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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:
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Patent Number Title Of Patent Date Issued
4634948 Stepping motor winding for bipolar drive Jan. 6, 1987
4634949 Control devices for use with a stepping motor Jan. 6, 1987
4635205 Microprocessor controlled d.c. motor for indexing postage value changing means Jan. 6, 1987
4633156 Stepping motor assembly Dec. 30, 1986
4633346 Magnetic head positioning device for a flexible disk Dec. 30, 1986
4631466 Phase locked stepper motor controlled light chopper Dec. 23, 1986
4631657 Control and force-sensing method and apparatus for motors Dec. 23, 1986
4631681 Microprocessor controlled d.c. motor and application therefor Dec. 23, 1986
4630210 Microprocessor controlled d.c. motor for controlling a load Dec. 16, 1986
4628239 Dual optical mechanical position tracker Dec. 9, 1986
4625667 Sewing machine with a step motor for feed control Dec. 2, 1986
4626758 Digital valve control apparatus Dec. 2, 1986
4626760 Control circuit for a stepping motor Dec. 2, 1986
4623828 Multiple phase stepper motor torque control apparatus and method Nov. 18, 1986
4622505 Device for controlling rotation of stepping motor Nov. 11, 1986
4618808 Electromagnetic actuator system using stepper motor with closed loop position sensing, electronic commutation and dynamic position and anomaly correction Oct. 21, 1986
4613806 Stepper motor logic circuit Sep. 23, 1986
4613962 Tracking device with linear motor Sep. 23, 1986
4612588 Head moving apparatus using stepping motor Sep. 16, 1986
4611157 Switched reluctance motor drive operating without a shaft position sensor Sep. 9, 1986
4608958 Load reactance element driving device Sep. 2, 1986
4609857 Pulse motor driving circuit for floppy disc Sep. 2, 1986
4609953 Disk unit Sep. 2, 1986
4607204 Five-phase stepping motor Aug. 19, 1986
4602882 Control system of serial printer Jul. 29, 1986
4603287 Method of driving 5-phase stepping motor Jul. 29, 1986
4602197 Stepping motor control system Jul. 22, 1986
4600868 Open loop acceleration/deceleration control for disk drive stepper motors Jul. 15, 1986
4595871 Stepping motor of hybrid multi-phase type and device for its control Jun. 17, 1986
4594620 Disk storage file with a four phase, single phase drive stepping motor Jun. 10, 1986
4590970 Pulse width modulated pressure source May. 27, 1986
4591774 High performance incremental motion system using a closed loop stepping motor May. 27, 1986
4589790 Method and apparatus for controlling escapement May. 20, 1986
4590412 Method of energizing a stepping motor May. 20, 1986
4586808 Optical system drive for image formation apparatus May. 6, 1986
4587473 Stepper motor control circuit May. 6, 1986
4584506 Reluctance motor with electronically controlled stator windings Apr. 22, 1986
4584512 Microstepping drives with waveform tuning and microprocessor control Apr. 22, 1986
4584513 Motor/generator operating on the reluctance principle Apr. 22, 1986
4583033 Speed control device for stepping motor Apr. 15, 1986
4581567 Device for feeding magnetic head Apr. 8, 1986
4580087 Stepping motor control circuit Apr. 1, 1986
4574225 Apparatus for accommodating inductive flyback in pulsed motor windings Mar. 4, 1986
4574228 Current controlled motor drive circuit Mar. 4, 1986
4573001 Coil density modulation Feb. 25, 1986
4568171 System for controlling the reciprocation of a scanning arrangement Feb. 4, 1986
4568866 Programmable controller for stepping motor control Feb. 4, 1986
4568867 Method for reducing the consumption of a stepping motor and device for carrying out the method Feb. 4, 1986
4567418 Operation control apparatus for robots Jan. 28, 1986
4567434 Analog display device, particularly a tachometer Jan. 28, 1986

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