基于相似原理的脉宽调制电压激励下电机永磁体涡流损耗频域压缩计算方法

doi:10.19595/j.cnki.1000-6753.tces.161770

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (40972 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract A similarity method with frequency domain compression is proposed for calculating the eddy current loss in permanent magnets (PM) of machines fed by pulse width modulation (PWM) voltage. The method transforms the high frequency (HF) eddy current problem to a lower frequency one, which reduces the time steps and computation time for the finite element analysis (FEA). Beyond previous similarity methods, the magnetic saturation of iron core is considered, and the fundamental voltage, frequency, and rotation speed are kept unchanged. Taken equal penetration depth for HF in eddy current regions as the precondition, the similarities in machine current, magnetic field and eddy current loss are analyzed by analytical method. The proposed method is verified by time stepping FEA of a surface-mounted PM machine with magnetic saturation in its stator teeth. The results suggest that the discrepancy is within 6.6% for the HF components in stator current, and the discrepancy in eddy current loss is -4.75% when the similarity ratio equals 4, while the computation time is 1/5 of the traditional FEA. By measuring the impedance variation in coils after placing metal blocks inside and the temperature of PM in a PM machine, the similarity correlations and the eddy current loss calculation are verified.

Key words： Permanent magnet (PM) pulse width modulation (PWM) voltage eddy current loss similarity theory finite element analysis (FEA)

Received: 10 November 2016 Published: 05 March 2018

PACS:

TM351

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Zeng Yingyu
	Jiang Xiaohua

Cite this article:

Zeng Yingyu,Jiang Xiaohua. A Similarity Method Based on Spectrum Compression for Calculating Eddy Current Loss in Magnets of PM Machines Fed by PWM Voltage[J]. Transactions of China Electrotechnical Society, 2018, 33(4): 943-954.

URL:

https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.161770 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I4/943

[1] Katsumi Yamazaki, Takashi Fukuoka, Kan Akatsu, et al.Investigation of locked rotor test for estimation of magnet PWM carrier eddy current loss in synchronous machines[J]. IEEE Transactions on Magnetics, 2012, 48(11): 3327-3330.
[2] 陈萍, 唐任远, 佟文明, 等. 高功率密度永磁同步电机永磁体涡流损耗分布规律及其影响[J]. 电工技术学报, 2015, 30(6): 1-9.
Chen Ping, Tang Renyuan, Tong Wenming, et al.Permanent magnet eddy current loss and its influence of high power density permanent magnet synchronous motor[J]. Transactions of China Electrotechnical Society, 2015, 30(6): 1-9.
[3] Van der Geest M, Polinder H, Ferreira J A. Computationally efficient 3D FEM rotor eddy-current loss calculation for permanent magnet synchronous machines[C]//IEEE International Electric Machines & Drives Conference (IEMDC), Coeur d'Alene, ID, USA, 2015: 1165-1169.
[4] Mehran Mirzaei, Andreas Binder, Bogdan Funieru, et al.Analytical calculations of induced eddy currents losses in the magnets of surface mounted PM machines with consideration of circumferential and axial segmentation effects[J]. IEEE Transactions on Magnetics, 2012, 48(12): 4831-4841.
[5] Yukihiro Yoshida, Kenji Nakamura, Osamu Ichinokura.Calculation of eddy current loss in permanent magnet motor caused by carrier harmonics based on reluctance network analysis[C]//The 15th European Conference on Power Electronics and Applications (EPE), Lille, 2013: 1-6.
[6] 唐任远, 陈萍, 佟文明, 等. 考虑涡流反作用的永磁体涡流损耗解析计算[J]. 电工技术学报, 2015, 30(24): 1-10.
Tang Renyuan, Chen Ping, Tong Wenming, et al.Analytical calculation of eddy current loss accounting for eddy current reaction[J]. Transactions of China Electrotechnical Society, 2015, 30(24): 1-10.
[7] Balamurali A, Lai Chunyan, Mollaeian A, et al. Analytical investigation into magnet eddy current losses in interior permanent magnet motor using modified winding function theory accounting for pulse width modulation harmonics[J]. IEEE Transa- ctions on Magnetics, 2016, 52(7): Art. no. 8106805.
[8] Chen Liang, Wang Jiabin, Nair S S.An Analytical method for predicting 3-D eddy current loss in permanent magnet machines based on generalized image theory[J]. IEEE Transactions on Magnetics, 2016, 52(6): 8103311.
[9] Nair S S, Wang Jiabin, Chen Liang, et al.Prediction of 3-D high-frequency eddy current loss in rotor magnets of SPM machines[J]. IEEE Transactions on Magnetics, 2016, 52(9): 8107910.
[10] Yamazaki K, Watari S.Loss analysis of permanent- magnet motor considering carrier harmonics of PWM inverter using combination of 2-D and 3-D finite- element method[J]. IEEE Transactions on Magnetics, 2005, 41(5): 1980-1983.
[11] 基尔皮契夫. 相似理论[M]. 北京: 科学出版社, 1955.
[12] 徐挺. 相似方法及其应用[M]. 北京: 机械工业出版社, 1995.
[13] 牟道槐, 华智明, 成涛. 用相似理论的观点看“标幺值”与“机械惯性时间常数T_J”[J]. 电力系统及其自动化学报, 1998, 10(1): 26-31.
Mu Daohuai, Hua Zhiming, Cheng Tao.Exploring the per unit and the mechanical inertia time constant by similarity theory[J]. Proceedings of the EPSA, 1998, 10(1): 26-31.
[14] 李洪涛, 陶风波, 贾勇勇, 等. 基于相似问题的气体绝缘母线接头过热失效模拟[J]. 电工技术学报, 2016, 31(12): 99-107.
Li Hongtao, Tao Fengbo, Jia Yongyong, et al.Over- heat failure simulation test for gas-insulated switch- gear bus contact based on scale model[J]. Transa- ctions of China Electrotechnical Society, 2016, 31(12): 99-107.
[15] 李伟力, 付敏, 周封, 等. 基于流体相似理论和三维有限元法计算大中型异步电动机的定子三维温度场[J]. 中国电机工程学报, 2000, 20(5): 14-17, 21.
Li Weili, Fu Min, Zhou Feng, et al.Calculation of 3D stator temperature field of large and medium scale asynchronous motor on the basis of theory of fluid similarity and 3D FEM[J]. Proceedings of the CSEE, 2000, 20(5): 14-17, 21.
[16] Moschoudis A P, Tsekouras G J, Kanellos F D.Design of particular electrical machines by using similarity theory and scale factors[C]//International Conference on Electrical Machines (ICEM), Berlin, 2014: 2486-2491.
[17] Pu Ziheng, Ruan Jiangjun, Du Zhiye, et al.Analysis of voltage distribution characteristics in UHVDC converter transformer winding based on the reduced- scale model[J]. IEEE Transactions on Magnetics, 2014, 50(11): 8402005.
[18] 曾颖宇, 蒋晓华. PWM电压激励下电机永磁体涡流有限元计算的比拟等效方法[J]. 电机与控制应用, 2016, 43(12): 58-63.
Zeng Yingyu, Jiang Xiaohua.Analogy method for FEM calculation of eddy current in permanent magnet in PMSM with PWM voltage excitation[J]. Electric Machines & Control Application, 2016, 43(12): 58-63.
[19] 谢德馨, 姚缨英, 白保东, 等. 三维涡流场的有限元分析[M]. 北京: 机械工业出版社, 2001.
[20] Holmes D G, Lipo T A.电力电子变换器PWM技术原理与实践[M]. 北京: 人民邮电出版社, 2010.
[21] 魏永田, 孟大伟, 温嘉斌. 电机内热交换[M]. 北京: 机械工业出版社, 1998.
[22] Aldo Boglietti, Andrea Cavagnino, David Staton, et al.Evolution and modern approaches for thermal analysis of electrical machines[J]. IEEE Transactions on Industrial Electronics, 2009, 56(3): 871-882.
[23] 禹国栋. 高真空永磁无刷直流电机温度场研究[D]. 哈尔滨: 哈尔滨工业大学, 2012.