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Post by KJ on Mar 26, 2015 7:04:57 GMT -6
I've began studying electricity recently so I can have a better understanding of the gears that I am using and I came across this question regarding tan delta value of a capacitor and it is driving me nuts. It seems that capacitance can change with frequency depending on the material used as its dielectric but I can't seem to find a good resource material on it... Also if the tan delta value of a capacitor is inversely proportional to the frequency of a signal how should I interpret this??  |
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Post by Ward on Mar 27, 2015 15:46:43 GMT -6
Are you also studying inverter designs? Capacitors can behave quite differently in that, ahem, capacity.
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Post by KJ on Mar 28, 2015 0:41:10 GMT -6
I've found some good reading materials on the topic. I will have a good read on them first before I ask any questions  |
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Post by Johnkenn on Mar 28, 2015 14:59:58 GMT -6
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Post by svart on Mar 28, 2015 21:16:38 GMT -6
Check out ESR and ESL in capacitors for the skinny on the characteristics of dielectric vs. Frequency.
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Post by svart on Mar 28, 2015 21:21:52 GMT -6
Also, different dielectric materials can change value over temperature and over voltage. Ceramic with poor tempco can drop as much as half their capacity. Tantalum gets too cold and can drop a good bit.
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