Effect of rotor pole-shoe construction on losses of inverter-fed synchronous motors

Paavo Rasilo, Anouar Belahcen, Antero Arkkio

    Research output: Contribution to journalArticleScientificpeer-review

    8 Citations (Scopus)

    Abstract

    The effect of rotor pole-shoe construction on the electromagnetic losses of a 12.5-MW frequency-converter-fed wound-field synchronous motor is studied by numerical simulations. The simulations are done with the finite-element method including a dynamic model for the eddy-current, hysteresis, and excess losses in the core laminations. In the machine under examination, a reduction of 6.8% in the rated-load total electromagnetic losses was achieved merely by modifying the rotor pole-shoe shape and the damper-winding slots. Furthermore, a 15.4% reduction was achieved by removing the damper winding and changing the rotor lamination material to a 0.5-mm Fe-Si sheet instead of the original 2-mm steel sheet. Calorimetric measurements with a 150-kVA generator confirm the significant effect of the rotor lamination material under frequency-converter supply.

    Original languageEnglish
    Pages (from-to)208-217
    Number of pages10
    JournalIEEE Transactions on Industry Applications
    Volume50
    Issue number1
    DOIs
    Publication statusPublished - Jan 2014
    Publication typeA1 Journal article-refereed

    Keywords

    • Finite-element (FE) methods
    • loss measurement
    • magnetic losses
    • synchronous motors
    • variable-speed drives (VSDs)

    ASJC Scopus subject areas

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

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