Extendable space‑type switched‑capacitor multilevel inverter with fault‑tolerant capability

Low reliability is one of the main concerns in terms of multilevel inverters (MLI) due to the presence of a large number of switches and capacitors. Therefore, the fault-tolerant operation of MLIs has recently gained a great deal of attention. An extendable space-type switched-capacitor MLI topology with fault-tolerant characteristics is proposed in this paper. The proposed inverter employs a single direct-current voltage source and three capacitors to output staircase voltage levels with low distortion. The proposed topology is capable of tolerating open-circuit faults due to the separated charging paths of the inverter. Under pre-fault and post-fault operations, it preserves capacitor voltage balancing, voltage boost capability, as well as the ability to supply inductive loads. Furthermore, the voltage stresses of the switches and the voltage ripples of the capacitors are decreased or remain under post-fault operations. The proposed topology has been validated with a laboratory prototype in both dynamic and steady-state operations.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

Y. Wang, H. Zhang, J. Lai, K. Wang, J. Liang, "Extendable space‑type switched‑capacitor multilevel inverter with fault‑tolerant capability," Journal of Power Electronics, vol. 22, no. 6, pp. 923-934, 2022. DOI: 10.1007/s43236-022-00436-8.

[ACM Style]

Yaoqiang Wang, Hengtai Zhang, Jinmu Lai, Kewen Wang, and Jun Liang. 2022. Extendable space‑type switched‑capacitor multilevel inverter with fault‑tolerant capability. Journal of Power Electronics, 22, 6, (2022), 923-934. DOI: 10.1007/s43236-022-00436-8.