Analysis and Control of DC-link Voltage Stabilization in Small Capacitor Motor Drive System

被引：0

作者：

Lin H. ^{[1
]}

Song W. ^{[1
]}

Zhao L. ^{[1
]}

机构：

[1] School of Mechatronic Engineering and Automation, Shanghai University, Baoshan District, Shanghai

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 18期

关键词：

Active damping control; Characteristics of impedance; Permanent magnet synchronous motor (PMSM); Small capacitance; Stability of DC-link;

D O I：

10.13334/j.0258-8013.pcsee.191848

中图分类号：

学科分类号：

摘要：

The stability of DC-link with small capacitance in motor drive system had been researched in this paper. Due to the constant power characteristic of negative impedance of the drive motor to the DC-link in the control process, the system may be unstable. Aiming at this problem, impedance method was used to analyze the stability of the system. The output impedance of DC-link LC filter and the input impedance of motor drive system were derived to construct the transfer function of the system, and the stability criterion were obtained. The influence of the parameters of both impedances on the stability of DC-link voltage was discussed. After analyzing the characteristics of impedance, an active damping control method based on virtual resistance was proposed to increase the damping of DC-link without additional real resistor. The control method is able to guarantee the stability of DC-link voltage when the capacitance is small and cannot meet the system stability requirements. The proposed method was compared with the passive damping control method in which a physical resistance was used. The simulation and experimental results verify the effectiveness of the proposed method. © 2020 Chin. Soc. for Elec. Eng.

引用

页码：5997 / 6005

页数：8

共 24 条

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