JP2002319501A - Shunt resistor and method for adjusting its resistance - Google Patents
Shunt resistor and method for adjusting its resistanceInfo
- Publication number
- JP2002319501A JP2002319501A JP2002006391A JP2002006391A JP2002319501A JP 2002319501 A JP2002319501 A JP 2002319501A JP 2002006391 A JP2002006391 A JP 2002006391A JP 2002006391 A JP2002006391 A JP 2002006391A JP 2002319501 A JP2002319501 A JP 2002319501A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- fixed terminal
- terminal
- shunt
- terminal plate
- 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.)
- Granted
Links
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、シャント抵抗並び
にその抵抗値の調整方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shunt resistor and a method for adjusting the resistance value.
【0002】[0002]
【従来の技術】一般にパルス電流や交流大電流等の測定
においては、抵抗値が既知のシャント抵抗に被測定電流
を流し、このシャント抵抗に生じる電圧降下を測定する
ことが行われている。この種のシャント抵抗として、本
出願人は図11に示すようなものを既に提案している
(特開2000−131349号公報参照)。この公報
に記載されている従来のシャント抵抗は、略平板状の2
枚の抵抗体6a,6bをそれぞれの一端縁で接合するこ
とで略U字形とし、各抵抗体6a,6bの他端縁に略L
字形の固定端子板2a,2bの一端部を接合するととも
に、固定端子板2a,2bを通して被測定電流を流した
際にこれらの抵抗体6a,6bで生じる電圧降下を電圧
信号として取り出すための一対のリード線40,40が
各抵抗体6a,6bの固定端子板2a,2bとの接合部
位近傍にスポット溶接等によって接続された構造を有し
ている。2. Description of the Related Art Generally, in measuring a pulse current or a large alternating current, a current to be measured is passed through a shunt resistor having a known resistance value, and a voltage drop generated in the shunt resistor is measured. The present applicant has already proposed a shunt resistor of this type as shown in FIG. 11 (see Japanese Patent Application Laid-Open No. 2000-131349). The conventional shunt resistor described in this publication has a substantially flat plate shape.
The resistors 6a, 6b are joined at one end to form a substantially U-shape, and the other end of each resistor 6a, 6b is substantially L-shaped.
A pair of terminals for joining one end portions of the fixed terminal plates 2a and 2b in the shape of a letter and extracting voltage drops generated in these resistors 6a and 6b when a current to be measured flows through the fixed terminal plates 2a and 2b as a voltage signal. Are connected by spot welding or the like in the vicinity of the joints between the resistors 6a, 6b and the fixed terminal plates 2a, 2b.
【0003】[0003]
【発明が解決しようとする課題】ところが上記従来例に
おいては、リード線40,40を各抵抗体6a,6bの
表面に接続しているために、固定端子板2a,2bに臨
む抵抗体6a,6bの側面方向にリード線40,40が
引き出されており、抵抗体6a,6bの側面方向を開放
しておかなければならないという構造上の制約が生じて
設計の自由度が低下してしまうという問題があった。例
えば、固定端子板2a,2bに放熱板を設ける場合、抵
抗体6a,6bの側面方向に引き出されたリード線4
0,40が邪魔になり、リード線40,40を逃げるた
めに放熱板の形状が複雑になったり、全体が大型化する
といった問題が生じる。However, in the above-mentioned conventional example, since the lead wires 40, 40 are connected to the surfaces of the resistors 6a, 6b, the resistors 6a, 6b facing the fixed terminal plates 2a, 2b are connected. The lead wires 40, 40 are drawn out in the side direction of 6b, and there is a structural restriction that the side directions of the resistors 6a, 6b must be left open, thereby reducing the degree of freedom in design. There was a problem. For example, when a heat sink is provided on the fixed terminal plates 2a, 2b, the lead wires 4 drawn out in the lateral direction of the resistors 6a, 6b are used.
0 and 40 are in the way, and there is a problem that the shape of the heat radiating plate becomes complicated to escape the lead wires 40 and 40 and the whole becomes large.
【0004】本発明は上記問題に鑑みて為されたもので
あり、その目的とするところは、構造上の制約を無くし
て設計の自由度を向上することができるシャント抵抗を
提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to provide a shunt resistor capable of improving the degree of freedom in design by eliminating structural restrictions. .
【0005】さらに、請求項10の発明は、抵抗体の抵
抗値を簡単に調整することができるシャント抵抗の抵抗
値の調整方法を提供することを目的とする。A further object of the present invention is to provide a method of adjusting the resistance value of a shunt resistor, which can easily adjust the resistance value of a resistor.
【0006】[0006]
【課題を解決するための手段】請求項1の発明は、上記
目的を達成するために、所定の抵抗値を有する略平板状
の抵抗体と、この抵抗体の一端縁に一方の端部が接続さ
れる第1の固定端子板と、抵抗体の他端縁に一方の端部
が接続されるとともに当該端部近傍を略U字形に曲成し
て抵抗体並びに第1の固定端子板の少なくとも一部と対
向させた第2の固定端子板とを備え、抵抗体の電圧降下
を電圧信号として取り出すための複数の端子片を抵抗体
の側端縁より突設したことを特徴とし、抵抗体の側端縁
より端子片を突設しているため、例えば端子片にリード
線を接続した場合においてもリード線を抵抗体の側面方
向と異なる方向へ引き出すことができ、構造上の制約を
無くして設計の自由度を向上することができる。According to a first aspect of the present invention, in order to achieve the above object, a substantially flat resistor having a predetermined resistance value is provided, and one end is provided at one edge of the resistor. A first fixed terminal plate to be connected, one end of which is connected to the other end edge of the resistor, and the vicinity of the end is bent into a substantially U-shape to form the resistor and the first fixed terminal plate. A second fixed terminal plate opposed to at least a part thereof, wherein a plurality of terminal pieces for extracting a voltage drop of the resistor as a voltage signal are protruded from side edges of the resistor; Since the terminal strip protrudes from the side edge of the body, for example, even when a lead wire is connected to the terminal strip, the lead wire can be pulled out in a direction different from the side direction of the resistor, which imposes structural restrictions. It is possible to improve the degree of freedom of design without it.
【0007】請求項2の発明は、上記目的を達成するた
めに、所定の抵抗値を有する略平板状の抵抗体と、この
抵抗体の一端縁に一方の端部が接続される第1の固定端
子板と、抵抗体の他端縁に一方の端部が接続されるとと
もに抵抗体並びに第1の固定端子板の少なくとも一部と
対向させた第2の固定端子板とを備え、抵抗体の電圧降
下を電圧信号として取り出すための複数の端子片を抵抗
体の側端縁より突設したことを特徴とし、抵抗体の側端
縁より端子片を突設しているため、例えば端子片にリー
ド線を接続した場合においてもリード線を抵抗体の側面
方向と異なる方向へ引き出すことができ、構造上の制約
を無くして設計の自由度を向上することができる。しか
も、抵抗体と第2の固定端子板との間隔を狭くすること
ができるから、インダクタンス成分を低減して被測定電
流の検出誤差を小さくすることができる。According to a second aspect of the present invention, in order to achieve the above object, a substantially flat resistor having a predetermined resistance value, and a first end having one end connected to one edge of the resistor. A resistor, comprising: a fixed terminal plate; and a second fixed terminal plate, one end of which is connected to the other end of the resistor and which is opposed to at least a part of the resistor and the first fixed terminal plate. A plurality of terminal pieces for projecting the voltage drop of the resistor as a voltage signal are provided so as to protrude from the side edge of the resistor, and the terminal pieces are protruded from the side edge of the resistor. Even when a lead wire is connected to the resistor, the lead wire can be drawn out in a direction different from the side surface direction of the resistor, and the freedom of design can be improved by eliminating structural restrictions. In addition, since the distance between the resistor and the second fixed terminal plate can be reduced, the inductance component can be reduced and the error in detecting the measured current can be reduced.
【0008】請求項3の発明は、請求項1又は2の発明
において、少なくとも何れか一方の固定端子板の抵抗体
との接続部位に位置決め用の突起を設けたことを特徴と
し、抵抗体と固定端子板との接続位置が安定し、抵抗値
のばらつきを抑えることができる。According to a third aspect of the present invention, in the first or second aspect of the present invention, at least one of the fixed terminal plates is provided with a positioning projection at a connection portion with the resistor, and the position of the resistor and the fixed terminal plate is reduced. The connection position with the fixed terminal plate is stabilized, and variation in the resistance value can be suppressed.
【0009】請求項4の発明は、請求項1又は2の発明
において、少なくとも何れか一方の固定端子板の抵抗体
との接続部位に位置決め用の段差を設けたことを特徴と
し、抵抗体と固定端子板との接続位置が安定し、抵抗値
のばらつきを抑えることができる。さらに、段差を設け
ることで抵抗体と抵抗体に対向する固定端子板との間隔
を狭くすることができ、インダクタンス成分を低減して
被測定電流の検出誤差を小さくすることができる。According to a fourth aspect of the present invention, in the first or second aspect of the present invention, a step for positioning is provided at a connection portion of at least one of the fixed terminal plates with the resistor. The connection position with the fixed terminal plate is stabilized, and variation in the resistance value can be suppressed. Further, by providing the step, the distance between the resistor and the fixed terminal plate facing the resistor can be narrowed, the inductance component can be reduced, and the detection error of the measured current can be reduced.
【0010】請求項5の発明は、請求項1又は2の発明
において、抵抗体における第1の固定端子板及び第2の
固定端子板との接続部位よりも内側にある側端縁から端
子片を突設したことを特徴とし、第1の固定端子板及び
第2の固定端子板との接続部位に端子片を突設する場合
に比べて抵抗体の抵抗値が安定する。According to a fifth aspect of the present invention, in the first or the second aspect of the present invention, the terminal strip is formed from a side edge inside the connection portion between the resistor and the first fixed terminal plate and the second fixed terminal plate. The resistance value of the resistor is stabilized as compared with a case where a terminal piece is protruded at a connection portion between the first fixed terminal plate and the second fixed terminal plate.
【0011】請求項6の発明は、請求項1〜5の何れか
の発明において、少なくとも何れか一方の固定端子板の
抵抗体との接続部位近傍に放熱板を設けたことを特徴と
し、被測定電流が流れる抵抗体で発生した熱を効率よく
放熱することができて温度上昇を抑えることができる。According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, a radiator plate is provided near at least one of the fixed terminal plates in the vicinity of the connection portion with the resistor. The heat generated by the resistor through which the measurement current flows can be efficiently radiated, and the temperature rise can be suppressed.
【0012】請求項7の発明は、請求項1〜6の何れか
の発明において、複数の端子片を一体に形成したことを
特徴とし、端子片の寸法を大きくすることができ、例え
ばリード線を接続するためのレーザ溶接や抵抗溶接等に
よって接続部が溶けることが無く、しかも、リード線の
接続位置を変えることでリード線からみた抵抗体の抵抗
値を調整することができる。According to a seventh aspect of the present invention, in any one of the first to sixth aspects of the present invention, a plurality of terminal pieces are integrally formed, and the dimensions of the terminal pieces can be increased. The connection portion is not melted by laser welding, resistance welding, or the like for connection, and the resistance value of the resistor viewed from the lead wire can be adjusted by changing the connection position of the lead wire.
【0013】請求項8の発明は、請求項1〜7の何れか
の発明において、被覆抑えを有する接合用端子によりリ
ード線先端部をかしめ固定し、該接合用端子を抵抗体の
端子片に取り付けたことを特徴とし、リード線と抵抗体
の接続部分の強度が増し、接続部分の信頼性が向上でき
る。According to an eighth aspect of the present invention, in any one of the first to seventh aspects of the present invention, the leading end of the lead wire is caulked and fixed by a joining terminal having coating suppression, and the joining terminal is attached to a terminal piece of a resistor. The strength of the connection between the lead wire and the resistor is increased, and the reliability of the connection is improved.
【0014】請求項9の発明は、請求項1〜7の何れか
の発明において、端子片の先端部にリード線をかしめ固
定するための切れ込みを形成したことを特徴とし、リー
ド線を端子片に簡単に接続することができる。According to a ninth aspect of the present invention, in any one of the first to seventh aspects of the present invention, a notch for caulking and fixing a lead wire is formed at a tip end of the terminal piece. Can be easily connected to.
【0015】請求項10の発明は、上記目的を達成する
ために、請求項1〜9の何れかに記載のシャント抵抗の
抵抗値を調整する調整方法であって、抵抗体の端子片を
設けていない部位を削って抵抗値を調整することを特徴
とし、抵抗体の抵抗値を簡単に調整することができる。According to a tenth aspect of the present invention, there is provided an adjusting method for adjusting a resistance value of a shunt resistor according to any one of the first to ninth aspects, wherein the terminal piece of the resistor is provided. It is characterized in that the resistance value is adjusted by shaving off the unexposed parts, and the resistance value of the resistor can be easily adjusted.
【0016】[0016]
【発明の実施の形態】(実施形態1)図1及び図2を参
照して本発明の実施形態1を詳細に説明する。図1に示
すように本実施形態のシャント抵抗は、所定の抵抗値を
有する略平板状の抵抗体10と、この抵抗体10の一端
縁に一方の端部21が接続される第1の固定端子板20
と、抵抗体10の他端縁に一方の端部31が接続される
とともに当該端部31近傍を略U字形に曲成して抵抗体
10並びに第1の固定端子板20の少なくとも一部と対
向させた第2の固定端子板30と、抵抗体10の電圧降
下を電圧信号として取り出すために抵抗体10に接続さ
れる一対のリード線40,40とを備えている。(Embodiment 1) Embodiment 1 of the present invention will be described in detail with reference to FIGS. As shown in FIG. 1, the shunt resistor according to the present embodiment includes a substantially flat resistor 10 having a predetermined resistance value, and a first fixed member in which one end 21 is connected to one edge of the resistor 10. Terminal board 20
One end 31 is connected to the other end of the resistor 10, and the vicinity of the end 31 is bent into a substantially U-shape to form at least a part of the resistor 10 and the first fixed terminal plate 20. The semiconductor device includes a second fixed terminal plate 30 opposed to the first fixed terminal plate, and a pair of lead wires 40 connected to the resistor 10 for extracting a voltage drop of the resistor 10 as a voltage signal.
【0017】抵抗体10は、図2に示すように例えば銅
マンガン合金あるいは銅ニッケル合金により長尺の矩形
平板状に形成されており、長手方向に沿った両側の端縁
部11a,11bに第1及び第2の固定端子板20,3
0の端部21,31がそれぞれろう付けによって接合さ
れる。また、抵抗体10の長手方向に対向する一方の側
端縁からはリード線40,40を各々接続する一対の端
子片12,12が抵抗体10の長手方向に沿って一体に
突設されている。ところで、一般にシャント抵抗を用い
た電流測定では抵抗体10に被測定電流を流した際に生
じる電圧降下から電流値を求めるため、抵抗体10の抵
抗値をほぼ一定にする必要がある。一方、第1及び第2
の固定端子板20,30と接続される端縁部11a,1
1bでは抵抗体10の抵抗値が不安定になる。そこで、
本実施形態においては抵抗体10の両端縁部11a,1
1bよりも内側の部位から端子片12,12を突設して
抵抗値が安定するようにしている。As shown in FIG. 2, the resistor 10 is formed of, for example, a copper-manganese alloy or a copper-nickel alloy in a long rectangular flat plate shape. 1st and 2nd fixed terminal board 20,3
The 0 ends 21 and 31 are respectively joined by brazing. Further, a pair of terminal pieces 12, 12 for connecting the lead wires 40, 40, respectively, protrude integrally from one side edge of the resistor 10 along the longitudinal direction of the resistor 10. I have. By the way, in general, in current measurement using a shunt resistor, the current value is obtained from a voltage drop generated when a current to be measured flows through the resistor 10, so that the resistance value of the resistor 10 needs to be substantially constant. On the other hand, the first and second
Edges 11a, 1 connected to the fixed terminal plates 20, 30
1b, the resistance value of the resistor 10 becomes unstable. Therefore,
In the present embodiment, both end edges 11a, 1
The terminal strips 12 and 12 are provided so as to protrude from a portion inside from 1b so that the resistance value is stabilized.
【0018】第1の固定端子板20は、図1に示すよう
に電気銅あるいはHSM(EF−TEC4)のような導
電性金属材料からなり、矩形平板状の主部22の一方の
端部21近傍を略垂直に折曲することで全体が略L字形
に形成され、主部22の略中央には固定用のねじ(図示
せず)を挿通する丸形の挿通孔23が設けられている。
一方、端部21の抵抗体10が接合される側の面には主
部22に近づく向きに後退する段差24が設けてある。
この段差24に抵抗体10の端縁部11aを当接するこ
とで抵抗体10の端縁部11aと第1の固定端子板20
の端部21との位置決めが行える。さらに、端部21の
段差24よりも先端側には抵抗体10の発する熱を放熱
するための放熱板25が設けてある。この放熱板25は
第1の固定端子板20と一体に形成されており、端縁部
11aの先端から主部22に近づく向きに後退させて抵
抗体10との間に隙間が生じるようにしてある。As shown in FIG. 1, the first fixed terminal plate 20 is made of a conductive metal material such as electrolytic copper or HSM (EF-TEC4), and has one end 21 of a rectangular plate-shaped main portion 22. The whole is formed substantially L-shaped by bending the vicinity substantially vertically, and a round insertion hole 23 through which a fixing screw (not shown) is inserted is provided substantially in the center of the main part 22. .
On the other hand, a step 24 that retreats in a direction approaching the main part 22 is provided on the surface of the end part 21 on the side where the resistor 10 is joined.
By contacting the edge 11a of the resistor 10 with the step 24, the edge 11a of the resistor 10 and the first fixed terminal plate 20
Can be positioned with the end 21. Further, a heat radiating plate 25 for radiating the heat generated by the resistor 10 is provided on the end portion 21 on the tip side of the step 24. The heat radiating plate 25 is formed integrally with the first fixed terminal plate 20, and is retracted from the tip of the edge portion 11 a in a direction approaching the main portion 22 so that a gap is formed between the heat radiating plate 25 and the resistor 10. is there.
【0019】第2の固定端子板30は、図1に示すよう
に電気銅あるいはHSM(EF−TEC4)のような導
電性金属材料からなる板材を略L字形に折曲して平坦な
主部32並びに主部32に略直交する連結部33が一体
に形成され、連結部33の先端側が略U字形に折曲され
てその先が抵抗体10と接続する端部31となる。ま
た、主部32の略中央には固定用のねじ(図示せず)を
挿通する丸形の挿通孔34が設けられている。一方、端
部31の抵抗体10が接合される側の面には連結部33
から遠ざかる向きに後退する段差35が設けてある。こ
の段差35に抵抗体10の端縁部11bを当接すること
で抵抗体10の端縁部11bと第2の固定端子板30の
端部31との位置決めが行える。さらに、端部31の段
差35よりも先端側には抵抗体10の発する熱を放熱す
るための放熱板36が設けてある。この放熱板36は第
2の固定端子板30と一体に形成されており、端縁部1
1bの先端より連結部33から遠ざかる向きに後退させ
て抵抗体10との間に隙間が生じるようにしてある。As shown in FIG. 1, the second fixed terminal plate 30 is formed by bending a plate made of a conductive metal material such as electrolytic copper or HSM (EF-TEC4) into a substantially L-shape to form a flat main portion. A connecting portion 33 substantially orthogonal to the main portion 32 and the main portion 32 is integrally formed, and the distal end side of the connecting portion 33 is bent into a substantially U-shape to form an end portion 31 connected to the resistor 10. At a substantially center of the main portion 32, a round insertion hole 34 for inserting a fixing screw (not shown) is provided. On the other hand, the connecting portion 33 is provided on the surface of the end portion 31 on the side where the resistor 10 is joined.
There is provided a step 35 that retreats in a direction away from the camera. By contacting the edge 11b of the resistor 10 with the step 35, the edge 11b of the resistor 10 and the end 31 of the second fixed terminal plate 30 can be positioned. Further, a heat radiating plate 36 for radiating the heat generated by the resistor 10 is provided on the distal end side of the end portion 31 with respect to the step 35. The heat radiating plate 36 is formed integrally with the second fixed terminal plate 30, and
1b is retracted in a direction away from the connecting portion 33 so that a gap is formed between the resistor 1 and the resistor 10.
【0020】ここで、本実施形態のシャント抵抗は以下
の手順で組み立てられる。まず、抵抗体10の抵抗値が
所望の値となるように抵抗値を調整する。すなわち、抵
抗体10の両端縁部11a,11b間に既知の電流を流
し、端子片12,12間の電圧(抵抗体10に生じる電
圧降下)から抵抗値を計測する。そして、計測した抵抗
値が所望の値となるように抵抗体10の端子片12,1
2を設けていない部位(抵抗体10の長手方向に対向す
る他方の側端縁)を削って抵抗値を調整する。このよう
に抵抗体10を削るだけで簡単に抵抗値を調整すること
ができる。Here, the shunt resistor of this embodiment is assembled in the following procedure. First, the resistance is adjusted so that the resistance of the resistor 10 becomes a desired value. That is, a known current is applied between both end portions 11a and 11b of the resistor 10, and the resistance value is measured from the voltage between the terminal pieces 12 and 12 (voltage drop generated in the resistor 10). Then, the terminal strips 12, 1 of the resistor 10 are set so that the measured resistance value becomes a desired value.
A portion not provided with 2 (the other side edge facing the longitudinal direction of the resistor 10) is shaved to adjust the resistance value. Thus, the resistance value can be easily adjusted only by shaving the resistor 10.
【0021】次に抵抗値の調整が済んだ抵抗体10の端
子片12,12にリード線40,40を接続する。な
お、端子片12とリード線40との接続は半田付け、レ
ーザ溶接あるいは抵抗溶接等の適宜の方法で行えばよ
い。そして、リード線40を接続した抵抗体10の一方
の端縁部11aを第1の固定端子板20の端部21に設
けた段差24に当接して位置決めし、抵抗体10の端縁
部11aと第1の固定端子板20の端部21とをろう付
けによって接合する。続いて、抵抗体10の他方の端縁
部11bを第2の固定端子板30の端部31に設けた段
差35に当接して位置決めし、抵抗体10の端縁部11
bと第2の固定端子板30の端部31とをろう付けによ
って接合する。そして、抵抗体10の端縁部11aに接
合した端部31近傍において連結部33を略U字形に折
曲し、第2の固定端子板30の連結部33を抵抗体10
並びに第1の固定端子板20の端部21と略平行に対向
させる。なお、このように抵抗体10と第2の固定端子
板30とを対向させることにより、抵抗体10と第2の
固定端子板30に各々流れる被測定電流に基づいて発生
する磁界の多くが互いに相殺され、シャント抵抗のイン
ダクタンス成分を低減して被測定電流の検出誤差を小さ
くすることができる。Next, lead wires 40, 40 are connected to the terminal strips 12, 12 of the resistor 10 whose resistance has been adjusted. The connection between the terminal strip 12 and the lead wire 40 may be performed by an appropriate method such as soldering, laser welding, or resistance welding. Then, one edge 11a of the resistor 10 to which the lead wire 40 is connected is positioned in contact with the step 24 provided at the end 21 of the first fixed terminal plate 20, and the edge 11a of the resistor 10 is positioned. And the end 21 of the first fixed terminal board 20 are joined by brazing. Subsequently, the other edge 11 b of the resistor 10 is positioned in contact with the step 35 provided on the end 31 of the second fixed terminal plate 30, and the edge 11 b of the resistor 10 is positioned.
b and the end 31 of the second fixed terminal plate 30 are joined by brazing. In the vicinity of the end 31 joined to the edge 11a of the resistor 10, the connecting portion 33 is bent into a substantially U-shape, and the connecting portion 33 of the second fixed terminal plate 30 is connected to the resistor 10
In addition, the first fixed terminal plate 20 is opposed to the end 21 substantially in parallel. In this way, by making the resistor 10 and the second fixed terminal plate 30 face each other, most of the magnetic fields generated based on the current to be measured flowing through the resistor 10 and the second fixed terminal plate 30 are mutually exchanged. Thus, the inductance component of the shunt resistance is reduced, and the detection error of the measured current can be reduced.
【0022】本実施形態のシャント抵抗は上述のような
構造を有するものであり、リード線40,40を接続す
る端子片12,12を抵抗体10の側端縁より突設した
ので、リード線40,40を第1及び第2の固定端子板
20,30と異なる方向へ引き出すことができる。その
結果、抵抗体10の側面方向を開放しておかなければな
らないといった従来の構造上の制約が無くなり、設計の
自由度を向上することができる。特に本実施形態では、
リード線40が抵抗体10の側面方向に突出しないこと
から、第2の固定端子板30の連結部33を略U字形に
折曲して抵抗体10及び第1の固定端子板20との間隔
を狭くした構造とすることができる。さらに、第1及び
第2の固定端子板20,30の端部21,31に放熱板
25,36を設ける際にリード線40,40が邪魔にな
らず、リード線40,40を逃げるために固定端子板2
0,30の形状を複雑化する必要が無くなり、シャント
抵抗の小型化が図れる。また、第1及び第2の固定端子
板20,30の抵抗体10との接続部位である端部2
1,31に位置決め用の段差25,36を設けているの
で、抵抗体10と第1及び第2の固定端子板20,30
との接続位置が安定し、抵抗値のばらつきを抑えること
ができる。さらに、第1及び第2の固定端子板20,3
0の抵抗体10との接続部位である端部21,31近傍
に放熱板25,36を設けているので、被測定電流が流
れる抵抗体10で発生した熱を効率よく放熱することが
できて温度上昇を抑えることができる。なお、本実施形
態ではリード線40,40を先に端子片12,12に接
続してから抵抗体10を第1及び第2の固定端子板2
0,30に接合しているが、反対に抵抗体10を第1及
び第2の固定端子板20,30に接合した後にリード線
40,40を抵抗体10の端子片12,12に接続する
ようにしても良い。また、第1及び第2の固定端子板2
0,30を抵抗体10に接合する順序は逆であっても良
い。The shunt resistor of the present embodiment has the above-described structure, and the terminal strips 12, 12 connecting the lead wires 40, 40 protrude from the side edge of the resistor 10, so that the lead wire is provided. The first and second fixed terminal boards 20 and 30 can be drawn out in different directions. As a result, the conventional structural restriction that the side surface direction of the resistor 10 must be opened is eliminated, and the degree of freedom in design can be improved. Particularly in the present embodiment,
Since the lead wire 40 does not protrude in the side direction of the resistor 10, the connecting portion 33 of the second fixed terminal plate 30 is bent into a substantially U-shape to form a space between the resistor 10 and the first fixed terminal plate 20. Can be reduced. Further, when the heat radiating plates 25, 36 are provided at the end portions 21, 31 of the first and second fixed terminal plates 20, 30, the lead wires 40, 40 do not interfere, and the lead wires 40, 40 escape. Fixed terminal board 2
There is no need to complicate the shapes of 0 and 30 and the shunt resistance can be reduced in size. Further, an end 2 which is a connection portion between the first and second fixed terminal plates 20 and 30 and the resistor 10.
Since the positioning steps 25 and 36 are provided in the first and the first 31, the resistor 10 and the first and second fixed terminal plates 20, 30 are provided.
And the connection position with the resistor is stabilized, and variation in the resistance value can be suppressed. Further, the first and second fixed terminal plates 20, 3
Since the heat radiating plates 25 and 36 are provided in the vicinity of the ends 21 and 31 which are the connection portions with the zero resistor 10, heat generated in the resistor 10 through which the current to be measured flows can be efficiently radiated. Temperature rise can be suppressed. In this embodiment, the lead wires 40, 40 are first connected to the terminal strips 12, 12, and then the resistor 10 is connected to the first and second fixed terminal plates 2.
The lead wires 40 are connected to the terminal pieces 12 of the resistor 10 after the resistor 10 is connected to the first and second fixed terminal plates 20 and 30. You may do it. In addition, the first and second fixed terminal plates 2
The order in which 0 and 30 are joined to the resistor 10 may be reversed.
【0023】ところで、温度や湿度等の周囲環境の影響
を受け難くするために、図3に示すように抵抗体10、
第1の固定端子板20の端部21並びに第2の固定端子
板30の連結部33及び端部31を合成樹脂成型部60
と一体成型し、所謂樹脂モールドしても良い。By the way, as shown in FIG. 3, the resistors 10 and 10 are hardly affected by the surrounding environment such as temperature and humidity.
The connecting portion 33 and the end portion 31 of the first fixed terminal plate 20 and the connecting portion 33 and the end portion 31 of the second fixed terminal plate 30 are
And a so-called resin mold.
【0024】また、図4に示すように抵抗体10の各端
子片12,12に略U字形の切り込み12aを形成し、
この切り込み12aにリード線40を挿入してかしめる
ことによって端子片12にリード線40を接続する構造
とすれば、レーザ溶接や抵抗溶接に比べてリード線40
を端子片12に簡単に接続することができる。As shown in FIG. 4, a substantially U-shaped cut 12a is formed in each of the terminal pieces 12, 12 of the resistor 10,
If the lead wire 40 is connected to the terminal strip 12 by inserting the lead wire 40 into the notch 12a and caulking, the lead wire 40 can be connected to the terminal piece 12 as compared with laser welding or resistance welding.
Can be easily connected to the terminal strip 12.
【0025】(実施形態2)図5及び図6を参照して本
発明の実施形態2を説明する。但し、本実施形態は第2
の固定端子板50の構造が異なる点を除いて、その他の
基本構成は実施形態1と共通であるので、共通する構成
には同一の符号を付して説明を省略する。(Embodiment 2) Embodiment 2 of the present invention will be described with reference to FIGS. However, this embodiment is the second
Except for the point that the structure of the fixed terminal plate 50 is different, the other basic configuration is the same as that of the first embodiment.
【0026】本実施形態における第2の固定端子板50
は、図5に示すように電気銅あるいはHSM(EF−T
EC4)のような導電性金属材料からなる板材を略L字
形に折曲して平坦な主部52並びに主部52に略直交す
る連結部53が一体に形成され、連結部53の先端部分
が抵抗体10と接続する端部51となる。また、主部5
2の略中央には固定用のねじ(図示せず)を挿通する丸
形の挿通孔54が設けられている。一方、端部51と連
結部53との間には主部52に近づく向きに後退する段
差55が設けてある。そして、図6に示すように第2の
固定端子板50の端部51と抵抗体10の端縁部11b
がろう付けによって接合される。The second fixed terminal plate 50 in the present embodiment
As shown in FIG. 5, electrolytic copper or HSM (EF-T
A flat main portion 52 and a connecting portion 53 substantially orthogonal to the main portion 52 are integrally formed by bending a plate material made of a conductive metal material such as EC4) into a substantially L-shape. The end 51 is connected to the resistor 10. The main part 5
At the approximate center of 2, a round insertion hole 54 for inserting a fixing screw (not shown) is provided. On the other hand, a step 55 is provided between the end portion 51 and the connecting portion 53 so as to retreat toward the main portion 52. Then, as shown in FIG. 6, the end 51 of the second fixed terminal plate 50 and the edge 11b of the resistor 10 are formed.
Are joined by brazing.
【0027】而して、本実施形態においては抵抗体10
の第1の固定端子板20の端部21が接合される面と反
対側の面に第2の固定端子板50の端部51を接合し、
端部51と連結部53の間に設けた段差55によって抵
抗体10との間隔を確保する構造としているので、実施
形態1のように抵抗体10の端縁部11aに接合した端
部31近傍において連結部33を略U字形に折曲する構
造に比較して、抵抗体10と第2の固定端子板50(連
結部53)との間隔を狭くすることができる。このた
め、実施形態1に比べてシャント抵抗のインダクタンス
成分をさらに低減して被測定電流の検出誤差をより小さ
くすることができる。また、実施形態1のように第2の
固定端子板30を略U字形に折曲する必要がないから、
製造工程が簡素化できるととともに、抵抗体10の長手
方向に直交する方向に沿った第2の固定端子板50の連
結部53の高さ寸法を小さくして小型化が図れるという
利点がある。Thus, in the present embodiment, the resistor 10
The end 51 of the second fixed terminal plate 50 is joined to the surface opposite to the surface to which the end 21 of the first fixed terminal plate 20 is joined,
Since the gap between the resistor 10 and the resistor 10 is ensured by the step 55 provided between the end 51 and the connecting portion 53, the vicinity of the end 31 joined to the edge 11a of the resistor 10 as in the first embodiment In this case, the distance between the resistor 10 and the second fixed terminal plate 50 (the connecting portion 53) can be reduced as compared with a structure in which the connecting portion 33 is bent into a substantially U-shape. Therefore, compared to the first embodiment, the inductance component of the shunt resistor can be further reduced, and the detection error of the measured current can be further reduced. Further, since it is not necessary to bend the second fixed terminal plate 30 into a substantially U-shape as in the first embodiment,
There is an advantage that the manufacturing process can be simplified, and the height of the connecting portion 53 of the second fixed terminal plate 50 along the direction orthogonal to the longitudinal direction of the resistor 10 can be reduced to achieve downsizing.
【0028】(実施形態3)本実施形態は、第1の固定
端子板20の端部21に抵抗体10を位置決めする構造
が異なる点を除いて、その他の基本構成は実施形態2と
共通であるので、共通する構成には同一の符号を付して
説明を省略する。(Embodiment 3) This embodiment is the same as Embodiment 2 except that the structure for positioning the resistor 10 at the end 21 of the first fixed terminal plate 20 is different. Therefore, common components are denoted by the same reference numerals, and description thereof is omitted.
【0029】本実施形態では、第1の固定端子板20の
端部21に段差24を設ける代わりに、図7に示すよう
に端部21の抵抗体10が接合される側の面に位置決め
用の突起26を設けている。而して、図7に示すように
端部21に設けた突起26に抵抗体10の端縁部11a
を当接することで抵抗体10を第1の固定端子板20の
端部21に位置決めし、抵抗体10の端部21に対する
接合位置を安定させることができる。In the present embodiment, instead of providing a step 24 at the end 21 of the first fixed terminal plate 20, as shown in FIG. Are provided. Thus, as shown in FIG. 7, the protrusion 26 provided on the end 21 is
The resistor 10 is positioned at the end 21 of the first fixed terminal plate 20 by abutting the contact, and the joining position of the resistor 10 with respect to the end 21 can be stabilized.
【0030】なお、図8に示すように抵抗体10の端縁
部11aに突起26と嵌合する嵌合凹所13を形成し、
嵌合凹所13に突起26を嵌合して位置決めする構造と
すれば、より確実に位置決めを行うことができる。As shown in FIG. 8, a fitting recess 13 for fitting with the projection 26 is formed in the edge 11a of the resistor 10,
With a structure in which the projection 26 is fitted into the fitting recess 13 and positioned, the positioning can be performed more reliably.
【0031】ところで、実施形態1〜3においては抵抗
体10に2つの端子片12,12を設けてリード線4
0,40を各端子片12,12に個別に接続している
が、抵抗体10を形成する金属材料の熱容量が比較的小
さいことから、リード線40を接続する際のレーザ溶接
や抵抗溶接等の熱で端子片12,12が溶けてしまう虞
がある。そこで、図9に示すように各リード線40,4
0を接続する端子片12’を一体に形成することで端子
片12’の寸法を大きくすれば、リード線40を接続す
るためのレーザ溶接や抵抗溶接等によって端子片12’
が溶ける虞が無くなる。しかも、端子片12’の寸法が
大きくなることでリード線40,40の接続位置を変え
ることができ、その結果、リード線40,40からみた
抵抗体10の抵抗値を接続位置によって調整することが
できる。In the first to third embodiments, the resistor 10 is provided with two terminal pieces 12
0, 40 are individually connected to the respective terminal strips 12, 12, but since the heat capacity of the metal material forming the resistor 10 is relatively small, laser welding, resistance welding, or the like when connecting the lead wire 40 is performed. The terminal pieces 12 may be melted by the heat. Therefore, as shown in FIG.
If the size of the terminal strip 12 ′ is increased by integrally forming the terminal strip 12 ′ for connecting the lead wire 40, the terminal strip 12 ′ may be formed by laser welding or resistance welding for connecting the lead wire 40.
There is no risk of melting. In addition, the connection position of the lead wires 40, 40 can be changed by increasing the size of the terminal strip 12 '. As a result, the resistance value of the resistor 10 viewed from the lead wires 40, 40 can be adjusted by the connection position. Can be.
【0032】また、リード線40を抵抗体10の端子片
12と固定する際にろう材を用いた場合、ろう材で固め
たリード線40の先端部41において、ろう材の浸透部
分と未浸透部分の境界部位が振動によって折れてしまう
虞がある。そこで、図10に示すようにいわゆる被覆抑
え付圧着タブ端子14に先端部41の被覆を取り除いた
リード線40を挿入してかしめ、上記タブ端子14と端
子片12をスポット溶接等で固定すれば、リード線40
と抵抗体10の接続部分の強度が増し、振動などによっ
てリード線40が折れることを防止できる。さらにリー
ド線40の先端部41をタブ端子14と半田で固定する
構造とすれば、接続部分の強度がさらに増し、固定状態
が安定することにより接続部分の信頼性を向上できる。When a brazing material is used to fix the lead wire 40 to the terminal piece 12 of the resistor 10, the permeated portion of the brazing material and the unpermeated portion are formed at the tip 41 of the lead wire 40 solidified with the brazing material. There is a possibility that the boundary portion of the portion is broken by vibration. Then, as shown in FIG. 10, the lead wire 40 from which the coating of the tip portion 41 has been removed is inserted into the so-called crimping tab terminal 14 with coating suppression and swaged, and the tab terminal 14 and the terminal piece 12 are fixed by spot welding or the like. , Lead wire 40
The strength of the connection portion between the lead wire and the resistor 10 is increased, and the lead wire 40 can be prevented from breaking due to vibration or the like. Further, if the tip portion 41 of the lead wire 40 is fixed to the tab terminal 14 with solder, the strength of the connection portion is further increased, and the fixing state is stabilized, so that the reliability of the connection portion can be improved.
【0033】[0033]
【発明の効果】請求項1の発明は、所定の抵抗値を有す
る略平板状の抵抗体と、この抵抗体の一端縁に一方の端
部が接続される第1の固定端子板と、抵抗体の他端縁に
一方の端部が接続されるとともに当該端部近傍を略U字
形に曲成して抵抗体並びに第1の固定端子板の少なくと
も一部と対向させた第2の固定端子板とを備え、抵抗体
の電圧降下を電圧信号として取り出すための複数の端子
片を抵抗体の側端縁より突設したので、抵抗体の側端縁
より端子片を突設しているため、例えば端子片にリード
線を接続した場合においてもリード線を抵抗体の側面方
向と異なる方向へ引き出すことができ、構造上の制約を
無くして設計の自由度を向上することができるという効
果がある。According to the first aspect of the present invention, there is provided a substantially flat resistor having a predetermined resistance value, a first fixed terminal plate having one end connected to one end of the resistor, and a resistor. A second fixed terminal having one end connected to the other end of the body and having the vicinity of the end bent in a substantially U-shape to face the resistor and at least a part of the first fixed terminal plate; Plate, and a plurality of terminal pieces for extracting a voltage drop of the resistor as a voltage signal are protruded from the side edge of the resistor, so that the terminal pieces are protruded from the side edge of the resistor. For example, even when a lead wire is connected to the terminal piece, the lead wire can be drawn out in a direction different from the side surface direction of the resistor, and the effect of eliminating the structural restriction and improving the degree of freedom in design can be obtained. is there.
【0034】請求項2の発明は、所定の抵抗値を有する
略平板状の抵抗体と、この抵抗体の一端縁に一方の端部
が接続される第1の固定端子板と、抵抗体の他端縁に一
方の端部が接続されるとともに抵抗体並びに第1の固定
端子板の少なくとも一部と対向させた第2の固定端子板
とを備え、抵抗体の電圧降下を電圧信号として取り出す
ための複数の端子片を抵抗体の側端縁より突設したの
で、抵抗体の側端縁より端子片を突設しているため、例
えば端子片にリード線を接続した場合においてもリード
線を抵抗体の側面方向と異なる方向へ引き出すことがで
き、構造上の制約を無くして設計の自由度を向上するこ
とができるという効果がある。しかも、抵抗体と第2の
固定端子板との間隔を狭くすることができるから、イン
ダクタンス成分を低減して被測定電流の検出誤差を小さ
くすることができるという効果がある。According to a second aspect of the present invention, there is provided a substantially flat resistor having a predetermined resistance value, a first fixed terminal plate having one end connected to one edge of the resistor, One end is connected to the other end, and a resistor and a second fixed terminal plate facing at least a part of the first fixed terminal plate are provided, and a voltage drop of the resistor is extracted as a voltage signal. Because a plurality of terminal strips are protruded from the side edge of the resistor, the terminal strips are protruded from the side edge of the resistor. Can be drawn out in a direction different from the side surface direction of the resistor, and there is an effect that the degree of freedom in design can be improved by eliminating structural restrictions. In addition, since the distance between the resistor and the second fixed terminal plate can be reduced, there is an effect that the inductance component can be reduced and the detection error of the measured current can be reduced.
【0035】請求項3の発明は、請求項1又は2の発明
において、少なくとも何れか一方の固定端子板の抵抗体
との接続部位に位置決め用の突起を設けたので、抵抗体
と固定端子板との接続位置が安定し、抵抗値のばらつき
を抑えることができるという効果がある。According to a third aspect of the present invention, in the first or second aspect of the present invention, at least one of the fixed terminal plates is provided with a positioning protrusion at a connection portion with the resistor, so that the resistor and the fixed terminal plate are provided. This has the effect of stabilizing the connection position with respect to and suppressing variations in the resistance value.
【0036】請求項4の発明は、請求項1又は2の発明
において、少なくとも何れか一方の固定端子板の抵抗体
との接続部位に位置決め用の段差を設けたので、抵抗体
と固定端子板との接続位置が安定し、抵抗値のばらつき
を抑えることができるという効果がある。さらに、段差
を設けることで抵抗体と抵抗体に対向する固定端子板と
の間隔を狭くすることができ、インダクタンス成分を低
減して被測定電流の検出誤差を小さくすることができる
という効果がある。According to a fourth aspect of the present invention, in the first or second aspect of the present invention, at least one of the fixed terminal plates is provided with a positioning step at a connection portion with the resistor, so that the resistor and the fixed terminal plate are provided. This has the effect of stabilizing the connection position with respect to and suppressing variations in the resistance value. Further, by providing the step, the distance between the resistor and the fixed terminal plate facing the resistor can be narrowed, and the inductance component can be reduced to reduce the detection error of the current to be measured. .
【0037】請求項5の発明は、請求項1又は2の発明
において、抵抗体における第1の固定端子板及び第2の
固定端子板との接続部位よりも内側にある側端縁から端
子片を突設したので、第1の固定端子板及び第2の固定
端子板との接続部位に端子片を突設する場合に比べて抵
抗体の抵抗値が安定するという効果がある。According to a fifth aspect of the present invention, in the first or the second aspect of the present invention, the terminal strip is formed from a side edge inside the connecting portion of the resistor with the first fixed terminal plate and the second fixed terminal plate. Is protruded, so that the resistance value of the resistor is more stable than when a terminal piece is protruded at a connection portion between the first fixed terminal plate and the second fixed terminal plate.
【0038】請求項6の発明は、請求項1〜5の何れか
の発明において、少なくとも何れか一方の固定端子板の
抵抗体との接続部位近傍に放熱板を設けたので、被測定
電流が流れる抵抗体で発生した熱を効率よく放熱するこ
とができて温度上昇を抑えることができるという効果が
ある。According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, a heat radiating plate is provided near at least one of the fixed terminal plates in the vicinity of the connection portion with the resistor. There is an effect that the heat generated by the flowing resistor can be efficiently radiated and the temperature rise can be suppressed.
【0039】請求項7の発明は、請求項1〜6の何れか
の発明において、複数の端子片を一体に形成したので、
端子片の寸法を大きくすることができ、例えばリード線
を接続するためのレーザ溶接や抵抗溶接等によって接続
部が溶けることが無く、しかも、リード線の接続位置を
変えることでリード線からみた抵抗体の抵抗値を調整す
ることができるという効果がある。According to a seventh aspect of the present invention, in any one of the first to sixth aspects, a plurality of terminal pieces are integrally formed.
The dimensions of the terminal strips can be increased, so that the connection parts are not melted by laser welding or resistance welding for connecting the lead wires, for example, and by changing the connection position of the lead wires, the resistance seen from the lead wires can be reduced. There is an effect that the resistance value of the body can be adjusted.
【0040】請求項8の発明は、請求項1〜7の何れか
の発明において、被覆抑えを有する接合用端子によりリ
ード線先端部をかしめ固定し、該接合用端子を抵抗体の
端子片に取り付けたので、リード線と抵抗体の接続部分
の強度が増し、接続部分の信頼性が向上できるという効
果がある。According to an eighth aspect of the present invention, in any one of the first to seventh aspects of the present invention, the leading end of the lead wire is caulked and fixed by a joining terminal having coating suppression, and the joining terminal is attached to a terminal piece of a resistor. Since it is attached, the strength of the connecting portion between the lead wire and the resistor is increased, and the reliability of the connecting portion can be improved.
【0041】請求項9の発明は、請求項1〜7の何れか
の発明において、端子片の先端部にリード線をかしめ固
定するための切れ込みを形成したので、リード線を端子
片に簡単に接続することができるという効果がある。According to a ninth aspect of the present invention, in any one of the first to seventh aspects, a notch for caulking and fixing the lead wire is formed at the tip of the terminal piece, so that the lead wire can be easily connected to the terminal piece. There is an effect that it can be connected.
【0042】請求項10の発明は、請求項1〜9の何れ
かに記載のシャント抵抗の抵抗値を調整する調整方法で
あって、抵抗体の端子片を設けていない部位を削って抵
抗値を調整するので、抵抗体の抵抗値を簡単に調整する
ことができるという効果がある。According to a tenth aspect of the present invention, there is provided an adjusting method for adjusting a resistance value of a shunt resistor according to any one of the first to ninth aspects, wherein a portion of the resistor body where no terminal piece is provided is removed. Therefore, there is an effect that the resistance value of the resistor can be easily adjusted.
【図1】実施形態1を示し、(a)は平面図、(b)は
同図(a)のA−A線断面矢視図、(c)は同図(b)
のB−B線断面矢視図、(d)は側面図である。FIGS. 1A and 1B show a first embodiment, in which FIG. 1A is a plan view, FIG. 1B is a sectional view taken along the line AA of FIG. 1A, and FIG. 1C is FIG.
(D) is a side view.
【図2】同上における抵抗体の平面図である。FIG. 2 is a plan view of the resistor shown in FIG.
【図3】同上の他の構成を示し、(a)は平面図、
(b)は同図(a)のA−A線断面矢視図、(c)は同
図(b)のB−B線断面矢視図、(d)は側面図であ
る。3A and 3B show another configuration of the above, wherein FIG.
(B) is a sectional view taken along the line AA in FIG. (A), (c) is a sectional view taken along the line BB in FIG. (B), and (d) is a side view.
【図4】同上における抵抗体の他の構成を示す平面図で
ある。FIG. 4 is a plan view showing another configuration of the resistor in the above.
【図5】実施形態2を示し、(a)は平面図、(b)は
同図(a)のA−A線断面矢視図である。5A and 5B show a second embodiment, in which FIG. 5A is a plan view, and FIG. 5B is a sectional view taken along line AA of FIG.
【図6】同上の要部側断面図である。FIG. 6 is a side sectional view of a main part of the above.
【図7】実施形態3を示す要部側断面図である。FIG. 7 is a side sectional view showing a main part of a third embodiment.
【図8】同上の他の構成を示す要部側断面図である。FIG. 8 is a sectional side view of a main part showing another configuration of the above.
【図9】同上における抵抗体の他の構成を示す平面図で
ある。FIG. 9 is a plan view showing another configuration of the resistor shown in FIG.
【図10】実施形態1〜3における抵抗体とリード線の
固定構造の一例を示す斜視図である。FIG. 10 is a perspective view showing an example of a fixing structure of a resistor and a lead wire according to the first to third embodiments.
【図11】従来例を示す側面図である。FIG. 11 is a side view showing a conventional example.
10 抵抗体 11a,11b 端縁部 12 端子片 20 第1の固定端子板 21 端部 30 第2の固定端子板 31 端部 40 リード線 DESCRIPTION OF SYMBOLS 10 Resistor 11a, 11b Edge 12 Terminal strip 20 First fixed terminal board 21 End 30 Second fixed terminal board 31 End 40 Lead wire
───────────────────────────────────────────────────── フロントページの続き (72)発明者 星野 就俊 大阪府門真市大字門真1048番地松下電工株 式会社内 Fターム(参考) 2G025 AA05 AA08 AB05 5E032 BA04 BA11 BB01 TB02 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor, Toshitoshi Hoshino 1048, Kazuma, Kadoma, Osaka Pref. Matsushita Electric Works, Ltd. F-term (reference)
Claims (10)
と、この抵抗体の一端縁に一方の端部が接続される第1
の固定端子板と、抵抗体の他端縁に一方の端部が接続さ
れるとともに当該端部近傍を略U字形に曲成して抵抗体
並びに第1の固定端子板の少なくとも一部と対向させた
第2の固定端子板とを備え、抵抗体の電圧降下を電圧信
号として取り出すための複数の端子片を抵抗体の側端縁
より突設したことを特徴とするシャント抵抗。1. A substantially flat resistor having a predetermined resistance value, and a first resistor having one end connected to one edge of the resistor.
And one end is connected to the other end of the resistor, and the vicinity of the end is bent into a substantially U-shape to face the resistor and at least a part of the first fixed terminal plate. A shunt resistor, comprising: a plurality of terminal pieces for projecting a voltage drop of the resistor as a voltage signal from a side edge of the resistor.
と、この抵抗体の一端縁に一方の端部が接続される第1
の固定端子板と、抵抗体の他端縁に一方の端部が接続さ
れるとともに抵抗体並びに第1の固定端子板の少なくと
も一部と対向させた第2の固定端子板とを備え、抵抗体
の電圧降下を電圧信号として取り出すための複数の端子
片を抵抗体の側端縁より突設したことを特徴とするシャ
ント抵抗。2. A substantially flat resistor having a predetermined resistance value, and a first resistor having one end connected to one edge of the resistor.
And a second fixed terminal plate having one end connected to the other end of the resistor, and facing the resistor and at least a part of the first fixed terminal plate. A shunt resistor characterized in that a plurality of terminal pieces for extracting a voltage drop of a body as a voltage signal are protruded from side edges of the resistor.
抗体との接続部位に位置決め用の突起を設けたことを特
徴とする請求項1又は2記載のシャント抵抗。3. The shunt resistor according to claim 1, wherein at least one of the fixed terminal plates is provided with a positioning projection at a connection portion with the resistor.
抗体との接続部位に位置決め用の段差を設けたことを特
徴とする請求項1又は2記載のシャント抵抗。4. The shunt resistor according to claim 1, wherein a positioning step is provided at a connection portion of at least one of the fixed terminal plates with the resistor.
2の固定端子板との接続部位よりも内側にある側端縁か
ら端子片を突設したことを特徴とする請求項1又は2記
載のシャント抵抗。5. A terminal element according to claim 1, wherein a terminal piece protrudes from a side edge inside the connection portion between the resistor and the first fixed terminal plate and the second fixed terminal plate. The stated shunt resistance.
抗体との接続部位近傍に放熱板を設けたことを特徴とす
る請求項1〜5の何れかに記載のシャント抵抗。6. The shunt resistor according to claim 1, wherein a radiator plate is provided near at least one of the fixed terminal plates in the vicinity of the connection portion with the resistor.
徴とする請求項1〜6の何れかに記載のシャント抵抗。7. The shunt resistor according to claim 1, wherein a plurality of terminal pieces are integrally formed.
ド線先端部をかしめ固定し、該接合用端子を抵抗体の端
子片に取り付けたことを特徴とする請求項1〜7の何れ
かに記載のシャント抵抗。8. The terminal according to claim 1, wherein the lead wire tip is caulked and fixed by a joining terminal having coating suppression, and the joining terminal is attached to a terminal piece of a resistor. Shunt resistance.
するための切れ込みを形成したことを特徴とする請求項
1〜7の何れかに記載のシャント抵抗。9. The shunt resistor according to claim 1, wherein a notch for caulking and fixing a lead wire is formed at a tip portion of the terminal piece.
ト抵抗の抵抗値を調整する調整方法であって、抵抗体の
端子片を設けていない部位を削って抵抗値を調整するこ
とを特徴とするシャント抵抗の抵抗値の調整方法。10. A method for adjusting a resistance value of a shunt resistor according to claim 1, wherein the resistance value is adjusted by removing a portion of the resistor body where no terminal piece is provided. How to adjust the characteristic value of the shunt resistor.
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JP2001-6728 | 2001-01-15 | ||
JP2002006391A JP4032750B2 (en) | 2001-01-15 | 2002-01-15 | Shunt resistor and adjustment method |
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