Practical evaluations of a novel asymmetrical ZCS-PWM DC-DC converter with high-frequency transformer-link

Tomokazu Mishima, Eiji Hiraki, Mutsuo Nakaoka

Research output: Contribution to journalArticle

3 Citations (Scopus)


The Republic of Korea This paper presents a novel Zero Current Switching (ZCS)-PWM controlled half-bridge DC-DC converter with High-Frequency (HF)-link. The newly-proposed soft switching DC-DC converter consists of a multi-resonant halfbridge HF-isolated inverter controlled by an asymmetrical PWM scheme and a center-tapped diode rectifier with a choke input filter. In order to attain the wide range of soft-commutation under the condition of constant switching frequency, the single Active Edge-Resonant Cell (AERC) that is composed of a lossless inductor and a switched resonant capacitor is originally employed for the half-bridge inverter arm, providing and assisting ZCS operations in the switching power devices. The ZCS-PWM DC-DC converter treated here is evaluated in experiments using the 800 W55 kHz prototype. The practical effectiveness of the proposed soft switching DC-DC converter is actually demonstrated and discussed with the experimental results under open loop and closed loop configurations. Finally, the feasibility of the DC-DC converter topology is discussed from the view points of the high efficiency and high power density.

Original languageEnglish
JournalIEEJ Transactions on Industry Applications
Issue number5
Publication statusPublished - 2010
Externally publishedYes



  • Active Edge-Resonant Cell (AERC)
  • Asymmetrical half-bridge DC-DC converter
  • High frequency (HF)-link
  • PWM
  • Soft switching
  • Zero current switching (ZCS)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering

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