| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device of an induction motor realizing a control system to reduce vibration of a motor by removing direct current components of estimated magnetic flux causing the vibration, and a control method of the same. <P>SOLUTION: A control device 10 of an induction motor includes: a three phase/two phase coordinate converter 108 to convert a current supplied to the induction motor 106 to an α phase current and a β phase current on a stationary coordinate; a dq/two phase converter 120 to convert a magnetic flux voltage command of a d axis component on a rotational coordinate and a torque phase current command of a q axis component to an α phase voltage command and an β phase voltage command on the stationary coordinate; a magnetic flux estimator 11 to compute an α phase magnetic flux estimated value and a β phase magnetic flux estimated value by inputting the α phase current and the β phase current and the α phase voltage command and the β phase voltage command; an off-set removal processing part 12 to remove an off-set from the α phase magnetic flux estimated value and the β phase magnetic flux estimated value; and a speed estimator 112 to estimate the speed of the induction motor 106 by inputting the α phase magnetic flux estimated value and the β phase magnetic flux estimated value from the off-set removal processing part 12. <P>COPYRIGHT: (C)2012,JPO&INPIT |
