Ventilation device with electromagnetic coupling
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United States of America Patent
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May 30, 2006
Grant Date -
Feb 26, 2004
app pub date -
Sep 21, 2001
filing date -
Sep 26, 2000
priority date (Note) -
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Abstract
Ventilation devices, in particular for electric motor drives regularly comprise a fan wheel (1), which is driven by a shaft via an electromagnetic induction coupling. In order to reduce the complexity of manufacture, a stack of magnetic sheets (2) is cast in the aluminum hub of the fan wheel (1). Thus, aluminum also assumes at the same time the function of a damper winding.
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