| 摘要 |
<P>PROBLEM TO BE SOLVED: To dispense with weak field control and in turn realize improved system efficiency. <P>SOLUTION: A required motor terminal voltage or an IPM input voltage V is calculated (202) for realizing a target operating point, based on the torque command and the number of revolutions of a motor. When the Voltage V is lower than a battery voltage VB (204), a boosting circuit is interposed between a battery and an IPM, with the battery voltage VB is applied across DC terminals of the IPM, after the battery voltage being once boosted to VI, where V < VI. <P>COPYRIGHT: (C)2004,JPO |
