Three‑phase flying‑capacitor MMC with six coupled inductors


Vol. 20, No. 4, pp. 916-925, Jul. 2020
10.1007/s43236-020-00099-3




 Abstract

In this paper, the design and integration of coupled inductors have been proposed for a flying-capacitor (FC) modular multilevel converter (MMC) for induction motor drive applications. In the conventional three-phase FC-MMC, twelve discrete inductors are needed for three legs. However, by integrating one coupled inductor with two windings in two half-arms, the number of inductors required is reduced from 12 to 6. Accordingly, the overall volumes and weights of cores and windings can be reduced by 41.7% and 41.4% when compared with discrete inductors. To confirm the validity of the proposed coupled inductor, a 4160-V/1-MW simulation model of a FC-MMC and a 220-V/3-kW scaled-down prototype have been built, of which performance for induction motor drives has been tested from standstill to the rated speed.


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Cite this article

[IEEE Style]

D. D. Le, D. Lee, H. Kim, "Three‑phase flying‑capacitor MMC with six coupled inductors," Journal of Power Electronics, vol. 20, no. 4, pp. 916-925, 2020. DOI: 10.1007/s43236-020-00099-3.

[ACM Style]

Duc Dung Le, Dong-Choon Lee, and Heung-Geun Kim. 2020. Three‑phase flying‑capacitor MMC with six coupled inductors. Journal of Power Electronics, 20, 4, (2020), 916-925. DOI: 10.1007/s43236-020-00099-3.