Speed control apparatus for DC motor

Details Speed control apparatus for DC motor Speed control apparatus for DC motor

1978-11-03

1980-11-18

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318331, H02P 516

Patent

active

042348358

ABSTRACT:
Speed control apparatus for DC motor comprising a current mirror circuit including a first transistor 11 and second transistors 12-14 with their bases connected in common, the collectors of the second transistors 12-14 being in-common connected to one end of the DC motor 9 so as to control the motor current, the bases of the transistors being fed with such base current that saturates the transistors, thereby to raise their maximum controlling torque and starting torque of the DC motor.

REFERENCES:
patent: 3803471 (1974-04-01), Price et al.
patent: 3962592 (1976-06-01), Thommen et al.
patent: 3991323 (1976-11-01), Przybylski
patent: 4064448 (1977-12-01), Eatock

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