An Isolated Buck-Boost Converter with Hybrid Three-Level Rectifier for Wide and High Output Voltage Applications

2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC) Pub Date : 2018-08-01 DOI:10.1109/EPEPEMC.2018.8521967

Mengxi Li, Yangjun Lu, Yu Yu, Hongfei Wu, Y. Xing, Xudong Ma

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引用次数: 2

Abstract

An isolated Buck-Boost (IBB) converter with hybrid three-level rectifier, which is composed of a two-level diode rectifying-leg and a semi-active three-level rectifying-leg, is analyzed and evaluated in this paper. The diodes and active switches in the semi-active three-level rectifying-leg is only half of output voltage, which makes this converter more suitable for high output voltage applications. Both step-up and step-down voltage conversion are realized by adopting optimized phase-shift modulation strategy. In addition, soft-switching of all the active switches and diodes on both primary and secondary sides are achieved within wide operation range. All these features make the IBB converter be suitable for wide and high output voltage applications. Operational principles and characteristics of this converter are analyzed in detail. Experimental results with a 2kW prototype are provided to evaluate the effectiveness and advantages of the presented converter.

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一个隔离降压-升压转换器与混合三电平整流器为宽和高输出电压的应用

本文对一种由二电平二极管整流腿和半有源三电平整流腿组成的混合式三电平整流隔离式Buck-Boost (IBB)变换器进行了分析和评价。半有源三电平整流支路中的二极管和有源开关仅为输出电压的一半，这使得该变换器更适合高输出电压应用。采用优化的移相调制策略实现升压和降压电压转换。此外，在较宽的工作范围内实现了所有主次侧有源开关和二极管的软开关。所有这些特点使IBB变换器适用于宽输出电压和高输出电压的应用。详细分析了该变换器的工作原理和特点。通过2kW样机的实验结果，验证了该变换器的有效性和优越性。

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

2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)

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