Bridge circuit for driving a brushless DC motor

Details Bridge circuit for driving a brushless DC motor Bridge circuit for driving a brushless DC motor

1993-07-13

1997-02-04

Sircus, Brian

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318293, 3889072, H02P 104

Patent

active

056002165

ABSTRACT:
The invention pertains to a bridge circuit and a drive circuit for it, in particular for driving a brushless DC motor. The bridge circuit exclusively consists of n-channel field-effect transistors. An auxiliary potential generated by at least one potential sliding capacitor is provided for driving these particular field-effect transistors which are connected to the positive supply voltage. The auxiliary potential is already built up before the starting of the motor by means of special switching measures, and said auxiliary potential exists at a defined intensity during extended standstill times of the motor.

REFERENCES:
patent: 4319170 (1982-03-01), Brent
patent: 4651269 (1987-03-01), Matsumura
patent: 4680513 (1987-07-01), Kennedy
patent: 4705997 (1987-11-01), Juzswik
patent: 4985666 (1991-01-01), Nakabayashi
patent: 5111375 (1992-05-01), Marshall

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