JPS59191878U

JPS59191878U - brushless motor

Info

Publication number: JPS59191878U
Application number: JP8650483U
Authority: JP
Inventors: 森井　義博; 浦川　隆男
Original assignee: 松下電器産業株式会社
Priority date: 1983-06-06
Filing date: 1983-06-06
Publication date: 1984-12-19

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のブラシレスモータの断面図、第　　　２
図は同マグネット部の拡大断面図、第３図は第２の従来
例のマグネット部の断面図、第４図は周波数発電機コイ
ルパターン図、第５図は本考案の実施例を示すブラシレ
スモータの断面図、第６図は同マグネット部の拡大断面
図、第７図は本考案の一第２の実施例を示すマグネット
部の断面図である。１・・・・・・回転軸、４・・・・・・ロータヨーク、
５・・・・・・マグネット、５ａ・・・・・・マグネッ
ト内周面、５ｂ・・・・・・マグネット端面、５ｂ′・
・・・・・第１のマグネット端面、５Ｃ・・・・・・副
マグネット、５ｄ・・・・・・主マグネット、５ｆ・・
・・・・第２のマグネット端面、６・・・・・・ステー
タヨーク、７・・・・・・ステータ巻線、８，９・・・
・・・ベアリング、１０・・・・・・ハウジング、１１
・・・・・・プリント基板、ｌｌａ・・・・・・周波数
発電機コイル、１２・・・・・・位置検出素子。第２図　　　　−第３図 ♀Ｖ賛ρ−召故仝４Ｑ第５図１且１第６図Figure 1 is a cross-sectional view of a conventional brushless motor, Figure 2
The figure is an enlarged sectional view of the same magnet part, Figure 3 is a sectional view of the second conventional magnet part, Figure 4 is a frequency generator coil pattern diagram, and Figure 5 is a brushless motor showing an embodiment of the present invention. FIG. 6 is an enlarged sectional view of the same magnet portion, and FIG. 7 is a sectional view of the magnet portion showing a second embodiment of the present invention. 1... Rotating shaft, 4... Rotor yoke,
5...Magnet, 5a...Inner peripheral surface of magnet, 5b...End face of magnet, 5b'.
...First magnet end face, 5C...Sub magnet, 5d...Main magnet, 5f...
...Second magnet end face, 6...Stator yoke, 7...Stator winding, 8, 9...
... Bearing, 10 ... Housing, 11
...Printed circuit board, lla...Frequency generator coil, 12...Position detection element. Fig. 2 - Fig. 3 ♀V praise - Summoning 4Q Fig. 5 1 and 1 Fig. 6

Claims

[Scope of utility model registration request]

(1) A rotor assembly including a drive magnet magnetized in a direction perpendicular to the rotation axis, a hollow cylindrical rotor yoke to which the drive magnet is fixed, and a rotation axis, and a rotor assembly having a predetermined gap in the radial direction with the drive magnet. a stator assembly having a stator yoke formed by winding stator windings arranged oppositely with each other, and a housing to which a bearing for fixing the stator assembly and rotatably supporting a rotating shaft is fixed; The end face of the magnet perpendicular to the rotation axis is composed of a first magnet end face and a second magnet end face having a concentric step in the radial direction with respect to the rotation axis, and the first magnet end face is arranged in the direction perpendicular to the rotation axis. protrudes from the second magnet end face in the direction of the rotation axis, and
A brushless motor having a plurality of magnetic poles magnetized in the direction of the rotation axis, and including a frequency generator for detecting rotation speed, which is disposed facing the first magnet end face with a predetermined gap in the direction of the rotation axis.

(2) A utility model registered as claimed in claim 1, which has a printed circuit board disposed facing the first magnet end face with a predetermined gap in the direction of the rotation axis, and a rotation speed detection coil on the printed circuit board. brushless motor.

(3) Request for registration of a utility model in which a plurality of magnetic poles are magnetized in the direction of the rotational axis on the end face of a second magnet, and a position detection element is provided facing the end face of the second magnet to detect the rotational position of the rotor assembly. The brushless motor according to the range 1 above.