Direct Torque Control with Space Vector Modulation (DTC-SVM) of ...

Direct Torque Control with Space Vector Modulation
Ω m _ ref
( z)
P ( z)
Ω
C ( z)
Ω
M
_
() z
e ref
D ( z)
Ω
M ( ) e
z
M ( L
z )
GΩ
( z)
}
ZOH
1
Js
Ω ( z m
)
F ( z)
Ω
Figure 5.52. Speed response with digital filter in feedback FΩ ( z)
and prefilter PΩ ( z)
at the
input.
The speed response with and without prefilter are shown in Fig. 5.53.
Without prefilter
With prefilter
Figure 5.53. Speed response: blue signal without prefilter and green signal with prefilter at the
input.
Design parameters of PI speed controller for sampling time T
s
= 50 µ s,
100 µ s,
200 µ s,
400µ s are summarized in Table 5.5.
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