| Abstract |
In this paper, the design of an integrated modular motor drive topology based on the circumscribing polygonof the outer surface of the conventional cylindrical housing is introduced from the mechanical andthe thermal point of view. The design of the shared machine and converter cooling system is optimizedfrom the thermal point of view using computational fluid dynamics (CFD) simulations. A wide bandgap,specifically Gallium Nitride (GaN), based half-bridge converter module is designed and implementedfor integration. For a case study of a machine of outer radius 75 mm, axial length 80 mm and six statormodules, the resulted surface area for each converter module is 80*87 mm2. The size of the convertermodule was reduced so as to exactly match the available surface around the machine. A method for thecalculation of the maximum power per module is introduced resulting in 1032W per module for the casestudy considered in the paper. A method for the DC-link capacitor design is introduced and the influenceof the stator phases connections on the DC-link current stress is explained. Experimental measurementsare done on one segment of the proposed integration topology. |
