Sensitivity Analysis Based NVH Performance Evaluation in Permanent Magnet Synchronous Machines using Lumped Unit Force Response

Noise, vibration, and harshness (NVH) in electric machines are mainly of electromagnetic and structural origin. This research focuses on isolating the structural and electromagnetic impacts on NVH performance, in a fractional slot concentrated winding (FSCW) permanent magnet synchronous machine (PMSM), brought by variation of different design parameters. A modification to the unit force response method is proposed for easier implementation in this work and is termed as lumped unit force response method. The modified method is experimentally verified before subsequent application for sensitivity analysis of various design parameters on NVH performance of a 12-slot/10-pole (12s10p) surface mounted PMSM. Separation of electromagnetic and structural impacts of different design parameters aids decision making during NVH performance optimization. Taguchi orthogonal array based mean and variance analysis are used during the sensitivity analysis in this work.