Abstract：To analyze each part temperature of the motor during operation,selecting the appropriate way of cooling the motor,and ensuring that all components work within the normal temperature range,it has been calculated the equivalent thermal conductivity,the air gap equivalent thermal conductivity,surface cooling conductivity and loss under different speed. The results show that the lower the speed of PMFSLM,the higher the temperature of the motor,and the highest temperature exists at armature winding,temperature is gradually reducing from the axis of the center position to both ends,then the motor can be air-cooled or water-cooled to reduce temperature rise when it is used for long time.

Keyword：permanent magnet flux-switching linear motor;temperature field;cooling mode;finite element analysis;