The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Analysis of A Fixed Frequency LCL-type DC-DC Converter Including the Effect of High-Frequency Transformer

변압기 영향을 포함한 고정주파수 LCL형 DC-DC 컨버터 해석

  • Park, Sangeun (Agency for defense development) ;
  • Cha, Hanju (Dept. of Electrical Engineering, Chung-nam Nat'l University)
  • Received : 2015.03.15
  • Accepted : 2015.12.24
  • Published : 2016.01.01
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Abstract

An LCL-type Isolated dc-dc converter operating for constant output voltage is analyzed, including the effect of a high frequency transformer using ac complex circuit approximation. Its solution is derived and is used to obtain the characteristics of the proposed converter. The analyses show through converter modeling, phasor diagram and gain comparison that inclusion of a high frequency transformer results in introduction of magnetizing inductance and leakage inductances at conventional LCL dc-dc converter with ideal transformer. The theoretical and simulation results are presented in case of the wide variations in input voltage and load current in detail. Analysis and simulation results observed that introduction of a transformer in the dc-dc converter had considerable effect on the performance, especially in the case of low output voltage and large load.

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References

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