JPS6229767U

JPS6229767U -

Info

Publication number: JPS6229767U
Application number: JP12051985U
Authority: JP
Priority date: 1985-08-06
Filing date: 1985-08-06
Publication date: 1987-02-23

Description

[Brief explanation of the drawing]

第１図は乃至第３図は本考案の一実施例を示し
、第１図はブラシレスモータの断面図、第２図は
ロータヨークの斜視図、第３図はロータマグネツ
ト及び位置検出用マグネツトの底面図、第４図は
ロータ部と異なる検出素子の関係を示す説明図、
第５図は従来のブラシレスモータのロータ部の分
解斜視図である。５…ロータマグネツト、２…ロータヨーク、Ａ
…ロータ部、１２…駆動コイル、Ｂ…ステータ部
、４，４…切込部、６，６…位置検出用マグネツ
ト、８，８…磁気遮蔽板、２１…検出素子。 Figures 1 to 3 show an embodiment of the present invention, in which Figure 1 is a sectional view of a brushless motor, Figure 2 is a perspective view of a rotor yoke, and Figure 3 is a diagram of a rotor magnet and a position detection magnet. A bottom view, FIG. 4 is an explanatory diagram showing the relationship between the rotor part and different detection elements,
FIG. 5 is an exploded perspective view of the rotor section of a conventional brushless motor. 5...Rotor magnet, 2...Rotor yoke, A
...Rotor part, 12... Drive coil, B... Stator part, 4, 4... Notch part, 6, 6... Position detection magnet, 8, 8... Magnetic shielding plate, 21... Detection element.

Claims

[Claim for Utility Model Registration] A rotor magnet is provided on the inner peripheral surface of a dish-shaped rotor yoke having a rising peripheral edge covering the outer peripheral wall of the magnet to form a rotor portion, and a plurality of drive coils are attached. A brushless motor in which a stator portion is disposed opposite to the magnet with a gap therebetween, and a notch portion formed on a rising peripheral edge of the rotor yoke; and a stator portion disposed in the notch portion and integrally formed with the rotor magnet. a magnetic shielding plate inserted between the position detecting magnet and the rotor magnet and having a size that covers the notch from its inner surface; A brushless motor comprising: a detection element provided in the stator section;