NDLI: Interleaved resonant converter with the balanced flying capacitors

Content Provider	IET Digital Library
Author	Lin, Bor Ren Chen, Jeng Yu
Abstract	This study presents a new DC/DC converter for high input voltage and high load current applications. To adopt low voltage rating power devices in high voltage applications, two split capacitors with four active switches are used in the primary side to reduce the voltage stress of power switches at V in/2. Two flying capacitances are used to automatically balance two split capacitor voltages in every switching cycle. The proposed converter includes two resonant circuits to share the load current and to reduce the current stress of passive components. If the switching frequency is less than the series resonant frequency, power switches can be turned on under zero-voltage switching and rectifier diodes can be turned off under zero current switching. Therefore the switching losses on power semiconductors are reduced. The interleaved pulse-width modulation is adopted to further reduce the ripple current at output side. Thus, the output filter inductances can be reduced. Finally, experiments with a 1.2 kW prototype are provided to verify the effectiveness of the proposed converter.
Starting Page	447
Ending Page	457
Page Count	11
ISSN	17554535
Volume Number	8
e-ISSN	17554543
Issue Number	Issue 3, Mar (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/8/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2014.0041
Journal	IET Power Electronics
Publisher Date	2015-02-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Switches Balanced Flying Capacitor Capacitor DC-DC Power Converter DC/DC Converter Flying Capacitances Interleaved Pulse-width Modulation Interleaved Resonant Converter Load Current Low Voltage Rating Power Device Power 1.2 KW Power Electronics Power SemiConductor Power Semiconductor Device Power Semiconductor Switches Power Supply Power Switch Rectifier Diode Relay And Switches Resonant Circuit Resonant Power Converter Ripple Current Series Resonant Frequency Split Capacitor Supervisory Circuit Switching Cycle Switching Loss Voltage Stress Zero Current Switching Zero Voltage Switching
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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