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

Direct Torque Control with Space Vector Modulation
The behavior of the flux control loop was tested using SABER simulation package. The
model created in SABER takes into account the whole control system, which include real
models of inverter and permanent magnet synchronous motor.
The flux step response is shown in Fig. 5.32., when parameters of PI flux controller designed
for sampling time T s
= 200µ s were used for control plant for different sampling times
T
s
= 50µ s , 100µ s , 200µ s , 400µ s , which correspond to switching frequency f
s
= 20kHz,
10kHz, 5kHz, 2.5kHz.
Figure 5.32. Flux tracking performance for different sampling time T
s
= 50µ s , 100µ s , 200µ s ,
400µ s ( f
s
= 20kHz, 10kHz, 5kHz,2.5kHz) using parameters of PI controller designed for
T
s
= 200µ s ( f
s
= 5kHz).
After modification of PI flux controller parameters according to Table 5.31 it is possible to
achieve better results as shown in Fig. 5.33, what confirms proper flux tracking performance
in steady and dynamics state.
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