Title :
Multi-disc axial flux stratospheric aircraft propeller drive
Author :
Hill-Cottingham, R.J. ; Coles, P.C. ; Eastham, J.F. ; Profumo, F. ; Tenconi, A. ; Gianolio, G.
Author_Institution :
Enigma TEC Ltd., Bath, UK
Abstract :
The stratospheric unmanned aircraft for the proposed European Union Helinet telecommunications infrastructure will use inverter/brushless AC motor drives for the propellers. One form of machine being considered is of multi-disc axial flux slotless construction. This has no iron losses due to the fundamental field but, since the windings are in the air-gaps, eddy current losses are present in the strands of the coil conductors. These losses are calculated, using a finely meshed finite element model and a time-stepped approach. The winding factors of the three types of winding without coil end-region overlaps are determined. Design comparisons are drawn between axial flux and conventional radial flux designs.
Keywords :
AC motor drives; aerospace propulsion; air gaps; aircraft; brushless machines; eddy current losses; finite element analysis; invertors; machine windings; European Union Helinet telecommunications infrastructure; air-gaps; coil conductor strands; eddy current losses; inverter/brushless AC motor drives; meshed finite element model; multi-disc axial flux propeller drive; multi-disc axial flux slotless machine; radial flux design; stratospheric aircraft propeller drive; stratospheric unmanned aircraft; time-stepped approach; winding factors; AC motors; Air gaps; Aircraft manufacture; Aircraft propulsion; Coils; Eddy currents; Inverters; Iron; Propellers; Unmanned aerial vehicles;
Conference_Titel :
Industry Applications Conference, 2001. Thirty-Sixth IAS Annual Meeting. Conference Record of the 2001 IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-7114-3
DOI :
10.1109/IAS.2001.955753
