H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/89, 318/96
H02P 7/29 (2006.01) H02P 7/28 (2006.01)
Patent
CA 1296763
ABSTRACT OF THE DISCLOSURE In a power supply apparatus for driving a DC motor of a car cassette player, there are 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 comparing said 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.
578996
Mitsubishi Denki Kabushiki Kaisha
Robic
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