What motor controls the wind power control, stepping or DC servo? Ask an expert to tell me, thank you!

The fan control unit (WPCU) is the control core of each fan, which is distributed in the tower and engine room of the fan. Due to the harsh operating environment of the wind turbine, the reliability of the control system is very high, and the WPCS wind power control system is specially designed for the operating requirements of large-scale wind farms, which has the characteristics of strong environmental adaptability and anti-electromagnetic interference, so the wind power control is still controlled by AC motors.