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Class Information
Number: 318/808
Name: Electricity: motive power systems > Induction motor systems > Primary circuit control > Frequency control > With voltage magnitude control
Description: Subject matter wherein means are also provided to regulate the magnitude of the voltage applied to the primary member of the motor.










Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8605393 Compressor protection and grid fault detection device Dec. 10, 2013
8587239 Apparatus and method for sensorless identification of rotating electrical equivalent circuit parameters of a three-phase asynchronous motor Nov. 19, 2013
8570003 Double fed induction generator converter and method for suppressing transient in deactivation of crowbar circuit for grid fault ridethrough Oct. 29, 2013
8550196 Multiple induction electric motor and vehicle Oct. 8, 2013
8497649 Motor driving control apparatus for controlling motor output according to power characteristics of AC power supply Jul. 30, 2013
8456115 Method and system for controlling an electric motor with variable switching frequency at variable operating speeds Jun. 4, 2013
8432118 Inverter and a method for controlling an electric machine Apr. 30, 2013
8390229 Washing machine with improved method of braking to a non-zero speed Mar. 5, 2013
8314577 Energy converter and electromechanical apparatus Nov. 20, 2012
8294413 Induction motor control systems and methods Oct. 23, 2012
8283880 Motor drive device with function of switching to power regenerative operation mode Oct. 9, 2012
8283885 Driver circuit Oct. 9, 2012
8278865 Control device Oct. 2, 2012
8264209 Method of and apparatus for operating a double-fed asynchronous machine in the event of transient mains voltage changes Sep. 11, 2012
8258734 Energy converter and electromechanical apparatus Sep. 4, 2012
8248013 Fan device with improved speed control module and plural fan system constructed thereby Aug. 21, 2012
8237396 Motor driving device, and control method of motor driving device Aug. 7, 2012
8217597 Drive circuit for a capacitive load Jul. 10, 2012
8209057 System and method for forming universal control panel Jun. 26, 2012
8207701 Control method of electromotor Jun. 26, 2012
8164297 Power converter and motor driving system Apr. 24, 2012
8159168 Rotor position estimator for an electrical machine Apr. 17, 2012
8143840 Device for controlling induction motor Mar. 27, 2012
8106620 Vector control device for alternating-current electric motor Jan. 31, 2012
8102142 Double ended inverter system for a vehicle having two energy sources that exhibit different operating characteristics Jan. 24, 2012
8084986 Dead-time compensation apparatus of PWM inverter and method thereof Dec. 27, 2011
8080957 Motor control device and motor-driven power steering system using the same Dec. 20, 2011
8072181 Controller for electrically adjustable furniture Dec. 6, 2011
8026691 Double ended inverter system with a cross-linked ultracapacitor network Sep. 27, 2011
8022659 Control apparatus for AC rotary machine and control method for AC rotary machine Sep. 20, 2011
7969039 Method of controlling fuel cell vehicle and method of controlling DC/DC converter apparatus Jun. 28, 2011
7956569 Double ended inverter system with an impedance source inverter subsystem Jun. 7, 2011
7835630 Adaptive and reconfigurable system for DC motor control Nov. 16, 2010
7830642 Disc apparatus Nov. 9, 2010
7821224 Voltage estimation feedback of overmodulated signal for an electrical vehicle Oct. 26, 2010
7808203 Motor control device Oct. 5, 2010
7755319 Apparatus, systems, and methods for reducing voltage source inverter losses Jul. 13, 2010
7710066 Motor control device May. 4, 2010
7684900 Adaptive provision of protection function settings of electrical machines Mar. 23, 2010
7679311 System and method for dynamic field weakening Mar. 16, 2010
7626836 Method and apparatus for adjustable voltage/adjustable frequency inverter control Dec. 1, 2009
7609024 Auxiliary bus method Oct. 27, 2009
7545115 Motor control and driver for electric boosting application Jun. 9, 2009
7501787 Method for controlling AC motor Mar. 10, 2009
7479757 System and method for a cooling system Jan. 20, 2009
7466906 Motor control apparatus Dec. 16, 2008
7463006 Motor and drive control device therefor Dec. 9, 2008
7459877 Solid state reversing AC motor starter with DC power source Dec. 2, 2008
7451609 Method of controlling compressor and controller Nov. 18, 2008
7432683 PWM pattern sequence to reduce losses in voltage source inverters Oct. 7, 2008

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