GROUND FAULT COUNTERMEASURE DEVICE OF ONBOARD ELECTRICAL EQUIPMENT SYSTEM

摘要

PROBLEM TO BE SOLVED: To enable controlling of power consumption of a power supply voltage output circuit even if a ground fault of the power supply cable that supplies the power supply voltage from the supply voltage output circuit to a sensor, and to make a compact and low cost power supply voltage output circuit feasible consequently.;SOLUTION: A control device 3 of an onboard electrical equipment system 1 includes: a ground fault generation monitoring means 35 that determines the presence of the occurrence of the ground fault of power supply cable 23 based on the pairs of the detection signal of sensor 5a-5c; and a power supply output control means 37 that controls the supply voltage output circuit 7 that outputs the power supply voltage for operation of the sensor 5a-5c through the power supply cable 23. The power supply output control means 37, when the ground fault for the power supply of cable 23 occurs, executes control processing to periodically repeat stop of output from the power supply voltage output circuit 7 and the resume following the stop, and when the ground fault cancels then continues the output from the supply voltage output circuit 7.;COPYRIGHT: (C)2012,JPO&INPIT