Influence of open‑switch failures on DC‑link capacitors in hybrid ANPC inverters

Ha-Rang Jo; Youngjong Ko; Kyo-Beum Lee

Influence of open‑switch failures on DC‑link capacitors in hybrid ANPC inverters

Ha-Rang Jo

Youngjong Ko

Kyo-Beum Lee

Vol. 21, No. 11, pp. 1735-1742, Nov. 2021

10.1007/s43236-021-00309-6

Capacitor lifetime

Neutral point current harmonics

Open-switch failure

Hybrid ANPC

Abstract

This paper analyzes the influence of a DC-link capacitor under open-switch failures in hybrid active neutral point clamped (ANPC) inverters that consist of Si-IGBTs and SiC-MOSFETs. Open-switch failures cause the current harmonic distortion of DC-link capacitors. This distorted current affects the capacitor loss increase, which in turn affects the lifetime decrement of the DC-link capacitor. These influences of open-switch failures on inverter operation have not been discussed despite the fact that they lead to secondary failures of the system. In this paper, the influence of open-switch failure is analyzed based on the current harmonics of the DC-link capacitor, which experiences the highest failure rate. Simulation and experimental results demonstrate the effects of various open-switch failure scenarios on DC-link capacitors in terms of current harmonics and lifetime.

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Cite this article

[IEEE Style]

H. Jo, Y. Ko, K. Lee, "Influence of open‑switch failures on DC‑link capacitors in hybrid ANPC inverters," Journal of Power Electronics, vol. 21, no. 11, pp. 1735-1742, 2021. DOI: 10.1007/s43236-021-00309-6.

[ACM Style]

Ha-Rang Jo, Youngjong Ko, and Kyo-Beum Lee. 2021. Influence of open‑switch failures on DC‑link capacitors in hybrid ANPC inverters. Journal of Power Electronics, 21, 11, (2021), 1735-1742. DOI: 10.1007/s43236-021-00309-6.