AC loss in REBCO stator windingsof superconducting motors for
electric and hybrid aircrafts
Source: Airbus group innovations
RPHI REBCO stator coil
(section of J maps below)
Stacks of REBCO tapesor permanent magnets
y
xz
AC loss modeling method Coils in motor
Stand-alone coil
Electric and hybrid airplaneswill reduce emissions
Light powerful superconducting motors
Qualitative sketch
Goals:1 MW20 kW/kg
Three coupling situations
Tapes coupled at endsAssume J uniformin stator coils
Computevector potentialby COMSOL
Remove contribution from all coilsand calculateactual J and AC
loss by MEMEP
Models take into accountInteraction between J in each stator
coil and:
Models do not take into accoutInteraction between magnetization
currents and iron
Valid for sufficient distancebetween coils and iron
All other superconducting coils and their magnetization
currents
All iron parts
Rotor
coils with iron (no rotor)
Fully coupled in whole lengthcable made of n parallel tapes
x
zy
I
ReBCO tapemetal
Cable section andconnections
bare coils (no iron or rotor; for model test purposes
only)circled sectionin sketch
Isolating tapes reduces AC lossalmost as much as uncoupled
case,such as transposed cables
E Pardo1, F Grilli2, T Reis3, S Wolfstädter3
Horizon 2020 project ASuMED partners
(http://asumed.oswald.de):
1Institute of Electrical Engineering, Slovak Academy of
Sciences, Bratislava2Kalrsruhe Institute of Technology3OSWALD
Elektromotoren GmbH
x
z
y
Coupled at ends only
I
Uncoupled (ideal situation)I/nI/nI/nI/n
with loadcurrent amplitude = Im,load
no loadcurrent amplitude = 0
full motor with iron and rotor (situation with load; same
current as above)
[DOI: 10.1088/0953-2048/28/4/044003]
full motor with iron and rotor (no-load situation: zero current
in stator)
Combining numerical methodsenables to model AC loss in stator of
full superconducting motor
Funded by the European CommissionGrant No 723119
EUCAS 2017, Geneva
The calculations from IEE were performed in the Computing Centre
of the Slovak Academy of Sciences using the supercomputing
infrastructure acquired in project ITMS 26230120002 and 26210120002
(Slovak infrastructure for high-performance computing) supported by
the Research & Development Operational Programme funded by the
ERDF.
http://asumed.oswald.de/https://doi.org/10.1088/0953-2048/28/4/044003
Slide 1
