Influence of pole number and stator outer diameter on volume, weight and cost of superconducting generator with iron-cored rotor topology for wind turbines.

This paper investigates the influence of pole number and stator outer diameter on the performance of superconducting (SC) generators. The SC generator has an iron-cored rotor topology. Firstly, the generator structure is introduced and the optimization procedure is described. Then the influence of design parameters on performance, in terms of generator volume, weight, SC wire utilization, and active material cost, etc., is presented. Some relationships for the optimal combinations for different performance attributes are established. In addition, the influence of SC material price on the determination of optimal stator outer diameter and pole number is discussed. Finally, the influence of SC coil area per pole on performance is also investigated