| 摘要 |
PURPOSE:To provide a brushless motor of a small size, which integrates a driving circuit into itself and has a speed controlling function and other excellent functions. CONSTITUTION:Into a brushless motor, a driving circuit is integrated which is provided with a switching power element part 2, a means 8 for generating a commutating signal, a means 7 for generating driving signals, a speed error signal generating means 9 wherein by comparing the rotational speed signal obtained from the rotation of the motor with the speed command signal inputted from the outside, the speed error signal thereof is outputted, and a PWM controlling means 10 for controlling the switching duty of the switching power element part 2 according to the speed error signal. Thereby, the brushless motor, which can be driven directly by a high DC voltage and has a speed controlling function, can be obtained. |
