Partial Discharge Analysis and Insulation Design of High Speed Slotless Machine for Aerospace Applications

Slotless motor is a suitable propulsion component candidate for high speed aerospace applications due to their light Rotor Support weight, low iron losses and superior efficiency at higher speeds (high frequency) of operation. However, insulation design for Halbach Array the winding, non-magnetic teeth and the surrounding regions Stator Windings for a slotless machine require added attention during the design process due to the low pressure and high altitudes associated with aerospace applications. This paper presents the analysis and Winding Support insulation design of a slotless motor with random wound magnet Stator Lamination wire conductors for a low pressure environment. The effect of potting thickness, air bubbles in the potting, relative permittivity of insulation, and slew rate on insulation design is analyzed using finite element methods.