Detailed Electromagnetic Analysis of a High Specific Power Slotless Permanent Magnet Motor with Imbalanced Armature Windings

As a result of stronger demand for improved fuel efficiency, environmental concerns, and emissions, there is a growing trend to substitute turbo-electric propulsion technologies for conventional jet fuel engines in aircraft application. This paper presents a detailed electromagnetic analysis of high specific power permanent magnet(PM) motors for aircraft propulsion applications. The high-pole count surface mounted permanent magnet synchronous machine(SPMSM) with slotless/Halbach array and air-cored highspeed machine is proposed and analyzed. In particular, the influence of imbalanced armature windings on machine performances are presented by finite element analysis(FEA). It will be shown that the proposed analysis strategy is very effective for the prediction of machine performance in special purpose electric machines.