Simulation, design and validation of a UAV SOFC propulsion system

This paper provides a physically-based model for design and optimization of a fuel cell powered electric propulsion system for an Unmanned Aerial Vehicle (UAV). Components of the system include a Solid Oxide Fuel Cell (SOFC) providing power, motor controller, Brushless DC (BLDC) motor, and a propeller. The simulation allows an operator to select constraints and explore design trade-offs between components, including fuel cell, controller, motor and propeller options. We also present a graphical procedure using this model that allows rapid assessment and selection of design choices, including fuel cell characteristics and hybridization with multiple sources. A series of tests conducted on an instrumented propulsion system in a low-speed wind tunnel reveal good correlation to the simulated results and validate the simulation model and design techniques.