In order to improve the power density

safety and heat dissipation performance of high-speed permanent magnet synchronous motor for fuel cell air compressor

a composite cooling system was designed

and an electromagnetic-thermal bidirectional coupling platform was established based on finite element method and CFD software. On this basis

the cooling system of high-speed permanent magnet motor was optimized to ensure that it worked at a suitable temperature and improve the motor performance. The final current amplitude of the optimized high-speed permanent magnet motor is 25 A

which is increased by 66.7%. The maximum power of the motor is 17 kW

which is increased by 70%. The maximum torque is 1.48 Nm

which is increased by 66.3%. The maximum winding temperature is about 381.8 K

which is reduced by 52.4%. The maximum temperature of permanent magnet is about 404.9 K

which is reduced by 32.3%.