Driving circuit for a stepping motor

Details Driving circuit for a stepping motor Driving circuit for a stepping motor

1980-09-12

1982-12-07

Smith, Jr., David

Electricity: motive power systems

Open-loop stepping motor control systems

318138, G05B 1940

Patent

active

043629814

ABSTRACT:
A driving circuit for a stepping motor has a pair of emitter-connected PNP transistors with the common junction point of the emitters connected to a source voltage. A pair of source-connected static induction transistors each has its drain connected to the collector of one PNP transistor with the connection point being connected to one side of the drive coil of the motor. The leak current characteristic of the static induction transistors along their drain-to-source paths is chosen so that sufficient leak current flows when all four transistors are simultaneously in the OFF state to effectively dampen the motor.

REFERENCES:
patent: 4200879 (1980-04-01), Nonaka et al.
patent: 4205334 (1980-05-01), Nonaka et al.
patent: 4227135 (1980-10-01), Kawamura
patent: 4241433 (1980-12-01), Ueda et al.
patent: 4242623 (1980-12-01), Outet et al.

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