Evaluation of DPWM schemes for Si/SiC three‑level hybrid active NPC inverters


Vol. 22, No. 11, pp. 1825-1835, Nov. 2022
10.1007/s43236-022-00487-x




 Abstract

The hybrid utilization of SiC and Si devices can achieve a trade-off between the efficiency and cost of three-level active neutral-point-clamped (3L-ANPC) inverters. This paper studies a three-phase 2-SiC 3L-hybrid ANPC (3L-HANPC) inverter with different discontinuous pulse width modulation (DPWM) schemes. The principles of these DPWM schemes are analyzed in detail, and carrier-based algorithm for two of the DPWM schemes are given. Finally, a 6 kW three-phase 2-SiC 3L-HANPC inverter prototype was built to compare these two modulation schemes. Experimental results show that DPWM1 with its peak voltage-clamped can achieve a higher efficiency than DPWM2 with its zero-crossing clamped. However, the DPWM2 scheme has a lower THD than the DPWM1 scheme. Since the THD improvement contributed by the DPWM2 scheme is relatively small, the DPWM1 scheme is the preferred DPWM scheme.


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Cite this article

[IEEE Style]

H. Zhuge, L. Zhang, X. Lou, Z. Lei, Y. Zou, "Evaluation of DPWM schemes for Si/SiC three‑level hybrid active NPC inverters," Journal of Power Electronics, vol. 22, no. 11, pp. 1825-1835, 2022. DOI: 10.1007/s43236-022-00487-x.

[ACM Style]

Huizi Zhuge, Li Zhang, Xiutao Lou, Zhengzi Lei, and Yuhang Zou. 2022. Evaluation of DPWM schemes for Si/SiC three‑level hybrid active NPC inverters. Journal of Power Electronics, 22, 11, (2022), 1825-1835. DOI: 10.1007/s43236-022-00487-x.