Stepping motor driving circuit

Details Stepping motor driving circuit Stepping motor driving circuit

1983-09-13

1985-04-16

Shoop, William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02K 2904

Patent

active

045118337

ABSTRACT:
A motor driving circuit includes first and second transistors whose collectors are respectively connected to each one end of a pair of motor coils and whose emitters are grounded through a first resistor, and which are alternately turned on, a switching circuit connected between the other ends of the pair of motor coils and a power supply terminal, and a comparator which receives a reference voltage and a voltage drop across the first resistor respectively at its first and second input terminals and controls the conduction state of the switching circuit in accordance with the result of comparison between two input voltages. A second resistor and a capacitor are connected in series between the output terminal and the second input terminal of the comparator.

REFERENCES:
patent: 4358725 (1982-11-01), Brendemuehl
patent: 4369443 (1983-01-01), Giallanza et al.
IBM Technical Disclosure Bulletin vol. 22 No. 12, May 1980 pp. 5243-5250 Bateson et al.

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