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Class 318/752 - With controlled electronic device to provide the series connection


Subclass of Class 318 - Electricity: motive power systems
Definition: Subject matter wherein the means to connect either winding
No. of patents: 13
Last issue date: 09/09/2008


NumberTitleIssue Date
7423405Electromagnetic rotating machine
In order to obtain an electromagnetic rotating machine of lightweight and high energy efficiency, which produces big torque for rotating a large-diameter fan, a coil A and coil B as excitation coils are disposed on an inner peripheral surface of a fan casing so as t...
09/09/2008
7299664Device for controlling motor in washing machine and method for controlling process of washing machine by using the same
Device for controlling a motor in a washing machine and a method for controlling a process of a washing machine by using the same, the device including a motor, a power source part for supplying a voltage to the motor, a plurality of torque varying parts parallel to...
11/27/2007
7245105Single-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
7034499Electromagnetic motor
An electromagnetic motor with increased torque. The motor has a rotor coil configured to generate a magnetic field. At least two stator coils are connected in series with the rotor coil. Each of the stator coils is configured to generate a respective magnetic field....
04/25/2006
7034498Resonant motor system
In a resonant motor system, an electrical motor having a stator with one or more windings, a rotor which may or may not be wound, and an air gap between the stator and the rotor for storing magnetic energy such that the motor exhibits a definite electrical inductanc...
04/25/2006
6847186Resonant motor system
In a resonant motor system, an electrical motor having a stator with one or more windings, a rotor which may or may not be wound, and an air gap between the stator and the rotor for storing magnetic energy such that the motor exhibits a definite electrical inductanc...
01/25/2005
6566841Scroll 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
4672284Permanent split-phase capacitor induction motor
A permanent split-phase capacitor induction motor having a capacitor (7) connected in series with an auxiliary winding (5) via an electronic switch (9) which is operated by a control circuit (11, 13) so as to obtain a higher starting torque than if the sw...
06/09/1987
4215303Washing machine motor control system
A control system for an induction electric motor utilized to drive a top loading agitator washing machine obviates the need for a mechanical transmission between the motor and the agitator of the washing machine. An integrated circuit module in the contro...
07/29/1980
4196375A.C. tape reel servo
A linear servo circuit for A.C. motors is disclosed. The servo circuitry is used in a magnetic tape transport to control the motor which operates a tape reel on which the magnetic tape is stored. The servo circuitry develops two complimentary saw-tooth vo...
04/01/1980
4084120Stepper motor valve actuator control apparatus
An actuator control system includes a ballscrew type actuator for controlling the positioning of a valve device. A control circuit is responsive to pulsed drive signals for driving a synchronous stepper motor which is operatively coupled to the actuator. ...
04/11/1978
4070604Stepper motor valve actuator
An actuator control system includes a ballscrew type actuator for controlling the positioning of a valve device. A control circuit is responsive to pulsed drive signals for driving a synchronous stepper motor which is operatively coupled to the actuator. ...
01/24/1978
4020402AC switch speed control for two phase motors
A variable burst length, switching system for controlling speed and direction of rotation of a two phase AC motor is disclosed. A bipolar DC command or error signal is supplied to a pair of pulse width modulators, one of which, depending on the DC signal ...
04/26/1977
 
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