High Power Density Dual Rotor Permanent Magnet Motor with Integrated Cooling and Drive for Aircraft Propulsion

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Melbourne, Florida
Project Term:
02/22/2021 - 08/21/2024

Technology Description:

Advanced Magnet Lab (AML) seeks to develop high-power density permanent magnet motors. When coupled to an integrated SiC (silicon carbide) drive, these motors will enable an overall specific power beyond 12 kW/kg. The proposed concept relies on (1) the tight integration of a high-power density dual-rotor permanent magnet rotor based on "continuous flux directed" magnets (PM-360TM) currently under development at AML, (2) high-power density SiC power converters, and (3) a shared closed-loop cooling system rejecting the heat in the propulsion ducted fan air stream. The proposed motor is based on a dual-rotor configuration using permanent magnets forming ideal Halbach arrays (a permanent magnet arrangement that creates a stronger field on one side and reduces the field on the other side to near zero) allowing for high magnetic loading without the need for iron. Integrating the motor and power converter will enable very high-power density, which is paramount in aircraft application.

Potential Impact:

The ASCEND program has the potential to accelerate innovations and cause disruptive changes in the emerging electric aviation field.


The program will further enhance U.S. technology dominance in the field of high-performance electric motors for hybrid electric aviation. Electrified aircraft architectures can increase reliability by increasing redundancy.


An all-electric propulsion system operating on CNLF would have net-zero emissions and be much quieter for passengers and people in the vicinity of airports.


By targeting propulsion system efficiency and specific power improvements, CNLF-powered, zero-net emission aircraft will be capable of a longer range and reduced fuel cost, making them economically more attractive.


ARPA-E Program Director:
Dr. Peter de Bock
Project Contact:
Dr. Philippe Masson
Press and General Inquiries Email:
Project Contact Email:


Florida State University

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