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Gearless motor

01 Aug 2006

A GEARLESS 110 kW traction motor developed by Siemens is undergoing trials at the Wegberg-Wildenrath test facility, where it is fitted to a former München U-Bahn car.

Siemens claims an efficiency of 96% for the Syntegra permanent magnet synchronous drive. As it does not have gears it produces less noise than a geared motor, as well as offering the possibility of building bogies with a shorter wheelbase and thus lower weight.