Drive circuit for brushless DC motors

Details Drive circuit for brushless DC motors Drive circuit for brushless DC motors

1992-10-05

1996-12-10

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, H02K 2300

Patent

active

055834043

ABSTRACT:
A drive circuit for brushless DC motors comprising a rotor and a stator with at least one stator coil includes a commutation device which supplies commutation pulses of drive current to the stator coil(s). The commutation device senses the rotor position and calculates current rotor speed therefrom. The rotor speed is then used to shift the commutation currents according to predetermined functions. The shifting of commutation currents is occasioned by shifting either or both of the ignition part of a commutation pulse and the extinction part of such pulses.

REFERENCES:
patent: 4119895 (1978-10-01), Muller
patent: 4803408 (1989-02-01), Uhde et al.
patent: 4804892 (1989-02-01), Muller
patent: 5043643 (1991-08-01), Hedlund et al.
patent: 5227704 (1993-07-01), Erdman

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