第6期 马保柱等:基于空间矢量脉宽调制的永磁同步电动机直接磁链控制 .679. 20r Proe Chin Soc Electr Eng.2006.26(13):151 (冯江华,许峻峰。永磁同步电机直接转矩控制系统转矩调节 日15 新方法,中国电机工程学报,2006,26(13):151) [3]Liu J.Chu X G.Bai H Y.Study of permanent magnet syn- chronous motor direct torque control based on the strategy of ref- erence stator flux linkage and voltage space vector modulation. Trans China Electrotech Soc,2005.20(6):11 0.050.100.150.200.25 (刘军,楚小刚,白华煜.基于参考磁链电压空间矢量调制策 时间s 略的永磁同步电机直接转矩控制研究.电工技术学报,2005, 20(6):11) 图6基于CVC的转矩动态响应 [4]Zhu Y.She Y.Jiang J G.Improved space vector modulation Fig.6 Dynamie torque response based on CVC technique for direet torque Control.Small Spec Electr Mach, 图6显示,由于进入了弱磁区域,电流调节器已 2006(3):28 经饱和,所以转矩响应性能变得不稳定;而采用直接 (朱琰,佘焱,姜建国,一种改进的直接转矩控制电压矢量调 制方法,微特电机,2006(3):28) 磁链控制(如图5所示),由于此时过调制策略开始 [5]Kang J K.Sul S K.New direet torque control of induction motor 起作用,所以速度和转矩响应较快,且动态响应时间 for minimum torque ripple and constant switching frequency 相对较短,约为80ms,比采用CVC方法缩短了近一 IEEE Trans Ind Appl.1999.35(5):1076 半的时间. [6]Sun D.He Y K.Space vector modulated based constant switching frequency direet torque control for permanent magnet synchronous 4结论 motor.Proc Chin Soc Electr Eng.2005.25(12):112 (孙丹,贺益康,基于恒定开关颜率空间矢量调制的永磁同步 本文提出了一种基于定子磁链直接控制的动态 电机直接转矩控制.中国电机工程学报,2005,25(12):112) 及静态转矩控制方案,通过设置相应的约束条件可 [7]Tang L.Zhong L.Rahman M F,et al.A novel direct torque 以实现弱磁控制区较好的动态及静态转矩特性,此 control scheme for interior permanent magnet synchronous ma- 方案由基本的DTC方案而来,但具有恒定开关频率 chine drive system with low ripple in torque and flux,and fixed switching frequency//IEEE PESC.2002:529 及减小转矩和磁链脉动等优点,转矩的动态响应显 [8]Jawad F S.Hossein MZ.A novel technique for estimation and 示在恒功率区可获得最佳的转矩,与传统的方案相 control of stator flux of a salient pole PMSM in DTC method 比,新提出方案在较宽的速度运行范围提高了系统 based on MTPF.IEEE Trans Ind Electron,2003,50(2):262 的动静态响应,仿真证明了所提出方案的可行性, [9]Liu Q H.Khambadkone A M,Tripathi A.et al.Torque control of IPMSM drives using direct flux control for wide speed opera- 参考文献 tion.IEEE International Electric Machine Drives Conference. 2003:188 [1]Zhong L.Rahman M F.Hu W Y,et al.Analysis of direct of di- rect torque control in permanent synchronous motor drives.IEEE [10]Tripathi A.Khambadkone A M.Dynamic torque control perfor- Trans Power Electron.1997.12(3):528 mance of the direct flux control scheme in field weakening range [2]Feng J H.Xu J F.A new torque adjustment method of perma- /Industrial Electronics Conference Proceedings.2003.1:220 nent magnet synchronous machines direct torque control system.图6 基于 CVC 的转矩动态响应 Fig.6 Dynamic torque response based on CVC 图6显示由于进入了弱磁区域电流调节器已 经饱和所以转矩响应性能变得不稳定;而采用直接 磁链控制(如图5所示)由于此时过调制策略开始 起作用所以速度和转矩响应较快且动态响应时间 相对较短约为80ms比采用 CVC 方法缩短了近一 半的时间. 4 结论 本文提出了一种基于定子磁链直接控制的动态 及静态转矩控制方案通过设置相应的约束条件可 以实现弱磁控制区较好的动态及静态转矩特性.此 方案由基本的 DTC 方案而来但具有恒定开关频率 及减小转矩和磁链脉动等优点转矩的动态响应显 示在恒功率区可获得最佳的转矩.与传统的方案相 比新提出方案在较宽的速度运行范围提高了系统 的动静态响应.仿真证明了所提出方案的可行性. 参 考 文 献 [1] Zhong LRahman M FHu W Yet al.Analysis of direct of direct torque control in permanent synchronous motor drives.IEEE T rans Power Electron199712(3):528 [2] Feng J HXu J F.A new torque adjustment method of permanent magnet synchronous machines direct torque control system. Proc Chin Soc Electr Eng200626(13):151 (冯江华许峻峰.永磁同步电机直接转矩控制系统转矩调节 新方法.中国电机工程学报200626(13):151) [3] Liu JChu X GBai H Y.Study of permanent magnet synchronous motor direct torque control based on the strategy of reference stator flux linkage and voltage space vector modulation. T rans China Electrotech Soc200520(6):11 (刘军楚小刚白华煜.基于参考磁链电压空间矢量调制策 略的永磁同步电机直接转矩控制研究.电工技术学报2005 20(6):11) [4] Zhu YShe YJiang J G.Improved space vector modulation technique for direct torque Control. Small Spec Electr Mach 2006(3):28 (朱琰佘焱姜建国.一种改进的直接转矩控制电压矢量调 制方法.微特电机2006(3):28) [5] Kang J KSul S K.New direct torque control of induction motor for minimum torque ripple and constant switching frequency. IEEE T rans Ind Appl199935(5):1076 [6] Sun DHe Y K.Space vector modulated based constant switching frequency direct torque control for permanent magnet synchronous motor.Proc Chin Soc Electr Eng200525(12):112 (孙丹贺益康.基于恒定开关频率空间矢量调制的永磁同步 电机直接转矩控制.中国电机工程学报200525(12):112) [7] Tang LZhong LRahman M Fet al.A novel direct torque control scheme for interior permanent magnet synchronous machine drive system with low ripple in torque and fluxand fixed switching frequency∥ IEEE PESC2002:529 [8] Jawad F SHossein M Z.A novel technique for estimation and control of stator flux of a salient-pole PMSM in DTC method based on MTPF.IEEE T rans Ind Electron200350(2):262 [9] Liu Q HKhambadkone A MTripathi Aet al.Torque control of IPMSM drives using direct flux control for wide speed operation.IEEE International Electric Machine Drives Conference 2003:188 [10] Tripathi AKhambadkone A M.Dynamic torque control performance of the direct flux control scheme in field weakening range ∥ Industrial Electronics Conference Proceedings20031:220 第6期 马保柱等: 基于空间矢量脉宽调制的永磁同步电动机直接磁链控制 ·679·