Step motor drive circuit

Details Step motor drive circuit Step motor drive circuit

1986-07-10

1988-07-12

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, 318567, H02P 800

Patent

active

047572469

ABSTRACT:
A drive circuit for a step motor having a multi-phase winding arrangement comprises means for generating a control signal which represents a fixed value during acceleration and deceleration periods of the step motor and functions as repetition pulses during a constant speed period thereof, switch means responsive to the control signal from the control signal generator means, power supply means responsive to an on-off operation of the switch means to deliver a drive current to respective phase windings of the step motor, and comparator means for comparing an actual current flowing through each of said phase windings with a reference value to deliver an output indicative of a compared result to the switch means.

REFERENCES:
patent: 4107593 (1978-08-01), Anderson
patent: 4600868 (1986-07-01), Bryant

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