Research on rotor magnet loss in fractional-slot concentrated-windings permanent magnet motor


Eddy current loss in rotor permanent magnet can cause magnet heating and even demagnetization. It is much worse in machines equipped with fractional-slot concentrated-windings (FSCW). The paper analyzes harmonics of magnetic flux in airgap, slot harmonics, spatial harmonics and temporal harmonics of the magneto-motive-force (MMF). The relationship between… (More)


13 Figures and Tables