| 摘要 |
<P>PROBLEM TO BE SOLVED: To learn a detection error on an angle detection means regarding the angle detecting means detecting the angle of rotation of a rotating machine. <P>SOLUTION: In a learning processing section 60, command currents Idc and Iqc are set so that a current flowing through a U phase reaches zero, and the Idc and Iqc are converted into command voltages Vdc and Vqc on a dq axis from a voltage equation and output to a three-phase conversion section 52 through selectors S1 and S2. In the three-phase conversion section 52, the command voltages Vdc and Vqc are converted into the command voltages vuc, vvc and vwc having three-phases. The angle of rotation θn for a learning used in the three-phase conversion section 52 is operated so that an actual current iu having the U phase at a time when an inverter 20a is operated reaches zero on the basis of these command voltages vuc, vvc and vwc, and a difference between the angle of rotation θn for the learning at the time when the actual current iu reaches zero and the angle of rotation θ detected by a resolver 36 is learnt as an angle error. <P>COPYRIGHT: (C)2009,JPO&INPIT |
