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Class Information
Number: 318/685
Name: Electricity: motive power systems > Positional servo systems (e.g., servomechanisms) > With particular motor control system responsive to the "actuating signal" > "step-by-step" motors in closed-loop servos
Description: Subject matter in which the particular motor control is used to control a "Step-by-step" or stepping motor; and the servo loop is closed by feeding back a position signal from the motor shaft back to the servo input.

Patents under this class:

Patent Number Title Of Patent Date Issued
8692492 Lead angle value setting method, motor driving control circuit, and brushless motor Apr. 8, 2014
8674646 Vehicle display system and motor control device therefor Mar. 18, 2014
8669728 Angle detection apparatus and method for rotor of motor Mar. 11, 2014
8604744 Motor drive circuit for rotating a rotor by supplying the currents to two coils Dec. 10, 2013
8593086 System and method including feed-forward control of a brushless synchronous motor Nov. 26, 2013
8569992 Stepper motor controller and method for controlling same Oct. 29, 2013
8547053 Alternating current chopper circuit with low noise Oct. 1, 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
8508175 Driver circuit Aug. 13, 2013
8497653 Driver circuit for driving a stepping motor Jul. 30, 2013
8482241 System and method for using a stepper motor as a rotary sensor Jul. 9, 2013
8471502 Vibration damping apparatus, electric actuator driving apparatus and vehicle Jun. 25, 2013
8427095 Actuation system with step motor Apr. 23, 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
8378612 Control system and method of operating a massage device Feb. 19, 2013
8373374 Apparatus equipped with motor and driving method for the motor Feb. 12, 2013
8368341 Head up display device for vehicle Feb. 5, 2013
8362734 Stepping motor driver Jan. 29, 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
8339092 Output contact for feedback in integrated circuit motor driver Dec. 25, 2012
8319468 Stepping motor control circuit and analogue electronic timepiece Nov. 27, 2012
8317156 Metering valve arrangement Nov. 27, 2012
8301276 Control device for the position control of a hydraulic cylinder unit comprising a linearization unit Oct. 30, 2012
8278866 Method and apparatus for accurate positioning of printing units Oct. 2, 2012
8278851 Drive apparatus having a stepping motor Oct. 2, 2012
8277304 Aligning a gaming machine reel to a home position Oct. 2, 2012
8258782 Angle detecting apparatus and angle detecting method Sep. 4, 2012
8253354 Method and apparatus for transferring signal data Aug. 28, 2012
8242732 Apparatus, system and method for stepper motor stall detection Aug. 14, 2012
8222854 Optical apparatus Jul. 17, 2012
8203301 Temperature monitoring system for the entire region of environment Jun. 19, 2012
8179081 Driver circuit May. 15, 2012
8174226 Current limit control method of DC motor and related device and circuit May. 8, 2012
8174223 Method of detecting state of synchronization loss in stepping motor May. 8, 2012
8172199 Valve control apparatus and flow rate controller May. 8, 2012
8169171 Drive apparatus May. 1, 2012
8159176 Motor driving device Apr. 17, 2012
8148933 Circuit arrangement for load-dependent control of current flow time in motor windings of self-timed bipolar stepper motors Apr. 3, 2012
8129934 Motor driver supplying drive current while adjusting decay rate thereof Mar. 6, 2012
8125174 Motor driven electronic apparatus Feb. 28, 2012
8111032 Indicating instrument for vehicle Feb. 7, 2012
8102139 Indicating instrument for vehicle Jan. 24, 2012
8093853 Device-positioning pedestal and handler having the device-positioning pedestal Jan. 10, 2012

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