ELECTRONIC CONTROL DEVICE HAVING POWER SUPPLY VOLTAGE MONITORING FUNCTION AND VEHICLE STEERING CONTROL DEVICE EQUIPPED WITH SAME

摘要

A vehicle steering control device comprises: a power supply unit (101) for supplying power to a microcontroller (102); an inverter (104) for supplying power for driving a motor (5); a gate driver (103) for controlling the inverter (104); a motor relay (105) for opening and closing the conductive path between the inverter (104) and the motor (5); a motor relay driver (106) for controlling the motor relay (105); a monitoring control unit-A (108a) for monitoring the power supply voltage of the power supply unit (101); and a monitoring control unit-B (108b). By preparing the multiple monitoring control units, even if a failure occurs in one of the monitoring control units, when the power supply voltage deviates from the normal operating range, it is possible to quickly and reliably stop the motor (5).