| 摘要 |
Driving system and method for an electronically commutated multi-speed motor having a coiled stator and a rotor with at least one permanent magnet and having an electronic circuit that feeds voltage to the coils (1, 2, 3) of the stator according to a relative rotor position as sensed by a sensor mounted to the motor shaft, or by interpreting the voltages induced to the stator coils by the moving rotor. A voltage is supplied to an inverter circuit (10) whose output is applied to motor stator coils (1, 2, 3). The voltage applied to the inverter circuit is varied, making use of a speed switching circuit that can include a voltage multiplier or a voltage divider circuit and the variation of the inverter output voltage varies the motor speed.
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