... rotate speed to adjust blade angle at optimum TSR, run in high efficiency; over rated wind speed, wind ... ; 3-25m/s wind speed, wind turbine can run smoothly.3. Direct drive permanent magnet generator, low ... speed to adjust blade angle at optimum TSR, run in high efficiency; over rated wind speed, wind ... ; 3-25m/s wind speed, wind turbine can run smoothly.3. Direct drive permanent magnet generator, low ...