一种新的模拟方法来评估温度和辐射对SiC共振转换器可靠性的影响
Zhuowen Feng1, Pengyu Lai1, Abu Shahir Md Khalid Hasan1
1Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, USA.
Materials (Basel, Switzerland)
|January 28, 2026
概括
本研究引入了一种新的模拟方法,用于评估碳化 (SiC) 功率转换器的可靠性. SiC 设备显示出更好的热稳定性,但对辐射敏感,影响长期性能.
科学领域:
- 电力电子 电力电子 电力电子
- 材料科学 材料科学 材料科学
- 可靠性工程可靠性工程
背景情况:
- 碳化 (SiC) 功率转换器对于汽车和可再生能源等现代应用至关重要.
- 当前的可靠性评估往往侧重于设备或系统层面,忽视了综合方法.
- 对SiC电源设备和转换器进行综合性可靠性评估至关重要,但尚未得到充分研究.
研究的目的:
- 开发和介绍一种新的系统级模拟方法,用于评估SiC电源装置和共振转换器的可靠性.
- 分析不同温度和总电离剂量 (TID) 对SiC电源转换器性能的影响.
- 为了比较 (Si) 和基于SiC的功率转换器的可靠性,用于太空和恶劣环境应用.
主要方法:
- 校准温度敏感的电气参数 (TSEPs),如状态电阻 (RON) 和值电压转移 (ΔVTH),使用B1505A曲线追踪器.
- 开发了一个系统级模拟,将TSEP纳入300W共振转换器与增强电池的系统级模拟.
- 使用两个不同的模拟策略,在热和辐射压力 (TID) 下评估Si和SiC基转换器.
主要成果:
- C MOSFET表现出优越的热稳定性,在高温下由于高热导率而导致更一致的导电损失.
- 增加的总电离剂量 (TID) 对SiC器件的导电损失产生了负面影响,这表明在辐射下潜在的长期可靠性问题.
- 模拟强调了氧化物降解和ΔVTH转移作为影响SiC设备性能的关键因素.
结论:
- 拟议的综合模拟方法有效地评估SiC电源转换器在联合热和辐射应力下的可靠性.
- 碳技术在热管理方面提供了显著的优势,但需要仔细考虑辐射对太空和恶劣环境的影响.
- 进一步研究缓解TID诱导的降解对于提高SiC功率转换器的长期可靠性至关重要.
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