JPS60176206A - Radial direction bipolar magnet and manufacturing device thereof - Google Patents
Radial direction bipolar magnet and manufacturing device thereofInfo
- Publication number
- JPS60176206A JPS60176206A JP3145984A JP3145984A JPS60176206A JP S60176206 A JPS60176206 A JP S60176206A JP 3145984 A JP3145984 A JP 3145984A JP 3145984 A JP3145984 A JP 3145984A JP S60176206 A JPS60176206 A JP S60176206A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- cylindrical
- mold
- magnetic flux
- magnetization
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0231—Magnetic circuits with PM for power or force generation
- H01F7/0252—PM holding devices
- H01F7/0268—Magnetic cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Manufacture Of Motors, Generators (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明は径方向に磁極を持つ円筒状磁石及びその製造装
置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a cylindrical magnet having magnetic poles in the radial direction and an apparatus for manufacturing the same.
従来、この種の磁石は、第１図、第２図に示すような製
造装置によシつくられている。この装置は、非磁性体に
よる円筒状の金型１及び非磁性体の中芯２と上パンチ３
及び下パンチ４とで金型１内に充填された磁性粉末５を
円筒状にプレス成形する。そして、このプレス成形体に
のようにして径方向に磁化されたプレス成形体は焼成さ
れ、第６図に示すように、径方向に磁極を持つ円筒状径
方向２極磁石７が得られる。Conventionally, this type of magnet has been manufactured using manufacturing equipment as shown in FIGS. 1 and 2. This device consists of a cylindrical mold 1 made of non-magnetic material, a center core 2 of non-magnetic material, and an upper punch 3.
and a lower punch 4 to press-form the magnetic powder 5 filled in the mold 1 into a cylindrical shape. Then, the press-formed body magnetized in the radial direction as in this press-formed body is fired, and as shown in FIG. 6, a cylindrical radially bipolar magnet 7 having magnetic poles in the radial direction is obtained.
このようにして得られた磁石は磁化方向が平行であるた
め、外周磁束分布が第４図に曲線Ａで示すように正弦状
状となシ、磁石として使用する場合の総磁束が少々いと
いう欠点がある。Since the magnets obtained in this way have parallel magnetization directions, the outer circumferential magnetic flux distribution is sinusoidal as shown by curve A in Figure 4, and the total magnetic flux when used as a magnet is slightly low. There are drawbacks.
そこで２本発明は外周磁束分布を改良してよシ多くの総
磁束を得ることができる円筒状磁石及びその製造装置を
提供することを目的とする。Therefore, it is an object of the present invention to provide a cylindrical magnet and an apparatus for manufacturing the same, which can obtain a larger total magnetic flux by improving the peripheral magnetic flux distribution.
本発明は１円筒状金型とこの金型の中芯とこの金型内に
充填された磁性粉末をプレスする手段と金型内の磁性粉
末に対して金型の軸に直角な方向の磁場を与える手段と
を有する磁石製造装置において、上記中芯あるいは上記
中芯とこの中芯を間にして磁化方向に関して対向する上
記金型の一部とを強磁性体としたことを特徴とする。こ
の装置によれば、外周磁束分布が大幅に改良された円筒
状磁石が得られる。The present invention includes a cylindrical mold, a center core of the mold, a means for pressing the magnetic powder filled in the mold, and a magnetic field directed perpendicular to the axis of the mold against the magnetic powder in the mold. The magnet manufacturing apparatus is characterized in that the core or a portion of the mold that faces the core in the magnetization direction with the core in between is made of a ferromagnetic material. According to this device, a cylindrical magnet with significantly improved outer circumferential magnetic flux distribution can be obtained.
第５図を参照して本発明の第１の実施例を説明する。図
中、第２図と同じ部分については同番号を付している。A first embodiment of the present invention will be described with reference to FIG. In the figure, the same parts as in FIG. 2 are given the same numbers.
この実施例では、中芯２′が強磁性体でつくられている
。矢印は印加磁場の方向を示す。In this embodiment, the core 2' is made of ferromagnetic material. Arrows indicate the direction of the applied magnetic field.
この装置によれば、金型１内の磁性粉末５の磁束分布は
、中芯２′が強磁性体であることにより、中芯２′部に
集中する。この磁性粉末５を焼成して得られる円筒状径
方向２極磁石は。According to this device, the magnetic flux distribution of the magnetic powder 5 in the mold 1 is concentrated at the core 2' because the core 2' is a ferromagnetic material. A cylindrical radially bipolar magnet obtained by firing this magnetic powder 5 is as follows.
第６図に示すように、磁極に近い外周面において広い範
囲にわたって外周面に対して実質」二重直方向に磁化さ
れたものが得られる。このようにして得られた円筒状磁
石７′の外周磁束分布は第４図に曲線Ｂで示す通シであ
る。As shown in FIG. 6, the outer circumferential surface near the magnetic pole is magnetized over a wide range in substantially double directions perpendicular to the outer circumferential surface. The outer circumferential magnetic flux distribution of the cylindrical magnet 7' thus obtained is as shown by curve B in FIG.
第７図は本発明の他の実施例を示す。この実施例は、中
芯２′と金型１の一部、すなわち。FIG. 7 shows another embodiment of the invention. In this embodiment, the core 2' and a part of the mold 1 are used.
中芯２′を間にして磁化方向に関して対向する扇形の部
分１．１’ 、 １１’とを強磁性体でつくったもので
ある。厳密には、金型１に外周面側から切込みを設けて
、この切込みに強磁性体１１′を嵌着している。The fan-shaped portions 1.1' and 11', which face each other in the direction of magnetization with the center core 2' in between, are made of ferromagnetic material. Strictly speaking, a notch is provided in the mold 1 from the outer peripheral surface side, and the ferromagnetic material 11' is fitted into this notch.
なお、第４図の特性は外径１２岨、内径７闘。The characteristics shown in Figure 4 are an outer diameter of 12 mm and an inner diameter of 7 mm.
長さ１０闘の円筒状希土類永久磁石に対しての測定結果
を示す。そして、総磁束φ２の測定結果は、従来（第２
図）のものが２５５ｋＭｘＴであるのに対し２本発明（
第５図）のものが３００ｋＭｘＴと大幅に向上した。The measurement results for a cylindrical rare earth permanent magnet with a length of 10 mm are shown. The measurement result of the total magnetic flux φ2 is the same as that of the conventional (second
The one in the figure) is 255kMxT, while the two in the present invention (
(Fig. 5) was significantly improved to 300kMxT.
以下余白
〔発明の効果〕
以上説明してきたように１本発明によれば異方性の方向
を磁石の外周面に対して垂直方向にすることにより、従
来のものより多い総磁束を得ることができる。本発明に
よる磁石は、コアレスモータ等に組込むことにより、従
来のものより消費電力を少なくでき、よシ高能率のモー
タへの使用に最適である。また、従来のものより総磁束
が多いので、小型化を図ることができ。Margin below [Effects of the Invention] As explained above, according to the present invention, by making the direction of anisotropy perpendicular to the outer peripheral surface of the magnet, it is possible to obtain a total magnetic flux greater than that of the conventional method. can. By incorporating the magnet according to the present invention into a coreless motor or the like, it can consume less power than conventional magnets, making it ideal for use in highly efficient motors. In addition, since the total magnetic flux is greater than that of conventional products, it is possible to reduce the size.
かつ小型化により安価な磁石を提供でき、産業上寄与す
る効果は太きい。In addition, the miniaturization makes it possible to provide inexpensive magnets, which has a significant industrial effect.
第１図は従来の磁石製造装置の縦断面図、第２図は第１
図のＡ−Ａ線断面図、第３図は従来の磁石の磁化方向を
説明するための図、第４図は従来例と本発明の一実施例
とを比較するための外周磁束分布図、第５図は本発明の
第１の実施例の横断面図、第６図は本発明により得られ
る磁石の磁化方向を説明するための図、第７図は本発明
の第２の実施例の横断面図。
図中、１は金型、２は中芯、３は上パンチ。
４は下パンチ、５は磁性粉末、６は電磁石、７は従来の
永久磁石、２′は強磁性体による中芯。
７′は本発明による永久磁石、１１′は強磁性体。
第１図
第３図
第４図
第６図Figure 1 is a vertical cross-sectional view of a conventional magnet manufacturing device, and Figure 2 is a vertical cross-sectional view of a conventional magnet manufacturing device.
3 is a diagram for explaining the magnetization direction of a conventional magnet, and FIG. 4 is a peripheral magnetic flux distribution diagram for comparing the conventional example and an embodiment of the present invention. FIG. 5 is a cross-sectional view of the first embodiment of the present invention, FIG. 6 is a diagram for explaining the magnetization direction of the magnet obtained by the present invention, and FIG. 7 is a cross-sectional view of the second embodiment of the present invention. Cross section. In the figure, 1 is the mold, 2 is the center core, and 3 is the upper punch. 4 is a lower punch, 5 is magnetic powder, 6 is an electromagnet, 7 is a conventional permanent magnet, and 2' is a center core made of ferromagnetic material. 7' is a permanent magnet according to the present invention, and 11' is a ferromagnetic material. Figure 1 Figure 3 Figure 4 Figure 6
Claims (1)
周辺の磁化方向が該磁石の外周面に対して実質上垂直に
されていることを特徴とする径方向２極磁石。 ２、円筒状金型と該金型の中芯と該金型内に充填された
磁性粉末をプレスする手段と該金型内の磁性粉末に対し
て該金型の軸に直角な方向の磁場を与える手段とを有す
る磁石製造装置において、上記中芯又は上記中芯と該中
芯を間にして磁化方向に関して対向する上記金型の一部
とを強磁性体としたことを特徴とする磁石製造装置。[Claims] 1. A cylindrical magnet having magnetic poles in the radial direction, characterized in that the direction of magnetization around the magnetic poles is substantially perpendicular to the outer peripheral surface of the magnet. magnet. 2. A cylindrical mold, a center core of the mold, a means for pressing the magnetic powder filled in the mold, and a magnetic field in a direction perpendicular to the axis of the mold against the magnetic powder in the mold. A magnet manufacturing apparatus having a means for providing a magnet, characterized in that the core or a part of the mold that faces the core in the direction of magnetization with the core in between is made of a ferromagnetic material. Manufacturing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3145984A JPS60176206A (en) | 1984-02-23 | 1984-02-23 | Radial direction bipolar magnet and manufacturing device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3145984A JPS60176206A (en) | 1984-02-23 | 1984-02-23 | Radial direction bipolar magnet and manufacturing device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60176206A true JPS60176206A (en) | 1985-09-10 |
Family
ID=12331841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3145984A Pending JPS60176206A (en) | 1984-02-23 | 1984-02-23 | Radial direction bipolar magnet and manufacturing device thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60176206A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02128233A (en) * | 1988-11-09 | 1990-05-16 | Nec Corp | Fault processor |
| JP2016154426A (en) * | 2015-02-20 | 2016-08-25 | 日立アプライアンス株式会社 | Motor-fan using a magnetically anisotropic magnet, and vacuum cleaner |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5226498A (en) * | 1975-08-22 | 1977-02-28 | Seiko Epson Corp | Permanent magnet and its manufactured process |
-
1984
- 1984-02-23 JP JP3145984A patent/JPS60176206A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5226498A (en) * | 1975-08-22 | 1977-02-28 | Seiko Epson Corp | Permanent magnet and its manufactured process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02128233A (en) * | 1988-11-09 | 1990-05-16 | Nec Corp | Fault processor |
| JP2016154426A (en) * | 2015-02-20 | 2016-08-25 | 日立アプライアンス株式会社 | Motor-fan using a magnetically anisotropic magnet, and vacuum cleaner |
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