초록 ▼

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 se

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.

대표청구항 ▼

[ What is claimed is:] [1.]1. A device for driving a multi-phase d.c. motor having a plurality of windings, said device comprisinga multi-phase inverter comprising:drive signal generating means for generating drive signals for application to the windings of the motor such that said windings are recu

[ What is claimed is:] [1.]1. A device for driving a multi-phase d.c. motor having a plurality of windings, said device comprisinga multi-phase inverter comprising:drive signal generating means for generating drive signals for application to the windings of the motor such that said windings are recurrently driven in a given sequence by the drive signals; andmeans for pulse-width modulation of the drive signals to control the speed of the motor, racterized in that said drive signal generating means applies a first and a second of said drive signals simultaneously to at least one of the windings of the motor, the first and the second drive signals flowing in opposite directions in the at least one winding, and the pulse-width modulation means applies 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 varying a pulse-width of the first pulse-width modulation with respect to a pulse-width of the second pulse-width modulation, for accelerating, actively decelerating or maintaining a speed of the motor and for selecting a direction of rotation of the motor.