... Properties: No core, no hysteresis and cogging, low starting torque Wind generator motorXD-PSF400-type vertical ... magnet, Multi-polar, small gap, high power density, output power;5. Low-speed direct drive, no torque ripple;6. ... Compact, high-volume power ratio;7. Because no iron loss, low heat, temperature rise is small.Packaging ... phasewe can according purchaser's demand wind power alternator