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目前开关电源的预测与健康管理研究多基于某特定应力下的监测数据,其应力剖面固定,难以推广应用到应力随机组合的实际场合中。通过对所建立的高精度仿真模型中注入定量退化的方式,基于EDA技术开展了开关电源整体健康状态评估方法的研究。采用试验设计的方法,构建电源退化特征标准数据库,并采用最小二乘拟合方法,确定应力因素与系统输出的函数关系。进而可评估得到任意应力组合作用下电源的实际健康状态。某反激开关电源的实际健康状态评估结果表明了所提出的方法有效可用。
At present, the research on the prediction and health management of switching power supply is mostly based on the monitoring data under a certain stress. The stress profile is fixed and it is difficult to popularize and apply it to the practical occasions where the stress is randomly combined. By means of quantitative degeneration injected into the established high-precision simulation model, the research on the overall health assessment of switching power supply is carried out based on EDA technology. The experimental design method is used to construct a standard database of power degradation characteristics and the least square fitting method is used to determine the function of stress factors and system output. In turn, the actual health of the power supply can be evaluated for any stress combination. The actual health assessment of a flyback switching power supply shows that the proposed method is effective and available.