| 摘要 |
<P>PROBLEM TO BE SOLVED: To exhibit a revolution ripple suppression effect in operation at low-revolution drive where torque pulsation becomes large, being able to hold a relatively large energizing angle even at low-speed drive when torque pulsation is easy to appear by regulating the voltage, according to a load state. <P>SOLUTION: There are provided a brushless DC motor which comprises a rotor having a permanent magnet and a stator having three-phase winding, an inverter 3 which supplies the above three-phase winding with power, a load detecting circuit 5 which detects the load state of the motor from the operation state information of the motor, a drive wave generator 7 which outputs waves to be applied to the phase of the above stator, based on the signal outputted from the above load detecting circuit 5, and a voltage regulator 8 which regulates the voltage to be supplied to the above inverter 3, based on the signal outputted from the above load detecting circuit 5. <P>COPYRIGHT: (C)2008,JPO&INPIT |
