直线振荡电机谐振频率跟踪控制技术研究
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摘要
针对直线压缩机控制复杂,传统压缩机运行效率低的问题,提出一种基于二阶广义积分控制的谐振频率跟踪的直线电机控制方式(SOGI-RFTC)。该控制方法控制行程稳定,检测位移信号x和电流信号i,利用谐振下位移x和电流i相序成90°的特点,经过锁频和坐标变换,将交流信号转化为直流信号控制,经过PI控制器实现信号的无静差跟踪控制。二阶广义积分控制器在锁相前可以滤出输入信号的采样噪声和高频干扰,提高控制器的稳定性。仿真和实验结果表明,所提出的谐振频率跟踪控制可以快速跟踪电机固有机械频率,提高系统效率,验证了理论的合理性和有效性。
Linear compressor driven by linear oscillatory actuator is more efficient and easier to control than traditional rotary motor. In order to improve the efficiency of linear compressor,a method based on second order general integral resonant frequency tracking control( SOGI-RFTC) is proposed. The steadystate displacement signal x and current signal i were sensed under the control of stroke stability. Based on theory that phase shift between actuator displacement and current is 90° when drive frequency equals to mechanical resonant frequency,the AC signal was transformed into DC signal by frequency locked loop and coordinate transformation. Then PI controller was used to achieve zero steady-state error. Besides,the second order general integral controller was adopted to filter out the sampling noise and high frequency interference of the input signal,which improves the stability of the controller. The simulation and experimental results show that the proposed resonant frequency tracking control can quickly track the inherent mechanical frequency of the Actuator and improve the efficiency of the system.
Linear compressor driven by linear oscillatory actuator is more efficient and easier to control than traditional rotary motor. In order to improve the efficiency of linear compressor,a method based on second order general integral resonant frequency tracking control( SOGI-RFTC) is proposed. The steadystate displacement signal x and current signal i were sensed under the control of stroke stability. Based on theory that phase shift between actuator displacement and current is 90° when drive frequency equals to mechanical resonant frequency,the AC signal was transformed into DC signal by frequency locked loop and coordinate transformation. Then PI controller was used to achieve zero steady-state error. Besides,the second order general integral controller was adopted to filter out the sampling noise and high frequency interference of the input signal,which improves the stability of the controller. The simulation and experimental results show that the proposed resonant frequency tracking control can quickly track the inherent mechanical frequency of the Actuator and improve the efficiency of the system.
引文
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[12]辛振,赵仁德,郭宝玲.基于二阶广义积分器-锁频环的异步电机同步角频率估计方法[J].电工技术学报,2014,29(1):32.XING Zhen,ZHAO Rende,GUO Baoling.New induction motor synchronous angular frequency estimation method based on second order generalized integrator-frequency locked loop[J].Transactions of China Electrotechnical Society,2014,29(1):32.
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[14]雷美珍,戴文战,夏永明.直线压缩机用无内定子动磁式直线振荡电机的建模与分析[J].电机与控制学报,2014,18(14):45.LEI Meizhen,DAI Wenzhan,XIA Yongming.Modeling and analysis of moving-magnet linear motor with no inner-teeth for linear compressor[J].Electric Machines and Control,2014,18(14):45.
[2]SM Jang,JY Choi,HW Cho,et al.Comparison and dynamic behavior of moving-coil linear oscillatory actuator with/without mechanical spring driven by rectangular voltage source[C]//IEEEInternational Conference on Electrical Machines and Systems(ICEMS),October 8-10,2007,Seoul,Korea.2007,874-877.
[3]Z Peng,L Zhihai,Z Shuiying.Control system of linear compressor based on bidirectional triode thyristor[C]//Third International Conference on Measuring Technology and Mechatronics Automation,January 6-7,2011,Shangshai,China,2011,782-785.
[4]陈梁远,李黎川.压缩机用直线电机及其关键技术发展综述[J].中国电机工程学报,2013,33(15):52.CHEN Liangyuan,LI Lichuan.Development of the linear motor and its key technologies for compressors[J].Proceedings of the CSEE,2013,33(15):52.
[5]SUN Daming,DIETRICH M,THUMMES G.Investigation on highpower stirling-type pulse tube coolers for cooling HTS motors[J].IEEE Transactions on Applied Superconductors,2012,22(3):4703704.
[6]SANADA M,MORIMOTO S,TAKEDA Y.Analyses for sensorless linear compressor using linear pulse motor[C]//IEEE 34th Industry Applications Conference,October 3-7,1999,Phoenix,USA.1999,4:2298-2304.
[7]YOSHIDA M,HASEGAWA S,UEDA M.Driving apparatus of a linear compressor:USA,US6832898[P].2004-12-21.
[8]TW Chun,JR Ahn,HH Lee,et al.Novel strategy of efficiency control for a linear compressor system driven by a PWM inverter[J].Transactions on Industrial Electronics,2008,55(1):296.
[9]LIN Z,WANG J,HOWE D.Resonant frequency tracking technique for linear vapor compressors[C]//2007 IEEE International Electric Machines and Drives Conference,May 3-5,2007,Antalya,Turkey.2007,1:370-375.
[10]于明湖,张玉秋,叶云岳等.直线振荡电机谐振频率跟踪策略研究[C]//第29届中国控制会议,7月29-31日,2010,北京,中国.2010,7:3348-3351.
[11]费腾.用于冰箱压缩机的直线振荡电机设计与性能分析[D].南京:东南大学,2014.32-35.
[12]辛振,赵仁德,郭宝玲.基于二阶广义积分器-锁频环的异步电机同步角频率估计方法[J].电工技术学报,2014,29(1):32.XING Zhen,ZHAO Rende,GUO Baoling.New induction motor synchronous angular frequency estimation method based on second order generalized integrator-frequency locked loop[J].Transactions of China Electrotechnical Society,2014,29(1):32.
[13]于明湖,张玉秋,叶云岳,等.双定子直线振荡电机谐振特性分析[J].电机与控制学报,2010,14(8):1.YU Minghu,ZHANG Yuqiu,YE Yunyue,et al.Resonant frequency characteristic analysis of linear oscillatory motor with two separated stators[J].Electric Machines and Control,2010,14(8):1.
[14]雷美珍,戴文战,夏永明.直线压缩机用无内定子动磁式直线振荡电机的建模与分析[J].电机与控制学报,2014,18(14):45.LEI Meizhen,DAI Wenzhan,XIA Yongming.Modeling and analysis of moving-magnet linear motor with no inner-teeth for linear compressor[J].Electric Machines and Control,2014,18(14):45.