Fast Flux Maps Computation of Synchronous Reluctance Machines With and Without Permanent Magnets Assistance

Gianvito Gallicchio, Mauro Di Nardo, Francesco Cupertino, Vasyl Varvolik, Giampaolo Buticchi, Michele Degano, Chris Gerada

    Research output: Journal PublicationArticlepeer-review


    This paper proposes a computational efficient and accurate hybrid analytical-finite element (FE) performance prediction methodology for synchronous reluctance (SyR) machines. The hybrid procedure consists in solving the d- and q-axis magnetic equivalent circuits in a non-linear fashion so to consider the saturation effects of both stator and rotor iron parts. The cross-coupling effects are taken into account by adjusting the analytical flux maps with the results obtained FE-simulating few operating points in the d-q current plane. The proposed approach allows to obtain an excellent estimation of the direct and quadrature axis fluxes for a wide range of operating conditions including the overload ones with a negligible computational effort when compared to a full FE analysis. The estimation accuracy has been assessed analysing a wide spectrum of SyR machine geometries featuring different stator slots and flux barriers combinations including a PM-assisted variant. A sensitivity analysis shows the trade-off between estimation accuracy and computational time while leveraging on the discretization of the airgap equivalent magnetic circuit. The proposed fast performance estimation method is finally validated against the experimental measurements carried out on a SyR machine prototype.

    Original languageEnglish
    Pages (from-to)1-11
    Number of pages11
    JournalIEEE Transactions on Industry Applications
    Publication statusAccepted/In press - 2024


    • Cross coupling
    • Estimation
    • finite element analysis
    • flux map
    • Geometry
    • interior permanent magnet
    • Magnetic circuits
    • magnetic equivalent circuit
    • Magnetic flux
    • magnetic model
    • permanent magnet assisted
    • Rotors
    • saturation
    • Saturation magnetization
    • Stators
    • synchronous reluctance machine

    ASJC Scopus subject areas

    • Control and Systems Engineering
    • Industrial and Manufacturing Engineering
    • Electrical and Electronic Engineering


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