A Double-Boost Converter Based on Coupled Inductance and Magnetic Integration

Hongzhu Li,Ling Zhu,Le Wang,Yuh-Shyan Hwang

doi:10.1155/2021/8014620

Hongzhu Li, Ling Zhu + Show 2 more

Open Access

https://doi.org/10.1155/2021/8014620

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Abstract

High-voltage gain converter has a high-frequency use in some industrial fields, for instance, the fuel cell system, the photovoltaic system, electric vehicles, and the high-intensity discharge lamp. In order to solve the problem of the low-voltage gain of traditional boost converter, the double-boost converter with coupled inductance and doubled voltage is proposed, which connects the traditional boost converter in parallel. The voltage gain of the converter is further improved by introducing the voltage-doubled unit of the coupled inductance. Moreover, the clamp capacitor can absorb the leakage inductance in the circuit and reduce the voltage stress of the switch. In addition, two coupled inductors are magnetically collected; then, the loss of the core is analyzed under the same gain. The detailed analysis of the proposed converter and a comparison considering other topologies previously published in the literature are also presented in this article. In order to verify the proposed converter performance, a prototype has been built for a power of 200 W, input and output voltages of 12 and 84 V, respectively, and a switching frequency of 50 kHz. Experimental results validate the effectiveness of the theoretical analysis proving the satisfactory converter performance, whose peak efficiency is 95.5%.

Highlights

Ere are only two power switches on the current path, and the voltage stress on the active switch is lower
In literature [19], the traditional boost converter and SEPIC converter are used as an alternative structure of the series output module. e boost converter and the SEPIC converter use the same boost inductor and the same switch, which can reduce the input current ripple while maintaining the characteristics of the boost converter. e circuit topology proposed in [20] uses switched capacitor voltage doubler and an integrated LC2D output network to increase the voltage gain of the converter and reduce the voltage stress on the power switch
It has a continuous input current, low-voltage stress on its semiconductor device, and a constant potential difference between its input and output grounded terminals. e converter is under a wide range of voltage gain and can adapt to the soft output characteristics of the fuel cell. is research proposes a dual boost converter with coupled inductance voltage doubling unit clamped to the ground

Summary

Introduction

Ere are only two power switches on the current path, and the voltage stress on the active switch is lower. E circuit topology proposed in [20] uses switched capacitor voltage doubler and an integrated LC2D output network to increase the voltage gain of the converter and reduce the voltage stress on the power switch. On this basis, a clamping capacitor is introduced to absorb the leakage inductance in the coupled inductor and suppress the reverse problem of the diode.

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