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An Improved Adaptive Full-Order Sliding-Mode Observer for Sensorless Control of High-Speed Permanent-Magnet Synchronous Motor

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Abstract

The development of advanced sensorless control of high-speed permanent-magnet synchronous motor (PMSM) has been an ever-increasing demand in modern drive fields. Herein, in this article, an improved adaptive full-order sliding-mode observer (FSMO) for sensorless control of high-speed PMSM is proposed to improve the estimation accuracy of rotor speed and position. A model-referenced adaptive electrical angular velocity & back electromotive force (back EMF) observer is established. The estimated electrical angular velocity is directly fed back to the FSMO, which highly reduces the noise in the FSMO & phase-locked loop (PLL) system and weakens the chattering of the back EMF waveform, so that the estimation accuracy of the PLL on rotor speed and position is significantly improved. Simulations and experiments compared with the conventional method are both carried out with a 3 kW high-speed PMSM. The experimental results demonstrate that the proposed FSMO has preferable speed and position estimation capabilities under various operating conditions, which verifies the feasibility and superiority of the proposed method.

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Abbreviations

E α,E β :

Back EMF on α-β axis

i d,i q :

Stator current on d-q axis

i α,i β :

Stator current on α-β axis

L d,L q :

Inductance on d-q axis

L s :

Stator inductance

R s :

Stator resistance

u d , u q :

Stator voltage on d-q axis

u α,u β :

Stator voltage on α-β axis

θ e :

Electrical rotor position

ψ f :

Flux linkage of permanent magnet

ω e :

Electrical angular speed

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Acknowledgements

This work was supported by National Nature Science Foundation of China, NO. 52075239 and the Fundamental Research Funds for the Central Universities, NO. NP2022411.

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Authors and Affiliations

  1. College of Mechanical & Electrical Engineering, Nanjing Univerity of Aeronautics and Astronautics, Nanjing, China

    Runhui Yao, Jin Zhou, Jinwei Shi, Yangyi Ling & Qiqi Jiang

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  1. Runhui Yao
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  2. Jin Zhou
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  3. Jinwei Shi
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  4. Yangyi Ling
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Correspondence to Runhui Yao or Jin Zhou.

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Yao, R., Zhou, J., Shi, J. et al. An Improved Adaptive Full-Order Sliding-Mode Observer for Sensorless Control of High-Speed Permanent-Magnet Synchronous Motor. J. Electr. Eng. Technol. 19, 1579–1591 (2024). https://doi.org/10.1007/s42835-023-01665-y

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