32V-300A/60kHz edge resonant soft-switching PWM DC/DC converter with DC rail series switch-parallel capacitor snubber assisted by high-frequency transformer parasitic components

Tetsuya Etoh, Tarek Ahmed, Eiji Hiraki, Keiki Morimoto, Khairy Fathy, Nabil A. Ahmed, Hyun Woo Lee, Mutsuo Nakaoka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The conduction losses of the active switches can be lowered, which are connected to the primary side of extremely step-down high frequency transformer because of low voltage large current rectifier configuration. This paper presents two new circuit topologies of DC busline side active edge resonant snubber assisted soft-switching PWM full-bridge DC-DC converter acceptable for either utility AC 200V-rms or AC 400V-rms input voltage source. One topology of proposed DC-DC converters is composed of a typical voltage source-fed full-bridge high frequency PWM inverter using DC busline side series power semiconductor switching devices with the aid of a parallel capacitive lossless snubber. All the active power switches in the full-bridge arms and DC busline can achieve ZCS turn-on and ZVS turn-off commutations and the total turn-off switching power losses of all active switches can be reduced for high-frequency switching action. It is proved that the more the switching frequency of full-bridge soft switching inverter increases, the more soft-switching PWM DC-DC converter with a high frequency transformer link has remarkable advantages for its efficiency and power density as compared with the conventional hard-switching PWM inverter type DC-DC converter. In this paper, another modified version topology of utility AC 200V-rms grid-connected soft switching DC-DC converter mentioned above is also implemented and evaluated, which is more suitable for utility 400V-rms grid power source. The effectiveness of these new DC-DC converters topologies is proved for low voltage and large current high efficiency DC-DC power supplies as TIG arc welding machine from a practical point of view.

Original languageEnglish
Title of host publicationIECON Proceedings (Industrial Electronics Conference)
Pages1159-1165
Number of pages7
Volume2005
DOIs
Publication statusPublished - 2005
Externally publishedYes
EventIECON 2005: 31st Annual Conference of IEEE Industrial Electronics Society - Raleigh, NC, United States
Duration: Nov 6 2005Nov 10 2005

Other

OtherIECON 2005: 31st Annual Conference of IEEE Industrial Electronics Society
CountryUnited States
CityRaleigh, NC
Period11/6/0511/10/05

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Etoh, T., Ahmed, T., Hiraki, E., Morimoto, K., Fathy, K., Ahmed, N. A., Lee, H. W., & Nakaoka, M. (2005). 32V-300A/60kHz edge resonant soft-switching PWM DC/DC converter with DC rail series switch-parallel capacitor snubber assisted by high-frequency transformer parasitic components. In IECON Proceedings (Industrial Electronics Conference) (Vol. 2005, pp. 1159-1165). [1569069] https://doi.org/10.1109/IECON.2005.1569069