... EfficiencyAt StallSpeedCurrentSpeedCurrentTorqueOutputEff.CurrentTorqueVr/minAr/minAg.cmW%Ag.cmFS-540SH-4753R6.4 CONST6,2000.695,1602.191929.7168.7313.7950FS-545SH-3167D12 ... Structure of Chengfang Motors2-pole statorSr ferrite permanent magnet3, 5, 7, 8, 9, 12,16 slots armatureSilicon-steel lamination with epoxy ...