Detección y diagnóstico de problemas de desmagnetización y desbalance mecánico en máquinas síncronas de imanes permanentes

A new strategy for the detection and isolation of asymmetric demagnetization and mechanical imbalance problems in permanent magnet synchronous generators operating at steady-state is proposed in this paper. The strategy is based on measuring the voltage at the midpoint of the phase windings. Particularly, the presence of demagnetization faults is reflected in the midpoint voltage spectrum frequency as sidebands around the fundamental component. On the other hand, in the case of mechanical imbalance faults, these sidebands will be reflected in both, thus allowing the detection and separation from the type of fault present, as well as quantify each.