... pitch controlled mechanism: 2m/s low wind speed startup; 3-12m/s wind speed, following wind rotor rotate speed to adjust blade ... control; 3-25m/s wind speed, wind turbine can run smoothly.3. Direct drive permanent magnet generator, low startup resistance moment, ... control; 3-25m/s wind speed, wind turbine can run smoothly.3. Direct drive permanent magnet generator, low startup resistance moment, ...