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Ask an Expert Forum How do I calculate/estimate heat generation in an inductor based on information available in the spec sheet?
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  • inductor
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How do I calculate/estimate heat generation in an inductor based on information available in the spec sheet?

JR2
JR2 2 months ago

I'm new here - don't know if this is the right place to post a question (sorry!).  I saw the Element14 vid on inductors.  (very good!).  It mentioned heat generation through DC resistance, AC resistance/skin effect, and core losses.  The DC resistance calculation is easy enough.  Is there a good way to calculate the other losses (based on frequency and current ) if you have the inductor spec sheet?  Thanks!

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  • Gough Lui
    Gough Lui 2 months ago +2
    Some companies provide online simulation services or active datasheets for their products. Wurth Elektronik comes to mind. You might be able to use those services to find out the phase angle or Q factor…
  • shabaz
    shabaz 2 months ago +1
    Hi, There's many variables, and inaccuracies. Often you'd go by the recommended applications on the datasheet, for instance, some will suggest a frequency range of operation, and the intended purpose…
  • dougw
    dougw 1 month ago +1
    Not a "good" way..... https://core.ac.uk/download/pdf/41822519.pdf https://upcommons.upc.edu/bitstream/handle/2117/77125/calculation_of_the_ac.pdf
  • shabaz
    0 shabaz 2 months ago

    Hi,

    There's many variables, and inaccuracies. Often you'd go by the recommended applications on the datasheet, for instance, some will suggest a frequency range of operation, and the intended purpose (e.g. a choke). Once you've picked one, you'd measure it instead of calculate it. Either in-circuit, or out-of-circuit. If you're doing it out-of-circuit then an LCR meter would/could be the right tool depending on what the intended frequency of operation is. If you're measuring in-circuit during operation, then you could just use a thermocouple.

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  • Gough Lui
    0 Gough Lui 2 months ago

    Some companies provide online simulation services or active datasheets for their products. Wurth Elektronik comes to mind. You might be able to use those services to find out the phase angle or Q factor at a given frequency as a guide.

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  • dougw
    0 dougw 1 month ago

    Not a "good" way.....

    https://core.ac.uk/download/pdf/41822519.pdf

    https://upcommons.upc.edu/bitstream/handle/2117/77125/calculation_of_the_ac.pdf

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  • JR2
    0 JR2 1 month ago

    Thanks everyone1  I used an online calc tool from Coilcraft!

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