Performance evaluation of an axial flux consequent pole PM motor using finite element analysis

Performance evaluation of an axial flux surface mounted permanent magnet (PM) field controlled TORUS type (FCT) disc machine is presented in this paper. This new machine is an axial flux configuration with true field weakening capability since the flux is controlled by the DC field winding rather than opposing the magnets. Structure and operating principles are summarized in the first section. Next, 3D Finite Element Analysis (FEA) including no-load and on-load characteristics and back EMF variation for various armature currents and DC field current are explored. Furthermore, torque characteristics of the FCT machine for different field currents are explored. Minimization of cogging torque calculations and the effect of skewing the magnets are also examined.