The invention discloses an IGBT over-temperature protection method and apparatus for a motor controller and a motor controller are provided. The method comprises steps of detecting a current output current signal of the motor controller and a current whole-vehicle input signal input to the motor controller, calculating current time IGBT temperature rise according to the current output current signal and a pre-set IGBT temperature rising model and calculating corresponding temperature according to the temperature rise, calculating an output current signal of the motor controller of next time according to the current output current signal and the current whole-vehicle signal, calculating temperature rise of the IGBT of the next time according to the signal and the above model, calculating the temperature of the IGBT of the next time according to the next time temperature rise and the current temperature, and outputting an over-temperature protection signal to enable an IGBT over-temperature circuit to work when the next time temperature is larger than the preset temperature. IGBT over-temperature damage risk can be reduced and reliability can be improved, by the use of the IGBT over-temperature protection method and apparatus.
Motor controller, IGBT over-temperature protection method and apparatus for same
2016-02-17
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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