JP2014212294A - Magnetic field generator - Google Patents
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Abstract
【課題】磁気回路の分解や組立を必要とせずに磁束密度を変化させ過渡磁場の発生を可能とする永久磁石を用いた磁場発生装置を提供する。【解決手段】永久磁石１、ヨーク２〜７、エアギャップ８、調整機構側ヨーク23〜26、調整機構側ギャップ28、同じ材料で厚さが異なる磁性体30ａ〜30ｃ、非磁性並進ステージ31で構成されており、非磁性並進ステージ31は図示の並進方向32ａの方向に並進可能にされている。そして非磁性並進ステージ31を図示の並進方向32ａに並進させることで、非磁性並進ステージ31上に配置された同じ材料で厚さが異なる磁性体30ａ〜30ｃが、調整機構側ギャップ28内に挿入されることにより磁束密度を変化させ過渡磁場を発生させる。【選択図】図１A magnetic field generation apparatus using a permanent magnet that can generate a transient magnetic field by changing a magnetic flux density without requiring disassembly or assembly of a magnetic circuit. SOLUTION: A permanent magnet 1, yokes 2 to 7, an air gap 8, adjustment mechanism side yokes 23 to 26, adjustment mechanism side gaps 28, magnetic materials 30 a to 30 c having the same material and different thicknesses, and a nonmagnetic translation stage 31. The non-magnetic translation stage 31 is configured to be able to translate in the direction of the translation direction 32a shown in the drawing. Then, by translating the nonmagnetic translation stage 31 in the illustrated translational direction 32a, magnetic bodies 30a to 30c of the same material and different thicknesses arranged on the nonmagnetic translation stage 31 are inserted into the adjustment mechanism side gap 28. As a result, the magnetic flux density is changed to generate a transient magnetic field. [Selection] Figure 1
Description
本発明は、磁気回路の分解や組立を必要とせずに磁束密度を変化させ過渡磁場の発生を可能とする永久磁石を用いた磁場発生装置に関する。 The present invention relates to a magnetic field generator using a permanent magnet that can generate a transient magnetic field by changing a magnetic flux density without requiring disassembly or assembly of a magnetic circuit.
図２５は、従来の磁場発生装置の構成を示す斜視図であり磁束は矢印が付された破線９のようになり、図２６は、図２５の等価磁気回路を示す図である。図２５において、従来の磁場発生装置は、永久磁石１、永久磁石が発生する磁束の経路となるヨーク２〜７、センサ等の測定物が挿入されるエアギャップ８で構成されている。 FIG. 25 is a perspective view showing the configuration of a conventional magnetic field generator, in which the magnetic flux is as shown by a broken line 9 with an arrow, and FIG. 26 is a diagram showing the equivalent magnetic circuit of FIG. In FIG. 25, the conventional magnetic field generator is composed of a permanent magnet 1, yokes 2 to 7 serving as a path of magnetic flux generated by the permanent magnet, and an air gap 8 into which a measurement object such as a sensor is inserted.
図２５及び図２６に示すような磁気回路で磁束密度を変化させようとすると、永久磁石１の起磁力10、ヨーク２〜７の磁気抵抗12〜17、エアギャップ８の磁気抵抗18のいずれかを変化させる必要がある。 When the magnetic flux density is changed by the magnetic circuit as shown in FIGS. 25 and 26, any one of the magnetomotive force 10 of the permanent magnet 1, the magnetic resistances 12 to 17 of the yokes 2 to 7, and the magnetic resistance 18 of the air gap 8 is selected. Need to change.
下記に示す特許文献１には、図２５のエアギャップ８に相当する空間に磁性体を配置し、エアギャップ８の磁気抵抗18を変化させることで磁束密度を変化させている。 In Patent Document 1 shown below, a magnetic material is arranged in a space corresponding to the air gap 8 in FIG. 25, and the magnetic flux density is changed by changing the magnetic resistance 18 of the air gap 8.
上記した特許文献１では、測定物を挿入するエアギャップ８に磁性体を配置するため、連続して磁束密度が変化する過渡磁場を発生させながら測定を行うことは困難であるという課題がある。また、他の磁束密度の変化方法として、永久磁石１そのものを変更し永久磁石の起磁力10を変更する方法、ヨーク２〜７の材料や断面積を変更して、ヨーク２〜７の磁気抵抗を変更する方法、エアギャップ８のギャップの幅を変更し磁気抵抗を変更する方法などが考えられる。 In the above-described Patent Document 1, since a magnetic body is arranged in the air gap 8 into which a measurement object is inserted, there is a problem that it is difficult to perform measurement while generating a transient magnetic field in which the magnetic flux density continuously changes. Further, as another method of changing the magnetic flux density, the permanent magnet 1 itself is changed to change the magnetomotive force 10 of the permanent magnet, the material and the cross-sectional area of the yokes 2 to 7 are changed, and the magnetic resistance of the yokes 2 to 7 is changed. And a method of changing the magnetic resistance by changing the gap width of the air gap 8.
しかしこれらの方法では、磁気回路の分解や組立が必要になるため、連続して磁束密度が変化するような過渡磁場を発生させることは困難である。また永久磁石１に外部磁場として逆向きの磁場を与え減磁する方法も考えられるが、外部磁場として逆向きの磁場を与え減磁する方法では、永久磁石１が減磁してしまう恐れがある。 However, these methods require disassembly and assembly of the magnetic circuit, and it is difficult to generate a transient magnetic field that continuously changes the magnetic flux density. A method of demagnetizing the permanent magnet 1 by applying a reverse magnetic field as an external magnetic field is also conceivable. However, in the method of demagnetizing by applying a reverse magnetic field as the external magnetic field, the permanent magnet 1 may be demagnetized. .
そこで本発明の目的は、磁気回路の分解や組立を必要とせずに磁束密度を変化させ過渡磁場の発生を可能とする永久磁石を用いた磁場発生装置を提供することである。 Accordingly, an object of the present invention is to provide a magnetic field generator using a permanent magnet that can generate a transient magnetic field by changing a magnetic flux density without requiring disassembly or assembly of a magnetic circuit.
上記した課題を解決するための本発明の第１の態様は、永久磁石、該永久磁石から発生する磁束の経路となる磁性体、該磁性体間にエアギャップを有し、該エアギャップに発生する磁束密度を用いる磁場発生装置において、
上記エアギャップを含まずに磁性体を用いたループ磁気回路を形成し、形成した上記ループ磁気回路の磁性体の一部分を磁性体ユニットとして磁気抵抗の異なる磁性体を直線状に配置し、該磁性体ユニットを並進させて上記エアギャップに発生する磁束密度を調整する調整機構を設けたことを特徴とする。
A first aspect of the present invention for solving the above-described problems is a permanent magnet, a magnetic material that serves as a path for magnetic flux generated from the permanent magnet, an air gap between the magnetic materials, and generated in the air gap. In the magnetic field generator using the magnetic flux density to
A loop magnetic circuit using a magnetic material without including the air gap is formed, and a part of the magnetic material of the formed loop magnetic circuit is used as a magnetic material unit, and magnetic materials having different magnetic resistances are linearly arranged. An adjustment mechanism for adjusting the magnetic flux density generated in the air gap by translating the body unit is provided.
また上記した課題を解決するための本発明の第２の態様は、永久磁石、該永久磁石から発生する磁束の経路となる磁性体、該磁性体間にエアギャップを有し、該エアギャップに発生する磁束密度を用いる磁場発生装置において、
上記エアギャップを含まずに磁性体を用いたループ磁気回路を形成し、形成した上記ループ磁気回路の磁性体の一部分に回転台上に磁気抵抗の異なる磁性体を配置した磁性体ユニットを可動してループ結合させて上記エアギャップに発生する磁束密度を調整する調整機構を設けたことを特徴とする。
In addition, a second aspect of the present invention for solving the above-described problem is that a permanent magnet, a magnetic body serving as a path for magnetic flux generated from the permanent magnet, an air gap between the magnetic bodies, and the air gap In the magnetic field generator using the generated magnetic flux density,
A loop magnetic circuit using a magnetic material without including the air gap is formed, and a magnetic material unit in which a magnetic material having a different magnetic resistance is arranged on a rotary table is partially moved in the magnetic material of the formed loop magnetic circuit. And an adjustment mechanism for adjusting the magnetic flux density generated in the air gap by loop coupling.
上記において、上記磁性体ユニットの磁性体を囲むようにコイルが配置され、上記エアギャップを含まずに上記磁性体を用いて構成したループ磁気回路から上記磁性体が離れるときのみ上記コイルの励磁を行い、上記磁性体を通過している磁束を打ち消すことを特徴とする。 In the above, the coil is disposed so as to surround the magnetic body of the magnetic body unit, and the coil is excited only when the magnetic body leaves the loop magnetic circuit configured using the magnetic body without including the air gap. And canceling out the magnetic flux passing through the magnetic body.
本発明によれば、磁性体ユニットを並進させることで、エアギャップの磁束密度を変化させることが可能になるため、永久磁石を用いた磁気回路で過渡磁場を発生させることが可能となる。 According to the present invention, it is possible to change the magnetic flux density of the air gap by translating the magnetic body unit, so that a transient magnetic field can be generated by a magnetic circuit using a permanent magnet.
また本発明によれば、回転台を回転させて磁性体を可動させることで、エアギャップの磁束密度を変化させることが可能になるため、永久磁石を用いた磁気回路で過渡磁場を発生させることが可能となる。 Further, according to the present invention, it is possible to change the magnetic flux density of the air gap by moving the magnetic body by rotating the turntable, so that a transient magnetic field can be generated by a magnetic circuit using a permanent magnet. Is possible.
以下、本発明の実施の形態について、詳細に説明する。
図１は、本発明の実施形態１に係る磁場発生装置の構成を示す斜視図である。図２は、本発明の実施形態１に係る磁場発生装置の構成を示す平面図である。図１及び図２に示される本発明の実施形態に係る磁場発生装置は、永久磁石１、ヨーク２〜７、エアギャップ８、調整機構側ヨーク23〜26、調整機構側ギャップ28、同じ材料で厚さが異なる磁性体30ａ〜30ｃ、非磁性並進ステージ31で構成されており、非磁性並進ステージ31は図示の並進方向32ａの方向に並進可能である。なお上記において従来構成と同じものには同じ番号を付与している。
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a perspective view showing a configuration of a magnetic field generator according to Embodiment 1 of the present invention. FIG. 2 is a plan view showing the configuration of the magnetic field generator according to Embodiment 1 of the present invention. The magnetic field generator according to the embodiment of the present invention shown in FIGS. 1 and 2 includes a permanent magnet 1, yokes 2 to 7, air gap 8, adjustment mechanism side yokes 23 to 26, adjustment mechanism side gap 28, and the same material. The magnetic bodies 30a to 30c having different thicknesses and a nonmagnetic translation stage 31 are configured, and the nonmagnetic translation stage 31 can translate in the direction of the translation direction 32a shown in the drawing. In addition, in the above, the same number is provided to the same thing as a conventional structure.
図３は、図１及び図２に示した本発明の実施形態１に係る磁場発生装置の等価磁気回路を示す図である。図１及び図２において非磁性並進ステージ31が図示の並進方向32ａの方向に並進することにより、調整機構側ギャップ28の磁気抵抗38(図３参照)が変化する。 FIG. 3 is a diagram showing an equivalent magnetic circuit of the magnetic field generator according to Embodiment 1 of the present invention shown in FIGS. 1 and 2. 1 and 2, the non-magnetic translation stage 31 translates in the direction of translation 32a shown in the drawing, so that the magnetic resistance 38 (see FIG. 3) of the adjustment mechanism side gap 28 changes.
図４ないし図６は、本発明の実施形態１に係る磁場発生装置の動作／作用を説明する平面図である。いま図２において、調整機構側ギャップ28に磁性体30ａ〜30ｃが存在しない場合は、磁束29ａが流れる磁気回路の磁気抵抗は磁束９が流れる磁気回路の磁気抵抗よりも大きくなるように設定されており、磁束９は磁束29ａより大きくなる。このためエアギャップ８の磁束密度は調整機構側ギャップ28の磁束密度より大きくなる。 4 to 6 are plan views for explaining the operation / action of the magnetic field generator according to Embodiment 1 of the present invention. In FIG. 2, when the magnetic bodies 30a to 30c are not present in the adjustment mechanism side gap 28, the magnetic resistance of the magnetic circuit through which the magnetic flux 29a flows is set to be larger than the magnetic resistance of the magnetic circuit through which the magnetic flux 9 flows. The magnetic flux 9 is larger than the magnetic flux 29a. For this reason, the magnetic flux density of the air gap 8 becomes larger than the magnetic flux density of the adjustment mechanism side gap 28.
一方、図４に示すように、調整機構側ギャップ28に磁性体30ａが存在する場合は、磁束29ｂが流れる磁気回路の磁気抵抗は磁束９が流れる磁束回路の磁気抵抗よりも小さくなり、磁束９は磁束29ｂよりも小さくなる。このため、調整機構側ギャップ28に磁性体30ａ〜30ｃが存在しないときのエアギャップ８の磁束密度に比べ、調整機構側ギャップ28に磁性体30ａが存在する場合のエアギャップ８の磁束密度は小さくなる。 On the other hand, as shown in FIG. 4, when the magnetic body 30a is present in the adjustment mechanism side gap 28, the magnetic resistance of the magnetic circuit through which the magnetic flux 29b flows becomes smaller than the magnetic resistance of the magnetic flux circuit through which the magnetic flux 9 flows. Becomes smaller than the magnetic flux 29b. For this reason, the magnetic flux density of the air gap 8 when the magnetic body 30a exists in the adjustment mechanism side gap 28 is smaller than the magnetic flux density of the air gap 8 when the magnetic bodies 30a to 30c do not exist in the adjustment mechanism side gap 28. Become.
非磁性並進ステージ31に配置する磁性体30ａ、30ｂ、30ｃは、磁性体30ａ、30ｂ、30ｃの順に厚みが増すため、調整機構側ギャップ28の磁気抵抗38は調整機構側ギャップ28に磁性体がないとき（図２参照）、磁性体30ａが存在するとき（図４参照）、磁性体30ｂが存在するとき（図５参照）、磁性体30ｃが存在するとき（図６参照）、の順でエアギャップ８の磁束密度は小さくなる。 Since the magnetic bodies 30a, 30b, and 30c arranged on the nonmagnetic translation stage 31 increase in thickness in the order of the magnetic bodies 30a, 30b, and 30c, the magnetic resistance 38 of the adjustment mechanism side gap 28 has a magnetic substance in the adjustment mechanism side gap 28. 2 (see FIG. 2), when the magnetic body 30a is present (see FIG. 4), when the magnetic body 30b is present (see FIG. 5), and when the magnetic body 30c is present (see FIG. 6). The magnetic flux density of the air gap 8 becomes small.
これらのことから、非磁性並進ステージ31を図示の並進方向32ａの方向に動かす速度、磁性体30ａ〜30ｃの厚さおよび非磁性並進ステージ31に配置する磁性体の数などを適切に選択することで所望の過渡磁場を発生させることが可能となる。なお非磁性並進ステージ31は、ヨーク23，26に平行に永久磁石１に接近または離隔するように並進する。 From these facts, the speed for moving the nonmagnetic translation stage 31 in the direction of the translational direction 32a shown in the figure, the thickness of the magnetic bodies 30a to 30c, the number of magnetic bodies arranged on the nonmagnetic translation stage 31 and the like are appropriately selected. Thus, a desired transient magnetic field can be generated. The nonmagnetic translation stage 31 translates so as to approach or separate from the permanent magnet 1 in parallel with the yokes 23 and 26.
図７は、本発明の実施形態１に係る磁場発生装置の異なる動作を説明する斜視図である。図７に示すように並進方向が上記した図１に示した本発明の実施形態１に係る磁場発生装置と異なっているが、図７に示すような非磁性並進ステージ31の配置、並進方向32ｂの方向であっても本発明の実施形態１に係る磁場発生装置と同様にエアギャップの磁束密度を変化させることが可能である。なお図７に示す非磁性並進ステージ31は、ヨーク２，７に平行に永久磁石１とは一定の距離を保って並進する。 FIG. 7 is a perspective view illustrating different operations of the magnetic field generator according to Embodiment 1 of the present invention. As shown in FIG. 7, the translation direction is different from the magnetic field generator according to Embodiment 1 of the present invention shown in FIG. 1, but the arrangement of the nonmagnetic translation stage 31 as shown in FIG. Even in this direction, it is possible to change the magnetic flux density of the air gap as in the magnetic field generator according to the first embodiment of the present invention. The non-magnetic translation stage 31 shown in FIG. 7 translates in parallel to the yokes 2 and 7 with a constant distance from the permanent magnet 1.
図８は、本発明の実施形態２に係る磁場発生装置の動作を説明する平面図である。図８に示すように本発明の実施形態２に係る磁場発生装置では、傾斜のついた一体物の磁性体30ｄを用いて本発明の実施形態１に係る磁場発生装置と同様にエアギャップの磁束密度を変化させるものである。本発明の実施形態２に係る磁場発生装置によれば、本発明の実施形態１に係る磁場発生装置と同様にエアギャップの磁束密度を変化させることが可能である。 FIG. 8 is a plan view for explaining the operation of the magnetic field generator according to Embodiment 2 of the present invention. As shown in FIG. 8, in the magnetic field generator according to the second embodiment of the present invention, the magnetic gap 30d of the air gap is used in the same manner as in the magnetic field generator according to the first embodiment of the present invention using the inclined magnetic body 30d. The density is changed. According to the magnetic field generator according to Embodiment 2 of the present invention, it is possible to change the magnetic flux density of the air gap as in the magnetic field generator according to Embodiment 1 of the present invention.
図９は、本発明の実施形態３に係る磁場発生装置の動作を説明する平面図である。図９に示すように本発明の実施形態３に係る磁場発生装置では、厚みは同じでも透磁率の異なる材料を用いた磁性体30ｅ、30ｆ、30ｇを使用して本発明の実施形態１に係る磁場発生装置と同様にエアギャップの磁束密度を変化させるものである。本発明の実施形態３に係る磁場発生装置によれば、本発明の実施形態１に係る磁場発生装置と同様にエアギャップの磁束密度を変化させることが可能である。 FIG. 9 is a plan view for explaining the operation of the magnetic field generator according to Embodiment 3 of the present invention. As shown in FIG. 9, in the magnetic field generator according to Embodiment 3 of the present invention, magnetic bodies 30e, 30f, and 30g using materials having the same thickness but different permeability are used according to Embodiment 1 of the present invention. Like the magnetic field generator, the magnetic flux density of the air gap is changed. According to the magnetic field generator according to Embodiment 3 of the present invention, it is possible to change the magnetic flux density of the air gap as in the magnetic field generator according to Embodiment 1 of the present invention.
図１０は、本発明の実施形態４に係る磁場発生装置の構成を示す斜視図である。図１１は、本発明の実施形態４に係る磁場発生装置の構成を示す平面図である。図１０および図１１に示されるように、本発明の実施形態４に係る磁場発生装置は、永久磁石１、ヨーク２〜７、エアギャップ８、調整機構側ヨーク23〜26、調整機構側ギャップ28、同じ材料で厚さが異なる磁性体40ａ〜40ｃ、回転台41で構成されており、回転台41は回転軸42の回りでの回転が可能にされている。上記において従来構成と同じものには同じ番号を付与している。 FIG. 10 is a perspective view showing the configuration of the magnetic field generator according to Embodiment 4 of the present invention. FIG. 11 is a plan view showing a configuration of a magnetic field generator according to Embodiment 4 of the present invention. As shown in FIGS. 10 and 11, the magnetic field generator according to the fourth embodiment of the present invention includes a permanent magnet 1, yokes 2 to 7, an air gap 8, adjustment mechanism side yokes 23 to 26, and an adjustment mechanism side gap 28. The rotating body 41 is made up of magnetic bodies 40a to 40c having the same material and different thicknesses, and the rotating base 41 is capable of rotating around the rotating shaft 42. In the above description, the same reference numerals are assigned to the same components as those in the conventional configuration.
図１２は、図１０及び図１１に示した本発明の実施形態４に係る磁場発生装置の等価磁気回路を示す図である。図１０及び図１１において回転台41が回転することにより、調整機構側ギャップ28の磁気抵抗38が変化する。 FIG. 12 is a diagram showing an equivalent magnetic circuit of the magnetic field generator according to Embodiment 4 of the present invention shown in FIGS. 10 and 11. 10 and 11, when the turntable 41 rotates, the magnetic resistance 38 of the adjustment mechanism side gap 28 changes.
いま図１０及び図１１において調整機構側ギャップ28に磁性体40ａ〜40ｃが存在しないときは、図１１に示されるように磁束29ａが流れる磁気回路の磁気抵抗は磁束９が流れる磁気回路の磁気抵抗よりも大きくなるように設定されており、磁束９は磁束29ａより大きくなる。このためエアギャップ８の磁束密度は調整機構側ギャップ28の磁束密度より大きくなる。 10 and 11, when the magnetic bodies 40a to 40c are not present in the adjustment mechanism side gap 28, as shown in FIG. 11, the magnetic resistance of the magnetic circuit through which the magnetic flux 29a flows is the magnetic resistance of the magnetic circuit through which the magnetic flux 9 flows. The magnetic flux 9 is larger than the magnetic flux 29a. For this reason, the magnetic flux density of the air gap 8 becomes larger than the magnetic flux density of the adjustment mechanism side gap 28.
一方、図１３に示すように、調整機構側ギャップ28に磁性体40ａが存在する場合は、磁束29ｂが流れる磁気回路の磁気抵抗は磁束９が流れる磁束回路の磁気抵抗よりも小さくなり、磁束９は磁束29ｂよりも小さくなる。このため、調整機構側ギャップ28に磁性体40ａ〜40ｃが存在しないときのエアギャップ８の磁束密度に比べ、調整機構側ギャップ28に磁性体40ａが存在する場合のエアギャップ８の磁束密度は小さくなる。 On the other hand, as shown in FIG. 13, when the magnetic body 40a exists in the adjustment mechanism side gap 28, the magnetic resistance of the magnetic circuit through which the magnetic flux 29b flows becomes smaller than the magnetic resistance of the magnetic flux circuit through which the magnetic flux 9 flows. Becomes smaller than the magnetic flux 29b. For this reason, the magnetic flux density of the air gap 8 when the magnetic body 40a is present in the adjustment mechanism side gap 28 is smaller than the magnetic flux density of the air gap 8 when the magnetic bodies 40a to 40c are not present in the adjustment mechanism side gap 28. Become.
回転台41に配置する磁性体40ａ、40ｂ、40ｃは、磁性体40ａ、40ｂ、40ｃの順に厚みが減るため、調整機構側ギャップ28の磁気抵抗38は調整機構側ギャップ28に磁性体がないとき（図１０参照）、磁性体40ｃが存在するとき（図１５参照）、磁性体40ｂが存在するとき（図１４参照）、磁性体40ａが存在するとき（図１３参照）の順に小さくなり、エアギャップ８の磁束密度は調整機構側ギャップ28に磁性体がないとき（図１０参照）、磁性体40ｃが存在するとき（図１５参照）、磁性体40ｂが存在するとき（図１４参照）、磁性体40ａが存在するとき（図１３参照）の順に小さくなる。 When the magnetic bodies 40a, 40b, and 40c arranged on the turntable 41 are reduced in thickness in the order of the magnetic bodies 40a, 40b, and 40c, the magnetic resistance 38 of the adjustment mechanism side gap 28 has no magnetic body in the adjustment mechanism side gap 28. (See FIG. 10), the magnetic body 40c is present (see FIG. 15), the magnetic body 40b is present (see FIG. 14), and the magnetic body 40a is present (see FIG. 13). The magnetic flux density of the gap 8 is such that when there is no magnetic body in the adjustment mechanism side gap 28 (see FIG. 10), when the magnetic body 40c is present (see FIG. 15), when the magnetic body 40b is present (see FIG. 14) When the body 40a is present (see FIG. 13), the order decreases.
これらのことから、回転台41を回転軸42回りで回転させる速度、磁性体40ａ〜40ｃの厚さおよび回転台41に配置する磁性体の数などを適切に選択することで所望の過渡磁場を発生させることが可能となる。 From these, a desired transient magnetic field can be obtained by appropriately selecting the speed at which the rotating base 41 is rotated around the rotating shaft 42, the thickness of the magnetic bodies 40a to 40c, the number of magnetic bodies arranged on the rotating base 41, and the like. Can be generated.
図１６は、本発明の実施形態５に係る磁場発生装置の動作を説明する斜視図である。図１６に示すように本発明の実施形態５に係る磁場発生装置では、傾斜のついた一体物の磁性体40ｄを用いて本発明の実施形態４に係る磁場発生装置と同様にエアギャップの磁束密度を変化させるものである。本発明の実施形態５に係る磁場発生装置によれば、本発明の実施形態４に係る磁場発生装置と同様にエアギャップの磁束密度を変化させることが可能である。 FIG. 16 is a perspective view for explaining the operation of the magnetic field generator according to the fifth embodiment of the present invention. As shown in FIG. 16, in the magnetic field generator according to Embodiment 5 of the present invention, the magnetic flux 40 in the air gap is used in the same manner as in the magnetic field generator according to Embodiment 4 of the present invention using an inclined magnetic body 40 d. The density is changed. According to the magnetic field generator according to Embodiment 5 of the present invention, it is possible to change the magnetic flux density of the air gap similarly to the magnetic field generator according to Embodiment 4 of the present invention.
また図１７は、本発明の実施形態６に係る磁場発生装置の動作を説明する斜視図である。図１７に示すように本発明の実施形態６に係る磁場発生装置では、厚みは同じでも透磁率の異なる材料を用いた磁性体40ｅ、40ｆ、40ｇを使用して本発明の実施形態４に係る磁場発生装置と同様にエアギャップの磁束密度を変化させるものである。本発明の実施形態６に係る磁場発生装置によれば、本発明の実施形態４に係る磁場発生装置と同様にエアギャップの磁束密度を変化させることが可能である。 FIG. 17 is a perspective view for explaining the operation of the magnetic field generator according to Embodiment 6 of the present invention. As shown in FIG. 17, in the magnetic field generator according to Embodiment 6 of the present invention, magnetic bodies 40e, 40f, and 40g using materials having the same thickness but different permeability are used according to Embodiment 4 of the present invention. Like the magnetic field generator, the magnetic flux density of the air gap is changed. According to the magnetic field generator according to Embodiment 6 of the present invention, it is possible to change the magnetic flux density of the air gap similarly to the magnetic field generator according to Embodiment 4 of the present invention.
図１８は、本発明の実施形態７に係る磁場発生装置の構成を示す斜視図である。また図１９は、本発明の実施形態７に係る磁場発生装置の構成を示す平面図である。図１８及び図１９に示される本発明の実施形態７に係る磁場発生装置は、永久磁石１、ヨーク２〜７、エアギャップ８、調整機構側ヨーク23〜26、調整機構側ギャップ28、同じ材料で厚さが異なる磁性体30ａ〜30ｃ、磁性体30ａ〜30ｃを囲むように配置されたコイル50ａ〜50ｃ、回転台41で構成されており、回転台41は回転軸42の回りでの回転が可能にされている。上記において従来構成と同じものには同じ番号を付与している。 FIG. 18 is a perspective view showing the configuration of the magnetic field generator according to Embodiment 7 of the present invention. FIG. 19 is a plan view showing the configuration of the magnetic field generator according to Embodiment 7 of the present invention. The magnetic field generator according to Embodiment 7 of the present invention shown in FIGS. 18 and 19 includes a permanent magnet 1, yokes 2 to 7, air gap 8, adjusting mechanism side yokes 23 to 26, adjusting mechanism side gap 28, and the same material. Are composed of magnetic bodies 30a to 30c having different thicknesses, coils 50a to 50c arranged so as to surround the magnetic bodies 30a to 30c, and a turntable 41. The turntable 41 rotates around a rotation shaft 42. Has been made possible. In the above description, the same reference numerals are assigned to the same components as those in the conventional configuration.
図２０は、図１８及び図１９に示した本本発明の実施形態７に係る磁場発生装置の等価磁気回路である。図１８及び図１９において回転台41が回転することにより、調整機構側ギャップ28の磁気抵抗38が変化する。 FIG. 20 is an equivalent magnetic circuit of the magnetic field generator according to Embodiment 7 of the present invention shown in FIGS. 18 and 19. In FIG. 18 and FIG. 19, when the turntable 41 rotates, the magnetic resistance 38 of the adjustment mechanism side gap 28 changes.
いま図１８及び図１９において調整機構側ギャップ28に磁性体30ａ〜30ｃが存在しないときは、図１９に示されるように磁束29ａが流れる磁気回路の磁気抵抗は磁束９が流れる磁気回路の磁気抵抗よりも大きくなるように設定されており、磁束９は磁束29ａより大きくなる。このためエアギャップ８の磁束密度は調整機構側ギャップ28の磁束密度より大きくなる。 18 and 19, when the magnetic bodies 30a to 30c are not present in the adjustment mechanism side gap 28, the magnetic resistance of the magnetic circuit through which the magnetic flux 29a flows is as shown in FIG. The magnetic flux 9 is larger than the magnetic flux 29a. For this reason, the magnetic flux density of the air gap 8 becomes larger than the magnetic flux density of the adjustment mechanism side gap 28.
一方、図２１に示すように、調整機構側ギャップ28に磁性体30ａが存在する場合は、磁束29ｂが流れる磁気回路の磁気抵抗は磁束９が流れる磁束回路の磁気抵抗よりも小さくなり、磁束９は磁束29ｂよりも小さくなる。このため、調整機構側ギャップ28に磁性体30ａ〜30ｃが存在しないときのエアギャップ８の磁束密度に比べ、調整機構側ギャップ28に磁性体30ａが存在する場合のエアギャップ８の磁束密度は小さくなる。 On the other hand, as shown in FIG. 21, when the magnetic body 30a exists in the adjustment mechanism side gap 28, the magnetic resistance of the magnetic circuit through which the magnetic flux 29b flows becomes smaller than the magnetic resistance of the magnetic flux circuit through which the magnetic flux 9 flows. Becomes smaller than the magnetic flux 29b. For this reason, the magnetic flux density of the air gap 8 when the magnetic body 30a exists in the adjustment mechanism side gap 28 is smaller than the magnetic flux density of the air gap 8 when the magnetic bodies 30a to 30c do not exist in the adjustment mechanism side gap 28. Become.
回転台41に配置する磁性体30ａ、30ｂ、30ｃは、磁性体30ａ、30ｂ、30ｃの順に厚みが減るため、調整機構側ギャップ28の磁気抵抗38は調整機構側ギャップ28に磁性体がないとき（図１９参照）、磁性体30ｃが存在するとき（図２３参照）、磁性体30ｂが存在するとき（図２２参照）、磁性体30ａが存在するとき（図２１参照）の順に小さくなり、エアギャップ８の磁束密度は調整機構側ギャップ28に磁性体がないとき（図１９参照）、磁性体30ｃが存在するとき（図２３参照）、磁性体30ｂが存在するとき（図２２参照）、磁性体30ａが存在するとき（図２１参照）の順に小さくなる。 When the magnetic bodies 30a, 30b, and 30c arranged on the turntable 41 are reduced in thickness in the order of the magnetic bodies 30a, 30b, and 30c, the magnetic resistance 38 of the adjustment mechanism side gap 28 has no magnetic body in the adjustment mechanism side gap 28. (See FIG. 19), the magnetic body 30c is present (see FIG. 23), the magnetic body 30b is present (see FIG. 22), and the magnetic body 30a is present (see FIG. 21). The magnetic flux density of the gap 8 is such that when there is no magnetic body in the adjustment mechanism side gap 28 (see FIG. 19), when the magnetic body 30c is present (see FIG. 23), and when the magnetic body 30b is present (see FIG. 22) When the body 30a exists (see FIG. 21), the order decreases.
これらのことから、回転台41を回転軸42回りで回転させる速度、磁性体30ａ〜30ｃの厚さおよび回転台41に配置する磁性体の数などを適切に選択することで所望の過渡磁場を発生させることが可能となる。 From these, a desired transient magnetic field can be obtained by appropriately selecting the speed at which the rotating base 41 is rotated around the rotating shaft 42, the thickness of the magnetic bodies 30a to 30c, the number of magnetic bodies arranged on the rotating base 41, and the like. Can be generated.
磁性体30ａ〜30ｃが調整機構側ギャップ28に存在している場合、磁性体30ａ〜30ｃには調整側に流れる磁束29ｂ、29ｃ、29ｄが通過しているため、吸引力が発生し、磁性体30ａ〜30ｃが調整機構側ギャップ28から離れようとする際、回転台41の回転を妨げてしまう。このため、磁性体30ａ〜30ｃが調整機構側ギャップ28から離れようとする際にコイル50ａ〜50ｃを励磁し、調整機構側に流れる磁束29ｂ、29ｃ、29ｄと逆向きの磁束を発生させることで、吸引力を打ち消し、回転台41の回転をスムーズに回転させることが可能となる。 When the magnetic bodies 30a to 30c are present in the adjustment mechanism side gap 28, the magnetic bodies 30a to 30c pass through the magnetic fluxes 29b, 29c, and 29d flowing on the adjustment side, so that an attractive force is generated and the magnetic body When 30a-30c tries to leave | separate from the adjustment mechanism side gap 28, rotation of the turntable 41 will be prevented. For this reason, when the magnetic bodies 30a to 30c are about to leave the adjustment mechanism side gap 28, the coils 50a to 50c are excited to generate a magnetic flux opposite to the magnetic fluxes 29b, 29c and 29d flowing to the adjustment mechanism side. Thus, the suction force can be canceled and the rotation of the turntable 41 can be smoothly rotated.
図２４は、本発明の実施形態７に係る磁場発生装置におけるコイル50ａを励磁し、調整機構側に流れる磁束29ｂを打ち消す磁束51を発生させた場合の斜視図であり、他のコイル50ｂ、50ｃを励磁した場合も同様であるため図示を省略している。 FIG. 24 is a perspective view of the magnetic field generator according to the seventh embodiment of the present invention in which the coil 50a is excited to generate a magnetic flux 51 that cancels out the magnetic flux 29b flowing to the adjustment mechanism side, and the other coils 50b, 50c are shown. Since the same applies to the case of excitation, the illustration is omitted.
１ 永久磁石
２〜７ ヨーク
８ エアギャップ
９ 磁束
10 永久磁石の起磁力
11 永久磁石の磁気抵抗
12〜17 ヨーク２〜７の磁気抵抗
18 エアギャップ８の磁気抵抗
23〜26 調整機構側ヨーク
28 調整機構側エアギャップ
29ａ〜29ｄ 調整機構側に流れる磁束
30ａ〜30ｇ 磁性体
31 非磁性並進ステージ
32ａ，32ｂ 並進方向
33〜36 調整機構側ヨーク23〜26の磁気抵抗
38 調整機構側ギャップ28の磁気抵抗
40ａ〜40ｇ 磁性体
41 回転台
42 回転台の回転軸
50ａ〜50ｃ コイル
51 磁束
1 Permanent magnet 2-7 Yoke 8 Air gap 9 Magnetic flux
10 Magnetomotive force of permanent magnet
11 Magnetoresistance of permanent magnet
12-17 Magnetoresistance of yokes 2-7
18 Magnetic resistance of air gap 8
23 ~ 26 Adjustment mechanism side yoke
28 Adjustment mechanism air gap
29a to 29d Magnetic flux flowing to the adjustment mechanism
30a-30g Magnetic material
31 Non-magnetic translation stage
32a, 32b Translation direction
33 ~ 36 Magnet resistance of adjusting mechanism side yoke 23 ~ 26
38 Magnetic resistance of adjustment mechanism side gap 28
40a-40g Magnetic material
41 Turntable
42 Rotating axis of turntable
50a-50c coil
51 Magnetic flux
Claims (7)
前記エアギャップを含まずに磁性体を用いたループ磁気回路を形成し、形成した前記ループ磁気回路の磁性体の一部分を磁性体ユニットとして磁気抵抗の異なる磁性体を直線状に配置し、該磁性体ユニットを並進させて前記エアギャップに発生する磁束密度を調整する調整機構を設けたことを特徴とする磁場発生装置。 In a magnetic field generator using a permanent magnet, a magnetic body that is a path of magnetic flux generated from the permanent magnet, an air gap between the magnetic bodies, and using a magnetic flux density generated in the air gap,
A loop magnetic circuit using a magnetic material without including the air gap is formed, a part of the magnetic material of the formed loop magnetic circuit is used as a magnetic unit, and magnetic materials having different magnetic resistances are linearly arranged, and the magnetic A magnetic field generator comprising an adjustment mechanism for adjusting a magnetic flux density generated in the air gap by translating a body unit.
前記エアギャップを含まずに磁性体を用いたループ磁気回路を形成し、形成した前記ループ磁気回路の磁性体の一部分に回転台上に磁気抵抗の異なる磁性体を配置した磁性体ユニットを可動してループ結合させて前記エアギャップに発生する磁束密度を調整する調整機構を設けたことを特徴とする磁場発生装置。 In a magnetic field generator using a permanent magnet, a magnetic body that is a path of magnetic flux generated from the permanent magnet, an air gap between the magnetic bodies, and using a magnetic flux density generated in the air gap,
A loop magnetic circuit using a magnetic material is formed without including the air gap, and a magnetic material unit in which a magnetic material having a different magnetic resistance is arranged on a rotating table is partially moved in the magnetic material of the formed loop magnetic circuit. And a magnetic field generator characterized in that an adjustment mechanism for adjusting a magnetic flux density generated in the air gap is provided.
5. The magnetic field generator according to claim 4, wherein a coil is disposed so as to surround the magnetic body of the magnetic body unit, and the magnetic body is separated from a loop magnetic circuit configured using the magnetic body without including the air gap. A magnetic field generator characterized by exciting the coil only when the magnetic flux passing through the magnetic material is canceled.
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| CN108430149A (en) * | 2018-03-20 | 2018-08-21 | 中国科学院高能物理研究所 | Permanent magnet magnetic field adjusting device and permanent magnet magnetic field adjusting method |
| CN108430149B (en) * | 2018-03-20 | 2019-10-15 | 中国科学院高能物理研究所 | Permanent magnet magnetic field adjusting device and permanent magnet magnetic field adjusting method |
| CN111751418A (en) * | 2020-07-29 | 2020-10-09 | 中山大学 | An electrolytic cell device capable of external magnetic field and adjustable magnetic field strength |
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