Robert Koslover
Certified Consultant
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Posted:
4 years ago
15 gen 2021, 10:33 GMT-5
Updated:
4 years ago
15 gen 2021, 10:49 GMT-5
If I understand you correctly, you are saying that you want to use the measured value of an exterior magnetic flux density to infer the magnet's remanent flux density. (These are, of course, different quantities, but they are also related, so it makes sense to ask if one can be derived from measurements of the other.) In short, yes, you should be able to do that, especially (and most easily) if the magnet is sufficiently-uniformly magnetized. Also, make sure that your Comsol Multiphysics model is carefully prepared and that your experiments are carefully performed, with close attention to potential sources of confusion or errors in both. Note that you may be able to improve accuracy and confidence in your results if you sample the external magnetic flux density at many locations on and around your magnet, to compare to the model's predictions there. Also, if there are any non-removable magnetic materials (such as iron) involved in your experiment, that will add complications to your work. You might also want to look at the book, "Permanent Magnet Materials and their Application," by Peter Campbell.
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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
*If I understand you correctly*, you are saying that you want to use the *measured* value of an exterior magnetic flux density to *infer* the magnet's remanent flux density. (These are, of course, *different* quantities, but they are also *related,* so it makes sense to ask if one can be derived from measurements of the other.) In short, yes, you should be able to do that, especially (and most easily) if the magnet is sufficiently-uniformly magnetized. Also, make sure that your Comsol Multiphysics model is carefully prepared *and* that your experiments are carefully performed, with close attention to potential sources of confusion or errors in *both.* Note that you may be able to improve accuracy and confidence in your results if you sample the external magnetic flux density at *many* locations on and around your magnet, to compare to the model's predictions there. Also, if there are any non-removable magnetic materials (such as iron) involved in your experiment, that will add complications to your work. You might also want to look at the book, "Permanent Magnet Materials and their Application," by Peter Campbell.