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

Abstract

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 for
torque ripple suppression. This particular winding configuration enables effective mitigation
of 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 backwound
HSPMSG. Through this model, the critical parameters that govern torque ripple are
identified, and torque ripple together with vibration characteristics under ITSC faults are3
experimentally measured on a prototype. Subsequently, a dedicated suppression method for
torque ripple is proposed after detailed examination of the ripple components arising from
the fault, and the optimal suppression strategy is derived accordingly. Finite element analysis
is performed to compare torque ripple and vibration performance before and after the
introduction of the correction winding. Results confirm that, upon the occurrence of an ITSC
fault, the proposed configuration can effectively suppress torque ripple and significantly
reduce vibration levels in the generator.