外转子永磁直驱电动机水冷系统传热特性  

Heat Transfer Characteristics of Water-cooled System of Outer Rotor Permanent Magnet Direct Drive Motor

作　　者：李文凯 王德喜 陈功 LI Wenkai;WANG Dexi;CHEN Gong(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;School of Chemical Equipment,Shenyang University of Technology,Liaoyang 111000,China)

机构地区：[1]沈阳工业大学机械工程学院,沈阳110870 [2]沈阳工业大学化工装备学院,辽宁辽阳111000

出　　处：《机械工程师》2024年第8期29-33,共5页Mechanical Engineer

摘　　要：随着对电动机高效节能要求的提高,外转子永磁直驱电动机凭借其起动转矩大、高效节能的优点得到了广泛的应用,但散热困难是外转子永磁直驱电动机普遍存在的问题。为解决外转子永磁直驱电动机散热困难的问题,以45 kW的外转子永磁直驱电动机为研究对象,在定子支架中设计安装水冷系统。基于周向Z型水冷结构,建立了水冷电动机的三维模型,通过CFD流体流动与传热相耦合的分析方法,分析不同冷却水流速对电动机温升的影响规律。结果表明,随着冷却水流速的增加,水冷系统散热效果得到提升,但增大到一定的流速后,进一步增大冷却水流速对水冷系统散热效果的改善很小。以上结论可以为外转子永磁直驱电动机水冷系统设计提供一定的理论依据。With the improvement of the requirements for high efficiency and energy saving of the motor,the outer rotor permanent magnet direct drive motor has been widely used due to its advantages of large starting torque and high efficiency and energy saving,but the difficulty of heat dissipation is a common problem in the outer rotor permanent magnet direct drive motor.In order to solve the problem of heat dissipation of external rotor permanent magnet direct drive motor,a 45 kW external rotor permanent magnet direct drive motor is taken as the research object,and a water-cooled system is designed and installed in the stator bracket.Based on the circumferential Z-type water-cooled structure,a three-dimensional model of the water-cooled motor is established.The influence of different cooling water flow rates on the temperature rise of the motor is analyzed using CFD fluid flow and heat transfer coupling analysis method.The results show that with the increase of cooling water flow rate,the heat dissipation effect of water-cooled system is improved,but after increasing to a certain flow rate,further increasing the cooling water flow rate has little effect on the heat dissipation effect of water-cooled system.The above conclusions can provide a theoretical basis for the design of water-cooled system of external rotor permanent magnet direct drive motor.

关 键 词：永磁直驱电动机 水冷电动机 电动机温升 数值模拟 

分 类 号：TM351[电气工程—电机]