Fault detecting device for load driver system has load condition anomaly detection mechanism to determine anomaly in load driver system according to terminal voltage on at least one load terminal

摘要

A driver mechanism (2a) of an upper arm is attached between a positive electrode of a DC power source (10) and an end of a load (11). The driver mechanism (2b) of a lower arm is attached between a negative electrode of the DC power source and the other end of the load. A resistor (3a, 3b) is connected parallel to each driver mechanism. A load condition anomaly detection mechanism (4) determines an anomaly e.g. short circuit in the load driver system based on the terminal voltage on one or both load terminals.