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

  • 제27권4호
  • /
  • Pages.291-296
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  • 2022
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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NPC 인버터의 DC-link 커패시터 수명 향상을 위한 전압 변조 방법 비교 평가

Comparative Analysis of Pulse Width Modulation Methods for Improving the Lifetime of DC-link Capacitors of NPC Inverters

  • Choi, Jae-Heon (Dept. of IT Media Engineering, Seoul National University of Science and Technology) ;
  • Choi, Ui-Min (Dept. of Electronic & IT Media Engineering, Seoul National University of Science and Technology)
  • 투고 : 2021.01.28
  • 심사 : 2022.02.11
  • 발행 : 2022.08.20
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초록

Capacitor is one of the reliability-critical components in power converters. The lifetime of the capacitor decreases as the operating temperature increases, and power losses caused by capacitor current are the main cause of the capacitor temperature increase. Therefore, various studies are being conducted to improve the lifetime of the capacitor by reducing the current of DC-link capacitors. In this study, pulse width modulation methods proposed for improving the lifetime of DC-link capacitors of the three-level NPC inverter are comparatively analyzed. The lifetime evaluation of the DC-link capacitor under different modulation methods is performed at component level first and then system level by considering all capacitors by applying Monte Carlo simulation. Furthermore, their effects on the efficiency and THD of the output current are also considered.

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과제정보

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임. (No. 2019R1F1A1057164)

참고문헌

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