Direct Torque Control with Space Vector Modulation (DTC-SVM) of ...
Direct Torque Control with Space Vector Modulation (DTC-SVM) of ...
Direct Torque Control with Space Vector Modulation (DTC-SVM) of ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
DSP implementation <strong>of</strong> <strong>DTC</strong>-<strong>SVM</strong> control<br />
Figure 7.9. Experimental steady state operation <strong>of</strong> PMSM controlled via <strong>DTC</strong>-<strong>SVM</strong> <strong>with</strong> the<br />
encoder speed signal taken to the feedback ( Ω = 1500rpm<br />
, M = 10Nm<br />
-50% <strong>of</strong> nominal<br />
torque). From the top: 1) amplitude <strong>of</strong> stator flux (0.25Wb/div), 2) electromagnetic torque<br />
(10Nm/div), 3) line to line voltage (1000V/div), 4) stator phase current (10A/div).<br />
m<br />
l<br />
7.3 Dynamic behaviour<br />
The experimental results <strong>of</strong> flux and torque control loop obtained in dynamic states for<br />
PMSM machine controlled via two different <strong>DTC</strong>-<strong>SVM</strong> schemes are presented.<br />
7.3.1 Flux and torque control loop<br />
Cascade <strong>DTC</strong>–<strong>SVM</strong> control scheme (Fig. 5.46a)<br />
In order to show behaviour <strong>of</strong> the system the dynamic testes for the flux and torque<br />
controllers has been carried out for sampling time, T = 200µ<br />
s. It corresponds to<br />
switching frequency f = 5kHz<br />
. Please note that the flux digital controller parameters<br />
s<br />
were selected according to Table 5.1 and the torque digital controller parameters were<br />
selected from Table 5.2. (see Chapter 5.2).<br />
In Fig. 7.10 stator flux tracking performance is presented. This result is comparable<br />
<strong>with</strong> simulation results presented in Fig. 5.15.<br />
s<br />
143