The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Study on Transformer Saturation in Isolated Full-Bridge DC-DC Converters

절연형 풀브리지 DC-DC 컨버터에서의 변압기 포화에 관한 연구

  • Kim, Jeonghun (School of Energy Eng., Kyungpook Nat'l University) ;
  • Cha, Honnyong (School of Energy Eng., Kyungpook Nat'l University)
  • Received : 2020.01.14
  • Accepted : 2020.02.25
  • Published : 2020.08.20
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Abstract

Transformer saturation in full bridge (FB) isolated DC-DC converters is caused by uneven switching speeds and voltage drops in semiconductor devices and mismatched gate signals. In order to prevent transformer saturation, most popular and widely used approach is to insert a capacitor in series with the transformer windings. This study conducts extensive analyses on transformer saturation and the effect of DC blocking capacitors when they are placed in the primary or secondary windings of a transformer. The effect of the DC blocking capacitors is verified in voltage-fed and current-fed FB converters.

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References

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