| 摘要 |
A device for driving a multi-phase d.c. motor (8) includes a multi-phase inverter (11) for supplying drive signals to the windings (2, 4, 6) of the motor. The multi-phase inverter (11) supplies a first and a second drive signal at a time to at least one winding (2) of the motor. The first and the second drive signal flow in opposite directions in the at least one winding (2). The device further has pulse-width modulators means (40.1-40.6) for applying a first pulse-width modulation to the first drive signal and a second pulse-width modulation to the second drive signal. The pulse-width modulation means (40.1-40.6) are adapted to vary the pulse-width of the pulse-width modulation in order to accelerate, actively decelerate or maintain the speed of the motor 8 and to select a direction of rotation of the motor.
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