The development of an electromagnetic analytical design tool for megawatt-scale YASA generators

This paper presents the development of an analytical design tool for a megawatt-scale Yokeless And Segmented Armature (YASA) generator. This tool optimises the design of the machine to meet the user requirements, using least possible amount of active materials. The results of the analytical method are compared with those achieved by hand optimisation and on an existing 12 cores 10 poles YASA prototype machine to evaluate its validity. To investigate the feasibility of the YASA machine on wind turbine applications, the optimisation results of the YASA machine are compared with the RFPM machines and the AFPM machines under low power range (1 kW to 100 kW) and high power range (1 MW to 10MW).