| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synchronous motor control device to suppress an increase of a current when the motor is out of step and to well-detect a stop of stepping out. <P>SOLUTION: The synchronous motor device for controlling in this invention calculates an excitation current from a motor current detected in a current detection means, to use output voltage of an inverter circuit so as to determine a voltage command by using a motor generation constant, an excitation current command, and the excitation current, additionally to make a voltage correction quantity in such a manner that the excitation current command agrees with the excitation current, and this voltage correction quantity is compared with a predetermined prescribed value to promptly detect stepping out of the synchronous motor. <P>COPYRIGHT: (C)2008,JPO&INPIT |
