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Class Information
Number: 318/434
Name: Electricity: motive power systems > Limitation of motor load, current, torque or force (e.g., preventing overload)
Description: Subject matter in which means are provided for preventing the load connected or applied to the motor, the armature or primary current of the motor, the watts supplied to the motor, or the torque or force exerted by the motor from merely exceeding a predetermined maximum or predetermined minimum value.

Patents under this class:

Patent Number Title Of Patent Date Issued
8710782 Parallel power inverter motor drive system Apr. 29, 2014
8692496 Method and apparatus for initializing an electric power control scheme Apr. 8, 2014
8686675 Power tool Apr. 1, 2014
8686673 Control device for electric rotary machine Apr. 1, 2014
8686672 Motor control device and electric power steering device Apr. 1, 2014
8681457 Power source system for electric powered vehicle and control method therefor Mar. 25, 2014
8674650 Method for controlling of an AC induction motor Mar. 18, 2014
8669724 Method and apparatus for load dependent speed control of a motor Mar. 11, 2014
8666605 Securing the assistance torque by means of an estimator of the force on the rack Mar. 4, 2014
8659805 Motor driving control device, image forming apparatus, and image forming method Feb. 25, 2014
8651227 Motor control device and electric power steering device Feb. 18, 2014
8636079 Method of operating a rotary tool Jan. 28, 2014
8633664 Motor control apparatus Jan. 21, 2014
8629638 Lock protection and standby mode control circuit of motor driving apparatus Jan. 14, 2014
8629634 Apparatus and method for optimizing current use during control of multiple motors Jan. 14, 2014
8626373 Fuel cell system and control method of same Jan. 7, 2014
8618761 Method for controlling motor operation using information characterizing regions of motor operation Dec. 31, 2013
8610390 Method and apparatus for controlling torque of an electric motor driven vehicle Dec. 17, 2013
8605393 Compressor protection and grid fault detection device Dec. 10, 2013
8604743 Method for operating an electric window lift of a convertible Dec. 10, 2013
8604737 Systems and methods for protecting three-phase motors Dec. 10, 2013
8602743 Method of operating a safety vacuum release system Dec. 10, 2013
8598824 Motor drive circuit Dec. 3, 2013
8598819 Motor control Dec. 3, 2013
8598815 Controllable transverse rotation adaptor Dec. 3, 2013
8593094 Power conversion apparatus of electric vehicle Nov. 26, 2013
8589007 Fuel cell system and control method of same Nov. 19, 2013
8587243 Drive control system Nov. 19, 2013
8587237 Control device Nov. 19, 2013
8581541 Motor drive with configurable signal conditioning apparatus and method Nov. 12, 2013
8564234 Driving circuits, power devices and electric devices including the same Oct. 22, 2013
8564227 Method and device for activating a control element of a drive apparatus, said control element having a response delay Oct. 22, 2013
8560183 Controlling a digging operation of an industrial machine Oct. 15, 2013
8559143 Vehicle control system Oct. 15, 2013
8558497 Reduced electromagnetic interference for pulse-width modulation Oct. 15, 2013
8558492 Apparatus for driving motor of electric vehicle Oct. 15, 2013
8554411 Electric power steering system Oct. 8, 2013
8547044 Determining the rotor angle of a synchronous machine at standstill with the aid of iterative test pulses Oct. 1, 2013
8547042 Method and device for determining the motor constant of an electric motor Oct. 1, 2013
8547040 Control apparatus of electric vehicle Oct. 1, 2013
8536814 Limiting peak electrical power drawn by mining excavators Sep. 17, 2013
8520394 Control device Aug. 27, 2013
8519657 Fuel cell drive system Aug. 27, 2013
8515637 Machine control system and method Aug. 20, 2013
8499885 Motor drive apparatus Aug. 6, 2013
8497651 Open phase detection system and method for three-phase motor Jul. 30, 2013
8497649 Motor driving control apparatus for controlling motor output according to power characteristics of AC power supply Jul. 30, 2013
8497645 Control device for electric motor drive device Jul. 30, 2013
8493016 Semiconductor circuit device including switching element Jul. 23, 2013
8487561 Softstarter device and method to control the softstarting of an electric motor Jul. 16, 2013

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