论文基于自通风型牵引电机的气动噪声特征与声学试验分析，确定了主要噪声源，基于CFD理论计算电机整机稳态流场，获取系统风阻、速度分布等参数，根据流动特性预测评估电机气动噪声。通过进出风结构与动力风扇的优化设计，采用低流阻过滤器、高效能风扇从声源上降噪。并采用隔声罩从噪声传播路径上控制噪声。通过优化实现降噪目的。结合流场与声场特性，采用解析法预测了高转速下优化后电机的气动噪声，预测值与试验值偏差在工程可接受范围内，预测方法对噪声的快速评估具有一定的参考价值。同时经试验验证在高转速范围内，降噪措施有效，降噪效果明显，论文成果已申请发明专利，具有较高的工程应用价值。

图1 动力风扇优化设计

图2 风路优化设计

图3 试验验证

Based on the analysis of aerodynamic noise characteristics and acoustic tests of self-ventilated traction motors, the main noise sources were determined, the steady-state flow field of the motor was calculated based on CFD theory, the parameters such as wind resistance and velocity distribution of the system were obtained, and the aerodynamic noise of the motor was predicted and evaluated according to the flow characteristics. Through the optimized design of the inlet and outlet air structure and power fan, the low flow resistance filter and high-efficiency fan are used to reduce noise from the sound source. Acoustic enclosures are used to control noise from the noise propagation path. Optimization for noise reduction. Combined with the characteristics of flow field and acoustic field, the analytical method is used to predict the aerodynamic noise of the optimized motor at high speed, and the deviation between the predicted value and the experimental value is within the acceptable range of the project, and the prediction method has a certain reference value for the rapid evaluation of noise. At the same time, it has been verified by the test that in the high speed range, the noise reduction measures are effective, the noise reduction effect is obvious, and the paper results have been applied for invention patents, which has high engineering application value.

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论文链接：

http://www.motor-abc.cn/djykzyy/article/abstract/20241001

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Huang Pengcheng, a Senior Engineer, works at CRRC Zhuzhou Electric Co., Ltd. He is currently pursuing a Ph.D. in the Department of Electrical Engineering at Zhejiang University, with a research focus on high-performance electric motor design. E-mail: huang-pc@qq.com

马吉恩，浙江大学工学博士，教授、博导。主持承担国家基金面上项目2项；发表SCI论文50余篇；以主要完成人获国家科技进步二等奖1项、中国专利金奖1项、省部级科技特等/一等奖6项。邮箱：majien@zju.edu.cn

Ma Jien, Ph.D. in Engineering, Zhejiang University, Professor and Doctoral Supervisor. presided over and undertook 2 general projects of the National Fund; published more than 50 SCI papers; As the main completer, he has won 1 second prize of the National Science and Technology Progress Award, 1 China Patent Gold Award, and 6 provincial and ministerial science and technology special prizes/first prizes. E-mail: majien@zju.edu.cn