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

DSP implementation of DTC-SVM control
Figure 7.15. Experimental torque tracking performance of PM synchronous motor for zero
speed at sampling time T = 400µ
s( f = 2.5kHz
). Reference torque from 0 to nominal value.
s
From the top:1- reference torque (4Nm/div), 2 - estimated torque (4Nm/div).
s
Parallel structure of DTC–SVM scheme (Fig. 5.46b)
Dynamic testes for the flux and torque controllers were carried out for sampling time
Ts
= 200µ
s, which corresponds to switching frequency f = 5kHz
. Please not that the
digital flux controller parameters were selected according to Table 5.3 and the digital
torque controller parameters were selected from Table 5.4. (see Chapter 5.3).
In Fig. 7.16 stator flux tracking performance is presented. This result is comparable
with simulation results presented in Fig. 5.33 for flux and Fig. 5.45 for torque loop,
respectively.
s
147