchronous machine for determining the azimuth position An asynchronous machine has a first rotor/stator arrangement in which the rotor is connected to a shaft, and a method of controlling such an asynchronous machine is provided. A drive is provided which permits nullification of the play of the mechanical components in... | 03/13/2007 |
| 7190136 | Variable speed brushless DC motor A variable speed brushless DC motor includes a rotor, a stator module, and a commutation circuit having commutation switches and a speed-change switch. By means of on/off status of the speed-change switch to control the way of electric current passing through the st... | 03/13/2007 |
| 7135799 | Method for winding a stator of multi-phase motors A method for winding a stator of a multi-phase motor includes successively winding each of a plurality of teeth on the stator with a continuous winding wire to connect each of the phases in the motor together. The wound wire is disconnected between any two phases wh... | 11/14/2006 |
| 7113075 | Power supply methods and apparatus A detection circuit includes a first power line, a first signal conditioning module operationally coupled to the first power line, a neutral line (N) operationally coupled to the first signal conditioning module, a second signal conditioning module operationally cou... | 09/26/2006 |
| 7092836 | Method for locating wiring swap in a hi-fix structure of a simultaneous multi-electronic device test system A method for locating wiring swap in a hi-fix structure of a simultaneous multi-electronic device test system is introduced to screen the complicated wiring state of the hi-fix structure and to pinpoint the wiring swap thereinside as well. The hi-fix structure has a... | 08/15/2006 |
| 7088073 | Inverter drive system Systems and methods are provided for dynamically changing configurations of multi-inverter drive systems. By changing configurations during operation, a multi-inverter system of the present invention can provide greater than half of full output power during failure ... | 08/08/2006 |
| 7084600 | Power control apparatus for a turbo charger equipped with an assist motor and a motor driven turbo charging apparatus A power control apparatus includes an inverter giving a rectangular waveform drive signal to an induction motor, an inverter voltage controlling section controlling an output voltage of the inverter, a converter boosting a voltage supplied to the inverter, a convert... | 08/01/2006 |
| 7034500 | Electric drive assembly An electric drive includes a rotatable shaft, a first drive member, and a second drive member, and is supplied with power from a controller. The controller is operable to supply a first power from a power electronics converter, and a second power that is line power.... | 04/25/2006 |
| 6998750 | Permanent magnet type three-phase AC rotary electric machine Several embodiments of permanent magnet type three-phase AC rotary electric machines wherein the phase current flow is formed by parallel circuits formed by a plurality of serial circuits each comprising one or a plurality of stator coils so that electromagnetic vol... | 02/14/2006 |
| 6956728 | Method and apparatus to control modular asynchronous contactors A modular asynchronous contactor assembly includes a contactor for each phase or pole of an electrical device. The contactor assembly is applicable as both a switching device and an isolation or load protection device. As such, each contactor is constructed so that ... | 10/18/2005 |
| 6894455 | Performance improvement of integrated starter alternator by changing stator winding connection A method for controlling voltages in an integrated starter alternator electric machine is provided where the armature windings are manipulated in a Δ/Y/Δ fashion. In particular, the armature windings are arranged in a Δ connection during engine cranking operation... | 05/17/2005 |
| 6847185 | Apparatus for switching windings of AC three-phase motor It is an object to provide a winding switching device of a three-phase AC motor having a small size at a low cost in which a time required for switching a winding is shortened and the number of semiconductor switch units is decreased as much as possible. In a windin... | 01/25/2005 |
| 6710495 | Multi-phase electric motor with third harmonic current injection Significantly increased torque is provided from a motor having a stator with a core and at least two three-phase windings wound on the core. The two windings are separated spatially by 30 electrical degrees. Power is provided to the two windings by two power supplie... | 03/23/2004 |
| 6566841 | Scroll compressor having multiple motor performance characteristics A system includes a motor mounted within a housing and a compressor pump unit. A single-phase PSC motor includes a switch assembly which selectively connects primary or alternate windings. During normal load operation, when maximum efficiency is desired, ... | 05/20/2003 |
| 6445157 | Method for operating an electric generator/motor system A method of operating an electric three-phase machine with a polyphase winding arrangement in a vehicle. The phases of the winding arrangement are connected to a vehicle network with the aid of power converters and the winding arrangements are interconnec... | 09/03/2002 |
| 6420847 | Device for detection of current or voltage on a PWM driven winding with reduced jitter and related methods A method for detecting a zero-cross event of an induced back electromotive force (BEMF) or of a nullification instant of a periodic current in a PWM driven winding, by circuits generating an analog signal representative of the induced BEMF or of the nulli... | 07/16/2002 |
| 6362592 | Method and device for driving brushless motors either with independently coupled windings or with star or polygon pre-connected windings using the same I.C. A method is provided for driving a brushless motor of a type including windings pre-connected in a star or polygon configuration with an integrated driving system designed for independently driving the phase windings. The integrated driving system include... | 03/26/2002 |
| 6331760 | Capacitive induction motor and method An improved induction motor having at least one capacitive element electrically connected in parallel with and tapped to each phase of a delta- or wye-wound stator winding such that the capacitive elements are alternately charged or discharged during oper... | 12/18/2001 |
| 6304053 | Automatic firing change when motor leads swap on delta motor soft starter Problems associated with delta motors and motor controllers being subjected to swapped lead conditions as well as with time consuming troubleshooting are eliminated in a motor controller that automatically changes firing circuit timing for proper operatio... | 10/16/2001 |
| 6269013 | Chopping energization control device A chopping energization control device is made up of a first switching element interposed between one end of a load and one terminal of a power supply, a second switching element interposed between the other end of the load and the other terminal of the p... | 07/31/2001 |
| 6255797 | AC motor with reactor interposed between AC motor and power source A reactor (32) and a switch (35) are interposed in parallel between U-phase, V-phase and W-phase on a power source side (31) and U, V and W terminals on a motor side (33). A changeover switch )37) is interposed between Z, X and Y terminals on the motor si... | 07/03/2001 |
| 6169383 | Self adapting motor controller Problems associated with maintaining a large inventory of multiple types of motor controllers designed to accommodate a single motor type are eliminated in a motor controller that automatically senses if it connected to a delta motor or a wye motor and co... | 01/02/2001 |
| 6154003 | Driving means formed by induction motor and method for starting the same An induction motor as driving apparatus includes two stators in which two rotor cores each formed in a squirrel cage type are rotatably mounted on a common rotary axis; two stators which respectively surround the two rotors and on which stator windings ar... | 11/28/2000 |
| 6135720 | Air compressors of sliding vane eccentric rotor type An air compressor includes a stator, which includes an inlet and an outlet and defines a substantially cylindrical bore, and a rotor eccentrically rotatably mounted in the bore. The rotor is connected to be rotated by a three-phase asynchronous electric m... | 10/24/2000 |
| 6094022 | Low jitter zero crossing BEMF detector and motor incorporating the same A BEMF detector and method detect the BEMF of a three-phase motor using a fully differential detection system. The motor has a first coil coupled between a first coil tap and a center tap, a second coil coupled between a second coil tap and the center tap... | 07/25/2000 |
| 6025693 | Motor starter An improved method of starting three-phase and three-winding induction motors from a single phase supply reconfigures the 6 accessible windings of a standard induction motor into first an optimal starting configuration which, for example, may reduce start... | 02/15/2000 |
| 5859520 | Control of a brushless motor The invention provides a method for controlling a brushless motor, with windings connected in star (`wye`) formation, including the steps of periodically applying a supply voltage between first and second windings, detecting the presence of a current in a... | 01/12/1999 |
| 5838135 | Driving means formed by induction motor and method for starting the same An induction motor as driving apparatus includes two stators in which two rotor cores each formed in a squirrel cage type are rotatably mounted on a common rotary axis; two stators which respectively surround the two rotors and on which stator windings ar... | 11/17/1998 |
| 5818195 | Dual state controller for brushless electric motors A controller is provided for use with electric motors which will achieve a two mode motor operation. In this operation, a first mode is utilized having a torque configuration thus more efficiently providing high torque outputs from the motor. However, a s... | 10/06/1998 |
| 5760567 | Induced voltage reduction method and an induced voltage reduction apparatus for an induction motor A method and apparatus for controlling an induction motor having at least high speed windings and reduced speed windings divides the reduced speed windings into first and second portions. The first and second portions of the reduced speed windings are ele... | 06/02/1998 |
| 5675230 | Method and apparatus for dynamic low voltage spindle motor operation Dynamic operation of a brushless N-phase DC motor results in a high torque constant (Kt) line-to-line phase configuration during spindle motor power-up, and in a lower effective Kt configuration once normal run speed operation is attained. When the spindl... | 10/07/1997 |
| 5656897 | Current sensing and control in brushless DC motors A motor drive system, and method for operating the same, which includes current mirror load current sensing, is disclosed. Sensed current is used in the well known manner to control the low side drive of the motor. The disclosed motor system operates in a... | 08/12/1997 |
| 5614799 | Brushless direct current motor having adjustable motor characteristics A brushless direct current motor includes a permanent magnet mounted to a rotor and a set of commutated stator windings. The motor further includes a circuit for changeably connecting the set of stator windings to operate in a first electrical configurati... | 03/25/1997 |
