| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an AC motor controller and, in particular, a controller and a constant measurement apparatus measuring inductance as one of electrical constants of an AC motor with high accuracy and using the measurement result for control. <P>SOLUTION: This AC motor controller includes a means for supplying composite current obtained by superimposing alternating current on direct current from an inverter and for continuously or discontinuously changing a DC component of the composite current. <P>COPYRIGHT: (C)2008,JPO&INPIT |
