Driving circuit for brushless motor

Details Driving circuit for brushless motor Driving circuit for brushless motor

2006-05-16

2006-05-16

Martin, David (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S432000, C318S434000, C318S722000, C318S700000

Reexamination Certificate

active

07045982

ABSTRACT:
A driving circuit for a brushless motor includes a current sensor for detecting alternating phase-current flowing in one of the phase coils, a switching driver for supplying each phase-coil with prescribed alternating phase-current, a reference value setting circuit which provides a reference value which changes in synchronism with the prescribed phase-current to be larger than the same and an abnormality determining circuit which determines abnormality if the current detected by the current sensor is larger than the reference value.

REFERENCES:
patent: 5592058 (1997-01-01), Archer et al.
patent: 6107926 (2000-08-01), Kifuku et al.
patent: 6170241 (2001-01-01), Shibilski et al.
patent: 6170509 (2001-01-01), Karta
patent: 6177774 (2001-01-01), Iwashita et al.
patent: 6359405 (2002-03-01), Tsurumi

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