Transistor motor control

Details Transistor motor control Transistor motor control

1981-08-12

1983-10-11

Weldon, Ulysses

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318311, H02P 506

Patent

active

044095279

ABSTRACT:
Transistor motor control incorporates a transistor bridge circuit for controlling application of power to a DC motor for forward and reverse rotation. The speed of the motor is controlled by pulse modulation, under the control of a digital counter. The counter produces a voltage stair-step waveform which is compared with a feed-back voltage. The direction of motor energization is controlled by the sign of the feed-back signal, and the transistors of the bridge are inhibited for at least one cycle prior to reversing direction.

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patent: 3989992 (1976-11-01), Schmidt
patent: 4072883 (1978-02-01), Beiter
patent: 4146827 (1979-03-01), Krohn

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