开关磁阻电机固定频率预测电流控制策略
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摘要
针对开关磁阻电机(SRM)传统电流斩波控制(CCC)开关频率不固定、电流跟踪效果差的问题,提出了一种固定频率的无差拍预测电流控制(DPCC)算法。基于对SRM静态电磁特性的精确解析拟合,建立SRM离散预测模型。为了减小转矩脉动,利用无差拍理论实时计算下一时刻所需电压,实现对电机参考电流的精确跟踪。为进一步提高效率,采用新型转矩分配函数代替传统线性转矩分配函数。基于试验样机测试数据,在MATLAB/Simulink中搭建仿真模型,对所提出的算法进行仿真分析。仿真结果表明,所提出的固定频率DPCC方法相比传统CCC方法,具有更小的电流跟踪误差,并且能够有效减小SRM的转矩脉动,提高系统效率。
Aiming at solving the problem that the conventional current chopping control(CCC) of switched reluctance motor(SRM) had the disadvantages of unfixed switching frequency and poor current tracking performance,a fixed frequency deadbeat predictive current control(DPCC) algorithm was proposed. The discrete prediction model of SRM was established based on the accurate analytic fitting of SRM static electromagnetic characteristics. In order to reduce the torque ripple,the deadbeat theory was used to calculate the voltage needed at the next moment to realize accurate tracking of the motor reference current. In order to further improve the efficiency,a new type torque-sharing function was used instead of the traditional liner function. Based on the test data of the test prototype,a simulation platform was built in MATLAB/Simulink,and the simulation analysis was carried out. The simulation results showed that the proposed fixed frequency DPCC had a smaller current tracking error compared with the conventional CCC method,it also could effectively reduce the torque ripple of the SRM and improve the system efficiency.
Aiming at solving the problem that the conventional current chopping control(CCC) of switched reluctance motor(SRM) had the disadvantages of unfixed switching frequency and poor current tracking performance,a fixed frequency deadbeat predictive current control(DPCC) algorithm was proposed. The discrete prediction model of SRM was established based on the accurate analytic fitting of SRM static electromagnetic characteristics. In order to reduce the torque ripple,the deadbeat theory was used to calculate the voltage needed at the next moment to realize accurate tracking of the motor reference current. In order to further improve the efficiency,a new type torque-sharing function was used instead of the traditional liner function. Based on the test data of the test prototype,a simulation platform was built in MATLAB/Simulink,and the simulation analysis was carried out. The simulation results showed that the proposed fixed frequency DPCC had a smaller current tracking error compared with the conventional CCC method,it also could effectively reduce the torque ripple of the SRM and improve the system efficiency.
引文
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[15]MIKAIL R,HUSAIN I,SOZER Y,et al.Torqueripple minimization of switched reluctance machines through current profiling[J].IEEE Transactions on Industry Applications,2013,49(3):1258-1267.
[16]王宏华.开关磁阻电动机调速控制技术[M].北京:机械工业出版社,2014.
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[19]王喜莲,许振亮,王翠.开关磁阻电机转矩脉动与铜耗最小化控制研究[J].电机与控制学报,2015,19(7):52-57.
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[2]陈飞,瞿遂春,邱爱兵,等.电动车用开关磁阻电机设计与优化方法[J].电机与控制应用,2017,44(10):114-118.
[3]傅登伟,肖文生,崔俊国,等.8型抽油机用开关磁阻电机磁极结构优化设计[J].电机与控制应用,2014,41(12):15-20.
[4]林显军,程小华.开关磁阻风力发电技术[J].电机与控制应用,2011,38(9):46-50.
[5]BILGIN B,EMADI A,KRISHNAMURTHY M.Design considerations for switched reluctance machines with a higher number of rotor poles[J].IEEE Transactions on Industrial Electronics,2012,59(10):3745-3756.
[6]吴红星.开关磁阻电机系统理论与控制技术[M].北京:中国电力出版社,2010.
[7]HUSAIN I,HOSSAIN S A.Modeling,simulation,and control of switched reluctance motor drives[J].IEEE Transactions on Industrial Electronics,2005,52(6):1625-1634.
[8]INDERKA R B,DE D R W A A.DITC-direct instantaneous torque control of switched reluctance drives[J].IEEE Transactions on Industry Applications,2003,39(4):1046-1051.
[9]何昆仑,许爱德,曹玉昭,等.基于12扇区的开关磁阻电机直接转矩控制脉动抑制研究[J].电机与控制应用,2016,43(10):19-23.
[10]王勉华,彭田野,张朴,等.四相开关磁阻电机的四电平DITC调速系统[J].电机与控制应用,2015,42(1):14-21.
[11]ZHANG R,ZHANG Y,QIAN X,et al.Direct instantaneous torque control of switched reluctance motor based on adaptive backstepping[C]∥International Conference on Electrical Machines and Systems,2015:567-572.
[12]SAHOO S K,PANDA S K,XU J X.Indirect torque control of switched reluctance motors using iterative learning control[J].IEEE Transactions on Power Electronics,2005,20(1):200-208.
[13]姚雪莲,齐瑞云,邓智泉,等.基于在线模糊神经网络建模的开关磁阻电机高性能转矩控制[J].电机与控制应用,2011,38(3):17-22.
[14]潘晓晨,张广明,王德明.基于改进转矩分配函数法的转矩间接控制[J].电机与控制应用,2016,43(5):1-6.
[15]MIKAIL R,HUSAIN I,SOZER Y,et al.Torqueripple minimization of switched reluctance machines through current profiling[J].IEEE Transactions on Industry Applications,2013,49(3):1258-1267.
[16]王宏华.开关磁阻电动机调速控制技术[M].北京:机械工业出版社,2014.
[17]LE H H,BRUNELLE P.A versatile nonlinear switched reluctance motor model in Simulink using realistic and analytical magnetization characteristics[C]∥Conference of IEEE Industrial Electronics Society,2005:6.
[18]XUE X D,CHENG K W E,HO S L.Optimization and evaluation of torque-sharing functions for torque ripple minimization in switched reluctance motor drives[J].IEEE Transactions on Power Electronics,2009,24(9):2076-2090.
[19]王喜莲,许振亮,王翠.开关磁阻电机转矩脉动与铜耗最小化控制研究[J].电机与控制学报,2015,19(7):52-57.
[20]JOSE R,PATRICIO C.Predictive control of power converters and electrical drives[M].Hoboken:John Wiley&Sons,2012.