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

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DSP implementation of DTC-SVM control Experimental results presented in Figures 7.22-7.29 well confirm the effectiveness of developed controller synthesis methodology and proper operation of speed control loop for parallel DTC-SVM structure. Sensorless speed operation Dynamic tests for the speed control loop without motion sensor were measured for sampling time T = 200µ s. Please note that the digital speed controller parameters were s selected exactly like for operation with speed sensor according to Table 5.5 (see Chapter 5.4). The results of speed estimator dynamic test are presented in Fig. 7.30. In this test speed controller operates with the encoder signal in feedback and speed estimator works in open loop fashion. Figure 7.30. Experimental dynamic test of the speed estimation. Speed reversal Ω =± 300rpm From the top: 1- reference speed (180rpm/div), 2- measured speed (180rpm/div), 3 - estimated speed (180rpm/div), 4- error of estimated speed (5%/div). m The typical dynamic performance tests of sensorless DTC-SVM drive has been illustrated in Fig. 7.31-7.36. Start up and breaking to zero speed for different speed level are shown in Fig. 7.31 and 7.33. Also, the speed reversal for low (Fig. 7.32) and nominal (Fig. 7.34) speed are presented. The half load torque step change tests are shown in Fig. 7.36 and 7.37. 156
DSP implementation of DTC-SVM control Figure 7.31. Experimental start up and breaking to zero speed of PMSM motor controlled via DTC-SVM with the estimated speed signal taken to the feedback ( Ω m = 0rpm → 300rpm ). From the top: 1- reference speed (180rpm/div), 2- measured speed (180rpm/div), 3 - electromagnetic torque (20Nm/div), 4- motor phase current (20A/div). Figure 7.32. Experimental speed reversal for PMSM motor controlled via DTC-SVM with the estimated speed signal taken to the feedback ( Ω m =−300rpm → 300rpm ). From the top: 1- reference speed (360rpm/div), 2- measured speed (360rpm/div), 3 - electromagnetic torque (20Nm/div), 4- motor phase current (20A/div). 157
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POLITECHNIKA WARSZAWSKA WARSAW UNIV
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Contents Table of Contents Chapter
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Introduction Chapter 1 INTRODUCTION
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Introduction to surface-mounted mac
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Introduction vector control, which
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Introduction presented and studied.
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Modeling and control modes of PM sy
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Voltage source PWM inverter for PMS
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Control methods of PM Synchronous m
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Direct Torque Control with Space Ve
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Page 167 and 168: Appendices APPENDICES A1 Rotor and
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Page 177 and 178: References Books and PhD-Thesis 1.
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Page 181 and 182: References 74. N. Ertugrul, P. Acar
Page 183 and 184: References 108. D. Świerczyński,
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