SENSORLESS CONTROL OPTIMIZATION OF PERMANENT MAGNET SYNCHRONOUS MOTOR FOR NEW ENERGY GRAVITY ENERGY STORAGE SYSTEM

Zhu Xinkai; Yao Yuanfan; Liu Yabin; Li Jianwen; Wu Yucai; Zhang Yongchang

doi:10.19912/j.0254-0096.tynxb.2024-0902

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (9) : 351-361. DOI: 10.19912/j.0254-0096.tynxb.2024-0902

SENSORLESS CONTROL OPTIMIZATION OF PERMANENT MAGNET SYNCHRONOUS MOTOR FOR NEW ENERGY GRAVITY ENERGY STORAGE SYSTEM

Zhu Xinkai¹, Yao Yuanfan¹, Liu Yabin¹, Li Jianwen¹, Wu Yucai¹, Zhang Yongchang²

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Abstract

In order to solve the problems of system chattering, low estimation accuracy and poor anti-disturbance ability caused by the discontinuity of the symbol function of the traditional sliding mode observer, a new type of switching function is constructed, and then an improved sliding mode observer is designed to estimate the rotor position and improve the estimation accuracy, which is verified by the Lyapunov stability theory. It is equipped with a load disturbance observer to estimate the load torque in real time and compensate for the speed drop caused by external disturbance. Finally, the improved second-order generalized integrator notch phase-locked loop is used to calculate the rotor position. Through the comparison between simulation and experiment, the improved control strategy proposed in this paper can effectively improve the extended back EMF waveform, improve the accuracy of rotor position estimation, the speed fluctuation of the synchronous motor-generator is less than 1%, which has the advantages of the small speed drop after sudden disturbance, the high robustness and the high operation efficiency of the gravity energy storage system.

Key words

new energy / gravity energy storage / sensorless control / permanent magnet synchronous motor-generator / sliding mode observer / load disturbance observer

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Zhu Xinkai, Yao Yuanfan, Liu Yabin, Li Jianwen, Wu Yucai, Zhang Yongchang. SENSORLESS CONTROL OPTIMIZATION OF PERMANENT MAGNET SYNCHRONOUS MOTOR FOR NEW ENERGY GRAVITY ENERGY STORAGE SYSTEM[J]. Acta Energiae Solaris Sinica. 2025, 46(9): 351-361 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0902

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