... | ... | @@ -6,4 +6,18 @@ The output of the script is a table (in text or OpenDocument spreadsheet formats |
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More details can be found on the project's [git repo](https://gitlab.cern.ch/cgentsos/extract_cap_voltage_rating).
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![screenshot](uploads/0089a2a68bbf61aa199588caae8f8032/screenshot.png) |
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![screenshot](uploads/0089a2a68bbf61aa199588caae8f8032/screenshot.png)
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# Derating of Different Capacitor Technologies
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Derating is the practice to either reduce the specific stress electronic components are exposed to during their operation or to increase the design strength towards this stress. In practical terms this means achieving a high ratio between the applied stress and the strength of the component to withstand that stress. For capacitors this is often times the applied voltage vs the rated voltage:
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*Derating factor = Applied Voltage/Rated Voltage*
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A variety of standards and literature exist specifying guidelines for maximum derating factors. For different capacitor technologies A. Birolini specifies in *Reliability Engineering - Theory and Practice, 2014, 7th ed.* the following derating factor limits:
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| **Type** | **Voltage** | **Internal Temperature** |
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| ------ | ------ | ------ |
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| Film, Ceramic | 0.5 | 0.5 |
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| Tantalum, solid | 0.5 | 0.5 |
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| Aluminium, wet | 0.8 | 0.5 | |