Abstract：The maximum output torque (MT) and the minimum stator copper loss (ML) are two common optimization objectives in the fault-tolerant operation of multi-phase motors, and the existing fault-tolerant control schemes mostly choose between MT and ML, which is difficult to take into account at the same time. In this paper, a strategy considering MT and ML synchronously is proposed for nine-phase permanent magnet synchronous motors (PMSM) with open-circuited faults of one or two phases. First, the maximum output torque range of the faulty motor is calculated under MT. Then, the stator copper loss is optimized under different load conditions by ML. Hence, the optimal copper loss control is realized for the nine-phase PMSM fault-tolerant operation in maximum torque range. Finally, a series of 9kW nine-phase PMSM fault-tolerance control experiments are performed to verify the validity of the proposed strategy.
[1] 马伟明, 王东, 程思为, 等. 高性能电机系统的共性基础科学问题与技术发展前沿[J]. 中国电机工程学报, 2016, 36(8): 2025-2035. Ma Weiming, Wang Dong, Cheng Siwei, et al.Common basic scientific problems and development of leading-edge technology of high performance motor system[J]. Proceedings of the CSEE, 2016, 36(8): 2025-2035. [2] 刘自程, 李永东, 郑泽东. 多相电机控制驱动技术研究综述[J]. 电工技术学报, 2017, 32(24): 17-29. Liu Zicheng, Li Yongdong, Zheng Zedong.Control and drive techniques for multiphase machines: a review[J]. Transactions of China Electrotechnical Society, 2017, 32(24): 17-29. [3] 魏永清, 康军, 曾海燕, 等. 十二相永磁电机驱动系统的容错控制策略[J]. 电工技术学报, 2019, 34(21): 4467-4473. Wei Yongqing, Kang Jun, Zeng Haiyan, et al.Fault-tolerant control strategy for twelve-phase permanent magnet synchronous motor propulsion system[J]. Transactions of China Electrotechnical Society, 2019, 34(21): 4467-4473. [4] 郑晓钦, 王东, 刘海涛, 等. 十五相感应推进电机切套减额运行转矩计算[J]. 电工技术学报, 2019, 34(1): 58-65. Zheng Xiaoqin, Wang Dong, Liu Haitao, et al.Torque calculation of fifteen-phase induction motor with different sets of winding derated operation[J]. Transactions of China Electrotechnical Society, 2019, 34(1): 58-65. [5] 刘国海, 高猛虎, 周华伟, 等. 五相永磁同步电机磁链改进型容错直接转矩控制[J]. 中国电机工程学报, 2019, 39(2): 359-365, 633. Liu Guohai, Gao Menghu, Zhou Huawei, et al.Flux-modification-based fault-tolerant DTC for five-phase PMSM[J]. Proceedings of the CSEE, 2019, 39(2): 359-365, 633. [6] 陈浩, 和阳, 赵文祥, 等. 基于占空比调制的五相容错永磁游标电机直接转矩控制[J]. 电工技术学报, 2020, 35(5): 1055-1064. Chen Hao, He Yang, Zhao Wenxiang, et al.Direct torque control of five-phase fault-tolerant permanent magnet vernier motor based on duty cycle modulation[J]. Transactions of China Electrotechnical Society, 2020, 35(5): 1055-1064. [7] Zheng Xiaoqin, Ma Weiming, Wang Dong.Steady-state performance analysis of 15-phase induction machines under open-circuited fault conditions[J]. 中国电机工程学报, 2018, 38(5): 1542-1552. Zheng Xiaoqin, Ma Weiming, Wang Dong.Steady-state performance analysis of 15-phase induction machines under open-circuited fault conditions[J]. Proceedings of the CSEE, 2018, 38(5): 1542-1552. [8] 彭忠, 郑泽东, 刘自程, 等. 基于虚拟绕组和全阶观测器的五相感应电机无速度传感器容错控制策略[J]. 电工技术学报, 2018, 33(21): 4949-4961. Peng Zhong, Zheng Zedong, Liu Zicheng, et al.A novel sensorless fault-tolerant control of five-phase induction machine using virtual winding and full-order observer[J]. Transactions of China Electrotechnical Society, 2018, 33(21): 4949-4961. [9] 郑晓钦, 马伟明, 王东, 等. 十五相感应电机不对称缺相容错运行控制[J]. 中国电机工程学报, 2018, 38(4): 1212-1221, 1298. Zheng Xiaoqin, Ma Weiming, Wang Dong, et al.Fault-tolerant control of fifteen-phase induction machine under asymmetrical fault condition[J]. Proceedings of the CSEE, 2018, 38(4): 1212-1221, 1298. [10] 林晓刚, 黄文新, 姜文, 等. 共母线开绕组永磁同步电机缺相容错型直接转矩控制[J]. 电工技术学报, 2020, 35(24): 5064-5074. Lin Xiaogang, Huang Wenxin, Jiang Wen, et al.Fault-tolerant direct torque control for open-end winding permanent magnet synchronous motor with common DC bus under open phase circuit[J]. Transactions of China Electrotechnical Society, 2020, 35(24): 5064-5074. [11] 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. [12] 刘海涛, 王东, 易新强, 等. 适用于多种缺相故障的十五相感应电机统一容错控制[J]. 中国电机工程学报, 2019, 39(2): 327-336, 630. Liu Haitao, Wang Dong, Yi Xinqiang, et al.A unified fault-tolerant control for 15-phase induction machine under various phase failure conditions[J]. Proceedings of the CSEE, 2019, 39(2): 327-336, 630. [13] Munim W N W A, Duran M J, Che Hang seng, et al. A unified analysis of the fault tolerance capability in six-phase induction motor drives[J]. IEEE Transactions on Power Electronics, 2017, 32(10): 7824-7836. [14] Baneira F, Doval-Gandoy J, Yepes A G, et al.Control strategy for multiphase drives with minimum losses in the full torque operation range under single open-phase fault[J]. IEEE Transactions on Power Electronics, 2017, 32(8): 6275-6285. [15] 周长攀, 杨贵杰, 苏健勇, 等. 基于正常解耦变换的双三相永磁同步电机缺相容错控制策略[J]. 电工技术学报, 2017, 32(3): 86-96. Zhou Changpan, Yang Guijie, Su Jianyong, et al.The control strategy for dual three-phase PMSM based on normal decoupling transformation under fault condition due to open phases[J]. Transactions of China Electrotechnical Society, 2017, 32(3): 86-96. [16] Yepes A G, Doval-Gandoy J, Baneira F, et al.Control strategy for dual three-phase machines with two open phases providing minimum loss in the full torque operation range[J]. IEEE Transactions on Power Electronics, 2018, 33(12): 10044-10050. [17] Che Hang seng, Duran M J, Levi E, et al. Postfault operation of an asymmetrical six-phase induction machine with single and two isolated neutral points[J]. IEEE Transactions on Power Electronics, 2014, 29(10): 5406-5416. [18] 刘海涛, 易新强, 王东, 等. 五相感应电机缺相容错运行的全转矩范围效率优化控制策略[J]. 中国电机工程学报, 2020, 40(5): 1642-1653. Liu Haitao, Yi Xinqiang, Wang Dong, et al.An efficiency-optimized control strategy in the full torque operation range for five-phase induction motor under open-circuited fault conditions[J]. Proceedings of the CSEE, 2020, 40(5): 1642-1653. [19] Sun Jiawei, Liu Zicheng, Zheng Zedong, et al.An online global fault-tolerant control strategy for symmetrical multiphase machines with minimum losses in full torque production range[J]. IEEE Transactions on Power Electronics, 2020, 35(3): 2819-2830.
2022, Vol. 37 
