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| Number | Title | Issue Date |
| 7782008 | Motor and method for controlling operation of motor A self-magnetizing motor incorporates a control circuit that starts the motor, controls a magnetizing unit, and then operates the motor. The control circuit can include relay, such as a bi-directional conductive power semiconductor device, and one or more PTC (Posit... | 08/24/2010 |
| 7663335 | Single-phase induction motor A single-phase induction motor comprises a power consumption prevention device, which includes a current signal transfer element and a switching element. The switching element is turned on/off according to the current signal received from the current signal transfer... | 02/16/2010 |
| 7612519 | 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... | 11/03/2009 |
| 7548039 | Motor control unit A motor control unit including a rotational position detector detecting a rotational position of a brushless DC motor; a current detector detecting a current of the brushless DC motor; a coordinate transformer executing rotational coordinate transformation of the cu... | 06/16/2009 |
| 7408321 | 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... | 08/05/2008 |
| 7391179 | Mutual Inductance Contactless Starter An inductive contactless starter can be provided for single-phase AC motor, which can be designed to start a compressor motor with a starting capacitor or a common single-phase AC motor. The starter can comprise a current mutual-inductor composed of two primary coil... | 06/24/2008 |
| 7315463 | Apparatus and method for multi-phase transformers A method and apparatus for multi-phase transformers are described. In one embodiment, a coupled inductor topology for the multi-phase transformers comprising N primary inductors. In one embodiment, each primary inductor is coupled to one of N input nodes and a commo... | 01/01/2008 |
| 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 |
| 7071649 | Active temperature estimation for electric machines A method and system for estimating a temperature of an electric machine comprising obtaining a temperature value responsive to a temperature signal from a temperature sensor, the temperature sensor is operatively connected to and transmitting the temperature signal ... | 07/04/2006 |
| 7071650 | Synchronous induction motor and electric hermetic compressor using the same A synchronous induction motor has a stator having a main winding and an auxiliary winding; a rotor having a yoke, a permanent magnet embedded in the yoke and a secondary conductor provided in the vicinity of periphery of the yoke; and a starter. The starter has a st... | 07/04/2006 |
| 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 |
| 7042192 | Switch assembly, electric machine having the switch assembly, and method of controlling the same A compressor having a winding circuit and a driven member being driven in part by a winding of the winding circuit. The compressor further includes an auxiliary circuit connected in a parallel relationship with the winding circuit. The auxiliary circuit has an auxil... | 05/09/2006 |
| 7005827 | Starting circuit for single-phase induction motor A starting circuit for a single-phase induction motor includes a motor starting positive characteristic thermistor and a triac arranged in a series connection, and a triac control positive characteristic thermistor connected in parallel with the motor starting posit... | 02/28/2006 |
| 6930464 | Driving circuit for improving starting of hybrid induction motor and method thereof A driving circuit for improving starting of a hybrid induction motor and its method includes a capacitor for operation electrically connected between a main coil and a auxiliary-coil, and a starting and current cutting-off means electrically connected with the capac... | 08/16/2005 |
| 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 |
| 6407530 | Device and method for controlling supply of current and static capacitance to compressor A device and method for controlling a supply of a current and a static capacitance to a compressor are disclosed. The device includes a control signal generating part for controlling a current and a static capacitance provided to the compressor, such that... | 06/18/2002 |
| 6239523 | Cutout start switch A motor start switch includes a temperature responsive resistor element and a bimetal cutout switch electrically connected in series with a start winding of an electric motor. The cutout switch is operable between an open position disconnecting the temper... | 05/29/2001 |
| 6204628 | Motor start switch A method and apparatus are provided for disconnecting a starting winding of a single-phase motor during startup. The method includes the steps of disposing a heater element of a thermal switch in series with a main winding of the single-phase motor and di... | 03/20/2001 |
| 5973473 | Motor control circuit A control circuit that activates and deactivates a motor start winding at different motor rpm trip points provides improved accuracy in the trip points by automatically compensating for changes in motor current caused by variations in line voltage and mot... | 10/26/1999 |
| 5952811 | Device for shutting off current through a motor start-up circuit after a specified wait period A device for automatically shutting off a current is used in combination with a motor start-up component incorporated in a motor-driving circuit including an auxiliary coil which operates at a start-up time of a motor and a main coil for its steady-state ... | 09/14/1999 |
| 5898289 | Motor start-up circuit with a triac and PTC thermistors A motor start-up circuit is incorporated in a motor-driving circuit provided with an auxiliary coil which operates during a start-up time of the motor and a main coil for a steady-state operation of the motor. The start-up circuit in one form has a start-... | 04/27/1999 |
| 5789897 | Component for motor start up circuit A motor-driving circuit includes an auxiliary coil which functions at the time of the start-up of the motor and a main coil for its stead state operation. A component of a start-up circuit to be incorporated in such a motor-driving circuit includes a ther... | 08/04/1998 |
| 5617001 | A.C. motor starting control circuit utilizing triggerable semiconductor switching device A starting circuit for use with single phase induction motors such as capacitor run and capacitor start, capacitor run motors is shown having a triggerable semiconductor (Q1, Q2 and Q3) serially connected to the auxiliary winding (AW) across the power sup... | 04/01/1997 |
| 5451853 | Starting device for a single phase induction motor A starting device for a single phase induction motor can reduce the power consumption and restart in a short time. The starting device for the single phase induction motor having a main winding and a starting winding comprises a starting positive temperat... | 09/19/1995 |
| 5391971 | Circuit for starting single-phase AC induction motor A circuit for starting a single-phase AC induction motor 11 having a main winding 12 and an auxiliary winding 13, which is so constructed that a PTC element 16 and a triac 17 are connected in series with the auxiliary winding 13 and a gate voltage of the ... | 02/21/1995 |
| 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 |
| 5192887 | Starting multi-speed motors at a low speed connection A multi-speed electric motor (1) has a main electrical winding (3) and an auxiliary electrical winding (5) connected in parallel. One additional electrical winding (21) is connected in series with the parallel connected main and auxiliary windings, and an... | 03/09/1993 |
| 4574229 | Power efficient motor starter and circuit breaker for an induction motor A motor starter and protection circuit is disclosed wherein a bimetallic contact support supports moveable contacts which are electrically interconnected with stationary contacts during normal non-overload conditions. Current from the power support passes... | 03/04/1986 |
| 4467385 | Supply and protection unit for a hermetic compressor A supply and protection unit for a hermetic compressor of a thermostatically regulated refrigerator comprising an electrically insulating support body (3) adapted to be fixed to the casing of the compressor (P); said support body being provided with cavit... | 08/21/1984 |
| 4422120 | Combination starter-protector device A combination starter-protector device for a winding circuit of a dynamoelectric motor comprises a housing structure having a perforated wall dividing the interior of the housing structure into starter and protector compartments. The starter compartment a... | 12/20/1983 |
| 4408244 | Circuit safe against overload for varying the amount of power to an electric blower motor A circuit, safe against an overload, for incrementally varying the power to an electric blower motor used for heating, ventilating and conditioning vehicles, having a PTC resistor in series with other series resistors in the circuit.... | 10/04/1983 |
| 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 |
| 4272714 | Starter device for a single-phase asynchronous motor The invention relates to a starter device for single phase, asynchronous motors, the starter device being of the type which provides a PTC resistor for series starting operation with the auxiliary winding. The starter device may be used for different type... | 06/09/1981 |
| 4047082 | Variable threshold starting circuit for induction motor A circuit for the automatic starting of an induction motor of the type having a sensing means for producing a signal proportional to the main winding current and control means for allowing current flow through a start winding only when energized by a star... | 09/06/1977 |
