JP2023043933A - Iron core structure and transformer - Google Patents

Iron core structure and transformer Download PDF

Info

Publication number
JP2023043933A
JP2023043933A JP2021151685A JP2021151685A JP2023043933A JP 2023043933 A JP2023043933 A JP 2023043933A JP 2021151685 A JP2021151685 A JP 2021151685A JP 2021151685 A JP2021151685 A JP 2021151685A JP 2023043933 A JP2023043933 A JP 2023043933A
Authority
JP
Japan
Prior art keywords
iron core
ferrite cores
magnetic flux
core
core structure
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
Application number
JP2021151685A
Other languages
Japanese (ja)
Inventor
幹弥 石橋
Mikiya Ishibashi
慎矢 高橋
Shinya Takahashi
勝 山本
Masaru Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denkiseikosha Co Ltd
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Denkiseikosha Co Ltd
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Denkiseikosha Co Ltd, Meidensha Corp, Meidensha Electric Manufacturing Co Ltd filed Critical Denkiseikosha Co Ltd
Priority to JP2021151685A priority Critical patent/JP2023043933A/en
Publication of JP2023043933A publication Critical patent/JP2023043933A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Coils Or Transformers For Communication (AREA)

Abstract

To make magnetic resistance of a magnetic path in an iron core of a transformer uniform to alleviate concentration of a magnetic flux at inner corners of the iron core.SOLUTION: A gap member 6 made of a magnetoresistive material is arranged between a plurality of ferrite cores 20 on the yoke portion 22 side of an iron core 2 made up of the plurality of ferrite cores 20 such that magnetic flux density in an inner layer of the iron core 2 becomes uniform. A gap member 6 is disposed, for example, between ferrite cores 20 on the yoke portion 22 side at a corner portion 23 which is a joint portion between a leg portion 21 and a yoke portion 22 of the iron core 2.SELECTED DRAWING: Figure 1

Description

本発明は、高周波大容量の変圧器の鉄心、特に、フェライトコアからなる鉄心の構造に関する。 The present invention relates to an iron core for a high-frequency, large-capacity transformer, and more particularly to an iron core structure made of a ferrite core.

大容量の変圧器の鉄心は、一般的に、例えばフェライトコアからなる板状の磁性体を額縁状に配置したものを一方向に積層した構造を成す(特許文献1,2)。 Iron cores of large-capacity transformers generally have a structure in which plate-shaped magnetic bodies made of, for example, ferrite cores are arranged in a picture frame and laminated in one direction (Patent Documents 1 and 2).

実全昭58-12915号公報Japanese Utility Model No. 58-12915 特開平5-326289号公報JP-A-5-326289

特許文献1,2等の同一のフェライトコアを積層して鉄心を構成した変圧器は、フェライトコア間の接着剤等によって形成されたギャップにより、鉄心の外側磁路の磁気抵抗が大きくなる。このため、図3に示されたように、鉄心2のレグ部21からの磁束は、磁気抵抗がより小さいヨーク部22の内側の層に偏り、レグ部21とヨーク部22との接合部である鉄心2の角部23に磁束が集中して鉄損増加及び過熱に至る。 In the transformers in which the same ferrite cores are stacked to configure the iron core, such as those disclosed in Patent Documents 1 and 2, the magnetic resistance of the outer magnetic path of the iron core increases due to the gap formed by the adhesive or the like between the ferrite cores. For this reason, as shown in FIG. 3, the magnetic flux from the leg portion 21 of the iron core 2 is biased toward the inner layer of the yoke portion 22 where the magnetic resistance is smaller, and at the joint portion between the leg portion 21 and the yoke portion 22 The magnetic flux concentrates at the corners 23 of the iron core 2, leading to an increase in iron loss and overheating.

本発明は、以上の事情を鑑み、変圧器の鉄心における磁路の磁気抵抗を均一化して当該鉄心の内側角部における磁束の集中の緩和を図ることを課題とする。 In view of the above circumstances, it is an object of the present invention to equalize the magnetic resistance of the magnetic path in the iron core of a transformer and reduce the concentration of magnetic flux at the inner corners of the iron core.

そこで、本発明の一態様は、複数のフェライトコアからなる鉄心のヨーク部側のフェライトコア間に当該鉄心の内側の層の磁束密度が均一となるように磁気抵抗材料からなるギャップ部材が配される鉄心構造である。 Therefore, in one aspect of the present invention, a gap member made of a magnetoresistive material is arranged between the ferrite cores on the yoke portion side of the iron core made up of a plurality of ferrite cores so that the magnetic flux density of the inner layer of the iron core becomes uniform. It is a core structure that

本発明の一態様は、前記鉄心構造において、前記鉄心のレグ部とヨーク部との接合部における当該ヨーク部側のフェライトコア間に配される。 In one aspect of the present invention, in the iron core structure, the iron core is arranged between the ferrite cores on the yoke portion side at the joint portion between the leg portion of the iron core and the yoke portion.

本発明の一態様は、前記鉄心構造において、前記複数のフェライトコアは、鉄心軸方向と直交する横断面が同等である。 In one aspect of the present invention, in the core structure, the plurality of ferrite cores have the same cross section perpendicular to the core axial direction.

本発明の一態様は、前記鉄心構造において、前記複数のフェライトは、接着剤により接着され、前記ギャップ部材が介在するフェライトコアの間隔と前記接着剤が介在するフェライトコアの間隔との比率は、前記磁束密度が均一となるように設定される。 In one aspect of the present invention, in the iron core structure, the plurality of ferrites are bonded with an adhesive, and the ratio of the spacing between the ferrite cores with the gap member interposed to the spacing between the ferrite cores with the adhesive is The magnetic flux density is set to be uniform.

本発明の一態様は、上記の鉄心構造を有する変圧器である。 One aspect of the present invention is a transformer having the above core structure.

以上の本発明によれば、変圧器の鉄心における磁路の磁気抵抗が均一化し、鉄心の内側角部における磁束の集中の緩和が図られる。 According to the present invention described above, the magnetic resistance of the magnetic path in the iron core of the transformer is made uniform, and the concentration of the magnetic flux at the inner corners of the iron core is alleviated.

本発明の一態様である変圧器の鉄心構造の横断面図。1 is a cross-sectional view of a core structure of a transformer that is one embodiment of the present invention; FIG. 本発明の一態様である鉄心における磁束密度分布。Magnetic flux density distribution in an iron core that is one embodiment of the present invention. 従来の変圧器の鉄心における磁束密度分布。Magnetic flux density distribution in the core of a conventional transformer.

以下に図面を参照しながら本発明の実施形態について説明する。 Embodiments of the present invention will be described below with reference to the drawings.

図1に示された本発明の鉄心構造の一態様である鉄心2は、例えば内鉄形の変圧器1に適用される。 A core 2, which is one aspect of the core structure of the present invention shown in FIG. 1, is applied to a core-type transformer 1, for example.

鉄心2は、例えば巻線として一次巻線3,二次巻線4が各々券回されるレグ部21と、一次巻線3,二次巻線4が券回されないヨーク部22と、を有する。 The iron core 2 has, for example, a leg portion 21 in which the primary winding 3 and the secondary winding 4 are respectively wound as windings, and a yoke portion 22 in which the primary winding 3 and the secondary winding 4 are not wound. .

レグ部21及びヨーク部22は、直方体状若しくは長板状の複数のフェライトコア20から成る。この複数のフェライトコア20は、同一寸法で形成され、鉄心軸方向と直交する横断面が同等に形成されている。そして、この複数のフェライトコア20が同図のように額縁状に配置さらに一方向に積層されることで中空角柱状の鉄心2が構成される。尚、隣接のフェライトコア20は鉄心製造分野において周知の接着剤5を用いた接着法により接着される。 The leg portion 21 and the yoke portion 22 are composed of a plurality of rectangular parallelepiped or long plate-shaped ferrite cores 20 . The plurality of ferrite cores 20 are formed with the same dimensions, and have the same cross section perpendicular to the core axial direction. A plurality of ferrite cores 20 are arranged in a frame shape as shown in FIG. Adjacent ferrite cores 20 are bonded by a bonding method using an adhesive 5 well known in the field of core manufacturing.

また、鉄心2のヨーク部22側のフェライトコア20間には、鉄心2の内側の層の磁束密度が均一となるように磁気抵抗材料からなるギャップ部材6が配される。図1に例示されたギャップ部材6は、ヨーク部22と鉄心のレグ部21との接合部である角部23におけるヨーク部22側のフェライトコア20間にてヨーク部22の内面と垂直に配置される。 A gap member 6 made of a magnetoresistive material is arranged between the ferrite cores 20 on the yoke portion 22 side of the iron core 2 so that the magnetic flux density of the inner layer of the iron core 2 becomes uniform. The gap member 6 illustrated in FIG. 1 is arranged perpendicular to the inner surface of the yoke portion 22 between the ferrite cores 20 on the yoke portion 22 side at the corner portion 23 which is the joint portion between the yoke portion 22 and the iron core leg portion 21 . be done.

前記磁気抵抗材料としては、メタ系アラミド繊維やエポキシ樹脂接着剤に例示される周知の耐熱性の繊維材料や接着剤が適用される。そして、ギャップ部材6が介在するフェライトコア20の間隔G1と接着剤5が介在するフェライトコア20の間隔G2との比率は、前記磁束密度が均一となるように設定される。特に、フェライトコア20の間隔G1は、フェライトコア20の間隔G2よりも大きく確保するとなおよい。 As the magnetoresistive material, well-known heat-resistant fiber materials and adhesives such as meta-aramid fibers and epoxy resin adhesives are applied. The ratio between the gap G1 between the ferrite cores 20 interposed by the gap member 6 and the gap G2 between the ferrite cores 20 interposed by the adhesive 5 is set so that the magnetic flux density is uniform. In particular, it is more preferable to ensure that the interval G1 between the ferrite cores 20 is greater than the interval G2 between the ferrite cores 20. FIG.

複数のフェライトコア20は、奥行以外が相似形状であれば、磁路長におけるフェライトコア20の間隔の効果は概ね同程度となるので、磁気抵抗の緩和の効果も同様となる。フェライトコア20の横断面の縦、横、奥行の寸法は、所望の伝送電力量、電圧、電流若しくはインダクタンス値等に基づき決定される。 If the plurality of ferrite cores 20 have similar shapes other than the depth, the effect of the spacing of the ferrite cores 20 on the magnetic path length is approximately the same, so the effect of relieving magnetic resistance is also the same. The vertical, horizontal, and depth dimensions of the cross section of the ferrite core 20 are determined based on the desired transmission power amount, voltage, current, or inductance value.

以上の鉄心2の態様によれば、ヨーク部22の外側磁路及び内側磁路の磁気抵抗の差を小さくなり、磁路の磁気抵抗が均一化され、鉄心の内側角部への磁束の集中が緩和される。 According to the above aspect of the iron core 2, the difference in magnetic resistance between the outer magnetic path and the inner magnetic path of the yoke portion 22 is reduced, the magnetic resistance of the magnetic path is made uniform, and the magnetic flux is concentrated at the inner corner of the iron core. is alleviated.

図2,3を参照して本実施形態の鉄心2の作用効果について説明する。 The effects of the iron core 2 of this embodiment will be described with reference to FIGS.

図2は本実施形態の鉄心2における磁束密度分布を示す。鉄心2のフェライトコア20の寸法は、長辺L1=150mm、短辺L2=87.5mm及び鉄心軸方向奥行D1=12mmである。フェライトコア20の間隔G1は、1mmである。フェライトコア20の間隔G2は、0.25mmである。フェライトコア20の積層体の鉄心軸方向奥行D1は、360mmである。図2の鉄心2の一次巻線3及び二次巻線4の巻き数や電流等の条件は図3の変圧器1と同様の条件とした。 FIG. 2 shows the magnetic flux density distribution in the iron core 2 of this embodiment. The dimensions of the ferrite core 20 of the iron core 2 are long side L1=150 mm, short side L2=87.5 mm, and core axial depth D1=12 mm. The interval G1 between the ferrite cores 20 is 1 mm. The interval G2 between the ferrite cores 20 is 0.25 mm. The core axial depth D1 of the laminate of ferrite cores 20 is 360 mm. Conditions such as the number of turns and the current of the primary winding 3 and the secondary winding 4 of the iron core 2 in FIG. 2 are the same as those of the transformer 1 in FIG.

同図に示された磁束密度分布のように、鉄心2の角部23のヨーク部22側にて鉄心2の内面に対して垂直方向にギャップ部材6を配置させることで、鉄心2の磁路の磁気抵抗の均一化が認められた。また、この磁気抵抗の均一化により、ヨーク部22の外側寄りの層の磁路にも磁束が通り、鉄心2の角部23の内側の層での磁束の集中を緩和できることが示された。したがって、本実施形態の同一寸法のフェライトコア20を積層させた鉄心2の場合であっても、角部23における磁束の集中が抑制される。特に、鉄心2のヨーク部22にてフェライトコア20を高さ方向に2個以上並べている場合に効果がある。 As shown in the magnetic flux density distribution shown in FIG. uniformity of magnetoresistance was observed. In addition, it was shown that the magnetic flux passes through the magnetic path of the outer layer of the yoke portion 22 due to the uniform magnetic resistance, and the concentration of the magnetic flux in the inner layer of the corner portion 23 of the iron core 2 can be alleviated. Therefore, even in the case of the iron core 2 in which the ferrite cores 20 of the same size of the present embodiment are laminated, the concentration of the magnetic flux at the corners 23 is suppressed. In particular, it is effective when two or more ferrite cores 20 are arranged in the height direction in the yoke portion 22 of the iron core 2 .

一方、比較例として鉄心2の角部23におけるレグ部21側にてギャップ部材6を鉄心2の内面に対して垂直方向に配置させた態様においては、鉄心2の磁束密度分布が図3に示された従来の鉄心2の磁束密度分布と略同じ結果となり、鉄心2の角部23の内側の層における磁束集中を抑制できないことが確認された。 On the other hand, as a comparative example, in a mode in which the gap member 6 is arranged in the direction perpendicular to the inner surface of the iron core 2 on the side of the leg portion 21 at the corner portion 23 of the iron core 2, the magnetic flux density distribution of the iron core 2 is shown in FIG. It was confirmed that the magnetic flux concentration in the layers inside the corners 23 of the iron core 2 could not be suppressed.

ところで、鉄心2の磁路の磁気抵抗を均一化するために、鉄心2の外側の層でフェライトコア20の数をより少なく、鉄心2の内側の層でフェライトコア20の接続部数をより多くし、寸法の異なるフェライトコアを用いた鉄心2の態様を採ることもできる。 By the way, in order to make the magnetic resistance of the magnetic path of the iron core 2 uniform, the number of ferrite cores 20 is reduced in the outer layers of the iron core 2, and the number of connecting portions of the ferrite cores 20 is increased in the inner layers of the iron core 2. Alternatively, the iron core 2 may employ ferrite cores having different dimensions.

これに対して、本実施形態の鉄心2においては、同一寸法のフェライトコア20を用いて鉄心2を成しているので、上述の寸法の異なるフェライトコア20を用いた鉄心2と比べて、より低コストに鉄心2の磁路の磁気抵抗を均一化できる。 On the other hand, in the iron core 2 of the present embodiment, since the iron core 2 is formed using the ferrite cores 20 having the same dimensions, the iron core 2 has a higher The magnetic resistance of the magnetic path of the iron core 2 can be made uniform at low cost.

尚、以上の実施形態の鉄心構造は内鉄形の変圧器に適用されたものであるが、本発明の鉄心構造は、外鉄形の変圧器にも適用しても当該実施形態と同様の効果が得られることは明らかである。また、鉄心2は二層構造の鉄心であるが、本発明の鉄心構造は三層以上の鉄心にも適用しても上記実施形態と同様の効果が得られることは明らかである。 Although the core structure of the above embodiment is applied to a core-type transformer, the core structure of the present invention can be applied to a shell-type transformer as well. It is clear that the effect is obtained. Further, although the core 2 has a two-layer structure, it is clear that the same effect as the above embodiment can be obtained even if the core structure of the present invention is applied to a core having three or more layers.

1…変圧器
2…鉄心、20…フェライトコア、21…レグ部、22…ヨーク部、23…角部
3…一次巻線
4…二次巻線
5…接着剤
6…ギャップ部材
DESCRIPTION OF SYMBOLS 1... Transformer 2... Iron core 20... Ferrite core 21... Leg part 22... Yoke part 23... Corner part 3... Primary winding 4... Secondary winding 5... Adhesive 6... Gap member

Claims (5)

複数のフェライトコアからなる鉄心のヨーク部側のフェライトコア間に当該鉄心の内側の層の磁束密度が均一となるように磁気抵抗材料からなるギャップ部材が配されることを特徴とする鉄心構造。 An iron core structure characterized by disposing a gap member made of a magnetoresistive material between ferrite cores on the yoke side of an iron core made up of a plurality of ferrite cores so that magnetic flux density in layers inside the iron core is uniform. 前記ギャップ部材は、前記鉄心のレグ部とヨーク部との接合部における当該ヨーク部側の前記フェライトコア間に配されることを特徴とする請求項1に記載の鉄心構造。 2. The iron core structure according to claim 1, wherein the gap member is arranged between the ferrite cores on the yoke side at the joints between the leg portions and the yoke portions of the iron core. 前記複数のフェライトコアは、鉄心軸方向と直交する横断面が同等であることを特徴とする請求項1または2に記載の鉄心構造。 3. The iron core structure according to claim 1, wherein said plurality of ferrite cores have the same cross section orthogonal to the core axial direction. 前記複数のフェライトは、接着剤により接着され、
前記ギャップ部材が介在するフェライトコアの間隔と前記接着剤が介在するフェライトコアの間隔との比率は、前記磁束密度が均一となるように設定されることを特徴とする請求項1から3のいずれか1項に記載の鉄心構造。
The plurality of ferrites are bonded with an adhesive,
4. The magnetic flux density of any one of claims 1 to 3, wherein a ratio of the spacing between the ferrite cores interposed by the gap member and the spacing between the ferrite cores interposed by the adhesive is set so that the magnetic flux density is uniform. or the core structure according to 1.
請求項1から4のいずれか1項に記載の鉄心構造を有する変圧器。 A transformer having the core structure according to any one of claims 1 to 4.
JP2021151685A 2021-09-17 2021-09-17 Iron core structure and transformer Pending JP2023043933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021151685A JP2023043933A (en) 2021-09-17 2021-09-17 Iron core structure and transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2021151685A JP2023043933A (en) 2021-09-17 2021-09-17 Iron core structure and transformer

Publications (1)

Publication Number Publication Date
JP2023043933A true JP2023043933A (en) 2023-03-30

Family

ID=85725890

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2021151685A Pending JP2023043933A (en) 2021-09-17 2021-09-17 Iron core structure and transformer

Country Status (1)

Country Link
JP (1) JP2023043933A (en)

Similar Documents

Publication Publication Date Title
EP0706192B1 (en) Choke coil
WO2020071512A1 (en) Wound core and transformer
WO2018070199A1 (en) Coil component and power source device comprising same
JP2010232272A (en) Transformer
JP2019050327A (en) Iron core for core-type transformer
KR102136026B1 (en) Combined structure of variable-capacity transformer structure using ferrite core for magnetic flux assistance and method for manufacturing the same
JP6075678B2 (en) Composite magnetic core, reactor and power supply
JP2023043933A (en) Iron core structure and transformer
JP4922191B2 (en) Inductance element
JP6781043B2 (en) Composite magnetic circuit inductor
JP2023043934A (en) Iron core structure and transformer
JP5900741B2 (en) Composite magnetic core, reactor and power supply
KR102535253B1 (en) Magnetic core and coil component including the same
JP2023043935A (en) Iron core structure and transformer
JP5787635B2 (en) Static inductor and method for manufacturing the same
US20230238166A1 (en) Stationary Induction Electric Apparatus
JP3602712B2 (en) choke coil
KR102131584B1 (en) Structure or Method of Transformer Core for Saturation Flux Reduction
KR102139004B1 (en) Variable-capacity transformer structure using magnetic flux assist slot and manufacturing method thereof
JP2008288441A (en) Coil
TWM569926U (en) Transformer with improved winding structure
JP2014212163A (en) Choke coil
JP2010123650A (en) Reactor
JP6916132B2 (en) Laminated iron core and static induction electric device
US2929038A (en) Laminated magnetic core

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20240806