JPS6343919B2 - - Google Patents
Info
- Publication number
- JPS6343919B2 JPS6343919B2 JP56104106A JP10410681A JPS6343919B2 JP S6343919 B2 JPS6343919 B2 JP S6343919B2 JP 56104106 A JP56104106 A JP 56104106A JP 10410681 A JP10410681 A JP 10410681A JP S6343919 B2 JPS6343919 B2 JP S6343919B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnet
- magnetic shielding
- shielding
- magnet piece
- 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.)
- Expired
Links
- 230000005389 magnetism Effects 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
- H02K11/014—Shields associated with stationary parts, e.g. stator cores
- H02K11/0141—Shields associated with casings, enclosures or brackets
Description
【発明の詳細な説明】
本発明は、新規にして産業利用性多大な磁気シ
ールト装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic shielding device that is novel and has great industrial applicability.
元来、モータ等の如き磁気を使用する機器にお
いては、他機器に対する磁気の影響を防止する必
要があり、かかる場合においては、従来、第３図
に示す如く、各機器における磁気漏洩防止をする
必要がある方向に、機器用磁石１に近接対向して
磁気シールド用磁性体７を配設することは、既に
公知であるが、実際的には、該磁気シールド用磁
性体７には、その重量及び大きさの面において大
きな制約があり、従つて普遍的実用化にはほど遠
い現状である。 Originally, in devices that use magnetism such as motors, it is necessary to prevent the influence of magnetism on other devices, and in such cases, conventionally, magnetic leakage prevention measures are taken in each device as shown in Figure 3. It is already known that the magnetic material 7 for magnetic shielding is disposed in close opposition to the device magnet 1 in the required direction, but in practice, the magnetic material 7 for magnetic shielding is There are significant restrictions in terms of weight and size, and therefore, the current state of the art is far from universal practical use.
本発明は、如上の従来磁気シールド装置の問題
点を根本的に解決して、磁気もれを殆んど完全に
防止する軽量且つ簡便な装置を、極めて安価に提
供することを目的とする。 The object of the present invention is to fundamentally solve the problems of the conventional magnetic shielding device described above, and to provide a lightweight and simple device that almost completely prevents magnetic leakage at an extremely low cost.
次に本発明の構成を、基本的構成を示す第１図
及び１実施例を示す第２図について説明する。 Next, the structure of the present invention will be explained with reference to FIG. 1 showing the basic structure and FIG. 2 showing one embodiment.
１は、機器用磁石であつて、第２図は、直流ブ
ラシレスモータ２におけるロータ３の金属製カツ
プ体４内周面にリンダ状に添着され、以て、ステ
ータコイル５を巻装したステータコア６に対向せ
しめられている公知の態様を示す。 1 is a device magnet, and FIG. 2 shows a stator core 6 attached in a cylinder shape to the inner peripheral surface of a metal cup body 4 of a rotor 3 in a DC brushless motor 2, and with a stator coil 5 wound thereon. This figure shows a known embodiment in which the two are opposed to each other.
７は、機器用磁石１の磁気もれを防止するため
に、当該機器の磁気もれ防止を要する方向におい
て、機器用磁石１に近接対向して配設される磁気
シールド用磁性体であつて、鉄板が多用され、第
２図は、ブラケツト８に添着された態様を示す。 7 is a magnetic material for magnetic shielding disposed close to and facing the device magnet 1 in the direction in which magnetic leakage prevention of the device is required, in order to prevent magnetic leakage of the device magnet 1; , an iron plate is often used, and FIG. 2 shows an embodiment in which it is attached to a bracket 8.
９は、本発明の要部をなす磁気シールド用磁石
片であつて、前記磁気シールド用磁性体７におけ
る機器用磁石１に対向する面に貼着されるものと
する。而して、この場合において、該磁気シール
ド用磁石片９における機器用磁石対向面９１の磁
極及び磁性体当接面９２の磁極を、それぞれ機器
用磁石表面１０の磁極と同種及び異種になる如く
構成するものとする。 Reference numeral 9 denotes a magnetic shielding magnet piece, which is an important part of the present invention, and is attached to the surface of the magnetic shielding magnetic body 7 facing the device magnet 1. In this case, the magnetic poles of the device magnet facing surface 91 and the magnetic body abutting surface 92 of the magnetic shielding magnet piece 9 are of the same kind and different kind as the magnetic poles of the device magnet surface 10, respectively. shall be configured.
第１図及び第２図は、機器用磁石１の表面１０
の磁極をＳ極となし、之に対向するところの、磁
気シールド用磁石片９の機器用磁石対向面９１を
同種のＳ極となして、相互に斥力が作用する如く
すると共に、磁気シールド用磁石片９の磁性体当
接面９２をＮ極として、該Ｎ極により当接する磁
気シールド用磁性体７をＮ極に磁化して、以て機
器用磁石１よりする残留磁束を吸収する態様を示
す。 1 and 2 show the surface 10 of the device magnet 1.
The magnetic pole of the magnet piece 9 for magnetic shielding is made the S pole, and the device magnet facing surface 91 of the magnetic shielding magnet piece 9 is made the S pole of the same type so that repulsive forces act on each other. The magnetic body contacting surface 92 of the magnet piece 9 is set as the north pole, and the magnetic shielding magnetic body 7 that comes into contact with the north pole is magnetized to the north pole, thereby absorbing the residual magnetic flux from the device magnet 1. show.
磁気シールド用磁石片９の材質には限定がない
が、機器内配設の磁気シールド用磁性体７に貼着
される構成よりして、ゴム磁石とするのが最も効
果的である。 Although there is no limit to the material of the magnetic shielding magnet piece 9, it is most effective to use a rubber magnet since it is attached to the magnetic shielding magnetic body 7 disposed inside the device.
磁気シールド用磁石片９の厚みは、対応する磁
器用磁石１の磁気量及び磁気シールド用磁性体７
の厚み等に依て適宜決定されるが、本発明者の実
験によれば、後述の如く、極めて薄いもので以て
特段の効果を挙げることが出来る。 The thickness of the magnetic shielding magnet piece 9 is determined by the amount of magnetism of the corresponding ceramic magnet 1 and the magnetic material 7 for magnetic shielding.
Although it is determined appropriately depending on the thickness, etc., according to the experiments of the present inventors, as will be described later, it is possible to obtain a special effect even with an extremely thin material.
本発明装置においては、如上の構成により、ま
ず磁気シールド用磁石片９における機器用磁石対
向面９１の磁極と機器用磁石表面１０の磁極とが
同種であることよりして、両磁極間に斥力が作用
して、これによつて機器用磁石１の磁界が弱めら
れ、更に、機器用磁石表面１０と異種極性に磁化
される磁気シールド用磁性体７の異種磁束吸収力
により機器用磁石１の磁界を更に弱化せしめて、
依て以て機器用磁石１の外部への影響即ち磁気漏
れの現象を極めて効果的に解消するものである。 In the device of the present invention, with the above configuration, firstly, since the magnetic poles of the device magnet facing surface 91 of the magnetic shielding magnet piece 9 and the magnetic poles of the device magnet surface 10 are of the same type, there is a repulsive force between the two magnetic poles. acts, thereby weakening the magnetic field of the equipment magnet 1, and furthermore, the different magnetic flux absorption power of the magnetic shielding magnetic body 7 magnetized with different polarity than the equipment magnet surface 10 causes the equipment magnet 1 to weaken. By further weakening the magnetic field,
Therefore, the influence of the device magnet 1 on the outside, that is, the phenomenon of magnetic leakage, is extremely effectively eliminated.
本発明者の実験によれば、第２図に示す直流ブ
ラシレスモータで、ロータ内径ａが78mm、ロータ
全幅ｂが98mmの場合、１mmのゴム磁石を磁気シー
ルド用磁石片９として1.5mmの鉄板より成る磁気
シールド用磁性体７に貼着して実験したところ、
該第２図におけるｃ点の磁界は、0.3ガウスであ
り、前記磁気シールド用磁石片９の貼布がなき場
合のｃ点の磁界が10ガウスであつたのに対して、
特段の磁気シールド効果を示した。 According to the inventor's experiments, in the DC brushless motor shown in Fig. 2, when the rotor inner diameter a is 78 mm and the rotor total width b is 98 mm, a 1 mm rubber magnet is used as the magnetic shielding magnet piece 9 and a 1.5 mm iron plate is used. When an experiment was carried out by attaching it to the magnetic material 7 for magnetic shielding,
The magnetic field at point c in FIG. 2 was 0.3 Gauss, whereas the magnetic field at point c without the magnetic shielding magnet piece 9 was 10 Gauss.
It showed a special magnetic shielding effect.
更に、第２図に示すものと類似構造の直流ブラ
シレスモータで、ロータ内径が54mm、ロータ全幅
が72mmのもので、前記の場合と同様に、１mmのゴ
ム磁石を磁気シールド用磁石片９として、２mmの
鉄板より成る磁気シールド用磁性体７に貼着して
実験したところ、第２図におけるｃ点に相当する
部位の磁界は0.2ガウスであり、前記磁気シール
ド用磁石片９の貼布がなき場合の同個所の磁界が
８ガウスであつたのに対して、特段の効果が示さ
れた。 Furthermore, for a DC brushless motor with a structure similar to that shown in Fig. 2, with a rotor inner diameter of 54 mm and a rotor total width of 72 mm, a 1 mm rubber magnet was used as the magnetic shielding magnet piece 9 in the same manner as in the previous case. When an experiment was carried out by attaching the magnetic material 7 for magnetic shielding made of a 2 mm iron plate, the magnetic field at the part corresponding to point c in FIG. In contrast to the case where the magnetic field at the same location was 8 Gauss, a special effect was shown.
本発明装置は、上述の如く、磁極間の斥力と引
力とを巧みに利用し、その相乗効果により、磁気
シールド用磁性体７及び磁気シールド用磁石片９
共に極めて薄いもので以て、従来にその比を見な
い磁気シールド効果を挙げることができ、その実
用的効果は多大なものがある。 As described above, the device of the present invention skillfully utilizes the repulsion and attraction between the magnetic poles, and due to their synergistic effect, the magnetic material 7 for magnetic shielding and the magnet piece 9 for magnetic shielding
Both are extremely thin and have a magnetic shielding effect that has never been seen before, and their practical effects are enormous.
第１図は本発明装置の基本的構成を示す説明
図、第２図は本発明装置の１実施例を示す縦断説
明図、第３図は従来装置の説明図である。
図面中、１は機器用磁石、７は磁気シールド用
磁性体、９は磁気シールド用磁石片、９１は磁気
シールド用磁石片における機器用磁石対向面、９
２は磁気シールド用磁石片における磁性体当接
面、１０は機器用磁石表面である。
FIG. 1 is an explanatory diagram showing the basic configuration of the apparatus of the present invention, FIG. 2 is a vertical sectional explanatory diagram showing one embodiment of the apparatus of the present invention, and FIG. 3 is an explanatory diagram of a conventional apparatus. In the drawings, 1 is a device magnet, 7 is a magnetic shielding magnetic material, 9 is a magnetic shielding magnet piece, 91 is a surface of the magnetic shielding magnet piece that faces the device magnet, 9
2 is a magnetic contact surface of the magnetic shielding magnet piece, and 10 is the surface of the device magnet.
Claims (1)
に該機器用磁石に近接対向して配設された磁気シ
ールド用磁性体７における機器用磁石対向面に、
磁気シールド用磁石片９を貼着し、該磁気シール
ド用磁石片９における機器用磁石対向面９１の磁
極及び磁性体当接面９２の磁極を、それぞれ機器
用磁石表面１０の磁極と同種及び異種となる如く
して、前記同種磁極間の斥力及び機器用磁石表面
１０と同種極性に磁化される磁気シールド用磁性
体７の漏洩磁束吸収力により磁気をシールドする
如くして成る、磁気シールド装置。 ２ 磁気シールド用磁石片７がゴム磁石である、
特許請求の範囲第１項記載の磁気シールド装置。[Claims] 1. On the device magnet facing surface of the magnetic shielding magnetic body 7 disposed close to and facing the device magnet in order to prevent external leakage of the magnetism of the device magnet,
A magnetic shielding magnet piece 9 is pasted, and the magnetic poles of the device magnet facing surface 91 and the magnetic body contacting surface 92 of the magnetic shielding magnet piece 9 are of the same kind and different kind as the magnetic poles of the device magnet surface 10, respectively. A magnetic shielding device configured to shield magnetism by the repulsion between the magnetic poles of the same type and the leakage magnetic flux absorbing force of the magnetic shielding magnetic body 7 magnetized with the same polarity as the device magnet surface 10. 2. The magnetic shielding magnet piece 7 is a rubber magnet.
A magnetic shielding device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56104106A JPS586063A (en) | 1981-07-02 | 1981-07-02 | Magnetically shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56104106A JPS586063A (en) | 1981-07-02 | 1981-07-02 | Magnetically shielding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS586063A JPS586063A (en) | 1983-01-13 |
| JPS6343919B2 true JPS6343919B2 (en) | 1988-09-01 |
Family
ID=14371866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56104106A Granted JPS586063A (en) | 1981-07-02 | 1981-07-02 | Magnetically shielding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS586063A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH028541Y2 (en) * | 1985-03-08 | 1990-02-28 | ||
| JPH0717268Y2 (en) * | 1986-05-19 | 1995-04-19 | 日本電産株式会社 | Brushless motor |
-
1981
- 1981-07-02 JP JP56104106A patent/JPS586063A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS586063A (en) | 1983-01-13 |
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