Direct drive model

The direct-drive permanent magnet wind turbine eliminates the heavy speed-increasing gearbox. The generator shaft is directly connected to the impeller shaft. The speed of the rotor changes with the wind speed, and the frequency of its alternating current also changes. The power electronic converter rectifies alternating current with variable frequency into direct current, and then inverts it into alternating current output with the same frequency as the grid.Its main components include: impeller blades, hub, pitch system, generator rotor, generator stator, yaw system, wind measurement system, bottom plate, tower, etc. Its advantages include strong grid compatibility, low maintenance cost, low noise, etc., but it is difficult to transport and hoist.