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US 8,912,703 B2Granted
Stator core and spindle motor including the same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsSong Bon Oh, Jong Ryeol Oh
Life of this patent
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Abstract
There is provided a stator core formed by stacking a plurality of single core sheets, each including a coreback having a central hole formed therein, a plurality of tooth parts extended from the coreback in a radial direction, and extension parts extended from the plurality of respective tooth parts in a circumferential direction, wherein at least one of the plurality of single core sheets includes through-holes formed therein in order to reduce cogging torque, the through-holes being formed in the extension parts.
Claims9
A stator core, comprising:
- a plurality of stacked single core sheets, each single core sheet including a coreback having a central hole formed therein, a plurality of tooth parts extended from the coreback in a radial direction, and extension parts extended from the plurality of respective tooth parts in a circumferential direction,
- wherein at least one of the plurality of single core sheets includes through-holes formed therein in order to reduce cogging torque, the through-holes being formed in the extension parts and being closed at one end, and
- wherein, among the plurality of single core sheets, an uppermost single core sheet closes the through-holes formed in the remainder single core sheets stacked therebelow.
A spindle motor comprising:
- a rotor part including a rotor hub having a magnet mounted on an inner surface thereof;
- and
- a stator part rotatably supporting the rotor part and including a stator core disposed to face the magnet,
- wherein the stator core is formed by stacking a plurality of single core sheets, each single core sheet including a coreback having a central hole formed therein, a plurality of tooth parts extended from the coreback in a radial direction, and extension parts extended from the plurality of respective tooth parts in a circumferential direction, and
- at least one of the plurality of single core sheets includes through-holes formed therein in order to reduce cogging torque, the through-holes being formed in the extension parts and being closed at one end, and
- among the plurality of single core sheets, an uppermost single core sheet closes the through-holes formed in the remainder single core sheets stacked therebelow.
3 more elements
Dependencies are inferred from the claim text.