JPH11121259A - Current transformer and unit thereof - Google Patents
Current transformer and unit thereofInfo
- Publication number
- JPH11121259A JPH11121259A JP9297769A JP29776997A JPH11121259A JP H11121259 A JPH11121259 A JP H11121259A JP 9297769 A JP9297769 A JP 9297769A JP 29776997 A JP29776997 A JP 29776997A JP H11121259 A JPH11121259 A JP H11121259A
- Authority
- JP
- Japan
- Prior art keywords
- current transformer
- terminal
- winding
- coil
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Coils Of Transformers For General Uses (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、変流器に関し、特
に漏電検知器に用いて好適な基板実装型零相変流器(変
流器)用ユニット及び変流器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current transformer, and more particularly to a unit for a board-mounted zero-phase current transformer (current transformer) and a current transformer suitable for use as a leakage detector.
【0002】[0002]
【従来の技術】図3に、従来の変流器用ユニットを示
す。図3(a)は変流器用ユニットの外観斜視図、図3
(b)は変流器用ユニットの断面図(樹脂注入前)であ
る。2. Description of the Related Art FIG. 3 shows a conventional current transformer unit. FIG. 3A is an external perspective view of a current transformer unit, and FIG.
(B) is sectional drawing (before resin injection | pouring) of the unit for current transformers.
【0003】図3に示すように、従来の変流器用ユニッ
トでは、高い初透磁率を持つトロイダルコアの全周に均
一に巻線を巻回してなるトロイダルコイル3を、ピン端
子32を有するケース31に収納し、巻線端末部をピン
端子32の一端[図3(b)中2点鎖線部]に接続し
(からげ半田)、ピン端子32を矢印20の方向に折り
曲げて[図3(b)中実線部]逆L字状にしてから、ケ
ース31にモールド樹脂を充填していた[図3
(a)]。そして、変流器用ユニットのピン端子32を
実装基板に差込み、ケース31の穴13に一次コイルと
してケーブルを貫通させて変流器は完成する。As shown in FIG. 3, in a conventional current transformer unit, a toroidal coil 3 formed by uniformly winding a winding around the entire circumference of a toroidal core having a high initial permeability is provided with a case having pin terminals 32. 31, the winding terminal portion is connected to one end of the pin terminal 32 [two-dot chain line portion in FIG. 3 (b)] (bent solder), and the pin terminal 32 is bent in the direction of arrow 20 [FIG. (B) Solid line portion] The case 31 was filled with mold resin after being formed into an inverted L shape [FIG.
(A)]. Then, the pin terminal 32 of the current transformer unit is inserted into the mounting board, and a cable is passed through the hole 13 of the case 31 as a primary coil to complete the current transformer.
【0004】[0004]
【発明が解決しようとする課題】変流器のピン端子に
は、単線の銅線を使用するため、巻線端末部に比べてピ
ン端子の熱容量は大きい。そのために、ピン端子と巻線
端末部との接合部は加熱されにくく、細い巻線材の巻線
端末部を半田で接続させるには、半田付け性に問題があ
った。Since a single copper wire is used for the pin terminal of the current transformer, the heat capacity of the pin terminal is larger than that of the winding terminal. Therefore, the joint between the pin terminal and the winding end is hardly heated, and there is a problem in solderability in connecting the winding end of a thin winding material with solder.
【0005】また、半田を施したピン端子を折り曲げる
ため、巻線端末部の線材が伸びて細くなり、また、モー
ルド樹脂硬化時の収縮による応力が巻線端末部の線材に
かかるため、巻線端末部は断線し易い。そのため、巻線
端末部とピン端子の接触不良や、巻線端末部に断線不良
などの不具合が発生することがある。これらの不具合箇
所の特定は、疑似接触不良などがあることと、接続箇所
がモールド樹脂により覆われているため、困難であっ
た。また、変流器用ユニットの信頼性と良品率の向上に
も課題を残していた。Further, since the soldered pin terminal is bent, the wire at the end of the winding is elongated and thinned, and the stress due to shrinkage during curing of the mold resin is applied to the wire at the end of the winding. The terminal is easily disconnected. For this reason, a defect such as a contact failure between the winding terminal and the pin terminal or a disconnection failure at the winding terminal may occur. It has been difficult to identify these defective portions because there is a false contact failure and the connection portions are covered with the mold resin. In addition, there remains a problem in improving the reliability and non-defective rate of the current transformer unit.
【0006】そこで、本発明の課題は、信頼性と良品率
が高い変流器を提供することである。Accordingly, an object of the present invention is to provide a current transformer having high reliability and a high yield rate.
【0007】[0007]
【課題を解決するための手段】本発明は、トロイダルコ
アに巻線を施したトロイダルコイルと、絶縁材料よりな
り前記トロイダルコイルを収納するドーナッツ状のコイ
ル収納部と複数のピン端子と前記ピン端子を固定する端
子固定部とを有するケースとからなり、前記ピン端子の
両端を前記端子固定部の両端面から突き出して突出部と
し、前記トロイダルコイルの巻線端末部を前記突出部の
一方に接続してなる変流器用ユニット及びそれを用いた
変流器である。SUMMARY OF THE INVENTION The present invention is directed to a toroidal coil having a toroidal core wound thereon, a donut-shaped coil housing made of an insulating material for housing the toroidal coil, a plurality of pin terminals, and the pin terminal. And a case having a terminal fixing portion for fixing the pin terminal, wherein both ends of the pin terminal protrude from both end surfaces of the terminal fixing portion to form protruding portions, and a winding terminal portion of the toroidal coil is connected to one of the protruding portions. And a current transformer using the same.
【0008】本発明は、前記課題を解決するために、巻
線端末部をピン端子に接続し、ピン端子を折り曲げず
に、ケースにモールド樹脂を注入して変流器用ユニット
として完成させるものである。すなわち、ピン端子と巻
線端末部との接合部はモールド樹脂から露出した形で変
流器用ユニットを完成させる。According to the present invention, in order to solve the above-mentioned problems, a winding terminal is connected to a pin terminal, and without bending the pin terminal, a molding resin is injected into a case to complete a current transformer unit. is there. That is, the junction for the pin terminal and the winding end is exposed from the mold resin to complete the current transformer unit.
【0009】従来の変流器用ユニットでは、ピン端子と
巻線端末部との接合部は、モールド樹脂内に収まってい
るが、本発明では、モールド樹脂から露出させることに
より、前記接合部は目視確認ができるため、断線不良や
接触不良を容易に発見し、修復することができる。ま
た、ピン端子を折り曲げる必要がないため、断線不良を
減らすことができるので、信頼性と良品率が向上する。In the conventional current transformer unit, the joint between the pin terminal and the winding terminal is accommodated in the mold resin. In the present invention, the joint is visually inspected by exposing it from the mold resin. Since confirmation is possible, disconnection failure and contact failure can be easily found and repaired. Further, since there is no need to bend the pin terminals, disconnection defects can be reduced, so that the reliability and the yield rate can be improved.
【0010】[0010]
【発明の実施の形態】図1に、本発明の変流器用ユニッ
トの外観斜視図(モールド樹脂注入前)を示す。また、
図2に、本発明の変流器用ユニットに用いるケースを示
す。図2(a)はケースの外観斜視図で、図2(b)は
ケースの側面図である。FIG. 1 is a perspective view showing the appearance of a current transformer unit according to the present invention (before molding resin is injected). Also,
FIG. 2 shows a case used for the current transformer unit of the present invention. FIG. 2A is an external perspective view of the case, and FIG. 2B is a side view of the case.
【0011】パーマロイCよりなる薄板を打ち抜いた板
を積層してトロイダルコアとし、トロイダルコアにマグ
ネットワイヤを巻線してトロイダルコイル3(図1)を
得る。[0011] Toroidal cores are formed by laminating thin sheets made of permalloy C, and a magnet wire is wound around the toroidal core to obtain a toroidal coil 3 (Fig. 1).
【0012】また、図2に示すように、トロイダルコイ
ル2を収納するドーナッツ状のコイル収納部12と複数
のピン端子2とピン端子2を固定する端子固定部11と
を有するケース1を、絶縁材料を射出成形して得る。ピ
ン端子2の両端は、端子固定部11の両端面から突き出
して突出部21,22となっている。As shown in FIG. 2, the case 1 having a donut-shaped coil housing portion 12 for housing the toroidal coil 2, a plurality of pin terminals 2, and a terminal fixing portion 11 for fixing the pin terminals 2 is insulated. The material is obtained by injection molding. Both ends of the pin terminal 2 protrude from both end surfaces of the terminal fixing portion 11 to form protrusions 21 and 22.
【0013】そして、本発明の変流器用ユニットを、図
1に示すように、トロイダルコイル3をケ−ス1のコイ
ル収納部(図示せず)に収納し、トロイダルコイル3の
巻線端末部を一方の突出部22に接続し、さらにモール
ド樹脂をコイル収納部に注入して得た。As shown in FIG. 1, the current transformer unit of the present invention houses the toroidal coil 3 in a coil housing (not shown) of the case 1 and a winding terminal of the toroidal coil 3. Was connected to one of the protruding portions 22, and the molding resin was further injected into the coil accommodating portion.
【0014】本発明の変流器用ユニットの突出部21を
実装基板に挿入し、ドーナッツ状のコイル収納部の穴1
3に一次コイルとなるケーブルを貫通させて、変流器は
完成する。The projecting portion 21 of the current transformer unit of the present invention is inserted into the mounting board, and the hole 1 of the donut-shaped coil housing portion is inserted.
The current transformer is completed by passing the cable serving as the primary coil through 3.
【0015】[0015]
【実施例】外径13.6mm、内径10.6mm、厚さ
0.35mmのドーナッツ状のパーマロイCよりなる板
を5枚積層してトロイダルコアとし、トロイダルコアの
外周に電気絶縁を施してから、呼び径0.1mmのマグ
ネットワイヤを500ターン巻回して、トロイダルコイ
ルを得た。また、外径0.8mmの硬銅線を長さ14m
mに切断してピン端子とし、ピン端子を端子固定部から
3mm突き出すようにして突出部22(図2)とし(突
出部21の長さ4mm)、コイル収納部の内径を8.5
mmとするケース1を得た。そして、トロイダルコイル
3をケース1に収納し、コイルの端末部をピン端子に接
続し、コイル収納部にモールド樹脂を注入し硬化させ
て、本発明の変流器用ユニットを得た。EXAMPLE A toroidal core was formed by laminating five donut-shaped permalloy C plates having an outer diameter of 13.6 mm, an inner diameter of 10.6 mm, and a thickness of 0.35 mm. A magnet wire having a nominal diameter of 0.1 mm was wound 500 turns to obtain a toroidal coil. Also, a hard copper wire with an outer diameter of 0.8 mm is 14 m long.
m, so as to protrude 3 mm from the terminal fixing portion to form a protruding portion 22 (FIG. 2) (length of the protruding portion 21 is 4 mm), and the inner diameter of the coil housing portion is 8.5.
mm was obtained. Then, the toroidal coil 3 was housed in the case 1, the terminal of the coil was connected to the pin terminal, and a mold resin was injected into the coil housing and cured to obtain a current transformer unit of the present invention.
【0016】本実施例の変流器用ユニットを用いた変流
器には、断線不良や接触不良の発生はなかった。In the current transformer using the current transformer unit of the present embodiment, no disconnection failure or contact failure occurred.
【0017】[0017]
【発明の効果】本発明によれば、信頼性と良品率が高い
変流器が得られる。According to the present invention, a current transformer having high reliability and a high yield rate can be obtained.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の変流器用ユニットの外観斜視図(モー
ルド樹脂注入前)。FIG. 1 is an external perspective view of a current transformer unit of the present invention (before mold resin injection).
【図2】本発明の変流器用ユニットに用いるケースの説
明図。図2(a)はケースの外観斜視図、図2(b)は
ケースの側面図。FIG. 2 is an explanatory view of a case used for a current transformer unit of the present invention. FIG. 2A is an external perspective view of a case, and FIG. 2B is a side view of the case.
【図3】従来の変流器用ユニットの説明図。図3(a)
は変流器用ユニットの外観斜視図、図3(b)は変流器
用ユニットの断面図(樹脂注入前)。FIG. 3 is an explanatory view of a conventional current transformer unit. FIG. 3 (a)
FIG. 3 is an external perspective view of the current transformer unit, and FIG. 3B is a cross-sectional view of the current transformer unit (before resin injection).
1 (本発明の)ケース 11 (本発明の)端子固定部 12 (本発明の)コイル収納部 13 (コイル収納部の)穴 2 (本発明の)ピン端子 21、22 (本発明のピン端子の)突出部 3 トロイダルコイル 31 (従来の)ケース 32 (従来の)ピン端子 20 矢印 DESCRIPTION OF SYMBOLS 1 (Case of the present invention) 11 Terminal fixing part (of the present invention) 12 Coil accommodating part (of the present invention) 13 Hole (of the coil accommodating part) 2 Pin terminal (of the present invention) 21, 22 (pin terminal of the present invention) ) Projection 3 Toroidal coil 31 (Conventional) case 32 (Conventional) pin terminal 20 Arrow
Claims (2)
ルコイルと、絶縁材料よりなり前記トロイダルコイルを
収納するドーナッツ状のコイル収納部と複数のピン端子
と前記ピン端子を固定する端子固定部とを有するケース
とからなり、前記ピン端子の両端を前記端子固定部の両
端面から突き出して突出部とし、前記トロイダルコイル
の巻線端末部を前記突出部の一方に接続してなることを
特徴とする変流器用ユニット。1. A toroidal coil in which a winding is applied to a toroidal core, a donut-shaped coil storage portion made of an insulating material and storing the toroidal coil, a plurality of pin terminals, and a terminal fixing portion fixing the pin terminals. Wherein the two ends of the pin terminal protrude from both end surfaces of the terminal fixing portion to form a projecting portion, and a winding terminal portion of the toroidal coil is connected to one of the projecting portions. Current transformer unit.
ることを特徴とする変流器。2. A current transformer using the current transformer unit according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9297769A JPH11121259A (en) | 1997-10-14 | 1997-10-14 | Current transformer and unit thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9297769A JPH11121259A (en) | 1997-10-14 | 1997-10-14 | Current transformer and unit thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11121259A true JPH11121259A (en) | 1999-04-30 |
Family
ID=17850947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9297769A Withdrawn JPH11121259A (en) | 1997-10-14 | 1997-10-14 | Current transformer and unit thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11121259A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006344620A (en) * | 2005-06-07 | 2006-12-21 | Meidensha Corp | Current transformer |
JP2009025115A (en) * | 2007-07-19 | 2009-02-05 | Nec Tokin Corp | Current sensor |
KR101043173B1 (en) * | 2010-11-08 | 2011-06-20 | 임장수 | Zero phase current transformer and method of manufacturing the same |
CN102854359A (en) * | 2011-06-29 | 2013-01-02 | 松下神视龙野株式会社 | Current sensor |
-
1997
- 1997-10-14 JP JP9297769A patent/JPH11121259A/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006344620A (en) * | 2005-06-07 | 2006-12-21 | Meidensha Corp | Current transformer |
JP4507988B2 (en) * | 2005-06-07 | 2010-07-21 | 株式会社明電舎 | Current transformer |
JP2009025115A (en) * | 2007-07-19 | 2009-02-05 | Nec Tokin Corp | Current sensor |
KR101043173B1 (en) * | 2010-11-08 | 2011-06-20 | 임장수 | Zero phase current transformer and method of manufacturing the same |
CN102854359A (en) * | 2011-06-29 | 2013-01-02 | 松下神视龙野株式会社 | Current sensor |
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