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Wind turbine generator

A wind turbine generator is an electrical machine making the conversion from mechanical energy to electrical energy in a wind turbine (see that word). The wind turbine generator  can be a DC voltage and current machine with brushes and rotary collector  or much more frequently an AC multiphase machine. There are 2 families of AC electrical wind turbine generators : the asynchronous ones whereas the frequencies of the rotor and stator magnetic fields generated by coils are not the same and the synchronous ones in the opposite case. The AC synchronous generators are also called alternators. The asynchronous AC generators are less used nowadays than the AC synchronous generators as wind turbine generators thanks to the lowest dimensions and higher efficiency allowed today by the use of permanent magnets in replacement of excitation coils of inductors at the rotor of AC synchronous generators. The ALXION STK alternators are AC 3-phase synchronous permanent magnet generators.

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