Magnetics Business & Technology - March/April 2022 - 18
RESEARCH & DEVELOPMENT
FEV Develops Concept for Oil-Cooled EV Motor
Conventional e-motors can only briefly call up their maximum
power during operation as this results in high thermal stress, the
company notes, but its special cooling solution is designed to
counteract this limitation. While water as a coolant cannot be used
for cooling directly at the copper windings in the e-motor due to its
conductivity, FEV uses a special non-conductive oil which is also
used as a lubricant in the motor.
Within the system, the oil is guided by centrifugal force via the
shaft to the heat-conducting copper windings during motor operation
to cool them efficiently. This allows the power density of the
motor to be significantly improved and the increased torque to be
called up for a longer duration. Alternatively, cooling allows the
engine to be downsized while maintaining the same power density,
resulting in installation space advantages in the vehicle.
An oil-cooled e-motor designed for optimizing maximum power
in electric vehicles has been developed by automotive supplier
FEV. Based on centrifugal cooling, the oil flows under the rotor
core and magnets onto the copper windings and can increase
the continuous output of the motor by up to 50 percent, says the
company. It has been presenting the concept system at various
automotive technical events.
As explained in a presentation by Andreas Sehr, director, the centrifugal
cooling oil flows through the rotor shaft, through 5 radial
bores under the rotor core and the magnets, after which the oil is
guided to the front and rear side where it sprayed directly on the
stator windings. The oil is pumped into the system via an external
oil pump. The system exploits the centrifugal force (when rotating)
for the distribution of the oil in the system.
The oil flows by external connections into two spray rings at the
Oil distribution concept: centrifugal cooling
18 Magnetics Business & Technology * March/April 2022
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Magnetics Business & Technology - March/April 2022
Table of Contents for the Digital Edition of Magnetics Business & Technology - March/April 2022
Magnetics Business & Technology - March/April 2022
Editor’s Choice/ Features
The Big Screen: Special Effects with the Aid of Absolute Draw-Wire Encoders
Magelec to Supply PM Axial Flux Motor Systems for New e-Car Racing Circuit
GE Power Conversion Equips Navy Fleets with Electric Propulsion Systems
Research & Development
Product News
Industry News
Events Calendar/ Advertising Index
Soft Saturation Important for Inductors in SMPS, Explains Abracon
Tech Tips
Magnetics Business & Technology - March/April 2022 - Magnetics Business & Technology - March/April 2022
Magnetics Business & Technology - March/April 2022 - Cover2
Magnetics Business & Technology - March/April 2022 - 3
Magnetics Business & Technology - March/April 2022 - Editor’s Choice/ Features
Magnetics Business & Technology - March/April 2022 - 5
Magnetics Business & Technology - March/April 2022 - The Big Screen: Special Effects with the Aid of Absolute Draw-Wire Encoders
Magnetics Business & Technology - March/April 2022 - 7
Magnetics Business & Technology - March/April 2022 - 8
Magnetics Business & Technology - March/April 2022 - 9
Magnetics Business & Technology - March/April 2022 - Magelec to Supply PM Axial Flux Motor Systems for New e-Car Racing Circuit
Magnetics Business & Technology - March/April 2022 - 11
Magnetics Business & Technology - March/April 2022 - 12
Magnetics Business & Technology - March/April 2022 - 13
Magnetics Business & Technology - March/April 2022 - GE Power Conversion Equips Navy Fleets with Electric Propulsion Systems
Magnetics Business & Technology - March/April 2022 - 15
Magnetics Business & Technology - March/April 2022 - 16
Magnetics Business & Technology - March/April 2022 - 17
Magnetics Business & Technology - March/April 2022 - Research & Development
Magnetics Business & Technology - March/April 2022 - 19
Magnetics Business & Technology - March/April 2022 - Product News
Magnetics Business & Technology - March/April 2022 - 21
Magnetics Business & Technology - March/April 2022 - 22
Magnetics Business & Technology - March/April 2022 - 23
Magnetics Business & Technology - March/April 2022 - Industry News
Magnetics Business & Technology - March/April 2022 - 25
Magnetics Business & Technology - March/April 2022 - 26
Magnetics Business & Technology - March/April 2022 - 27
Magnetics Business & Technology - March/April 2022 - Events Calendar/ Advertising Index
Magnetics Business & Technology - March/April 2022 - 29
Magnetics Business & Technology - March/April 2022 - Tech Tips
Magnetics Business & Technology - March/April 2022 - Cover3
Magnetics Business & Technology - March/April 2022 - Cover4
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