| 摘要 |
An overheating protection control apparatus for an inverter driving a rotating electric machine comprising: a temperature sensor for measuring the temperature of a power control element in the inverter, and a control device restricting the load factor of the rotating electric machine when the temperature measured by the temperature sensor reaches a threshold value. The control device modifies the threshold value based on a parameter affecting heat radiation or cooling of the inverter. Preferably, the inverter includes a plurality of power control elements. The temperature sensor detects the temperature of one or more, but not all of the plurality of power control elements. The parameter is a physical quantity affecting the temperature difference between the one or more power control elements and another power control element included in the inverter. Preferably, the inverter is cooled by a coolant medium. The parameter is the temperature of the coolant medium. |
