Harmonic Loss Calculation in Rotor Surface Permanent Magnets—New Analytic Approach

General Analytical Model of Magnet Average Eddy-Current Volume Losses for Comparison of Multiphase PM Machines With Concentrated Winding

“…Another calculation point of view is presented in few papers depending on traditional eddy-current elementary paths division [12]- [13]. Thus, simple models of magnet volume losses are deduced but always without taking into account the various MMF spatial harmonic wavelengths that result from concentrated winding structure.…”

“…Therefore, by considering the same kind of calculation used in [12]- [13] the present paper is concerned by the following investigation: how wavelengths of MMF spatial harmonics in the air gap interact with rotor magnet pole dimensions, causing different levels of magnet losses?…”

Ferrites and Different Winding Types in Permanent Magnet Synchronous Motor

“…The losses in the PM have been calculated according to [10] and due their low values they have been neglected. The main reason is the high resistivity of ferrites and therefore the eddy currents and eddy current losses are negligible in ferrites PM.…”

Analytical model of magnet eddy-current volume losses in multi-phase PM machines with concentrated winding

“…Besides, the precision of results is depending on the degree of validity of assumptions used for the resolution of the equations. Another calculation point of view is presented in few papers depending on traditional eddy-current elementary paths division [8]- [9]. Thus, simple models of magnet volume losses are deduced but always without taking into account the various MMF spatial harmonic wavelengths that result from concentrated winding structure.…”