t. m. wolbank - ieam€¦ · v. lešić 1, m. vašak, m. gulin 1, n. perić, g. joksimović2 and t....
TRANSCRIPT
V. Lešić1, M. Vašak1, M. Gulin1, N. Perić1, G. Joksimović2 and
T. M. Wolbank3
1 University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia 2 University of Montenegro, Faculty of Electrical Engineering, Podgorica, Montenegro 3 Vienna University of Technology, Faculty of Electrical Engineering and Information
Technology, Vienna, Austria
EPE-PEMC 2012, Novi Sad,
September 4-6
The problem we tackle
Transient leakage inductance
Field-oriented control of asymmetric induction machine
Estimation of the asymmetry
Simulation results
Conclusions
2 EPE-PEMC 2012, Novi Sad
Modern electric drives are required to have best possible performances
Control is based on fundamental-wave machine model (FOC, DTC) – neglects saliencies, asymmetries, parameter variations, valid only if the flux position is well determined
Real machine physics and geometry cause undesired effects like speed pulsations, torque ripple
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Inherent and fault-induced asymmetries can be noticed in the instantaneous value of leakage inductance
We propose to respect machine asymmetries from the control viewpoint flux-angle-dependent value of leakage inductance
Kalman filter is widely-spread method for estimation of variables used in control extend to estimate location and value of the asymmetry
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EPE-PEMC 2012, Novi Sad 5
r
msl
L
LLL
2
sL rL
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G. Stojčić et. al., Separating Inherent Asymmetries from High Sensitivity Rotor Bar Fault Indicator, SDEMPED 2011
healthy faulty
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2
mod,
j
offsettl eLLL offsetl LL
)2cos(mod LLL offsetld
)2sin(mod LLlq
Value
Location
common dq:
Model
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dt
diLikuu sd
asdasdsd
dt
diLiRuu
sq
asqssqsq
dt
diLi
L
L
Tu
sq
lemr
r
m
r
sd 21
sdlemr
r
mesq iLi
L
Lu
2
r
sasa
T
LLRk
la LL
Symmetric machine
Model
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dt
diLikuu sd
asdasdsd
dt
diLiRuu
sq
asqssqsq
r
sasa
T
LLRk
mrs
ld
lq
e
r
sasqaes
ld
lq
sq
ld
lq
sd iLL
L
T
LLiLR
L
Lu
L
Lu
mrseae
r
s
ld
lq
sdae
r
s
ld
lq
s
ld
lq
sd
ld
lq
sd iLLT
L
L
LiL
T
L
L
LR
L
Lu
L
Lu
Asymmetric machine
ld
lq
ldaL
LLL
2
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S. Haykin, Kalman Filtering and Neural Networks, 2001
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Control system block scheme
Tmrsqsd iiix T21 Tgbcab uuu
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Estimation turned on at t=10 s
Manufacturing imperfections, machine anisotropy and faults are cause of asymmetries in the machine
Asymmetries are manifested as variations in leakage inductance can be detected by diagnostics algorithm
Machine performance can be improved by respecting asymmetries in the control procedure upgrade to fundamental-wave approach
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The research leading to these results has received funding:
• from the European Community's Seventh Framework Programme under grant agreement no 285939 (ACROSS),
• from FP7 SEE-ERA.NET PLUS under contract No. ERA 80/1 (MONGS).
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