The Influence of the Uncertainty of Flux-Bridge Width and BH-curve on Synchronous Reluctance Machines Performance

The performance of synchronous reluctance machines (SynRMs), including torque density, power factor and efficiency, strongly depend on rotor saliency. However, two common uncertainty factors, namely manufacturing tolerance on the flux-bridge width and the BH-curve, may considerably affect rotor saliency. In this paper, a comprehensive sensitivity analysis based on 2D FEA, regarding these two uncertainty factors is carried out, considering in particular a SynRM prototype machine of 6kW with 3000rpm rated speed. The analysis results show that the influence of the manufacturing tolerance on flux-bridge width is negligible, but the impact of stator core magnetic permeability is obvious and considerable for the design of higher performance SynRMs.