JP2010166060A - Split iron core transformer - Google Patents
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 36
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000004907 flux Effects 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 45
- 239000007924 injection Substances 0.000 claims description 45
- 238000001514 detection method Methods 0.000 claims description 31
- 230000005856 abnormality Effects 0.000 claims description 13
- 230000005284 excitation Effects 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000003449 preventive effect Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract 1
- 238000007689 inspection Methods 0.000 description 10
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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Abstract
Description
本発明は分割鉄心型搬送用トランスに関し、詳しくは、接地線などに容易にクランプすることができるように工夫したものである。 The present invention relates to a split iron core type transfer transformer, and in particular, has been devised so that it can be easily clamped to a ground wire or the like.
従来の絶縁監視装置のシステム構成の一例を図７に示す。同図に示すように、このシステム構成では、変圧器２０１の低圧側の活線２０２、接地相２０３及び活線２０４のうち、接地相２０３には、接地線２０５が接続されており、この接地線２０５に搬送波注入トランス２０６、監視電圧注入トランス２０７、及び検出用変流器２０８を設け、これらに信号搬送装置２０９及び検出装置２１０を接続している。そして、Ｉｇｒ方式では、監視電圧注入トランス２０７により監視電圧を接地線２０５に重畳させて絶縁不良を監視するものであり、監視電圧に対する漏れ電流を検出用変流器２０８で検出し、警報信号を搬送波注入トランス２０６を介して搬送する。この場合、監視電圧注入トランス２０７と搬送波注入トランス２０６を一体化させ、双方の機能を併せ持つ注入トランスを使用する場合もある。一方、Ｉ０方式では、非接地側電線（活線）の絶縁低下による漏れ電流を検出用変流器２０８により検出するものであり、警報信号を搬送するための搬送波注入トランス２０６は必要であるが、監視電圧注入トランス２０７は不要である。なお、このように搬送された警報信号は、受信装置２１１で受信されるが、受信装置２１１には、発信装置又は通報装置２１２が接続又は一体的に設けられている。 An example of the system configuration of a conventional insulation monitoring apparatus is shown in FIG. As shown in the figure, in this system configuration, a ground wire 205 is connected to the ground phase 203 among the live wire 202, the ground phase 203 and the live wire 204 on the low voltage side of the transformer 201. The line 205 is provided with a carrier injection transformer 206, a monitoring voltage injection transformer 207, and a detection current transformer 208, to which a signal carrier 209 and a detection device 210 are connected. In the Igr method, a monitoring voltage is superposed on the ground line 205 by a monitoring voltage injection transformer 207 to monitor insulation failure, a leakage current with respect to the monitoring voltage is detected by a detection current transformer 208, and an alarm signal is output. It is conveyed via a carrier injection transformer 206. In this case, the monitoring voltage injection transformer 207 and the carrier wave injection transformer 206 may be integrated, and an injection transformer having both functions may be used. On the other hand, the I 0 scheme, which is detected by the non-grounded side wire detecting current transformer 208 leakage current due to insulation reduction of (hot), it is necessary carrier injection transformer 206 for conveying an alarm signal However, the monitoring voltage injection transformer 207 is not necessary. The alarm signal thus transported is received by the receiving device 211, and the receiving device 211 is connected or integrally provided with a transmitting device or a reporting device 212.
ここで、搬送波注入トランス２０６、監視電圧注入トランス２０７、及び検出用変流器２０８には、接地線２０５への取り付けを考慮し、分割鉄心型トランスが用いられる場合がある。 Here, a split core transformer may be used for the carrier injection transformer 206, the monitoring voltage injection transformer 207, and the detection current transformer 208 in consideration of attachment to the ground line 205.
このような分割鉄心型トランスは、取り付けが容易ではあるが、分割面の発錆や分割面同士の突き合わせ不良による性能低下が問題となっている。そこで、鉄心の分割面に磁性体ゴムを挿入して固定して水分の浸入を防止したもの（特許文献１参照）が提案されている。また、分割面の取り付けの異常を検出する異常検出テストを行い、検出コイルに電圧を印加・遮断したときに発生する逆起電力の大きさで異常を検出するというものがある（特許文献２参照）。さらに、ヒンジを介して開閉式のクランプ式の分割型電流センサの開閉状態を光センサにより検出するものがある（特許文献３参照）。 Such a split iron core transformer is easy to mount, but there is a problem of performance degradation due to rusting of the split surfaces and poor matching between the split surfaces. In view of this, there has been proposed one in which magnetic rubber is inserted and fixed on the split surface of the iron core to prevent moisture from entering (see Patent Document 1). Also, there is an abnormality detection test for detecting an abnormality in the attachment of the split surface, and detecting an abnormality based on the magnitude of the back electromotive force generated when a voltage is applied to or cut off from the detection coil (see Patent Document 2). ). In addition, there is an optical sensor that detects the open / closed state of an open / close clamp-type split current sensor via a hinge (see Patent Document 3).
しかしながら、何れにしても、作業現場で組み立てた接合不良を、特別な装置を用いることなく、簡便に検出することができるものではない。 However, in any case, it is not possible to easily detect a joint failure assembled at a work site without using a special device.
本発明は、分割型トランスの接合不良を特別な装置を用いることなく、簡便に検出することができる搬送波注入装置、分割鉄心型トランス及びその異常検出方法を提供することを課題とする。 It is an object of the present invention to provide a carrier injection device, a split core transformer, and an abnormality detection method thereof that can easily detect a junction failure of a split transformer without using a special device.
前記課題を解決する本発明の第１の態様は、磁束を導磁する分割型の分割鉄心及び当該分割鉄心に巻装される巻き線を有する搬送用トランスと、この搬送用トランスを接続する接続端子及び当該接続端子に接続した搬送用トランスに搬送波を注入する搬送波注入手段を備えた装置本体とを具備する搬送波注入装置において、前記装置本体に、前記搬送用トランスに流れる励磁電流に比例した電流を電圧に変換する変換手段と、この変換手段で変換した電圧を測定して前記分割鉄心の接合の適否を検出するための検出端子とを設けたことを特徴とする搬送波注入装置にある。 A first aspect of the present invention that solves the above-described problem is a transport transformer having a split-type split core that conducts magnetic flux and a winding wound around the split core, and a connection that connects the transport transformer. A carrier body injection device comprising: a terminal body; and a device body provided with carrier wave injection means for injecting a carrier wave into a carrier transformer connected to the connection terminal. In the carrier body injection device, a current proportional to an excitation current flowing through the carrier transformer in the device body The carrier injection device is provided with a conversion means for converting the voltage into a voltage and a detection terminal for measuring the voltage converted by the conversion means and detecting whether or not the divided core is joined.
かかる第１の態様では、接続端子を介して搬送用トランスに印加される電圧を測定すると共に、検出端子を介して励磁電流に比例した電流を変換した電圧を測定し、両者の比により接合状態の適否を検出する。 In the first aspect, the voltage applied to the transfer transformer via the connection terminal is measured, and the voltage obtained by converting the current proportional to the excitation current is measured via the detection terminal. Detecting the suitability of
本発明の第２の態様は、第１の態様において、前記装置本体が、前記搬送手段が前記搬送波として断続波を注入するモードと、前記搬送用トランスに連続波を印加して前記分割鉄心の接合状態を検出するモードとを切り替える切り替え手段をさらに具備することを特徴とする搬送波注入装置にある。 According to a second aspect of the present invention, in the first aspect, the apparatus main body is configured such that the carrier means injects an intermittent wave as the carrier wave, and a continuous wave is applied to the carrier transformer to The carrier injection device further includes switching means for switching between modes for detecting the joining state.
かかる第２の態様では、切り替え手段により連続波に切り替えて接合状態の適否を検出することができる。 In the second aspect, it is possible to detect the suitability of the joined state by switching to a continuous wave by the switching means.
本発明の第３の態様は、第１又は２の態様において、前記接続端子間の電圧と、前記検出端子間の電圧との比により、前記分割鉄心の接合状態の適否を判断することを特徴とする搬送波注入装置にある。 According to a third aspect of the present invention, in the first or second aspect, whether or not the joining state of the divided core is appropriate is determined based on a ratio between the voltage between the connection terminals and the voltage between the detection terminals. It is in the carrier injection device.
かかる第３の態様では、接続端子間の電圧と、前記検出端子間の電圧との比を、予め求めた基準値と比較することにより、適否を判断することができる。 In the third aspect, it is possible to determine suitability by comparing the ratio between the voltage between the connection terminals and the voltage between the detection terminals with a reference value obtained in advance.
本発明の第４の態様は、第１〜３の何れかの態様において、前記装置本体は、前記搬送用トランスを貫通する電路に設けられた零相変流器を接続するための少なくとも一対の接続端子と、この接続端子に接続された零相変流器を介してＩ０漏洩電流を検出する検出手段とを具備し、Ｉ０絶縁検出器として機能することを特徴とする搬送波注入装置にある。 According to a fourth aspect of the present invention, in any one of the first to third aspects, the apparatus main body includes at least a pair of zero-phase current transformers provided in an electric circuit that penetrates the transfer transformer. A carrier injection device comprising a connection terminal and detection means for detecting an I 0 leakage current via a zero-phase current transformer connected to the connection terminal and functioning as an I 0 insulation detector is there.
かかる第４の態様では、搬送注入装置は、Ｉ０漏洩電流検出装置として機能する。 In the fourth aspect, the carrier injection device functions as an I 0 leakage current detection device.
本発明の第５の態様は、第１〜３の何れかの態様において、前記装置本体は、監視電圧注入トランスを接続するための一対の電圧注入端子と、前記搬送用トランスを貫通する電路に設けられた零相変流器を接続するための少なくとも一対の接続端子と、この接続端子に接続された零相変流器を介して漏洩電流を検出する検出手段とを具備し、Ｉｇｒ絶縁検出器として機能することを特徴とする搬送波注入装置にある。 According to a fifth aspect of the present invention, in any one of the first to third aspects, the apparatus main body is provided with a pair of voltage injection terminals for connecting a monitoring voltage injection transformer and an electric circuit that penetrates the transfer transformer. Igr insulation detection comprising at least a pair of connection terminals for connecting a provided zero-phase current transformer and detection means for detecting a leakage current via the zero-phase current transformer connected to the connection terminal A carrier injection device characterized by functioning as a detector.
かかる第５の態様では、搬送注入装置は、Ｉｇｒ絶縁検出装置として機能する。 In the fifth aspect, the carrier injection device functions as an Igr insulation detection device.
本発明の第６の態様は、第１〜５の何れかの態様において、前記分割鉄心の相対向する接合面は研磨面であり且つ防錆油が塗布されていることを特徴とする搬送波注入装置にある。 A sixth aspect of the present invention is the carrier injection according to any one of the first to fifth aspects, wherein the opposed joint surfaces of the divided cores are polished surfaces and coated with rust preventive oil. In the device.
かかる第６の態様では、防錆油の種類によってはこれの塗布により、分割面の接合状態が向上する。 In the sixth aspect, depending on the type of the rust preventive oil, the application state of the rust preventive oil improves the joining state of the split surfaces.
本発明の第７の態様は、磁束を導磁する２分割型の分割鉄心と、２分割された分割鉄心の外周を囲むバンドと、このバンドにより接合状態で固定された分割鉄心に装着されるコイル部材とを有する分割鉄心型トランスにおいて、前記バンドは、前記コイル部材を装着する部位に設けられて当該コイル部材の前記分割鉄心の周方向への移動を規制する位置決め部材と、前記分割鉄心の接合部位のそれぞれに設けられて当該分割鉄心の周方向に直交する方向への位置ずれを規制する位置ずれ防止部材とを具備することを特徴とする分割鉄心型トランスにある。 A seventh aspect of the present invention is attached to a two-part divided core that conducts magnetic flux, a band that surrounds the outer periphery of the two divided cores, and a divided core that is fixed in a joined state by the band. In the split iron core type transformer having a coil member, the band is provided at a portion where the coil member is mounted, and a positioning member for restricting movement of the coil member in the circumferential direction of the split iron core; and The split core transformer includes a misalignment prevention member that is provided at each of the joint portions and restricts misalignment in a direction perpendicular to the circumferential direction of the split core.
かかる第７の態様では、分割型鉄心の接合状態が良好な状態で比較的簡便に組み立てることができ、且つコイル部材の位置ずれを防止することができる。 In the seventh aspect, it is possible to assemble relatively easily in a state where the split iron core is in a good joined state, and it is possible to prevent displacement of the coil member.
本発明の第８の態様は、第７の態様において、前記位置決め部材は、前記一対の位置ずれ防止部材から等距離の位置に設けられていることを特徴とする分割鉄心型トランスにある。 An eighth aspect of the present invention is the split core transformer according to the seventh aspect, wherein the positioning member is provided at a position equidistant from the pair of misalignment prevention members.
かかる第８の態様では、分割面に対してコイル部材を理想的な位置に設けることができる。 In the eighth aspect, the coil member can be provided at an ideal position with respect to the split surface.
本発明の第９の態様は、第７又は８の態様において、前記分割鉄心の相対向する接合面は研磨面であり且つ防錆油が塗布されていることを特徴とする分割鉄心型トランスにある。 According to a ninth aspect of the present invention, in the seventh or eighth aspect, the split iron core transformer is characterized in that the opposed joint surfaces of the split iron core are polished surfaces and coated with rust preventive oil. is there.
かかる第９の態様では、防錆油の種類によってはこれの塗布により、分割面の接合状態が向上する。 In the ninth aspect, depending on the type of the rust preventive oil, the application state of the rust preventive oil improves the joining state of the split surfaces.
本発明の第１０の態様は、磁束を導磁する分割型の分割鉄心と、この分割鉄心に装着されるコイル部材とを有する分割鉄心型トランスの異常検出方法において、前記分割鉄心型トランスに電圧を印加してその電圧を第１の電圧として測定する一方、前記分割鉄心型トランスに流れる励磁電流に比例した電流を電圧に変換して当該電圧を第２の電圧として測定し、前記第１の電圧を前記第２の電圧との電圧比から前記分割鉄心の接合状態の適否を判断することを特徴とする分割鉄心型トランスの異常検出方法にある。 According to a tenth aspect of the present invention, in the abnormality detection method for a split core transformer having a split core that splits the magnetic flux and a coil member attached to the split core, a voltage is applied to the split core transformer. And measuring the voltage as the first voltage, converting the current proportional to the excitation current flowing through the split core transformer into a voltage and measuring the voltage as the second voltage, In the method of detecting an abnormality of the split core transformer, the suitability of the joined state of the split core is determined from the voltage ratio with the second voltage.
かかる第１０の態様では、分割鉄心型トランスに印加される第１の電圧と、分割鉄心型トランスに流れる励磁電流に比例した電流を変換した第２の電圧との電圧比から前記分割鉄心の接合状態の適否を判断することができる。 In the tenth aspect, the split iron core is joined based on the voltage ratio between the first voltage applied to the split core transformer and the second voltage obtained by converting the current proportional to the excitation current flowing in the split core transformer. Appropriateness of the state can be determined.
本発明の第１１の態様は、第１０の態様において、前記接合状態の適否の判断基準として、許容限界の接合状態の電圧比を基準値として予め測定しておくことを特徴とする分割鉄心型トランスの異常検出方法にある。 An eleventh aspect of the present invention is the divided core type according to the tenth aspect, characterized in that, as a criterion for determining the suitability of the joint state, a voltage ratio of an allowable limit joint state is measured in advance as a reference value. There is a transformer abnormality detection method.
かかる第１１の態様では、許容限界の接合状態を電圧比の基準値として予め測定しておくことにより、接合状態の適否を判断する。 In the eleventh aspect, whether or not the joining state is appropriate is determined by measuring in advance the joining state at the allowable limit as the reference value of the voltage ratio.
本発明の搬送波注入装置、搬送用トランスに流れる励磁電流に比例した電流を電圧に変換する変換手段と、この変換手段で変換した電圧を測定して前記分割鉄心の接合の適否を検出するための検出端子とを設けたので、接続端子を介して搬送用トランスに印加される電圧を測定すると共に、検出端子を介して励磁電流に比例した電流を変換した電圧を測定し、両者の比により接合状態の適否を検出することができる。 The carrier injection device according to the present invention, a conversion means for converting a current proportional to the excitation current flowing through the transfer transformer into a voltage, and a voltage converted by the conversion means for measuring the suitability of the joining of the divided cores. Since the detection terminal is provided, the voltage applied to the transfer transformer via the connection terminal is measured, and the voltage obtained by converting the current proportional to the excitation current is measured via the detection terminal. Appropriateness of the state can be detected.
以下、本発明を一実施形態に基づいて説明する。 Hereinafter, the present invention will be described based on an embodiment.
図１には本発明の分割鉄心型トランスの全体斜視、図２及び図３にはその分解斜視、図４及び図５にはその平面、側面をそれぞれ示す。これらの図面に示すように、分割鉄心型トランス１０は、分割型鉄心２０とコイル部材３０とを具備する。分割型鉄心２０は、略楕円形状の磁性材料からなる鉄心を２分割した２つのカットコア２１及び２２からなり、カットコア２１及び２２は、分割面２１ａ及び２２ａ同士を相対向して接合させた状態で固定バンド４０により固定・保持されている。 FIG. 1 is an overall perspective view of a split iron core transformer according to the present invention, FIGS. 2 and 3 are exploded perspective views, and FIGS. 4 and 5 are plan and side views, respectively. As shown in these drawings, the split core transformer 10 includes a split core 20 and a coil member 30. The split-type iron core 20 includes two cut cores 21 and 22 obtained by dividing an iron core made of a substantially elliptical magnetic material into two, and the cut cores 21 and 22 are joined to each other with the split surfaces 21a and 22a facing each other. In the state, it is fixed and held by the fixing band 40.
固定バンド４０は、分割型鉄心２０の外周面を囲む帯状のバンド本体４１と、バンド本体４１の両端部を折り返して設けられた折り返し部４１ａに嵌合されたピン４２，４３と、一方のピン４２の折り返し部４１ａの切り欠き部４１ｂから露出した部分に形成された貫通孔４２ａを貫通し、他方のピン４３の切り欠き部４１ｂから露出した部分に形成された雌ねじ部４３ａに螺合するねじ４４とを具備し、ねじ４４を適度に雌ねじ部４３ａに螺合することにより、一対のカットコア２１及び２２を固定保持するものである。また、固定バンド４０のバンド本体４１のカットコア２１及び２２の分割面２１ａ、２２ａに対向する位置の外側にコア押さえ部材４５が、コイル部材３０を取り付ける位置の外側にはコイル押さえ部材４６が、それぞれ接合されている。ここで、コア押さえ部材４５は、バンド本体４１の幅方向両側で内側に屈曲した屈曲部４５ａを有し、両側の屈曲部４５ａにより、カットコア２１，２２の分割面２１ａ，２２ａ同士のずれを防止するものである。また、コイル押さえ部材４６は、バンド本体４１の長手方向両端に外側に突出した突出部４６ａを有し、突出部４６ａ間にコイル部材３０を位置決め保持するものである。 The fixed band 40 includes a band-shaped band main body 41 that surrounds the outer peripheral surface of the split core 20, pins 42 and 43 that are fitted to folded portions 41 a that are provided by folding both ends of the band main body 41, and one pin A screw that passes through a through hole 42a formed in a portion exposed from the cutout portion 41b of the folded portion 41a of 42 and is screwed into a female screw portion 43a formed in a portion exposed from the cutout portion 41b of the other pin 43. 44, and a pair of cut cores 21 and 22 are fixedly held by screwing the screw 44 into the female screw portion 43a appropriately. Further, the core pressing member 45 is outside the position facing the split surfaces 21a and 22a of the cut cores 21 and 22 of the band main body 41 of the fixed band 40, and the coil pressing member 46 is outside the position where the coil member 30 is attached. Each is joined. Here, the core pressing member 45 has bent portions 45a bent inward on both sides in the width direction of the band main body 41, and the bent portions 45a on both sides can shift the split surfaces 21a and 22a of the cut cores 21 and 22 from each other. It is to prevent. The coil pressing member 46 has protruding portions 46a protruding outward at both ends in the longitudinal direction of the band body 41, and positions and holds the coil member 30 between the protruding portions 46a.
コイル部材３０は、カットコア２１及びバンド本体４１がほぼ密着した状態で貫通する貫通孔３１ａを有するボビン３１と、ボビン３１に巻回されたコイル３２とを具備し、コイル３２の表面は収縮チューブ３３により覆われ、コイル３２の端部には接続端子３４が設けられたものである。 The coil member 30 includes a bobbin 31 having a through-hole 31a that penetrates the cut core 21 and the band main body 41 in close contact with each other, and a coil 32 wound around the bobbin 31, and the surface of the coil 32 is a contraction tube. The connection terminal 34 is provided at the end of the coil 32.
このような分割鉄心型トランス１０は、以下のようにして簡便に且つ接合状態良好に組み立てることができる。まず、バンド本体４１をコイル部材３０のボビン３１の貫通孔３１ａに貫通させ、コイル押さえ部材４６の突出部４６ａの間に保持し、この状態で貫通孔３１ａに一方のカットコア２１を挿入する。このときカットコア２１とバンド本体４１とは密着状態で貫通孔３１ａ内で保持され、コイル押さえ部材４６の突出部４６ａに保持されたコイル部材３０は位置決めされる。次いで、カットコア２１の分割面２１ａに他方のカットコア２２の分割面２２ａを相対向させ、カットコア２２の外周面に沿わせてバンド本体４１を配置し、一方の端部のピン４２に貫通させたねじ４４を他方のピン４３の雌ねじ部４３ａに螺合していく。また、このとき、分割面２１ａ，２２ａは、コア押さえ部材４５の略中央部に位置するように配置し、コア押さえ部材４５の屈曲部４５ａにより、分割面２１ａ，２２ａ近傍の端部の厚さ方向両端側が押さえられ、分割面２１ａ，２２ａ同士の接合ずれが防止される。そして、この状態でねじ４４をねじ込んでいってピン４２とピン４３とを近接させて、バンド本体４１によりカットコア２１，２２を締め上げ固定する。これにより、分割鉄心型トランス１０が比較的容易に、且つ良好な接合状態で組み立てられる。 Such a split core type transformer 10 can be easily assembled in a good joined state as follows. First, the band main body 41 is passed through the through hole 31a of the bobbin 31 of the coil member 30, and is held between the protruding portions 46a of the coil pressing member 46. In this state, one cut core 21 is inserted into the through hole 31a. At this time, the cut core 21 and the band main body 41 are held in close contact with each other in the through hole 31a, and the coil member 30 held by the protruding portion 46a of the coil pressing member 46 is positioned. Next, the split surface 21a of the other cut core 22 is opposed to the split surface 21a of the cut core 21, the band body 41 is disposed along the outer peripheral surface of the cut core 22, and penetrates the pin 42 at one end. The screw 44 is screwed into the female screw portion 43 a of the other pin 43. At this time, the split surfaces 21 a and 22 a are arranged so as to be positioned at substantially the center portion of the core pressing member 45, and the thicknesses of the end portions in the vicinity of the split surfaces 21 a and 22 a are formed by the bent portions 45 a of the core pressing member 45. Both ends in the direction are pressed, and the joining deviation between the split surfaces 21a and 22a is prevented. In this state, the screw 44 is screwed to bring the pin 42 and the pin 43 close to each other, and the cut cores 21 and 22 are tightened and fixed by the band main body 41. As a result, the split core transformer 10 can be assembled relatively easily and in a good bonded state.
ここで、カットコア２１及び２２の分割面２１ａ，２２ａは、メッキや塗装をすることなく、研磨面のままとし、防錆油を塗布した状態とするのが好ましい。防錆のためには、メッキや塗装が行なわれることもあるが、この際に励磁電流の増加があり、性能が実使用上問題になるレベルに劣化することを、発明者らは実験により知見した。 Here, it is preferable that the split surfaces 21a and 22a of the cut cores 21 and 22 remain as polished surfaces without being plated or painted, and in a state where rust preventive oil is applied. In order to prevent rusting, plating and painting may be performed, but at this time, the excitation current increases, and the inventors have found through experiments that the performance deteriorates to a level that causes problems in practical use. did.
上述したように分割鉄心型トランス１０は、比較的容易に、且つ良好な接合状態で組み立てられるが、接合が微妙にずれたり、ゴミなどがはさまったりすることもあり、組み立て後には接合状態を検査するのが好ましい。次に、このような分割鉄心型トランス１０の分割面２１ａ，２２ａの接合状態を特別な装置を用いることなく、比較的簡便に検査できる異常検出方法及びこのような異常検査システムを有する搬送波注入装置について説明する。 As described above, the split core transformer 10 can be assembled relatively easily and in a good joined state. However, the joining may be slightly shifted or dust may be trapped. It is preferable to inspect. Next, an abnormality detection method and a carrier injection device having such an abnormality inspection system that can relatively easily inspect the joining state of the divided surfaces 21a and 22a of the divided core transformer 10 without using a special device. Will be described.
図６に示すように、搬送波注入装置１００は、上述した分割鉄心型トランス１０と、検査装置本体６０とを具備し、検査装置本体６０には、分割鉄心型トランス１０を接続するための一対の接続端子６１ａ，６１ｂを具備する。また、検査装置本体６０にはＣＰＵを内蔵する制御部６２を具備する。分割鉄心型トランス１０へ注入される搬送波は、制御部６２で形成され、制御部６２の搬送波出力端子６２ａは、バンドパスフィルタ６３を介して接続された増幅手段６４で増幅されて接続端子６１ａに送出されるようになっている。すなわち、制御部６２，バンドパスフィルタ６３及び増幅手段６４は搬送波注入手段として機能する。一方、接続端子６１ａを介して分割鉄心型トランス１０へ流入する励磁電流は、増幅手段６４を介してバンドパスフィルタ６５に出力されるようになっており、変換手段としてのバンドパスフィルタ６５で電圧に変換されて検出端子６６ａ，６６ｂにより電圧として検出できるようになっている。さらに、検出装置本体６０には、検出用零相変流器７１，７２をそれぞれ接続するための二組の接続端子６７及び６８を具備し、接続端子６７及び６８のそれぞれは、Ｉ０検出用のアナログフィルタ６９を介して、制御部６２のアナログ・デジタル変換端子６２ｂ，６２ｃに接続されている。また、検出器本体６０には、搬送波を断続波出力にするモードと、連続波出力とするモードとの切り替えをするためのモード切替スイッチ７０を有する。さらに、このような搬送波注入装置１００は、分割鉄心型トランス１０へ搬送波を注入するだけでなく、検出用零相変流器７１，７２を接続することにより、Ｉ０絶縁検出器として機能するものである。 As shown in FIG. 6, the carrier injection device 100 includes the above-described split iron core transformer 10 and the inspection device main body 60, and a pair of inspection cores 60 for connecting the split iron core transformer 10 to the inspection device main body 60. Connection terminals 61a and 61b are provided. Further, the inspection apparatus main body 60 includes a control unit 62 incorporating a CPU. The carrier wave injected into the split core transformer 10 is formed by the control unit 62, and the carrier wave output terminal 62a of the control unit 62 is amplified by the amplifying means 64 connected through the band pass filter 63 and is connected to the connection terminal 61a. It is to be sent out. That is, the control unit 62, the band pass filter 63, and the amplification unit 64 function as a carrier injection unit. On the other hand, the exciting current flowing into the split core transformer 10 via the connection terminal 61a is output to the band pass filter 65 via the amplifying means 64, and the voltage is applied to the band pass filter 65 as the converting means. And can be detected as a voltage by the detection terminals 66a and 66b. Further, the detection device main body 60 includes two sets of connection terminals 67 and 68 for connecting the detection zero-phase current transformers 71 and 72, respectively. The connection terminals 67 and 68 are for detecting I0 . The analog filter 69 is connected to the analog / digital conversion terminals 62b and 62c of the control unit 62. In addition, the detector main body 60 includes a mode changeover switch 70 for switching between a mode in which a carrier wave is output as an intermittent wave and a mode in which a carrier wave is output. Further, such a carrier injection device 100 not only injects a carrier wave into the split core transformer 10, but also functions as an I 0 insulation detector by connecting the detection zero-phase current transformers 71 and 72. It is.
以下、このような搬送波注入装置１００において、分割鉄心型トランス１０の接合状態の適否を検出する方法について説明する。ここで、分割鉄心型トランス１０は、変圧器８１に接続される接地線８２をカットコア２１及び２２で挟み込むようにして、上述したように組み立てたものとする。また、接地線８２には、検出用零相変流器７１，７２が取り付けられているものとする。 Hereinafter, a method for detecting the suitability of the joined state of the split core transformer 10 in such a carrier injection device 100 will be described. Here, it is assumed that the split core transformer 10 is assembled as described above so that the ground wire 82 connected to the transformer 81 is sandwiched between the cut cores 21 and 22. Further, it is assumed that detection zero-phase current transformers 71 and 72 are attached to the ground wire 82.
まず、簡便な接合状態のチェック方法を説明する。検査に先駆けて、モード切替スイッチ７０を連続波出力とし、制御部６２、バンドパスフィルタ６３及び増幅手段６４からなる搬送波注入手段により連続波の搬送波を分割鉄心型トランス１０へ注入する。このとき、分割鉄心型トランス１０には約４Ｖ、１４７２Ｈｚの電圧が印加されるように設定されているが、約±３０％の範囲での変動が許容されている。そこで、まず、接続端子６１ａ，６１ｂ間の電圧を測定し、これをＸ（Ｖ）とする。次に、検出端子６６ａ，６６ｂ間の電圧を測定し、これをＹ（Ｖ）とする。この電圧は、分割鉄心型トランス１０の励磁電流に比例する電流がバンドパスフィルタ６５により電圧に変換された値である。そして、Ｘ／Ｙを算出し、この値が基準値Ｚ以上であれば、接合状態に問題はないと判断する。 First, a simple method for checking the joining state will be described. Prior to the inspection, the mode changeover switch 70 is set as a continuous wave output, and a continuous wave carrier is injected into the split core transformer 10 by the carrier injection means including the control unit 62, the band pass filter 63 and the amplification means 64. At this time, the divided core transformer 10 is set so that a voltage of about 4 V and 1472 Hz is applied, but variation within a range of about ± 30% is allowed. Therefore, first, the voltage between the connection terminals 61a and 61b is measured, and this is defined as X (V). Next, the voltage between the detection terminals 66a and 66b is measured, and this is defined as Y (V). This voltage is a value obtained by converting a current proportional to the exciting current of the split core transformer 10 into a voltage by the band-pass filter 65. Then, X / Y is calculated, and if this value is equal to or greater than the reference value Z, it is determined that there is no problem in the bonding state.
ここで、電圧Ｘ及びＹの検出は、一般的なテスターで行うことができるが、この場合には、１４７２Ｈｚを、例えば、誤差２％より良い精度で計測できるデジタルメータを用いることができ、電圧Ｘ及びＹを同一の計測器で計測するのが好ましい。 Here, the voltages X and Y can be detected by a general tester. In this case, however, a digital meter capable of measuring 1472 Hz with an accuracy better than 2% error can be used. It is preferable to measure X and Y with the same measuring instrument.
ここで、基準値Ｚは、許容限界の接合状態をシミュレーションして予め測定しておく必要がある。許容限界の状態は、使用条件等によっても異なるが、例えば、分割鉄心型トランス１０に検査用電路を挿通させて当該検査用電路に流れる搬送波の波形をモニターし、接合状態を変化させる。例えば、ねじ４４の締め付け方を変化させたり、故意に分割面間に樹脂フィルムを挟持したりする。そして、例えば、搬送波が歪みはじめた際のＸ及びＹを検出し、このときのＸ／Ｙを基準値Ｚとし、これ以上だった場合を接合状態良好とする。なお、基準値Ｚ＝Ｘ／Ｙの代わりにＹ／Ｘを使用してもよいことはいうまでもない。 Here, the reference value Z needs to be measured in advance by simulating the allowable joining state. Although the allowable limit state varies depending on the use conditions and the like, for example, an inspection electric circuit is inserted into the split core transformer 10 and the waveform of a carrier wave flowing through the inspection electric circuit is monitored to change the joining state. For example, the fastening method of the screw 44 is changed, or a resin film is intentionally sandwiched between the divided surfaces. Then, for example, X and Y when the carrier wave starts to be distorted are detected, and X / Y at this time is set as a reference value Z. Needless to say, Y / X may be used instead of the reference value Z = X / Y.
なお、接合状態が基準値Ｚより小さかった場合には、分割面同士の接合状態の微調整を行えばよい。また、基準値Ｚよりかなり小さい場合には、分割面間にゴミ等が挟まっている可能性があるので、分解して分割面の清掃を行ない、防錆油を再塗布したりすればよい。 When the joining state is smaller than the reference value Z, fine adjustment of the joining state between the divided surfaces may be performed. Further, if it is much smaller than the reference value Z, dust or the like may be sandwiched between the divided surfaces. Therefore, the divided surfaces may be disassembled to clean the divided surfaces and re-apply rust preventive oil.
このような簡便なチェック方法によって基準値に近いが若干小さいなど、適否の判断が微妙な場合には、分割鉄心型トランス１０へ印加されている電圧と、励磁電流自体を測定し、電流基準値以下であるか否かで判断するようにしてもよいが、この場合には、電流値を高精度に測定するための比較的高価な電流計が必要となる。 When the judgment of suitability is delicate, such as near the reference value by this simple check method but slightly smaller, the voltage applied to the split core transformer 10 and the excitation current itself are measured, and the current reference value The determination may be made based on whether or not the current value is below. However, in this case, a relatively expensive ammeter for measuring the current value with high accuracy is required.
何れにしても、分割鉄心型トランス１０の接合状態が良好であることが確認された後、このようなモード切替スイッチ７０を切り替えて正規の通報用出力形態である断続波とし、分割鉄心型トランス１０へ注入する。 In any case, after confirming that the joined state of the split core transformer 10 is good, such a mode changeover switch 70 is switched to an intermittent wave which is a normal notification output form, and the split core transformer Inject into 10.
また、搬送波注入装置１００は、分割鉄心型トランス１０へ搬送波を注入するだけでなく、接続端子６７，６８に接続された検出用零相変流器７１，７２によりＩ０漏洩電流を測定するＩ０絶縁検出器として使用することができる。 The carrier injection device 100 not only injects a carrier wave into the split core transformer 10, but also measures the I 0 leakage current by the detection zero-phase current transformers 71 and 72 connected to the connection terminals 67 and 68. It can be used as a zero insulation detector.
（試験例）
上述した分割鉄心型トランス１０について基準値Ｚを決定するために、許容限界の接合状態をシミュレーションして予め測定する方法の一例を以下に説明する。
(Test example)
In order to determine the reference value Z for the above-described split core transformer 10, an example of a method for measuring in advance by simulating the allowable joining state will be described below.
分割鉄心型トランス１０を以下の状態で組み立てて検査用電路を挿通させて当該検査用電路に流れる搬送波の波形をモニターする一方、Ｘ（Ｖ）及びＹ（Ｖ）を測定した。また、接続端子６１ａに流入する励磁電流も測定した。
（１）通常状態で組み立てたもの。
（２）ねじ４４を緩めに締め付けたもの。
（３）分割面２１ａ，２２ａ間に、厚さ２５μｍの樹脂フィルムを挟んだ状態で組み立てたもの。
（４）分割面２１ａ，２２ａ間に、厚さ５０μｍの樹脂フィルムを挟んだ状態で組み立てたもの。
The divided iron core type transformer 10 was assembled in the following state, the inspection electric circuit was inserted, and the waveform of the carrier wave flowing through the inspection electric circuit was monitored, while X (V) and Y (V) were measured. Further, the excitation current flowing into the connection terminal 61a was also measured.
(1) One assembled in a normal state.
(2) Loosely tightened screws 44.
(3) Assembling with a resin film having a thickness of 25 μm sandwiched between the split surfaces 21a and 22a.
(4) Assembling with a resin film having a thickness of 50 μm sandwiched between the split surfaces 21a and 22a.
この結果を表１に示す。（１）、（２）の状態では搬送波は歪みがないが、（３）の状態では歪み始めた状態が観察され、（４）では歪んでいた。また、励磁電流は（１）から（４）まで徐々に大きくなった。 The results are shown in Table 1. In the states of (1) and (2), the carrier wave is not distorted, but in the state of (3), a state of starting to be distorted is observed, and in (4), it is distorted. Further, the excitation current gradually increased from (1) to (4).
よって、この場合、（３）の状態を許容限界とし、このときのＸ／Ｙ＝３．８１を基準値とした。 Therefore, in this case, the state (3) was set as the allowable limit, and X / Y = 3.81 at this time was set as the reference value.
本発明の分割鉄心型トランス及びその異常検出方法は、搬送波注入装置だけでなく、各種変流器など、分割鉄心を有するものに適用可能である。 The divided core type transformer and the abnormality detection method thereof according to the present invention can be applied not only to the carrier injection device but also to those having a divided core such as various current transformers.
１０ 分割鉄心型トランス
２０ 分割型鉄心
２１，２２ カットコア
３０ コイル部材
４０ 固定バンド
１００ 搬送波注入装置
DESCRIPTION OF SYMBOLS 10 Divided core type transformer 20 Divided type core 21 and 22 Cut core 30 Coil member 40 Fixed band 100 Carrier injection device
Claims (11)
Priority Applications (1)
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| JP2010013545A JP4930955B2 (en) | 2010-01-25 | 2010-01-25 | Split core transformer |
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| JP2010013545A JP4930955B2 (en) | 2010-01-25 | 2010-01-25 | Split core transformer |
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| JP2003366448A Division JP4482309B2 (en) | 2003-10-27 | 2003-10-27 | Carrier wave injection device and anomaly detection method for split core transformer |
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| JP4930955B2 JP4930955B2 (en) | 2012-05-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718954A (en) * | 2023-05-30 | 2023-09-08 | 安徽大学 | Traction transformer iron core loosening and shifting simulation device and diagnosis method thereof |
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| JPH0383917A (en) * | 1989-08-29 | 1991-04-09 | Biomaterial Universe Kk | Enteric preparation and its preparation |
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| JPH0383917A (en) * | 1989-08-29 | 1991-04-09 | Biomaterial Universe Kk | Enteric preparation and its preparation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718954A (en) * | 2023-05-30 | 2023-09-08 | 安徽大学 | Traction transformer iron core loosening and shifting simulation device and diagnosis method thereof |
| CN116718954B (en) * | 2023-05-30 | 2024-05-10 | 安徽大学 | Traction transformer iron core loosening and shifting simulation device and diagnosis method thereof |
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| JP4930955B2 (en) | 2012-05-16 |
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