JP3857173B2

JP3857173B2 - Transformer

Info

Publication number: JP3857173B2
Application number: JP2002108747A
Authority: JP
Inventors: 正尚桑原; 洋一天兒; 博之遠藤
Original assignee: Hitachi Industrial Equipment Systems Co Ltd
Current assignee: Hitachi Industrial Equipment Systems Co Ltd
Priority date: 2002-04-11
Filing date: 2002-04-11
Publication date: 2006-12-13
Anticipated expiration: 2022-04-11
Also published as: JP2003303718A

Description

【０００１】
【発明の属する技術分野】
本発明は、アモルファス材を積層した巻鉄心を用いる変圧器の構成に関する。
【０００２】
【従来の技術】
従来、例えば、アモルファス（非晶質磁性合金）の薄帯状材料（以下、アモルファス材という）を巻鉄心に用いる変圧器としては単相変圧器がある。該単相変圧器では、積層したアモルファス材をコイル中を貫通させ、両端部をラップさせてつないだ環状構造としている。かかる構成の巻鉄心では、図６に示すように、ラップ部４'の剥がれが生じ易く、これを防止するために、図７に示すように、コア１'の外周にけい素鋼板１０を巻き回し、該けい素鋼板１０を、テープ１１または溶接等で固定したり、バンド１２'により締付けるようにして、ラップ部４'の変位を抑えるようにしている。
また、特開平１０−４１１４６号公報には、３相３脚鉄心を用いる変圧器において、内側巻鉄心と外側巻鉄心との間に補強板を設け、内側巻鉄心の外周コーナ部と外側巻鉄心の内周側との間の空隙部に起因して該外側巻鉄心の内周寄りの非晶質磁性合金の薄帯に発生する弛みを防止する技術が記載されている。自重等に基づく巻鉄心の変形についての記載はない。
【０００３】
【発明が解決しようとする課題】
上記アモルファス材は剛性が低く変形し易い。このため、積層鉄心の状態においても、自重等により巻鉄心のヨーク部に、アモルファス材の積層方向の巻鉄心厚さ全体にわたって変形が生じ易く、特に、大型変圧器においてヨーク長さが長い巻鉄心の場合には該変形が顕著となる。ヨーク部の巻鉄心の変形は、巻鉄心１'全体の磁気特性を劣化させ、変圧器の鉄損や騒音を増大させる。図８は、例えば、長いヨーク部５を有する巻鉄心１'の外周にけい素鋼板などを巻き回し、さらにその上をバンドで締付けた構成におけるヨーク部５の変形の例を示す。該ヨーク部５は、バンドによる締付け状態にもかかわらず自重によって波状に変形し、該変形によってラップ部４'も剥がれやオーバーラップなどの不具合を生じ易い。ラップ部４'の剥がれやオーバーラップなども、巻鉄心の磁気特性を劣化させ、変圧器の鉄損や騒音を増大させる。ラップ部を有しない場合も、重力による波状の変形を生じ、巻鉄心の磁気特性を劣化させ、変圧器の鉄損や騒音を増大させる。また、上記特開平１０−４１１４６号公報記載の技術はあくまでも、外側巻鉄心の内周寄りの非晶質磁性合金の薄帯の弛みだけを防止する範囲のものであり、上記自重等による巻鉄心の厚さ全体にわたる変形を防止するための十分な対策技術にはなり得ないと考えられる。
本発明の課題点は、上記従来技術の状況に鑑み、アモルファス材を積層した巻鉄心を用いる変圧器において、該巻鉄心のヨーク部の積層方向の変形を抑え、磁気特性の劣化を抑えるようにすることである。
本発明の目的は、かかる課題点を解決できる技術の提供にある。
【０００４】
【課題を解決するための手段】
上記課題点を解決するために、本発明では、アモルファス材を積層した巻鉄心を用いる変圧器において、基本的に、板状部分を有した補強部材を巻鉄心のヨーク部に設け、該ヨーク部をアモルファス材積層方向の厚さ全体にわたり補強して少なくとも該巻鉄心のアモルファス材積層方向の変形を抑える構成とする。具体的には、薄帯状のアモルファス材を積層して成る巻鉄心を用いて構成される変圧器として、（１）上記アモルファス材の端部を互いに周方向にずらして重ねたラップ部がヨーク部（該当実施例：符号５ａ _１〜５ａ _４）に位置し複数の環状の磁気回路を形成する複数の環状の巻鉄心（該当実施例：符号２ａ _１〜２ａ _４）と、該複数の環状の巻鉄心の、上記ラップ部が位置する複数のヨーク部（該当実施例：符号５ａ _１〜５ａ _４）のそれぞれの内周面側に設けられた複数の板状の第１の補強部材（該当実施例：符号８ａ _１〜８ａ _４）と、上記複数の環状の巻鉄心の、上記ラップ部が位置する複数のヨーク部の外周面側に、該複数のヨーク部を間にはさんで上記第１の補強部材に対向し該複数のヨーク部及び該複数の第１の補強部材に共通に設けられた１個の第２の補強部材（該当実施例：符号８ｃ _１、８ｆ）と、を備え、上記第１及び第２の補強部材を、上記ラップ部が位置する複数のヨーク部を間にはさんだ状態で該各ヨーク部側に固定し、該ラップ部が位置する複数の各ヨーク部を補強する構成とする。（２）上記（１）において、上記第２の補強部材を、Ｕ字状断面を有し、上記複数の環状の巻鉄心の、上記ラップ部が位置する複数のヨーク部の外周面側に、該Ｕ字状断面の内面側を対向させて設けられる構成（該当実施例：符号８ｆ）とする。（３）上記（１）または（２）において、さらに、上記第１及び第２の補強部材の周りに設けられ、該第１及び第２の補強部材を、該第１及び第２の補強部材が上記複数の各ヨーク部をはさんだ状態で、ヨーク部側に固定するテープ（該当実施例：符号９）を備えた構成とする。
【０００５】
【発明の実施の形態】
以下、本発明の実施例につき、図面を用いて説明する。
図１は、本発明の変圧器の第１の実施例を示す図である。
本実施例は、アモルファス材を積層して成る巻鉄心を用いた３相３脚鉄心変圧器の場合の構成例である。
図１（ａ）は、２個の内側巻鉄心と１個の外側巻鉄心とを組合せた構成を示す側面図、図１（ｂ）は外側巻鉄心の斜視図である。図１において、１は外側巻鉄心、２ａ、２ｂは内側巻鉄心、３ａ、３ｂ、３ｃはコイル、４は、外側巻鉄心１において積層したアモルファス材の端部のつなぎ目部分を互いに周方向にずらしたラップ部、４ａ、４ｂはそれぞれ、内側巻鉄心２ａ、２ｂにおいて積層したアモルファス材の端部のつなぎ目部分を互いに周方向にずらしたラップ部、５、５'は外側巻鉄心１のヨーク部、６は角部、７ａは、外側巻鉄心１のコア部（コイル３ａ内に挿入される部分）、７ｂは、外側巻鉄心１のコア部（コイル３ｃ内に挿入される部分）、８ａ、８ｂは補強部材、９は、補強部材８ａ、８ｂを補強するとともに該補強部材８ａ、８ｂをヨーク部５側に固定する固定用部材としてのテープ、１２は同じく固定用部材としてのバンドである。図の上方が変圧器の上部側、図の下方が変圧器の下部側で、Ｇの方向に重力が作用するようになっている。製作時、内側巻鉄心２ａは、コイル３ａ、３ｂに挿入された後、ラップ部４ａで磁気回路的に接続されて環状にされ、内側巻鉄心２ｂは、コイル３ｂ、３ｃに挿入された後、ラップ部４ｂで磁気回路的に接続されて環状にされ、また、外側巻鉄心１は、内側巻鉄心２ａ、２ｂの外側においてコイル３ａ、３ｃに挿入された後、ラップ部４で磁気回路的に接続されて環状にされる。本実施例の変圧器においては、上記各ラップ部は、それぞれの巻鉄心においてコイル下方のヨーク部に設けられる。補強部材８ａ、８ｂはそれぞれ板状の形状を有し、補強部材８ａは外側巻鉄心１のヨーク部５の内周面側に、補強部材８ｂは同ヨーク部５の外周面側にそれぞれ配され、両補強部材で該ヨーク部５をはさんで特にヨーク部のアモルファス材積層方向の強度を補う。補強部材８ａは、例えば外側巻鉄心１を環状に形成する前に、内側巻鉄心２ａ、２ｂの外周部位置に配置しておく。テープ９は、補強部材８ａ、８ｂをヨーク部５に固定、または、該補強部材８ａ、８ｂを補強する。該テープ９は、予め補強板８ａ上に設けておいてもよい。バンド１２は、外側巻鉄心１の周りに巻きつけられ、補強部材８ｂをヨーク部５に固定したり、または、該外側巻鉄心１を補強したりする。かかる補強部材８ａ、８ｂを配した構成により、巻鉄心の該ヨーク部５における自重等による重力方向の変形、すなわちアモルファス材積層方向の変形を抑える。固定用部材は、上記テープに限定されず、ひも状のものを用いてもよいし、絶縁材から成るねじやボルト、または絶縁処理を施した部材等を用いてもよい。また、図１の構成では、補強部材８ａ、８ｂを外側巻鉄心１のヨーク部５側にのみに設ける構成としたが、この他、例えば、ヨーク部５'側にも設けてもよいし、または、内側巻鉄心２ａ、２ｂのそれぞれのヨーク部にも設けるようにしてもよいし、補強部材８ａを内側巻鉄心２ａ、２ｂのそれぞれの内周面側に設け、外側巻鉄心１の外周面側に設けた補強部材８ｂとで、内側巻鉄心２ａ、２ｂのヨーク部と外側巻鉄心１のヨーク部との両方をはさみ込んで補強する構成としてもよい。
上記第１の実施例によれば、３相３脚鉄心変圧器において、巻鉄心のヨーク部５における自重等による変形が抑えられ、ラップ部４の剥がれも防止されて巻鉄心の磁気特性の劣化が抑えられる。このため、変圧器の鉄損や騒音の増大も抑えられる。
【０００６】
図２は、本発明の第２の実施例を示す図である。
本実施例は、アモルファス材を積層して成る巻鉄心を用いた３相５脚鉄心変圧器の場合の構成例である。
図２において、２ａ_１、２ａ_２、２ａ_３、２ａ_４は巻鉄心、３ａ、３ｂ、３ｃはコイル、４ａ_１、４ａ_２、４ａ_３、４ａ_４はそれぞれ、巻鉄心２ａ_１、２ａ_２、２ａ_３、２ａ_４において積層したアモルファス材の端部のつなぎ目部分を互いに周方向にずらしたラップ部、５ａ_１、５ａ_２、５ａ_３、５ａ_４、５ａ_５、５ａ_６、５ａ_７、５ａ_８はそれぞれ、巻鉄心２ａ_１、２ａ_２、２ａ_３、２ａ_４のヨーク部、７ａ_１は巻鉄心２ａ_１のコア部（コイル３ａ内に挿入される部分）、７ａ_２は巻鉄心２ａ_２のコア部（コイル３ａ内に挿入される部分）、７ａ_３は巻鉄心２ａ_２のコア部（コイル３ｂ内に挿入される部分）、７ａ_４は巻鉄心２ａ_３のコア部（コイル３ｂ内に挿入される部分）、７ａ_５は巻鉄心２ａ_３のコア部（コイル３ｃ内に挿入される部分）、７ａ_６は巻鉄心２ａ_４のコア部（コイル３ｃ内に挿入される部分）、８ａ_１、８ａ_２、８ａ_３、８ａ_４、８ａ_５、８ａ_６、８ａ_７、８ａ_８はそれぞれ、巻鉄心２ａ_１、２ａ_２、２ａ_３、２ａ_４のヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４、５ａ_５、５ａ_６、５ａ_７、５ａ_８の内周面側に設けられた板状の補強部材、８ｃ_１は、ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４の外周面側に共通的に設けられた１個の板状の補強部材、８ｃ_２は、ヨーク部５ａ_５、５ａ_６、５ａ_７、５ａ_８の外周面側に共通的に設けられた１個の板状の補強部材である。本第２の実施例においても、図の上方が変圧器の上部側、図の下方が変圧器の下部側で、Ｇの方向に重力が作用するものとする。製作時、巻鉄心２ａ_１はコイル３ａに挿入された後、ラップ部４ａ_１で磁気回路的に接続されて環状にされ、巻鉄心２ａ_２はコイル３ａ、３ｂに挿入された後、ラップ部４ａ_２で磁気回路的に接続されて環状にされ、巻鉄心２ａ_３はコイル３ｂ、３ｃに挿入された後、ラップ部４ａ_３で磁気回路的に接続されて環状にされ、巻鉄心２ａ_４はコイル３ｃに挿入された後、ラップ部４ａ_４で磁気回路的に接続されて環状にされる。本実施例の変圧器においても、上記各ラップ部は、該それぞれの巻鉄心でコイル下方のヨーク部に設けられる。かかる構成において、各補強部材は、各ヨーク部をはさんで巻鉄心の該ヨーク部におけるアモルファス材積層方向の強度を補い、巻鉄心の特にヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４、５ａ_５、５ａ_６、５ａ_７、５ａ_８における変形、特に自重等による重力方向の変形、すなわちアモルファス材積層方向の変形を抑える。
上記第２の実施例によれば、３相５脚鉄心変圧器において、各巻鉄心の各ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４、５ａ_５、５ａ_６、５ａ_７、５ａ_８における自重等による変形が抑えられる。これによって、各ラップ部４ａ_１、４ａ_２、４ａ_３、４ａ_４の剥がれも防止され、巻鉄心の磁気特性の劣化が抑えられ、変圧器の鉄損や騒音の増大も抑えられる。また、補強部材８ｃ_１、８ｃ_２をそれぞれ、ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４、ヨーク部５ａ_５、５ａ_６、５ａ_７、５ａ_８に共用する構成のため、補強部材の部品点数を少なくすることができる。
【０００７】
図３は、本発明の第３の実施例を示す図ある。
本実施例は、Ｕ字状の断面を有する補強部材を用いる場合の例である。
図３において、８ｄはＵ字状の断面を有する補強部材である。他部の構成は、上記第１の実施例の場合と同様である。補強部材８ｄを外側巻鉄心１のヨーク部５に、該補強部材８ｄの３つの板状部分８ｄ_１、８ｄ_２、８ｄ_３がそれぞれ、該ヨーク部５の内周面側と外周面側とアモルファス材積層方向とに配されるようにして設ける。補強部材８ｄで補強されたヨーク部５内にラップ部が位置している。板状部分８ｄ_１、８ｄ_２は、該板状部分の厚さ方向の曲げ剛性により、外側巻鉄心１のヨーク部５における変形を抑え、板状部分８ｄ_３は、その板状部分平面に沿う方向の曲げ剛性により、外側巻鉄心１のヨーク部５における変形を抑える。かかるＵ字状断面の補強部材は、ヨーク部５'にも設けてもよいし、図１の構成における内側巻鉄心２ａ、２ｂのそれぞれのヨーク部にも設けるようにしてもよい。また、内側巻鉄心２ａ、２ｂのそれぞれの内周面側に板状部分８ｄ_１、外側巻鉄心１の外周面側に板状部分８ｄ_２が配されるようにし、内側巻鉄心２ａ、２ｂのヨーク部と外側巻鉄心１のヨーク部との両方をはさんで補強する構成としてもよい。
本第３の実施例構成によれば、板状部分８ｄ_３を有した構成のため、高い剛性によってヨーク部を補強でき、巻鉄心の変形を抑えられる。これによって、ラップ部の剥がれも防止でき、巻鉄心の磁気特性の劣化が抑えられ、変圧器の鉄損や騒音の増大も抑えられる。また、板状部分８ｄ_１、８ｄ_２、８ｄ_３が一体状に構成されているため、補強部材の部品点数を少なくすることもできる。さらに、ヨーク部への補強部材の組込みの作業性も改善できる。これらの結果、変圧器のコスト低減も可能となる。
【０００８】
図４は、本発明の第４の実施例を示す図である。
本実施例は、Ｌ字状の断面を有する補強部材を用いる場合の構成例である。
図４（ａ）は補強部材、図４（ｂ）は、該補強部材によるヨーク部５の補強状態を示す。図４において、８ｅ_１、８ｅ_２はそれぞれ、Ｌ字状の断面を有する補強部材、８ｅ_１１、８ｅ_１２は補強部材８ｅ_１の２つの板状部分、８ｅ_２１、８ｅ_２２は補強部材８ｅ_２の２つの板状部分である。他部の構成は、上記第１の実施例の場合と同様であるとする。補強部材８ｅ_１の板状部分８ｅ_１１と補強部材８ｅ_２の板状部分８ｅ_２１がそれぞれ、ヨーク部５の外周面側、内周面側に配され、補強部材８ｅ_１の板状部分８ｅ_１２と補強部材８ｅ_２の板状部分８ｅ_２２が、ヨーク部５のアモルファス材積層方向に配される。補強部材８ｅ_１、８ｅ_２で補強されたヨーク部５内にラップ部が位置している。板状部分８ｅ_１１、８ｅ_２１は、該板状部分の厚さ方向の曲げ剛性により、巻鉄心１のヨーク部５における変形を抑え、板状部分８ｅ_１２、８ｅ_２２は、その板状部分平面に沿う方向の曲げ剛性により、巻鉄心１のヨーク部５における変形を抑える。かかるＬ字状断面の補強部材は、例えば、ヨーク部５'側にも設けてもよいし、図１の構成における内側巻鉄心２ａ、２ｂのそれぞれのヨーク部にも設けるようにしてもよい。また、内側巻鉄心２ａ、２ｂのそれぞれのヨーク部の内周面側に補強部材８ｅ_２の板状部分８ｅ_２１、外側巻鉄心１のヨーク部の外周面側に補強部材８ｅ_１の板状部分８ｅ_１１が配されるようにし、内側巻鉄心２ａ、２ｂのヨーク部と外側巻鉄心１のヨーク部との両方を板状部分８ｅ_２１、８ｅ_１１ではさんで補強する構成としてもよい。
本第４の実施例構成によれば、板状部分８ｅ_１２、８ｅ_２２を有する構成のため、高い剛性によってヨーク部を補強でき、巻鉄心１の該ヨーク部における変形を抑えられる。これによって、ラップ部の剥がれも防止でき、巻鉄心の磁気特性の劣化が抑えられ、変圧器の鉄損や騒音の増大も抑えられる。また、補強部材の部品点数を少なくすることができる。ヨーク部への補強部材の組込みの作業性も改善できる。これらの結果、変圧器のコスト低減も可能となる。
【０００９】
図５は、本発明の第５の実施例を示す図である。
本実施例は、３相５脚鉄心変圧器の場合であって、Ｕ字状の断面を有する補強部材を用いる場合の構成例である。
図５において、２ａ_１、２ａ_２、２ａ_３、２ａ_４は巻鉄心、５ａ_１、５ａ_２、５ａ_３、５ａ_４、５ａ_５、５ａ_６、５ａ_７、５ａ_８はそれぞれ、巻鉄心２ａ_１、２ａ_２、２ａ_３、２ａ_４のヨーク部、８ａ_１、８ａ_２、８ａ_３、８ａ_４はそれぞれ、巻鉄心２ａ_１、２ａ_２、２ａ_３、２ａ_４のヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４の内周面側に設けられた板状の補強部材、８ｆは、ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４の外周面側に共通的に設けられた１個のＵ字状断面の補強部材、８ｆ_１、８ｆ_２、８ｆ_３は、補強部材８ｆの３つの板状部分、９は固定用部材としてのテープである。本第５の実施例においても、ヨーク部５ａ_５、５ａ_６、５ａ_７、５ａ_８側が変圧器の上部側、ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４側が変圧器の下部側であり、設置状態において下部方向に重力が作用する。各巻鉄心内におけるラップ部は、ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４側に設けられる。補強部材８ｆの板状部分８ｆ_１と８ｆ_３がそれぞれ、ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４のアモルファス材積層方向に配され、補強部材８ｆの板状部分８ｆ_２が該ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４の外周面側に配される。補強部材８ａ_１、８ａ_２、８ａ_３、８ａ_４と補強部材８ｆの周りにはテープ９が設けられ、補強部材８ａ_１、８ａ_２、８ａ_３、８ａ_４、８ｆをそれぞれ該当するヨーク部に固定している。Ｕ字状断面を有する補強部材８ｆの板状部分８ｆ_２は、該板状部分の厚さ方向の曲げ剛性により、各巻鉄心の各ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４における変形を抑え、板状部分８ｆ_１、８ｆ_３は、その板状部分平面に沿う方向の曲げ剛性により、各巻鉄心の該各ヨーク部における変形を抑える。かかる８ａ_１、８ａ_２、８ａ_３、８ａ_４と補強部材８ｆを、ヨーク部５'側にも設けるようにしてもよい。
上記第５の実施例によれば、３相５脚鉄心変圧器において、各巻鉄心の各ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４における自重等による変形が抑えられる。これによって、各巻鉄心のラップ部の剥がれも防止され、巻鉄心の磁気特性の劣化が抑えられ、変圧器の鉄損や騒音の増大も抑えられる。特に、補強部材８ｆが板状部分８ｆ_１、８ｆ_３を有するため、ヨーク部に対する補強強度を高められる。また、補強部材８ｆを、ヨーク部５ａ_１、５ａ_２、５ａ_３、５ａ_４に共用する構成のため、補強部材の部品点数を少なくすることができる。
【００１０】
なお、上記各実施例では、補強部材の板状部分は、平坦な表面を有する構成例を図示したが、本発明はこれに限定されず、該板状部分には、凸状の部分や凹状の部分があってもよい。また、板状部分の平面内に、例えば、欠けた状態の部分や穴状の部分を有していてもよい。各巻鉄心のラップ部も、補強部材で補強するヨーク部に位置していなくてもよい。さらには、巻鉄心が、ラップ部を備えず、アモルファス材を渦巻状に連続的に巻き回して形成されたものであってもよい。変圧器も、３相３脚鉄心変圧器や３相５脚鉄心変圧器に限定されない。また、本発明の技術は、巻鉄心がアモルファス材以外の磁性材で構成される場合にも適用可能である。
【００１１】
【発明の効果】
本発明によれば、変圧器において、ヨーク部を補強して巻鉄心の厚さ全体にわたる変形を抑えることができ、巻鉄心の磁気特性の劣化を抑えることができる。騒音の増大も抑えることが可能となる。
【図面の簡単な説明】
【図１】本発明の第１の実施例を示す図である。
【図２】本発明の第２の実施例を示す図である。
【図３】本発明の第３の実施例を示す図である。
【図４】本発明の第４の実施例を示す図である。
【図５】本発明の第５の実施例を示す図である。
【図６】巻鉄心のヨーク部におけるラップ部の剥がれの説明図である。
【図７】ラップ部の剥がれを防止する従来技術の例を示す図である。
【図８】図７の従来技術におけるヨーク部変形の説明図である。
【符号の説明】
１、１'…外側巻鉄心、２ａ、２ｂ…内側巻鉄心、２ａ_１、２ａ_２、２ａ_３、２ａ_４…巻鉄心、３ａ、３ｂ、３ｃ…コイル、４、４'、４ａ、４ｂ、４ａ_１、４ａ_２、４ａ_３、４ａ_４…ラップ部、５、５'、５ａ_１、５ａ_２、５ａ_３、５ａ_４、５ａ_５、５ａ_６、５ａ_７、５ａ_８…ヨーク部、６、６'…角部、７ａ、７ｂ、７ａ_１、７ａ_２、７ａ_３、７ａ_４、７ａ_５、７ａ_６…コア部、８ａ、８ｂ、８ｃ_１、８ｃ_２、８ａ_１、８ａ_２、８ａ_３、８ａ_４、８ａ_５、８ａ_６、８ａ_７、８ａ_８、８ｄ、８ｅ_１、８ｅ_２、８ｆ…補強部材、９、１１…テープ、１２、１２'…バンド。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a transformer using a wound iron core laminated with amorphous materials.
[0002]
[Prior art]
Conventionally, for example, there is a single-phase transformer as a transformer using an amorphous (amorphous magnetic alloy) ribbon-like material (hereinafter referred to as an amorphous material) for a wound iron core. The single-phase transformer has an annular structure in which laminated amorphous materials are passed through a coil and are connected by wrapping both ends. In the wound iron core having such a configuration, as shown in FIG. 6, the lap portion 4 ′ is likely to be peeled off, and in order to prevent this, as shown in FIG. 7, a silicon steel plate 10 is wound around the outer periphery of the core 1 ′. The silicon steel plate 10 is turned and fixed by tape 11 or welding or tightened by a band 12 'so as to suppress the displacement of the wrap portion 4'.
Japanese Patent Laid-Open No. 10-41146 discloses a transformer using a three-phase, three-legged iron core, in which a reinforcing plate is provided between the inner and outer winding cores, and the outer corner and outer winding core of the inner winding core. Describes a technique for preventing slack in the ribbon of the amorphous magnetic alloy near the inner periphery of the outer wound core due to the gap between the inner periphery and the outer periphery. There is no description of deformation of the wound core based on its own weight.
[0003]
[Problems to be solved by the invention]
The amorphous material has low rigidity and is easily deformed. For this reason, even in the state of the laminated iron core, the yoke portion of the wound iron core easily deforms due to its own weight or the like over the entire thickness of the wound iron core in the lamination direction of the amorphous material. In this case, the deformation becomes significant. Deformation of the wound core of the yoke part deteriorates the magnetic characteristics of the entire wound core 1 ′, and increases the iron loss and noise of the transformer. FIG. 8 shows an example of deformation of the yoke part 5 in a configuration in which, for example, a silicon steel plate or the like is wound around the outer periphery of the wound core 1 ′ having the long yoke part 5 and further tightened with a band. The yoke portion 5 is deformed into a wave shape by its own weight regardless of the tightening state by the band, and the deformation causes the lap portion 4 ′ to easily suffer from problems such as peeling or overlapping. The peeling or overlapping of the wrap portion 4 'also deteriorates the magnetic characteristics of the wound core and increases the iron loss and noise of the transformer. Even when the wrap portion is not provided, wavy deformation is caused by gravity, the magnetic properties of the wound core are deteriorated, and the iron loss and noise of the transformer are increased. The technique described in Japanese Patent Laid-Open No. 10-41146 is only within a range that prevents only the thin ribbon of the amorphous magnetic alloy near the inner periphery of the outer wound core, and the wound core due to its own weight or the like. It is considered that it cannot be a sufficient countermeasure technique for preventing deformation throughout the thickness of the film.
In view of the above-mentioned prior art, the problem of the present invention is to suppress the deformation in the stacking direction of the yoke portion of the wound core and suppress the deterioration of the magnetic characteristics in the transformer using the wound core laminated with the amorphous material. It is to be.
An object of the present invention is to provide a technique capable of solving such problems.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the present invention, in a transformer using a wound iron core in which amorphous materials are laminated, basically, a reinforcing member having a plate-like portion is provided in the yoke part of the wound core, and the yoke part Is reinforced over the entire thickness in the amorphous material stacking direction to suppress at least deformation of the wound core in the amorphous material stacking direction. Specifically, as a transformer configured by using a wound iron core formed by laminating thin strip-shaped amorphous materials , (1) a lap portion in which the end portions of the amorphous material are overlapped with each other in the circumferential direction is a yoke portion. a plurality of annular wound core which is located in: (applicable example code _5a 1 _~5a ₄₎ forming a magnetic circuit of a plurality of annular: and (applicable example code _2a 1 _~2a _4), the plurality of annular windings a plurality of yoke portion of which are positioned, the lap portion of the core: the first reinforcing member (applicable examples of a plurality of plate-like provided on each of the inner circumferential surface side (corresponding example code 5a 1 _{to 5 a} ₄₎ : a code _8a 1 ~8a _4), of the plurality of annular wound core, the outer peripheral surface side of the plurality of yoke portions that the lap portion is positioned, the first in between the yoke portions of the plurality of The plurality of yoke portions and the plurality of first reinforcing members facing the reinforcing member A second reinforcing member (corresponding example: reference numerals 8c ₁ and 8f) provided in common, and the first and second reinforcing members are a plurality of yokes in which the lap portion is located. The plurality of yoke portions where the lap portions are positioned are reinforced by fixing the yoke portions to the side of the yoke portions with the portions interposed therebetween . (2) In the above (1), the second reinforcing member has a U-shaped cross section, on the outer peripheral surface side of the plurality of yoke portions where the lap portions are positioned, of the plurality of annular wound cores. It is set as the structure (corresponding Example: code | symbol 8f) provided with the inner surface side of this U-shaped cross section facing each other. (3) In the above (1) or (2), the first and second reinforcing members are further provided around the first and second reinforcing members, and the first and second reinforcing members are provided. However, it has a configuration provided with a tape (corresponding example: reference numeral 9) that is fixed to the yoke portion side with the plurality of yoke portions sandwiched therebetween .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a first embodiment of a transformer according to the present invention.
The present embodiment is a configuration example in the case of a three-phase three-legged core transformer using a wound core formed by laminating amorphous materials.
Fig.1 (a) is a side view which shows the structure which combined two inner volume iron cores and one outer volume iron core, FIG.1 (b) is a perspective view of an outer volume iron core. In FIG. 1, 1 is an outer wound core, 2a and 2b are inner wound cores, 3a, 3b and 3c are coils, and 4 is a joint between the ends of the amorphous material laminated on the outer wound core 1 in the circumferential direction. The wrap portions 4a and 4b are wrap portions in which the joint portions of the ends of the amorphous material laminated in the inner wound cores 2a and 2b are shifted in the circumferential direction, 5 and 5 'are yoke portions of the outer wound core 1, 6 is a corner portion, 7a is a core portion of the outer wound core 1 (portion inserted into the coil 3a), 7b is a core portion of the outer wound core 1 (portion inserted into the coil 3c), 8a and 8b. Is a reinforcing member, 9 is a tape as a fixing member that reinforces the reinforcing members 8a and 8b and fixes the reinforcing members 8a and 8b to the yoke 5 side, and 12 is a band as a fixing member. The upper side of the figure is the upper side of the transformer, and the lower side of the figure is the lower side of the transformer, and gravity acts in the direction of G. At the time of production, after the inner wound core 2a is inserted into the coils 3a and 3b, it is connected in a magnetic circuit with the wrap portion 4a to form an annular shape, and the inner wound core 2b is inserted into the coils 3b and 3c, The outer winding core 1 is inserted into the coils 3a and 3c outside the inner winding cores 2a and 2b, and is then magnetically connected to the wrapping section 4 in a magnetic circuit manner. Connected to make a ring. In the transformer of the present embodiment, each of the wrap portions is provided in a yoke portion below the coil in each wound core. The reinforcing members 8a and 8b each have a plate shape, the reinforcing member 8a is disposed on the inner peripheral surface side of the yoke portion 5 of the outer wound core 1, and the reinforcing member 8b is disposed on the outer peripheral surface side of the yoke portion 5. In particular, the strength of the yoke portion in the direction of lamination of the amorphous material is supplemented by sandwiching the yoke portion 5 with both reinforcing members. The reinforcing member 8a is disposed, for example, at the outer peripheral portion position of the inner wound cores 2a and 2b before the outer wound core 1 is formed in an annular shape. The tape 9 fixes the reinforcing members 8a and 8b to the yoke portion 5 or reinforces the reinforcing members 8a and 8b. The tape 9 may be provided on the reinforcing plate 8a in advance. The band 12 is wound around the outer wound core 1, and the reinforcing member 8 b is fixed to the yoke portion 5, or the outer wound core 1 is reinforced. With the configuration in which the reinforcing members 8a and 8b are arranged, deformation in the gravity direction due to the weight of the yoke portion 5 of the wound iron core, that is, deformation in the amorphous material stacking direction is suppressed. The fixing member is not limited to the tape described above, and a string-like member may be used, or a screw or bolt made of an insulating material, or a member subjected to an insulation treatment may be used. Moreover, in the structure of FIG. 1, although it was set as the structure which provided the reinforcement members 8a and 8b only in the yoke part 5 side of the outer winding core 1, you may provide in the yoke part 5 'side in addition to this, Or you may make it provide also in each yoke part of the inner side winding cores 2a and 2b, or provide the reinforcement member 8a in each inner peripheral surface side of the inner side winding cores 2a and 2b, and the outer peripheral surface of the outer side winding core 1 It is good also as a structure which inserts and reinforces both the yoke part of the inner side wound iron cores 2a and 2b, and the yoke part of the outer side wound iron core 1 with the reinforcement member 8b provided in the side.
According to the first embodiment, in the three-phase three-legged core transformer, deformation due to its own weight or the like in the yoke portion 5 of the wound core is suppressed, and the wrap portion 4 is prevented from being peeled off, thereby deteriorating the magnetic properties of the wound core. Is suppressed. For this reason, an increase in iron loss and noise of the transformer can be suppressed.
[0006]
FIG. 2 is a diagram showing a second embodiment of the present invention.
This embodiment is a configuration example in the case of a three-phase five-leg iron core transformer using a wound iron core formed by laminating amorphous materials.
In FIG. _{_{_{2, 2a 1, 2a 2,}}} 2a 3, 2a 4 is wound cores, 3a, 3b, 3c _{_{_{coil, 4a 1, 4a 2, 4a}}} 3, 4a 4 respectively, wound cores _2a _1, 2a 2, 2a ₃ , 2 a ₄ , the lap portions 5 a ₁ , 5 a ₂ , 5 a ₃ , 5 a ₄ , 5 a ₅ , 5 a ₆ , 5 a ₇ , and 5 a ₈ are respectively connected to the end portions of the amorphous materials laminated in the circumferential direction. , Wound iron cores 2a ₁ , 2a ₂ , 2a ₃ , 2a ₄ yoke portions, 7a ₁ is a core portion of the wound core 2a ₁ (a portion inserted into the coil 3a), 7a ₂ is a core portion of the wound core 2a ₂ ( Part inserted into the coil 3a), 7a ₃ is the core part of the wound core 2a ₂ (part inserted into the coil 3b), and 7a ₄ is the core part of the wound core 2a ₃ (part inserted into the coil 3b) ), 7a ₅ is wound core 2a The core portion of the (portion inserted into the coil 3c), 7a ₆ is the core of the wound iron core 2a ₄ (portion inserted into the coil _{_{_{3c), 8a 1, 8a 2}}} , 8a 3, 8a 4, 8a 5, 8a ₆ , 8a ₇ , 8a ₈ are respectively the yoke portions 5a ₁ , 5a ₂ , 5a ₃ , 5a ₄ , 5a ₅ , 5a ₆ , 5a ₇ , 5a _{8 of} the wound cores 2a ₁ , 2a ₂ , 2a ₃ , 2a _4. The plate-shaped reinforcing member 8c ₁ provided on the inner peripheral surface side of the steel plate is a _single plate-shaped reinforcing member provided in common on the outer peripheral surface side of the yoke portions 5a ₁ , 5a ₂ , 5a ₃ , 5a _4. member, 8c ₂ includes a yoke portion _{_{_{5a 5, 5a 6, 5a 7}}} , it is one of the plate-like reinforcing member provided in common to the outer peripheral surface of 5a _8. Also in the second embodiment, the upper side of the figure is the upper side of the transformer, the lower side of the figure is the lower side of the transformer, and gravity acts in the direction of G. At the time of manufacture, the wound core 2a ₁ is inserted into the coil 3a and then connected in a magnetic circuit with the wrap portion 4a ₁ to form an annular shape. After the wound core 2a ₂ is inserted into the coils 3a and 3b, the wrap portion 4a. is ₂ is connected the magnetic circuit to the annular, after the wound core 2a ₃ is inserted into the coil 3b, 3c, is connected magnetic circuit to wrap portion 4a ₃ annularly wound core 2a ₄ is a coil after being inserted into 3c, is connected magnetic circuit to wrap portion 4a ₄ are annularly. Also in the transformer of the present embodiment, each of the wrap portions is provided on the yoke portion below the coil with the respective wound cores. In such a configuration, each reinforcing member supplements the strength of the wound iron core in the lamination direction of the amorphous material across each yoke portion, and particularly the yoke portions 5a ₁ , 5a ₂ , 5a ₃ , 5a ₄ , Deformation at 5a ₅ , 5a ₆ , 5a ₇ , 5a ₈ , especially deformation in the direction of gravity due to its own weight, that is, deformation in the amorphous material stacking direction is suppressed.
According to the second embodiment, in the three-phase five-leg iron core transformer, the weights of the yoke portions 5a ₁ , 5a ₂ , 5a ₃ , 5a ₄ , 5a ₅ , 5a ₆ , 5a ₇ , 5a ₈ of each wound iron core are obtained. Deformation due to the above is suppressed. As a result, the wrap portions 4a ₁ , 4a ₂ , 4a ₃ , 4a ₄ are prevented from being peeled off, the deterioration of the magnetic properties of the wound core is suppressed, and the iron loss and noise increase of the transformer are also suppressed. In addition, since the reinforcing members 8c ₁ and 8c ₂ are respectively shared by the yoke portions 5a ₁ , 5a ₂ , 5a ₃ , 5a ₄ , yoke portions 5a ₅ , 5a ₆ , 5a ₇ , 5a ₈ , the components of the reinforcing members The score can be reduced.
[0007]
FIG. 3 is a diagram showing a third embodiment of the present invention.
The present embodiment is an example in the case of using a reinforcing member having a U-shaped cross section.
In FIG. 3, 8d is a reinforcing member having a U-shaped cross section. The configuration of the other parts is the same as in the case of the first embodiment. The reinforcing member 8d is placed on the yoke portion 5 of the outer wound core 1, and the three plate-like portions 8d ₁ , 8d ₂ , 8d _{3 of the} reinforcing member 8d are amorphous on the inner peripheral surface side and outer peripheral surface side of the yoke portion 5, respectively. It is provided so as to be arranged in the material stacking direction. The lap part is located in the yoke part 5 reinforced by the reinforcing member 8d. The plate-like portions 8d ₁ and 8d ₂ suppress deformation in the yoke portion 5 of the outer wound core 1 by the bending rigidity in the thickness direction of the plate-like portions, and the plate-like portion 8d ₃ follows the plate-like portion plane. Due to the bending rigidity in the direction, deformation of the yoke portion 5 of the outer wound core 1 is suppressed. Such a U-shaped cross-section reinforcing member may be provided also in the yoke portion 5 ′, or may be provided in each yoke portion of the inner wound cores 2a and 2b in the configuration of FIG. Further, a plate-like portion 8d ₁ is arranged on the inner peripheral surface side of each of the inner wound cores 2a, 2b, and a plate-like portion 8d ₂ is arranged on the outer peripheral surface side of the outer wound core 1, so that the inner wound cores 2a, 2b A configuration may be adopted in which both the yoke portion and the yoke portion of the outer wound core 1 are reinforced.
According to the configuration of the third embodiment, since the plate portion 8d ₃ is provided, the yoke portion can be reinforced with high rigidity and deformation of the wound core can be suppressed. As a result, peeling of the wrap portion can be prevented, deterioration of the magnetic properties of the wound core can be suppressed, and iron loss and noise increase of the transformer can be suppressed. Further, since the plate-like portions 8d ₁ , 8d ₂ and 8d ₃ are integrally formed, the number of parts of the reinforcing member can be reduced. Furthermore, the workability of incorporating the reinforcing member into the yoke portion can be improved. As a result, the cost of the transformer can be reduced.
[0008]
FIG. 4 is a diagram showing a fourth embodiment of the present invention.
This embodiment is a configuration example in the case of using a reinforcing member having an L-shaped cross section.
FIG. 4A shows a reinforcing member, and FIG. 4B shows a reinforcing state of the yoke portion 5 by the reinforcing member. In FIG. 4, 8e ₁ and 8e ₂ are reinforcement members having an L-shaped cross section, 8e ₁₁ and 8e ₁₂ are two plate-like portions of the reinforcement member 8e ₁ , and 8e ₂₁ and 8e ₂₂ are reinforcement members 8e ₂ . Two plate-like parts. The configuration of the other parts is the same as in the case of the first embodiment. Each plate-like portion _{8e 21} between the plate portion _{8e 11} of the reinforcing member 8e ₁ reinforcing member 8e ₂ is, the outer peripheral surface of the yoke portion 5, arranged on the inner peripheral surface side, the plate-like portion _{8e 12} of the reinforcing member 8e ₁ The plate-like portion 8e ₂₂ of the reinforcing member 8e ₂ is arranged in the amorphous material stacking direction of the yoke portion 5. The lap part is located in the yoke part 5 reinforced by the reinforcing members 8e ₁ and 8e ₂ . The plate-like portions 8e ₁₁ and 8e ₂₁ suppress deformation in the yoke portion 5 of the wound core 1 due to the bending rigidity in the thickness direction of the plate-like portion, and the plate-like portions 8e ₁₂ and 8e ₂₂ Deformation in the yoke portion 5 of the wound iron core 1 is suppressed. Such a reinforcing member having an L-shaped cross section may be provided, for example, on the yoke portion 5 ′ side, or may be provided on each yoke portion of the inner wound cores 2a, 2b in the configuration of FIG. Further, the plate-like portion 8e ₂₁ of the reinforcing member 8e _{2 is provided} on the inner peripheral surface side of each yoke portion of the inner wound cores 2a and 2b, and the plate-like portion of the reinforcing member 8e _{1 is provided} on the outer peripheral surface side of the yoke portion of the outer wound core 1. so 8e ₁₁ is arranged, the inner wound cores 2a, both the yoke portion and the yoke portion of the outer wound core 1 and 2b may be configured to reinforce in's in the plate-like portion _8e 21, _{8e 11.}
According to the configuration of the fourth embodiment, the configuration having the plate-like portions 8e ₁₂ and 8e ₂₂ makes it possible to reinforce the yoke portion with high rigidity and suppress deformation of the wound core 1 in the yoke portion. As a result, peeling of the wrap portion can be prevented, deterioration of the magnetic properties of the wound core can be suppressed, and iron loss and noise increase of the transformer can be suppressed. Further, the number of parts of the reinforcing member can be reduced. The workability of incorporating the reinforcing member into the yoke portion can also be improved. As a result, the cost of the transformer can be reduced.
[0009]
FIG. 5 is a diagram showing a fifth embodiment of the present invention.
The present embodiment is a configuration example in the case of using a reinforcing member having a U-shaped cross section in the case of a three-phase five-leg iron core transformer.
In FIG. 5, 2a ₁ , 2a ₂ , 2a ₃ , 2a ₄ are wound cores, 5a ₁ , 5a ₂ , 5a ₃ , 5a ₄ , 5a ₅ , 5a ₆ , 5a ₇ , 5a ₈ are respectively wound cores 2a ₁ , The yoke portions 2a ₂ , 2a ₃ , 2a ₄ , 8a ₁ , 8a ₂ , 8a ₃ , 8a ₄ are respectively yoke portions 5a ₁ , 5a ₂ , 5a _{3 of the} wound cores 2a ₁ , 2a ₂ , 2a ₃ , 2a _4. , the inner peripheral surface side provided with plate-like reinforcing members 5a _4, 8f includes a yoke portion _{_{_{5a 1, 5a 2, 5a 3}}} , 1 single U-shaped provided in common to the outer peripheral surface of 5a ₄ 8f ₁ , 8f ₂ , 8f ₃ are three plate-like portions of the reinforcing member 8f, and 9 is a tape as a fixing member. In this fifth embodiment, it is a yoke portion _{_{_{5a 5, 5a 6, 5a 7}}} , 5a 8 side transformer upper side yoke portion _{_{_{5a 1, 5a 2, 5a 3}}} , 5a 4 side bottom side of the transformer In the installed state, gravity acts downward. Lap portion of each winding within the iron core, the yoke portion _{_{_{5a 1, 5a 2, 5a 3}}} , provided 5a ₄ side. Plate-like portion 8f ₁ and 8f ₃ each reinforcing members 8f, disposed on the yoke portion _{_{_{5a 1, 5a 2, 5a 3}}} , amorphous material stacking direction of 5a _4, the plate-like portion 8f ₂ is the yoke portion of the reinforcing member 8f _{_{_{5a 1, 5a 2, 5a 3}}} , arranged on the outer peripheral surface of the 5a _4. A tape 9 is provided around the reinforcing members 8a ₁ , 8a ₂ , 8a ₃ , 8a ₄ and the reinforcing member 8f, and the reinforcing members 8a ₁ , 8a ₂ , 8a ₃ , 8a ₄ , 8f are respectively fixed to the corresponding yoke portions. is doing. The plate-like portion 8f ₂ of the reinforcing member 8f having a U-shaped cross section is deformed in each yoke portion 5a ₁ , 5a ₂ , 5a ₃ , 5a ₄ of each wound core by the bending rigidity in the thickness direction of the plate-like portion. The plate-like portions 8f ₁ and 8f ₃ suppress the deformation of each wound iron core at each yoke portion by the bending rigidity in the direction along the plate-like portion plane. Such 8a ₁ , 8a ₂ , 8a ₃ , 8a ₄ and the reinforcing member 8f may be provided also on the yoke part 5 ′ side.
According to an embodiment of the fifth, the 3-phase 5-legged core transformer, deformation due to its own weight in each winding the yoke _5a of the core _1, 5a _2, 5a 3, 5a ₄ is suppressed. As a result, peeling of the wrap portion of each wound core is prevented, deterioration of the magnetic characteristics of the wound core is suppressed, and an increase in iron loss and noise of the transformer is also suppressed. In particular, since the reinforcing member 8f has the plate-like portions 8f ₁ and 8f ₃ , the reinforcing strength for the yoke portion can be increased. Further, the reinforcing member 8f, due to the configuration of sharing the yoke portion _{_{_{5a 1, 5a 2, 5a 3}}} , 5a 4, it is possible to reduce the number of parts of the reinforcing member.
[0010]
In each of the above embodiments, the plate-like portion of the reinforcing member is illustrated as a configuration example having a flat surface. However, the present invention is not limited to this, and the plate-like portion includes a convex portion or a concave shape. There may be a part. Further, for example, a chipped portion or a hole-like portion may be provided in the plane of the plate-like portion. The wrap portion of each wound iron core may not be located at the yoke portion reinforced by the reinforcing member. Furthermore, the wound iron core may not be provided with a wrap portion and may be formed by continuously winding an amorphous material in a spiral shape. The transformer is not limited to a three-phase three-legged core transformer or a three-phase five-legged core transformer. The technology of the present invention can also be applied when the wound iron core is made of a magnetic material other than an amorphous material.
[0011]
【The invention's effect】
According to the present invention, in the transformer, the yoke portion can be reinforced to suppress deformation over the entire thickness of the wound core, and deterioration of the magnetic properties of the wound core can be suppressed. An increase in noise can also be suppressed.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment of the present invention.
FIG. 2 is a diagram showing a second embodiment of the present invention.
FIG. 3 is a diagram showing a third embodiment of the present invention.
FIG. 4 is a diagram showing a fourth embodiment of the present invention.
FIG. 5 is a diagram showing a fifth embodiment of the present invention.
FIG. 6 is an explanatory view of peeling of a lap portion at a yoke portion of a wound iron core.
FIG. 7 is a diagram illustrating an example of a conventional technique for preventing peeling of a lap portion.
8 is an explanatory view of deformation of a yoke part in the prior art of FIG.
[Explanation of symbols]
1,1 '... outer wound core, 2a, 2b ... inner wound _{_{_{core, 2a 1, 2a 2, 2a}}} 3, 2a 4 ... wound core, 3a, 3b, 3c ... coil, 4,4', 4a, 4b, 4a ₁ , 4a ₂ , 4a ₃ , 4a ₄ ... lap part, 5, 5 ′, 5a ₁ , 5a ₂ , 5a ₃ , 5a ₄ , 5a ₅ , 5a ₆ , 5a ₇ , 5a ₈ ... yoke part, 6, 6 ′ ... _{_{_{corners, 7a, 7b, 7a 1,}}} 7a 2, 7a 3, 7a 4, 7a 5, 7a 6 ... core _{_{_{part, 8a, 8b, 8c 1,}}} 8c 2, 8a 1, 8a 2, 8a 3, 8a 4 , 8a ₅ , 8a ₆ , 8a ₇ , 8a ₈ , 8d, 8e ₁ , 8e ₂ , 8f ... reinforcing member, 9, 11 ... tape, 12, 12 '... band.

Claims

A transformer that will be constructed using the wound core formed by laminating a thin strip of amorphous material,
A plurality of annular wound cores in which end portions of the amorphous material are shifted from each other in the circumferential direction and overlapped to form a plurality of annular magnetic circuits in the yoke portion,
A plurality of plate-shaped first reinforcing members provided on the respective inner peripheral surface sides of the plurality of yoke portions where the lap portions are positioned, of the plurality of annular wound cores;
On the outer peripheral surface side of the plurality of yoke portions where the wrap portion is located, the plurality of annular wound cores are opposed to the first reinforcement member with the plurality of yoke portions interposed therebetween, and the plurality of yoke portions. And one second reinforcing member provided in common to the plurality of first reinforcing members,
With
The first and second reinforcing members are fixed to the yoke portions with the plurality of yoke portions where the wrap portions are positioned therebetween, and the plurality of yoke portions where the wrap portions are located are reinforced. A transformer characterized in that it is configured to.

The second reinforcing member has a U-shaped cross section, and the inner surface side of the U-shaped cross section is disposed on the outer peripheral surface side of the plurality of yoke portions where the wrap portions are positioned of the plurality of annular wound cores. The transformer according to claim 1, wherein the transformer is configured to face each other.

The first and second reinforcing members are provided around the first and second reinforcing members, with the first and second reinforcing members sandwiching the yoke portions, and the yoke portion. The transformer according to claim 1 or 2, wherein the transformer is configured to include a tape fixed to the side .