... turbine Properties: No core, no hysteresis and cogging, low starting torque Wind generator motorXD-PSF400-type vertical axis wind turbine Properties ... :1. No core, no hysteresis and cogging, low starting torque;2. No iron loss, high efficiency;3. Coreless unique ... gap, high power density, output power;5. Low-speed direct drive, no torque ripple;6. Compact, high-volume power ratio;7. Because ...