Bidirectional DC-DC Converter with a Wide-Range Voltage Conversion Ratio

2019 IEEE 4th International Future Energy Electronics Conference (IFEEC) Pub Date : 2019-11-01 DOI:10.1109/IFEEC47410.2019.9014688

J. Teng, Siwei Chen, Shang-Wen Luan, Jia-Rui Xu

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引用次数: 5

Abstract

A bidirectional DC-DC converter with a wide- range voltage conversion ratio is proposed in this paper. The characteristic of wide-range voltage conversion ratio can be utilized in the energy conversion of retired batteries, such as electric scooters, electric vehicles, electrical buses, electric trucks etc. with different voltage levels. The proposed converter is composed of cascading a two-phase interleaved half-bridge circuit and a voltage-doubler circuit. The two-phase interleaved half-bridge circuit and the voltage-doubler circuit are defined as terminals A and B, respectively to investigate the operational stages of the proposed converter and analyze the voltage conversion ratios under different voltage-level schemes. Due to the variable structure design and control of the proposed converter, a wide-range voltage converter ratio and bidirectional step-up/step-down function can be achieved. A prototype for the proposed bidirectional DC-DC converter with a rated voltage of 150V at terminal A, a rated voltage between 25V and 1050V at terminal B and a rated power of 1100W is designed and implemented in this paper. Experimental results demonstrate that the proposed bidirectional DC-DC converter can be operated in the different modes with respect to different voltage levels. Meanwhile, the maximum conversion efficiency of above 98% can be achieved.

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具有宽电压转换比的双向DC-DC变换器

提出了一种宽电压转换比的双向DC-DC变换器。大范围电压转换比的特性可用于不同电压等级的电动滑板车、电动汽车、电动公交车、电动卡车等退役电池的能量转换。该变换器由级联两相交错半桥电路和倍压电路组成。将两相交错半桥电路和倍压电路分别定义为终端A和B，以研究所提出的变换器的工作级，并分析不同电压电平方案下的电压转换比。由于变换器的可变结构设计和控制，可以实现大范围的电压变换器比和双向升压/降压功能。本文设计并实现了A端额定电压为150V, B端额定电压为25V ~ 1050V，额定功率为1100W的双向DC-DC变换器样机。实验结果表明，所提出的双向DC-DC变换器可以在不同电压水平下工作在不同模式下。同时，最大转换效率可达98%以上。

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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2019 IEEE 4th International Future Energy Electronics Conference (IFEEC)

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