| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reliable inverter controller which prevents stop, due to step-out in momentary power failure or rapid voltage change, by changing the angle of energization instantaneously, according to the voltage of a DC voltage part. <P>SOLUTION: It is equipped with a DC voltage detecting part 209 which detects the voltage value of DC power voltage supplied to an inverter circuit part 205 and an angle-of-energization control unit 218 which changes the angle of energization in the inverter circuit part 205, in the range of less than 180°, according to the voltage value detected with the DC voltage detecting part 209, so that position detecting zone can be increased by reducing the angle of energization, when the number of revolutions changes largely due to rapid voltage change, and the magnetic pole position of a rotor can be surely confirmed, and the step out due to the voltage change can be prevented. <P>COPYRIGHT: (C)2009,JPO&INPIT |
