| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller ensuring stable operation of a synchronous motor through V/F control. <P>SOLUTION: The controller performing variable speed control of a permanent magnet synchronous motor 3 comprises an FV converter 1 outputting a voltage command from a speed command, an integrator 4 for generating a positional command by integrating the speed command, a current coordinate converter 5 performing coordinate conversion of stator current for two phases into a current component having a phase lead of 90° ahead of a positional command value, a first voltage corrector 6 generating a voltage correction value proportional to the output current from a low-pass filter 8 passing the current from the current coordinate converter, a second voltage corrector 7 generating a voltage correction value proportional to the output current from a high-pass filter 9 passing the output current from the current coordinate converter, and a means for applying voltage correction values outputted from two voltage correctors to a voltage converted by the FV converter. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
