... Wind generator XD-PSF400-type vertical axis wind turbine Properties: No core, no hysteresis and cogging, low starting torque Wind generator motorXD-PSF400-type vertical axis wind turbine ... permanent 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, ...