JPH0179380U - - Google Patents
Info
- Publication number
- JPH0179380U JPH0179380U JP1987174133U JP17413387U JPH0179380U JP H0179380 U JPH0179380 U JP H0179380U JP 1987174133 U JP1987174133 U JP 1987174133U JP 17413387 U JP17413387 U JP 17413387U JP H0179380 U JPH0179380 U JP H0179380U
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- stator
- magnet member
- magnetic
- gap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 239000011553 magnetic fluid Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Brushless Motors (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
第１図乃至第５図は本考案を磁気デイスク駆動
用のスピンドルモータに適用した一実施例を示し
たもので、第１図は要部の拡大縦断面図、第２図
は全体の縦断面図、第３図は磁石部材の着磁状態
を示す平面図、第４図は同縦断面図、第５図は同
底面図であり、第６図乃至第８図は本考案の他の
実施例を示したもので、第６図は第３図相当図、
第７図は第４図相当図、第８図は第５図相当図で
あり、そして第９図は従来例を示す第２図相当図
である。
図面中、１１は下軸受ブラケツト、１３は上軸
受ブラケツト、１５は電機子コイル、１６はステ
ータ、１７はロータ、２１は円筒回転体、２３は
界磁マグネツト、２５は磁性シール手段、２６は
磁性リング、２７は磁石部材、２８及び２９は磁
性リング、３０及び３１は磁性流体、３３は回転
検出用着磁部、３４は磁気検出素子である。
1 to 5 show an embodiment in which the present invention is applied to a spindle motor for driving a magnetic disk. 3 is a plan view showing the magnetized state of the magnet member, FIG. 4 is a longitudinal sectional view of the same, FIG. 5 is a bottom view of the same, and FIGS. 6 to 8 are other embodiments of the present invention. This shows an example, and Figure 6 is a diagram equivalent to Figure 3.
7 is a diagram equivalent to FIG. 4, FIG. 8 is a diagram equivalent to FIG. 5, and FIG. 9 is a diagram equivalent to FIG. 2 showing a conventional example. In the drawing, 11 is a lower bearing bracket, 13 is an upper bearing bracket, 15 is an armature coil, 16 is a stator, 17 is a rotor, 21 is a cylindrical rotating body, 23 is a field magnet, 25 is a magnetic sealing means, and 26 is a magnetic A ring, 27 is a magnet member, 28 and 29 are magnetic rings, 30 and 31 are magnetic fluids, 33 is a magnetized part for rotation detection, and 34 is a magnetic detection element.
Claims (1)
ルを備えたステータとを有し、前記ロータと前記
ステータとを、径方向に空隙を介し且つその空隙
が軸方向の一端側において開放するように対向配
置したものにおいて、前記ロータのうち前記空隙
の開放近傍に設けた磁石部材と、この磁石部材と
前記ステータ側との間に充填した磁性流体とから
磁性シール手段を構成し、前記磁石部材に回転検
出用着磁部を形成すると共に、前記電機子コイル
への通電制御のための磁気検出素子を、前記磁石
部材の回転検出用着磁部に対向させるように前記
ステータに固定したことを特徴とするブラシレス
モータ。 It has a rotor equipped with a field magnet and a stator equipped with an armature coil, and the rotor and the stator are opposed to each other with a gap in the radial direction and the gap is opened at one end in the axial direction. In the rotor, a magnetic sealing means is constituted by a magnet member provided in the vicinity of the opening of the air gap in the rotor, and a magnetic fluid filled between the magnet member and the stator side, A magnetic detection element that forms a detection magnetized section and controls energization of the armature coil is fixed to the stator so as to face the rotation detection magnetized section of the magnet member. brushless motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987174133U JPH0179380U (en) | 1987-11-13 | 1987-11-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987174133U JPH0179380U (en) | 1987-11-13 | 1987-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0179380U true JPH0179380U (en) | 1989-05-29 |
Family
ID=31466008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987174133U Pending JPH0179380U (en) | 1987-11-13 | 1987-11-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0179380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0210777U (en) * | 1988-06-29 | 1990-01-23 |
-
1987
- 1987-11-13 JP JP1987174133U patent/JPH0179380U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0210777U (en) * | 1988-06-29 | 1990-01-23 |
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