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首页> 外文会议>Society for Machinery Failure Prevention Technology Meeting; 20050418-21; Virginia Beach,VA(US) >PHM/PROGNOSTICS FOR DC TO DC POWER CONVERTERS
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PHM/PROGNOSTICS FOR DC TO DC POWER CONVERTERS

机译：DC / DC电源转换器的PHM /预测

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摘要

An easily-adopted method of adding Prognostics/Health Management (PHM) to electronic systems is described. As an example, a PWM-type switching power supply was chosen for analysis in this paper, due to the ubiquitous nature of these Power Converters in Mil/Aero systems, and the criticality of their reliable performance.rnSwitch mode power supplies (SMPS) provide significant advantages to users in terms of conversion efficiency, weight, and size. According to Industry Analysts, over $7.7 Billion of SMPS Power Systems were produced worldwide in 2002. However, SMPS's have unique reliability issues when used within a system due to size constraints, heat dissipation and varying load conditions.rnThe internal components of a SMPS, including the Power Switch (MOSFET or IGBT), catch diode, capacitors, and magnetics are under repetitive stress conditions that contribute to elevated failure rates. Often the SMPS is considered the most vulnerable and weakest part of a system. Having an early warning of an impending failure, (through PHM), would be very useful information and critical to mission success.rnThe efficacy of applying PHM to a commercial, off-the-shelf power converter will be explored, and a proposed foundation for future extensions will be covered.
机译：描述了一种向电子系统添加预测/健康管理（PHM）的简便方法。例如，由于这些电源转换器在Mil / Aero系统中无处不在，并且它们具有可靠的性能，因此本文选择了PWM型开关电源进行分析。rn开关模式电源（SMPS）提供就转换效率，重量和尺寸而言，对用户而言具有明显的优势。根据行业分析师的说法，2002年全球SMPS电力系统的生产额超过77亿美元。但是，由于尺寸限制，散热和负载条件的变化，SMPS在系统内使用时存在独特的可靠性问题。rnSMPS的内部组件，包括电源开关（MOSFET或IGBT），捕获二极管，电容器和磁性元件处于重复应力条件下，会导致更高的故障率。通常，SMPS被认为是系统中最脆弱和最脆弱的部分。 （通过PHM）对即将发生的故障进行预警将是非常有用的信息，对于完成任务至关重要。rn将探讨将PHM应用于商用现货电源转换器的功效，并为将其应用作为基础将来的扩展将包括在内。

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