JPH0518246B2 - - Google Patents
Info
- Publication number
- JPH0518246B2 JPH0518246B2 JP59126119A JP12611984A JPH0518246B2 JP H0518246 B2 JPH0518246 B2 JP H0518246B2 JP 59126119 A JP59126119 A JP 59126119A JP 12611984 A JP12611984 A JP 12611984A JP H0518246 B2 JPH0518246 B2 JP H0518246B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- magnetic
- solenoid
- coil
- field generating
- 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 - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/20—Electromagnets; Actuators including electromagnets without armatures
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はソレノイド型コイルを用いて磁界を発
生する装置に関するものである。更に詳しく述べ
れば、発生磁界を強化することを可能とした構造
を有する磁界発生装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device that generates a magnetic field using a solenoid type coil. More specifically, the present invention relates to a magnetic field generating device having a structure that makes it possible to strengthen the generated magnetic field.
（従来技術とその問題点）
表面に垂直な強い一軸性磁気異方性を有する磁
性材料薄片中に存在する磁気バブルを利用した磁
気バブル素子に於いては、通常磁気バブルを安定
に保持する目的のために、磁性材料薄片に垂直な
バブル保持磁界（以下バイアス磁界と呼称する）
が必要である。バイアス磁界を発生するには、永
久磁石を用いる方法やソレノイド型中空コイルを
用いる方法がよく知られている。特に、磁気バブ
ル素子の諸特性を測定・評価する際には、前記バ
イアス磁界を変化させることが重要である。従つ
てこの目的のためには、バイアス磁界の発生は、
印加する電流値で自由に強度が変えられるソレノ
イド型コイルを用いるのが一般的である。(Prior art and its problems) In magnetic bubble elements that utilize magnetic bubbles existing in a thin piece of magnetic material that has strong uniaxial magnetic anisotropy perpendicular to the surface, the purpose is usually to stably hold the magnetic bubbles. Therefore, the bubble holding magnetic field (hereinafter referred to as the bias magnetic field) perpendicular to the magnetic material flake
is necessary. To generate a bias magnetic field, methods using permanent magnets and methods using solenoid-type hollow coils are well known. In particular, when measuring and evaluating various characteristics of a magnetic bubble element, it is important to change the bias magnetic field. Therefore, for this purpose, the generation of the bias magnetic field is
It is common to use a solenoid type coil whose strength can be freely changed depending on the applied current value.
一方、磁気バブル素子、特に磁気バブルを情報
の担体として利用する磁気バブルメモリ素子で
は、情報の高密度化のために、用いる磁気バブル
の径を微小化することが行なわれてきた。磁気バ
ブルを微小化するに伴つて、一般にはその磁性材
料の飽和磁化Msを大きくする必要がある。飽和
磁化が大きくなると、これに従つて磁気バブルを
安定に保持するバイアス磁界も大きくなる。例え
ば、磁性材料として磁性ガーネツト膜を用いた場
合、磁気バブル直径が3μｍ程度のときはバイア
ス磁界としては、150Oe程度であつたのが、2μｍ
直径の磁気バブルを保持するバイアス磁界は約
250Oe、1μｍ直径に対しては350Oe程度必要とす
る。更に0.5μｍ直径の磁気バブルを安定に保持す
るには600Oe程度のバイアス磁界が必要となる。 On the other hand, in magnetic bubble devices, particularly magnetic bubble memory devices that utilize magnetic bubbles as information carriers, efforts have been made to reduce the diameter of the magnetic bubbles used in order to increase the density of information. As magnetic bubbles become smaller, it is generally necessary to increase the saturation magnetization Ms of the magnetic material. As the saturation magnetization increases, the bias magnetic field that stably holds the magnetic bubble also increases accordingly. For example, when a magnetic garnet film is used as the magnetic material, when the magnetic bubble diameter is about 3 μm, the bias magnetic field is about 150 Oe, but it becomes 2 μm.
The bias magnetic field that holds a magnetic bubble of diameter is approximately
250Oe, approximately 350Oe is required for 1μm diameter. Furthermore, a bias magnetic field of about 600 Oe is required to stably hold a magnetic bubble with a diameter of 0.5 μm.
この様に、微小磁気バブルを利用した磁気バブ
ル素子を評価するには、高いバイアス磁界が必要
とされる。高いバイアス磁界を発生するには、磁
界発生コイルに大きな電流を印加すれば良いが、
単純なコイルではコイルに発生するジユール熱は
電流値の自乗に比例するため、バイアス磁界の上
昇に伴い急激にコイルの温度が上昇し、安定に磁
気バブル素子の評価・測定が行なえなくなる欠点
を有している。 As described above, a high bias magnetic field is required to evaluate a magnetic bubble device using minute magnetic bubbles. To generate a high bias magnetic field, it is sufficient to apply a large current to the magnetic field generating coil, but
In a simple coil, the Joule heat generated in the coil is proportional to the square of the current value, so as the bias magnetic field increases, the temperature of the coil rises rapidly, making it impossible to stably evaluate and measure magnetic bubble elements. are doing.
（発明の目的）
本発明の目的は、上記の欠点を取り除くため、
ソレノイド型磁界発生コイルで発生する磁界の単
位電流当りの強度を大きくすることにより、同一
発生磁界に要する印加電流値を下げ、コイルの発
熱を抑制する磁界発生装置を提供することにあ
る。(Object of the invention) The object of the invention is to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide a magnetic field generating device which reduces the applied current value required for the same generated magnetic field and suppresses heat generation in the coil by increasing the strength per unit current of the magnetic field generated by a solenoid type magnetic field generating coil.
（発明の構成）
本発明による磁界発生装置の構成は、少なくと
も１つのソレノイド型磁界発生コイルを有し、該
ソレノイド型コイルの中心軸に平行な外側面及び
中心軸に垂直な一端面に軟磁性体材料からなる磁
気的に一体化した枠材を設けたことを特徴として
いる。(Structure of the Invention) The structure of the magnetic field generation device according to the present invention includes at least one solenoid-type magnetic field generation coil, and the outer surface parallel to the central axis and one end surface perpendicular to the central axis of the solenoid-type coil have a soft magnetic field. It is characterized by having a magnetically integrated frame made of body material.
（構成の詳細な説明）
本発明は、上述の構成をとることにより、従来
技術の欠点を解決した。本発明の原理は、ソレノ
イド型磁界発生コイルの外部に高透磁率軟磁性体
の枠材を設け、ソレノイドコイルの外部に広く分
散する筈の磁束を、高透磁率軟磁性体枠材に吸収
せしめ、ソレノイドの内部の磁界をその分強調す
ることにある。(Detailed Description of Configuration) The present invention solves the drawbacks of the prior art by adopting the above-described configuration. The principle of the present invention is to provide a frame material made of a soft magnetic material with high magnetic permeability outside a solenoid-type magnetic field generating coil, and to absorb the magnetic flux that would otherwise be widely dispersed outside the solenoid coil into the soft magnetic material material with high magnetic permeability material. , the purpose is to emphasize the magnetic field inside the solenoid accordingly.
（実施例）
以下に本発明の実施例を図面を用いて説明す
る。(Example) Examples of the present invention will be described below with reference to the drawings.
実施例 １
第１図を用いて本発明の第１の実施例を説明す
る。本実施例は、ソレノイド型磁界発生コイルを
２ケ、中心軸を共有せしめて対置したヘルムホル
ツ型磁界発生コイルに本発明を実施した場合であ
る。第１図は、このヘルムホルツ型磁界発生コイ
ルの中心軸を含む断面図を示すものである。１
ａ，１ｂは夫々ソレノイド型磁界発生コイルであ
り、互に間隙２０を隔てて中心軸を共有して対置
されている。間隙部２０には、垂直な磁界（Hz）
２１を印加すべき試料５が置かれている。Example 1 A first example of the present invention will be described with reference to FIG. This embodiment is a case in which the present invention is applied to a Helmholtz type magnetic field generating coil in which two solenoid type magnetic field generating coils are placed opposite each other so as to share a central axis. FIG. 1 shows a sectional view including the central axis of this Helmholtz magnetic field generating coil. 1
Numerals a and 1b are solenoid-type magnetic field generating coils, which are placed opposite each other with a gap 20 in between and sharing a central axis. A perpendicular magnetic field (Hz) is applied to the gap 20.
A sample 5 to which 21 is to be applied is placed.
いま、軟磁性フエライトで作られた中心に穴が
開いた皿状の枠材２ａ，２ｂを夫々ソレノイド型
コイル１ａ，１ｂの外側に設ける。ソレノイドコ
イルの寸法が、内径32mm、外径95mm、厚さが15mm
で、間隙の大きさが16mmの場合、肉厚３mmの
NiZn磁性フエライトの枠材２ａ，２ｂがあると、
これらがない場合に比べて、単位電流当り、約40
％強い磁界が発生することが判明した。換言すれ
ば、同じ磁界強度を得るには約40％少ない電流値
でよく、従つて消費電力は約半分になる。 Now, dish-shaped frame members 2a and 2b made of soft magnetic ferrite and having a hole in the center are provided outside the solenoid coils 1a and 1b, respectively. The dimensions of the solenoid coil are 32mm inner diameter, 95mm outer diameter, and 15mm thickness.
So, if the gap size is 16 mm, the wall thickness is 3 mm.
With frame materials 2a and 2b made of NiZn magnetic ferrite,
Approximately 40% per unit current compared to the case without these
% strong magnetic field was found to be generated. In other words, approximately 40% less current is required to obtain the same magnetic field strength, and power consumption is therefore approximately halved.
実施例 ２
第２図を用いて、第２の実施例を説明する。第
２図Ａの立体図に示す様に、本実施例では軟磁性
枠材として、２ａ及び２ｂの間隙部２０の一部を
磁気的に継いだ橋絡部２ｃを少なくとも１ケ所以
上有することが特徴的である。ソレノイド型コイ
ル１ａ及び１ｂは、第２図Ｂに示す様に夫々、枠
材の２ａ，２ｂ部に納まつている。枠材及びソレ
ノイド型コイルの中央には、試料観察用の空洞１
２が設けられている。Example 2 A second example will be described with reference to FIG. As shown in the three-dimensional view of FIG. 2A, in this embodiment, the soft magnetic frame material has at least one bridging portion 2c that magnetically connects a part of the gap portion 20 of 2a and 2b. It is characteristic. The solenoid type coils 1a and 1b are housed in portions 2a and 2b of the frame material, respectively, as shown in FIG. 2B. There is a cavity 1 for sample observation in the center of the frame material and solenoid coil.
2 is provided.
この枠材の橋絡部２ｃの存在により、コイル外
の磁束は皿に有効に還流されて、ソレノイドの中
空部の磁束密度は高くなる。橋絡部２ｃの大きさ
を、コイル外径の1/4となつたとき、単位電流当
り枠材のないときに比べて、約50％大きな磁界が
ソレノイド中央部に発生した。換言すれば、同じ
強度の発生磁界を得るには、1/1.5の電流ですみ、
このためにコイルでの消費電力は、（1/1.5）2即
ち、約40％に減少する。それだけ、本実施例の磁
界発生コイルを用いれば、容易に微小バブルを用
いた磁気バブル素子の特性評価が可能となる。 Due to the presence of the bridge portion 2c of the frame material, the magnetic flux outside the coil is effectively returned to the plate, and the magnetic flux density in the hollow part of the solenoid becomes high. When the size of the bridging portion 2c was set to 1/4 of the outer diameter of the coil, a magnetic field that was approximately 50% larger per unit current than when there was no frame material was generated at the center of the solenoid. In other words, to obtain a generated magnetic field of the same strength, only 1/1.5 of the current is needed.
Therefore, the power consumption in the coil is reduced to (1/1.5) 2 or about 40%. By using the magnetic field generating coil of this embodiment, it becomes possible to easily evaluate the characteristics of a magnetic bubble element using microbubbles.
実施例 ３
本実施例は、第３図に示すが如く試料５を出し
入れしやすくなるために、試料の片方のみにソレ
ノイド型コイル１ａ及び軟磁性枠材２ａを設けた
場合である。このとき、枠材２ａにはソレノイド
中空部に対応した穴は設けられていない。こうす
ることにより、ソレノイドコイル外の磁束の還流
は更に完全になる。試料５を置くステージ６を、
枠材と同じ材質の軟磁性材料で形成すると、この
高透磁率軟磁性体の鏡像効果により、実効的にソ
レノイドコイルの厚みが２倍に増加したと同様の
磁束分布が得られ、単一ソレノイドコイルの場合
に比べて、約２倍の磁界が発生する。即ち、同一
磁界強度を得るためには、約半分の電流でよく、
よつて消費電力的には1/4（25％）ですむ。Example 3 In this example, as shown in FIG. 3, a solenoid coil 1a and a soft magnetic frame member 2a are provided on only one side of the sample in order to make it easier to take in and take out the sample 5. At this time, the frame member 2a is not provided with a hole corresponding to the solenoid hollow part. By doing so, the circulation of the magnetic flux outside the solenoid coil becomes more complete. The stage 6 on which the sample 5 is placed is
When made of the same soft magnetic material as the frame material, due to the mirror image effect of this high permeability soft magnetic material, a magnetic flux distribution effectively equivalent to doubling the thickness of the solenoid coil can be obtained, and a single solenoid Approximately twice the magnetic field is generated compared to the case of a coil. In other words, to obtain the same magnetic field strength, approximately half the current is required.
Therefore, power consumption is only 1/4 (25%).
（発明の効果）
以上に述べた様に、本発明を用いれば、単位電
流あたりの発生磁界強度が大きく、従つて同じ磁
界強度では、コイル部分での消費電力の少ない磁
界発生装置が実現される。本発明の枠材としては
前述の高透磁率を有する磁性フエライトのみなら
ず、パーマロイの如き、高透磁率金属材料を用い
ても本発明の効果は容易に得られることは、その
原理からみて当然である。(Effects of the Invention) As described above, by using the present invention, the generated magnetic field strength per unit current is large, and therefore, for the same magnetic field strength, a magnetic field generating device can be realized that consumes less power in the coil portion. . It is obvious from the principle that the effects of the present invention can be easily obtained even when the frame material of the present invention is not only the above-mentioned magnetic ferrite having high magnetic permeability, but also a high magnetic permeability metal material such as permalloy. It is.
第１図から第３図は本発明の実施例を示す図で
ある。
図に於いて、１ａ，１ｂはソレノイド型磁界発
生コイル、２ａ，２ｂは高透磁率磁性材料よりな
る枠材、２ｃは枠材橋絡部、５は試料、６は試料
ステージ、１０，１１はソレノイド型磁界発生コ
イルの外側端面、１２はコイルの中空部、２０は
コイル間々隙部、２１ほ磁界を示す。
1 to 3 are diagrams showing embodiments of the present invention. In the figure, 1a and 1b are solenoid-type magnetic field generating coils, 2a and 2b are frame members made of high permeability magnetic material, 2c is a frame bridging portion, 5 is a sample, 6 is a sample stage, and 10 and 11 are frame members made of a high permeability magnetic material. The outer end face of the solenoid type magnetic field generating coil, 12 is the hollow part of the coil, 20 is the gap between the coils, and 21 is the magnetic field.
Claims (1)
ルを有し、該ソレノイド型コイルの中心軸に平行
な外側面及び中心軸に垂直な一端面に軟強磁性体
材料からなる磁気的に一体化した枠材を設けたこ
とを特徴とする磁界発生装置。 ２ ソレノイド型コイルの中心軸に垂直な端面を
覆う枠材の中心部に開孔を設けたことを特徴とす
る特許請求の範囲第１項記載の磁界発生装置。 ３ 外側面及び一端面を軟強磁性枠材で覆われた
第１及び第２のソレノイド型コイルを、中心軸を
共有しかつ枠材で覆われていない第二の端面を互
に向き合う様に対置せしめ、第１及び第２のコイ
ルの枠材を互に磁気的に接続せしめたことを特徴
とする特許請求の範囲第２項記載の磁界発生装
置。 ４ 枠材がフエライトである特許請求の範囲第１
項、第２項又は第３項記載の磁界発生装置。[Claims] 1. At least one solenoid-type magnetic field generating coil is provided, and the outer surface parallel to the central axis of the solenoid-type coil and one end surface perpendicular to the central axis are magnetically formed of a soft ferromagnetic material. A magnetic field generating device characterized by having an integrated frame material. 2. The magnetic field generating device according to claim 1, wherein an opening is provided in the center of the frame material that covers the end face perpendicular to the central axis of the solenoid coil. 3. First and second solenoid coils whose outer surfaces and one end surface are covered with a soft ferromagnetic frame material are arranged so that they share a central axis and have second end surfaces not covered with the frame material facing each other. 3. The magnetic field generating device according to claim 2, wherein the frame members of the first and second coils are placed opposite each other and are magnetically connected to each other. 4 Claim 1 in which the frame material is ferrite
2. The magnetic field generating device according to item 2, item 3, or item 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59126119A JPS615507A (en) | 1984-06-19 | 1984-06-19 | Generator for magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59126119A JPS615507A (en) | 1984-06-19 | 1984-06-19 | Generator for magnetic field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS615507A JPS615507A (en) | 1986-01-11 |
| JPH0518246B2 true JPH0518246B2 (en) | 1993-03-11 |
Family
ID=14927110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59126119A Granted JPS615507A (en) | 1984-06-19 | 1984-06-19 | Generator for magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS615507A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7558510B2 (en) * | 2020-09-01 | 2024-10-01 | Tdk株式会社 | Local demagnetization device |
-
1984
- 1984-06-19 JP JP59126119A patent/JPS615507A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS615507A (en) | 1986-01-11 |
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