带有LC正弦波滤波器的内置式永磁同步电机电流控制器谐振抑制参数设计

doi:10.19595/j.cnki.1000-6753.tces.221734

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Abstract An interior permanent magnet synchronous motor (IPMSM) is usually powered by a voltage source inverter (VSI). The fast switching action of power switching devices leads to a large voltage change rate (du/dt), which brings about adverse effects that cannot be ignored, such as the increase of insulation stress of the motor, the induction of shaft voltage and shaft current, and the generation of prominent electromagnetic interference. In some particular industrial application scenarios, such as marine surveys, oil field drilling, and mining, the VSI installation location is far away from the IPMSM, and the “long-line effect” makes such adverse effects more prominent. LC sinusoidal filter can convert VSI output voltage into a sine wave, which applies to any cable length and can effectively solve the above problems. However, adding an LC sine wave filter increases the order of the system model. It will produce an inherent resonance phenomenon in the current loop, which poses a challenge to the current controller design of IPMSM.
With the flux-oriented control, resonance suppression can be achieved theoretically by introducing active damping (AD) into the current controller. When the AD is introduced into the IPMSM current controller with an LC sinusoidal filter, the setting of proportional-integral (PI) control parameters and AD coefficient used in the current loop is critical to the stability of the system. However, there are few research results on the resonance suppression parameter design of AC motor current controllers with LC sinusoidal filters. The PI controller parameters, AD coefficient, IPMSM parameters, and LC sinusoidal filter parameters are coupled. If the controller parameters are set unreasonably, the resonance phenomenon of the system will not be effectively suppressed, which will lead to high voltage and current in the drive system and bring great risks to the operation of the system.
In order to obtain a satisfactory resonance suppression effect and guarantee the control performance of the IPMSM with an LC sinusoidal filter, the parameters of the current controller must be reasonably designed. This paper studies the design method of resonance suppression parameters of the current controller for IPMSM with an LC sinusoidal filter and analyzes the frequency characteristics of the current controller with capacitor- current- feedback AD (CCFAD). In addition, the influence mechanism of the current proportional integral regulator, AD coefficient, LC filter parameters, and motor parameters on the system resonance phenomenon is analyzed through the stability criterion in the frequency domain. The design method of resonance suppression parameters of the current controller is accordingly given by the mathematical models in the s and zdomains. The experimental results show that using the proposed parameter design method, the IPMSM drive system can obtain excellent steady-state and dynamic performance.
The paper is organized as follows. The mathematical model of the IPMSM with LC sinusoidal filter is given, the resonance phenomenon and resonance suppression strategy based on CCFAD are analyzed, and the design method of the resonance suppression parameters of the current controller is proposed.

Key words： LC sinusoidal filter interior permanent magnet synchronous motor proportional integral controller active damping

Received: 12 September 2022

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TM351

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	Articles by authors
	Wu Xiang¹
	Li Chao¹
	Liu Zhiheng¹
	Han Yaofei²
	He Fengyou¹

Cite this article:

Wu Xiang¹,Li Chao¹,Liu Zhiheng¹等. Parameter Design of the Current Controller for Interior Permanent Magnet Synchronous Motor with LC Sinusoidal Filter to Suppress Resonance[J]. Transactions of China Electrotechnical Society, 2023, 38(22): 6082-6093.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.221734 OR https://dgjsxb.ces-transaction.com/EN/Y2023/V38/I22/6082

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