Q.-X. Guan, C. Li, Y. Zhang, S. Wang, D.-D. Xu, W. Li, H. Ma, Oct 2018, An Extremely
High Efficient Three-Level Active Neutral-Point-Clamped Converter Comprising SiC and
Si Hybrid Power Stages, IEEE Trans. Power Electron., Vol. 33, No. 10, pp. 8341-8352