Brushless motor drive circuit

Details Brushless motor drive circuit Brushless motor drive circuit

1994-09-30

1997-08-19

Masih, Karen

Electricity: motive power systems

Switched reluctance motor commutation control

318139, 318138, 318632, 318647, 318653, 318678, H02K 2300

Patent

active

056592302

ABSTRACT:
A brushless motor drive circuit which can suppress switching pulses without using capacitors or other external components is provided. The brushless motor drive circuit has a hall element for generating two sinusoidal signals of opposite phase and a switching circuit which separates the two sinusoidal signals and cuts off the negative portion to produce two half cycle signals. The two half cycle signals are combined in the switching circuit, and the combined signal is applied to an automatic gain control circuit for providing a stable current to the hall element.

REFERENCES:
patent: 3839661 (1974-10-01), Wada
patent: 4030005 (1977-06-01), Doemen
patent: 4631459 (1986-12-01), Fujioka et al.
patent: 5134682 (1992-07-01), Muller
patent: 5220257 (1993-06-01), Yoshino et al.
patent: 5289089 (1994-02-01), Aoki
patent: 5349275 (1994-09-01), Muller
Y. Tanaka, "Research on Transistor Synchronous Motor", Journal of the Institute of Electrical Engineers of Japan, report No. 39-86, (Nov. 1964).

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