LARGE DIAMETER FAN HAVING LOW PROFILE RADIAL AIR GAP MOTOR
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app pub date -
Jun 30, 2015
filing date -
Jun 30, 2014
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Abstract
An electric fan includes blades and an outer rotor motor for rotating the blades. The motor includes a rotor rotatable about an axis and a generally toroidal stator including a core and electrically conductive wiring wound about the core. The rotor is rotatable about an axis. The rotor includes a rotor can and a plurality of arcuately arranged magnets fixed relative to the can. The blades are mounted to the can. The core includes a yoke and a plurality of arcuately spaced apart teeth extending from the yoke. The teeth cooperatively present an outer radial margin of the core. Each of the magnets is spaced radially outwardly from the radial margin such that the core and the magnets cooperatively define a circumferentially extending radial gap therebetween. The motor defines at least ten poles. Each of the coils has an axial thickness of about 5 mm or less.
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