高性能功率变换器DC-Link电容模组关键技术研究

新型半导体材料和器件的突破，加速了高性能功率变换器的研究和发展，同时，对变换器中体积大、可靠性低的DC-link电容模组提出了新的需求和挑战。本项目针对高性能功率变换器，提出一套考虑多种运行工况（稳态、动态和故障等）的DC-link电容参数分析和设计方法；针对DC-link电容模组，通过揭示模组中电、热、磁之间的耦合机理，提出DC-link电容模组的多物理场耦合模型；通过优化布局走线和散热设计构造DC-link电容模组方案；并建立效率、功率密度、可靠性和成本模型，对电容模组性能进行评估，优化DC-link电容模组设计方案。本项目提出的电容模组选型方法、多物理场耦合模型和多目标优化设计流程，将为高性能功率变换器DC-link电容模组的规范化选型与设计提供强有力的科学指导和理论支撑。

The great breakthrough of the new semiconductor materials and devices accelerates the research and development of high-performance power converters, and also presents high performance requirements and challenges for the DC-link capacitor modules with large volume and low reliability. This project proposes a systematical analysis and design solutions of the DC-Link modules towards the high-performance power converter by considering the various working conditions, such as normal and abnormal operations. For the DC-link capacitor module solution, based on the electrical, thermal, and electromagnetic coupling effectiveness analysis, this project proposes a multi-physical coupling model for investigating the solutions (e.g., layout and heat dissipation) for smaller parasitic parameters and other better features. Moreover, the multi-objective evaluation and optimization of the DC-link capacitor module, in terms of efficiency, power density, reliability and cost, is also considered in this project. This research will provide a strong scientific guidance and theoretical foundation for both the academia and industry to design and optimize the DC-link capacitor module in high performance power electronic applications.