JP4827131B2 - Molded transformer - Google Patents

Description

Translated fromJapanese

本発明は、モールド変圧器に関するもので、より具体的には、樹脂材料による成形体（モールド）内に複数のコイルを埋め込み状態に一体化させるようにしたモールド変圧器について直流の高電圧に対する絶縁性の改良に関する。  The present invention relates to a molded transformer. More specifically, the present invention relates to a molded transformer in which a plurality of coils are integrally embedded in a molded body (mold) made of a resin material. It relates to improvement of sex.

これまでの半導体製造装置用の変圧器の場合、一般的に絶縁のためにコイルを収納するケース内にオイルを充填した構成を採っている。これに対し、本発明者が創案した変圧器にあっては、絶縁性を良好に得るため、コイル１およびコイル２を樹脂材料による成形体（モールド）内に埋め込み状態に一体化させ、いわゆるモールド構成にした。１次側，２次側のコイルは、例えば平角線材などの線材を所定に巻き回すことにより形成し、モールドは例えばエポキシ樹脂と充填材との混合樹脂などから形成している。  Conventional transformers for semiconductor manufacturing apparatuses generally employ a configuration in which oil is filled in a case that houses a coil for insulation. On the other hand, in the transformer created by the present inventor, in order to obtain good insulation, thecoil 1 and the coil 2 are integrated in a state of being embedded in a molded body (mold) made of a resin material, so-called a mold. Made the configuration. The primary and secondary coils are formed by, for example, winding a wire such as a flat wire, and the mold is formed of a mixed resin of an epoxy resin and a filler, for example.

半導体製造装置用のモールド変圧器は、使用に際して１次コイル１，２次コイル２の少なくとも一方に直流高電圧が重畳する設定を採ることがあり、直流の高電圧は例えば２００〜３００ｋＶ程度となる。  A mold transformer for a semiconductor manufacturing apparatus may adopt a setting in which a DC high voltage is superimposed on at least one of theprimary coil 1 and the secondary coil 2 when used, and the DC high voltage is, for example, about 200 to 300 kV. .

しかし、そうした使用状況であっても、コイルから延びる引き出し線はブッシングへ結線しているので接続部分が露出し、当該接続部分では放電を起こすことがあり、このためモールドつまり樹脂材料の劣化を招き、絶縁不良になる問題がある。  However, even in such a use situation, the lead wire extending from the coil is connected to the bushing, so that the connection portion is exposed and discharge may occur in the connection portion, which causes deterioration of the mold, that is, the resin material. There is a problem of poor insulation.

コイルへの直流高電圧の重畳は、電圧を適宜に上昇させてオン動作させ、電圧を適宜に降下させてオフ動作させることがある。このオン・オフ動作のため電界の変動があり、モールドの表面では電荷の帯電あるいは放電を起こし、これは高電圧による強い電界に起因することから大きな空電音を伴う。したがって、電荷の帯電，放電による熱や光により、モールドをなす樹脂材料が劣化し、やはり絶縁不良を起こす。  The superimposition of the direct current high voltage on the coil may cause the voltage to rise appropriately to turn on, and the voltage to fall appropriately to turn off. Due to this on / off operation, the electric field fluctuates, and charge or discharge is caused on the surface of the mold, which is caused by a strong electric field due to a high voltage, accompanied by a large static noise. Therefore, the resin material forming the mold deteriorates due to heat and light due to charge charging and discharging, which also causes insulation failure.

この発明は上記した課題を解決するもので、その目的は、直流高電圧に係る電界の変動があってもモールドの表面における電荷の帯電や放電を防止でき、モールドをなす樹脂材料の劣化を防止できて絶縁性を高く得ることができ、直流高電圧が重畳するような使用が良好に行えるモールド変圧器を提供することにある。  The object of the present invention is to solve the above-mentioned problems. The purpose of the present invention is to prevent charging and discharging of electric charges on the surface of the mold even when there is a fluctuation of the electric field related to DC high voltage, and to prevent deterioration of the resin material forming the mold. An object of the present invention is to provide a molded transformer that can obtain high insulation and can be used well so that a high DC voltage is superimposed thereon.

上述した目的を達成するために、本発明に係るモールド変圧器は、１次コイルあるいは２次コイルの少なくとも一方に直流高電圧が重畳し、直流高電圧が重畳する側は樹脂材料による成形体内に埋め込み状態に形成するモールド変圧器において、成形体内に、３相変圧器のための第１相コイルと第２相コイルと第３相コイルとを埋め込み状態に一体化させるとともに、それら各相コイルから延びる引き出し線をブッシングに収容させ、当該ブッシングは成形体から連なり一体に形成し、直流高電圧に対して絶縁を得るため所定全長に多数のフランジを設け、成形体の本体側表面には導電性塗料を塗布して当該塗布表面を接地線へ電気的に接続するようにし、前記１次コイル並びに前記２次コイルの鉄心は、前記成形体に組み付け、前記１次コイルあるいは前記２次コイルのうち直流高電圧が重畳しないコイルは樹脂材料で埋め込むことなく前記成形体に組み付ける構成にする（請求項１）。In order to achieve the above-described object, a molded transformer according to the present invention has a DC high voltage superimposed on at least one of a primary coil or a secondary coil, and the side on which the DC high voltage is superimposed is formed in a molded body made of a resin material. In the molded transformer formed in the embedded state, the first phase coil, the second phase coil, and the third phase coil for the three-phase transformer are integrated in the embedded state in the molded body, and from each of the phase coils. The extended lead wire is accommodated in the bushing, and the bushing is formed integrally with the molded body, and a number of flanges are provided over a predetermined length to obtain insulation against DC high voltage, and the body side surface of the molded body is conductive. the paint was appliedso as to electrically connect the coating surface to the groundline, the core of the primary coil and the secondary coil are assembled to the molded body, the one Tsugiko Le or coils DC high voltage is not superimposed of said secondary coil to the structureassembled to the molded body without embedding a resin material (claim 1).

また、成形体内に、単相変圧器のための単相コイルも含めて埋め込み状態に一体化させる構成とする（請求項２）。  Moreover, it is set as the structure integrated in an embedded state including the single phase coil for a single phase transformer in a molded object.

また、ブッシングの根元は成形体の本体側の外径を太くした略テーパ形状に形成する構成にする（請求項３）。  Further, the base of the bushing is formed in a substantially tapered shape with the outer diameter on the main body side of the molded body being increased (Claim 3).

また、ブッシングの根元に当該部位を周回する溝部を設け、導電性塗料は溝部の底まで到達させて塗布する構成にする（請求項４）。  Further, a groove part that goes around the part is provided at the base of the bushing, and the conductive paint is applied to reach the bottom of the groove part (Claim 4).

前記導電性塗料に替えて、半導電性塗料を用いるようにしてもよい（請求項５）。ここで、半導電性とは、好ましくは数ｋΩの抵抗を保有した導電性の塗料であり、１００Ω〜１０，０００Ωの範囲内とするのがよい。このような半導電塗料は、たとえば、エポキシ樹脂とカーボンを混合したものを用いることで実現できる。半導電性も、一般的に言われている導電体よりは抵抗が大きいものの、通電することができるので、絶縁性の塗料ではないという点で導電性塗料と同様に見ることができるので、以下の説明では、単に「導電性」とのみ記載するが、これらの説明では、いずれも上記の「半導電性」を含むものである。  A semiconductive paint may be used instead of the conductive paint. Here, the semiconductive is preferably a conductive paint having a resistance of several kΩ, and is preferably in the range of 100Ω to 10,000Ω. Such a semiconductive paint can be realized, for example, by using a mixture of epoxy resin and carbon. The semi-conductivity is larger than the generally-known conductor, but it can be energized, so it can be seen in the same way as the conductive paint in that it is not an insulating paint. In this description, only “conductive” is described, but these descriptions include the above “semiconductive”.

係る構成にすることにより本発明では、樹脂材料による成形体（モールド）には各相コイルを埋め込ませるとともに、各相コイルから延びる引き出し線を収容させるブッシングも一体に形成するので、引き出し線の接続部分がモールドに収まり露出せず、したがって、直流高電圧に対して絶縁性を高く得ることができる。そして、モールドの本体側の表面に導電性塗料を塗布し、当該塗布表面は接地線へ電気的に接続するので、モールドの本体側の表面は全域が接地層となり、このため、直流高電圧に係る電界の変動があっても電荷の帯電や放電を防ぐことができる。  With this configuration, in the present invention, each phase coil is embedded in a molded body (mold) made of a resin material, and a bushing that accommodates a lead wire extending from each phase coil is also integrally formed. The portion does not fit in the mold and is not exposed, and therefore, high insulation can be obtained with respect to the DC high voltage. Then, a conductive paint is applied to the surface of the mold main body, and the application surface is electrically connected to the grounding wire, so that the entire surface of the mold main body serves as a grounding layer. Even if there is such a variation in the electric field, charging and discharging of electric charges can be prevented.

また、成形体内に、単相変圧器のための単相コイルも含めて埋め込み状態に一体化させる構成にすることにより、全体を小型化することができる。  Moreover, the whole structure can be reduced in size by adopting a configuration in which a single-phase coil for a single-phase transformer is integrated in an embedded state in the molded body.

また、ブッシングの根元は成形体の本体側の外径を太くした略テーパ形状に形成するので、成形体の形成においては樹脂材料の熱硬化に伴う収縮の応力が分散し、局部的に残留応力が高くなる部位が生じることがなく、ブッシングの根元の機械的な強度を向上できる。したがって、当該根元部分の亀裂などの損傷を防止でき、絶縁性について信頼性を高く保つことができる。  In addition, since the base of the bushing is formed in a substantially tapered shape with the outer diameter on the main body side of the molded body being increased, the shrinkage stress associated with the thermosetting of the resin material is dispersed in the formation of the molded body, and the residual stress is localized. Therefore, the mechanical strength at the base of the bushing can be improved. Therefore, it is possible to prevent damage such as cracks at the base portion, and it is possible to maintain high reliability with respect to insulation.

また、ブッシングの根元には当該部位を周回する溝部を設けて当該溝部の底までを導電性塗膜面つまり接地膜層とするので、非接地側の表面との境界について電界の集中を緩和できる。溝部は断面を略半円形状に形成することが好ましく、境界が穏やかな曲面で連なることは電界の局所的な集中を防止する面で有利になる。  In addition, since the groove part that goes around the part is provided at the base of the bushing and the conductive film surface, that is, the ground film layer, is formed up to the bottom of the groove part, the concentration of the electric field can be reduced at the boundary with the non-ground side surface. . The groove section is preferably formed in a substantially semicircular cross section, and it is advantageous in terms of preventing local concentration of the electric field that the boundary is connected with a gentle curved surface.

本発明に係るモールド変圧器では、樹脂材料による成形体（モールド）には各相コイルを埋め込ませるとともに、各相コイルから延びる引き出し線を収容させるブッシングも一体に形成するので、引き出し線の接続部分がモールドに収まり露出せず、したがって、直流高電圧に対して絶縁性を高く得ることができる。そして、モールドの本体側の表面に導電性塗料を塗布し、当該塗布表面は接地線へ電気的に接続するので、モールドの本体側の表面は全域が接地層となり、このため、直流高電圧に係る電界の変動があっても電荷の帯電や放電を防ぐことができる。その結果、帯電，放電に伴う空電音が生じなく、モールドをなす樹脂材料の劣化を防止でき、絶縁性を高く得ることができ、直流高電圧が重畳するような使用が良好に行える。  In the molded transformer according to the present invention, each phase coil is embedded in a molded body (mold) made of a resin material, and a bushing for accommodating a lead wire extending from each phase coil is integrally formed. Therefore, it is possible to obtain high insulation against direct current high voltage. Then, a conductive paint is applied to the surface of the mold main body, and the application surface is electrically connected to the grounding wire, so that the entire surface of the mold main body serves as a grounding layer. Even if there is such a variation in the electric field, charging and discharging of electric charges can be prevented. As a result, there is no aerodynamic noise associated with charging and discharging, deterioration of the resin material forming the mold can be prevented, high insulation can be obtained, and use such that DC high voltage is superimposed can be performed satisfactorily.

図１は本発明の好適な一実施の形態を示している。本形態において、モールド変圧器は、２次コイルに直流高電圧が重畳し、その直流高電圧が重畳する２次側は樹脂材料による成形体（モールド５）内に埋め込み状態に形成する構成であり、モールド５内に、３相変圧器のための各相２次コイル１２，２２，３２および単相変圧器のための単相２次コイル４２を配置し、さらにモールド５から連なる状態にブッシング６を一体に形成し、モールド５の３相側および単相側とにそれぞれ１次コイルおよび鉄心７が組み付く構成になっている。  FIG. 1 shows a preferred embodiment of the present invention. In this embodiment, the mold transformer has a configuration in which a direct current high voltage is superimposed on the secondary coil, and the secondary side on which the direct current high voltage is superimposed is formed in an embedded state in a molded body (mold 5) made of a resin material. In themold 5, thesecondary coils 12, 22, 32 for the three-phase transformer and the single-phasesecondary coil 42 for the single-phase transformer are arranged, and thebushing 6 is connected to themold 5. Are integrally formed, and the primary coil and theiron core 7 are assembled to the three-phase side and the single-phase side of themold 5, respectively.

２次コイルに重畳することになる直流高電圧は、例えば２００〜３００ｋＶ程度となる。そこで絶縁性を良好に得るため、２次側のコイルはモールド５内に埋め込んでおり、モールド５は、各２次コイルを埋め込んだ筒状部位が順に積み重なっていて、図２に示すように、ｕ相（第１相）の筒状部位１とｖ相（第２相）の筒状部位２とｗ相（第３相）の筒状部位３と単相の筒状部位４とが順に積み重なる形状の本体側からブッシング６が突き出して連なる形状になっている。  The high DC voltage to be superimposed on the secondary coil is, for example, about 200 to 300 kV. Therefore, in order to obtain good insulation, the secondary side coil is embedded in themold 5, and themold 5 has a cylindrical portion in which each secondary coil is embedded in order, as shown in FIG. Thecylindrical part 1 of the u phase (first phase), the cylindrical part 2 of the v phase (second phase), thecylindrical part 3 of the w phase (third phase), and the single-phase cylindrical part 4 are sequentially stacked. The bushing 6 protrudes from the main body side of the shape and is continuous.

各筒状部位１，２，３，４には中央の孔部に、Ｕ相１次コイル１１，Ｖ相１次コイル２１，Ｗ相１次コイル３１，単相１次コイル４１をそれぞれ配置し、さらにそれぞれ中央に鉄心７が配置される。  A U-phaseprimary coil 11, a V-phaseprimary coil 21, a W-phaseprimary coil 31, and a single-phaseprimary coil 41 are arranged in the central hole in eachcylindrical part 1, 2, 3, 4. Further, aniron core 7 is arranged in the center.

１次コイルおよび２次コイルは、平角線材などの線材を巻き回すことにより形成している。モールド５内に埋め込み状態に形成する２次側は、３相変圧器のための各相ではそれぞれ２つのコイルを有し、図３，図４に示すように、２次コイルａおよび２次コイルｂを同心に重ねて形成するが、これら２次コイルａ，ｂに対しては、端縁に絶縁性の帯部材８を配置し、そして導電性テープ９を巻き回して外面の全域を覆い包んで導電性膜層とする構成になっている。  The primary coil and the secondary coil are formed by winding a wire such as a flat wire. The secondary side formed in the embedded state in themold 5 has two coils in each phase for the three-phase transformer, and the secondary coil a and the secondary coil as shown in FIGS. b is formed by concentrically overlapping, but for these secondary coils a and b, aninsulating band member 8 is arranged at the edge, and aconductive tape 9 is wound to cover the entire outer surface. Thus, the structure is a conductive film layer.

帯部材８はゴム材料や樹脂材料等からなり、その断面を半円形に形成してあって２次コイルａ，ｂの端縁と接しない側で緩やかな凸曲面形状を得るようになっている。  Theband member 8 is made of a rubber material, a resin material, or the like, and has a semicircular cross section so that a gentle convex curved surface shape is obtained on the side not in contact with the end edges of the secondary coils a and b. .

導電性テープ９は、例えばカーボン材料からなるカーボンテープとし、モールド５をなす樹脂材料と接着性が良好な材料から形成している。この導電性テープ９による導電性膜層は、当該内側のコイルａあるいはコイルｂの一所と結線して電気的に接続している。  Theconductive tape 9 is a carbon tape made of, for example, a carbon material, and is formed of a resin material that forms themold 5 and a material that has good adhesion. The conductive film layer made of theconductive tape 9 is connected to and electrically connected to one place of the inner coil a or coil b.

モールド５は例えばエポキシ樹脂と充填材との混合樹脂などから形成し、成形には、コイルａ，コイルｂと帯部材８との組み体に対して導電性テープ９を巻き回して外面の全域を覆い包んだ構成物を金型内にセットし、そこへ混合樹脂を注入して埋め込み状態とし、熱硬化させる。なお、モールド５には、１次コイルおよび鉄心７を支持させる金具の取り付け部を設け、１次コイルおよび鉄心７はその金具により所定に組み付けする。  Themold 5 is formed of, for example, a mixed resin of an epoxy resin and a filler. For molding, theconductive tape 9 is wound around the assembly of the coil a, the coil b, and theband member 8 to cover the entire outer surface. The covered structure is set in a mold, and a mixed resin is poured into the mold to be embedded and thermally cured. Themold 5 is provided with a fitting portion for supporting the primary coil and theiron core 7, and the primary coil and theiron core 7 are assembled in a predetermined manner by the fitting.

各相２次コイルから延びる引き出し線はブッシング６に収容させており、ブッシング６には所定の全長に多数のフランジ６０を設け、沿面距離を長くして絶縁性を高めている。そして、モールド５の本体側の表面には導電性塗料５０を塗布し、当該塗布表面を接地線へ電気的に接続している。  Lead wires extending from the secondary coils of each phase are accommodated in thebushing 6, and thebushing 6 is provided with a plurality offlanges 60 with a predetermined total length, and the creeping distance is increased to improve the insulation. And theconductive coating 50 is apply | coated to the surface at the side of the main body of themold 5, and the said application | coating surface is electrically connected to the ground wire.

ブッシング６は、図５に拡大して示すように、その根元についてモールド５の本体側の外径を太くした略テーパ形状に形成し、その略テーパ形状の根元には当該部位を周回する溝部６１を設けている。溝部６１は好ましくは断面を略半円形状に形成する。そして、導電性塗料５０は、モールド５の本体側の表面から溝部６１の底まで到達させるように塗布する。  As shown in an enlarged view in FIG. 5, thebushing 6 is formed in a substantially tapered shape with a thick outer diameter on the main body side of themold 5 at the root, and agroove portion 61 that circulates around the portion at the root of the substantially tapered shape. Is provided. Thegroove 61 preferably has a substantially semicircular cross section. Theconductive paint 50 is applied so as to reach the bottom of thegroove 61 from the surface of themold 5 on the main body side.

このように、本発明に係るモールド変圧器では、樹脂材料による成形体（モールド５）には各相２次コイル１２，２２，３２および単相２次コイル４２を埋め込ませるとともに、それら２次コイルから延びる引き出し線を収容させるブッシング６も一体に形成するので、引き出し線の接続部分がモールド５に収まり露出せず、したがって、直流高電圧に対して絶縁性を高く得ることができる。そして、モールド５の本体側の表面に導電性塗料５０を塗布し、当該塗布表面は接地線へ電気的に接続するので、モールド５の本体側の表面は全域が接地層となり、このため、直流高電圧に係る電界の変動があっても電荷の帯電や放電を防ぐことができる。その結果、帯電，放電に伴う空電音が生じなく、モールド５をなす樹脂材料の劣化を防止でき、絶縁性を高く得ることができ、直流高電圧が重畳するような使用が良好に行える。  As described above, in the molded transformer according to the present invention, thesecondary coils 12, 22, 32 and the single-phasesecondary coil 42 are embedded in the molded body (mold 5) made of a resin material, and these secondary coils are embedded. Since thebushing 6 for accommodating the lead wire extending from is integrally formed, the connection portion of the lead wire does not fit in themold 5 and is not exposed, so that high insulation against DC high voltage can be obtained. Then, theconductive paint 50 is applied to the surface of themold 5 on the main body side, and the application surface is electrically connected to the grounding wire. Therefore, the entire surface of themold 5 on the main body side serves as a grounding layer. Even if there is a variation in the electric field associated with the high voltage, charging and discharging of electric charges can be prevented. As a result, no static noise is generated due to charging and discharging, deterioration of the resin material forming themold 5 can be prevented, high insulation can be obtained, and use such that DC high voltage is superimposed can be performed satisfactorily.

モールド５内には３相変圧器のための構成とともに、単相変圧器のための構成も含めて埋め込み状態に一体化させるので、全体を小型化することができる。また、モールド５には１次コイルおよび鉄心７を支持させる金具の取り付け部を設けるので、１次コイルおよび鉄心７などの構成要素はモールド５に対して金具により所定に組み付けでき、組み立て性がよい。  Since themold 5 is integrated into the embedded state including the configuration for the three-phase transformer and the configuration for the single-phase transformer, the entire size can be reduced. Further, since themold 5 is provided with a fitting portion for supporting the primary coil and theiron core 7, the constituent elements such as the primary coil and theiron core 7 can be assembled to themold 5 with the metal fittings, and the assemblability is good. .

また、ブッシング６の根元はモールド５の本体側の外径を太くした略テーパ形状に形成するので、モールド５の形成においては樹脂材料の熱硬化に伴う収縮の応力が分散し、局部的に残留応力が高くなる部位が生じることがなく、ブッシング６の根元の機械的な強度を向上できる。したがって、当該根元部分の亀裂などの損傷を防止でき、絶縁性について信頼性を高く保つことができる。  Further, since the base of thebushing 6 is formed in a substantially tapered shape with the outer diameter on the main body side of themold 5 increased, the shrinkage stress accompanying the heat curing of the resin material is dispersed in the formation of themold 5 and remains locally. The part where stress becomes high does not occur, and the mechanical strength at the base of thebushing 6 can be improved. Therefore, it is possible to prevent damage such as cracks at the base portion, and it is possible to maintain high reliability with respect to insulation.

また、ブッシング６の根元には当該部位を周回する溝部６１を設けて当該溝部６１の底までを導電性塗膜面つまり接地膜層とするので、非接地側の表面との境界について電界の集中を緩和でき、溝部６１は断面を略半円形状に形成するので境界が穏やかな曲面で連なり、これは電界の局所的な集中を防止する面で有利になる。その結果、直流高電圧に係る電界の変動があっても電荷の帯電や放電を防ぐことができ、帯電，放電に伴う空電音が生じなく、モールド５をなす樹脂材料の劣化を防止でき、直流高電圧に対して絶縁を良好に得ることができる。  Further, since thegroove portion 61 that goes around the portion is provided at the base of thebushing 6 and the bottom of thegroove portion 61 is used as a conductive coating film surface, that is, a grounding film layer, the electric field is concentrated on the boundary with the surface on the non-grounded side. Since the cross section of thegroove 61 is formed in a substantially semicircular shape, the boundary is connected with a curved surface with a gentle boundary, which is advantageous in terms of preventing local concentration of the electric field. As a result, even if there is a variation in the electric field related to the direct current high voltage, it is possible to prevent charge charging and discharging, no static noise associated with charging and discharging occurs, and deterioration of the resin material forming themold 5 can be prevented. Good insulation can be obtained with respect to DC high voltage.

なお、本発明に係る構成としては、図６に示すように、単相変圧器を削除した構成を採ることもよく、モールド５には３相変圧器のための各相コイル１２，２２，３２のみを埋め込み状態に一体化させることもできる。  As shown in FIG. 6, the configuration according to the present invention may be a configuration in which the single-phase transformer is omitted, and themold 5 includes the respective phase coils 12, 22, 32 for the three-phase transformer. It is also possible to integrate only the embedded state.

本発明に係るモールド変圧器の好適な一実施の形態を示す正面図である。1 is a front view showing a preferred embodiment of a molded transformer according to the present invention.モールド部分を示す正面図である。It is a front view which shows a mold part.コイルの埋め込み状態を一部破断して示す側面図である。It is a side view which shows the embedding state of a coil partially broken.コイルの巻き線部分を拡大して示す断面図である。It is sectional drawing which expands and shows the winding part of a coil.ブッシングの根元部分を拡大して示す正面図である。It is a front view which expands and shows the base part of a bushing.モールド部分の他例を示す正面図である。It is a front view which shows the other example of a mold part.

符号の説明Explanation of symbols

１，２，３，４ 筒状部位
５ モールド（成形体）
６ ブッシング
７ 鉄心
８ 帯部材
９ 導電性テープ
１１ Ｕ相１次コイル
１２ ｕ相２次コイル
２１ Ｖ相１次コイル
２２ ｖ相２次コイル
３１ Ｗ相１次コイル
３２ ｗ相２次コイル
４１ 単相１次コイル
４２ 単相２次コイル
５０ 導電性塗料
６０ フランジ
６１ 溝部
ａ，ｂ ２次コイル
1, 2, 3, 4Cylindrical part 5 Mold (molded body)
6 Bushing 7Iron core 8Band member 9Conductive tape 11 U-phaseprimary coil 12 u-phase secondary coil 21 V-phase primary coil 22 v-phase secondary coil 31 W-phase primary coil 32 w-phasesecondary coil 41 Single phasePrimary coil 42 Single-phasesecondary coil 50Conductive paint 60Flange 61 Groove a, b Secondary coil

Claims (5)

Translated fromJapanese

１次コイルあるいは２次コイルの少なくとも一方に直流高電圧が重畳し、直流高電圧が重畳する側は樹脂材料による成形体内に埋め込み状態に形成するモールド変圧器において、
前記成形体内に、３相変圧器のための第１相コイルと第２相コイルと第３相コイルとを埋め込み状態に一体化させるとともに、それら各相コイルから延びる引き出し線をブッシングに収容させ、当該ブッシングは前記成形体から連なり一体に形成し、前記直流高電圧に対して絶縁を得るため所定全長に多数のフランジを設け、前記成形体の本体側表面には導電性塗料を塗布して当該塗布表面を接地線へ電気的に接続するようにし、
前記１次コイル並びに前記２次コイルの鉄心は、前記成形体に組み付け、
前記１次コイルあるいは前記２次コイルのうち直流高電圧が重畳しないコイルは樹脂材料で埋め込むことなく前記成形体に組み付けることを特徴とするモールド変圧器。In a mold transformer in which a DC high voltage is superimposed on at least one of the primary coil or the secondary coil, and the side on which the DC high voltage is superimposed is formed in an embedded state in a molded body made of a resin material.
In the molded body, the first phase coil, the second phase coil, and the third phase coil for the three-phase transformer are integrated in an embedded state, and lead wires extending from the respective phase coils are accommodated in the bushing, The bushing is formed integrally with the molded body, provided with a plurality of flanges over a predetermined length in order to obtain insulation against the DC high voltage, and a conductive paint is applied to the surface of the molded body on the main body side. Makesure that the application surface is electrically connected to the ground wire,
The primary coil and the iron core of the secondary coil are assembled to the molded body,
The molded transformer characterized in that acoil in which a direct current high voltage does not overlap among the primary coil or the secondary coil is assembled to themolded body without being embedded with a resin material . 前記成形体内に、単相変圧器のための単相コイルも含めて埋め込み状態に一体化させることを特徴とする請求項１に記載のモールド変圧器。  The molded transformer according to claim 1, wherein the molded body is integrated in an embedded state including a single-phase coil for the single-phase transformer. 前記ブッシングの根元は前記成形体の本体側の外径を太くした略テーパ形状に形成することを特徴とする請求項１あるいは２の何れかに記載のモールド変圧器。  3. The molded transformer according to claim 1, wherein the base of the bushing is formed in a substantially tapered shape in which an outer diameter on the main body side of the molded body is increased. 前記ブッシングの根元に当該部位を周回する溝部を設け、前記導電性塗料は前記溝部の底まで到達させて塗布することを特徴とする請求項１から３の何れかに記載のモールド変圧器。  The mold transformer according to any one of claims 1 to 3, wherein a groove portion that goes around the portion is provided at a base of the bushing, and the conductive paint is applied to reach the bottom of the groove portion. 前記導電性塗料に替えて、半導電性塗料を用いることを特徴とする請求項１から４のいずれかに記載のモールド変圧器。  The mold transformer according to any one of claims 1 to 4, wherein a semiconductive paint is used instead of the conductive paint.

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