Thin and lightweight inner rotor motor and disk unit using the same
AssigneeAlps Electric Co., Ltd.
InventorTomokuni Wauke
Life of this patent
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Abstract
There are provided a rotor having plural magnetic poles disposed in a circumferential shape, and a stator including a stator core having plural magnetic pole teeth that are outside a circumference of the rotor and face the rotor, a coil being wound around each of the magnetic pole teeth, wherein the stator is provided in a range within 180 degrees with respect to a center of the rotor, the magnetic pole teeth are set so that the value of at least one of angles each formed by extensions of adjacent magnetic pole teeth is smaller than an angle formed by lines each connecting a tip center of one of adjacent magnetic pole teeth and a rotation center of the rotor.
Claims8
An inner rotor motor comprising:
- a rotor having plural magnetic poles disposed in a circumferential shape;
- and
- a stator including a stator core having plural magnetic pole teeth that are outside a circumference of the rotor and face the rotor, a coil being wound around each of the magnetic pole teeth,
- wherein the stator is provided so that a central angle of the rotor with respect to the stator is in a range within 180 degrees;
- and
- the magnetic pole teeth are set so that a first angle defined by extensions of the centerlines of two adjacent magnetic pole teeth is smaller than a second angle defined by lines each connecting a tip center of one of the adjacent magnetic pole teeth center of one of the adjacent magnetic pole teeth and a rotation center of the rotor.
Dependencies are inferred from the claim text.