Automotive Engineering - March 2022 - 22

MOTOR MOVES
PROPULSION FEATURE
MercedesBenz
last year
acquired Yasa,
developer of
power-dense
and ultracompact
axialflux
permanentmagnet
motors.
chain for vertically integrated magnet manufacturing.
Lucid's Bach said his company also is endeavoring
to manage rare-earth consumption. " We are using
neodymium magnets, obviously, because that's where
you need to go. But we are using very, very little compared
to the competition, again, for the power that we
are pulling out. " He added Lucid is not using " heavy "
rare earths infused into neodymium to impart extra
heat-resistance characteristics crucial to consistent
traction-motor performance.
Honda and Toyota also have been developing drive
super expensive. You want to make sure you get as little as possible,
and then eventually maybe you get out of it altogether. That's where
the science is - how do you get the same efficiency and same
torque with less and less, and ultimately zero rare earth? "
In October 2021, GM and GE Renewable Energy announced a nonbinding
Memorandum of Understanding (MoU) " to evaluate opportunities "
to improve supplies of heavy and light rare-earth materials and
magnets, copper and electrical steel used for manufacturing of electric
vehicles and renewable energy equipment. The companies said the initial
focus is on creating a North American and European-based supply
motors without heavy rare-earth composition. Their
designs substitute more abundant and lower cost rare
earths that engineers believe can lead to magnets that
retain exceptional heat resistance.
Hemphill said Schaeffler is studying design improvements
such as improved cooling concepts to " reduce
magnet content and/or cost. " The company also is
developing new supply-chain partners to assure sustainable
supply, as well as studying vertical integration
AE Telco Ad 0322.qxp_1/2 Page Horizontal 2/11/22 5:51 PM Page 1
to control costs.
" At the moment, " he said, " it seems these measures
and the developing market will be sufficient to stay
with PM motors. "
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Automotive Engineering - March 2022

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