I’ve been making the assumption that the normal and intrinsic curves for AlNiCo magnets are (virtually) the same. I have never seen a second quadrant B/H curve for AlNiCo that has both (unless they are indeed one in the same). Properties for Hc and Hci are the same as listed in the data sheets. Is my assumption correct? And if so, why? When designing a motor in FEA with AlNiCo I’ve described the non-linear curve in the properties rather than just an Hc and relative permeability. Does this sound right? Not much call for AlNiCo in motors these days, coreless low inertia DC motors were always AlNiCo (very thick due to easy Demag).
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