An electric motor is cooled by using a first refrigerant. The first refrigerant is cooled by heat exchange with a second refrigerant having a cooling target that is different from the first refrigerant, and the first refrigerant after being cooled by the heat exchange is supplied to the electric motor. The supply flow rate of the first refrigerant to the electric motor is reduced where a temperature of the first refrigerant is less than a first prescribed temperature as compared to where the temperature of the first refrigerant is greater than or equal to the first prescribed temperature. The supply flow rate of the first refrigerant is continuously reduced as long as a temperature of the second refrigerant is below a second prescribed temperature even after the temperature of the first refrigerant reaches the first prescribed temperature.
Cooling method and cooling device of electric motor
2024-09-24
Patent
Electronic Resource
English
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |