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首页> 外文期刊>Microelectronics & Reliability >A methodology to determine reliability issues in automotive SiC power modules combining 1D and 3D thermal simulations under driving cycle profiles
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A methodology to determine reliability issues in automotive SiC power modules combining 1D and 3D thermal simulations under driving cycle profiles

机译：确定汽车SiC电源模块中可靠性问题的方法，该方法结合了行驶周期曲线下的1D和3D热模拟

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摘要

Current environmental concerns and fuel scarcity are leading to the progressive introduction of Electric Vehicles (EV) in the global fleet vehicle population. This requires significant design and research efforts from scientific community and industry to provide reliable automotive electric propulsion systems. The power modules used for automotive traction inverters can be considered as central elements of such systems. As they are subject to high electro-thermal stress during operation, Design-for-Reliability (DfR) approaches should be adopted. Thus, accurate models for electro-thermal simulations are relevant since the early design stages. However, such simulations become highly time consuming and complex when accurate thermal characterization through standardized or real driving conditions needs to be provided. In this context, this work proposes a simulation methodology that combines real-time simulation for electro-thermal characterization of the whole EV propulsion system, using a 1D equivalent thermal impedance circuit, in conjunction with 3D FEM thermal simulation. In this way, an accurate thermal characterization of the power module under driving cycles with long duration (of hundreds of seconds) can be obtained without computing heavy 3D FEM simulations. The proposed procedure allows to simplify and speed up the early design stages while maintaining high accuracy in the results.
机译：当前的环境问题和燃料匮乏导致全球车队车辆中逐渐引入电动汽车（EV）。这需要科学界和工业界进行大量的设计和研究工作，以提供可靠的汽车电动推进系统。用于汽车牵引逆变器的电源模块可以视为此类系统的核心要素。由于它们在操作过程中会承受较高的电热应力，因此应采用可靠性设计（DfR）方法。因此，自早期设计阶段以来，用于电热仿真的准确模型就很重要。但是，当需要通过标准或实际驾驶条件提供准确的热特性时，此类仿真变得非常耗时且复杂。在此背景下，这项工作提出了一种仿真方法，该方法结合了实时仿真，可使用一维等效热阻抗电路结合整个3D FEM热仿真对整个EV推进系统进行电热特性表征。这样，无需计算繁琐的3D FEM仿真，即可获得持续时间长（数百秒）的行驶周期下功率模块的准确热特性。所建议的过程可以简化并加快早期设计阶段，同时保持结果的高精度。

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