Challenges and Advances in Electric Propulsion Motor Thermal Management for Aircraft

 I.Introduction

 The global focus on reduction of CO2 emissions and sustainable development is driving the transition to hybrid and electric propulsion. While greater attention has been captured by land vehicles, the aviation community, including the U.S. Air Force, NASA and Boeing, has been conducting research on more electric aircraft (MEA), more electric engine (MEE) and electric propulsion for years. Some low-power, low-range fully electric aircraft with limited loading capacity have been developed already, dedicated to the flight training market, electric short take-off and landing (eSTOL) or electric vertical take-off and landing (eVTOL) short range transportation, and also serving as early steps towards larger scale developments.