On test: Generators for wind turbines from The Switch Determination of the Generators' E?ciency To determine the e?ciency of the generators, a torque ?ange from HBM is installed into the shaft train as additional measuring system. The Finland-based company The Switch is a world leader in directly driven permanent magnet generators (PMG) for wind turbines with a power output of 1 MW up to 5 MW at medium to high rotational speeds. T o determine the e?ciency of the generators, a torque ?ange from HBM is installed into the shaft train as additional measuring system. Combined with special converters and monitoring and control systems the solutions o?ered by the company can be integrated into the drive train of wind turbines as complete packages. The PMGs o?ered by The Switch feature a special,

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