Brushless motor drive circuit

Details Brushless motor drive circuit Brushless motor drive circuit

1986-09-12

1988-07-26

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

H02P 602

Patent

active

047603151

ABSTRACT:
A brushless motor drive circuit includes a plurality of Hall elements for detecting magnetic flux changes of a rotating rotor magnet. A drive signal generating circuit generates drive signals applied to the stator windings of the motor. Each of the drive signals has a pair of slanted edge portions and a relatively flat portion interposed between the slanted edge portions which are directly formed from said detected flux changes. The circuit is effective in preventing acoustic noises during phase switching.

REFERENCES:
patent: 4230976 (1980-10-01), Muller
patent: 4356437 (1982-10-01), Saito et al.
patent: 4442386 (1984-04-01), Uchida et al.

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