Parameters and performance analysis of a dual stator composite rotor axial flux induction motor by an analytical method

This study proposes a novel dual stator composite rotor axial flux induction motor (DSCRAFIM) whose solid rotor is coated with copper layers. A novel multi-slice and multi-layer method is developed and applied to analyse the three-dimensional electromagnetic field distribution in DSCRAFIM. In the application of this analytical method, DSCRAFIM is equivalent to a finite set of equal-width and increasing-length double primary composite secondary linear induction motors, whose steel secondary is divided into a finite set of equal-height layers. The surface impedance theory is applied to derive the improved equivalent circuit model (IECM) of DSCRAFIM, which considers the coupling relationship between dual stator windings. The accuracy of this IECM is then verified by both finite-element analysis and experimental test.