To provide an electric leakage detection circuit for detecting a decrease in resistance value of an insulating resistor between the ground line of a DC power supply mounted in a vehicle and the body earth of the vehicle, with which a fault of the electric leakage detection circuit is determined by itself.SOLUTION: A electric leakage detection circuit 1 refers to information D1 when an insulating resistor Ri and a dummy insulating resistor Ri' are not connected in parallel to each other and defines a resistance value that corresponds to the peak value Vd of the voltage acting on a detection resistor Rd as a fault determining resistance value, refers to information D1 and defines a peak value that corresponds to the synthesized resistance value of the fault determining resistance value and the dummy insulating resistor Ri' as a fault determining peak value, and determines that the electric leakage detection circuit 1 is faulty when the peak value Vd of the voltage acting on the detection resistor Rd differs from the fault determining peak value while the insulating resistor Ri and the dummy insulating resistor Ri' are connected in parallel to each other.SELECTED DRAWING: Figure 1

    【課題】車両に搭載される直流電源のグランドラインと車両のボディアースとの間の絶縁抵抗の抵抗値の低下を検知する漏電検知回路の故障を漏電検知回路自身で判定する。【解決手段】絶縁抵抗Riと模擬絶縁抵抗Ri´とが互いに並列接続されていないとき、情報D1を参照して、検出抵抗Rdにかかる電圧の波高値Vdに対応する抵抗値を故障判定用抵抗値とし、情報D1を参照して、故障判定用抵抗値と模擬絶縁抵抗Ri´の抵抗値との合成抵抗値に対応する波高値を故障判定用波高値とし、絶縁抵抗Riと模擬絶縁抵抗Ri´とが互いに並列接続されているとき、検出抵抗Rdにかかる電圧の波高値Vdが故障判定用波高値と異なる場合、漏電検知回路1が故障していると判定する。【選択図】図1


    Access

    Download


    Export, share and cite



    Title :

    ELECTRIC LEAKAGE DETECTION CIRCUIT


    Additional title:

    漏電検知回路


    Contributors:

    Publication date :

    2020-10-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



    ELECTRIC LEAKAGE DETECTION CIRCUIT

    KATO HIROAKI / YAMAMOTO SATOSHI / ITO TOMOYUKI et al. | European Patent Office | 2021

    Free access

    ELECTRIC LEAKAGE DETECTION CIRCUIT AND METHOD FOR DETECTING LEAKAGE

    ODAGIRI TOSHIO / SUZUKI MASAAKI / HIROSE SHINJI et al. | European Patent Office | 2020

    Free access

    ELECTRIC LEAKAGE DETECTION CIRCUIT OF VEHICLE

    KAMATA TAKAYUKI | European Patent Office | 2015

    Free access

    ELECTRIC LEAKAGE DETECTION APPARATUS AND ELECTRIC LEAKAGE DETECTION METHOD

    MURAKAMI MANABU / OOSAWA TAKESHI / YAMAUCHI NOBUYUKI et al. | European Patent Office | 2019

    Free access