| 摘要 |
The phases (W1, W2, W3) of the direct-current brushless electric motor are energized sequentially in a manner such that there is a period of time during which both of the two phases being switched are energized. Moreover, the motor is configured in a manner such that the electromotive forces (E1, E2, E3) induced in the phases (W1, W2, W3) are superposed, that is, there are periods during which the electromotive forces in two adjacent phases are both at their maximum value. By virtue of these characteristics, the motor according to the invention has very little variation of the torque (TQ) and of the current (IL) and consequently generates very little acoustic or electrical noise. <IMAGE> |
