The larger the fan, the longer the blade, the heavier the weight, and the slower the rotation. The blade of a 1.5 MW wind turbine weighs about 6 tons, which is 1.8 times that of a 0.75 MW wind turbine blade, but only rotates 18 times per minute, which is only 3/4 of that of a 0.75 MW wind turbine.
The speed of the fan blades also has a lot to do with the wind speed. The faster the wind speed, the faster the fan rotates. When the wind speed of a 1.5 MW wind turbine reaches 3 meters per second, it can increase the speed by turning the gear to drive the generator to generate electricity.