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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
6262554 Electronic device and method of controlling the same Jul. 17, 2001
6259221 Method and apparatus for tuning motion control system parameters Jul. 10, 2001
6259225 Stepping motor control unit and method, printer employing the same, and information recording medium Jul. 10, 2001
6252371 Driving circuit of stepping motor Jun. 26, 2001
6246205 Driving apparatus for stepping motor Jun. 12, 2001
6229277 Method and apparatus for the damping of motor vibrations May. 8, 2001
6225773 Stepping motor and having external rotor and electromagnetic-combined-permanent magnet stator May. 1, 2001
6211642 Open-loop step motor control system Apr. 3, 2001
6208107 Use of digital current ramping to reduce audible noise in stepper motor Mar. 27, 2001
6194862 Control device for stepper motor, control method for the same, and timing device Feb. 27, 2001
6194863 Method and apparatus for driving a stepping motor Feb. 27, 2001
6184646 Stepping motor control unit and image forming apparatus Feb. 6, 2001
6181235 Rotary apparatus Jan. 30, 2001
6172942 Analog electronic watch Jan. 9, 2001
6167873 Apparatus for controlling EGR valve of diesel engine and method Jan. 2, 2001
6166510 Image forming apparatus Dec. 26, 2000
6163126 Electronic device Dec. 19, 2000
6160330 Three-phase stepping motor and driving method therefor Dec. 12, 2000
6160630 Image reading apparatus Dec. 12, 2000
6153953 Multi-phase PM-type stepping motor Nov. 28, 2000
6150782 Process for detecting abutment and blocking in an electric motor Nov. 21, 2000
6150788 Load torque detection and drive current optimization determination met Nov. 21, 2000
6150789 Stepper motor control Nov. 21, 2000
6144184 Motor controlling method and apparatus Nov. 7, 2000
6140793 Stepper motor controller for microstepping a stepper motor and a method for microstepping a stepper motor Oct. 31, 2000
6141110 Image forming apparatus and method for controlling multi-phase stepping motor for use in image forming apparatus Oct. 31, 2000
6137252 Controller of a stepping motor, control method for the motor and timing device Oct. 24, 2000
6127796 Method and device for driving a self-timing stepping motor Oct. 3, 2000
6124651 Method for driving stepping motor of multiphase hybrid type Sep. 26, 2000
6124696 Programmable stepper motor controller and method therefor Sep. 26, 2000
6121745 Direct current command generation for a stepper motor drive Sep. 19, 2000
6118246 Phase synchronization of redundant motor windings Sep. 12, 2000
6118945 Lens control apparatus Sep. 12, 2000
6119046 Method of controlling a chopper driver and a circuit arrangement for executing the method Sep. 12, 2000
6114782 Two-phase hybrid step motor driven by three-phase driver Sep. 5, 2000
6114826 Stepping motor driving apparatus having small time constant regenerative current path Sep. 5, 2000
6115149 Motor-speed control apparatus for scanners with a movable scan head Sep. 5, 2000
6111380 System for detecting abutment and blocking in a stepped motor Aug. 29, 2000
6111385 Driving method using motor and its driving apparatus, exchanging apparatus of recording medium, and driving method of exchanging apparatus of recording medium Aug. 29, 2000
6108279 Stepping motor control device and method thereof and timepiece Aug. 22, 2000
6104113 Coil assembly for sensorless rotor angular position control of single phase permanent magnet motor Aug. 15, 2000
6087798 Semiconductor integrated circuit device and disk drive apparatus Jul. 11, 2000
6081091 Motor controller, integrated circuit, and method of controlling a motor Jun. 27, 2000
6078457 Driving method for a stepping motor Jun. 20, 2000
6073689 Actuator control apparatus Jun. 13, 2000
6075336 Drive mechanism for stepping motor in printer Jun. 13, 2000
6072656 Stepping motor control method Jun. 6, 2000
6069466 Method for driving opening/closing member May. 30, 2000
6069726 Optical scanner May. 30, 2000
6065231 Motor drive method and drive circuit May. 23, 2000

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