基于混合多谐振三阶广义积分型磁链观测器的PMSM无位置传感器控制

doi:10.19595/j.cnki.1000-6753.tces.242178

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Abstract Sensorless control of permanent magnet synchronous motors (PMSMs) requires real-time acquisition of high-precision magnetic flux information. The flux observer can determine the rotor magnetic flux position and angle by integrating the back electromotive force (EMF). However, it exhibits DC bias and low-order harmonics at low-speed range, which degrade estimation accuracy and increase the risk of instability. Thus, this paper proposes a mixed multi-resonant third-order generalized integral flux observer (MRTOGIFO). Firstly, the theoretical analysis was conducted on the suppression performance of DC bias and low-order harmonics between traditional magnetic flux observers, second-order generalized integral magnetic flux observers (SOGIFO), and third-order generalized integral magnetic flux observers (TOGIFO). Secondly, the notch circuit of the third-order generalized integrator (TOGI) is used to extract the DC bias, and a complex-coefficient resonant unit is proposed to separate low-order harmonic interference. A cross-feedback network is designed to eliminate the DC bias and low-order harmonic interference from the observed signal. Therefore, the real information of the rotor flux is obtained, and the accuracy of the flux observer is improved. Moreover, the block diagram and the transfer function of the MRTOGIFO are presented, and the influence of the proposed flux observer on signals such as DC bias, fundamental wave, and low-order harmonics is analyzed in the frequency domain. It has been shown that the MRTOGIFO weakens the resonance peak of TOGI at low frequencies and improves dynamic performance. Finally, an 800 W PMSM experimental platform is built to compare the steady-state accuracy and dynamic performance of different flux observers in the low-speed range. The experimental results validated that the proposed strategy has a wider speed range and higher observing accuracy.

Key words： Permanent magnet synchronous motor (PMSM) sensorless control field-oriented control flux estimation flux observers

Received: 03 December 2024

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TM614

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	Fang Wei
	Wang Leiyu
	Zhou Mi
	Shi Qingping
	Liu Xiaodong

Cite this article:

Fang Wei,Wang Leiyu,Zhou Mi等. Position Sensorless Control System Design Based on Mix-Multi-Resonant Third-Order Generalized Integral Flux Observer for PMSM[J]. Transactions of China Electrotechnical Society, 2026, 41(4): 1210-1222.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.242178 OR https://dgjsxb.ces-transaction.com/EN/Y2026/V41/I4/1210

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