Hysteresis Losses on synchron motor

Hi All,

i desperately try to evaluating hysteresis loss in comsol way. there are a few commonly used formulas.

i think, the easiest is to measure the area enclosed by the hysteresis loop in a cycle Ahyst

Ph= f * integral [ H * dB ] --> but how about sekundare Loop ? see the attachment (hysteresis on the stator tooth)

there are two most common models Jiles-Atherton (JA) and Preisach model (PM)

to use JA parameters alpha, M, a, k and c should be identified for example bei conduct an experiment

PM is mathematical model of hystereses (very mathematic). i have difficulty to understand it and implement it in comsol.

-Steinmetz-Model (SM)

Phy/V = k * f^alpha * B^ß

this SM is more for pure periodich flux. k and ß can be calculate using PM. see B-curve (green line)

I have non-lin HB-Curve of the Softiron.

What is the best (accuracy, simple) way to evaluate hysteresis loss?

thank you in advance!

regards
akmal