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全封闭式电机的损耗热,从产生的部位(如转子绕组)传向散热外壳表面,热路上存在着较大的径向温度梯度。其“内部热导率”是很低的。而铁心槽处热量的导出尤为不利。为了使电机温升不超过绝缘耐热等级的温度极限,人们非常重视电机散热能力。考虑到电机的成本及效率,不一定能采用较高级的绝缘材料来提高绕组温度。近来,人们试用蒸发及冷凝的方法,即所谓热管的方法来冷却电机。通过适当选择管壁材料及工作液,热管温度范围能满足实
Fully enclosed motor loss of heat, from the production of parts (such as the rotor winding) to the heat dissipation shell surface, there is a large radial temperature gradient on the hot road. Its “internal thermal conductivity” is very low. The core groove at the heat export is particularly unfavorable. In order to make the motor temperature does not exceed the thermal limit of the insulation temperature limit, people attach great importance to motor cooling capacity. Taking into account the cost and efficiency of the motor, may not be able to use more advanced insulation materials to improve the winding temperature. Recently, people tried evaporation and condensation methods, the so-called heat pipe method to cool the motor. By proper choice of wall materials and working fluid, heat pipe temperature range to meet the real