Investigation of new rotor cooling structure optimization in MW high-speed permanent magnet motor

被引：0
|
作者：
Cai W. [1 ]
Niu J. [1 ]
Tang Y. [1 ]
机构：
[1] School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2024年 / 28卷 / 05期
关键词：
cooling structure optimization; fluid field; motor losses; MW high-speed permanent magnet motor; rotor ventilation cooling; temperature field;
D O I：
10.15938/j.emc.2024.05.005
中图分类号：
学科分类号：
摘要：
When there is no forced cooling measures on the rotor side of the MW high-speed permanent magnet motor, the rotor side temperature rises and the risk of permanent magnet demagnetization is high. Based on this problem, a new axial ventilation structure was proposed with reinforced ribs, which can improve the wall heat transfer coefficient on the rotor wall, enhance the heat transfer capacity of the rotor side, and reduce the temperature of the motor. A three-dimensional global fluid-solid coupling solution model was established for a 1 MW, 18 000 r/min high-speed permanent magnet motor, and the fluid field and temperature field of the motor were analyzed based on computational fluid dynamics and finite element method. The distribution of fluid and temperature of the motor under rated working conditions was revealed. The heat dissipation performance and temperature rise change of the new cooling structure was compared with that of the traditional cooling structure, and feasibility of the proposed new cooling structure in improving the heat dissipation performance of the motor was verified. Finally, the effect of inlet wind speed on the maximum temperature of the motor was analyzed, and the suitable inlet wind speed range for this cooling structure was obtained, providing theoretical support for the selection of external wind pressure equipment. © 2024 Editorial Department of Electric Machines and Control. All rights reserved.
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页码：38 / 47
页数：9
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