基于分数阶全局滑模与Elman神经网络磁链观测的PMSM转矩脉动抑制研究*

doi:10.11985/2023.03.017

摘要/Abstract

摘要：

针对传统直接转矩控制转矩脉动较大的问题，提出一种基于构造分数阶全局滑模控制器和基于Elman神经网络电阻辨识的磁链观测器的PMSM转矩脉动抑制方法。首先，建立了PMSM的数学模型，以磁链和转矩误差建立了分数阶滑模面，设计了分数阶全局滑模控制器；其次，为了通过精确观测磁链来进一步实现转矩脉动的抑制，提出了基于Elman神经网络的电阻辨识方法，然后将辨识结果用于磁链观测器的设计，并与分数阶全局滑模控制器结合，构建了基于分数阶全局滑模与磁链观测的PMSM控制系统，实现对PMSM转矩脉动的抑制。试验结果表明，所提出的基于构造分数阶全局滑模控制器和基于Elman神经网络电阻辨识的磁链观测器相结合的方法可以很好地抑制转矩脉动。

关键词: 永磁同步电机, 分数阶全局滑模控制, 磁链滑模观测器, 转矩脉动抑制, Elman神经网络

Abstract:

To restrain the torque fluctuations of permanent magnet synchronous motor(PMSM), a PMSM torque ripple suppression method is proposed based on the construction of fractional-order global sliding mode controller and flux observer of Elman neural network resistance identification. Firstly, the mathematical model of PMSM is established, the fractional sliding mode surface was established based on the flux and torque error, and a fractional global sliding mode controller is designed. Secondly, in order to further suppress the torque ripple by observing the flux linkage accurately, a resistance identification method of Elman neural network is proposed. Then, the identification results were used to design the flux observer, and combined with the fractional-order global sliding mode controller, a PMSM control system based on fractional-order global sliding mode and flux observation is constructed. It can suppress the torque ripple of PMSM. Experimental results show that the proposed method, which is based on the construction of fractional global sliding mode controller and the flux observer based on Elman neural network resistance identification, can suppress the torque ripple well.

Key words: Permanent magnet synchronous motor(PMSM), fractional order global sliding mode controller, flux sliding mode observer, torque ripple suppression, Elman neural network

中图分类号:

TM341

张荣芸, 王朕, 时培成, 赵林峰, 刘亚铭, 张斌. 基于分数阶全局滑模与Elman神经网络磁链观测的PMSM转矩脉动抑制研究^*[J]. 电气工程学报, 2023, 18(3): 154-163.

ZHANG Rongyun, WANG Zhen, SHI Peicheng, ZHAO Linfeng, LIU Yaming, ZHANG Bin. Research on Torque Ripple Suppression of PMSM Based on Fractional Global Sliding Mode and Flux Observation[J]. Journal of Electrical Engineering, 2023, 18(3): 154-163.

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参数	数值
电压/V	380
频率/Hz	50
定子电阻/Ω	1.2
定子电感/H	0.02
转子磁链/Wb	0.06
极对数	2
功率/kW	0.2
额定电流/A	7.5
额定电压/V	36
转动惯量/(kg·m²)	0.000 8