Wind turbine generator repair

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   The tip of these

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   blades moves at more

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   than 300 kilometers

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   per hour,

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   but the rotor turns

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   only 15 times a

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   minute.

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   So how do you

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   get electricity from

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    something so slow?

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    The wind pushes three

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    blades more than 50

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    meters long,

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    and each one turns

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    on its own axis

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    to catch only the

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    wind it needs.

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    Inside the nacelle,

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    the slow shaft enters

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    a step-up gearbox.

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    Here the gearbox does

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    the opposite of a

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    gas turbine.

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    It multiplies the

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    speed more than 100

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    times,

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    from 15 to about

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    1,700 revolutions.

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    That drives a

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    doubly-fed generator.

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    Its stator goes

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    straight to the grid,

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    and its rotor,

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    through slip rings,

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    connects to a

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    converter that handles

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    about a third of

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    the power.

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    That is how it

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    delivers 60 hertz,

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    even as the wind

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    changes.

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    Other designs drop the

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    gearbox.

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    A huge permanent

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    magnet generator,

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    with many poles,

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    turns as slowly as

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    the blades,

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    and a full converter

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    adjusts the frequency.

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    The generator puts out

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    690 volts,

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    and a transformer

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    steps up the voltage.

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    Every gust punishes

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    windings,

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    rings,

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    and bearings.

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    At TEMISA Power Gen,

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    we have serviced more

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    than 30 wind turbine

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    generators.

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    Get a quote at

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    temisapowergen.mx

Questions from plant owners