Design and analysis of outer-rotor permanent magnet synchronous machine with amorphous stator core

An outer-rotor permanent magnet (PM) synchronous machine (OR-PMSM) with amorphous stator core (OR-PMSMASC) is proposed in this paper, which exhibits higher efficiency than conventional silicon steel PM machines. On the basis of the electromagnetic characteristics of the amorphous alloy material (AAM), the general design of the proposed machine is studied, including the structure parameters and the stator-slot/rotor-pole combination. The combination principle of permanent magnets and winding turns for OR-PMSMASC is investigated. Based on the 2-D finite element analysis (FEA), the electromagnetic performances of the proposed machine are analyzed and compared with an OR-PMSM with silicon steel stator (OR-PMSMSSS). A prototype of the OR-PMSMASC is manufactured and tested to validate the FEA results.