ELECTRIC CURRENT DETECTION DEVICE AND ELECTRIC CURRENT DETECTION METHOD

An electric current detection device (100) that comprises: a shunt resistor (1) connected in series to a path along which electric current flows; a first circuit (2) that converts the voltage at both ends of the shunt resistor (1) to a prescribed differential voltage; a second circuit (3) to which t...

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Bibliographic Details
Main Authors YAMASHITA, Masanori, TAKIGASHIRA, Naoki, MATSUDA, Kouichi
Format Patent
LanguageEnglish
French
Japanese
Published 02.12.2021
Subjects
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Summary:An electric current detection device (100) that comprises: a shunt resistor (1) connected in series to a path along which electric current flows; a first circuit (2) that converts the voltage at both ends of the shunt resistor (1) to a prescribed differential voltage; a second circuit (3) to which the prescribed differential voltage is input from the first circuit (2) via a wiring pair (55) and which amplifies the prescribed differential voltage; a constant current circuit (4) connected between the wiring pair (55); and a calculation circuit (5) that calculates the electric current flowing through the path, on the basis of the voltage amplified by the second circuit (3). L'invention concerne un dispositif de détection de courant électrique (100) comprenant : une résistance de shuntage (1) connectée en série à un trajet le long duquel circule un courant électrique ; un premier circuit (2) qui convertit la tension aux deux extrémités de la résistance de shuntage (1) vers une tension différentielle prescrite ; un second circuit (3) vers lequel la tension différentielle prescrite est entrée à partir du premier circuit (2) par l'intermédiaire d'une paire de câblage (55) et qui amplifie la tension différentielle prescrite ; un circuit à courant constant (4) connecté entre la paire de câblage (55) ; et un circuit de calcul (5) qui calcule le courant électrique circulant dans le trajet, en fonction de la tension amplifiée par le second circuit (3). 電流が流れる経路に直列接続されるシャント抵抗(1)と、シャント抵抗(1)の 両端電圧を所定の差動電圧に変換する第1回路(2)と、第1回路(2)から一対の 配線(55)を介して所定の差動電圧が入力され、所定の差動電圧を増幅する第2回 路(3)と、一対の配線(55)の間に接続される定電流回路(4)と、第2回路( 3)により増幅された電圧に基づいて、経路に流れる電流を演算する演算回路(5) とを備える電流検出装置(100)。
Bibliography:Application Number: WO2020IB00514