Thermal Integration of a High-Frequency High-Specific-Power Motor within Electrically Variable Engine

As the aircraft industry moving towards electrification, light-weight electrical machine design is desired to enable hybrid-electric engine technology. While minimizing machine sizing/weight, thermal management becomes more challenging in the harsh engine environment. This paper discusses various motor cooling options integrated with engine system and evaluates their impacts on electrical machine sizing and performances. Transient duty operation is also studied to learn torque boost capabilities at the takeoff stage. The usage of phase change material shows potential benefits to extend the transient time of motor peak torque operation.