| 摘要 |
PURPOSE:To associate a DC power source side in a brushless motor by constructing to output only a control signal to a transistor from a control circuit having a transformer, a control rectifier and a control unit. CONSTITUTION:A control circuit A lowers the voltage of a commericial power source 1, then rectifiers it by a control rectifier 8 and supplies it to a control unit 9. The unit 9 receives a detection signal of the position of a rotor from a detector 10. The power rectified from the power source 1 by an exciting rectifier 2 is fed to an exciting coil 3 and an exciting coil 14 by switching transistors 5, 6 to excite the coils, and its switching signal is received from the unit 9 to the rectifier. |
