Stabilized brushless motor drive circuit

Details Stabilized brushless motor drive circuit Stabilized brushless motor drive circuit

1975-04-09

1976-10-26

Rubinson, Gene Z.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318254, H02K 2900

Patent

active

039886522

ABSTRACT:
A brushless motor drive circuit including at least one hall effect element and a drive transistor circuit adapted to produce a signal to energize at least two drive coils, which coils operate to drive the brushless motor. The amplitude of the signal applied to said drive coils is determined by the current supplied to the drive transistor circuit. A control circuit is provided for controlling said supplied current in response to the speed of the motor. The control circuit includes a single transistor coupled to said drive transistor circuit, the series connection of a constant voltage produced by a voltage limiting device and a voltage representative of motor speed being coupled to the base of the transistor to bias the control transistor to maintain a constant motor speed.

REFERENCES:
patent: 3440506 (1969-04-01), Krestel et al.
patent: 3486099 (1969-12-01), Brunner et al.
patent: 3716769 (1973-02-01), Brunner
patent: 3839661 (1974-10-01), Wada
patent: 3898544 (1975-08-01), Tanikoshi

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