JP4034392B2

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Info

Publication number: JP4034392B2
Application number: JP32456197A
Authority: JP
Inventors: 征支小川; 快充武井
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1997-11-26
Filing date: 1997-11-26
Publication date: 2008-01-16
Anticipated expiration: 2017-11-26
Also published as: JPH11162753A

Description

【０００１】
【発明の属する技術分野】
本発明は、変圧器のタップ巻線に有するタップを無負荷状態で任意のタップを選択可能なタップ選択器の改良に関する。
【０００２】
【従来の技術】
この種の従来のタップ選択器の第１の例を図５〜図７を用いて説明する。図５は、変圧器巻線の結線を示し、ＴＷ１は主巻線、ＴＷ２はタップ巻線、１０は奇数側タップ固定接点群（以下奇数側固定接点群と称する）、１１は偶数側タップ固定接点群（以下偶数側固定接点群と称する）、Ｓ１，Ｓ２は切換スイッチである。
【０００３】
奇数側固定接点群１０は、タップ巻線ＴＷ２の所定位置に電気的に接続されたタップＴ１〜Ｔ８のうち、奇数側タップ（奇数側固定接点）Ｔ１，Ｔ３，Ｔ５，Ｔ７に対して奇数側可動接点Ｍ１が接離可能に配設されている。また偶数側タップ群１１はタップＴ１〜Ｔ８のうち、残りの偶数側タップ（偶数側固定接点）Ｔ２，Ｔ４，Ｔ６，Ｔ８に対して偶数側可動接点Ｍ２が接離可能に配設されている。
【０００４】
可動接点Ｍ１，Ｍ２にそれぞれ直列接続された切換スイッチＳ１，Ｓ２は主巻線ＴＷ１を流れる負荷電流を移す切換スイッチである。
図５は切換スイッチＳ１が閉じ、可動接点Ｍ１が固定接点Ｔ１を選択した状態を示している。固定接点Ｔ２への切換は切換スイッチＳ１が開き、次いで切換スイッチＳ２が閉じ固定接点Ｔ２へ負荷電流を移す。さらに固定接点Ｔ３への切換は、可動接点Ｍ１が無負荷状態で固定接点Ｔ３へ移り、切換スイッチＳ１が閉じ固定接点Ｔ３での運転状態となる。
【０００５】
このように奇数側固定接点群１０は可動接点Ｍ１によって、また偶数側固定接点群１１は可動接点Ｍ２によって順次選択され、要求されたタップ電圧を得るように構成されている。従って、奇数側固定接点群１０と偶数側固定接点群１１は各々１個の可動接点Ｍ１，Ｍ２によって選択動作が行われるため、各々同一平面上に配置する必要がある。
【０００６】
図６（ａ）は絶縁板１上に奇数側固定接点群１０と可動接点Ｍ１（図中太線）を絶縁板近側に、また偶数側固定接点群１１と可動接点Ｍ２を絶縁板側に配置した従来例の上面図であり、図６（ｂ）は図６（ａ）のＣーＤーＥ線に沿って切断した断面図である。
【０００７】
図示しない第１の駆動源により回動可能に構成された駆動絶縁軸２の外周面に、偶数側可動接点支え７が固定され、この可動接点支え７の外周面に、後述する偶数側可動接点Ｍ２が固定されている。
【０００８】
駆動絶縁軸２の外周側に、図示しない第２の駆動源により回動可能に構成された駆動絶縁筒３の外周面に、奇数側可動接点支え６が固定され、可動接点支え６の外周面に集電リング４が固定され、集電リング４に後述する奇数側可動接点Ｍ１が固定されている。
【０００９】
絶縁板１は、集電リング４に近接して水平に配置され、図示しない容器に固定され、絶縁板１には、偶数側固定接点群１１が各々が放射状で等間隔に配置され、偶数側固定接点群１１の一端部がそれぞれ絶縁板１に固定され、偶数側固定接点群１１の他端部が可動接点Ｍ２に摺接可能に構成されている。また、絶縁板１には、奇数側固定接点群１０が各々が放射状で等間隔に配置され、奇数側固定接点群１０の一端部がそれぞれ絶縁板１に固定され、奇数側固定接点群１０の他端部が可動接点Ｍ２に摺接可能に構成されている。
【００１０】
偶数側固定接点群１１はいずれも同一構成で、例えば固定接点Ｔ２のように、断面ほぼコ字形で一端が可動接点Ｍ２に摺接可能で、かつ他端が絶縁板１に固定されている。また、奇数側固定接点群１０はいずれも同一構成で、例えば固定接点Ｔ１のように、断面ほぼコ字形であって、固定接点Ｔ２の垂直方向の高さに比べて低くなるように構成されている。
【００１１】
一方、可動接点Ｍ１，Ｍ２はいずれも同一構成であり、一対の弓形の接触子０１，０２と、両接触子０１，０２が接離可能に連結されたピン０３と、両接触子間に配設された接触子０１，０２同士の接触圧を高めるためのバネ０４とから構成されている。
【００１２】
図７は従来のタップ選択器の第２の例を示す平面図であり、これは絶縁板１上に奇数側タップ群１０、偶数側タップ群１１を２面に分割配置した形態を示している。
【００１３】
【発明が解決しようとする課題】
以上述べた従来の第１の例では、図６から明きらかなように固定接点Ｔ１，Ｔ３，Ｔ５，Ｔ７と、固定接点Ｔ２，Ｔ４，Ｔ６，Ｔ８は垂直高さの異なるものを使用しなければならず、このため全体をコンパクト化する上で支障があり、さらに可動接点Ｍ１，Ｍ２はそれぞれ駆動絶縁筒３、駆動絶縁軸２により可動接点支え６，７を介して支持されるため部品数が多く、コストダウンを図る上で支障があった。
【００１４】
また、従来の第２の例では、図７のように、絶縁板を２面に分割配置したことにより、絶縁板１は２倍の平面積を必要とし、大形化するという課題をかかえていた。
そこで本発明は、部品数を減らし、所定の絶縁距離を損なわずに、コンパクトでコストを削減できるタップ選択器を提供することを目的とする。
【００１５】
【課題を解決するための手段】
前記目的を達成するために、請求項１に対応する発明は、変圧器のタップ巻線に有する複数個のタップに、各々接続され同一円周上に配置された複数の固定接点と、
前記各固定接点に接触しタップ巻線のタップを選択する可動接点を有し、該可動接点を切換えることによりタップ電圧を変更可能にしたタップ選択器において、
前記各固定接点のうち、所定の一つを基準として奇数番目に配置されている固定接点と前記可動接点からなる奇数側タップ群と、
前記各固定接点のうち、前記所定の一つを基準として偶数番目に配置されている固定接点と前記可動接点からなる偶数側タップ群に分割すると共に、前記奇数側タップ群および前記偶数側タップ群を構成する固定接点および可動接点を同一部材で構成し、ほぼ水平になるように固定部位に配設され、かつその円周方向に沿って開口部を形成した絶縁板の一方の面であって、前記開口部に前記奇数側タップ群の固定接点及び可動接点の摺接部を配置し、また該絶縁板の他方の面であって前記開口部に偶数側タップ群の固定接点及び可動接点の摺接部を配置したことを特徴とするタップ選択器である。
【００１６】
前記目的を達成するため、請求項２に対応する発明は、変圧器タップ巻線に電気的に接続された複数のタップに、接離可能に配設された可動接点を駆動手段により切換えることにより、タップ電圧を変更するタップ選択器において、
固定部位に固定された絶縁板と、前記絶縁板の対向する面の一方側であって、前記各タップと電気的に接続され、同一円周上に互いに間隔を存して配設された複数の奇数側固定接点と、
前記絶縁板の対向する面の他方側であって、前記各タップと電気的に接続され、前記奇数側固定接点と同一円周上であって前記奇数側固定接点の相互間でかつ互いに所定間隔を存して配設された複数の偶数側固定接点と、
前記絶縁板のほぼ中央位置に前記絶縁板と直交するように配置され、かつ前記駆動手段により回転可能に支持され外形形状が円形の駆動絶縁棒と、
前記駆動絶縁棒の外周面で前記絶縁板を挟んでそれぞれ固定された奇数側集電リングおよび偶数側集電リングと、
前記奇数側集電リングおよび偶数側集電リングにそれぞれ固定され、前記各奇数側固定接点及び各偶数側固定接点の一端側とそれぞれ摺接可能で同一構成の奇数側可動接点及び偶数側可動接点と、
前記絶縁板の対向する面にそれぞれ固定され、一端側に前記奇数側集電リングおよび偶数側集電リングとそれぞれ摺接可能で前記可動接点と同一構成の奇数側集電子及び偶数側集電子を有し、他端側はそれぞれ負荷側に電気的に接続される奇数側引出端子および偶数側引出端子と、
を具備したことを特徴とするタップ選択器である。
【００１７】
請求項１に対応する発明によれば、水平配置をした場合有利となるよう絶縁板の表面に配置された奇数側タップ群の固定接点、可動接点間の摺動面の真下で、かつ円周方向に沿って絶縁板に開口部を設けたことにより、前記摺動面から出る金属粉が絶縁板に蓄積されるのを防ぐことができる。
請求項２に対応する発明によれば、奇数側タップ群、偶数側タップ群を構成する可動接点、固定接点を同一構成とし、一枚の絶縁板の一方の面に奇数側固定接点群を、また絶縁板の他方の面に偶数側固定接点群を配置し、奇数固定接点群、偶数側固定接点群間の絶縁を絶縁板を介して構成することにより、部品数を減らし、所定の絶縁距離を損なわずに、コンパクトでコストを削減できる。
【００１８】
前記目的を達成するため、請求項３に対応する発明は、前記絶縁板は、固定部位によりほぼ水平になるように配設され、かつ前記可動接点と前記固定接点の摺接部に対応する位置であってその円周方向に沿って開口部を形成したことを特徴とする請求項２記載のタップ選択器である。
【００１９】
請求項３に対応する発明によれば、請求項２の作用に加えて、水平配置をした場合有利となるよう絶縁板の表面に配置された奇数側タップ群の固定接点、可動接点間の摺動面の真下で、かつ円周方向に沿って絶縁板に開口部を設けたことにより、前記摺動面から出る金属粉が絶縁板に蓄積されるのを防ぐことができる。
【００２０】
前記目的を達成するために、請求項４に対応する発明は、前記可動接点および集電子はいずれも同一構成で、通電帯と、接点と、板バネと、取付部材と、保持部材とからなり、前記通電帯は箔状導体を複数枚積層しかつ前記保持部材によりそれぞれ一体に保持しかつ曲げ荷重を受けるように構成した２組からなり、該各通電帯の一端部はそれぞれ前記集電リングおよび前記固定接点に前記取付部材により取り付けられ、該各通電帯の他端部はそれぞれ接点が固着され、該２組の通電帯の接点は前記固定接点および前記集電リングにそれぞれ摺接するように取り付けられ、前記板バネにより前記可動接点と前記固定接点および前記可動接点と前記集電リングの接触力が増すようにしたことを特徴とする請求項２記載のタップ選択器である。
【００２１】
請求項４に対応する発明によれば、請求項２の作用に加えて、可動接点はタップを選択動作する毎にその摺動面に対し円周方向に沿い正逆の曲げ荷重を受けても、保持部材により耐えることが可能となる。
【００２２】
前記目的を達成するために、請求項５に対応する発明は、前記保持部材を薄板成形品で構成したことを特徴とする請求項４記載のタップ選択器である。
請求項５に対応する発明によれば、保持板を薄板成形品で構成することにより、安価に製作できる。
【００２３】
【発明の実施の形態】
以下、本発明の実施形態について、図１〜図４を参照して説明する。
図１（ａ）は本発明の実施形態を示す上面図［図１（ｂ）のＳーＳ線に沿って切断して見た図］であり、図１（ｂ）は図１（ａ）のＡーＡーＡ線およびＡーＡーＢ線に沿って切断した断面図である。
【００２４】
図示しない駆動源例えば駆動電動機により連結された駆動絶縁筒２０の外周面の上段および下段に、それぞれ奇数側集電リング２１および偶数側集電リング２２が挿入され、駆動絶縁筒２０を貫通する固定ピン２３により集電リング２１，２２が駆動絶縁筒２０に固定されている。
【００２５】
集電リング２１，２２の間には、図２に示すように絶縁板１が配設されており、絶縁板１には円形リングの一部を残すように開口部１ａが形成され、かつ開口部１ａの周縁部に、図１に示すようにボルト挿通穴１ｂが複数個形成されている。
【００２６】
絶縁板１の開口部１ａの外周側に、奇数側固定接点Ｔ１，Ｔ３，Ｔ５，Ｔ７（これらを総称して奇数側固定接点群１０と呼ぶ）ならびに偶数側固定接点Ｔ２，Ｔ４，Ｔ６，Ｔ８（これらを総称して偶数側固定接点群１１と呼ぶ）が、以下に述べるように放射状で等間隔に、絶縁台３４を介してボルト３５、ナット３６により配置固定されている。
【００２７】
すなわち、固定接点Ｔ１，Ｔ３，Ｔ５，Ｔ７は、絶縁板１の上面側であって、駆動絶縁筒２０を中心として、放射状でかつ互いに等間隔を存して配置されると共に、後述する可動接点Ｍ１にその先端が摺接可能に設けられている。また、固定接点Ｔ２，Ｔ４，Ｔ６，Ｔ８は、絶縁板１の下面側であって、駆動絶縁筒２０を中心として、放射状でかつ互いに等間隔を存して配置されると共に、あたかも絶縁板１の上面から下面を透視したような状態で固定接点Ｔ１，Ｔ３，Ｔ５，Ｔ７の相互間に位置し、しかも後述する可動接点Ｍ２にその先端が摺接可能に設けられている。
【００２８】
絶縁板１に、これに形成されているボルト挿通穴１ｂ形成けている絶縁台２２を介して奇数側引出導体および偶数側引出導体を取り付けるためのボルト挿通穴１ｂが複数個形成され、さらに駆動絶縁筒２０が遊挿されるように絶縁筒挿入穴１ｃが形成されている。
【００２９】
集電リング２１は、それぞれ円筒状の絶縁筒取付部２１ａと、この絶縁筒取付部２１ａの外周面の軸方向のほぼ中央位置に外周側に延出する円板状の接点取付部２１ｂを備えている。また、集電リング２２は、それぞれ円筒状の絶縁筒取付部２２ａと、この絶縁筒取付部２２ａの外周面の軸方向のほぼ中央位置に外周側に延出する円板状の接点取付部２２ｂを備えている。集電リング２１，２２の接点取付部２１ｂ，２２ｂの上下面にはそれぞれ、以下に述べる可動接点Ｍ１，Ｍ２が間隔筒２４を介してボルト２５、ナット２６により取り付けられている。
【００３０】
可動接点Ｍ１，Ｍ２はいずれも同一構成で、図３および図４に示すように、一対の通電帯２７と、一対の接点２８と、一対の保持部材例えば一対の保持板２９、一対の板バネ３０、一対のサポート３１からなっている。
【００３１】
一対の通電帯２７は、いずれも薄導板例えば銅箔を帯状に形成しかつこれを多数枚積層したもので、この先端側（一端側）の互いに対向する板面には接点２８がそれぞれ固定され、後端側（他端側）にはそれぞれボルト２５に挿通するためのボルト挿通穴（図示せず）が形成されている。
【００３２】
そして、通電帯２７の接点２８の近傍を両側から押圧力を与えるための一対の板バネ３０が配設されると共に、接点２８の近傍を両側から挟持するように、図４（ａ），（ｂ），（ｃ）に示す薄型成形品からなる一対の保持板２９が設けられ、間隔筒２４と、ボルト２５の頭部，ナット２６に当接して設けられている座金３２の間に配設され、板バネ３０に形成されているボルト挿入穴（図示せず）にボルト２５が挿入されている。
【００３３】
なお、各保持板２９の一端部は、集電リング２１，２２の接点取付部２１ｂ，２２ｂに対しては、図３（ａ），（ｂ）、図４（ａ），（ｂ）に示すようにリベット３３により固定されている。
【００３４】
さらに、絶縁板１の開口部１ａが形成されていない位置であって、絶縁板１の上面には絶縁台３７を介して奇数側引出端子３８がボルト３９、ナット４０により固定され、奇数側引出端子３８の集電リング２１と対向する側の端部に、前述の可動接点Ｍ１，Ｍ２と同一構成の奇数側集電子４１がボルト４２、ナット４３により固定され、かつ奇数側集電子４１が集電リング２１の接点取付部２１ｂと摺接可能になっている。また、絶縁板１の下面には絶縁台３７を介して偶数側引出端子４４がボルト３９、ナット４０により固定され、偶数側引出端子４４の集電リング２２と対向する側の端部に、前述の可動接点Ｍ１，Ｍ２と同一構成の偶数側集電子４５がボルト４６、ナット４７により固定され、偶数側引出端子４４が集電リング２２と摺接可能になっている。
【００３５】
以上述べた実施形態によれば、絶縁板１を挟んで奇数側固定接点群１０、偶数側固定接点群１１が配設されているので、前述した図６の従来の技術に比べて、コンパクト化が可能で、部品数が少なくコスト削減が可能になる。図６の従来例では、駆動絶縁軸および駆動絶縁筒によりそれぞれ駆動される可動接点Ｍ１，Ｍ２の取付け高さを異ならせ、該各可動接点と一端が摺接可能で他端が同一絶縁板に支持されるされる奇数側固定接点群１０、偶数側固定接点群１１の垂直距離が異なっているので、コンパクト化が困難で、部品数が駆動絶縁軸、駆動絶縁筒と、２枚の絶縁板１，８と多いことから、この分コスト高となる。
【００３６】
また、本実施形態によれば、ほぼ水平に配設される絶縁板１に円周方向に沿って開口部１ａが形成され、この開口部１ａの上方に可動接点Ｍ１と、これに奇数側タップ群１０の一端が摺接可能に配設され、また開口部１ａの下方に可動接点Ｍ２と、これに偶数側タップ群１１の一端が摺接可能に配設されているので、可動接点Ｍ１と奇数側タップ群１０が摺接する際に生ずる金属粉が絶縁板１上に蓄積されないので、絶縁障害を防ぐことができ、絶縁信頼性を高めることができる。
【００３７】
さらに、可動接点Ｍ１，Ｍ２および集電子４１，４５は、板バネ３０のバネカが有効に作用するように例えば複数の銅箔を積層した通電帯２７の接点２８の近傍を両側から狭持するように保持板２９を設けているので、タップ選択動作する毎に受ける円周方向に沿った正逆の曲げ荷重に耐えることができ、この結果強固な可動接点Ｍ１，Ｍ２および集電子４１，４５を得ることができる。
また、保持板２９は安価な薄型成形品で構成されているので、コストを削減できる。
【００３８】
【発明の効果】
以上説明した本発明によれば、奇数側タップ群、偶数側タップ群を構成する固定接点及び可動接点を同一部材で構成でき、一枚の絶縁板の表・裏、両面に配置してるので、コンパクト化になり、かつ部品数を削減できる結果、安価で、また固定接点及び可動接点から生ずる金属粉が絶縁板に蓄積するのを防ぐことができ、絶縁信頼性を高めたタップ選択器を提供することができる。
【図面の簡単な説明】
【図１】（ａ）は本発明の実施形態の概略構成を示す上面図であり、（ｂ）は（ａ）のＡーＡーＡ線並びにＡーＡーＢ線に沿って切断した断面図。
【図２】図１の絶縁板を示す平面図。
【図３】（ａ）は図１の通電帯および保持板の上面図であり、（ｂ）は（ａ）のＹーＹ線に沿って切断した断面図。
【図４】（ａ）は図１および図３（ｂ）の集電リングと保持板の関係を示す平面図であり、（ｂ）は図４（ａ）のＸーＸ線に沿って切断した断面図であり、（ｃ）は図４（ｂ）の矢印Ｗ方向に見た保持板の正面図。
【図５】通常のタップ選択器の回路図。
【図６】（ａ）は従来のタップ選択器の第１の例を示す上面図であり、（ｂ）は図６（ａ）のＣーＤーＥに沿って切断した断面図。
【図７】従来のタップ選択器の第２の例を示す上面図。
【符号の説明】
１…絶縁板、２…開口部、３，３ａ，３ｂ…集電リング、４…通電帯、５…保持板、６…板バネ、７…接点、８…サポート、９…ボルト、１０…奇数側タップ群、１１…偶数側タップ群、１２…ナット、１３…座金、１４…リベット、２０…駆動絶縁筒、２１…固定ピン、２２…絶縁台、２３…奇数側集電子、２４…偶数側集電子、２５…奇数側引出端子、２６…偶数側引出端子、ＴＷ１…主巻線、ＴＷ２…タップ巻線、Ｍ１…奇数側可動接点、Ｍ２…偶数側可動接点、Ｓ１，Ｓ２…切換スイッチ、Ｔ１，Ｔ３，Ｔ５，Ｔ７…奇数側タップ固定接点、Ｔ２，Ｔ４，Ｔ６，Ｔ８…偶数側タップ固定接点。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a tap selector capable of selecting an arbitrary tap in a no-load state with a tap having a tap winding of a transformer.
[0002]
[Prior art]
A first example of this type of conventional tap selector will be described with reference to FIGS. FIG. 5 shows the wiring of the transformer winding, TW1 is the main winding, TW2 is the tap winding, 10 is the odd-side tap fixed contact group (hereinafter referred to as the odd-side fixed contact group), and 11 is the even-side tap fixing. A contact group (hereinafter referred to as an even-numbered fixed contact group), S1 and S2 are changeover switches.
[0003]
The odd-numbered fixed contact group 10 is an odd-numbered side with respect to the odd-numbered taps (odd-side fixed contacts) T1, T3, T5, and T7 among the taps T1 to T8 electrically connected to a predetermined position of the tap winding TW2. The movable contact M1 is disposed so as to be able to contact and separate. The even-numbered tap group 11 is arranged so that the even-numbered movable contact M2 can be connected to and separated from the remaining even-numbered taps (even-numbered fixed contacts) T2, T4, T6, and T8 among the taps T1 to T8. .
[0004]
The change-over switches S1 and S2 connected in series to the movable contacts M1 and M2, respectively, are change-over switches for transferring a load current flowing through the main winding TW1.
FIG. 5 shows a state where the changeover switch S1 is closed and the movable contact M1 selects the fixed contact T1. For switching to the fixed contact T2, the changeover switch S1 is opened, then the changeover switch S2 is closed, and the load current is transferred to the fixed contact T2. Further, the switching to the fixed contact T3 moves to the fixed contact T3 when the movable contact M1 is in a no-load state, and the changeover switch S1 is closed and the operation state at the fixed contact T3 is established.
[0005]
As described above, the odd-numbered fixed contact group 10 is sequentially selected by the movable contact M1 and the even-numbered fixed contact group 11 is sequentially selected by the movable contact M2 so as to obtain the required tap voltage. Accordingly, the odd-numbered fixed contact group 10 and the even-numbered fixed contact group 11 are selected by one movable contact M1 and M2, respectively, and therefore must be arranged on the same plane.
[0006]
In FIG. 6A, the odd-numbered fixed contact group 10 and the movable contact M1 (thick line in the figure) are arranged on the insulating plate 1 near the insulating plate, and the even-numbered fixed contact group 11 and the movable contact M2 are arranged on the insulating plate side. FIG. 6B is a cross-sectional view taken along line CDE in FIG. 6A.
[0007]
An even-numbered movable contact support 7 is fixed to the outer peripheral surface of the drive insulating shaft 2 configured to be rotatable by a first drive source (not shown), and an even-numbered movable contact described later is fixed to the outer peripheral surface of the movable contact support 7. M2 is fixed.
[0008]
An odd-numbered movable contact support 6 is fixed to an outer peripheral surface of a drive insulating cylinder 3 configured to be rotatable by a second drive source (not shown) on the outer peripheral side of the drive insulating shaft 2. The current collecting ring 4 is fixed to the current collecting ring 4, and an odd-numbered movable contact M <b> 1 described later is fixed to the current collecting ring 4.
[0009]
The insulating plate 1 is disposed horizontally in the vicinity of the current collecting ring 4 and is fixed to a container (not shown). The insulating plate 1 has even-side fixed contact groups 11 arranged radially at equal intervals. One end portion of the fixed contact group 11 is fixed to the insulating plate 1 and the other end portion of the even-numbered fixed contact group 11 is configured to be slidable to the movable contact M2. In addition, odd-numbered fixed contact groups 10 are radially arranged at equal intervals on the insulating plate 1, and one end portions of the odd-numbered fixed contact groups 10 are fixed to the insulating plate 1. The other end is configured to be slidable to the movable contact M2.
[0010]
Each of the even-numbered fixed contact groups 11 has the same configuration. For example, like the fixed contact T2, the cross section is substantially U-shaped, and one end can be slidably contacted with the movable contact M2, and the other end is fixed to the insulating plate 1. The odd-numbered fixed contact group 10 has the same configuration, for example, a fixed contact T1, and has a substantially U-shaped cross section, and is configured to be lower than the vertical height of the fixed contact T2. Yes.
[0011]
On the other hand, the movable contacts M1 and M2 have the same configuration, and are arranged between a pair of arcuate contacts 01 and 02, a pin 03 to which both contacts 01 and 02 are connected so as to be able to contact and separate, and both contacts. It is comprised from the spring 04 for raising the contact pressure of the provided contacts 01 and 02.
[0012]
FIG. 7 is a plan view showing a second example of a conventional tap selector, which shows a form in which an odd-numbered tap group 10 and an even-numbered tap group 11 are divided and arranged on two surfaces on an insulating plate 1. .
[0013]
[Problems to be solved by the invention]
In the first conventional example described above, the fixed contacts T1, T3, T5, T7 and the fixed contacts T2, T4, T6, T8 must have different vertical heights, as is apparent from FIG. For this reason, there is a problem in making the whole compact, and the movable contacts M1 and M2 are supported by the drive insulation cylinder 3 and the drive insulation shaft 2 via the movable contact supports 6 and 7, respectively. There were many problems, and there was an obstacle to cost reduction.
[0014]
Further, in the second conventional example, as shown in FIG. 7, the insulating plate is divided and arranged on two surfaces, so that the insulating plate 1 requires twice the plane area and has the problem of increasing its size. It was.
Therefore, an object of the present invention is to provide a tap selector that is compact and can be reduced in cost without reducing the number of components and without deteriorating a predetermined insulation distance.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the invention corresponding to claim 1 includes a plurality of fixed contacts respectively connected to a plurality of taps included in a tap winding of a transformer and arranged on the same circumference,
In the tap selector that has a movable contact that contacts each of the fixed contacts and selects a tap of the tap winding, and the tap voltage can be changed by switching the movable contact,
Of each of the fixed contacts, an odd-numbered tap group consisting of fixed contacts arranged on an odd number with reference to a predetermined one and the movable contacts,
The fixed contacts are divided into even-numbered tap groups consisting of fixed contacts and movable contacts that are arranged evenly with respect to the predetermined one, and the odd-numbered tap groups and the even-numbered tap groups. The fixed contact and the movable contact constituting the same are composed of the same member , and are disposed on the fixed portion so as to be substantially horizontal and have one surface of the insulating plate formed with an opening along the circumferential direction thereof. the sliding contact portion of the fixed contact and the movable contact of the odd tap groups to the opening arranged, also the insulating plate a other surface of the fixed contact and the movable contact of the even side tap groups to the opening of A tap selector having a sliding contact portion .
[0016]
In order to achieve the above-mentioned object, the invention corresponding to claim 2 is provided by switching a movable contact arranged in a detachable manner to a plurality of taps electrically connected to a transformer tap winding by a driving means. In the tap selector that changes the tap voltage,
A plurality of insulating plates fixed to a fixing portion and one side of the opposing surfaces of the insulating plates, electrically connected to the taps, and spaced apart from each other on the same circumference; Odd-side fixed contacts of
The other side of the opposing surface of the insulating plate, which is electrically connected to each of the taps, is on the same circumference as the odd-numbered fixed contacts, and between the odd-numbered fixed contacts and at a predetermined interval from each other A plurality of even-side fixed contacts arranged in a
A drive insulating rod having a circular outer shape, which is disposed at a substantially central position of the insulating plate so as to be orthogonal to the insulating plate, and is rotatably supported by the driving means;
The odd-numbered side current collecting ring and the even-numbered side current collecting ring that are respectively fixed by sandwiching the insulating plate on the outer peripheral surface of the drive insulating rod;
Each fixed to the odd collector ring and the even-side collector ring, the odd side movable contact and the even side movable with the same configuration at one end and each sliding Sekka ability of each odd-side fixed contact and each even fixed contact Contacts,
The odd-numbered current collector and the even-numbered current collector having the same configuration as the movable contact that are respectively fixed to the opposing surfaces of the insulating plate and can be slidably contacted with the odd-numbered current collecting ring and the even-numbered current collecting ring on one end side . And the other end side is an odd-numbered extraction terminal and an even-numbered extraction terminal each electrically connected to the load side,
It is a tap selector characterized by comprising.
[0017]
According to the invention corresponding to claim 1 , the fixed contact of the odd-numbered tap group arranged on the surface of the insulating plate, which is advantageous in the case of horizontal arrangement, directly below the sliding surface between the movable contacts, and the circumference By providing the opening in the insulating plate along the direction, it is possible to prevent the metal powder from the sliding surface from being accumulated in the insulating plate.
According to the invention corresponding to claim 2, the odd-numbered tap group, the movable contact constituting the even-numbered tap group, and the fixed contact have the same configuration, and the odd-numbered fixed contact group is provided on one surface of one insulating plate. In addition, the even-numbered fixed contact group is arranged on the other surface of the insulating plate, and the insulation between the odd-numbered fixed contact group and the even-numbered fixed contact group is configured via the insulating plate, thereby reducing the number of parts and the predetermined insulation distance. It is compact and can reduce the cost without impairing.
[0018]
In order to achieve the above object, according to a third aspect of the present invention, the insulating plate is disposed so as to be substantially horizontal with the fixed portion , and the position corresponds to the sliding contact portion between the movable contact and the fixed contact. a tap selector for 請 Motomeko 2 wherein you characterized in that an opening is formed along the circumferential direction meet.
[0019]
According to the invention corresponding to claim 3,請 Motomeko in addition to the effect of 2, when the horizontal arrangement advantageously become as fixed contacts odd tap group disposed on the surface of the insulating plate, between the movable contact By providing the opening in the insulating plate directly below the sliding surface and along the circumferential direction, it is possible to prevent the metal powder from the sliding surface from being accumulated in the insulating plate.
[0020]
In order to achieve the above object, the invention corresponding to claim 4 is configured such that the movable contact and the current collector have the same configuration, and include an energization band, a contact, a leaf spring, a mounting member, and a holding member. The energization bands are composed of two sets in which a plurality of foil-like conductors are laminated and held integrally by the holding members and receive bending load, and one end portion of each energization band is the current collecting ring. And the fixed contact is attached to the fixed contact by the mounting member, and the other end of each energization band is fixed to the contact, and the contacts of the two energization bands are in sliding contact with the fixed contact and the current collecting ring, respectively. 3. The tap selector according to claim 2, wherein a contact force of the movable contact and the fixed contact and the movable contact and the current collecting ring is increased by the leaf spring.
[0021]
According to the invention corresponding to claim 4, in addition to the action of claim 2 , the movable contact may be subjected to forward and reverse bending loads along the circumferential direction with respect to its sliding surface every time the tap is selected. It is possible to withstand the holding member.
[0022]
In order to achieve the object, the invention corresponding to claim 5 is the tap selector according to claim 4, wherein the holding member is formed of a thin plate molded product.
According to the invention corresponding to claim 5, it is possible to manufacture the holding plate at a low cost by configuring the holding plate with a thin plate molded product.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1A is a top view showing the embodiment of the present invention [a view taken along the line S-S in FIG. 1B], and FIG. 1B is a view in FIG. It is sectional drawing cut | disconnected along the AA-A line and AA-B line | wire.
[0024]
An odd-numbered current collecting ring 21 and an even-numbered current collecting ring 22 are inserted into the upper and lower stages of the outer peripheral surface of the drive insulating cylinder 20 connected by a drive source (not shown) such as a drive motor, respectively, and fixed through the drive insulating cylinder 20. The current collecting rings 21 and 22 are fixed to the drive insulating cylinder 20 by pins 23.
[0025]
An insulating plate 1 is disposed between the current collecting rings 21 and 22 as shown in FIG. 2, and an opening 1a is formed in the insulating plate 1 so as to leave a part of the circular ring. As shown in FIG. 1, a plurality of bolt insertion holes 1b are formed in the peripheral portion of the portion 1a.
[0026]
On the outer peripheral side of the opening 1a of the insulating plate 1, odd-numbered fixed contacts T1, T3, T5, T7 (these are collectively referred to as an odd-numbered fixed contact group 10) and even-numbered fixed contacts T2, T4, T6, T8. (These are collectively referred to as the even-numbered fixed contact group 11) are arranged and fixed by bolts 35 and nuts 36 through the insulating base 34 at equal intervals in a radial manner as described below.
[0027]
That is, the fixed contacts T1, T3, T5, and T7 are arranged on the upper surface side of the insulating plate 1 in a radial manner at equal intervals around the drive insulating cylinder 20, and movable contacts described later. The tip of M1 is slidably provided. Further, the fixed contacts T2, T4, T6, and T8 are arranged on the lower surface side of the insulating plate 1 and are arranged radially and equidistantly from each other with the drive insulating cylinder 20 as the center. The tip is provided between the fixed contacts T1, T3, T5, and T7 in a state where the bottom surface is seen through from the top surface, and the tip of the movable contact M2 described later is slidably contacted.
[0028]
A plurality of bolt insertion holes 1b for attaching the odd-numbered and even-numbered lead conductors are formed in the insulating plate 1 through the insulating base 22 formed with the bolt insertion holes 1b formed in the insulating plate 1, and further driven. An insulating cylinder insertion hole 1c is formed so that the insulating cylinder 20 is loosely inserted.
[0029]
Each of the current collecting rings 21 includes a cylindrical insulating tube mounting portion 21a and a disk-shaped contact mounting portion 21b extending to the outer peripheral side at a substantially central position in the axial direction of the outer peripheral surface of the insulating tube mounting portion 21a. ing. Each of the current collecting rings 22 includes a cylindrical insulating tube mounting portion 22a and a disk-shaped contact mounting portion 22b extending to the outer peripheral side at a substantially central position in the axial direction of the outer peripheral surface of the insulating tube mounting portion 22a. It has. The movable contacts M1 and M2 described below are attached to the upper and lower surfaces of the contact attachment portions 21b and 22b of the current collecting rings 21 and 22 by bolts 25 and nuts 26 via the interval cylinder 24, respectively.
[0030]
The movable contacts M1 and M2 have the same configuration, and as shown in FIGS. 3 and 4, a pair of energizing bands 27, a pair of contacts 28, a pair of holding members such as a pair of holding plates 29, a pair of leaf springs. 30 and a pair of supports 31.
[0031]
Each of the pair of energizing bands 27 is formed by forming a thin conductive plate, for example, a copper foil into a strip shape and laminating a plurality of them, and contacts 28 are fixed to plate surfaces facing each other on the tip side (one end side). In addition, bolt insertion holes (not shown) for inserting the bolts 25 are formed on the rear end side (the other end side).
[0032]
4A and 4B, a pair of leaf springs 30 for applying a pressing force to the vicinity of the contact point 28 of the energizing band 27 from both sides are provided, and the vicinity of the contact point 28 is sandwiched from both sides. A pair of holding plates 29 made of a thin molded product shown in b) and (c) are provided, and disposed between the spacing cylinder 24 and a washer 32 provided in contact with the head of the bolt 25 and the nut 26. The bolt 25 is inserted into a bolt insertion hole (not shown) formed in the leaf spring 30.
[0033]
One end of each holding plate 29 is shown in FIGS. 3 (a), 3 (b), 4 (a) and 4 (b) with respect to the contact mounting portions 21b and 22b of the current collecting rings 21 and 22. As shown in FIG.
[0034]
Further, the odd-numbered lead terminals 38 are fixed to the upper surface of the insulating plate 1 via the insulating base 37 by bolts 39 and nuts 40 at positions where the openings 1a of the insulating plate 1 are not formed. An odd-side current collector 41 having the same configuration as the above-described movable contacts M1 and M2 is fixed to the end of the terminal 38 on the side facing the current collection ring 21 by a bolt 42 and a nut 43, and the odd-side current collector 41 is collected. The contact mounting portion 21b of the electric ring 21 can be slidably contacted. Further, the even-numbered lead terminal 44 is fixed to the lower surface of the insulating plate 1 by means of bolts 39 and nuts 40 via the insulating base 37, and the end of the even-numbered lead terminal 44 on the side facing the current collecting ring 22 is connected to the above-described portion. The even-side current collector 45 having the same configuration as the movable contacts M1 and M2 is fixed by a bolt 46 and a nut 47, and the even-side lead terminal 44 can be slidably contacted with the current collecting ring 22.
[0035]
According to the embodiment described above, since the odd-numbered fixed contact group 10 and the even-numbered fixed contact group 11 are arranged with the insulating plate 1 interposed therebetween, the size is reduced compared to the conventional technique of FIG. The number of parts is small and the cost can be reduced. In the conventional example of FIG. 6, the mounting heights of the movable contacts M1 and M2 respectively driven by the drive insulating shaft and the drive insulating cylinder are made different so that one end can be slidably contacted with each movable contact and the other end is made the same insulating plate. Since the vertical distances of the odd-numbered fixed contact group 10 and the even-numbered fixed contact group 11 to be supported are different from each other, it is difficult to make it compact, and the number of components is a drive insulation shaft, a drive insulation cylinder, and two insulation plates. Since it is as large as 1, 8, the cost is increased accordingly.
[0036]
Further, according to the present embodiment, the opening 1a is formed along the circumferential direction in the insulating plate 1 arranged substantially horizontally, the movable contact M1 is provided above the opening 1a, and the odd-numbered tap is provided on the opening 1a. One end of the group 10 is slidably disposed, and the movable contact M2 is disposed below the opening 1a, and one end of the even-numbered tap group 11 is slidably disposed on the movable contact M1. Since metal powder generated when the odd-numbered tap groups 10 are in sliding contact with each other is not accumulated on the insulating plate 1, insulation failure can be prevented and insulation reliability can be improved.
[0037]
Further, the movable contacts M1 and M2 and the current collectors 41 and 45 sandwich the vicinity of the contact 28 of the energization band 27 in which, for example, a plurality of copper foils are laminated so that the spring spring of the leaf spring 30 works effectively. Since the holding plate 29 is provided on each side, it can withstand forward and reverse bending loads along the circumferential direction received each time the tap selection operation is performed. As a result, the strong movable contacts M1 and M2 and the current collectors 41 and 45 can be Obtainable.
Further, since the holding plate 29 is made of an inexpensive thin molded product, the cost can be reduced.
[0038]
【The invention's effect】
According to the present invention described above, the odd-numbered tap group, the fixed contact and the movable contact constituting the even-numbered tap group can be configured with the same member, and are arranged on the front and back of one insulating plate, both sides, As a result of being compact and reducing the number of parts, a tap selector with improved insulation reliability can be provided that is inexpensive and prevents accumulation of metal powder from fixed and movable contacts on the insulating plate. can do.
[Brief description of the drawings]
FIG. 1A is a top view showing a schematic configuration of an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line AA-A and line AA-B in FIG. Figure.
2 is a plan view showing the insulating plate of FIG. 1. FIG.
3A is a top view of the energization band and the holding plate of FIG. 1, and FIG. 3B is a cross-sectional view taken along line YY of FIG.
4A is a plan view showing the relationship between the current collecting ring and the holding plate of FIGS. 1 and 3B, and FIG. 4B is cut along the line XX in FIG. 4A. It is sectional drawing which was made, (c) is a front view of the holding | maintenance board seen in the arrow W direction of FIG.4 (b).
FIG. 5 is a circuit diagram of a normal tap selector.
6A is a top view showing a first example of a conventional tap selector, and FIG. 6B is a cross-sectional view taken along CDE in FIG. 6A.
FIG. 7 is a top view showing a second example of a conventional tap selector.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Insulation board, 2 ... Opening part, 3, 3a, 3b ... Current collection ring, 4 ... Current supply band, 5 ... Holding plate, 6 ... Leaf spring, 7 ... Contact, 8 ... Support, 9 ... Bolt, 10 ... Odd number Side tap group, 11 ... Even side tap group, 12 ... Nut, 13 ... Washer, 14 ... Rivet, 20 ... Drive insulation cylinder, 21 ... Fixed pin, 22 ... Insulation base, 23 ... Odd side current collector, 24 ... Even side Current collector, 25 ... Odd side lead terminal, 26 ... Even side lead terminal, TW1 ... Main winding, TW2 ... Tap winding, M1 ... Odd side movable contact, M2 ... Even side movable contact, S1, S2 ... Changeover switch, T1, T3, T5, T7 ... odd side tap fixed contact, T2, T4, T6, T8 ... even side tap fixed contact.

Claims

A plurality of fixed contacts arranged on the same circumference, each connected to a plurality of taps in the tap winding of the transformer;
In the tap selector that has a movable contact that contacts each of the fixed contacts and selects a tap of the tap winding, and the tap voltage can be changed by switching the movable contact,
Of each of the fixed contacts, an odd-numbered tap group consisting of fixed contacts and the movable contacts that are arranged oddly with a predetermined one as a reference,
The fixed contacts are divided into even-numbered tap groups consisting of fixed contacts and movable contacts that are arranged evenly with respect to the predetermined one, and the odd-numbered tap groups and the even-numbered tap groups. The fixed contact and the movable contact constituting the same are composed of the same member , and are disposed on the fixed portion so as to be substantially horizontal, and are formed on one side of the insulating plate having an opening along the circumferential direction thereof. the sliding contact portion of the fixed contact and the movable contact of the odd tap groups to the opening arranged, also the insulating plate a other surface of the fixed contact and the movable contact of the even-numbered tap groups to the opening of A tap selector having a sliding contact portion .

In a tap selector that changes a tap voltage by switching a movable contact that is detachably connected to a plurality of taps electrically connected to a transformer tap winding by a driving means,
A plurality of insulating plates fixed to a fixing portion and one side of the opposing surfaces of the insulating plates, electrically connected to the taps, and arranged on the same circumference with a space between them; Odd-side fixed contacts of
The other side of the opposing surface of the insulating plate, which is electrically connected to each of the taps, is on the same circumference as the odd-numbered fixed contacts, and between the odd-numbered fixed contacts and at a predetermined interval from each other A plurality of even-side fixed contacts arranged in a
A drive insulating rod that is arranged at a substantially central position of the insulating plate so as to be orthogonal to the insulating plate, and is rotatably supported by the driving means, and has a circular outer shape;
An odd-numbered side current collecting ring and an even-numbered side current collecting ring that are respectively fixed by sandwiching the insulating plate on the outer peripheral surface of the drive insulating rod;
Each fixed to the odd collector ring and the even-side collector ring, the odd side movable contact and the even side movable with the same configuration at one end and each sliding Sekka ability of each odd-side fixed contact and each even fixed contact Contacts,
The odd-numbered current collector and the even-numbered current collector having the same configuration as the movable contact that are respectively fixed to the opposing surfaces of the insulating plate and can be slidably contacted with the odd-numbered current collecting ring and the even-numbered current collecting ring on one end side . And the other end side is an odd-numbered extraction terminal and an even-numbered extraction terminal each electrically connected to the load side,
A tap selector characterized by comprising:

The insulating plate is substantially arranged to be horizontal, and that the a position corresponding to the sliding contact portion of the movable contact and the fixed contact along its circumferential direction to form an opening by the fixed site tap selector of 請 Motomeko 2 wherein said.

Each of the movable contact and the current collector has the same configuration, and includes an energization band, a contact, a leaf spring, an attachment member, and a holding member, and the energization band is formed by laminating a plurality of foil-like conductors and the holding member. by respectively held together, and the bending consists of two pairs configured to receive the load, one end of each of current band respectively attached by the mounting member to the collector ring and the fixed contact, each of said conduction band The other end of each of the two is fixedly contacted, and the contacts of the two sets of energization bands are attached so as to be in sliding contact with the fixed contact and the current collecting ring, respectively, and the movable contact, the fixed contact, and the 3. The tap selector according to claim 2, wherein a contact force between the movable contact and the current collecting ring is increased.

The tap selector according to claim 4, wherein the holding member is formed of a thin plate molded product.