Three-Level NPC-Based Dual Active Bridge Converter의 도통손실 절감을 위한 새로운 스위칭 방법
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- Three-Level NPC-Based Dual Active Bridge Converter의 도통손실 절감을 위한 새로운 스위칭 방법
- Other Titles
- A Control Method to Improve Power Conversion Efficiency of Three-level NPC-Based Dual Active Bridge Converter
- 이준영; 최현준; 김주용; 정지훈
- Issue Date
- 전력전자학회 논문지, v.22, no.2, pp.150 - 158
- This study proposes a new pulse-width modulation switching pattern for the low conduction loss of a three-level neutral point clamped (NPC)-based dual-active bridge (DAB) converter. The operational principle for a bidirectional power conversion is a phase-shift modulation. The conventional switching method of the three-level NPC-based DAB converter shows a symmetric switching pattern. This method has a disadvantage of high root-mean-square (RMS) value of the coupling inductor current, which leads to high conduction loss. The proposed switching method shows an asymmetrical pattern, which can reduce the RMS value of the inductor current with lower conduction loss than that of the conventional method. The performance of the proposed asymmetrical switching method is theoretically analyzed and practically verified using simulation and experiment.
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