采用新颖的PWM技术和DC-link结构实现DC/DC/AC变换器的最小电容尺寸

Industrial Electronics, 2002. ISIE 2002. Proceedings of the 2002 IEEE International Symposium on Pub Date : 1900-01-01 DOI:10.1109/ISIE.2002.1025833

A. Fratta, G. Griffero, P. Guglielmi, S. Nieddu, F. Villata

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引用次数: 5

摘要

就电池或燃料电池供电而言，由于直流电源电压范围实用，级联DC/DC/AC转换结构正在成为牵引交流电机驱动的突破。现有的工作提供了基本的知识和实践，以减少所需的反应成分的大小，这在一开始是一个令人望而却步的缺点。本文分析了DC/DC变换器和3φ-VSI变换器的直流链路纹波电流产生。报道了一种新的级联变换器的PWM策略，以提供最小的RMS电流要求和直流链路电容的尺寸。考虑到大电压瞬态响应和安全性，所提出的PWM策略甚至可能导致过低的电容值，因此需要进一步定义直流链路结构以保持整体优势。基于一个30千瓦的原型，所有的建议都经过了实验测试并成功验证。

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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Minimum capacitor size in DC/DC/AC converters by means of novel PWM technique and DC-link structure

As far as either battery or fuel-cell supplies are considered, cascaded DC/DC/AC conversion structures are becoming the breakthrough in traction AC motor drives, due to practical DC source voltage range. Established works provided fundamental knowledge and practice to reduce the size of needed reactive components, which at first appeared a prohibitive drawback. The paper analyses the DC-link current ripple generation of both DC/DC and 3φ-VSI converters. A new PWM strategy of the cascaded converters is reported to provide the minimum RMS current requirement and size of the DC-link capacitor. The proposed PWM strategy can result in even too low capacitance values, in respect of large voltage transient response and safety, so that further DC-link structure is defined to hold overall benefits. Based on a 30 kW prototype all proposals are experimentally tested and successfully validated.

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来源期刊

Industrial Electronics, 2002. ISIE 2002. Proceedings of the 2002 IEEE International Symposium on

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