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Class Information
Number: 318/779
Name: Electricity: motive power systems > Induction motor systems > Primary circuit control > Starting control > With speed control
Description: Subject matter wherein means are provided for controlling motor speed during any mode of motor operation.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8704467 Inverter device for washing machine Apr. 22, 2014
8674650 Method for controlling of an AC induction motor Mar. 18, 2014
8664898 Device and method of stopping induction motor Mar. 4, 2014
8638059 Control for multi-phase induction motor Jan. 28, 2014
8629645 System and method for energizing an electric motor auxiliary winding and electric motor Jan. 14, 2014
8593094 Power conversion apparatus of electric vehicle Nov. 26, 2013
8575881 Current injection circuit for delaying the full operation of a power factor control circuit for AC induction motors Nov. 5, 2013
8547050 Control method and system with feedback indicative of load flux Oct. 1, 2013
8536811 Engagement of a spinning AC induction motor Sep. 17, 2013
8421390 Fan motor control device Apr. 16, 2013
8421397 System and method for fast start-up of an induction motor Apr. 16, 2013
8415907 Motor control method Apr. 9, 2013
8410743 Pulse generating device, rotator module, rotational speed control device, and image forming apparatus Apr. 2, 2013
8378618 Systems and methods for controlling operations of a motor Feb. 19, 2013
8373378 Systems and method for motor speed control Feb. 12, 2013
8373371 Control of an electric machine Feb. 12, 2013
8334667 Permanent magnet rotating electrical machine and permanent magnet motor drive system Dec. 18, 2012
8294411 Sensorless induction motor control device having function of correcting slip frequency of motor Oct. 23, 2012
8294409 Control of pole-change induction motors Oct. 23, 2012
8269450 Winding switching apparatus and winding switching system Sep. 18, 2012
8242719 Connection of an electric motor to a supply network Aug. 14, 2012
8237393 System for measuring fan rotational speed Aug. 7, 2012
8232755 Motor with circuits for protecting motor from input power outages or surges Jul. 31, 2012
8212511 Method and apparatus for limiting torque in an electric drive motor Jul. 3, 2012
8198854 Starting circuit for single-phase AC motor and method for starting single-phase AC motor Jun. 12, 2012
8188700 Apparatus and method for driving sensorless motor May. 29, 2012
8174219 Motor control unit and air conditioner having the same May. 8, 2012
8138709 Control method and system Mar. 20, 2012
8111030 Motor control apparatus and motor control method Feb. 7, 2012
8030878 Motor driving device having power failure detection function Oct. 4, 2011
8022654 Soft start for electric motor of a power tool Sep. 20, 2011
7994750 Systems and methods for controlling a converter for powering a load Aug. 9, 2011
7898207 Method for controlling a DC motor Mar. 1, 2011
7863853 Electric motor control device Jan. 4, 2011
7852026 Motor drive apparatus and motor drive control method Dec. 14, 2010
7847507 Zero-current notch waveform for control of a three-phase, wye-connected H-bridge converter for powering a high-speed electric motor Dec. 7, 2010
7834577 System and method for starting a wound rotor motor Nov. 16, 2010
7821221 Two-phase permanent magnet motor Oct. 26, 2010
7821215 Pump controller system and method Oct. 26, 2010
7808203 Motor control device Oct. 5, 2010
7800339 Drive control assembly for controlling a motor Sep. 21, 2010
7795836 Motor control device, motor control method, and program Sep. 14, 2010
7777442 Method of controlling the speed of an electric motor Aug. 17, 2010
7759897 Method for sensorless estimation of rotor speed and position of a permanent magnet synchronous machine Jul. 20, 2010
7750594 Control of electrical machines Jul. 6, 2010
7701158 Fan system and speed detecting device thereof Apr. 20, 2010
7683566 Fan rotation speed control circuit of power supply system Mar. 23, 2010
7679311 System and method for dynamic field weakening Mar. 16, 2010
7638967 Motor control unit Dec. 29, 2009
7619385 Motor controller, washing machine, air conditioner and electric oil pump Nov. 17, 2009

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