A ZVT Auxiliary Circuit for High Step-Up Multi-Input Converters with Diode-Capacitor Multiplier

Q4 Engineering Majlesi Journal of Electrical Engineering Pub Date : 2021-06-01 DOI:10.52547/mjee.15.2.53

Sayed Hossein Mirlohi, M. Yazdani, M. Amini

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Abstract

In this paper, a Zero-Voltage Transition (ZVT) non-isolated high step-up multi-input DC-DC converters is proposed which employs anauxiliary cell and diode-capacitor multiplier. The auxiliary cell has only one switch and is suitable for high step converters with diode-capacitor multiplier. In the proposed converter, all semiconductor devices operate under fully soft switching condition. The main switches turn on and turn off under Zero Voltage Switching (ZVS) condition whereas the auxiliary switch turns on under Zero Current Switching (ZCS) condition and turns off under zero Voltage and Zero Current Switching (ZVZCS) condition. Also, ZCS condition at turn-off is provided for all diodesto eliminate reverse recovery issue.The structure of the proposed converter includestwo boost cells, one diode-capacitor multiplier cell, and one ZVT auxiliary circuit. Soft switching conditions for all main switches are provided by only one auxiliary circuit.The proposed converter has high step-up conversion gain without any coupledinductor. Soft switching conditions, continuous current of input sources, high efficiency,expansion capability of input sources,returning the energy of the auxiliary circuit to the diode-capacitor multiplier and low-voltage stress on switches are the main advantages of the proposed converter. The steady-state analysis of the converter and operation modes are discussed. A 160-W prototype of the proposed converter is designed and implemented.Experimental results confirmthatthe theoretical and the efficiency of the proposed converter reaches 96.4% at the nominal load

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用于二极管电容乘法器的高阶升压多输入变换器的ZVT辅助电路

本文提出了一种采用辅助单元和二极管电容乘法器的零电压转换（ZVT）非隔离高压升压多输入DC-DC变换器。辅助单元只有一个开关，适用于具有二极管-电容器乘法器的高阶转换器。在所提出的转换器中，所有半导体器件都在全软开关条件下工作。主开关在零电压开关（ZVS）条件下导通和关断，而辅助开关在零电流开关（ZCS）条件下接通，在零电压和零电流开关条件下关断。此外，为所有diodest提供了关断时的ZCS条件，以消除反向恢复问题。所提出的转换器的结构包括两个升压单元、一个二极管电容器乘法器单元和一个ZVT辅助电路。所有主开关的软开关条件仅由一个辅助电路提供。所提出的转换器在没有任何耦合导体的情况下具有高的升压转换增益。软开关条件、输入源的连续电流、高效率、输入源扩展能力、将辅助电路的能量返回到二极管-电容器乘法器以及开关上的低电压应力是所提出的转换器的主要优点。讨论了变换器的稳态分析和工作模式。设计并实现了所提出的转换器的160-W原型。实验结果表明，该变换器在额定负载下的理论效率和效率均达到96.4%

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来源期刊

Majlesi Journal of Electrical Engineering Engineering-Electrical and Electronic Engineering

CiteScore

1.20

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0.00%

发文量

期刊介绍： The scope of Majlesi Journal of Electrcial Engineering (MJEE) is ranging from mathematical foundation to practical engineering design in all areas of electrical engineering. The editorial board is international and original unpublished papers are welcome from throughout the world. The journal is devoted primarily to research papers, but very high quality survey and tutorial papers are also published. There is no publication charge for the authors.