Research on torque ripple suppression method of high-speed permanent magnet synchronous generator based on single-phase correction winding

To address the torque ripple and consequent vibration induced by inter-turn shortcircuit(ITSC) faults in high-speed permanent magnet synchronous generators (HSPMSGs),an HSPMSG incorporating a single-phase correction winding configuration is employed fortorque ripple suppression. This particular winding configuration enables effective mitigationof the torque ripple caused by ITSC faults. An analytical magnetomotive force (MMF)model under ITSC fault conditions is established based on the winding topology of a backwoundHSPMSG. Through this model, the critical parameters that govern torque ripple areidentified, and torque ripple together with vibration characteristics under ITSC faults are3experimentally measured on a prototype. Subsequently, a dedicated suppression method fortorque ripple is proposed after detailed examination of the ripple components arising fromthe fault, and the optimal suppression strategy is derived accordingly. Finite element analysisis performed to compare torque ripple and vibration performance before and after theintroduction of the correction winding. Results confirm that, upon the occurrence of an ITSCfault, the proposed configuration can effectively suppress torque ripple and significantlyreduce vibration levels in the generator.