Ground fault detection device

Ground fault detection device

The purpose of the present invention is to prevent the detection accuracy of an insulation resistor from being reduced due to the influence of a Y capacitor without increasing detection time and cost. This object is achieved by a ground fault detection device (100) comprising: a detection capacitor...

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Hauptverfasser: MOCHIZUKI YASUYUKI, YOSHIDA HARUHIKO, SUDO YOSHIO
Format: Patent
Sprache:chi ; eng
Schlagworte:
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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creator MOCHIZUKI YASUYUKI
YOSHIDA HARUHIKO
SUDO YOSHIO
description The purpose of the present invention is to prevent the detection accuracy of an insulation resistor from being reduced due to the influence of a Y capacitor without increasing detection time and cost. This object is achieved by a ground fault detection device (100) comprising: a detection capacitor (C1); a switch group (S1-S4) for switching between a first charging path connecting the battery (300) and the detection capacitor, a second charging path connecting the battery, the negative-side insulation resistor (RLn) and the detection capacitor, a third charging path connecting the battery, the positive-side insulation resistor (RLp) and the detection capacitor, and a measurement path for measuring the charging voltage of the detection capacitor; and a controller (110) configured to calculate an insulation resistance based on a charging voltage measurement of the detection capacitor present after charging of each charging path, in which, after measuring a charging voltage of the second charging path, the contr
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subjects MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title Ground fault detection device
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