| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a controller of a permanent magnet synchronous motor in which smooth start can be realized in a short time without using an absolute position detector. <P>SOLUTION: The controller of a permanent magnet synchronous motor comprises a detection mode setting means 18 outputting a magnetic pole detection command for detecting the magnetic pole position of a permanent magnet synchronous motor, a magnetic pole detection current command means 19 outputting a plurality of different values as electric phase angle and current commands for detecting initial magnetic pole phase in response to the magnetic pole detection command, signal switch sections 21a-21c outputting the electric phase angle and current commands for detecting initial magnetic pole phase being delivered from the magnetic pole detection current command means 19 to a current control section when the magnetic pole detection command is inputted, and a magnetic pole phase judging means 20 for detecting oscillation phenomenon by extracting a high frequency component from a feedback current for a plurality of different values outputted from the magnetic pole detection current command means 19 in response to the magnetic pole detection command, and specifying an electric phase angle for maximizing oscillation as the initial magnetic pole phase. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
