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Class Information
Number: 318/696
Name: Electricity: motive power systems > Open-loop stepping motor control systems
Description: Subject matter in which a rotary electric motor; of the type in which the rotary element tends to assume a predetermined angular position when the motor is continuously energized; indexes in discrete angular increments of essentially uniform magnitude as a function of pulse inputs derived from outside the motor.

Patents under this class:

Patent Number Title Of Patent Date Issued
8710778 Control of an electric machine Apr. 29, 2014
8686602 Levitated micro-manipulator system Apr. 1, 2014
8674646 Vehicle display system and motor control device therefor Mar. 18, 2014
8659805 Motor driving control device, image forming apparatus, and image forming method Feb. 25, 2014
8659259 Stepping motor driving apparatus Feb. 25, 2014
8629643 Image forming apparatus having stepping motor arranged in conveying path for paper, and method for controlling stepping motor in image forming apparatus Jan. 14, 2014
8624540 Driving apparatus Jan. 7, 2014
8604744 Motor drive circuit for rotating a rotor by supplying the currents to two coils Dec. 10, 2013
8600698 Method and device for analyzing positions Dec. 3, 2013
8593086 System and method including feed-forward control of a brushless synchronous motor Nov. 26, 2013
8593016 Levitated micro-manipulator system Nov. 26, 2013
8569992 Stepper motor controller and method for controlling same Oct. 29, 2013
8569991 Stepping motor control circuit and analogue electronic watch Oct. 29, 2013
8564230 Method and circuit arrangement for sensorless engine load detection and for controlling the motor current in accordance with the load value in stepper motors Oct. 22, 2013
8558497 Reduced electromagnetic interference for pulse-width modulation Oct. 15, 2013
8547053 Alternating current chopper circuit with low noise Oct. 1, 2013
8547049 DC motor assembly with step adjusting control arrangement Oct. 1, 2013
8541967 Steering control apparatus Sep. 24, 2013
8536821 Redundant interface for a stepper motor Sep. 17, 2013
8513910 Method of returning pointer to origin point Aug. 20, 2013
8508815 Scanner Aug. 13, 2013
8508177 Stepping motor drive device Aug. 13, 2013
8508176 Drive apparatus for stepping motor Aug. 13, 2013
8508161 Drive apparatus Aug. 13, 2013
8487567 Two-phase BLDC motor Jul. 16, 2013
8482241 System and method for using a stepper motor as a rotary sensor Jul. 9, 2013
8472088 Image reading apparatus, image reading method and computer-readable information recording medium Jun. 25, 2013
8471517 Motor controlling apparatus and motor controlling method thereof Jun. 25, 2013
8461795 Motor drive device and electronic device that uses the same Jun. 11, 2013
8441223 Torque control method for high-speed switched reluctance motor May. 14, 2013
8427095 Actuation system with step motor Apr. 23, 2013
8401741 Headlamp in an automobile Mar. 19, 2013
8400099 Meter system with indicator for vehicle Mar. 19, 2013
8390236 Drive system for operating an electric device Mar. 5, 2013
8390235 Method and hardware system for driving a stepper motor in feed-forward voltage mode Mar. 5, 2013
8378616 Motor controller and motor assembly Feb. 19, 2013
8373377 Driving circuit of stepping motor Feb. 12, 2013
8373374 Apparatus equipped with motor and driving method for the motor Feb. 12, 2013
8351303 Stepping motor controller and analog electronic timepiece Jan. 8, 2013
8350515 Stepper motor controller with braking circuit Jan. 8, 2013
8344681 Apparatus and method for minimizing undesirable stepper motor rotor motions Jan. 1, 2013
8341849 Method for operating a display device driven by at least one stepping motor Jan. 1, 2013
8339092 Output contact for feedback in integrated circuit motor driver Dec. 25, 2012
8335135 Stepping motor control circuit and analogue electronic timepiece Dec. 18, 2012
8324845 Rechargeable power tool, control unit and recording medium Dec. 4, 2012
8319468 Stepping motor control circuit and analogue electronic timepiece Nov. 27, 2012
8317156 Metering valve arrangement Nov. 27, 2012
8308161 Motor control apparatus and image forming apparatus Nov. 13, 2012
8299745 Driving control apparatus for stepping motor and image forming apparatus Oct. 30, 2012
8278866 Method and apparatus for accurate positioning of printing units Oct. 2, 2012

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