低开关频率下多相感应电机全阶观测器离散化方法研究

doi:10.19595/j.cnki.1000-6753.tces.240819

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Abstract The multi-phase open-winding induction motor and its adaptive H-bridge multi-phase inverter system have received extensive attention due to their advantages of small torque ripple, strong fault tolerance, and easy power capacity expansion. This paper analyzes the modeling of the multi-phase open-winding motor system and speed sensorless control technology to achieve high degrees of freedom control and low switching frequency characteristics in a twelve-phase, large-capacity, open-winding motor system. The simulation and experimental verification are conducted to enhance the operating performance of the low-switching-frequency multi-phase open-winding motor system.
The twelve-phase open-winding induction motor system and its equivalent three-phase simplified model are established. The equivalent three-phase full-order observer model and its speed estimation method are presented. The full-order observer used in speed sensorless control has the advantages of low control bandwidth requirements and a wide range of observation speeds. However, the switching frequency of the H-bridge large-capacity inverter supporting the ship’s multi-phase open-winding induction motor is low, which inevitably increases the digital discretization error of the full-order observer. This paper derives the full-order flux observer models based on the forward Euler method, the simplified second-order discretization method, and the proposed Adams fourth-order discretization method. Then, the steady-state error and observer stability are compared using the F-norm and pole diagram. Theoretical analysis reveals that the full-order observer, based on Adams' fourth-order discretization method, achieves the best discrete accuracy and stability of the observation system while minimizing the computational complexity of the digital control system.
A simulation model and a test platform for a twelve-phase, 25 kW open-winding induction motor with speed sensorless control have been developed. The results show that, compared with the forward Euler method and the simplified second-order discretization method, the observation results for speed, current, and flux based on the Adams fourth-order discretization method are almost consistent with the actual values. Through the speed sensorless closed-loop speed regulation test and load mutation test, it is further verified that the full-order observer based on Adams' fourth-order discretization method exhibits good speed regulation and load-carrying capacity, which can achieve better dynamic and steady-state performance under both extremely low and high-speed conditions. The full-order observer discretization method can provide technical support for applying speed sensorless control technology to low switching frequency multi-phase open-winding motor systems.

Key words： Multi-phase open-winding induction motor full-order observer discretization algorithm low switching frequency

Received: 19 May 2024

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	Hu Liangdeng
	Guo Cheng
	Xu Xiaosong
	Luo Xiangyu

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Hu Liangdeng,Guo Cheng,Xu Xiaosong等. Research on Full-Order Observer Discretization Method of Multi-Phase Induction Motor at Low Switching Frequency[J]. Transactions of China Electrotechnical Society, 2025, 40(12): 3842-3856.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.240819 OR https://dgjsxb.ces-transaction.com/EN/Y2025/V40/I12/3842

[1] 罗成, 李孺涵, 杨凯, 等. 基于电流优化的无速度传感器感应电机零频穿越策略[J]. 电工技术学报, 2022, 37(19): 4947-4956.
Luo Cheng, Li Ruhan, Yang Kai, et al.Current optimization-based zero frequency ride-through method for speed-sensorless induction motor drives[J]. Transactions of China Electrotechnical Society, 2022, 37(19): 4947-4956.
[2] 孙玉华, 赵文祥, 吉敬华, 等. 高转矩性能多相组永磁电机及其关键技术综述[J]. 电工技术学报, 2023, 38(6): 1403-1420.
Sun Yuhua, Zhao Wenxiang, Ji Jinghua, et al.Overview of multi-star multi-phase permanent magnet machines with high torque performance and its key technologies[J]. Transactions of China Electro-technical Society, 2023, 38(6): 1403-1420.
[3] 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 Elec-trotechnical Society, 2017, 32(4): 76-84.
[4] 杨凯, 李孺涵, 罗成, 等. 负载变化下无传感器感应电机主动零频穿越及脉动抑制策略[J]. 电工技术学报, 2023, 38(18): 4910-4920.
Yang Kai, Li Ruhan, Luo Cheng, et al.Proactive low-frequency ride-through method and its ripple reduction for sensorless induction motor drives under load variations[J]. Transactions of China Electro-technical Society, 2023, 38(18): 4910-4920.
[5] 易山, 卢子广, 袁凯南, 等. 中低频轻载工况下引入虚拟电抗的感应电机变频调速系统稳定控制[J]. 电工技术学报, 2022, 37(8): 1959-1971.
Yi Shan, Lu Ziguang, Yuan Kainan, et al.The stability control of induction motor variable frequency speed regulation system injected with virtual reactance under low frequency and light load condition[J]. Transactions of China Electrotechnical Society, 2022, 37(8): 1959-1971.
[6] Harnefors L, Hinkkanen M.Complete stability of reduced-order and full-order observers for sensorless IM drives[J]. IEEE Transactions on Industrial Elec-tronics, 2008, 55(3): 1319-1329.
[7] 罗慧. 感应电机全阶磁链观测器和转速估算方法研究[D]. 武汉: 华中科技大学, 2009.
Luo Hui.Research on full-order flux observer and speed estimation method of induction motor[D]. Wuhan: Huazhong University of Science and Tech-nology, 2009.
[8] 赵雷廷, 刁利军, 董侃, 等. 基于状态空间拆分重组的牵引异步电机闭环离散全阶转子磁链观测器[J]. 电工技术学报, 2013, 28(10): 103-112.
Zhao Leiting, Diao Lijun, Dong Kan, et al.A novel discretized closed-loop full-order rotor flux observer for induction motor based on re-organization of state space[J]. Transactions of China Electrotechnical Society, 2013, 28(10): 103-112.
[9] 张钦培, 李健, 卢阳, 等. 低载波比牵引系统的感应电机特征根离散化模型研究[J]. 电工技术学报, 2024, 39(2): 434-444, 454.
Zhang Qinpei, Li Jian, Lu Yang, et al.Research on discretization model of induction motor for low switching-to-fundamental frequency ratio traction system[J]. Transactions of China Electrotechnical Society, 2024, 39(2): 434-444, 454.
[10] 李杰, 詹榕, 宋文祥. 感应电机低采样频率的磁链观测器离散化模型研究[J]. 电工技术学报, 2019, 34(15): 3136-3146.
Li Jie, Zhan Rong, Song Wenxiang.Improved discrete observer model of induction motor at low sampling frequency[J]. Transactions of China Electrotechnical Society, 2019, 34(15): 3136-3146.
[11] 沈凤龙, 满永奎, 王建辉. 基于改进全阶状态观测器的异步电机速度估算系统[J]. 微电机, 2019, 52(6): 34-39, 50.
Shen Fenglong, Man Yongkui, Wang Jianhui.Speed estimation system of induction motor based on improved full order observer[J]. Micromotors, 2019, 52(6): 34-39, 50.
[12] 凌光, 王斯然, 陈斌, 等. 感应电机全阶观测器的一种新型离散方法[J]. 电力电子技术, 2012, 46(4): 78-81.
Ling Guang, Wang Siran, Chen Bin, et al.A new discretization method of full-order observer for induction motor[J]. Power Electronics, 2012, 46(4): 78-81.
[13] Wang Bo, Zhao Yongzheng, Yu Yong, et al.Speed-sensorless induction machine control in the field-weakening region using discrete speed-adaptive full-order observer[J]. IEEE Transactions on Power Electronics, 2016, 31(8): 5759-5773.
[14] 宋文祥, 周杰, 尹赟. 感应电机转速自适应全阶磁链观测器的离散化[J]. 上海大学学报(自然科学版), 2012, 18(6): 582-588.
Song Wenxiang, Zhou Jie, Yin Yun.Discretization of speed adaptive full-order flux observer for induction motors[J]. Journal of Shanghai University (Natural Science Edition), 2012, 18(6): 582-588.
[15] 胡亮灯, 肖飞, 楼徐杰, 等. 基于层叠载波调制的三电平H桥变频器输出电压异常跳变分析研究[J]. 中国电机工程学报, 2019, 39(1): 266-276.
Hu Liangdeng, Xiao Fei, Lou Xujie, et al.Research on output voltage abnormal voltage pulses of three-level H-bridge inverter base on cascaded carrier modulation[J]. Proceedings of the CSEE, 2019, 39(1): 266-276.
[16] 邓歆, 张广明, 王德明, 等. 异步电机全阶磁链观测器反馈矩阵设计[J]. 电机与控制学报, 2015, 19(12): 7-17.
Deng Xin, Zhang Guangming, Wang Deming, et al.Feedback matrix design of full order flux observer for induction motor[J]. Electric Machines and Control, 2015, 19(12): 7-17.
[17] 尹少博. 感应电机无速度传感器控制带速重投方法研究[J]. 电气工程学报, 2022, 17(3): 130-137.
Yin Shaobo.Study on the restarting method of induction motor under speed-sensorless control[J]. Journal of Electrical Engineering, 2022, 17(3): 130-137.
[18] 胡锦涛, 邵宜祥, 庄圣伦, 等. 基于新型全阶观测器的感应电机无速度传感器控制[J]. 微电机, 2021, 54(5): 79-85.
Hu Jintao, Shao Yixiang, Zhuang Shenglun, et al.Speed sensorless control of induction motor based on new full-order observer[J]. Micromotors, 2021, 54(5): 79-85.
[19] 徐长发, 王邦. 实用计算方法[M]. 武汉: 华中科技大学出版社, 2005.