But the shift towards permanent-magnet generators (PMGs) is looking more certain. Even developers of hybrid reduced-gearing drivetrains are now rushing to integrate PMG technology into their designs.
PMGs promise drivetrains with greater efficiency and reliability, particularly under "partial load" — the state in which turbines usually operate. Compared with the currently dominant double-fed induction generators (DFIGs), PMGs have been shown to have efficiencies as high as 98% in gusty conditions and, in tests of a 2MW turbine, energy production yields 8.5%
