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(b)
(a)
1.25
0.15
0.1
1.2
0.05
1.15
0
1.1
-0.05
0
0.5
1
0
0.5
1
time(s)
time(s)
(c)
(d)
2
0.1
0
1
-0.1
0
-0.2
-1
-0.3
0
0.5
1
0
0.5
1
time(s)
time(s)
u
sd
(dotted line).
Fig. 6 Flux responses of the DFI-Motor: a Tracking of
u
sd
:
u
sd
(solid line) and
u
sq
(dotted line). c Tracking of
u
rd
b Tracking of
u
sq
:
u
sq
(solid line) and
u
rd
:
u
rd
(solid line) and
(dotted line). d Response of
u
rq
The simulation results of the proposed FABC system are depicted in Figs.
5
,
6
and
7
. From these simulation results, we can clearly see that a satisfactory behavior
of the mechanical speed with regard to the imposed speed pro
le is obtained
without the knowledge of the load torque. Moreover, the load torque estimator
gives a correct estimation for the actual load torque.
We can observe clearly that the
flux responses respect the imposed constraints.
So, after transient, the stator and the rotor
fl
fl
fluxes recover respectively their reference
signals. Consequently, the
flux orientation objective is guaranteed, and the stator
reactive power is equal zero in steady-state operation. Also, the results show
quickness of transients, good robustness and insensitivity in the face of the
uncertainties.
fl
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