Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1987-08-19
1989-05-09
Shoop, Jr., William M.
Electricity: motive power systems
Open-loop stepping motor control systems
318685, H02P 800
Patent
active
048292222
ABSTRACT:
A driver circuit is under the control of a microprocessor and in communication with a stepper motor. The stepper motor is in driving communication with a mechanism. A power source having a first and second voltage level is in communication with the stepper motor such that the first voltage level is in direct communication with the power terminal of the stepper motor. The second voltage level can be selectively applied to the power terminal of the stepper motor upon instruction of the microprocessor to a gate circuit of the driver circuit. The driver circuit also includes a gating amplifier having a plurality of stages, each stage in communication with a respective one of the stepping terminals of said stepper motor. A coupling circuit means is provided for receiving a series of step commands from said microprocessor and turning "ON" or "OFF" a respective stage of said gating amplifier in accordance with a respective step command in the form of a binary set number.
REFERENCES:
patent: 3893012 (1975-07-01), Lin
patent: 4490665 (1984-12-01), Meyer et al.
patent: 4574228 (1986-03-01), Blue et al.
Hallenbeck Richard A.
Tu Minh Q.
Bergmann Saul M.
Parks, Jr. Charles G.
Pitchenik David E.
Pitney Bowes Inc.
Scolnick Melvin J.
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