In this article, a temperature estimation for rotor permanent magnets (PMs) of PM synchronous machines (PMSMs) with integer-slot winding is proposed, which is based on the extraction of first-order slot harmonic (FOSH) in back electromotive force (EMF). It is based on the fact that due to the FOSH of back EMF, the integer-slot PMSM with slot/pole number ratio of $\nu $ usually has nonnegligible ( $2\nu ~\pm $ 1)th harmonics, of which the $q$ -axis (quadrature-axis) component is found to be a good indicator for monitoring the rotor PM temperature and can be easily extracted by a synchronous filter. Besides, the frequency of FOSH in the $q$ -axis, being ( $2\nu $ )th harmonic, is usually much higher than the sixth harmonic voltage generated by inverter nonlinearity. Thus, the extraction of FOSH can be irrespective of the influence of inverter nonlinearity in theory. The proposed method is experimentally verified on two prototype PMSMs with $v$ = 9 and 6, respectively. It is found that under different speeds and load conditions, the maximum errors in temperature estimation of rotor PMs are within the range of ±(3 °C–4 °C).


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    Titel :

    Estimation of Magnet Temperature for Integer-Slot Permanent Magnet Synchronous Machines via Extraction of First-Order Slot Harmonic in Back EMF


    Beteiligte:
    Wen, Bisheng (Autor:in) / Liu, Kan (Autor:in) / Zhu, Zi-Qiang (Autor:in) / Ding, Rongjun (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.09.2024


    Format / Umfang :

    2559982 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch