A High-gain Zero-input Current Ripple Sepic Converter

doi:10.11985/2023.04.022

Abstract

Abstract:

In view of the low voltage gain, hard state switch operation and large input ripple, a high-gain zero-input current ripple topology is proposed. The passive ripple unit is connected to the input end of the traditional Sepic converter, by coupling inductance and inductor capacitor series combination, retain the characteristics of continuous input current, while realizing the input current zero ripple effect, and zero ripple realization is independent of the duty cycle, so as to extend the service life of cells in photovoltaic modules, circuit reliability is high. Through the combination of double voltage unit structure and passive clamp absorption circuit, the voltage stress of the switch tube is reduced, which is convenient to use low voltage resistant switching devices, and the loss is reduced. On the basis of the equivalent model of the zero-input current ripple converter, the working principle of the converter is analyzed, and the working performance of the different converters are compared. Finally, a 100 W test prototype is built to verify the correctness of the theoretical analysis and the feasibility of the circuit.

Key words: Zero ripple, high-gain converter, coupled inductance, low voltage stress

CLC Number:

TM46

GUO Rui, GUO Jia, WANG Guohan. A High-gain Zero-input Current Ripple Sepic Converter[J]. Journal of Electrical Engineering, 2023, 18(4): 199-208.

Figures/Tables 18

性能	Sepic变换器	文献[6]所提变换器	文献[10]所提变换器	本文所提变换器
电压增益	$D 1 − D$	$1 + 3 D 1 − D$	$1 + N D 1 − D$	$1 + N + D 1 − D$
开关电压应力	$V 0 D$	$V 0 1 + 3 D$	$V 0 1 + N D$	$V 0 1 + N + D$
二极管反向恢复问题	大	大	小	小
开关开通状态	硬开关	硬开关	软开关	ZCS
输入电流电流纹波	大	小	小	零

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参数	数值/型号	参数	数值/型号
输入电压V_in/V	12	耦合电感匝比N	N_s/N_p=2
输出功率P_o/W	100	漏感L_K1/μH	1.8
开关频率f_s/kHz	50	漏感L_K2/μH	1.65
输入电感L₁/μH	120	电容C₁、C₂/μF	100
输入电感L₂/μH	120	电容C₃、C₀/μF	220
励磁电感L_m1/μH	123	电容C₄、C₅/μF	100
励磁电感L_m2/μH	87	二极管	FHP20100
耦合电感匝比N	N_s/N_p=1	开关管	IRF540N