NDLI: Modified Three-Phase Three-Level DC/DC Converter With Zero-Voltage-Switching Characteristic-Adopting Asymmetrical Duty Cycle Control

Content Provider	IEEE Xplore Digital Library
Author	Fuxin Liu Yue Chen Gaoping Hu Xinbo Ruan
Copyright Year	1986
Abstract	In the applications for high-power dc/dc conversion, the power devices usually suffer high voltage and current stress in traditional single-phase dc/dc topologies such as forward, half-bridge, and full-bridge converters, which limits the power level of converter to reach higher. As a superior alternative solution, a three-phase three-level (TPTL) dc/dc converter was investigated in this paper, which has the advantages of lower voltage and current stress on switches, as well as fewer power devices. Adopting a symmetrical control strategy, the input current and output current frequency can be increased by a factor of six compared to the switching frequency, resulting in a reduced filter requirement. However, all the switches are hard-switching, leading to a considerable switching loss. In this paper, an asymmetrical duty cycle control strategy was proposed to the TPTL dc/dc converter. The modified converter remains all the advantages of original control strategy; meanwhile, soft-switching can be achieved using the energy stored in output filter inductance and leakage inductances of transformers (or resonant inductances). The theoretical analysis was presented in details, along with the characteristics and soft-switching condition of the converter. Experimental results from 540 to 600 V input and 48 V/20 A output were presented to verify the theoretical analysis and the performance of the modified converter.
Sponsorship	IEEE Power Electronics Society
Starting Page	6307
Ending Page	6318
Page Count	12
File Size	1345626
File Format	PDF
ISSN	08858993
Volume Number	29
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	DC-DC power converters Switches Stress Voltage control Zero voltage switching Capacitors zero-voltage switching Asymmetrical duty cycle control dc/dc converter three-level three-phase
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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