NDLI: High-power bidirectional resonant DC–DC converter with equivalent switching frequency doubler

Content Provider	IET Digital Library
Author	Zong, Sheng Luo, Haoze Li, Wuhua Deng, Yan He, Xiangning
Abstract	A high-power double frequency bidirectional symmetrical DC–DC resonant converter is proposed to reduce the sizes of the passive components and increase the cost-effectiveness. Inspired by the bipolar and unipolar modulations for the single-phase inverter, an asymmetrical duty cycle double frequency modulation is originated for high-power bidirectional resonant converters whose switching frequency and power density are significantly limited by the high-power devices. The equivalent operating frequency of the resonant tank becomes twice of the switching frequency, which effectively reduces the volumes and costs of the passive components, especially for high-power high-voltage applications. Moreover, the proposed converter has the same output characteristics for the two power flow directions, which not only symmetrises the bidirectional frequency control, but also simplifies the design of the resonant components. The converter operation principle is illustrated and the converter performances are analysed including the principle of the double frequency modulation, output characteristics and soft switching condition. Finally, a 5 kW prototype is built to verify the analysis, and the resonant components for the conventional bidirectional resonant converter are also designed and compared to illustrate the advantages of the proposed converter.
Starting Page	834
Ending Page	842
Page Count	9
ISSN	17521416
Volume Number	10
e-ISSN	17521424
Issue Number	Issue 6, Jul (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/10/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2015.0437
Journal	IET Renewable Power Generation
Publisher Date	2016-07-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asymmetrical Duty Cycle Double Frequency Modulation Bidirectional Frequency Control Bipolar Modulation DC-DC Power Converter Double Frequency Modulation Principle Equivalent Switching Frequency Doubler Frequency Modulation Frequency Multipliers High-power Bidirectional Resonant DC-DC Converter High-power Device High-power Double Frequency Bidirectional Symmetrical DC-DC Resonant Converter High-power High-voltage Application Invertors Load Flow Output Characteristic Passive Component Size Reduction Power 5 KW Power Density Power Flow Directions Resonant Component Design Resonant Power Converter Resonant Tank Equivalent Operating Frequency Single-phase Inverter Soft Switching Condition Switching Circuit Switching Converter Unipolar Modulation Zero Current Switching Zero Voltage Switching
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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