Motor having rotor equipped with cooling fan
AssigneeAsmo Co., Ltd.
InventorsYoshiaki Hayashi, Toshio Yamamoto
Life of this patent
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Abstract
A motor includes a rotatable shaft, a core secured to the rotatable shaft, a fan secured to the rotatable shaft, and a yoke containing the core and the fan. The core has a plurality of slots around which a coil is wound. The fan has a plurality of blades. The yoke has a plurality of vent holes that communicate an interior of the yoke with an exterior of the yoke. The plurality of the vent holes are arranged adjacent the fan. The number of slots, the number of blades and the number of vent holes are set such that these three numbers do not share a common divisor other than 1.
Claims20
A motor comprising:
- a rotatable shaft;
- a core secured to said rotatable shaft, said core having a plurality of slots around which a coil is wound;
- a fan secured to said rotatable shaft, said fan having a plurality of blades;
- and
- a yoke containing said core and said fan, said yoke having a plurality of vent holes that communicate an interior of said yoke with an exterior of said yoke, said plurality of said vent holes being arranged adjacent said fan, wherein:
- a number of said slots, a number of said blades and a number of said vent holes are set such that said number of said slots, said number of said blades and said number of said vent holes do not share a common divisor other than 1.
A motor comprising:
- a rotatable shaft;
- a core secured to said rotatable shaft, said core having a plurality of slots around which a coil is wound;
- a fan secured to said rotatable shaft, said fan having a plurality of blades;
- and
- a yoke containing said core and said fan, said yoke having a plurality of vent holes that communicate an interior of said yoke with an exterior of said yoke, said plurality of said vent holes being arranged adjacent said fan, wherein:
- a number of said slots and a number of said vent holes are set such that said number of said slots and said number of said vent holes do not share a common divisor other than 1.
A motor comprising:
- a rotatable shaft;
- a core secured to said rotatable shaft, said core having a plurality of slots around which a coil is wound;
- a fan secured to said rotatable shaft, said fan having a plurality of blades;
- and
- a yoke containing said core and said fan, said yoke having a plurality of vent holes that communicate an interior of said yoke with an exterior of said yoke, said plurality of said vent holes being arranged adjacent said fan, wherein:
- a number of said blades and a number of said vent holes are set such that said number of said blades and said number of said vent holes do not share a common divisor other than 1.
Dependencies are inferred from the claim text.