NDLI: Non-isolated high-step-up soft switching DC/DC converter with low-voltage stress

Content Provider	IET Digital Library
Author	Gao, Wei Zhang, Yang Lv, Xing yu Lou, Quan ming
Abstract	A non-isolated high-step-up soft switching DC/DC converter with low-voltage stress is developed for large conversion ratio applications, which combines a synchronous boost converter and a flyback converter with voltage multiplier in this study. The circuit structure is simplified by integrating the boost inductor and flyback transformer into a coupled inductor and sharing the switch. The voltage stresses of all the power devices are low, thus low-voltage-rated power devices can be adopted to reduce conduction losses. All of the switches operate under zero-voltage turn-on condition, thus the switching losses are reduced. Moreover, the reverse-recovery problem of the diodes is alleviated because the decreasing rate of the diode current is limited by the leakage inductance of the coupled inductor. Additionally, the utilisation rate of the coupled inductor is improved because the coupled inductor transfers energy during the whole switching period. Finally, a 250 W prototype is built and the experimental results are provided to verify the accuracy of the theoretical analysis, and the highest measured efficiency is about 96.6%.
Starting Page	120
Ending Page	128
Page Count	9
ISSN	17554535
Volume Number	10
e-ISSN	17554543
Issue Number	Issue 1, Jan (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/10/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2016.0323
Journal	IET Power Electronics
Publisher Date	2017-01-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Analogue Circuit Boost Inductor Circuit Structure Conduction Loss Reduction Coupled Inductor DC-DC Power Converter Diode Current Flyback Converter Flyback Transformer Leakage Inductance Low-voltage Stress Low-voltage-rated Power Device Nonisolated High-step-up Soft Switching DC-DC Converter Power 250 W Power Device Power Electronics Power Supply Reverse-recovery Problem Supervisory Circuit Switched Mode Converter Switching Converter Synchronous Boost Converter Voltage Multiplier Voltage Multipliers Zero Voltage Switching Zero-voltage Turn-on Condition
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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