Method and apparatus for diagnosing phase current sensor faults in a system for controlling a synchronous rotating electrical machine of a motor vehicle

摘要

The method according to the invention enables the diagnosis (15, 16) of phase current sensor defects in a system for controlling a synchronous rotating electrical machine of a motor vehicle. According to the present invention, the method takes into account the difference between the measured value provided by the sensor (14) and the nominal value of the phase current (ia, ib, ic) to diagnose the fault. The difference is calculated (18) in the rotating park reference coordinate system (17) and is separate from the electromechanical model of the machine. The method detects a sensor defect if the difference is substantially non-zero (19), and detects an offset sensor defect if the residual pulsation (ωres) of the difference is approximately equal to the measured speed (w) of the control system. To detect.