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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
4757246 Step motor drive circuit Jul. 12, 1988
4757247 Single step stepping motor controller Jul. 12, 1988
4755732 Microangle drive system for stepping motor and microangle drive circuit therefor Jul. 5, 1988
4754210 Method of and a device for controlling a stepping motor Jun. 28, 1988
4751445 Stepping motor control device Jun. 14, 1988
4749930 High speed positive feed drill motor open loop control system Jun. 7, 1988
4749931 Coil current control device Jun. 7, 1988
4746847 Control system for a stepping motor May. 24, 1988
4746849 Two lead bidirectional stepping motor control May. 24, 1988
4743824 Method and apparatus for controlling a motor May. 10, 1988
4743848 Method of testing a stepping motor May. 10, 1988
4742287 Motor driving device for printer May. 3, 1988
4740737 Constant-current control circuit for a stepped motor of single-pole type, particularly for use in motor vehicles Apr. 26, 1988
4738209 Work material feeding device for sewing machine Apr. 19, 1988
4739239 Bipolar motor control Apr. 19, 1988
4739240 Commutator for switched reluctance drive Apr. 19, 1988
4739346 Drive system and method for ink jet printer Apr. 19, 1988
4737700 Method and circuit for driving a stepping motor Apr. 12, 1988
4734631 Step motor control Mar. 29, 1988
4734847 Microstepping motor controller circuit Mar. 29, 1988
4733113 Winding for operation of a three-phase stepping motor from a two-phase drive Mar. 22, 1988
4731570 Electrical drive circuit for a variable-speed switched reluctance motor Mar. 15, 1988
4727304 Phase sequencer for stepping motor Feb. 23, 1988
4723855 Compact printer Feb. 9, 1988
4724372 Speed control apparatus of hydraulic actuator Feb. 9, 1988
4723103 Control equipment for an electro-magnetic linear motor Feb. 2, 1988
4721896 Drive controlled by a sequence of pulses Jan. 26, 1988
4720726 Shutter driving apparatus Jan. 19, 1988
4717866 Stepping motor excitation sequences Jan. 5, 1988
4715725 Step motor control mechanism for electronic timepiece Dec. 29, 1987
4714361 Stepper motor homing method and system Dec. 22, 1987
4714867 Method and apparatus for controlling a stepper motor with a programmable parabolic velocity profile Dec. 22, 1987
4713594 Start-up control for switched reluctance motor Dec. 15, 1987
4710690 Closed-loop control system for a stepping motor Dec. 1, 1987
4710691 Process and apparatus for characterizing and controlling a synchronous motor in microstepper mode Dec. 1, 1987
4709199 Velocity feedback control of step motors Nov. 24, 1987
4706456 Method and apparatus for controlling hydraulic systems Nov. 17, 1987
4707649 Motor controlling system Nov. 17, 1987
4707650 Control system for switched reluctance motor Nov. 17, 1987
4706008 Self-adjusting homing for a stepping motor Nov. 10, 1987
4703242 Control method and apparatus for positioning servo system Oct. 27, 1987
4703243 Stepping motor harmonic suppression Oct. 27, 1987
4703244 Pulse motor control apparatus Oct. 27, 1987
4701687 Controller for energization of a stepper motor Oct. 20, 1987
4700120 Control for a stepper motor or other synchronous motor Oct. 13, 1987
4700321 Timing signal generator Oct. 13, 1987
4697129 Stepping motor drive system and method capable of stopping the rotor in a required angular position Sep. 29, 1987
4692674 Brushless DC motor control system responsive to control signals generated by a computer or the like Sep. 8, 1987
4692679 Pulse motor Sep. 8, 1987
4691153 Method of controlling positioning of rotor of stepping motor Sep. 1, 1987

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