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| Number | Title | Issue Date |
| 7554284 | Inductance contactless starter An inductive contactless starter for single-phase AC motor, comprising a current inductor and a triac; wherein, one terminal of secondary coil of said current inductor is connected to the gate electrode of said triac, the other terminal is both connected to the firs... | 06/30/2009 |
| 7218075 | Electronic circuit for starting a single phase induction motor An electronic circuit for starting a single phase induction motor, of the type containing a rotor and a stator with at least one running coil (B1) and one starting coil (B2), for operating jointly with an alternating current source (F), comprising: a t... | 05/15/2007 |
| 7199549 | Feedback parameter estimation for electric machines A method and system for estimating a parameter of an electric machine, including a controller and a switching device, the controller executes a parameter estimation process, which is responsive to at least one of: a current value and a torque command and the resulta... | 04/03/2007 |
| 7061204 | Motor starter device having reduced power consumption A motor starter for use with a motor (20) having a main winding (M) and a start winding (S). The starter has a PTC thermistor (30) connected in series with the start winding (S). A triac (40) is connected between PTC thermistor (30) and a... | 06/13/2006 |
| 6940249 | Inverter device An inverter device capable of smoothly driving an alternating current synchronous motor of large capacity and high-speed rotation is provided. The inverter device includes a power rectification main circuit for converting alternating current power into direct curren... | 09/06/2005 |
| 6653806 | Dynamic brake circuit and semiconductor inverter using dynamic brake circuit The invention prevents the voltage change dv/dt occurring at an inverter from directly igniting a semiconductor braking switch and short-circuiting the inverter during operation. In a dynamic brake circuit which absorbs energy by brake resistor 15 upon ig... | 11/25/2003 |
| 6605918 | System and method for compensating the reading of noncontinuous AC sinusoidal currents A motor controller for a motor operated by an AC line voltage includes solid-state switches connectable between an AC line and a motor terminal for controlling application of AC line voltage to the motor. A current sensor senses motor current. A control c... | 08/12/2003 |
| 6570359 | Motor starting circuit A starting circuit for a single phase motor having a main winding and a starting winding has a triac in series with the starting winding, and a current sense device in series with the main winding. The current sense device is a NTC resistor or current tra... | 05/27/2003 |
| 6479961 | Starting system for an electric motor A starting system for an electric motor having a main coil and an auxiliary coil which are supplied current by an electric current source in which a switch is connected between the electric current source and the auxiliary coil that has an open condition,... | 11/12/2002 |
| 5814966 | Digital power optimization system for AC induction motors A method and apparatus are disclosed for improving the efficiency of operation of AC induction motors. The method and apparatus utilizes a microprocessor to tune a motor control system such that the time interval between the turn-on of a bi-directional sw... | 09/29/1998 |
| 5386184 | System for use with an electronically commutated electrical machine A modified inverter/converter unit electronically commutates a switched reluctance machine to provide multiple voltage levels for engine and aircraft applications. A set of power switching transistors apply an exciting current to windings in the switched ... | 01/31/1995 |
| 5359272 | Sensorless drive control and method for doubly-fed reluctance motor A doubly-fed reluctance motor (10) has a primary winding set (20) and a secondary winding set (22). A drive control (32) for the motor includes a connection (36) to the primary winding so primary winding current and voltage signals (ip, Vp... | 10/25/1994 |
| 5212436 | Single phase motor start system An autotransformer is used to replace the start capacitor in a split phase induction motor. The autotransformer windings are protected by a PTC resistor which also serves to effectively de-energize the auxiliary winding. In a preferred embodiment, efficie... | 05/18/1993 |
| 5206573 | Starting control circuit A starting control circuit is provided for use with a mechanical duty single phase alternating current motor having a start winding and a main or run winding. Both the main and start windings are electrically connected to the alternating current source du... | 04/27/1993 |
| 4651077 | Start switch for a single phase AC motor A start switch is provided for a single phase AC motor having a start winding and a start capacitor connected in series with the start winding and a main winding connected in parallel with the start winding and start capacitor. The AC motor is connectable... | 03/17/1987 |
| 4496895 | Universal single phase motor starting control apparatus A starting circuit for single phase electric motors including both split-phase and capacitor start motors includes a gate controlled solid state switch serially connected to the start winding of the motor. Rectified reference pulses from a pulse transform... | 01/29/1985 |
| 4486700 | Universal single phase motor starting control apparatus A starting circuit for single phase electric motors including both split-phase and capacitor start motors includes a gate controlled solid state switch serially connected to the start winding of the motor. Rectified reference pulses from a pulse transform... | 12/04/1984 |
| 4388580 | Magnetic device for controlling starting of a single phase induction motor A starter device for a single phase A.C. motor having a main winding and a starting winding disposed for connection to a single A.C. source. This starter device comprises a semiconductor switching device having a control electrode and a transconductive pa... | 06/14/1983 |
| 4307327 | Control arrangement for single phase AC systems This disclosure relates to control apparatus and particularly to a triggered switch connected in a first or controlled circuit and a trigger device connected in a second circuit. AC currents flow through the first and second circuits and there is a changi... | 12/22/1981 |
