Stepping motor drive circuit

Details Stepping motor drive circuit Stepping motor drive circuit

1981-02-23

1983-11-08

Truhe, J. V.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, G05B 1940

Patent

active

044144989

ABSTRACT:
A bidirectional stepping motor drive circuit receives stepping pulses and a directional control signal. A binary up/down counter counts the stepping pulses in an up or down direction depending on the state of the directional control signal. A BCD to decimal decoder has inputs coupled to the counter and generates selected outputs in response to selected states of the counter. Logic means responds to the selected outputs and generates phase voltage pulses during which current is supplied to the motor coils. A high voltage starting pulse is applied at the beginning of each stepping cycle to establish the coil current.

REFERENCES:
patent: 3797030 (1974-03-01), Katagiri et al.
patent: 3974434 (1976-08-01), Yablonski

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