Speed control apparatus for d.c. motor

Details Speed control apparatus for d.c. motor Speed control apparatus for d.c. motor

1983-05-27

1985-07-02

Weldon, Ulysses

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318345F, 318345B, G05B 500

Patent

active

045271046

ABSTRACT:
A speed control apparatus for a d.c. motor includes a bridge circuit which operates to detect a speed error signal. The speed error signal is applied to a Schmidt trigger circuit, an output of which is used to cause a switching operation of a power supply circuit for the motor in order to control the speed thereof. The apparatus minimizes power dissipation and improves efficiency.

REFERENCES:
patent: 3475672 (1969-10-01), Oltendorf
patent: 3560828 (1971-02-01), Kobayashi et al.
patent: 3624474 (1971-11-01), Nolf
patent: 3710219 (1973-01-01), Takahashi et al.
patent: 3777244 (1973-12-01), Kosaka
patent: 4048549 (1977-09-01), Satoh
patent: 4151450 (1979-04-01), Fukuma et al.
patent: 4163182 (1979-07-01), Tanikoshi

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