| 摘要 |
PURPOSE:To obtain a vector controller for induction motor, which has an excellent control performance, by compensating a slip frequency in such a manner that the deviated portion between a primary voltage and a primary voltage command of an induction motor obtained by the three-phase/two-phase conversion of a three-phase voltage command becomes zero. CONSTITUTION:A primary voltage v1d (v1q) is detected by converting three-phase voltage commands eu, ev and ew of an induction motor 1 by means of three-phase/two-phase rotational coordinate converter 17, a primary voltage command v1d* (v1q*) is obtained by calculations based on a primary voltage command i1q and an exciting command (lambda2d*/M*) by a voltage command arithmetic portion 16, and secondary resistance compensation is performed by controlling in such a manner that the fluctuated portion DELTAomegas of a slip angular frequency becomes zero based on the deviated portion DELTAv1d (DELTAv1q) between these primary voltage command and the primary voltage. |
