Rotating machine provided with stator core

摘要

A recording disk is to be mounted on a hub. A base rotatably supports the hub through a bearing. A stator core is fixed to the base and includes an annular portion and a salient pole extending radially therefrom. A magnet faces the salient pole radially and is rotated with the hub. The magnet has a plurality of magnetic poles in the circumferential direction such that each of the plurality of magnetic poles faces the salient pole. The salient pole includes a rod-shaped body around which a wire is wound and a tooth portion that is provided radially outside the rod-shaped body and extends circumferentially. The circumferential end located at the end in the circumferential direction of the tooth portion is located radially inside a circumscribed circle passing through the tip located at the radially outermost end of the tooth portion.

主权项

1. A rotating machine comprising:
a hub on which a recording disk is to be mounted; a base configured to rotatably support the hub through a bearing; a stator core that is fixed to the base and includes an annular portion and a salient pole radially extending from the annular portion; and a magnet that faces the salient pole radially and is rotated with the hub, wherein the magnet has a plurality of magnetic poles in a circumferential direction such that each of the plurality of magnetic poles faces the salient poles, wherein the salient pole includes a rod-shaped body around which a wire is wound and a tooth portion that is provided radially outside the rod-shaped body and extends circumferentially, wherein a circumferential end located at the end in the circumferential direction of the tooth portion is located radially inside a circumscribed circle passing through a tip located at a radially outermost end of the tooth portion, and wherein a diameter of the circumscribed circle passing through the tip is D1, a diameter of an inscribed circle passing through an inner circumference of the circumferential end is D2, a diameter of an outer circumference of the magnet is D3, and a diameter of an inner circumference of the magnet is D4, such that:
(D3−D4)/3