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A permanent magnet synchronous generator is a generator where the excitation field is provided by a permanent magnet instead of a coil. The term synchronous refers here to the fact that the rotor and magnetic field rotate with the same speed, because the magnetic field is generated through a shaft-mounted permanent magnet mechanism, and current is induced into the stationary armature.
An advantage of a gearbox is that generators are typically designed to have the rotor rotating at a high speed within the stator. Direct drive wind turbines do not exhibit this feature. A disadvantage of a gearbox is reliability and failure rates. [4] An example of a wind turbine without a gearbox is the Enercon E82. [5]
The generator is brought up to approximate synchronous speed by supplying more energy to its shaft - for example, opening the valves on a steam turbine, opening the gates on a hydraulic turbine, or increasing the fuel rack setting on a diesel engine. The field of the generator is energized and the voltage at the terminals of the generator is ...
The rated power at 14 m/s is 2.5 kW (3.35 hp). [6] The AC output from the synchronous generator is rectified to DC, then inverted to AC at 230 V 50 Hz. [citation needed] Core International developed the turbine in the Netherlands with research input from the Delft University of Technology. [citation needed]
An example of a wind turbine, this 3 bladed turbine is the classic design of modern wind turbines Wind turbine components : 1-Foundation, 2-Connection to the electric grid, 3-Tower, 4-Access ladder, 5-Wind orientation control (Yaw control), 6-Nacelle, 7-Generator, 8-Anemometer, 9-Electric or Mechanical Brake, 10-Gearbox, 11-Rotor blade, 12-Blade pitch control, 13-Rotor hub
Alstom Wind (Spain) – subsidiary of General Electric since 2015; Enron Wind (now defunct) – wind-turbine manufacturing assets bought by General Electric in 2002; Fuji Heavy Industries (Japan) – the wind turbine business was acquired by Hitachi in 2012; Gamesa (Spain) NEG Micon (Spain) – was bought by Gamesa; NEG Micon – now part of Vestas