Direct Torque Control Algorithm for Eight-Switch Three-Phase Inverter-Fed Induction Motor Drives
Tang Qidi1, 2, Ge Xinglai2, Liu Yongchao2, Zhang Chengxiang2
1. Ministry of Education Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle Southwest Jiaotong University Chengdu 610031 China; 2. School of Electrical Engineering Southwest Jiaotong University Chengdu 610031 China
Abstract：This paper proposes a direct torque control (DTC) algorithm for eight-switch three-phase inverter (ESTPI)-fed induction motor drives to suppress DC-link capacitor voltage fluctuation. Firstly, in all ESTPI’s sectors, the variations of the motor torque, flux linkage and the two DC-link capacitor voltage with the applied basic voltage vector are analyzed in detail. In order to control the motor flux linkage and torque while balancing the two DC-link capacitor voltage values, a new vector selection lookup table is designed. Then, this algorithm adds the capacitor voltage hysteresis regulator based on the torque and flux hysteresis regulators of the traditional DTC system. The switching state of ESTPI can hence be controlled by these hysteresis regulators. Finally, the proposed control algorithm is verified by the simulation and experimental results.
唐启迪, 葛兴来, 刘勇超, 张呈象. 八开关三相逆变器-感应电机传动系统直接转矩控制算法[J]. 电工技术学报, 2018, 33(6): 1293-1301.
Tang Qidi, Ge Xinglai, Liu Yongchao, Zhang Chengxiang. Direct Torque Control Algorithm for Eight-Switch Three-Phase Inverter-Fed Induction Motor Drives. Transactions of China Electrotechnical Society, 2018, 33(6): 1293-1301.
[1] 刘勇超, 葛兴来, 冯晓云. 基于叠加原理的八开关三相逆变器全调制度范围内两种等效PWM算法[J]. 电工技术学报, 2015, 30(15): 96-108. Liu Yongchao, Ge Xinglai, Feng Xiaoyun.Two types of equivalent PWM algorithms in the full modulation region for eight-switch three-phase inverter based on the superposition principle[J]. Transactions of China Electrotechnical Society, 2015, 30(15): 96-108. [2] 葛兴来, 冯晓云, 韩坤, 等. 三电平牵引变流器无拍频控制的硬件在回路实时仿真[J]. 电工技术学报, 2014, 29(8): 204-210. Ge Xinglai, Feng Xiaoyun, Han Kun, et al.Hardware- in-the-loop application of beat-less control scheme for three-level traction inverter system[J]. Transa- ctions of China Electrotechnical Society, 2014, 29(8): 204-210. [3] 李永东, 侯轩, 谭卓辉. 三电平逆变器异步电动机直接转矩控制系统(II)——合成矢量法[J]. 电工技术学报, 2004, 19(5): 31-35. Li Yongdong, Hou Xuan, Tan Zhuohui.Direct torque control of induction motor fed by three level inverter(II)——method of synthesizing vectors[J]. Transactions of China Electrotechnical Society, 2004, 19(5): 31-35. [4] 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, 30(3): 14-20. An Quntao, Sun Xingtao, Zhao Ke, et al.Control strategy for fault-tolerant three-phase four-switch inverters[J]. Proceedings of the CSEE, 2010, 30(3): 14-20. [5] Ribeiro R L A, Jacobina C B, da Silva E R C, et al. Fault-tolerant voltage-fed PWM inverter AC motor drive system[J]. IEEE Transactions on Industrial Electronics, 2004, 51(2): 439-446. [6] 刘勇超, 葛兴来. 三种三相四开关逆变器SVPWM策略内在联系[J]. 电源学报, 2014, 12(5): 28-34. Liu Yongchao, Ge Xinglai.Relationship among three SVPWM strategies of four-switch three-phase inver- ter[J]. Journal of Power Supply, 2014, 12(5): 28-34. [7] Lin B R, Wei T C.Space vector modulation strategy for an eight-switch three-phase NPC converter[J]. IEEE Transactions on Aerospace and Electronic Systems, 2004, 40(2): 553-566. [8] Park G T, Kim T J, Kang D W, et al.Control method of NPC inverter for continuous operation under one phase fault condition[C]//IEEE Conference on IAS, Seattle, WA, 2004: 2188-2193. [9] Liu Y C, Ge X, Tang Q.Relationship between two different space-vector modulation methods of eight- switch three-phase inverters[C]//Proceedings of the 8th IEEE Power Electronics and Motion Control Conference-ECCE Asia, Hefei, China, 2016: 22-26. [10] Kim T J, Lee W C, Hyun D S.Detection method for open-circuit fault in neutral-point-clamped inverter systems[J]. IEEE Transactions on Industrial Electro- nics, 2009, 56(7): 2754-2763. [11] Nguyen T D, Tuong N D, Lee H H.Carrier-based strategy for post-fault reconfigured 3-level NPC inverter under imbalanced DC-link voltage[C]//Pro- ceedings of the 8th IEEE Power Electronics and Motion Control Conference-ECCE Asia, Hefei, China, 2016: 22-26. [12] Liu T H, Fu J R, Lipo T A.A strategy for improving reliability of field-oriented induction motor drives[J]. IEEE Transactions on Industry Applications, 1993, 29(5): 910-918. [13] Lascu C, Boldea I, Blaabjerg F.A modified direct torque control for induction motor sensorless drive[J]. IEEE Transactions on Industry Applications, 2000, 36(1): 122-130. [14] Wang Z, Chen J, Cheng M, et al.Field-oriented control and direct torque control for paralleled VSIs fed PMSM drives with variable switching frequencies[J]. IEEE Transactions on Power Electronics, 2016, 31(3): 2417-2428. [15] 袁登科, 陶生桂. 一种感应电机直接转矩控制系统性能改善方案[J]. 中国电机工程学报, 2005, 25(8): 151-155. Yuan Dengke, Tao Shenggui.An improved scheme of the direct torque control system of induction motor[J]. Proceedings of the CSEE, 2005, 25(8): 151-155. [16] 李政学, 张永昌, 李正熙, 等. 基于简单占空比调节的异步电机直接转矩控制[J]. 电工技术学报, 2015, 30(1): 72-80. Li Zhengxue, Zhang Yongchang, Li Zhengxi, et al.A direct torque control strategy of induction motor drives with simple duty ratio regulator[J]. Transa- ctions of China Electrotechnical Society, 2015, 30(1): 72-80. [17] Blaabjerg F, Freysson S, Hansen H H, et al.A new optimized space-vector modulation strategy for a component-minimized voltage source inverter[J]. IEEE Transactions on Power Electronics, 1997, 12(4): 704-714. [18] 孙丹, 何宗元, Ivonne Yznaga Blanco, 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, 27(21): 47-52. Sun Dan, He Zongyuan, Ivonne Yznaga Blanco, et al.Torque ripple reduction for a four-switch inverter fed PMSM DTC system[J]. Proceedings of the CSEE, 2007, 27(21): 47-52. [19] 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, 25(18): 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]. Proceedings of the CSEE, 2005, 25(18): 140-145. [20] Tang Q, Ge X, Liu Y C.Performance analysis of two different SVM-based field-oriented control schemes for eight-switch three-phase inverter-fed induction motor drives[C]//Proceedings of the 8th IEEE Power Electronics and Motion Control Conference-ECCE Asia, Hefei, China, 2016: 22-26. [21] Baptista B R O, Abadi M B, Mendes A M S, et al. The performance of a three-phase induction motor fed by a three-level NPC converter with fault tolerant control strategies[C]//Proceedings of the IEEE 9th International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives, Valencia, Spain, 2013: 497-504. [22] Abdelghani H B, Abdelghani A B B, Slama- Belkhodja I. Three level fault tolerant DTC control for induction machine drives[C]//Proceedings of the 9th International Multi-Conference on Systems, Signals and Devices (SSD), Chemnitz, Germany, 2012: 1-6. [23] 刘勇超. 八开关三相逆变器脉宽调制和预测控制算法研究[D]. 成都: 西南交通大学, 2016. [24] 冯晓云. 电力牵引交流传动及其控制系统[M]. 北京: 高等教育出版社, 2009. [25] 李永东. 交流电机数字控制系统[M]. 北京: 机械工业出版社, 2012.
2018, Vol. 33 
