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

The Korean Institute of Power Electronics (전력전자학회)
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High-Efficiency Dual-Buck Inverter Using Coupled Inductor

결합 인덕터를 이용한 효율적인 단상 듀얼-벅 인버터

  • Yang, Min-Kwon (Division of Electronic Engineering, Chonbuk Nat'l University) ;
  • Kim, Yu-Jin (Division of Electronic Engineering, Chonbuk Nat'l University) ;
  • Cho, Woo-Young (Division of Electronic Engineering, Chonbuk Nat'l University)
  • Received : 2019.09.11
  • Accepted : 2019.10.07
  • Published : 2019.12.20
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Abstract

Single-phase full-bridge inverters have shoot-through problems. Dead time is an essential way of solving these issues, but it distorts the output voltage and current. Dual-buck inverters are designed to eliminate the abovementioned problems. However, these inverters result in switching power loss and electromagnetic interference due to the diode reverse-recovery problem. Previous studies have suggested reducing the switching power loss from diode reverse-recovery, but their proposed methods have complex circuit configurations and high system costs. To alleviate the switching power loss from diode reverse-recovery, the current work proposes a dual-buck inverter with a coupled inductor. In the structure of the proposed inverter, the current flowing into the original diode is divided into a new diode. Therefore, the switching power loss is reduced, and the efficiency of the proposed inverter is improved. Simulation waveforms and experimental results for a 1.0 kW prototype inverter are discussed to verify the performance of the proposed inverter.

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References

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