Stepping motor driver circuit

Details Stepping motor driver circuit Stepping motor driver circuit

1993-03-18

1994-02-22

Wysocki, Jonathan

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

052890988

ABSTRACT:
A stepping motor driver circuit first and second push-pull circuits having first and second output terminals, respectively, first and second driving circuits for driving the first and second push-pull circuits in opposite phases relative to each other, respectively, and first and second holding circuits for driving the first and second push-pull circuits, respectively, so that the output voltage between the first and second output terminals may be reduced to a predetermined holding voltage when a predetermined load is held. Here, each of the first and second holding circuits includes a constant-current source for setting a predetermined constant current, a constant-voltage source for supplying a predetermined reference voltage to set the holding voltage, and an amplifier circuit of the current feedback type for inputting the reference voltage and operating with the constant current.

REFERENCES:
patent: 3577176 (1971-05-01), Kreithen et al.
patent: 3728598 (1973-04-01), May
patent: 3842332 (1974-10-01), Heine et al.
patent: 4035708 (1977-07-01), Schaff
patent: 4100471 (1978-07-01), Pritchard
patent: 4584506 (1986-04-01), Kaszmann
patent: 4587473 (1986-05-01), Turvey
patent: 4803415 (1989-02-01), Sepsey

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