New Single Switch Non-isolated High Transform Ratio DC-DC Converter

doi:10.11985/2019.02.003

Abstract

Abstract:

In order to solve the problems of low conversion ratio and high voltage stress of traditional Boost converter, a new single switch novel high conversion ratio DC-DC converter topology is proposed. The converter adopts non-isolation form, which can effectively reduce the loss of magnetic energy caused by leakage inductance in boost mode such as transformer or coupling inductance, and improve the power transfer ratio. The working principle of the proposed converter is analyzed in detail, and the transformation ratio equation based on the steady-state model is deduced. The experimental results show that the converter has the characteristics of high conversion ratio, low switching voltage stress and continuous input current. It is especially suitable for the grid-connected applications of new energy inverters such as fuel cells and solar cells.

Key words: High conversion ratio, low switching voltage stress, non-isolated Boost, new energy grid-connected inverter

CLC Number:

TM464

DING Min,WU Guiqing,LI Xinyi. New Single Switch Non-isolated High Transform Ratio DC-DC Converter[J]. Journal of Electrical Engineering, 2019, 14(2): 12-16.

Figures/Tables 15

References 7

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物理量	参数值	型号/条件
输入电压V_in/V	36
开关占空比D	0.4
开关频率f/kHz	50
开关管S	55 A/500 V	IXFK55N50
二极管VD1~VD6	16 A/600 V	MUR1660
电容C₁/μF	68	50 V
电容C₂/μF	100	150 V
电容C₃/μF	86	100 V
电容C₄/μF	150	200 V
电容C₅/μF	470	600 V
L₁/μH	60	7 A
L₂/μH	300	10 A
电阻R/k?	1	0.25 W

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