PDC-Based Hybrid Flux Observer with Flux Error Estimation for Sensorless SPMSM Drives

Inhalt:
Parameter mismatch is a major cause of severe position estimation errors in sensorless surface permanent magnet synchronous motor (SPMSM) drives. This article proposes a parallel disturbance controller (PDC)-based hybrid flux observer (HFO) with flux error estimation to enhance robustness against parameter mismatch. The PDC estimates the flux error caused by parameter variations in the current model and compensates for it via a feedback loop, improving rotor position accuracy. Finally, experiments on a 750W SPMSM drive platform validate the effectiveness of the proposed method.