High Power Density Hybrid Si-WBG Type of Converters for high Performance High Density Electric Motor Drives Applications

电力电子变换器（PECs）是一种普遍和最有效的技术，用于交流到直流的功率转换，反之亦然。它们用于各行各业，从电动汽车（EV）充电器，到变速电机驱动，加热，通风和空调（HVAC）系统等，其中70%以上的生产能量通过利用这些设备转移和转换。本研究项目引入了可扩展电力电子变换器技术的新概念。这种新方法允许集成增强的高功率密度和高效率混合宽带隙（WBG）为基础的多电平电力电子转换器配置，增加了它的灵活性，允许提高整个功率转换系统的额定功率和弹性。此外，几个变流器的适当并联需要特殊的控制和调制技术，以消除或减轻循环电流和逆变器之间的平均功率分配。并联逆变器需要新颖的控制技术和调制方法，以提供快速的瞬态响应，并联逆变器之间的均匀功率共享，最大限度地减少循环电流，从而确保可靠，灵活和冗余控制。因此，本研究项目的目的可以概括如下。首先，开发一种完全工业化的高功率密度和高效率的基于三相混合WBG的多电平电力电子变换器电池（MPECC），包括所有无源和有源元件，体积功率密度高于4 kW/dm3，效率高于98.5%。然后，将开发一种可扩展的模块化双向背靠背多电平转换器，该转换器包含两种不同的mpec并联配置。

Power electronic converters (PECs) are a prevalent and most efficient technology for AC to DC power conversion and vice versa. They are used in every industry, from electric vehicle (EV) chargers, to variable-speed motor drives, heating, ventilation, and air conditioning (HVAC) systems, and so on where more than 70% of the produced energy transferred and converted by utilizing these devices. This research project introduces new concept of scalable power electronic converters technology. This new approach allows for integrating enhanced high power density and high efficiency hybrid wide bandgap (WBG) based multilevel power electronic converter configurations adding to it the flexibility which permit to increase the power rating and resiliency of the overall power conversion system. Moreover, proper paralleling of several converters necessitates special control and modulation techniques to eliminate or mitigate circulating current and equal power sharing between inverters. Novel control techniques and modulation methods for paralleled inverters for providing fast transient response, equal power sharing between the paralleled inverters, minimizing circulating current, ensuring therefore reliable, flexible, and redundant control are required. Accordingly, the objective of this research project can be summarized as follows. First, a fully industrial high-power density and high efficiency three-phase hybrid WBG based multilevel power electronic converter cell (MPECC) including all passive and active components with volumetric power density higher than 4 kW/dm3 and efficiency higher than 98.5% will be developed. Then, a scalable modular bidirectional back-to-back multilevel converter comprising two different parallel configurations of MPECCs will be developed.