NDLI: Modular zero-voltage switching converter for direct current microgrid applications

Content Provider	IET Digital Library
Author	Lin, Bor Ren
Abstract	This study presents a high-voltage zero-voltage switching converter with balance capacitors in the direct current microgrid. In the proposed converter, full-bridge circuits with primary-series and secondary-parallel connection are used for high-voltage input and high-current output applications. The series connection of full-bridge circuits reduces the voltage rating of power switches in each full-bridge circuit cell. Therefore, high-speed power metal–oxide–semiconductor field-effect transistors are employed to reduce the converter size. Flying capacitors are connected between each full-bridge circuits so that the input split voltages can be balanced automatically in every switching period without using the complexity control scheme. The phase-shift pulse-width modulation scheme is used to regulate the output voltage. The power switches can be turned on at zero voltage due to the energy stored in the output inductors or primary leakage inductors and the switching losses are reduced. The output sides of the full-bridge circuits are connected in parallel to reduce the current ratings of transformer secondary windings and passive power components. Finally, experiments are provided to validate the characteristics and usefulness of the proposed converter in microgrid applications.
Starting Page	1813
Ending Page	1821
Page Count	9
ISSN	17554535
Volume Number	11
e-ISSN	17554543
Issue Number	Issue 11, Sep (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/11/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2017.0489
Journal	IET Power Electronics
Publisher Date	2018-05-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Balance Capacitor Bridge Circuit Capacitor Distributed Power Generation Full-bridge Circuit High-speed Power Metal–oxide–semiconductor Field-effect Transistors High-voltage Zero-voltage Switching Converter Inductor Insulated Gate Field Effect Transistors Microgrid System Modular Zero-voltage Switching Converter MOSFET Power Converter Power Electronics Power Supplies to Apparatus Power Supply Power Switch PWM Power Converter Supervisory Circuit Switching Converter Voltage Rating Zero Voltage Switching
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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