Magnetics Business & Technology - May/June 2022 - 25

RESEARCH & DEVELOPMENT
Flux-Switching Machine Based All-Electric Power Train for
Commercial Aircraft
Power density and efficiency are crucial to electric propulsion
for future aviation systems. The University of California, Santa
Cruz proposes to build a novel all-electric power train encompassing
several unique technologies. The machinery relies on a
flux-switching motor with high temperature superconducting field
coils, which is smaller and lighter than conventional designs and
has an immense advantage in terms of thermal management.
The electronics are based on state-of-the-art silicon carbidebased
multilevel inverter technology, which can easily interface
to a medium-voltage power supply and lower electromagnetic
noise and insulation stress on the motor. An innovative cryogenic
system using solid or slushed coolant will cool stationary hightemperature
superconductor field coils at 60K.
Georgia Tech - High Power Density Motor for Electric
Transportation
Georgia Tech Research Corporation is studying a new approach
to internally cool permanent magnet motors. The technology
could dramatically improve electric motors' power density and
reduce system size and weight. The researchers will integrate
motor and drive electronics into a unique system packaging incorporating
an embedded advanced thermal management system.
They will also develop wide bandgap power electronics packaging
to enable high power density operations at higher temperature.
The new design could substantially increase the power and
torque density above the state of the art and enable more energyefficient
electric trucks, buses and, potentially, aircraft.
Advanced Magnet Lab - Dual Rotor Permanent Magnet Motor
for Aircraft Propulsion
AML seeks to develop high-power density permanent magnet
motors that, when coupled to an integrated silicon carbide drive,
would enable an overall specific power beyond 12 kW/kg. The
concept relies on tight integration of a high-power density dualrotor
permanent magnet rotor based on " continuous flux directed "
magnets which it is developing, The motor is based on a dualrotor
configuration using permanent magnets forming Halbach
arrays of permanent magnets which create a stronger field on one
side and reduce the field on the other side to near zero, allowing
for high magnetic loading without the need for iron.
Marquette University - High-Power Density Motor Equipped
with Additively Manufactured Windings for Electric Aviation
Marquette University and its partners are developing an electric
propulsion system that consists of a high-power density motor
using additively manufactured winding and a heat pipe scheme
for thermal management scheme, a modular power electronics
topology, and tight system integration with shared thermal management
between the motor and power electronics. The proposed
technology is intended to be scalable in terms of power rating,
speed, and system voltage, able to serve a wide range of hybrid/
electric propulsion applications.
ARPA-E is the DOE's Advanced Research Projects Agency- Energy.
For more info, see www.arpae-summit.com.
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May/June 2022 * Magnetics Business & Technology 25
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Magnetics Business & Technology - May/June 2022

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