- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHANG Wenbai, LIN Guobin, KANG Jinsong, ZHAO Yuanzhe, LIAO Zhiming. Sensorless Control Method of High-Frequency Injection for Long-Stator Synchronous Motor of Maglev Trains Considering Phase Shift Compensation[J]. Journal of Southwest Jiaotong University, 2025, 60(4): 1032-1041. doi: 10.3969/j.issn.0258-2724.20240310
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In order to study the influence of high-frequency signal injection (HFSI) response to electrical angle phase shift on the low-speed control accuracy of maglev trains, the constraint relationship between the control delay and the sampling delay on the angular error lag was considered, and a compensation method for minimizing the angle error of sensorless estimation was proposed. Firstly, a zero-low-speed HFSI model for long-stator synchronous motor (LSM) of high-speed maglev trains was established, and a high-frequency response current model was constructed by using the estimation-real-delay coordinate transformation theory. Secondly, by analyzing the influence of system delay on angular error in a high-power electric drive system, the high-frequency response current model with estimated angular phase shift error was reconstructed. Then, the objective function for the discrete estimation of the angular error was designed, and the bisection method considering the gradient change was proposed to calculate system delay and angular error online. Finally, the algorithm was verified by the low-speed test platform of maglev motors. The experimental results show that compared with the uncompensated sensorless control, when the set current is 20, 21 A, and 22 A, the estimated angular error is decreased by 73.3%, 70.4%, and 72.1% by the proposed compensation method considering phase shift lag compensation. When the set speed is 0.8 m/s, 0.9 m/s, and 1.0 m/s, the estimated angular error is decreased by 67.9%, 70.5%, and 75.5%, and the speed tracking error is decreased by 50% on average.
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Figures(11) / Tables(3)
ZHANG Wenbai, LIN Guobin, KANG Jinsong, ZHAO Yuanzhe, LIAO Zhiming. Sensorless Control Method of High-Frequency Injection for Long-Stator Synchronous Motor of Maglev Trains Considering Phase Shift Compensation[J]. Journal of Southwest Jiaotong University, 2025, 60(4): 1032-1041. doi: 10.3969/j.issn.0258-2724.20240310
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