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

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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0 shabaz over 3 years 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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0 Gough Lui over 3 years 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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0 dougw over 3 years 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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0 JR2 over 3 years ago

Thanks everyone1 I used an online calc tool from Coilcraft!
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