| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that it is difficult to apply a function, for operating a motor by switching the number of turns of a stator winding at any time, to an on-vehicle apparatus.SOLUTION: A first stator winding 14 is connected with a first battery 20 via a first inverter INV1. A second stator winding 16, having a rated voltage higher than that of the first stator winding 14, is connected with a second battery 22 via a second inverter INV2. The negative electrode side DC bus Ln1 of the first inverter INV1 and the negative electrode side DC bus Ln2 of the second inverter INV2 are short-circuited, and the positive electrode side DC bus Lp1 is connected with the positive electrode side DC bus Lp2 via a first switch means 30. The positive electrode side DC bus Lp1 is connected with the positive terminal of the first battery 20 via a second switch means 32. In a high rotation region, the first switch means 30 is closed and the second switch means 32 is opened. |
