DC brushless motor driving device, DC brushless motor, and image

Details DC brushless motor driving device, DC brushless motor, and image DC brushless motor driving device, DC brushless motor, and image

1995-04-24

1997-03-18

Ip, Paul

Electricity: motive power systems

Switched reluctance motor commutation control

318599, 318696, H02P 600

Patent

active

056125992

ABSTRACT:
A device for driving a DC motor includes a velocity control circuit generating a velocity control signal, a modulation circuit deriving a velocity control pulse signal having a pulse width modulated by the velocity control signal, a switching circuit, and a current-flow switching circuit. The switching circuit includes field effect transistors performing a switching operation, and a capacitor coupled between a power supply terminal and a reference potential. The capacitor absorbs a counter current caused in driving coils of the DC motor due to the switching operation.

REFERENCES:
patent: 3750000 (1973-07-01), Bruckner et al.
patent: 3989992 (1976-11-01), Schmidt
patent: 4005347 (1977-01-01), Erdman
patent: 4169990 (1979-10-01), Lerdman
patent: 4533861 (1985-08-01), Rogers et al.
patent: 4638223 (1987-01-01), Tajima et al.
patent: 5017800 (1991-05-01), Divan
patent: 5027048 (1991-06-01), Masrur et al.

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