FAULT DETECTING APPARATUS AND COMPUTER PROGRAM THEREFOR

摘要

A fault detecting apparatus, to use an output current from a drive circuit as a current value detected by a current sensor, calculates a duty ratio of a control signal to be supplied to the drive circuit to define the duty ratio as a theoretical value of the duty ratio of the control signal. The fault detecting apparatus compares a duty ratio of a control signal actually supplied to the drive circuit with the theoretical value of the duty ratio of the control signal to determine whether the current sensor (fails on the basis of a comparison result.

主权项

1. A fault detecting apparatus for a current detecting circuit that detects a current changing depending on an on/off operation of a switch element, comprising:
a switching control unit that supplies a control signal to the switch element to on/off-control the switch element; a comparing unit that compares a duty ratio of the control signal supplied from the switching control unit to the switch element with a theoretical value of the duty ratio of the control signal; and a fault detecting unit that detects a failure of the current detecting circuit on the basis of a comparison result obtained by the comparing unit, wherein the comparing unit that, to use the current changing depending on the on/off operation of the switch element as a current value detected by the current detecting circuit, calculates a duty ratio of a control signal to be supplied to the switch element to define the duty ratio as the theoretical value of the duty ratio of the control signal.