Article ID: 25000507
The occurrence of open-phase faults in five-phase permanent magnet synchronous motors (5Ph-PMSMs) disrupts the current balance among the remaining healthy phases, resulting in the introduction of second and fourth harmonics into the position estimation. To address this challenge, this paper proposes an innovative sensorless control approach specifically for open-phase 5Ph-PMSM systems. This methodology integrates improved second-order generalized integrators (ISOGIs) to effectively mitigate undesirable harmonics and extract the positive sequence component from the distorted back electromotive force (back-EMF). Additionally, an adaptive neutral-voltage compensator is implemented to alleviate the asymmetry present in the back-EMF, thereby further enhancing the precision of the sensorless control. The effectiveness of the proposed methodology is corroborated through rigorous experimental results.
