|Table of Contents|

Comprehensive influences of end cover grid on aerodynamic noise and temperature characteristics of an automobile alternator(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2022年04期
Page:
244-258
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Comprehensive influences of end cover grid on aerodynamic noise and temperature characteristics of an automobile alternator
Author(s):
HUANG Yan;  WANG Shi-yu;  JIANG Xiao-wen;  DONG Da-wei
(School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
Keywords:
automotive engineering;  alternator;  comprehensive analysis;  aerodynamic noise;  temperature characteristic;  end cover grid
PACS:
U463
DOI:
10.19818/j.cnki.1671-1637.2022.04.019
Abstract:
To synchronically improve the aerodynamic noise performance and heat dissipation effect of the current alternator of new energy vehicles and meet the more stringent noise-, vibration-, and harshness- requirements. An alternator was taken as the research object, the comprehensive influence laws of end cover grids on the aerodynamic noise and temperature field distribution were analyzed by the bench experiment and numerical simulation method. The sound pressure level(SPL)distribution of noise was obtained by the five-point method, and the temperature distribution of key components was acquired on the basis of multi-thermocouple measurement points. The flow field, sound field, and temperature field distributions of the alternator were obtained by the computational fluid dynamics simulation software and electromagnetic Maxwell simulation software. The correctness of the numerical calculation model was verified by the experimental results. Upon the analysis of aerodynamic noise characteristics and temperature field characteristics of the original generator, the end covers with different angles of grid side walls were designed to reduce the kinetic energy loss caused by the cooling airflow impact. The reasonable matching of end cover grid angles and fan-blade airflow outlet angles was discussed, and with Newton's law of cooling, the effects of wavy end cover grids on the increase in the area of heat transfer surface and the reduction in aerodynamic noise were studied. Research results show that the end cover grid structure has a great contribution to the aerodynamic noise, and the cooling effect is also significantly affected by the structure. When the side wall of the end cover grid inclines at an angle of 40, a more reasonable match can be achieved with the airflow outlet angle of the fan blade, the energy loss caused by the cooling airflow impact can be effectively reduced. The maximum temperature of the three-phase stator winding reduces by 9.63 K, and the 12th-order aerodynamic noise lessenes by more than 3 dB(A). The wavy end cover grid increases the convective heat transfer area and airflow velocity, while reducing the aerodynamic impact. The heat dissipation of the end cover increases by 7.72 W, and the temperatures of stator core, end cover, and three-phase stator winding decrease by 5.12, 4.94, and 5.29 K, respectively. The 12th-order and 24th-order aerodynamic noises reduce by more than 3 dB(A)with the improvement in eddy currents by grids and the reduction of airflow impact on the grids. 4 tabs, 25 figs, 31 refs.

References:

[1] 倪有源.汽车用爪极发电机的分析与研究[D].合肥:合肥工业大学,2006.
NI You-yuan. Analysis and research of claw-pole alternators for automotive applications[D]. Hefei: Hefei University of Technology, 2006.(in Chinese)
[2] 施 骞.汽车交流发电机噪声的分析与优化[J].上海汽车,2015,297(5):31-34.
SHI Qian. Analysis and optimization of noise of automotive alternator[J]. Shanghai Auto, 2015, 297(5): 31-34.(in Chinese)
[3] 杨 平.车载交流电机噪声振动分析与试验研究[J].汽车实用技术,2020,45(16):140-142.
YANG Ping. Analysis and experimental study on noise vibration of vehicle AC motor[J]. Automobile Applied Technology, 2020, 45(16): 140-142.(in Chinese)
[4] 杜 毅.定子混合叠压再制造永磁同步电机性能分析[D].合肥:合肥工业大学,2019.
DU Yi. Performance analysis of stator hybrid laminated remanufacturing permanent magnet synchronous motor[D]. Hefei: Hefei University of Technology, 2019.(in Chinese)
[5] 朱 巍.电动车用高功率密度永磁同步电机热管理系统的研究[D].哈尔滨:哈尔滨工业大学,2010.
ZHU Wei. Research on the thermal management of high power density permanent magnet synchronous motor in HEV[D]. Harbin: Harbin Institute of Technology, 2010.(in Chinese)
[6] 刘 敏,董大伟,闫 兵,等.车用交流发电机噪声特性及噪声源测试分析[J].重庆理工大学学报(自然科学版),2010,24(6):13-17.
LIU Min, DONG Da-wei, YAN Bing, et al. Test and analysis of noise characteristics and noise source of vehicle alternator[J]. Journal of Chongqing University of Technology(Natural Science), 2010, 24(6): 13-17.(in Chinese)
[7] SUH S J, CHUNG J T, LIM B D, et al. Case history: noise source identification of an automobile alternator by RPM dependent noise and vibration spectrum analysis[J]. Noise Control Engineering Journal, 1991, 37(1): 31-36.
[8] JEON W H, REW H S, KIM C J. Aeroacoustic
characteristics and noise reduction of a centrifugal fan for a vacuum cleaner[J]. KSME International Journal, 2004, 18(2): 185-192.
[9] FFOWCS WILLIAMS J E, HAWKINGS D L. Sound generation by turbulence and surfaces in arbitrary motion[J]. Philosophical Transactions of the Royal Society of London, Series A, Mathematical and Physical Sciences, 1969, 264(1151): 321-342.
[10] 徐俊伟,吴亚锋,陈 耿.气动噪声数值计算方法的比较与应用[J].噪声与振动控制,2012,32(4):6-10.
XU Jun-wei, WU Ya-feng, CHEN Geng. Comparison and application on the aero-acoustics numerical computing methods[J]. Noise and Vibration Control, 2012, 32(4): 6-10.(in Chinese)
[11] GOLDSTEIN M. Unified approach to aerodynamic sound
generation in the presence of solid boundaries[J]. The Journal of the Acoustical Society of America, 1974, 56(2): 497-509.
[12] ZHU Mao-tao, WANG Kun, ZHANG Peng-fei, et al. Numerical and experimental investigation of aerodynamic noise from automotive cooling fan module[J]. Journal of Vibroengineering, 2015, 17(2): 967-977.
[13] ZHANG Zhong-wei. Numerical research on aerodynamic radiation noises of alternators in vehicles[J]. Journal of Vibroengineering, 2017, 19(4): 3084-3098.
[14] 黄泰明,李伟平,纪念洲,等.车用爪极发电机的不同部件对气动噪声的影响[J].重庆大学学报,2021,44(9):1-14
HUANG Tai-ming, LI Wei-ping, JI Nian-zhou, et al. The influence of the different part of the claw alternator to the aerodynamic noise[J]. Journal of Chongqing University, 2021, 44(9): 1-14.(in Chinese)
[15] 柳 琦,闫 兵,张胜杰,等.考虑影响声传播因素的车用交流发电机气动噪声预测[J].声学技术,2017,36(4):363-370.
LIU Qi, YAN Bing, ZHANG Sheng-jie, et al. Aerodynamic noise prediction of vehicle alternator considering the factors affecting acoustic propagation[J]. Technical Acoustics, 2017, 36(4): 363-370.(in Chinese)
[16] 张 凡,黄 燕,柳 琦,等.近场项对车用交流发电机气动噪声影响分析[J].振动与冲击,2020,39(7):232-237,267.
ZHANG Fan, HUANG Yan, LIU Qi, et al. Effects of near field terms on aerodynamic noise of the vehicle alternator[J]. Journal of Vibration and Shock, 2020, 39(7): 232-237, 267.(in Chinese)
[17] 左曙光,李悦姣,吴旭东,等.爪极电机气动噪声数值模拟及机理分析[J].浙江大学学报(工学版),2017,51(3):612-619.
ZUO Shu-guang, LI Yue-jiao, WU Xu-dong, et al. Numerical simulation and mechanism analysis of aerodynamic noise in claw pole alternator[J]. Journal of Zhejiang University(Engineering Science), 2017, 51(3): 612-619.(in Chinese)
[18] ZUO Shu-guang, XIE Chao-feng, WU Xu-dong, et al.
Numerical simulation and optimization of aerodynamic noise for claw pole alternator[J]. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2019, 233(3): 857-879.
[19] 张亚东.车用交流发电机气动噪声特性分析与降噪研究[D].成都:西南交通大学,2014.
ZHANG Ya-dong. Study on characteristics analysis and control of aeroacoustics of automotive alternator[D]. Chengdu: Southwest Jiaotong University, 2014.(in Chinese)
[20] 黄旭珍.短时高过载无槽圆筒型永磁直线电机电磁及温升特性研究[D].哈尔滨:哈尔滨工业大学,2012.
HUANG Xu-zhen. Research on electromagnetic and temperature rise characteristics of short-time and high over-load slot-less tubular permanent magnet linear motor[D]. Harbin: Harbin Institute of Technology, 2012.(in Chinese)
[21] 张 琪,王伟旭,黄苏融,等.高密度车用永磁电机流固耦合传热仿真分析[J].电机与控制应用,2012,39(8):1-5.
ZHANG Qi, WANG Wei-xu, HUANG Su-rong, et al. Heat transfer simulation of high density permanent magnet motor for vehicles based on fluid-solid coupling method[J]. Electric Machines and Control Application, 2012, 39(8): 1-5.(in Chinese)
[22] NING Yin-hang, LIU Chuang. Analysis and calculation of
electromagnetic and temperature field in a hybrid excitation synchronous generator[J]. International Journal of Applied Electromagnetics and Mechanics, 2016, 50(3): 435-448.
[23] HUANG Zi-yuan, FANG Jian-cheng, LIU Xi-quan, et al.
Loss calculation and thermal analysis of rotors supported by active magnetic bearings for high-speed permanent magnet electrical machines[J]. IEEE Transactions on Industrial Electronics, 2016, 63(4): 2027-2035.
[24] 吴胜男,李文杰,安忠良,等.变速恒压混合励磁风力发电机的热分析[J].电工技术学报,2019,34(9):1857-1864.
WU Sheng-nan, LI Wen-jie, AN Zhong-liang, et al. Thermal analysis of variable-speed constant-voltage hybrid excited wind genertors[J]. Transactions of China Electrotechnical Society, 2019, 34(9): 1857-1864.(in Chinese)
[25] 丁树业,申淑锋,杨 智,等.高速永磁同步电机流固耦合仿真与性能分析[J].电机与控制学报,2021,25(10):112-121.
DING Shu-ye, SHEN Shu-feng, YANG Zhi, et al. Fluid-solid coupling simulation and performance analysis of high-speed permanent magnet synchronous motor[J]. Electric Machines and Control, 2021, 25(10): 112-121.(in Chinese)
[26] 黄 燕,李 露,蒋孝文,等.基于Kriging和NSGA-Ⅲ算法的汽车交流发电机温度场预测[J].电机与控制学报,2022,26(1):86-95.
HUANG Yan, LI Lu, JIANG Xiao-wen, et al. Prediction of temperature field for automotive generator based on Kriging and NSGA-Ⅲ algorithms[J]. Electric Machines and Control, 2022, 26(1): 86-95.(in Chinese)
[27] CHONG Y C, SUBIABRE E J P E, MUELLER M A, et al.
The ventilation effect on stator convective heat transfer of an axial-flux permanent-magnet machine[J]. IEEE Transactions on Industrial Electronics, 2014, 61(8): 4392-4403.
[28] FAN Xing-gang, QU Rong-hai, LI Jian, et al. Ventilation and thermal improvement of radial forced air-cooled FSCW permanent magnet synchronous wind generators[J]. IEEE Transactions on Industry Applications, 2017, 53(4): 3447-3456.
[29] 朱杭灵,汪元凤,朱振华,等.整车噪声实验室消声室及试验台设计[J].轮胎工业,2016,36(1):42-46.
ZHU Hang-ling, WANG Yuan-feng, ZHU Zhen-hua, et al. Design of anechoic chamber and test bench for vehicle noise laboratory[J]. Tire Industry, 2016, 36(1): 42-46.(in Chinese)
[30] 汪 伟,杨通强,王 红,等.非稳态信号计算阶次分析中的重采样率研究[J].振动、测试与诊断,2009,29(3):349-351.
WANG Wei, YANG Tong-qiang, WANG Hong, et al. Study on resampling rate in order analysis of unsteady signals calculation[J]. Journal of Vibration, Measurement and Diagnosis, 2009, 29(3): 349-351.(in Chinese)
[31] 王天利,张相坤,杨 亮.用阶次分析法识别起动机的异常噪声[J].噪声与振动控制,2014,34(1):169-172.
WANG Tian-li, ZHANG Xiang-kun, YANG Liang.Application of order analysis method to diagnosis of abnormal noise of starters[J]. Noise and Vibration Control, 2014, 34(1): 169-172.(in Chinese)

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Last Update: 2022-09-01