Motor driving system and circuit therefor

Details Motor driving system and circuit therefor Motor driving system and circuit therefor

1976-02-11

1977-06-21

Dobeck, B.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, 318341, G05B 1940

Patent

active

040314480

ABSTRACT:
A system for driving a bipolar stepping motor by a pair of pulse driving currents wherein an output level of a control circuit is selected depending on one of the pulse drive currents applied just prior to the stoppage of the motor by a reset signal, switching of a set of signal transmitting paths for connecting between a reference signal generating circuit and a motor drive circuit is selected depending on an output level of the control circuit, that one of a pair of reference signals produced by the reference signal generating circuit during the operation of the motor which first appears after the release of the stop causes production of the other of the pulse drive currents by the selected path, and a predetermined time period after the release of the stop the pulse drive current of opposite polarity to that of the pulse drive current being applied to the motor which is just about to stop is applied to the motor to positively re-start the operation of the motor at a predetermined time.

REFERENCES:
patent: 3958167 (1976-05-01), Nakajima et al.
patent: 3963946 (1976-06-01), Zajac
patent: 3965406 (1976-06-01), Yablonski

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