Slotless motor is a suitable propulsion component candidate for high-speed aerospace applications due to their lightweight, low iron losses, and superior efficiency at high fundamental operating frequencies. The winding insulation design of the slotless machines requires special attention to ensure partial discharge (PD)-free operation due to the lower pressure levels at higher altitudes in aerospace applications. Finite-element analysis (FEA)-based simulations revealed that the maximum electric field strength is impacted by the separation distance between the random wound magnet wire conductors, thereby increasing the risk for PD in a low-pressure environment. Encapsulating the winding with high-strength dielectric material ensures reliable insulation, enhances manufacturing robustness, and improves thermal conductivity. The effect of potting thickness, defects in the potting, and relative permittivity of insulation have been analyzed using finite-element (FE) methods. The PD inception at reduced pressures was experimentally analyzed and corroborated with FEA using several samples of encapsulated coils.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Partial Discharge Free Insulation Design for Slotless Machines With Magnet Wire Conductors and Winding Encapsulation for Aerospace Applications


    Contributors:


    Publication date :

    2025-02-01


    Size :

    3942117 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English