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Mission profiles and hygrothermal conditions: Its effects on the reliability of a soft switching converter
Microelectronics Reliability ( IF 1.6 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.microrel.2020.113707 Susana E. De León Aldaco , Hugo Calleja , Jesus Aguayo Alquicira
Microelectronics Reliability ( IF 1.6 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.microrel.2020.113707 Susana E. De León Aldaco , Hugo Calleja , Jesus Aguayo Alquicira
Abstract Reliability predictions are routinely performed according to mission profiles, in photovoltaic applications including at least irradiance and temperature. This paper is aimed at assessing the necessity of including humidity meteorological data in the mission profile. A DC/DC soft-switching converter rated at 1 kW, and aimed at PV applications is selected as case study. Its reliability is predicted using FIDES guide, using seasonal mission profiles for eight different sites with climates ranging from tropical-humid to hot and dry. The prediction results are contrasted, assuming that the most failure-prone converters are those at the highest temperature. The results corroborate that the thermal stress factor has a large impact on the increase in the failure rate of semiconductor devices. Nevertheless, humidity also has a noticeable impact on the failure rate, contributing with 30% in the transistors, with 6% in the diodes, and in minor proportion in the passive devices. The impact of humidity is larger when it occurs simultaneously with sustained, high temperatures, and it was found that neglecting humidity might underestimate the failure rate by as much as 35% in hot, humid sites. Therefore, detailed humidity meteorological data should be included in the mission profile.
中文翻译:
任务概况和湿热条件:它对软开关转换器可靠性的影响
摘要 可靠性预测通常根据任务概况进行,在光伏应用中,至少包括辐照度和温度。本文旨在评估在任务剖面中包含湿度气象数据的必要性。选择额定功率为 1 kW 且针对光伏应用的 DC/DC 软开关转换器作为案例研究。它的可靠性是使用 FIDES 指南预测的,使用八个不同地点的季节性任务概况,气候范围从热带潮湿到炎热干燥。假设最容易发生故障的转换器是那些温度最高的转换器,预测结果是对比的。结果证实,热应力因素对半导体器件故障率的增加有很大影响。尽管如此,湿度对故障率也有显着影响,晶体管占 30%,二极管占 6%,无源器件占较小比例。当湿度与持续的高温同时发生时,湿度的影响更大,并且发现在炎热潮湿的地方,忽略湿度可能会低估高达 35% 的故障率。因此,详细的湿度气象数据应包含在任务概况中。
更新日期:2020-08-01
中文翻译:
任务概况和湿热条件:它对软开关转换器可靠性的影响
摘要 可靠性预测通常根据任务概况进行,在光伏应用中,至少包括辐照度和温度。本文旨在评估在任务剖面中包含湿度气象数据的必要性。选择额定功率为 1 kW 且针对光伏应用的 DC/DC 软开关转换器作为案例研究。它的可靠性是使用 FIDES 指南预测的,使用八个不同地点的季节性任务概况,气候范围从热带潮湿到炎热干燥。假设最容易发生故障的转换器是那些温度最高的转换器,预测结果是对比的。结果证实,热应力因素对半导体器件故障率的增加有很大影响。尽管如此,湿度对故障率也有显着影响,晶体管占 30%,二极管占 6%,无源器件占较小比例。当湿度与持续的高温同时发生时,湿度的影响更大,并且发现在炎热潮湿的地方,忽略湿度可能会低估高达 35% 的故障率。因此,详细的湿度气象数据应包含在任务概况中。