考虑小电感区电感变化量的开关磁阻电机开关角优化方法
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摘要
开关磁阻电机(switched reluctance motor,SRM)电磁特性具有高度非线性的特点,采用传统的开关角优化方法很难取得理想的控制效果。以三相12/8极SRM为研究对象,采用有限元方法计算了样机的电磁特性,分析了小电感区的非线性特点,建立了电机小电感区内的非线性数学模型,推导了最优开通角的解析式,根据开通角解析式与电机运行时的磁链变化规律,得出了最优关断角解析式,实现了不同转速下开通角与关断角的自适应调节。实验结果表明:改进的开关角优化方法简单有效,提高了系统运行效率和带载能力。
It is hard to get good performance by using the traditional method to optimize turn-on and turnoff angles because of the high nonlinearity of switched reluctance machine( SRM). The prototype is a three-phase,12/8-pole SRM. The electromagnetic characteristics of the prototype were obtained by finite element method and the feature in low-inductance period was discussed. The non-linear model of inductance in the low-inductance region was established and the analytical formula of optimal turn-on angle was deduced. The analytical formula of optimal turn-off angle was also deduced according to the turn-on angle and the flux-linkage variation law when prototype operated. The adaptive adjustment of switch angle at different speeds was achieved. The experimental results show that the optimization methods of turn-on and turn-off angle are simple,which can improve the efficiency and load capacity.
It is hard to get good performance by using the traditional method to optimize turn-on and turnoff angles because of the high nonlinearity of switched reluctance machine( SRM). The prototype is a three-phase,12/8-pole SRM. The electromagnetic characteristics of the prototype were obtained by finite element method and the feature in low-inductance period was discussed. The non-linear model of inductance in the low-inductance region was established and the analytical formula of optimal turn-on angle was deduced. The analytical formula of optimal turn-off angle was also deduced according to the turn-on angle and the flux-linkage variation law when prototype operated. The adaptive adjustment of switch angle at different speeds was achieved. The experimental results show that the optimization methods of turn-on and turn-off angle are simple,which can improve the efficiency and load capacity.
引文
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[14]朱曰莹,赵桂范,杨娜.电动汽车用开关磁阻电机驱动系统设计及优化[J].电工技术学报,2014,29(11):88.ZHU Yueying,ZHAO Guifan,YANG Na. Design and optimiza-tion for switched reluctance motor drive system in electric vehicles[J]. Transactions of China Electrotechnical Society,2014,29(11):88.
[15] SOZER Y,TORREY D A. Optimal turn-off angle control in theface of automatic turn-on angle control for switched-reluctancemotors[J]. Iet Electric Power Applications,2007,1(3):395.
[16] KIM J,KRISHNAN R. High efficiency single-pulse controlledswitched reluctance motor drive for high speed(48k RPM)appli-cation:analysis,design,and experimental verification[J]. IEEEIndustry Applications Society Annual Meeting,2008:1.
[17] XU Y Z,ZHONG R,CHEN L,et al. Analytical method to opti-mise turn-on angle and turn-off angle for switched reluctance mo-tor drives[J]. Iet Electric Power Applications,2012,6(9):593.
[2]曲兵妮,宋建成.开关磁阻电动机互感特性及其对转矩的影响[J].电机与控制学报,2009,13(3):332.QU Bingni,SONG Jiancheng. Mutual inducatance of switched re-luctance motor and its effect on torque[J]. Electric Machine andControl,2009,13(3):332.
[3] KIYOTA K,KAKISHIMA T,CHIBA A,et al,Cylindrical rotor de-sign for acoustic noise and windage loss reduction in switched re-luctance motor for HEV applications[C]//IEEE Transactions onIndustry Applications,vol. 52,no. 1,pp. 154,Jan.-Feb. 2016.
[4]宋建成,郑建斌,曲兵妮,等.开关磁阻电机的最小二乘支持向量机建模与仿真[J].电机与控制学报,2010,14(5):32.SONG Jiancheng,ZHENG Jianbin,QU Bingni,et al. Modelingand simulation for switched reluctance motor based on least squaressupport vector machine[J]. Electric Machine and Control,2010,14(5):32.
[5] SOZER Y,TORREY D A. Optimal turn-off angle control in theface of automatic turn-on angle control for switched-reluctance mo-tors[J]. Iet Electric Power Applications,2007,1(3):395.
[6] QU B,SONG J,JIA H,et al. Nonlinear modeling of switched re-luctance machine[C]//International Conference on ElectricalMachines and Systems. IEEE,2011:1.
[7] KIOSKERIDIS I,MADEMLIS C. Maximum efficiency in single-pulse controlled switched reluctance motor drives[J]. IEEE Trans-actions on Energy Conversion,2005,20(4):809.
[8] XU Y Z,ZHONGH R,CHEN L,et al. Analytical method to opti-mise turn-on angle and turn-off angle for switched reluctance motordrives[J]. Iet Electric Power Applications,2012,6(9):593.
[9]丁树业,刘浩然,褚纪伦,等.基于APC控制的开关磁阻电机性能分析[J].电机与控制学报,2012,16(2):39.DING Shuye,LIU Haoran,CHU Jilun,et al. Performance analysisof aswitched reluctance motor based on the APC control[J]. Elec-tric Machine and Control,2012,16(2):39.
[10]王喜莲,王旭东.开关磁阻电机角度最优控制[J].电机与控制学报,2006,10(6):588.WANG Xilian, WANG Xudong. Angles optimal control ofswitched reluctance motor[J]. Electric Machine and Control,2006,10(6):588.
[11] CHESHMEHBEIGI H M,YARI S,YARI A R,et al. Self-tuningapproach to optimization of excitation angles for Switched-Reluc-tance Motor Drives using fuzzy adaptive controller[C]//Europe-an Conference on Power Electronics and Applications. IEEE,2009:1.
[12] BENO M M,MARIMUTHU N S,SINGH N A. Improving powerfactor in switched reluctance motor drive system by optimising theswitching angles[C]//TENCON 2008-2008 IEEE Region 10Conference. 2008:1.
[13] FAIZ J,REZAEEALAM B,PILLAY P. Adaptive performance im-provement of switched reluctance motor with two-phase excitation[J]. European Transactions on Electrical Power,2006,16(1):1.
[14]朱曰莹,赵桂范,杨娜.电动汽车用开关磁阻电机驱动系统设计及优化[J].电工技术学报,2014,29(11):88.ZHU Yueying,ZHAO Guifan,YANG Na. Design and optimiza-tion for switched reluctance motor drive system in electric vehicles[J]. Transactions of China Electrotechnical Society,2014,29(11):88.
[15] SOZER Y,TORREY D A. Optimal turn-off angle control in theface of automatic turn-on angle control for switched-reluctancemotors[J]. Iet Electric Power Applications,2007,1(3):395.
[16] KIM J,KRISHNAN R. High efficiency single-pulse controlledswitched reluctance motor drive for high speed(48k RPM)appli-cation:analysis,design,and experimental verification[J]. IEEEIndustry Applications Society Annual Meeting,2008:1.
[17] XU Y Z,ZHONG R,CHEN L,et al. Analytical method to opti-mise turn-on angle and turn-off angle for switched reluctance mo-tor drives[J]. Iet Electric Power Applications,2012,6(9):593.
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