This paper presents a performance investigation and design optimization of a high efficiency three-level Active Neutral Point Clamped (ANPC) inverter topology using hybrid Si/SiC switches. It uses a modulation strategy that produces a cluster of low frequency switches commutating at fundamental line frequency (realized with Si IGBTs) and high frequency switches commutating at carrier frequency (realized with hybrid Si/SiC switches) to facilitate a tradeoff between the inverter efficiency and cost. A generalized Si/SiC current rating ratio optimization algorithm is presented for the hybrid Si/SiC switches based on the power loss profile of ANPC inverter. This algorithm determines the optimal current rating ratio between the Si IGBT and SiC MOSFET for the hybrid Si/SiC switches based on the inverter operating specification and Si/SiC gate control technique to achieve the best tradeoff between cost, loss and reliability. The performance of the proposed ANPC inverter system is investigated and compared with other similar ANPC inverter systems. The proposed ANPC inverter system achieves higher efficiency compared to an all Si IGBT based ANPC inverter system, all SiC MOSFET based ANPC inverter system, and other ANPC inverter systems consisting mixed Si IGBT and SiC MOSFET devices. On the other hand, the semiconductor device cost of the proposed ANPC inverter system is much lower than an all SiC MOSFET based ANPC inverter system and the mixed Si IGBT and SiC MOSFET based ANPC inverter systems while it is on par with an all Si IGBT based ANPC inverter system.

中文翻译：

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使用混合硅/碳化硅开关的高效低成本 ANPC 逆变器

本文介绍了使用混合 Si/SiC 开关的高效三电平有源中性点钳位 (ANPC) 逆变器拓扑的性能调查和设计优化。它使用调制策略产生一组以基本线路频率换向的低频开关（通过 Si IGBT 实现）和高频开关以载频换向（通过混合 Si/SiC 开关实现），以促进逆变器效率和成本。基于ANPC逆变器的功率损耗曲线，提出了一种用于混合Si/SiC开关的通用Si/SiC额定电流比优化算法。该算法基于逆变器工作规范和 Si/SiC 栅极控制技术，为混合 Si/SiC 开关确定 Si IGBT 和 SiC MOSFET 之间的最佳额定电流比，以实现成本、损耗和可靠性之间的最佳权衡。研究了所提出的 ANPC 逆变器系统的性能，并与其他类似的 ANPC 逆变器系统进行了比较。与基于全 Si IGBT 的 ANPC 逆变器系统、基于全 SiC MOSFET 的 ANPC 逆变器系统以及由混合 Si IGBT 和 SiC MOSFET 器件组成的其他 ANPC 逆变器系统相比，所提出的 ANPC 逆变器系统实现了更高的效率。另一方面，