| 摘要 |
PURPOSE:To dispense with a control power supply and enable driving control only with a motor power supply by starting a regulator circuit immediately after generation of an output voltage of the motor power supply and then amplifying the power using the reference voltage of the regulator circuit in view of outputting the stabilized voltage. CONSTITUTION:A control means 16 outputs a control signal for causing a brushless motor(BM) 1 to generate torque. A driving means 3 supplies a power to BM1 on the basis of an output signal of the control means 16. A motor power supply 4 outputs a voltage to supply power to the driving means 3. A constant voltage generating means 5 generates a constant voltage based on the voltage outputted by the motor power supply 4 and then supplies a constant voltage to the control means 16. Moreover, the constant voltage generating means 5 starts a regulator circuit 17 immediately after generation of output voltage by the motor power supply 4 and amplifies the power usindg the output voltage of the regulator circuit 17 to output the regulated voltage. |
