Low-power dual voltage drive circuit and method

Details Low-power dual voltage drive circuit and method Low-power dual voltage drive circuit and method

1991-05-03

1993-06-22

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318695, G05B 1940

Patent

active

052218856

ABSTRACT:
A low-power dual voltage drive circuit and method which includes controlling a stepper motor overdriven with a high voltage. The stepper motor drive circuit includes a high voltage supply for overdriving the stepper motor, a low voltage supply, and an overdrive switch mechanism connected between the high voltage supply means and the stepper motor input. The method includes repetitively triggering the overdrive switch in response to a control signal, overdriving the stepper motor with the high voltage, producing an overdrive current, sensing the overdrive current, producing an additional control signal when the overdrive current reaches a preset value, switching off the overdrive current in response to the second control signal, resetting the overdrive switch to enable the overdrive switch to again receive the first control signal, and driving the stepper motor with a nominal low voltage.

REFERENCES:
patent: 4829222 (1989-05-01), Hallenbeck et al.
patent: 4918365 (1990-04-01), Tanuma et al.
patent: 4928049 (1990-05-01), Pietrobon et al.
patent: 5034674 (1991-07-01), Sato

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