| 摘要 |
<P>PROBLEM TO BE SOLVED: To derive magnetic pole positions of two rotation type inductive loads in short time. <P>SOLUTION: This load controller includes: two power conversion parts which convert DC voltage into AC voltage to be applied to the two rotation type inductive loads with the same specification; a current detection part which detects DC current to be supplied to the power conversion parts; and a control part which controls the power conversion parts. The control part performs control so as to simultaneously input the same voltage vector to the two loads for one period at electric angles for every predetermined angle, calculates the total δ axis current in the two loads based on the DC current detected by the current detection part and the angle of the voltage vector at the time, and to input the voltage vector at an angle of one point to one load, calculates δ axis current in the load according to the DC current detected by the current detection part and the voltage vector at the angle of one point at this time, calculates each current response of the two loads based on a parameter regarding the total δ axis current, the angle of one point, and the δ axis current according to the angle of one point, and derives the magnetic pole positions of each load from a phase component of the current response. <P>COPYRIGHT: (C)2012,JPO&INPIT |
