| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect the pole phase of a motor accurately by storing the relation of the rotor pole position of a permanent magnet motor and the output of a pole position detector when initial starting after installation of an apparatus. <P>SOLUTION: The controller of a permanent magnet motor comprises a converter 11 for converting a commercial power supply 10 into a DC power supply, an inverter 13 for converting the DC power supply into an AC power supply, a permanent magnet motor 15 being driven by the AC power supply, i.e., the output from the inverter, and a pole detector 22 for detecting the pole phase of the motor. When initially setting an amount of mismatch between the pole phase of the motor and the detection signal of the pole detector, reference phase position of the motor is estimated as the reference phase electric angle 0° point of the motor. Offset amount of the reference phase electric angle 0° point and the output signal reference phase variation point of the pole detector is stored and employed in the operation of the pole phase. <P>COPYRIGHT: (C)2004,JPO |
