Designing of power electronics converters seldom considers multiscale coupling relationship between components and circuits. Although macroscale is computationally efficient, it barely contains the micro implications about aging, deterioration, transient performance, etc. Conversely, the microscale obtains multiple observation scope, however, with computational disaster. In this paper, the multiscale method is applied in the power electronic modeling which provides a qualitative methodology to combine the scales appropriately, and to obtain the dynamic response under the action of multiphysics accurately. Firstly, the concept of multiscale and the scale division of power electronic system are expounded. Considered the dynamic behavior of components and converters with different complexity, the framework of multiscale converters and modeling method is proposed. Afterwards, a scalable coupling separation method is presented, providing interfaces for the multiphysics and dielectric physics. Additionally, a multiscale conversion algorithm considering both efficiency and accuracy is designed. In the end, a DC/DC converter is taken for the verification. The feasibility and advantages of multiscale method and conversion algorithm have been demonstrated in accuracy, consistency and multiple analysis. By filling in the microscale observation, it is plausible to provide theoretical guidance for reducing margin, accurate analysis and reliability estimation of electronic components.

中文翻译：

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基于宏观和微观描述的DC/DC变换器多尺度建模与分析

电力电子转换器的设计很少考虑元件和电路之间的多尺度耦合关系。宏观尺度虽然计算效率高，但几乎不包含老化、退化、瞬态性能等微观含义。相反，微观尺度获得多个观测范围，但存在计算灾难。本文将多尺度方法应用于电力电子建模，提供了一种定性的方法来适当地组合尺度，准确地获得多物理场作用下的动态响应。首先阐述了电力电子系统多尺度的概念和尺度划分。考虑了不同复杂度的组件和转换器的动态行为，提出了多尺度转换器的框架和建模方法。然后，提出了一种可扩展的耦合分离方法，为多物理场和介电物理场提供了接口。此外，还设计了一种兼顾效率和精度的多尺度转换算法。最后，采用 DC/DC 转换器进行验证。多尺度方法和转换算法的可行性和优势在准确性、一致性和多重分析方面得到了证明。通过填充微观观察，可以为电子元件的减小裕度、准确分析和可靠性估计提供理论指导。设计了一种兼顾效率和精度的多尺度转换算法。最后，采用 DC/DC 转换器进行验证。多尺度方法和转换算法的可行性和优势在准确性、一致性和多重分析方面得到了证明。通过填充微观观察，可为电子元件的减小裕度、准确分析和可靠性估计提供理论指导。设计了一种兼顾效率和精度的多尺度转换算法。最后，采用 DC/DC 转换器进行验证。多尺度方法和转换算法的可行性和优势在准确性、一致性和多重分析方面得到了证明。通过填充微观观察，可为电子元件的减小裕度、准确分析和可靠性估计提供理论指导。