FAIL-SAFE MANAGEMENT METHOD OF A MOTOR DRIVEN POWER STEERING SYSTEM CAPABLE OF JUDGING THE MALFUNCTION OF A MOTOR DRIVEN POWER STEERING SYSTEM BY MONITORING PHASE VOLTAGE

摘要

PURPOSE: A fail-safe management method of a motor driven power steering system is provided to judge a phase voltage error quickly and to remove monitoring errors caused by a sudden change in a current by monitoring phase voltage of battery voltage and ground voltage. ;CONSTITUTION: A fail-safe management method of a motor driven power steering system comprises the steps of: applying a control signal from an electronic controller to plural transistors to control the operation of plural transistors to apply an ideal steering current to a steering motor according to the rotating angle of a steering motor(S2); and monitoring phase voltage applied to each coil of the steering motor(S4).;COPYRIGHT KIPO 2011