NDLI: Implementation of a new medium voltage asymmetric pulse-width modulation converter with balanced input capacitor voltages

Content Provider	IET Digital Library
Author	Lin, Bor Ren Zhang, Sheng Zhi
Abstract	A 1.44 kW DC/DC converter with zero voltage switching (ZVS) for medium voltage applications is proposed in this study. Two half-bridge circuits with split capacitors are connected in series at high voltage side to limit voltage stresses of power switches at V in/2. Three DC/DC circuits are adopted to share load current and reduce the current stress of rectifier diodes, transformers and output filter inductors. Two balance capacitors are used in the proposed circuit to automatically balance input split capacitor voltages in every switching cycle. The current doubler rectifier is adopted at low voltage side to partially cancel ripple current so that the root-mean-square current at output capacitor is reduced. Asymmetric pulse-width modulation is used to adjust the duty cycle of power switches and regulate output voltage. The output capacitance of power switches and the external resonant inductance are resonant at the transition interval and power metal-oxide-semiconductor field-effect transistors can be turned on under ZVS. The proposed converter can be applied for high input voltage applications such as a three-phase 380 V/480 V utility system. Experimental results from a 750–800 V input and 24 V/60 A output are provided to demonstrate the performance of proposed converter.
Starting Page	1411
Ending Page	1419
Page Count	9
ISSN	17554535
Volume Number	8
e-ISSN	17554543
Issue Number	Issue 8, Aug (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/8/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2014.0760
Journal	IET Power Electronics
Publisher Date	2015-05-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Balance Input Split Capacitor Voltage Regulation Bridge Circuit Capacitor Switching Current 60 A Current Doubler Rectifier DC-DC Converter DC-DC Power Converter External Resonant Inductance Field Effect Transistor Switches Half-bridge Circuit Inductance Insulated Gate Field Effect Transistors Interpolation And Function Approximation Load Current Sharing Mean Square Error Method Medium Voltage Asymmetric Pulse Width Modulation Converter Numerical Analysis Output Filter Inductor Power 1.44 KW Power Filter Power Metal Oxide Semiconductor Field Effect Transistor Power Switch Voltage Stress Limitation Power Transformer PWM Power Converter PWM Rectifier Rectifier Diode Current Stress Reduction Ripple Current Cancel Root Mean Square Current Switched Capacitor Network Switching Converter Switching Cycle Transformer And Reactors Transformer Current Stress Reduction Voltage 24 V Voltage 750 V to 800 V Voltage Control Zero Voltage Switching ZVS
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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