Abstract
Enhanced cooling, coupled with novel designs and packaging of semiconductors, has revolutionized communications, computing, lighting, and electric power conversion. It is time for a similar revolution that will unleash the potential of electrified propulsion technologies to drive improvements in fuel-to-propulsion efficiency, emission reduction, and increased power and torque densities for aviation and beyond. High efficiency and high specific power (kW/kg) electric motors are a key enabler for future electrification of aviation. To improve cooling of emerging synchronous machines, and to realize performance and cost metrics of next-generation electric motors, electromagnetic and thermomechanical co-design can be enabled by innovative design topologies, materials, and manufacturing techniques. This paper focuses on the most recent progress in thermal management of electric motors with particular focus on electric motors of significance to aviation propulsion.
Highlights
The global fleet of aircraft is projected to more than double to 48,000 in the 20 years.The increase in air travel is driven by population, economic growth, and the growing global middle class [1]
High efficiency and high specific power electric motors are a key enabler for future electrification of aviation
This review focused on the role of thermal management and most recent improvements to the current thermal limitations of electric motors, with emphasis on approaches to increase the electrification of air transport
Summary
The global fleet of aircraft is projected to more than double to 48,000 in the 20 years. Developments in high-power density motors may increase feasibility of electricofpersonal personal transporters, multi-passenger vehicles, and well as electricity compact electricity generators. Most permanent motors have an electromagnetic stator that synchronously advantageous for aircraft propulsion.magnet. Most permanent magnet motors have an electromagnetic stator drives the permanentdrives magnetthe rotor, which transmits the which power to the transmits propulsionthe blades. Axial flux flux motor motor architectures architectures produce magnetic flux along the motor axis, necessitating that the rotor and stator be the same diameter and adjacent along the axis motors driving a single fontfont propeller havehave beenbeen demonstrated in high axis of ofthe themotor. Each of these configurations may be compatible with distributed propulsion
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