Cooling Fan Having a Radial-Air-Gap Motor and a Method for Determining the Dimensional Proportion of the Motor
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United States of America Patent
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Issued Date -
Oct 2, 2014
app pub date -
Feb 7, 2014
filing date -
Mar 26, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A cooling fan having a radial-air-gap motor is disclosed. The cooling fan includes a fan frame, an impeller and a stator assembly. The fan frame has a shaft-coupling portion. The impeller has a hub, a shaft and a plurality of blades. The blades are arranged on an outer periphery of the hub. At least one magnetic element is arranged on an inner periphery of the hub. There is a height between a bottom face of the shaft-coupling portion and a top face of the hub. There is a maximum thickness between the bottommost and uppermost faces of the magnetic plate unit. A ratio of the maximum thickness to the height is between 0.1 and 0.6. A method for determining the dimensional proportion of the motor is also disclosed. The method selects a ratio of a maximum thickness to a height as 0.1 to 0.6.
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