Magnetic Pole Equivalence and Performance Analyses of Multi-Layer Flux-Barrier Combined-Pole Permanent-Magnet Synchronous Machines Used for Electric Vehicles

Multi-layer flux-barrier combined-pole permanent-magnet synchronous machines (MLFB-CP-PMSMs) are especially suitable for used in electrical vehicles (EVs), as they represent a tradeoff between electromagnetic performance and the consumption of high-priced rare-earth permanent magnets (PM). In this paper, magnetic pole equivalence analyses MLFB-CP-PMSM investigated. Firstly, three types PM arrangements combined poles introduced, namely, parallel, series series–parallel. Then, circuit model principle MLFB-CP-PMSMs with different analyzed. After that, accuracy method is studied by comparing machine before after equivalence. Finally, MLFB-CP-PMSM’s performance, including loss, efficiency torque, The results prove that has advantage high efficiency, can retain precision when armature reaction degree varies.