| 摘要 |
PURPOSE:To improve the cooling efficiency of a motor by forming a liquid leakage preventing film on the inner periphery of a hole opened by punching the peripheral edge of a stator laminated core to form a liquid passage. CONSTITUTION:A stator 10 has a core 12 in which many stator cores are laminated, and an exciting winding 14 inserted into the core 12. A passage of coolant which passes from a coolant fluid inlet 28 formed at part of a front housing 16 through a liquid passage 30 extended axially from the peripheral edge of the stator 10 and exhausts from a coolant fluid outlet 32 formed at part of a rear housing 18 is formed. A leakage preventing film 34 is formed on the inner periphery of the passage 30 of the core 12 to eliminate the leakage of coolant liquid through the fine gap of the laminated layers between the cores. Since the stator in which the heat generating portion of a motor is formed is cooled directed with the coolant liquid, the cooling efficiency can be improved. |
