Constant-current control circuit for a stepped motor of single-p

Details Constant-current control circuit for a stepped motor of single-p Constant-current control circuit for a stepped motor of single-p

1986-07-11

1988-04-26

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

047407379

ABSTRACT:
A constant-current control circuit for a stepped motor of unipolar excitation. First and second switch devices are connected to phase and complementary phase inputs of the motor, respectively, and are responsive to a control signal. A sensor is connected to the switch devices to provide a sensor signal indicative of the current flowing in the phase or complementary phase input, and a generator means is included to provide a constant reference signal. Regulating and comparison means is included to compare the sensor signal and the reference signal, and regulate the current conducted by the switch devices in response thereto.

REFERENCES:
patent: 4036186 (1977-07-01), Hattori et al.
patent: 4285319 (1981-08-01), Hattori et al.
patent: 4336484 (1982-06-01), Marinko
patent: 4347821 (1982-07-01), Saito
patent: 4439717 (1984-03-01), Binney
patent: 4453194 (1984-06-01), Frankeny et al.
patent: 4471283 (1984-09-01), Presley
patent: 4506207 (1985-03-01), Ferrari

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