Calculation of RMS Current Load on DC-Link Capacitors for Multiphase Machine Drives under Carrier-Phase Shift Control

IF 1 Q4 AUTOMATION & CONTROL SYSTEMS

Journal of Control Science and Engineering Pub Date : 2023-04-25 DOI:10.1155/2023/6909403

Zhigang Zhang, Pengcheng Zhang, Yang Zhang, Wenjuan Zhang, Mengdi Li, Zichen Xiong

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引用次数: 0

Abstract

The reliability and economy of dc-link capacitors are important concerns in multiphase drive systems. Due to the parallel connection of several converters, the dc-link capacitors are subjected to a higher RMS current, and the root mean square (RMS) current of dc-link capacitors is an important reference standard to determine its lifetime, cost, and volume. In this paper, the RMS current of dc-link capacitor is calculated by using the dual Fourier integral method and the effect of carrier interleave is studied. Meanwhile, the modulation ratio, harmonic sidebands, and switching frequency are also considered. In order to optimize the reliability and economy of the multiphase drive system, a Cotes method combined with carrier-phase shifting technology (CPST) for calculating RMS current of the dc-link capacitor is proposed. The proposed method can provide optimization guidance for the design of dc-link capacitors. Finally, the analytical and experiment results are compared with the existing methods, and the experimental results verify the effectiveness of the proposed method.

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载波移相控制下多相电机直流电容有效值电流负载的计算

直流电容的可靠性和经济性是多相驱动系统中的重要问题。由于多个变换器并联，直流电容承受较高的均方根电流，而直流电容的均方根电流是决定其寿命、成本和体积的重要参考标准。本文采用对偶傅立叶积分法计算了直流电容的均方根电流，并研究了载波交织的影响。同时，还考虑了调制比、谐波边带和开关频率。为了优化多相驱动系统的可靠性和经济性，提出了一种结合载波移相技术(CPST)计算直流电容有效值电流的Cotes方法。该方法可为直流链路电容器的优化设计提供指导。最后，将分析和实验结果与现有方法进行了比较，实验结果验证了所提方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Control Science and Engineering AUTOMATION & CONTROL SYSTEMS-

CiteScore

4.70

自引率

0.00%

发文量

审稿时长

19 weeks

期刊介绍： Journal of Control Science and Engineering is a peer-reviewed, open access journal that publishes original research articles as well as review articles in all areas of control science and engineering.