| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce high harmonic components contained in a motor current, performing high-harmonic current control by detecting an accurate phase of a high-harmonic current coordinate system. <P>SOLUTION: Coordinate conversion from a dq-axis coordinate system to a three-phase AC coordinate system or a two-phase AC coordinate system (an αβ axis coordinate system) is carried out based on the accurate phase of the dq-axis coordinate system when the coordinate conversion is carried out in the dq-axis coordinate system; and coordinate conversion from a dhqh-axis coordinate system to a three-phase AC coordinate system or a two-phase AC coordinate system is carried out based on the accurate phase of the dhqh-axis coordinate system when the coordinate conversion is carried out in the dq-axis coordinate system. <P>COPYRIGHT: (C)2003,JPO |
