Class 318/795 - With plural capacitors

Subclass of Class 318 - Electricity: motive power systems
Definition: Subject matter wherein there are two or more capacitors
No. of patents: 32
Last issue date: 12/20/2011

Number	Title	Issue Date
8080970	System and apparatus for use of a 3-phase motor in a vehicle A system and apparatus that allows the use of a 3-phase AC motor in a vehicle by associating a series capacitor with each phase winding. The capacitor can be charged through the motor winding and then switched to discharge through the winding in a resonant oscillato...	12/20/2011
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
7034426	Electric motor windings This invention relates to an alternating current electric motor, single phase or multiphase or synchronous generator, with primary windings (main windings) and de-saturation additional windings. Each additional winding is fed through one or more multiple capacitors ...	04/25/2006
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
6909263	Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p...	06/21/2005
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
5869942	Noise suppression in relay-switched motors Noise suppression system for a relay-switched windshield wiper, wherein reversal of current to a motor driving the wiper causes the motor to reverse. Filters contained within the motor, together with filters and shielding located external to the motor, su...	02/09/1999
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
5621295	Device for driving using an electric motor comprising means for measuring the displacement of the driven body Device for driving a body by means of an electric motor, comprising mechanical means for measuring the displacement of said body which are kinematically linked to the body and are equipped with switches (ID, IM) actuated by the mechanical measurement mean...	04/15/1997
5514943	Multi-speed motor control system A motor control system for a multi-speed electric motor electrically excited by a power source having at least two terminals. The motor controller system includes a switching device electrically connected to the terminals of the power source for alternati...	05/07/1996
5404088	Circuit for increasing motor output to compensate for increased load A circuit for boosting the power output of a motor in which a sensor stage, preferably a voltage divider, is coupled to comparator stage, preferably a reverse biased to a diode, which in turn is coupled to a power boost stage, preferably a relay and switc...	04/04/1995
5359273	Load-control circuit for a mains-powered asynchronous single-phase capacitor motor Disclosed is a circuit for controlling the load of an asynchronous motor (11), the circuit comprising two capacitors (19, 20), one of which (20) can be connected, by means of a switch (70), in parallel with the other (19). Control is provided by a current...	10/25/1994
5325034	Emergency power system for capacitor start motors An emergency power circuit powers an induction motor which has at least first and second windings. The motor is normally operating at a normal speed determined by connection to commercial frequency power line, but which is subject to failure. During failu...	06/28/1994
5300871	Dual capacitor speed control apparatus and method for electric motor An induction motor speed control apparatus and method wherein various capacitors are switched in series with the auxiliary winding of an induction motor and, during such switching, the power source is disconnected from the main and auxiliary windings and ...	04/05/1994
5247236	Starting device and circuit for starting single phase motors An auxiliary capacitance starting device is connected by only two wires to a permanent split capacitor motor. The device includes an auxiliary start capacitor and a control relay which has a set of normally closed contacts, a coil, and a resistor. The aux...	09/21/1993
5212435	Variable speed asynchronous induction motor A single-phase half-pitch capacitor induction motor capable of being varied in rotational speed between a low rotational speed and high rotational speed. The motor includes a main winding connected across a single-phase electrical power source and an auxi...	05/18/1993
5204596	Device having a multiphase load, a static converter and inductance coils A device having inductance coils which are each allocated to one phase and which are wound around a common magnetic core in the same direction and with the same number of windings. One of each of the inductance coils is connected to one of each of the pha...	04/20/1993
5162718	Starting device and circuit for starting single phase motors An auxiliary capacitance starting device is connected by only two wires to a permanent split capacitor motor. The device includes an auxiliary capacitor and a potential relay which has a set of normally closed contacts and a relay coil. The auxiliary capa...	11/10/1992
4853569	Noise suppression circuit for capacitor motors A noise suppression circuit is provided for capacitor-start and capacitor-run alternating current motors. To prevent rotor chattering and noise from occurring upon disconnection of power from the motor, separate switches are used to connect alternating cu...	08/01/1989
4808868	Single and polyphase electromagnetic induction machines having regulated polar magnetic symmetry An induction motor includes a stator having at least one pair of stator windings and a rotor with rotor windings which are magnetically coupled to the stator windings via a circumferential air gap. The rotor windings are connected together in a squirrel c...	02/28/1989
4794288	Series resonant capacitor motor A series resonant capacitor motor is operated from a source of single phase alternating current power, and the start and run windings are wound on the stator electrically angularly displaced from one another by 90°. The run winding is of heavy wire, and ...	12/27/1988
4734601	Noise suppression circuit for parallel resonant motor A noise suppression circuit is provided for an alternating current motor which has a capacitor connected in parallel with one of the windings to form an LC resonant circuit at the operating frequency of the motor. The motor includes first and second windi...	03/29/1988
4697132	Reduction of voltage drop in power distribution systems and of loss of motor torque Apparatus and method for reducing the voltage drop in an electrical power distribution system during the starting of a multi-phase induction motor having stator windings supplied therefrom and for decreasing the loss in starting torque of the motor. A cap...	09/29/1987
4642545	Static phase conversion circuits for three-phase motors A three-phase A.C. motor having three stator windings with stator winding power input terminals T1, T2 and T3, is energized from a single-phase A.C. line through a static phase conversion circuit that connects terminals T1 and T2 directly to the single ph...	02/10/1987
4464618	Compound field motor A single phase induction motor of the capacitor start, capacitor run type, has a rotor and stator of conventional polyphase design and a two phase stator winding comprising a main winding with approximately 70% as many turns as a comparable conventional s...	08/07/1984
4451775	Motor/generator starting circuit A circuit for use with an induction generator. The circuit is arranged to initiate operation of the induction generator as a motor to bring the system up to operating speed and subsequently to rearrange the system automatically to cause the induction gene...	05/29/1984
4350945	Phase converter controlled by D-C power The control relay of a phase converter for converting a three phase motor to one phase operation is operated by D-C power in order to prevent voltage fluctuations on single phase power lines from causing the starting capacitors or the motor from being des...	09/21/1982
4348626	Two-speed single phase motor with centrifugal switch A two-speed single phase motor of the capacitor-start type is disclosed wherein the motor is switched from the start condition to the run condition by means of a single contact centrifugally actuated switch. The motor comprises high speed and low speed ma...	09/07/1982
4132932	Balanced split-phase electric motor A motor is disclosed in which the main stator winding of, for example, a squirrel case inducting motor, is connected in series with a capacitor so that the capacitor, together with the input voltage, causes the stator core to periodically switch from a no...	01/02/1979
4095149	Optimized electric motor having controlled magnetic flux density A motor is disclosed in which a control winding is provided to generate magnetic flux in the stator to vary the volt-second capacity of the magnetic material of the stator in accordance with varying line, load or other selected conditions. The current in ...	06/13/1978
4066937	Control circuit for a two speed single phase motor A control circuit for a two-speed single-phase motor as used in a hermetic refrigerant compressor which includes means for preventing welding of the start relay contacts of the start relay means by electrical discharge from the run capacitor. In one aspec...	01/03/1978
4063135	Electric motor having controlled magnetic flux density A motor is disclosed in which the stator winding of, for example, a squirrel cage induction motor, is connected in series with a capacitor so that the capacitor, together with the input voltage, causes the stator core to periodically switch from a nonsatu...	12/13/1977

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Class 318/795 - With plural capacitors