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 ...
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<strong>Direct</strong> <strong>Torque</strong> <strong>Control</strong> <strong>with</strong> <strong>Space</strong> <strong>Vector</strong> <strong>Modulation</strong><br />
The behavior <strong>of</strong> the torque control loop was tested using SABER simulation package.<br />
The model created in SABER takes into account the whole control system, which<br />
include real models <strong>of</strong> inverter and permanent magnet synchronous motor.<br />
The torque step response is shown in Fig. 5.44, when parameters <strong>of</strong> PI torque controller<br />
designed for sampling time T s<br />
= 200µ s were used for control plant for different<br />
sampling times T s<br />
= 50µ s , 100µ s , 200µ s , 400µ s , which correspond to switching<br />
frequency f<br />
s<br />
= 20kHz, 10kHz, 5kHz, 2.5kHz.<br />
Figure 5.44. <strong>Torque</strong> tracking performance for different sampling time T s<br />
= 50µ s , 100µ s ,<br />
200µ s , 400µ s ( f<br />
s<br />
= 20kHz, 10kHz, 5kHz,2.5kHz) using parameters <strong>of</strong> PI controller<br />
designed for T<br />
s<br />
= 200µ s ( f<br />
s<br />
= 5kHz). Pleas note that for 2.5kHz the system was unstable.<br />
After modification <strong>of</strong> PI flux controller parameters according to Table 5.4 it is possible<br />
to achieve better results as shown in Fig. 5.45, what confirms proper torque tracking<br />
performance in steady and dynamics state.<br />
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