JPS62115773U

JPS62115773U -

Info

Publication number: JPS62115773U
Application number: JP248886U
Authority: JP
Priority date: 1986-01-10
Filing date: 1986-01-10
Publication date: 1987-07-23

Description

[Brief explanation of the drawing]

第１図は本考案の第１の実施例による円環状の
磁石の正面図、第２図は第２の実施例の磁石の正
面図、第３図は第３の実施例の磁石の正面図、第
４図は２相半波ブラシレスモータの基本的駆動回
路を示す回路図、第５図は第１の実施例の２相半
波ブラシレスモータの駆動を説明する要部の正面
図、第６図ａ，ｂ，ｃ，ｄはそのモータが回転し
てゆく状態を示す要部の正面図、第７図ａ，ｂは
第２の実施例の磁石を製造する方法および製品を
展開して示す断面図、第８図ａ，ｂはその磁石を
製造する他の方法および製品を展開して示す断面
図、第９図ａ，ｂは第３の実施例の磁石を製造す
る方法および製品を展開して示す断面図、第１０
図および第１１図は従来の一般の２相半波ブラシ
レスモータを示す断面図および要部の正面図であ
る。３……マグネツトロータ、４……円環状の磁石
、５Ａ，５Ｂ……偏平コイル、６……ヨーク、９
Ｎ，９Ｓ……磁極、１０……切欠き、１５……一
部。 Fig. 1 is a front view of an annular magnet according to the first embodiment of the present invention, Fig. 2 is a front view of the magnet of the second embodiment, and Fig. 3 is a front view of the magnet of the third embodiment. , FIG. 4 is a circuit diagram showing a basic drive circuit of a two-phase half-wave brushless motor, FIG. 5 is a front view of essential parts explaining the drive of the two-phase half-wave brushless motor of the first embodiment, and FIG. Figures a, b, c, and d are front views of the main parts showing the state in which the motor rotates, and Figures 7 a and b show the developed method and product for manufacturing the magnet of the second embodiment. 8a and 8b are cross-sectional views showing another method and product for manufacturing the magnet, and FIGS. 9a and b are sectional views showing the method and product for manufacturing the magnet of the third embodiment. 10th cross-sectional view shown as
This figure and FIG. 11 are a sectional view and a front view of essential parts of a conventional general two-phase half-wave brushless motor. 3... Magnetic rotor, 4... Annular magnet, 5A, 5B... Flat coil, 6... Yoke, 9
N, 9S...magnetic pole, 10...notch, 15...part.

Claims

[Claims for Utility Model Registration] (1) A magnetic rotor equipped with an annular magnet having a large number of magnetic poles, and two flat coils mounted on a yoke so as to face each other in the axial direction of the magnetic rotor. A two-phase half-wave brushless motor characterized in that the magnetic force at an end of each magnetic pole of the magnet is made different from other parts. (2) The two-phase half-wave brushless according to claim 1 of the utility model registration claim, characterized in that a notch is provided at the end of each magnetic pole of the magnet, and a portion where the magnetic force is weak is partially provided. motor. (3) The two-phase half-wave brushless motor according to claim 1, wherein a portion of weak magnetic force is provided by a magnetizer at the end of each magnetic pole of the magnet. (4) A utility model according to claim 1, characterized in that a magnetic material with a weak coercive force is used at the end of each magnetic pole of the magnet, and a portion with a weak magnetic force is partially provided. Two-phase half-wave brushless motor. (5) A utility model according to claim 1, characterized in that a magnetic material with a strong retaining magnet is used at the end of each magnetic pole of the magnet, and a portion with a strong magnetic force is partially provided. Two-phase half-wave brushless motor.