Battery powered motor speed control apparatus

Details Battery powered motor speed control apparatus Battery powered motor speed control apparatus

1988-09-30

1991-08-13

Shoop, Jr., William M.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388811, 388915, G05B 500

Patent

active

050402358

ABSTRACT:
In a power supply apparatus for driving a DC motor of a car cassette player, there is provided a switching regulator circuit for regulating a DC (direct current) input voltage to produce a desired DC output voltage; a motor driving circuit for driving a motor by receiving the DC output voltage of the switching regulator circuit; a sensor element for sensing a speed of the motor to output a sensor signal; a motor speed judging circuit for comprising a sensor signal from the sensor element with a reference signal to produce a judgement signal; and, a control voltage generating circuit for producing a control voltage based upon the judgement signal of the motor speed judgement circuit, whereby the DC output voltage of the switching regulator circuit is controlled in response to the control voltage.

REFERENCES:
patent: 3710216 (1973-01-01), Smith
patent: 3952236 (1976-04-01), Hoover
patent: 4189667 (1980-02-01), Boxer
patent: 4377777 (1983-03-01), Asagi et al.
patent: 4591768 (1986-05-01), Kudelski
patent: 4635927 (1987-01-01), Shu
patent: 4739230 (1988-04-01), Sonobe et al.

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