Abstract：A direct torque control (DTC) strategy of T-type three-level inverter fed dual three-phase PMSM drives is proposed and studied in this paper. This system possesses the advantages of low torque pulsations, low current stress and strong fault tolerance from dual three-phase PMSM, while inheriting the characters of good harmonic performance and high reliability from T-type three-level inverter. The double space vector modulation (SVM) technology based direct torque control scheme proposed in this paper retains the fast dynamic performance of DTC. Compared to conventional vector space decomposition (VSD) based SVM technology, the proposed double SVMs technology can achieve good harmonic suppression effect, while avoiding complicated process of voltage vector synthesis. A closed-loop harmonic current controller is also designed in the proposed strategy, which can suppress the low order harmonics caused by caused by motor asymmetry, EMF harmonic and dead-time effectively. The experimental result are given to verify the validity and feasibility of the DTC strategy of T-type three-level inverter fed dual three-phase PMSM drives.
王学庆, 王政, 程明. T型三电平逆变器馈电双三相PMSM直接转矩控制[J]. 电工技术学报, 2017, 32(增刊1): 116-123.
Wang Xueqing, Wang Zheng, Cheng Ming. Direct Torque Control of T-Type Three-Level Inverter Fed Dual Three-Phase PMSM Drives. Transactions of China Electrotechnical Society, 2017, 32(增刊1): 116-123.
[1] Levi E. Multiphase electric machines for variable- speed applications[J]. IEEE Transactions on Industrial Electronics, 2008, 55(5): 1893-1909. [2] Lillo L D, Empringham L P, Wheeler W, et al. Multiphase power converter drive for fault-tolerant machine development in aerospace applications[J]. IEEE Transactions on Industrial Electronics, 2010, 57(2): 575-583. [3] Lee J S, Lee K B. An open-switch fault detection method and tolerance controls based on SVM in a grid-connected T-type rectifier with unity power factor[J]. IEEE Transactions on Industrial Electronics, 2014, 61(12): 7092-7104. [4] Choi U M, Lee K B, Blaabjerg F. Diagnosis and tolerant strategy of an open-switch fault for T-type three-level inverter systems[J]. IEEE Transactions on Industrial Applications, 2014, 50(1): 495-508. [5] Choi U M, Blaabjerg F, Lee K B. Reliability improvement of a T-type three-level inverter with fault-tolerant control strategy[J]. IEEE Transactions on Power Electronics, 2015, 30(5): 2660-2673. [6] Takahashi I, Noguchi T. A new quick-response and high efficiency control strategy of an induction machine [J]. IEEE Transactions on Industrial Applications, 1986, 22(5): 820-827. [7] Tiitinen P, Pohjalainen P, Lalu J. Next generation motion control method: direct torque control[J]. IEEE Transactions on Magnetics, 1995, 5(1): 14-18. [8] Klingshirn E A. High phase order induction motors- part I-description and theoretical considerations[J]. IEEE Transactions on Power Apparatus and Systems, 1983, 102(1): 47-53. [9] Zhao Yifan, Lipo T A. Space vector PWM control of dual three-phase induction machine using vector space decomposition[J]. IEEE Transactions on Industrial Applications, 1995, 31(5): 1100-1109. [10] Wang Xueqing, Wang Zheng, Chen Jian, et al. Direct torque control of dual three-phase PMSM drives based on two-step voltage vector synthesis SVM[C]// IEEE 8th International Power Electronics and Motion Control Conference, Hefei, China, 2016. [11] 李先祥, 肖红军, 黄道平. 三电平矢量控制的永磁同步伺服电动机调速系统[J]. 电工技术学报, 2004, 19(4): 28-32. Li Xianxiang, Xiao Hongjun, Huang Daoping. Permanent magnet synchronous motor control system based on three-level vector control[J]. Transactions of China Electrotechnical Society, 2004, 19(4): 28-32. [12] 张兵, 王政, 储凯, 等. NPC 型三电平逆变器容错控制模式下的母线电容电压波动分析及其抑制[J]. 电工技术学报, 2015, 30(7): 52-61. Zhang Bing, Wang Zheng, Chu Kai, et al. Analysis of fluctuation in DC link capacitor voltage of NPC three-level inverter and its mitigation under fault tolerant control mode[J]. Transactions of China Electrotechnical Society, 2015, 30(7): 52-61. [13] 姜卫东, 赵德勇, 胡杨, 等. 基于载波实现的二极管钳位型三电平逆变器虚拟空间矢量脉宽调制方法[J]. 电工技术学报, 2016, 31(12): 154-160. Jiang Weidong, Zhao Deyong, Hu Yang, et al. Carrier-based virtual space vector pulse width modulation for diode clamped three-level inverter[J]. Transactions of China Electrotechnical Society, 2016, 31(12): 154-160. [14] 陈健, 王政, 程明. 一种基于矢量空间解耦的三电平六相逆变器空间矢量调制策略[J]. 电工技术学报, 2016, 31(9): 101-111. Chen Jian, Wang Zheng, Cheng Ming. Design of a space vector modulation strategy based on vector space decomposition for three-level six-phase inverters [J]. Transactions of China Electrotechnical Society, 2016, 31(9): 101-111. [15] Swierczynski D, Kazmierkowski M P, Blaabjerg F. DSP based direct torque control of permanent magnet synchronous motor (PMSM) using space vector modulation[C]//International Symposium on Industrial Electronics, 2002: 723-727.
2017, Vol. 32 
