Disc drive apparatus and motor driver circuit

Details Disc drive apparatus and motor driver circuit Disc drive apparatus and motor driver circuit

2007-06-05

2007-06-05

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S132000, C369S053300

Reexamination Certificate

active

11149653

ABSTRACT:
A motor driver circuit according to the present invention comprises an edge signal generation means for generating an edge signal indicating the timing of phase-switching according to the values of a plurality voltages induced when driving the motor and a drive voltage control means for controlling the highest value of the drive voltage for driving the motor according to the edge signal. The drive voltage control means includes a first drive voltage control means for controlling the highest value of the drive voltage before the timing of phase-switching and a second drive voltage control means for controlling the highest value of the drive voltage after the timing of phase-switching. With this arrangement, it is possible to realize soft switching control while the motor is driven to rotate at high speed and reduce the noise due to the motor being driven to rotate.

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Patent Abstracts of Japan, Publication No. 2002-369575, Publication Date Dec. 20, 2002.
Patent Abstracts of Japan, Publication No. 2003-009580, Publication Date Jan. 10, 2003.

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