Stepping motor control circuit

Details Stepping motor control circuit Stepping motor control circuit

1977-08-10

1978-12-12

Rubinson, Gene Z.

Electricity: motive power systems

Open-loop stepping motor control systems

H02K 3700

Patent

active

041298160

ABSTRACT:
A stepping motor is described having two operative modes, the first mode being a normal rotary mode and the second a stationary mode. During rotary operation, the induced energy created by interruption of the current flow through the energized phase winding is dissipated quickly by a zener diode connected across the winding. In the stationary mode, a pulsed current is fed to one of the phase windings of the motor to assure stationary positioning of the rotor. During stationary operation, the zener diode is shunted with a second conventional diode providing a low impedance path to the current induced in the phase winding upon de-energization. This low impedance path greatly reduces the energy dissipated during the off condition of the pulsed current thereby greatly reducing motor power requirements during stationary operation.

REFERENCES:
patent: 3573593 (1971-04-01), Beery
patent: 3746959 (1973-07-01), Kobayashi et al.
patent: 3760252 (1973-09-01), Beery
patent: 3893012 (1975-07-01), Lin
patent: 3967179 (1976-06-01), Loyzim

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