| 摘要 |
A power conversion apparatus includes a torque command adjusting unit (10A) that adjusts a torque command so that a semiconductor temperature obtained by a semiconductor temperature detecting unit/semiconductor temperature estimating unit (11) matches a preset temperature when the semiconductor temperature is equal to or higher than the preset temperature. The torque command adjusting unit (10A) includes: a regulating unit that includes at least a proportional regulator (13) and an integral regulator (14) and that operates to eliminate a deviation between the preset temperature and the semiconductor temperature; and a torque correction amount limiting unit (16) that limits a torque correction amount (Ä comp *) which is an output of the regulating unit so that the torque correction amount (Ä comp *) does not increase an absolute value of a torque command (Ä*). The torque command adjusting unit (10A) corrects the torque command (Ä*), using the torque correction amount (Ä comp *) limited by the torque correction amount limiting unit (16). As a result, it is possible to prevent interference with a control system and to protect a semiconductor device from overheating appropriately and reliably without limiting the torque of a motor more than necessary. |
