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Household Devices

Electric motors are the heart of washing machines, vacuum cleaners, food slicers, hair dryers and other electric kitchen and household devices. Electric current is transferred almost exclusively through systems of carbon brushes that have to meet quite different requirements depending on the different applications. This includes not only guaranteeing a long operating time at ever higher speeds, but also a noise level as low as possible and good radio interference suppression – a must in times of increasing use of mobile communication. To this end, the properties of the materials used have to be customized for the respective application as the requirements to be met for a washing machine having an infinitely variable spin-drying programme differ from those for a hair dryer or an electric food slicer. These requirements can always be met by means of the use of carbon brushes, whose properties vary to an essential degree depending on their thermal treatment or additives.

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