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.

SiC 和 Si 器件的混合使用可以在三电平有源中点钳位 (3L-ANPC) 逆变器的效率和成本之间取得平衡。本文研究了具有不同不连续脉宽调制 (DPWM) 方案的三相 2-SiC 3L-混合 ANPC (3L-HANPC) 逆变器。详细分析了这些DPWM方案的原理，给出了两种DPWM方案的基于载波的算法。最后，构建了一个 6 kW 三相 2-SiC 3L-HANPC 逆变器原型来比较这两种调制方案。实验结果表明，峰值电压钳位的 DPWM1 比过零钳位的 DPWM2 的效率更高。但是，DPWM2 方案的 THD 低于 DPWM1 方案。由于 DPWM2 方案贡献的 THD 改善相对较小，