Diagnosis And Monitoring Of The PMSM Using The Analytical Model Method

The paper applies the diagnosis method based on the analytic model by investigating the output waveforms of the currents, torque and speed specific to a PMSM driving system. Several faults are simulated: open phase, entire phase short circuit in two situations (with and without current measurement, short circuit before and after current sensor respectively) and current sensor fault (no reaction). Thanks to the described model, the method based on analytic models can be applied and the system behavior can be compared with the results of the mathematical model which reproduces the system in normal operation. For all types of faults, more or less important oscillations of the currents and output torque are noticed. The consequences are corresponding, more or less severe and can lead to major damages.