关键词: 高速混合励磁电机, 转子通风孔, 冷却系统, 温度场

Abstract: In order to further reduce the temperature rise of high-speed hybrid excitation motors, ventilation holes were created on the rotor core. This paper took a power 300 kW high-speed hybrid excitation motor as the research object, designed two cooling systems with and without rotor ventilation holes, and systematically explored the influence of the number and size of rotor ventilation holes on the motor temperature rise. The results demonstrated that the implementation of rotor ventilation holes in the hybrid excitation motor significantly reduced the temperature rise of permanent magnets. The cooling effect weakened as the ventilation hole diameter increased, while the temperature rise initially decreased and
subsequently increased with the addition of ventilation holes.

Key words: high-speed hybrid excitation motor,rotor ventilation holes,cooling system,temperature fiel