In the permanent-magnet synchronous machines (PMSMs), the temperature of the permanent magnets (PMs) is hard to estimate, because the heat transfer involving the rotor includes speed-dependent heat convection processes. This article presents Duhamel’s integral thermal model for estimating the PM temperature of a water-cooled PMSM. In the present model, the PM temperature transient under highly varying driving cycles is presented as the superposition of the responses to all the major unit-step excitations. The accurate response of the PM temperature to each unit-step excitation can be directly obtained by numerical simulations of the corresponding auxiliary problem with the aid of a high-fidelity computational fluid dynamics (CFDs) model of the PMSM. The present PM temperature estimation model features a universal functional formula, of which the parameterization procedure does not involve the solution nonuniqueness of an inverse identification method. Therefore, it can be easily parameterized for the common radial-flux water-cooled PMSMs.


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    Title :

    Estimation of Magnet Temperature for Synchronous Motors via Duhamel’s Integral Thermal Model


    Contributors:
    Qian, Zhe (author) / Sun, Zehui (author) / Wang, Qunjing (author) / Chen, Qixu (author) / Li, Guoli (author) / Deng, Wenzhe (author)


    Publication date :

    2024-09-01


    Size :

    3716902 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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