An Improved UDE-Based Flux-Weakening Control Strategy for IPMSM

Xin Gu, Tao Li, Xinmin Li, Guozheng Zhang and Zhiqiang Wang
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Xin Gu: School of Electrical Engineering and Automation, Tiangong University, Tianjin 300387, China
Tao Li: School of Electrical Engineering and Automation, Tiangong University, Tianjin 300387, China
Xinmin Li: School of Electrical Engineering and Automation, Tiangong University, Tianjin 300387, China
Guozheng Zhang: School of Electrical Engineering and Automation, Tiangong University, Tianjin 300387, China
Zhiqiang Wang: School of Artificial Intelligence, Tiangong University, Tianjin 300387, China

Energies, 2019, vol. 12, issue 21, 1-17

Abstract: Interior permanent magnet synchronous motors (IPMSMs) are usually used in electric vehicle drives and in other applications. In order to enlarge the speed range of IPMSMs, the flux-weakening control method is adopted. The traditional flux-weakening control strategy degrades the control performance because of parameter mismatches caused by variation of motor parameters. An improved uncertainty and disturbance estimator (UDE)-based flux-weakening control strategy is proposed for IPMSM drives in this paper. The parameter tuning method in the UDE-based control is improved. In addition, a flux-weakening adjusting factor is put forward to reduce the torque fluctuation when the operation point switches between the constant torque region and the flux-weakening region. This factor can be adjusted online by a lookup table. Finally, the validity of proposed method is verified by the simulation and experimental results. The results show that the proposed control strategy can effectively enhance the robustness of the system in the flux-weakening region, and make the system switch more smoothly between the constant torque region and the flux-weakening region.

Keywords: IPMSM; uncertainty and disturbance estimator; flux-weakening control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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