基于DTC的异步电机三相六开关容错控制策略
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摘要
基于DTC的三相四开关逆变器容错控制策略只能解决单管故障问题,且具有转矩脉动大的缺点。在深入分析三相四开关和六开关逆变器电压矢量特点的基础上,充分挖掘正常开关管的潜能,在不改变逆变器拓扑结构和开关管数量的前提下,重构了单管故障状态下的电压矢量扇区和开关表,提出了一种在故障状态下的三相六开关容错控制策略,可形成六个电压矢量和一个零电压矢量,较三相四开关容错控制策略仅可提供四个电压矢量有明显改善。在此基础上,分析了三相六开关可能出现的连锁故障现象,并提出了相应的容错控制策略。仿真结果表明,所提出的三相六开关容错控制策略可有效降低转矩脉动,并可处理大部分开关管连锁故障的情况,具有更大的优越性。
The tolerant control strategy of three-phase four-switch inverter based on direct torque control can only solve the single-switch fault problem with the disadvantage of large torque ripple. By analyzing three-phase four-switch and six-switch inverter voltage vector characteristics,to make full use of the normal switches,the voltage vector sector and switch table at the inverter fault were reconstructed and a new kind of tolerant control strategy,three-phase six-switch tolerant control strategy,was proposed under the precondition of the same inverter topological structure and switch quantity. This new tolerant control strategy can provide six voltage vectors and one zero-voltage vector. It is better than the three-phase fourswitch tolerant control strategy which has only four voltage vectors to choose. Furthermore,the possible cascading faults of three-phase six-switch were analyzed and the corresponding tolerant control strategy was proposed. The simulation results show that the new tolerant control strategy proposed has more advantages such as effectively reducing the torque ripple and adaptability for the cascading faults.
The tolerant control strategy of three-phase four-switch inverter based on direct torque control can only solve the single-switch fault problem with the disadvantage of large torque ripple. By analyzing three-phase four-switch and six-switch inverter voltage vector characteristics,to make full use of the normal switches,the voltage vector sector and switch table at the inverter fault were reconstructed and a new kind of tolerant control strategy,three-phase six-switch tolerant control strategy,was proposed under the precondition of the same inverter topological structure and switch quantity. This new tolerant control strategy can provide six voltage vectors and one zero-voltage vector. It is better than the three-phase fourswitch tolerant control strategy which has only four voltage vectors to choose. Furthermore,the possible cascading faults of three-phase six-switch were analyzed and the corresponding tolerant control strategy was proposed. The simulation results show that the new tolerant control strategy proposed has more advantages such as effectively reducing the torque ripple and adaptability for the cascading faults.
引文
[1]张兰红,陆广平,陈冲.DTC异步电机驱动系统中逆变器故障工况研究[J].电机与控制学报,2011,15(4):58-66.ZHANG Lanhong,LU Guangping,CHEN Chong.Investigation of inverter fault mode behavior for DTC induction motor drive system[J].Electrical Machines and Control,2011,15(4):58-66.
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[7]ABDELGHANI H B,BENNANI A,ABDELGHANI B.Three level fault tolerant DTC control for induction machine drives[C]//9th International Multi-Conference on Systems,Signals and Devices,March 20-23,2012,Chemnitz,Germany.2012:1-6.
[8]张兰红,胡育文,黄文新.基于直接转矩控制技术的异步电机驱动系统两种容错方案研究[J].南京航空航天大学学报,2005,2(37):34-39.ZHANG Lanhong,HU Yuwen,HUANG Wenxin.Two tolerant schemes for induction machine drive system based on DTC strategy[J].Journal of Nanjing University of Aeronautics and Astronautics,2005,2(37):34-39.
[9]张兰红,胡育文,黄文新.容错型四开关三相变换器异步发电系统的直接转矩控制研究[J].中国电机工程学报,2005.9(25):140-145.ZHANG Lanhong,HU Yuwen,HUANG Wenxin.Research on direct torque control of tolerant type four-switch three-phase converter induction generation system[J].Proceeding of the CSEE,2005,9(25):140-145.
[10]SUN Dan,HE Yikang.A modified direct torque control for PMSM under inverter fault[C]//Proceedings of the Eighth International Conference on Electrical Machines and Systems,September 27-29,2005,Nanjing,China.2005:2469-2473.
[11]SUN Dan,MENG Jun.Research on fault tolerant inverter based permanent magnet synchronous motor direct torque control drives[C]//1st IEEE Conference on Industrial Electronics and Applications,May 24-26,2006,Singapore,Singapore.2006:1-5.
[12]AndréM.S.Mendes,XoséM.López-Fernández,António J.Marques Cardoso.Thermal performance of a three-phase induction motor under fault tolerant operating strategies[J].IEEE Power Electronics,2008,23:1537-1544.
[13]王成元,夏加宽,孙宜标,等.现代电机控制技术[M].北京.机械工业出版社,2010.
[2]任元,孙玉坤,朱纪洪.四相永磁容错电机的SVPWM控制[J].航空学报,2009,8(30):1490-1496.REN Yuan,SUN Yukun,ZHU Jihong.SVPWM control of fourphase fault-tolerant permanent magnet motor for aircraft[J].Acta Aeronautica Et Astronautica Sinica,2009,8(30):1490-1496.
[3]安群涛,孙醒涛,赵克,等.容错三相四开关逆变器控制策略[J].中国电机工程学报,2010,1(30):140-145.AN Quntao,SUN Xingtao,ZHAO Ke,et al.Control strategy for fault tolerant three phase four switch inverters[J].Proceeding of the CSEE,2010,1(30):140-145.
[4]孙丹,何宗元,IVONNE Y B,等.四开关逆变器供电永磁同步电机直接转矩控制系统转矩脉动抑制[J].中国电机工程学报,2007,7(27):47-52.SUN Dan,HE Zongyuan,IVONNE Y B,et al.Torque ripple reduction for a four-switch inverter fed PMSM DTC system[J].Proceeding of the CSEE,2007,7(27):47-52.
[5]郝振洋,胡育文,黄文新,等.永磁容错电机最优电流直接控制策略[J].中国电机工程学报,2011,2(31):46-51.HAO Zhenyang,HU Yuwen,HUANG Wenxin,et al.Optimal current direct control strategy for fault tolerant permanent magnet motor[J].Proceeding of the CSEE,2011,2(31):46-51.
[6]余文涛,胡育文,郝振洋,等.永磁容错电机最优转矩控制策略实验[J].航空学报,2010,8(31):1622-1628.YU Wentao,HU Yuwen,HAO Zhenyang,et al.Experimental study on optimal torque control of fault tolerant permanent magnet motor[J].Acta Aeronautica Et Astronautica Sinica,2010,8(31):1622-1628.
[7]ABDELGHANI H B,BENNANI A,ABDELGHANI B.Three level fault tolerant DTC control for induction machine drives[C]//9th International Multi-Conference on Systems,Signals and Devices,March 20-23,2012,Chemnitz,Germany.2012:1-6.
[8]张兰红,胡育文,黄文新.基于直接转矩控制技术的异步电机驱动系统两种容错方案研究[J].南京航空航天大学学报,2005,2(37):34-39.ZHANG Lanhong,HU Yuwen,HUANG Wenxin.Two tolerant schemes for induction machine drive system based on DTC strategy[J].Journal of Nanjing University of Aeronautics and Astronautics,2005,2(37):34-39.
[9]张兰红,胡育文,黄文新.容错型四开关三相变换器异步发电系统的直接转矩控制研究[J].中国电机工程学报,2005.9(25):140-145.ZHANG Lanhong,HU Yuwen,HUANG Wenxin.Research on direct torque control of tolerant type four-switch three-phase converter induction generation system[J].Proceeding of the CSEE,2005,9(25):140-145.
[10]SUN Dan,HE Yikang.A modified direct torque control for PMSM under inverter fault[C]//Proceedings of the Eighth International Conference on Electrical Machines and Systems,September 27-29,2005,Nanjing,China.2005:2469-2473.
[11]SUN Dan,MENG Jun.Research on fault tolerant inverter based permanent magnet synchronous motor direct torque control drives[C]//1st IEEE Conference on Industrial Electronics and Applications,May 24-26,2006,Singapore,Singapore.2006:1-5.
[12]AndréM.S.Mendes,XoséM.López-Fernández,António J.Marques Cardoso.Thermal performance of a three-phase induction motor under fault tolerant operating strategies[J].IEEE Power Electronics,2008,23:1537-1544.
[13]王成元,夏加宽,孙宜标,等.现代电机控制技术[M].北京.机械工业出版社,2010.