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. 5.12., when parameters of P 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 5.12. 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 gain of P controller designed
for T
s
= 200µ s ( f
s
= 5kHz).
After modification of P flux controller gain according to Table 5.1 it is possible to
achieve better results as shown in Fig. 5.13, what confirms proper flux tracking
performance in steady and dynamics state.
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