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Demagnetization of N52 magnets in a Halbach configuration
Posted 11 août 2025, 12:45 UTC−4 Electromagnetics, General, Materials 1 Reply
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Hello,
I'm currently working on modeling the demagnetization of an array of N52 magnets in a cylindrical Halbach configuration using the AC/DC module. Currently I'm using the remnant magnetization model for the N52 magnets using COMSOL's materials library, but I am worried that with the field strengths being produced (well over 2 Tesla) that this system is operating far outside the linear regime for these magnets. I've attempted to model the magnets using the nonlinear permanent magnet model, with a B-H curve experimentally measured for the magnets supplied by the manufacturer, but running this simulation produces no field at all. Any help in modeling the non-linear behavior would be appreciated.
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I suggest you post your .mph file to the forum.
Note: If that file is too large, see the note below that says "Learn how to reduce MPH-file size."
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara