Hyun-Woo Sim, June-Seok Lee, and Kyo-Beum Lee, "Detecting Open-Switch Faults: Using Asymmetric Zero-Voltage Switching States," IEEE Industry Applications Magazine, vol. 221, no. 2, pp. 27–37, Mar./Apr. 2016. -SCIE > Paper

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International Journals Hyun-Woo Sim, June-Seok Lee, and Kyo-Beum Lee, "Detecting Open-Switch Faults: Using Asymmetric Zero-Voltage Switching States," IEEE Industry Applications Magazine, vol. 221, no. 2, pp. 27–37, Mar./Apr. 2016. -SCIE

2016

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This article presents a detection method for an open-switch fault in cascaded H-bridge multilevel inverters (CHMIs). Recently, CHMIs

were widely used in high-power systems. Therefore, the reliability of this topology has become an important factor. To improve the

reliability, methods for detecting openswitch faults are required. The proposed method is based on the current path analysis

according to zero-voltage switching states. The location of both faulty cells and switches can be detected from the current waveform

and zero-voltage switching states. This method is applicable when using the level-shifted pulsewidth modulation (LSPWM), which

is commonly used for a modulation method in CHMIs. The performance of the proposed detection method is verified by simulation

and experimental results.  

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