%0 Journal Article
%T 基于试验的车用爪极发电机噪声源识别与分析<br>Noise Sources Identification and Analysis for Automotive Claw Pole Alternator Based on Experiment
%A 吴双龙
%A 左曙光
%A 邓文哲
%A 钟鸿敏
%A 孙罕
%J 振动.测试与诊断
%D 2018
%R 10.16450/j.cnki.issn.1004-6801.2018.02.012
%X 针对某型车用爪极发电机的噪声问题，基于试验对其噪声源进行了识别与分析。首先，测试了该型号4台不同结构（是否带风扇）的爪极发电机在空载和负载时的振动噪声；然后，利用阶次分析的方法识别了机械噪声、气动噪声和电磁噪声，并通过流场仿真和电磁场理论解释了气动噪声和电磁噪声产生的机理；最后，对各噪声源的贡献量进行了分析。结果表明：爪极发电机电磁力会产生6k(k=1, 2,…）阶电磁噪声；冷却风扇、转子和开槽定子均会产生气动噪声；电机运行时中低转速以36阶电磁噪声为主，高转速阶段以8, 10, 12阶气动噪声为主；机械噪声由于其幅值较小，对总体噪声影响不大。本研究对发电机的设计和优化具有一定的指导意义。<br>For the noise problem of an automotive claw pole alternator, acoustic testing is conducted to investigate its noise sources. Firstly, the vibration and noise of four different prototypes are measured under no-load and load conditions. Then, the mechanical noise, aerodynamic noise and electromagnetic noise are identified based on order analysis. The generation mechanism of aerodynamic noise and electromagnetic noise is revealed through the flow field simulation and electromagnetic field theory. Finally, the contribution of each noise source is analyzed. The results show that electromagnetic force would cause 6k(k=1,2,3…) order electromagnetic noise. Cooling fans, rotor and slotted stator would generate aerodynamic noise, among them front fan produces the integer order (11st, 12nd, 13rd,…) noise, rear fan produces the even order (8th, 10th, 12nd,…) noise, rotor produces 6k (k=1,2,3,…) order and stator produces 36th order. At low and middle speed, noise is mainly from 36th order electromagnetic noise while at high speed, the aerodynamic noise (8th, 10th and 12nd order) is dominant. As the mechanical noise is low, it has little effect on the overall noise.
%K 爪极发电机
%K 噪声测试
%K 阶次分析
%K 电磁噪声
%K 气动噪声&lt
%K br&gt
%K claw pole alternators
%K noise test
%K order analysis
%K electromagnetic noise
%K aerodynamic noise
%U http://zdcs.nuaa.edu.cn/ch/reader/view_abstract.aspx?file_no=201802012&flag=1