全封闭高速永磁电机转子结构对转子散热的影响

发布时间：2019-04-21 08:31

【摘要】：为研究转子物理结构对机壳水冷全封闭式高速永磁电机转子散热的影响,以一台15k W、30 000r/min的非晶合金高速永磁电机为例,基于流体力学和传热学理论,建立三维流固耦合共轭传热求解域模型,并给出基本假设与边界条件,采用有限体积法进行流固耦合求解,得到转子有无轴向通风孔和通风孔与风刺相配合时电机内流体流动特性及各部件的温度分布。在此基础上,研究通风孔尺寸、通风孔数量变化对流体场及温度场的影响。计算结果表明,转子引入风刺和通风孔等风压元件可有效提高转子的散热能力,降低永磁体温升。通过增大通风孔尺寸和数量可进一步降低永磁体温升。最后,对一台15k W全封闭式水冷非晶合金永磁电机进行了温升试验,并将试验数据与计算结果进行对比,验证了耦合场计算结果的正确性。
[Abstract]:In order to study the effect of rotor physical structure on the rotor heat dissipation of a fully enclosed water cooled permanent magnet motor, a 15kW, 30 000r/min amorphous alloy high speed permanent magnet motor was taken as an example. Based on the theory of fluid mechanics and heat transfer, a high speed permanent magnet motor with amorphous alloy was used as an example. The solution domain model of fluid-solid coupling conjugate heat transfer is established and the basic assumptions and boundary conditions are given. The finite volume method is used to solve the fluid-solid coupling. The fluid flow characteristics in the motor and the temperature distribution of the components are obtained when the rotor has axial ventilation holes and air vents in combination with the air spins. On this basis, the influence of ventilation hole size and the number of ventilation holes on fluid field and temperature field is studied. The results show that the cooling capacity of the rotor can be improved and the temperature rise of permanent magnet can be reduced by introducing wind pressure elements such as wind spins and vent holes into the rotor. The temperature rise of permanent magnet can be further reduced by increasing the size and number of vent holes. Finally, the temperature rise test of a 15kW fully enclosed water-cooled amorphous alloy permanent magnet motor is carried out, and the experimental data are compared with the calculated results to verify the correctness of the calculation results of the coupling field.
【作者单位】：沈阳工业大学国家稀土永磁电机工程技术研究中心;
【基金】：国家自然科学基金项目(51307111,51677122) 国家重点研发计划(2016YFB0300503) 辽宁省教育厅科学研究项目(LGD20160006)资助
【分类号】：TM351

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