volume | PIER Journals

Abstract

In a permanent magnet synchronous machine (PMSM) system, the voltage mode-based rotor flux observer suffers from DC drift, primarily due to measurement errors, parameter variations, and non-zero initial states. To address this issue, the second-order flux observer (SOFO) is utilized, equipped with filtering capability aimed at reducing harmonic components. However, the DC offset induced by external disturbances cannot be completely eliminated by the second-order transfer function alone. Traditional magnetic flux correctors typically update correction values only at zero-crossing points of the magnetic flux. In this study, we propose an improved orthogonal flux corrector (IOFC) that combines a generalized integrator to effectively filter out the DC offset. In comparison with traditional OFC methods, our approach involves reconstructing two magnetic linkage functions, thereby doubling the correction frequency within a single cycle. Consequently, the frequency of correction term updates is threefold compared to conventional OFC methods. Finally, IOFC is implemented and tested on a PMSM platform for experimental verification.

1. Liu, Xin, Yanfei Pan, Yilin Zhu, Hui Han, and Lei Ji, "Decoupling control of permanent magnet synchronous motor based on parameter identification of fuzzy least square method," Progress In Electromagnetics Research M, Vol. 103, 49-60, 2021. Google Scholar

2. Jiang, Yajie, Wei Xu, Chaoxu Mu, Jianguo Zhu, and Renjun Dian, "An improved third-order generalized integral flux observer for sensorless drive of PMSMs," IEEE Transactions on Industrial Electronics, Vol. 66, No. 12, 9149-9160, Dec. 2019. Google Scholar

3. Pan, Yanfei, Xin Liu, Yilin Zhu, and Zhongshu Li, "A leading angle flux weakening control method for PMSM based on active disturbance rejection control," Progress In Electromagnetics Research C, Vol. 121, 29-38, 2022. Google Scholar

4. Jiang, Yajie, Wei Xu, Chaoxu Mu, and Yi Liu, "Improved deadbeat predictive current control combined sliding mode strategy for PMSM drive system," IEEE Transactions on Vehicular Technology, Vol. 67, No. 1, 251-263, Jan. 2018. Google Scholar

5. Ni, Ronggang, Dianguo Xu, Frede Blaabjerg, Kaiyuan Lu, Gaolin Wang, and Guoqiang Zhang, "Square-wave voltage injection algorithm for PMSM position sensorless control with high robustness to voltage errors," IEEE Transactions on Power Electronics, Vol. 32, No. 7, 5425-5437, Jul. 2017. Google Scholar

6. Kim, Hongryel, Jubum Son, and Jangmyung Lee, "A high-speed sliding-mode observer for the sensorless speed control of a PMSM," IEEE Transactions on Industrial Electronics, Vol. 58, No. 9, 4069-4077, Sep. 2011. Google Scholar

7. Park, Yongsoon and Seung-Ki Sul, "Sensorless control method for PMSM based on frequency-adaptive disturbance observer," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 2, No. 2, 143-151, Jun. 2014. Google Scholar

8. Dian, Renjun, Junhe Zhang, and Yajie Jiang, "Improved MOGIFO-based flux observation strategy for PMSM sensorless drives," IEEE Access, Vol. 12, 28475-28483, Feb. 2024. Google Scholar

9. Bobtsov, Alexey A., Anton A. Pyrkin, Romeo Ortega, Slobodan N. Vukosavic, Aleksandar M. Stankovic, and Elena V. Panteley, "A robust globally convergent position observer for the permanent magnet synchronous motor," Automatica, Vol. 61, 47-54, Nov. 2015. Google Scholar

10. Wu, Chao, Xiangdong Sun, and Jianyuan Wang, "A rotor flux observer of permanent magnet synchronous motors with adaptive flux compensation," IEEE Transactions on Energy Conversion, Vol. 34, No. 4, 2106-2117, Dec. 2019. Google Scholar

11. Yu, Baiqiang, Anwen Shen, Bao Chen, Xin Luo, Qipeng Tang, Jinbang Xu, and Mingfu Zhu, "A compensation strategy of flux linkage observer in SPMSM sensorless drives based on linear extended state observer," IEEE Transactions on Energy Conversion, Vol. 37, No. 2, 824-831, Jun. 2022. Google Scholar

12. Zhao, Meiling, Guohai Liu, Qian Chen, Zhengmeng Liu, Xuhui Zhu, and Christopher H. T. Lee, "Effective position error compensation in sensorless control based on unified model of SPMSM and IPMSM," IEEE Transactions on Industrial Informatics, Vol. 19, No. 5, 6750-6761, May 2023. Google Scholar

13. Wang, Siqi, Dawei Ding, Guoqiang Zhang, Binxing Li, Qiwei Wang, Gaolin Wang, and Dianguo Xu, "Flux observer based on enhanced second-order generalized integrator with limit cycle oscillator for sensorless PMSM drives," IEEE Transactions on Power Electronics, Vol. 38, No. 12, 15982-15995, Dec. 2023. Google Scholar

14. Wu, Shuaihu, Chuxiong Hu, Ziyan Zhao, and Yu Zhu, "High accuracy sensorless control of permanent magnet linear synchronous motors for variable speed trajectories," IEEE Transactions on Industrial Electronics, Vol. 71, No. 5, 4396-4406, May 2024. Google Scholar

Dr. Siyuan Cheng

Dr. Haoze Wang

Dr. Yajie Jiang