Eddy-current loss in permanent magnet(PM) is an important indicator to ensure the limit of temperature rise and the performance of PMs.The impact of the slot-pole combination,the length of air gap,the width of slop opening and the pole arc coefficient on eddy-current loss of PM under no-load and load conditions was analyzed based on the finite element method by designing a outer-rotor permanent magnet synchronous generator with surface-mounted PMs.In particular,the effect of harmonic component of current in...