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| Number | Title | Issue Date |
| 7245105 | Single-phase induction motor and method for reducing noise in the same A single-phase induction motor and a method for reducing noise in the same, which can eliminate unbalance between magnetomotive forces of main and auxiliary windings in a stator of the motor, thereby implementing a low noise, low vibration motor, and can also achiev... | 07/17/2007 |
| 7081728 | Apparatus for controlling heat generation and recovery in an induction motor An induction motor system comprising an induction motor, equipped with a heat recovery and water pumping apparatus and an apparatus for controlling the electrical efficiency and resulting heat generation of the induction motor. The motor is adapted to be coupled to ... | 07/25/2006 |
| 7023167 | Control arrangement for an induction motor compressor having at least three windings, a torque-augmentation circuit a starting capacitor and a resistive element Apparatus for driving a three-phase compressor assembly from a single-phase electrical power supply having first and second power lines, said three-phase compressor assembly comprising a compressor having a rotatable shaft, an electrical motor having a rotatable sha... | 04/04/2006 |
| 7023171 | Integrated inverter for driving multiple electric machines An electric machine drive (50) has a plurality of inverters (50a, 50b) for controlling respective electric machines (57, 62), which may include a three-phase main traction machine (57) and two-phase accessory machines... | 04/04/2006 |
| 6946768 | Pole winding pattern having parallel wound paths The winding (W1) comprises at least two poles and at least one phase, with which the poles are wound. The phase comprises at least two parallel-wired winding branches (1WA, 1WB, 1WC, 1WD). At least two of the winding branches (1... | 09/20/2005 |
| 6892170 | Method and apparatus for modeling mass storage disk drive motors The present invention provides an improved model and methodology for simulating motor performance which allow increased control accuracy at the higher currents, higher speeds, and/or higher current change rates required in modem mass storage devices. In addition, th... | 05/10/2005 |
| 6885970 | Saliency-based position estimation in permanent magnet synchronous motors A method and system for the sensorless estimation of the states of the mechanical subsystem of a motor are disclosed. In particular, the method and system split the estimation problem into two sub-problems: the estimation of motor parameters as a function of positio... | 04/26/2005 |
| 6753670 | Universal energy regulating controller circuit A power controller for applying power to an induction motor or similar AC load has a variable drive circuit for staring and switching a portion of the AC input line power. In one mode, the input line power is fed straight through to the load. In another mode, the AC... | 06/22/2004 |
| 6660940 | Insulation insert for preventing strand-to-strand contact in high-voltage coils An insulation insert (40) is provided for preventing electrical shorts and/or arcing between adjacent strands in a stator coil. The insulation insert includes a thin base (42) of substantially uniform cross section and a lead-in nose (43) formed in the th... | 12/09/2003 |
| 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 |
| 5990653 | Method for controlling the speed of a single-phase asynchronous induction motor Method for controlling the speed of a single-phase asynchronous induction motor, the stator of which is equipped with a main winding (BP) and an auxiliary winding which consist of half-windings (B1, B2) which are magnetically coupled and wound in opposite... | 11/23/1999 |
| 5541487 | Driving circuit for stepping motor A driving circuit for a stepping motor comprises bridge circuits being composed of switching elements connected between a DC power source and the coils of a stepping motor, rectifier diodes connected in antiparallel to the switching elements, capacitors c... | 07/30/1996 |
| 5325035 | Control device for intermittent operation of an induction motor A single phase induction motor having a main field winding and an auxiliary field winding provided with a phase advancing capacitor is controlled by a control unit having a timer unit and a by-pass switch for by passing the phase advancing capacitor. The ... | 06/28/1994 |
| 5146147 | AC motor drive system A motor drive system for driving a single-phase PSC motor, in which the two motor windings are conductively isolated from each other, from a two phase power source. In one embodiment, the PSC motor is supplied from a two phase inverter circuit. The PSC mo... | 09/08/1992 |
| 4772842 | Drive arrangement with a three-phase motor A substantial reduction in required startup current is obtained in a drive arrangement with a three phase motor in that the stator winding of the motor comprises more than two winding legs per phase, all the winding legs of one phase being arranged in ide... | 09/20/1988 |
| 4417192 | Sectional motor starting winding circuit for three-phase motors A circuit for starting three-phase motors having a pole pair number p=2 and an uneven slot number q (slots per pole and phase) which is larger than 1 has a motor winding which is divided into two sections which can be switched on successively. To avoid a ... | 11/22/1983 |
| 4392099 | Starting system for brushless motor A first static commutator including a first controllable thyristor rectifier and a first thyristor inverter and a second static commutator including a second controllable thyristor rectifier and a second thyristor inverter are provided. First three-phase ... | 07/05/1983 |
| 4387330 | Balanced single phase alternating current induction motor A single phase alternating current induction type motor is operative at more than one voltage level using the same winding circuitry. The motor has a main winding comprising two serially connected sections similarly formed and physically disposed in slots... | 06/07/1983 |
| 4352051 | Single phase motor with reversible auxiliary windings A single phase motor is disclosed which comprises a stator assembly having a main winding, a start winding and an auxiliary winding wherein the start and auxiliary windings are connected in two alternative configurations during start and run conditions, r... | 09/28/1982 |
| 4313076 | Dynamoelectric machine, method of operating such, and circuit A dynamoelectric machine having a low A ratio during its starting mode and a high A ratio during its running mode. During the starting mode of the dynamoelectric machine, an auxiliary winding serially connected in bucking relation with a phase winding is ... | 01/26/1982 |
| 4189654 | Electrical machine operating as a generator or as an amplifier The invention relates to an electrical machine. The stator 1 is a delay line, in the form of a low-pass filter in the example, formed by inductance 11 and capacitors 12 connected between these inductances and the common conductor 13. The rotor 2 comprises... | 02/19/1980 |
