Drive system for a DC motor with reduced power loss

Details Drive system for a DC motor with reduced power loss Drive system for a DC motor with reduced power loss

1983-07-28

1985-07-02

Miska, Vit W.

Electricity: motive power systems

Switched reluctance motor commutation control

318439, 323207, 363 19, H02P 602

Patent

active

045271020

ABSTRACT:
A high power efficiency drive system for a DC motor which controls the supply of power to polyphase coils has a DC-DC switching converter for changing an output voltage according to an ON-time ratio of the switching transistor, and a switching controller for controlling the ON-time ratio of the switching transistor. The DC-DC switching converter includes a switching transistor for chopping the voltage of a DC voltage source, a filter for smoothing the output voltage of the switching transistor, and a current amplifier for supplying the switching transistor with a base current pulse having a magnitude proportional to an input current. The switching controller controls the operation of the current amplifier for producing the base current pulse of the switching transistor. The system further includes a current detector for detecting the current to the polyphase coils, a current supplier for supplying the current amplifier with the input current corresponding to the detected signal from the current detector, so that the base current of the switching transistor at the ON-time changes corresponding to the current to the polyphase coils.

REFERENCES:
patent: 3839668 (1974-10-01), Black
patent: 3978393 (1976-08-01), Wisner et al.
patent: 4035700 (1977-06-01), Kawasaki et al.
patent: 4070606 (1978-01-01), Morozumi et al.
patent: 4146832 (1979-03-01), McConnell
patent: 4250435 (1981-02-01), Alley et al.
patent: 4359674 (1982-11-01), Gotou
IBM Technical Disclosure Bulletin, "DC to DC Converter", vol. 6, No. 10, pp. 30-31, Mar. 1964.

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