Abstract：Hybrid-inverter driven open winding permanent magnet synchronous motor (HI-OW-PMSM) system has the advantages of high power factor, high voltage utilization, and high control accuracy. However, when the field-oriented control strategy is implemented in the HI-OW-PMSM system, an extra power distribution module is essential for the capacitor voltage constraint. The power distribution module limits the voltage ratio between two inverters, making a conventional overmodulation scheme challenging to be executed in the HI-OW-PMSM system. Therefore a novel overmodulation scheme considering power distribution is proposed. The influence of the conventional overmodulation scheme on the power balance of the HI-OW-PMSM system is analyzed. The modulation index of the stator voltage and the active voltage are redefined, and the overmodulation region is divided more accurately when considering the power distribution. Accordingly, a novel overmodulation scheme considering power balance is proposed. To balance the power of the HI-OW-PMSM system in the stator voltage overmodulation region and smooth the switching process from the linear modulation region to the overmodulation region, a stator voltage overmodulation scheme is proposed, and the reactive voltage is indirectly corrected. Furthermore, an active voltage overmodulation scheme is proposed, and the active voltage is corrected. Then, the proposed active voltage overmodulation scheme is derived from the case of six-step modulation, and the operation range of the HI-OW-PMSM system is further extended. In order to verify the superiority of the proposed method, comparative experimental studies among the conventional field-oriented control strategy (strategy Ⅰ), the conventional overmodulation strategy (strategy Ⅱ), and the proposed overmodulation strategy (strategy Ⅲ) are carried out in the experimental platform of the HI-OW-PMSM system. The static experimental results show that the critical speed of the proposed method is increased by about 14 % and 9 %, respectively. Besides, the current THD of the proposed method is smaller than strategy Ⅰ and strategy Ⅱ over the whole operation range. The dynamic experimental results show that the switching process among linear modulation, overmodulation, and six-step modulation regions is smooth. The following conclusions can be drawn from theoretical derivation and experimental analysis: (1) The power distribution cannot keep balance when the conventional overmodulation method is directly applied to the HI-OW-PMSM system. (2) The active voltage modulation index has been defined, and a more accurate boundary of the over-modulation region has been obtained when considering the power distribution constraint. (3) The stator voltage overmodulation method and the active voltage overmodulation method have been proposed, respectively. Thus, the balance of the power distribution in the overmodulation region and the smooth switching at the overmodulation boundary are realized. (4) Comparative experiments have been carried out, which verified that the proposed method has a broader operating range and smaller current THD than the conventional overmodulation method.
柯伟煌, 孙丹, 马志豪, 年珩, 赵建勇. 考虑功率分配的混合供电型开绕组永磁同步电机过调制算法[J]. 电工技术学报, 2023, 38(12): 3176-3187.
Ke Weihuang, Sun Dan, Ma Zhihao, Nian Heng, Zhao Jianyong. An Overmodulation Scheme Considering Power Distribution for Hybrid-Inverter Driven Open-Winding Permanent Magnet Synchronous Motor System. Transactions of China Electrotechnical Society, 2023, 38(12): 3176-3187.
[1] 张伟伟, 肖飞, 刘计龙, 等. 轨道交通车辆永磁同步牵引系统断电区穿越控制策略[J]. 电工技术学报, 2021, 36(16): 3483-3492. Zhang Weiwei, Xiao Fei, Liu Jilong, et al.Power-off area traversing control strategy of permanent magnet synchronous motor traction system in rail transit vehicle[J]. Transactions of China Electrotechnical Society, 2021, 36(16): 3483-3492. [2] Li Longfei, Xiao Jie, Zhao Yun, et al.Robust position anti-interference control for PMSM servo system with uncertain disturbance[J]. CES Transactions on Elec-trical Machines and Systems, 2020, 4(2): 151-160. [3] 姜哲, 卜飞飞, 潘子昊, 等. 永磁同步电机伺服系统改进型无差拍电流控制算法[J]. 电力工程技术, 2020, 39(6): 177-183. Jiang Zhe, Bu Feifei, Pan Zihao, et al.Improved deadbeat current control algorithm for permanent magnet synchronous motor servo system[J]. Electric Power Engineering Technology, 2020, 39(6): 177-183. [4] Wang Tao, Guo L L, Wang K, et al.Generalized predictive current control for dual-three-phase PMSM to achieve torque enhancement through harmonic injection[J]. IEEE Transactions on Power Electronics, 2023, 39(5): 6422-6433. [5] Takahashi I, Ohmori Y.High-performance direct torque control of an induction motor[J]. IEEE Transa-ctions on Industry Applications, 1989, 25(2): 257-264. [6] 陈文汉, 孙丹, 王铭泽. 断相故障下开绕组永磁同步电机模型预测控制容错控制策略研究[J]. 电工技术学报, 2021, 36(1): 77-86. Chen Wenhan, Sun Dan, Wang Mingze.Research on fault-tolerance strategy based on model predictive control for open-winding PMSM system under open-phase fault[J]. Transactions of China Electrotechnical Society, 2021, 36(1): 77-86. [7] Wei Yongqing, Qiao Mingzhong, Zhu Peng.Fault-tolerant operation of five-phase permanent magnet synchronous motor with independent phase driving control[J]. CES Transactions on Electrical Machines and Systems, 2022, 6(1): 105-110. [8] 孙丹, 林斌, 周文志. 开绕组电机系统拓扑及控制技术研究综述[J]. 电工技术学报, 2017, 32(4): 76-84. Sun Dan, Lin Bin, Zhou Wenzhi.An overview of open winding electric machine system topology and control technology[J]. Transactions of China Electro-technical Society, 2017, 32(4): 76-84. [9] 张晓光, 闫康, 张文涵. 开绕组永磁同步电机混合双矢量模型预测控制[J]. 电工技术学报, 2021, 36(1): 96-106. Zhang Xiaoguang, Yan Kang, Zhang Wenhan.Hybrid double vector model predictive control for open-winding permanent magnet synchronous motor with common DC bus[J]. Transactions of China Electro-technical Society, 2021, 36(1): 96-106. [10] Rovere L, Valente G, Formentini A, et al.Parameters and volt-ampere ratings of a floating capacitor open-end winding synchronous motor drive for extended CPSR[J]. IEEE Transactions on Industrial Electronics, 2022, 69(5): 4576-4586. [11] 冯子木, 孙国强, 滕德红, 等. 永磁直驱风电机组低电压穿越研究综述[J]. 电力工程技术, 2021, 40(2): 75-85. Feng Zimu, Sun Guoqiang, Teng Dehong, et al.Reviews of LVRT technology for D-PMSG[J]. Electric Power Engineering Technology, 2021, 40(2): 75-85. [12] 陆道荣, 魏缪宇, 于宇, 等. 一种基于方波注入的星形级联静止同步补偿器的负序电流补偿策略[J]. 电工技术学报, 2022, 37(6): 1482-1494. Lu Daorong, Wei Miaoyu, Yu Yu, et al.Zero-sequence-voltage injection based on square-wave to balance cluster voltages for star-connected cascaded STATCOM[J]. Transactions of China Electrotech-nical Society, 2022, 37(6): 1482-1494. [13] 丘冠新, 朱鹏宇, 王灿, 等. 负载不平衡条件下MMC-STATCOM补偿策略研究[J]. 电力工程技术, 2020, 39(2): 35-42. Qiu Guanxin, Zhu Pengyu, Wang Can, et al.The compensation method of MMC-STATCOM under unbalanced load condition[J]. Electric Power Engin-eering Technology, 2020, 39(2): 35-42. [14] Kim J, Jung J, Nam K.Dual-inverter control strategy for high-speed operation of EV induction motors[J]. IEEE Transactions on Industrial Electronics, 2004, 51(2): 312-320. [15] Amerise A, Rovere L, Formentini A, et al.Electric drive based on an open-end winding surface PM synchronous machine with a floating capacitor bridge[J]. IEEE Transactions on Industry Appli-cations, 2020, 56(3): 2709-2718. [16] Lin Bin, Sun Dan, Chen Yin.Research on high-speed operation of hybrid-inverter fed open winding per-manent magnet synchronous motor[C]//International Conference on Electrical Machines and Systems (ICEMS), Busan, 2014: 1179-1183. [17] Ewanchuk J, Salmon J, Chapelsky C.A method for supply voltage boosting in an open-ended induction machine using a dual inverter system with a floating capacitor bridge[J]. IEEE Transactions on Power Electronics, 2013, 28(3): 1348-1357. [18] Sun Dan, Zheng Zhihao, Lin Bin, et al.A hybrid PWM-based field weakening strategy for a hybrid-inverter-driven open-winding PMSM system[J]. IEEE Transactions on Energy Conversion, 2017, 32(3): 857-865. [19] Pan Di, Liang Feng, Wang Yang, et al.Extension of the operating region of an IPM motor utilizing series compensation[J]. IEEE Transactions on Industry Applications, 2014, 50(1): 539-548. [20] Lee Y, Ha J I.Hybrid modulation of dual inverter for open-end permanent magnet synchronous motor[J]. IEEE Transactions on Power Electronics, 2015, 30(6): 3286-3299. [21] Bolognani S, Zigliotto M.Novel digital continuous control of SVM inverters in the overmodulation range[J]. IEEE Transactions on Industry Applications, 1997, 33(2): 525-530. [22] Holtz J, Lotzkat W, Khambadkone A.On continuous control of PWM inverters in the overmodulation range including the six-step mode[J]. IEEE Transa-ctions on Power Electronics, 1993, 8(4): 546-553. [23] 张立伟, 刘钧, 温旭辉, 等. 基于基波电压幅值线性输出控制的SVPWM过调制新算法[J]. 中国电机工程学报, 2005, 25(19): 12-18. Zhang Liwei, Liu Jun, Wen Xuhui, et al.A novel algorithm of SVPWM inverter in the overmodulation region based on fundamental voltage amplitude linear output control[J]. Proceedings of the CSEE, 2005, 25(19): 12-18. [24] Lee D C, Lee G M.A novel overmodulation technique for space-vector PWM inverters[J]. IEEE Transa-ctions on Power Electronics, 1998, 13(6): 1144-1151. [25] Sun Kai, Wei Qing, Huang Lipei, et al.An over-modulation method for PWM-inverter-fed IPMSM drive with single current sensor[J]. IEEE Transactions on Industrial Electronics, 2010, 57(10): 3395-3404. [26] Wang Gaolin, Hu Haiming, Ding Dawei, et al.Over-modulation strategy for electrolytic capacitorless PMSM drives: voltage distortion analysis and boundary optimization[J]. IEEE Transactions on Power Electronics, 2020, 35(9): 9574-9585. [27] 王顺, 杨淑英, 李一, 等. 共中线开绕组拓扑三维空间矢量脉宽调制策略研究[J]. 中国电机工程学报, 2023, 43(3): 1163-1176. Wang Shun, Yang Shuying, Li Yi, et al.Study on three-dimensional space-vector pulse-width modu-lation strategy used for open-end winding topology with common mode connected DC buses[J]. Pro-ceedings of the CSEE, 2023, 43(3): 1163-1176.
2023, Vol. 38 
