Motor driving apparatus and motor using the same

Details Motor driving apparatus and motor using the same Motor driving apparatus and motor using the same

2005-03-29

2005-03-29

Martin, David (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S431000, C318S437000

Reexamination Certificate

active

06873125

ABSTRACT:
A motor driving apparatus includes a pulse-width modulator and a PWM frequency switch for switching a carrier frequency of the modulator. The PWM frequency switch changes a carrier frequency in a start-up period of the motor to another frequency when the motor enters into a regular rotation. The carrier frequency in the start-up period is set at a lower level than that in the regular rotation period, so that the driving apparatus can reduce power-loss generated in the start-up period by switching actions of respective driving elements forming a first and a second drivers. In the regular rotation period, the driving apparatus performs PWM-driving with a high enough carrier frequency, so that the motor driven by this driving apparatus can realize accurate rotation.

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