| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce vibration and noise when a motor is driven in a sensorless motor driver. <P>SOLUTION: The sensorless motor driver (60) includes: a first operation mode generating a current waveform including a non-conduction period based on a first rotor position signal generated by detecting a zero cross of each winding of the motor as a signal showing a rotor position of the motor (1) and supplying current to each winding of the motor in accordance with the current waveform; and a second operation mode generating a current waveform which does not include the non-conduction period based on a second rotor position signal generated based on a value other than the zero cross of each winding of the motor as a signal showing the rotor position of the motor and supplying the current to each winding of the motor in accordance with the current waveform. The first and second modes can be switched. <P>COPYRIGHT: (C)2012,JPO&INPIT |
