1500kW Direct Drive Permanent Magnet Generator PMSG 690V for Offshore Wind This 1500kW direct drive permanent magnet generator is engineered for offshore and large onshore wind turbines. The 120-pole rotor operates at only 15rpm together with the hub, completely eliminating the gearbox and reducing the main shaft drive train from three heavy components down to one slow-speed electric machine. Key Features Gearbox-free drive train reduces tower head mass and maintenance costs