JPS63191871U

JPS63191871U -

Info

Publication number: JPS63191871U
Application number: JP7930587U
Authority: JP
Priority date: 1987-05-26
Filing date: 1987-05-26
Publication date: 1988-12-09

Description

[Brief explanation of the drawing]

第１図は本考案の実施例の回転子の斜視図、第
２図は同上の断面図、第３図は同上の分解斜視図
、第４図は同上の全体の無刷子電動機の断面図、
第５図は同上の動作説明図、第６図は従来例の分
解斜視図、第７図は同上の動作説明図である。１はヨーク、３はセグメント磁石、４は板体、
５は鉄心、６はコイル、１０は駆動回路、Ｋは隙
間である。 FIG. 1 is a perspective view of a rotor according to an embodiment of the present invention, FIG. 2 is a sectional view of the same, FIG. 3 is an exploded perspective view of the same, and FIG. 4 is a sectional view of the entire brushless motor,
FIG. 5 is an explanatory view of the same operation as above, FIG. 6 is an exploded perspective view of the conventional example, and FIG. 7 is an explanatory view of the same operation. 1 is a yoke, 3 is a segment magnet, 4 is a plate,
5 is an iron core, 6 is a coil, 10 is a drive circuit, and K is a gap.

Claims

[Scope of utility model registration request]

A rotor is formed in which a plurality of segment magnets are arranged circumferentially on the inner peripheral surface of a cylindrical yoke, an iron core facing the segment magnets of the rotor and having at least two magnetic pole pieces protruding therefrom; In a brushless electric motor, a stator is formed by a coil that excites an iron core, and is provided with a position detection element that detects the position of the rotor, and a drive circuit that controls rotation of the rotor based on a signal from the position detection element. Segment magnets are arranged on the inner peripheral surface of the yoke with a predetermined gap in the rotation direction,
A brushless electric motor characterized in that an annular plate made of a magnetic material is disposed at an end of a yoke between a segment magnet and a position detection element.