JP3379240B2 - Four-terminal shunt resistor - Google Patents
Four-terminal shunt resistorInfo
- Publication number
- JP3379240B2 JP3379240B2 JP24664594A JP24664594A JP3379240B2 JP 3379240 B2 JP3379240 B2 JP 3379240B2 JP 24664594 A JP24664594 A JP 24664594A JP 24664594 A JP24664594 A JP 24664594A JP 3379240 B2 JP3379240 B2 JP 3379240B2
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- Japan
- Prior art keywords
- current
- shunt resistor
- resistance
- resistor
- terminal
- Prior art date
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Description
【０００１】[0001]
【産業上の利用分野】この発明は、プリント基板上に実
装され汎用インバータの回路電流測定に供されるシャン
ト抵抗に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shunt resistor mounted on a printed circuit board and used for measuring a circuit current of a general-purpose inverter.
【０００２】[0002]
【従来の技術】従来のこの種のシャント抵抗としては図
３の斜視図に例示するものが知られている。なお、図４
はその取り付け状態の概略をも含めて示す前記シャント
抵抗の側面図である。先ず、図３において、３はマンガ
ニン等その抵抗温度係数の小なる帯状抵抗体よりなるシ
ャント抵抗であり、３ａはこの抵抗の両端においてＬ字
形等に折り曲げ形成された抵抗脚部であり、４は図示し
ていないプリント基板における配線用のパターン導体で
ある。また、図４において、６は前記のシャント抵抗３
をその抵抗脚部３ａにて前記のパターン導体４に固定接
続するハンダであり、５は前記プリント基板の絶縁基板
である。2. Description of the Related Art As a conventional shunt resistor of this type, the one illustrated in the perspective view of FIG. 3 is known. Note that FIG.
FIG. 4 is a side view of the shunt resistor including an outline of its attached state. First, in FIG. 3, 3 is a shunt resistor composed of a strip-shaped resistor having a small temperature coefficient of resistance such as manganin, 3a is a resistance leg portion bent at both ends of the resistor into an L-shape, and 4 is a resistance leg portion. It is a pattern conductor for wiring on a printed circuit board (not shown). Further, in FIG. 4, 6 is the shunt resistor 3 described above.
Is a solder for fixedly connecting to the pattern conductor 4 by its resistance leg portion 3a, and 5 is an insulating substrate of the printed circuit board.
【０００３】図示の如きシャント抵抗を用いる電流測定
は、この抵抗を通過する電流Ｉm がその既知の抵抗分Ｒ
SHにおいて生成する電圧降下分ΔＶを高入力インピーダ
ンスの電流測定用回路或いは計器により測定し、Ｉm ＝
ΔＶ／ＲSH の関係から所要の電流値を求めるものであ
る。従って、前記シャント抵抗は、その抵抗分ＲSHに比
し極めて大と見做せる入力インピーダンスを有する電流
測定回路或いは電流計に対する分流器をなすものとな
る。A current measurement using a shunt resistor as shown is that the current I m passing through this resistor is its known resistance R
The voltage drop ΔV generated in SH is measured by a current measuring circuit or instrument with high input impedance, and I m =
The required current value is obtained from the relationship of ΔV / R SH . Therefore, the shunt resistor forms a shunt resistor for a current measuring circuit or an ammeter having an input impedance which can be regarded as extremely large as compared with the resistance component R SH .
【０００４】[0004]
【発明が解決しようとする課題】前記の如きシャント抵
抗による電流測定を精度良く行うためには、この抵抗を
含め、電流検出信号としての前記電圧降下信号ΔＶの取
電点間の通電経路における抵抗値が所要の電流測定精度
に応じて安定していることが必要となる。しかしなが
ら、図３の如き形状をなし図４の如くハンダ付けにより
前記配線用パターン導体にその両脚部で固定接続される
従来形のシャント抵抗においては、前記パターン導体部
からシャント抵抗電圧降下分として取り出した電圧降下
信号には、前記シャント抵抗自体の電圧降下分と共に、
前記シャント抵抗の両端脚部におけるハンダ付け接続部
の電圧降下分が含まれることになる。In order to accurately measure the current by the shunt resistance as described above, the resistance in the energizing path between the current collection points of the voltage drop signal ΔV as the current detection signal is included in order to accurately measure the current. The value must be stable according to the required current measurement accuracy. However, in the conventional shunt resistor having the shape as shown in FIG. 3 and fixedly connected to the wiring pattern conductor by its both legs by soldering as shown in FIG. 4, the shunt resistance voltage drop is taken out from the pattern conductor portion. The voltage drop signal, along with the voltage drop of the shunt resistor itself,
The voltage drop of the soldered connection portion at both ends of the shunt resistor is included.
【０００５】ここに、前記のハンダ部抵抗は、既知のも
のとなされていた前記シャント抵抗固有の抵抗分に対す
る誤差となり、且つ、ハンダ付け作業の仕上がり具合に
より或いはその通電に伴う温度変化により前記ハンダ部
抵抗を所要の電流測定精度に応じて精度良く安定化させ
ることは困難となる。因みに、図３の如き形状をなし図
４の如くプリント基板に実装されたシャント抵抗によ
り、その抵抗電圧降下による電流測定をなす場合、前記
シャント抵抗の固有の抵抗値をＲSH，その端部２箇所の
ハンダ接続部の抵抗値の和をＲL とし、測定対象電流Ｉ
m が前記シャント抵抗に通電された場合に前記パターン
導体部から取り出された電圧降下分をΔＶt とすれば、
下記の式（１）が得られる。Here, the resistance of the solder portion becomes an error with respect to the resistance component peculiar to the shunt resistance which has been known, and the solder is caused by the finish condition of the soldering work or the temperature change accompanying the energization. It is difficult to accurately stabilize the partial resistance according to the required current measurement accuracy. By the way, when the current is measured by the resistance voltage drop of the shunt resistor having the shape as shown in FIG. 3 and mounted on the printed circuit board as shown in FIG. 4, the specific resistance value of the shunt resistor is R SH , and its end 2 Let R L be the sum of the resistance values of the solder joints at the points, and measure the current I
When the voltage drop taken out from the pattern conductor portion when m is energized to the shunt resistor is ΔV t ,
The following formula (1) is obtained.
【０００６】[0006]
【数１】
ΔＶt ＝Ｉm （ＲSH＋ＲL ）
＝Ｉm ＲSH（１＋ＲL ／ＲSH） ……………（１）
即ち、所要の電圧降下分Ｉm ＲSHに対しＲL ／ＲSH 倍
の要補正分が重畳されることになり、若し、前記抵抗値
をＲL が前記電流Ｉm の大きさに依存し或いは時間的に
変動するものとなれば、前記シャント抵抗による電流測
定の精度維持は困難なものとなる。## EQU1 ## ΔV t = I m (R SH + R L ) = I m R SH (1 + R L / R SH ) ... (1) That is, R L with respect to the required voltage drop I m R SH / R SH times the main correction amount will be is superimposed, Wakashi, if assumed that the resistance value R L varies depending on the size or time-of the current I m, the shunt resistor It is difficult to maintain the accuracy of the current measurement due to.
【０００７】上記に鑑みこの発明は、前記の如き電圧降
下測定値におけるハンダ接続抵抗分の排除或いは大幅な
低減を可能とし、電流測定精度の向上を簡易且つ安価に
実現可能とするシャント抵抗の提供を目的とするもので
ある。In view of the above, the present invention provides a shunt resistor capable of eliminating or greatly reducing the solder connection resistance component in the voltage drop measurement value as described above, and improving the current measurement accuracy easily and at low cost. The purpose is.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、この発明の四端子シャント抵抗は、
１）請求項１に従い、プリント基板上に表面実装されて
電流測定用に供されるシャント抵抗であって、抵抗温度
係数の小なる帯状の抵抗体よりなり、その電流通電方向
における両端を、Ｌ字形等に折り曲げられ且つ前記の電
流通電方向にて切り込まれたスリットにより２分割され
た脚部となし、四端子形状に一体成形されたものとす
る。In order to achieve the above object, a four-terminal shunt resistor according to the present invention comprises: 1) a shunt resistor surface-mounted on a printed circuit board for current measurement according to claim 1; And a leg made of a strip-shaped resistor having a small temperature coefficient of resistance, the both ends in the current-carrying direction being bent into an L shape or the like and divided into two by slits cut in the current-carrying direction. It is assumed that it is not formed as a part and is integrally molded into a four-terminal shape.
【０００９】２）請求項２に従い、請求項１記載の四端
子シャント抵抗において、その両端部をなす前記の２分
割脚部に関し、電流通電方向に対して同一側の脚部をそ
れぞれ対となし、一対の脚部を測定対象電流の入口及び
出口用端部となし、他の一対の脚部を高入力インピーダ
ンスの電流測定回路に印加する電流検出信号の取り出し
部となすものとする。2) According to a second aspect, in the four-terminal shunt resistor according to the first aspect, with respect to the two-divided leg portions forming both ends thereof, the leg portions on the same side in the direction of current flow are paired. The pair of legs are used as an inlet and an outlet for the current to be measured, and the other pair of legs are used as a portion for extracting a current detection signal applied to a current measuring circuit having a high input impedance.
【００１０】３）請求項３に従い、請求項２記載の四端
子シャント抵抗において、前記２分割脚部を形成する前
記スリットの切り込み位置は、前記の測定対象電流通電
脚部における通電所要断面積を主体に、前記帯状抵抗体
の幅方向において適宜決定されるものとする。3) According to claim 3, in the four-terminal shunt resistance according to claim 2, the cut position of the slit forming the two-divided leg part has a required cross-sectional area of the current-carrying leg part to be measured. Mainly, it is appropriately determined in the width direction of the strip resistor.
【００１１】[0011]
【作用】前記の如き従来の電流測定においては、測定対
象電流がシャント抵抗に生成する電圧降下分として前記
パターン導体部からの取電値を用いており、このため、
前記の式（１）に示す如く、本来の電圧降下分Ｉm ＲSH
に対してＲL ／ＲSH倍の要補正分が重畳されていた。In the conventional current measurement as described above, the value of the electric current from the pattern conductor portion is used as the voltage drop generated in the shunt resistance by the current to be measured.
As shown in the above equation (1), the original voltage drop I m R SH
On the other hand, a correction amount of R L / R SH times was superimposed.
【００１２】この発明は、測定した電圧降下信号中の前
記の如き要補正分の排除或いは大幅な低減を図るもので
あって、シャント抵抗と前記パターン導体部との接続部
をなし測定対象電流が通過するシャント抵抗両端ハンダ
付け部の内側において、前記シャント抵抗上の所定の間
隔を置いた２箇所に電圧降下信号取り出し用の端子を、
前記シャント抵抗の前記パターン導体部への取り付け脚
を兼用するものとして設けるものである。The present invention is intended to eliminate or drastically reduce the above-mentioned correction required in the measured voltage drop signal, and to provide a connection between the shunt resistor and the pattern conductor portion and to measure the current to be measured. Inside the soldered parts on both ends of the passing shunt resistor, terminals for extracting a voltage drop signal are provided at two positions on the shunt resistor at predetermined intervals.
The shunt resistor is also provided as a leg for attaching the shunt resistor to the pattern conductor portion.
【００１３】ここに、前記両端子から取り出された電圧
降下信号は、高入力インピーダンスの電流測定回路或い
は電流計により計測するものとする。従って、前記両端
子と測定用回路或いは計器間に線路抵抗或いはハンダ接
続部の抵抗等が存在しても、これら抵抗値が前記の測定
用回路或いは計器の入力インピーダンスに比し事実上無
視可能なものとなる如く回路設計を行うことにより、前
記シャント抵抗上所定の間隔を置いて設けた２箇所の信
号取り出し位置間において前記測定対象電流が生成する
電圧降下分のみを正確に測定することが可能となる。Here, the voltage drop signals taken out from the both terminals are measured by a current measuring circuit having a high input impedance or an ammeter. Therefore, even if there is a line resistance or a resistance of a solder joint between the both terminals and the measuring circuit or the measuring instrument, these resistance values are practically negligible compared with the input impedance of the measuring circuit or the measuring instrument. It is possible to accurately measure only the voltage drop generated by the current to be measured between the two signal extraction positions provided at a predetermined interval on the shunt resistor by designing the circuit as it is. Becomes
【００１４】即ち、この発明は、
１）請求項１による如く、プリント基板上にハンダ付け
により表面実装される電流検出素子としてのシャント抵
抗に関し、抵抗温度係数の小なる帯状の抵抗体を用い、
その電流通電方向における両端を、Ｌ字形等に折り曲げ
られ且つ前記の電流通電方向にて切り込まれたスリット
により２分割された脚部となし、四端子形状に一体成形
するものである。That is, the present invention relates to 1) a shunt resistor as a current detecting element which is surface-mounted on a printed circuit board by soldering, using a strip-shaped resistor having a small resistance temperature coefficient,
Both ends in the current-carrying direction are bent into an L shape or the like, and are formed into two legs by slits cut in the current-carrying direction, and are integrally molded into a four-terminal shape.
【００１５】２）請求項２による如く、請求項１記載の
四端子シャント抵抗において、その両端部をなす前記の
２分割脚部に関し、電流通電方向に対して同一側の脚部
をそれぞれ対となし、一対の脚部を測定対象電流の入口
及び出口用端部となし、他の一対の脚部を高入力インピ
ーダンスの電流測定回路に印加する電流検出信号の取り
出し部となすものである。2) According to a second aspect, in the four-terminal shunt resistor according to the first aspect, with respect to the two-divided leg portions forming both ends thereof, the leg portions on the same side in the direction of current flow are respectively paired. None, the pair of legs are used as the inlet and outlet ends of the current to be measured, and the other pair of legs is used as the extraction portion of the current detection signal applied to the current measuring circuit with high input impedance.
【００１６】３）請求項３による如く、請求項２記載の
四端子シャント抵抗において、前記２分割脚部を形成す
る前記スリットの切り込み位置は、前記の測定対象電流
通電脚部における通電所要断面積を主体に前記帯状抵抗
体の幅方向において適宜決定するものである。3) According to claim 3, in the four-terminal shunt resistor according to claim 2, the slits forming the two-divided legs are cut at positions where the required current-carrying cross-sectional area of the current-carrying leg is measured. Is mainly determined in the width direction of the strip-shaped resistor.
【００１７】[0017]
【実施例】以下この発明の実施例を図１，図２両図によ
り説明する。ここに、図１はこの発明の請求項１〜請求
項３を包含する実施例を示す四端子シャント抵抗の斜視
図であり、図２は等価回路表示の四端子シャント抵抗を
含む電流測定回路の基本回路図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view of a four-terminal shunt resistor showing an embodiment including claims 1 to 3 of the present invention, and FIG. 2 shows a current measuring circuit including a four-terminal shunt resistor in an equivalent circuit display. It is a basic circuit diagram.
【００１８】先ず、図１において、１はマンガニン等そ
の抵抗温度係数の小なる帯状抵抗体よりなる四端子シャ
ント抵抗であり、電流測定部１ｃを中央とし、その電流
通電方向である長手方向の両端を、請求項１による如
く、それぞれＬ字形に折り曲げられ且つ前記の電流通電
方向にて切り込まれたスリットにより２分割された端子
兼用の抵抗脚部１ａと１ｂとなし、四端子形状に一体成
形したものである。First, in FIG. 1, reference numeral 1 denotes a four-terminal shunt resistor composed of a strip-shaped resistor having a small temperature coefficient of resistance such as manganin. The current measuring portion 1c is located at the center and both ends in the longitudinal direction, which is the direction of current flow. According to claim 1, the resistance legs 1a and 1b, which are also used as terminals, are bent into an L-shape and are divided into two by slits cut in the direction of current flow, and are integrally formed into a four-terminal shape. It was done.
【００１９】また、２ａと２ｂとは図示していないプリ
ント基板の配線用パターン導体であり、前記の抵抗脚部
１ａ及び１ｂとそれぞれ１ａ−２ａ，１ｂ−２ｂの対応
にてハンダ付けにより接続される。ここに、請求項２に
よる如く、前記１ａ−２ａの組み合わせは測定対象電流
の通電経路を形成し、１ｂ−２ｂの組み合わせは所要の
電圧降下検出信号の取り出し用端子を形成するものであ
る。Further, 2a and 2b are wiring pattern conductors of a printed circuit board (not shown), which are connected to the resistance leg portions 1a and 1b by soldering in correspondence with 1a-2a and 1b-2b, respectively. It Here, as in claim 2, the combination of 1a-2a forms a conduction path for the current to be measured, and the combination of 1b-2b forms a terminal for extracting a required voltage drop detection signal.
【００２０】更に、請求項３による如く、前記測定対象
電流の通電経路をなす抵抗脚部１ａの幅は前記電流の通
電用所要断面積に応じて決定され、また、前記の検出信
号取り出し用端子１ｂの幅は、対応する配線パターン導
体２ｂの幅或いは帯状抵抗体の一体成形加工上の制約を
考慮して決定されるものであり、前記１ａ，１ｂ両者は
前記帯状抵抗体に設けたスリットにより区分されるもの
である。Further, according to a third aspect of the present invention, the width of the resistance leg portion 1a forming the current-carrying path of the current to be measured is determined according to the required cross-sectional area for current-carrying, and the detection signal extracting terminal is provided. The width of 1b is determined in consideration of the width of the corresponding wiring pattern conductor 2b or the restrictions on the integral molding process of the strip-shaped resistor. Both 1a and 1b are defined by the slits provided in the strip-shaped resistor. It is classified.
【００２１】次に、図２に示す如く、四端子シャント抵
抗１は５組の等価抵抗の組み合わせからなるものと見做
すことができる。即ち、前記の抵抗１の中央部にあって
通電電流Ｉm の測定に供される前記電流測定部１ｃの抵
抗分ＲSHと、前記電流Ｉm の入出口両部における抵抗脚
部１ａの抵抗分ＲL11 とＲL12 と、同様に、前記抵抗脚
部１ｂの抵抗分ＲL21 とＲL22 とが、前記の抵抗分ＲSH
を中心に四方に配列された構成をなすものである。な
お、前記各脚部抵抗分ＲL11 ，ＲL12 ，ＲL21 ，ＲL22
には、前記の脚部と配線用パターン導体間ハンダ接続部
の抵抗分を含むものとする。Next, as shown in FIG. 2, the four-terminal shunt resistor 1 can be regarded as consisting of a combination of five sets of equivalent resistors. That is, the resistance component R SH of the current measuring unit 1c, which is provided in the central portion of the resistor 1 and is used for measuring the energizing current I m , and the resistance of the resistance leg 1a at both the inlet and outlet of the current I m. and minutes R L11 and R L12, likewise, the resistance component R L21 and R L22 of the resistor leg portion 1b, the resistor-R SH
It has a structure arranged in four directions centering around. In addition, the leg resistance components R L11 , R L12 , R L21 , and R L22.
Includes the resistance of the solder connection portion between the leg portion and the wiring pattern conductor.
【００２２】図示の如く、測定対象電流Ｉm が抵抗分Ｒ
SHにおいて生成する電圧降下分は、抵抗脚部１ｂの抵抗
分ＲL21 とＲL22 とを経由して取り出され電流測定回路
における高入力インピーダンスの演算増幅器７へ入力さ
れ所要の測定電流Ｉmdとして検出される。ここに、前記
抵抗分ＲSHは、四端子シャント抵抗１の形状決定と共に
固定されるものではあるがその値自体を当初から正確に
算定することは困難であり、このため、その値が既知の
電流Ｉm の通電時に前記演算増幅器７のゲイン調整等に
よる電流測定値Ｉmdの事前較正が必要となる。As shown in the figure, the current I m to be measured is the resistance R
The voltage drop generated at SH is taken out via the resistance components R L21 and R L22 of the resistance leg portion 1b, input to the high input impedance operational amplifier 7 in the current measurement circuit, and detected as the required measurement current I md. To be done. Here, although the resistance component R SH is fixed together with the determination of the shape of the four-terminal shunt resistor 1, it is difficult to accurately calculate the value itself from the beginning, and therefore, the value is known. Pre-calibration of the current measurement value I md by adjusting the gain of the operational amplifier 7 is required when the current I m is applied.
【００２３】図２の如き電流測定回路によれば、電流測
定時、測定対象電流Ｉm の通電路における抵抗分ＲSHの
電圧降下（Ｉm ・ＲSH）のみが電流測定信号として用い
られ、他部の電圧降下〔Ｉm （ＲL11 ＋ＲL12 ）〕は不
要となり、従って、これらの抵抗分ＲL11 ，ＲL12 に含
まれる抵抗脚部１ａのハンダ接続部の抵抗分の影響は排
除されることになる。According to the current measuring circuit as shown in FIG. 2, during current measurement, only the voltage drop (I m · R SH ) of the resistance component R SH in the current-carrying path of the current I m to be measured is used as the current measurement signal. The voltage drop [I m (R L11 + R L12 )] of the other part is unnecessary, and therefore the influence of the resistance component of the solder connection portion of the resistance leg portion 1 a included in these resistance components R L11 and R L12 is eliminated. It will be.
【００２４】また、前記増幅器７の入力インピーダンス
を抵抗脚部１ｂの各抵抗分ＲL21 ，ＲL22 に比して極め
て大なるものとなすことにより、前記電圧降下Ｉm ・Ｒ
SHの入力経路における前記各抵抗分ＲL21 ，ＲL22 の影
響は無視できるものとなり、従って、これら各抵抗分に
含まれる抵抗脚部１ｂのハンダ接続部の抵抗分の影響も
無視できるものとなる。Further, by making the input impedance of the amplifier 7 extremely large as compared with the resistance components R L21 and R L22 of the resistance leg portion 1b, the voltage drop I m · R
The effects of the resistances R L21 and R L22 in the input path of SH can be ignored, and therefore the effects of the resistance of the solder connection portion of the resistance leg 1b included in these resistances can also be ignored. .
【００２５】即ち、プリント基板上に実装する電流検出
素子としてのシャント抵抗を図１に示す如き一体成形の
四端子シャント抵抗となし、図２の如く電流測定回路を
構成することによって、前記シャント抵抗の各脚部にお
けるハンダ接続部の抵抗分の影響を排除或いは大幅に低
減することが可能となる。That is, the shunt resistor as the current detecting element mounted on the printed circuit board is an integrally molded four-terminal shunt resistor as shown in FIG. 1, and the shunt resistor is constructed by constructing the current measuring circuit as shown in FIG. It is possible to eliminate or significantly reduce the influence of the resistance component of the solder connection portion of each leg portion.
【００２６】[0026]
【発明の効果】この発明によれば、プリント基板上に実
装されてインバータの回路電流測定用に供されるシャン
ト抵抗に関して、その通電方向の両端を、それぞれＬ字
形等に折り曲げられ且つ同方向に切り込まれたスリット
によりそれぞれ適当な幅を以て２分割された脚部とな
し、一体成形により四端子シャント抵抗となし、また前
記の２分割脚部に関し、電流通電方向に対して同一側の
脚部をそれぞれ対となし、その一対を測定対象電流の入
口及び出口用端部となし、他の一対を電流測定回路にお
ける高入力インピーダンス演算増幅器用の入力信号取り
出し部となすことにより、前記の各脚部とプリント基板
の配線パターン導体とのハンダ接続部におけるハンダ部
抵抗の影響を排除するか或いは大幅に低減させることが
可能となり、前記のハンダ部抵抗に起因する電流測定上
の定常的誤差の発生或いは測定誤差の時間的変化等を簡
易且つ確実に防止することができ、電流測定における所
要精度の維持を図ることができる。According to the present invention, with respect to the shunt resistor mounted on the printed circuit board and used for measuring the circuit current of the inverter, both ends in the energization direction are bent in the L-shape or the like and are arranged in the same direction. With the slits cut, each leg is divided into two parts with an appropriate width, and the four-terminal shunt resistance is formed by integral molding. Also, regarding the leg parts divided into two, the leg parts on the same side with respect to the current-carrying direction. Each of the above-mentioned legs by forming an input signal take-out part for a high input impedance operational amplifier in the current measuring circuit, and forming a pair as the input and output ends of the current to be measured It becomes possible to eliminate or significantly reduce the influence of the resistance of the solder part in the solder connection part between the wiring part and the wiring pattern conductor of the printed circuit board. The temporal change of generation or measurement error of the constant error in current measurement due to Sunda section resistance can be easily and reliably prevented, it is possible to maintain the required accuracy in current measurement.
【図面の簡単な説明】[Brief description of drawings]
【図１】この発明の実施例を示すシャント抵抗の斜視図FIG. 1 is a perspective view of a shunt resistor showing an embodiment of the present invention.
【図２】等価回路表示のシャント抵抗を含む電流測定回
路の基本回路図FIG. 2 is a basic circuit diagram of a current measuring circuit including a shunt resistor showing an equivalent circuit.
【図３】従来技術の実施例を示すシャント抵抗の斜視図FIG. 3 is a perspective view of a shunt resistor showing a prior art embodiment.
【図４】図３に対応するシャント抵抗の側面図FIG. 4 is a side view of a shunt resistor corresponding to FIG.
１ 四端子シャント抵抗 １ａ，１ｂ シャント抵抗１の抵抗脚部 ２ プリント基板のパターン導体 ２ａ，２ｂ プリント基板のパターン導体 ３ 従来のシャント抵抗 ３ａ シャント抵抗３の抵抗脚部 ４ パターン導体 ５ プリント基板の絶縁基板 ６ ハンダ ７ 演算増幅器 1 4-terminal shunt resistor 1a, 1b Resistance leg of shunt resistor 1 2 Printed circuit board pattern conductor 2a, 2b Printed circuit board pattern conductor 3 Conventional shunt resistance 3a Shunt resistor 3 resistance leg 4 pattern conductor 5 Printed circuit board insulation board 6 solder 7 Operational amplifier
Claims (3)
に供されるシャント抵抗であって、抵抗温度係数の小な
る帯状の抵抗体よりなり、その電流通電方向における両
端を、Ｌ字形等に折り曲げられ且つ前記の電流通電方向
にて切り込まれたスリットにより２分割された脚部とな
し、四端子形状に一体成形されたことを特徴とする四端
子シャント抵抗。1. A shunt resistor, which is surface-mounted on a printed circuit board and is used for current measurement, comprising a strip-shaped resistor having a small temperature coefficient of resistance, and its both ends in the current-carrying direction are L-shaped or the like. A four-terminal shunt resistor, which is formed into a four-terminal shape by forming a leg portion divided into two by a slit bent and cut in the direction of current flow.
て、その両端部をなす前記の２分割脚部に関し、電流通
電方向に対して同一側の脚部をそれぞれ対となし、一対
の脚部を測定対象電流の入口及び出口用端部となし、他
の一対の脚部を高入力インピーダンスの電流測定回路に
印加する電流検出信号の取り出し部となしたことを特徴
とする四端子シャント抵抗。2. A four-terminal shunt resistor according to claim 1, wherein said two-divided legs forming both ends thereof have pairs of legs on the same side in the direction of current flow. The four-terminal shunt resistor is characterized in that an end portion for an inlet and an outlet of a current to be measured is formed, and another pair of legs serves as a portion for extracting a current detection signal applied to a current measuring circuit having a high input impedance.
て、前記２分割脚部を形成する前記スリットの切り込み
位置は、前記の測定対象電流通電脚部における通電所要
断面積を主体に、前記帯状抵抗体の幅方向において適宜
決定されることを特徴とする四端子シャント抵抗。3. The four-terminal shunt resistor according to claim 2, wherein the slits forming the two-divided leg portions are formed in the strip shape mainly based on the required cross-sectional area of the current-carrying current-carrying leg portion. A four-terminal shunt resistor, which is appropriately determined in the width direction of the resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24664594A JP3379240B2 (en) | 1994-10-13 | 1994-10-13 | Four-terminal shunt resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24664594A JP3379240B2 (en) | 1994-10-13 | 1994-10-13 | Four-terminal shunt resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08115802A JPH08115802A (en) | 1996-05-07 |
| JP3379240B2 true JP3379240B2 (en) | 2003-02-24 |
Family
ID=17151499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24664594A Expired - Fee Related JP3379240B2 (en) | 1994-10-13 | 1994-10-13 | Four-terminal shunt resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3379240B2 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6774759B2 (en) * | 2001-05-18 | 2004-08-10 | Marconi Intellectual Property (Ringfence), Inc. | Combined fuse holder and current monitor |
| DE20117650U1 (en) * | 2001-10-29 | 2003-03-13 | Heusler Isabellenhuette | Surface mount electrical resistance |
| JP4236909B2 (en) * | 2002-11-13 | 2009-03-11 | 三菱電機株式会社 | Power semiconductor module |
| JP4029049B2 (en) * | 2003-01-10 | 2008-01-09 | 三菱電機株式会社 | Current detection resistor |
| CN1319078C (en) * | 2003-07-09 | 2007-05-30 | 彭德龙 | Precision shunt resistor and manufacturing method thereof |
| JP2007078599A (en) * | 2005-09-16 | 2007-03-29 | Hitachi Ltd | Resistor for current detection and controller |
| JP2008039571A (en) | 2006-08-04 | 2008-02-21 | Denso Corp | Current sensor |
| DE102006039722A1 (en) * | 2006-08-24 | 2008-02-28 | Conti Temic Microelectronic Gmbh | Electrical component, in particular measuring resistor and method for producing such an electrical component |
| JP2008275418A (en) * | 2007-04-27 | 2008-11-13 | Omron Corp | Wiring board and electric current detector |
| US8031043B2 (en) | 2008-01-08 | 2011-10-04 | Infineon Technologies Ag | Arrangement comprising a shunt resistor and method for producing an arrangement comprising a shunt resistor |
| JP5648197B2 (en) * | 2008-09-18 | 2015-01-07 | 正明 貫洞 | Current shunt |
| JP5445193B2 (en) * | 2010-02-09 | 2014-03-19 | パナソニック株式会社 | Resistor, mounting method of resistor, measuring method of resistor |
| JP5545334B2 (en) * | 2012-09-13 | 2014-07-09 | ダイキン工業株式会社 | Electronic circuit equipment |
| KR101381420B1 (en) * | 2013-05-14 | 2014-04-04 | (주)에이치엔티 | Board mount type shunt |
-
1994
- 1994-10-13 JP JP24664594A patent/JP3379240B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08115802A (en) | 1996-05-07 |
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