基于一阶线性自抗扰控制器的同步磁阻电机无速度传感器控制

doi:10.19595/j.cnki.1000-6753.tces.230967

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Abstract Synchronous Reluctance Motor (SynRM) is widely used in air compressors, fans, and electric vehicles because of its wide speed range, strong overload capacity, low cost, high reliability, and insensitive temperature rise during operation. To ensure the control accuracy of position and speed, installing a position sensor is necessary for position and speed measurement of the rotor, which makes the motor occupy a large volume, the cost is high, reliability is low, and immunity is weak. Therefore, taking the synchronous reluctance motor as the research object, this paper studies its speed sensorless control strategy to enhance system immunity.
A speed sensor-free control strategy based on a magnetic chain observer is studied. However, the cross-coupling effect exists during the operation of SynRM, which causes the inductance to change nonlinearly with the current, reducing the accuracy of the rotor position estimated by the flux observer. Voltage with different amplitudes and frequencies is injected into the d-q axis by the static experiment. The forward Euler method is used to calculate the d-q axis magnetic chain. The linear least square method fits the non-linear function model of the d-q axis magnetic chain and current. Finally, the function model is applied to the magnetic chain observer to improve the rotor speed and position estimation accuracy.
A speed sensorless controller strategy for SynRM based on auto-disturbance rejection technology is studied to overcome weak immunity and low robustness. Firstly, the design principle of the ADRC is analyzed, and an ADRC suitable for SynRM is selected. According to the SynRM mechanical motion state equation, load variation is regarded as a total disturbance, and the disturbance is quickly observed and compensated. In view of the disadvantage of extensive parameters and complex adjustment in ADRC, a linear function is used instead of the original nonlinear function, which improves the robustness of the system.
Finally, a Matlab/Simulink simulation model of speed sensorless control strategy for the synchronous reluctance motor is built based on auto-disturbance rejection technology. The nonlinear function model of d-q axis flux and d-q axis current considering the cross-coupling effect is established and applied to the flux closed-loop observer method, improving the rotor position estimation accuracy. At the same time, a first-order linear active disturbance rejection controller is designed to improve the speed loop. The disturbance is compensated in time while observing the motor motion state, and the problems of overshoot, slow response speed, and slow speed recovery time when the motor is perturbed are solved.

Key words： Synchronous reluctance motor flux observer first order linear active disturbance rejection controller cross-coupled speed sensorless control

Received: 23 June 2023

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TM352

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	Wang Jianyuan
	Wang Haixiao
	Yin Zhonggang
	Li Yingjie
	Jing Hanghui

Cite this article:

Wang Jianyuan,Wang Haixiao,Yin Zhonggang等. Sensorless Control of Synchronous Reluctance Motor Based on First Order Linear Active Disturbance Rejection Controller[J]. Transactions of China Electrotechnical Society, 2024, 39(14): 4405-4421.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.230967 OR https://dgjsxb.ces-transaction.com/EN/Y2024/V39/I14/4405

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