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A general approach to the design of high performance ferrite-assisted synchronous reluctance motors is presented. Reference is made to a rectified rotor structure, with multiple flux barriers, designed to optimize the performance and the exploitation of the PM material. The key design issue of de-magnetization is analytically investigated, pointing out the maximum allowed current loading, depending...
A closed-form, per-unit formulation is proposed, for the design of surface mounted permanent magnet motors with high number of poles. The model evaluates the shear stress, the power factor and the specific Joule loss as the indicators of the machine performance, and demonstrates that this is determined by the correct choice of a very limited set of key-geometrical parameters. The design criteria are...
The paper presents the design issues to implement a permanent magnet (PM) amount reduction at given motor performance for a wide speed range IPM-PMASR (Permanent Magnet Assisted Synchronous Reluctance) electric machine. The paper firstly describes the design procedure followed to obtain a first limited minimum PM amount adopting magnets whose dimensions are linked to the flux barrier shape of the...
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