| 摘要 |
PURPOSE:To provide a brushless motor which can suppress a switching pulse without using an external component such as a capacitor, etc. CONSTITUTION:An output signal of a position signal amplifier 2 stabilized by an AGC circuit is used, and a current of 1/2 of a constant current source to be supplied to a changeover circuit 6 is supplied to the circuit 6 by a cancelling circuit 5, so that an output circuit is not simultaneously conducted at the time of switching phases. An output current is monitored by a resistor, its voltage signal is divided by a resistor, and a negative feedback is applied only at the time of switching the phases. Accordingly, a time change of the output current is alleviated to effectively suppress a switching pulse. |
