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

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DSP implementation of DTC-SVM control Influence of sampling time for torque control loop in parallel DTC-SVM The influence of sampling time on experimental torque tracking performance is illustrated in Fig. 7.19-7.21. The dynamic test has been carried out for the same condition ( Ω = 0rpm ) as for simulation shown in Fig. 5.45. The controller parameters m has been set according to Table 5.4. In all oscilograms we may see proper operation of the torque control loop for different sampling time used in practice. Figure 7.19. Experimental torque tracking performance of PM synchronous motor for zero speed at sampling time Ts = 100µ s. Reference torque from 0 to nominal value. From the top:1- reference torque (4Nm/div), 2 - estimated torque (4Nm/div) Figure 7.20. Experimental torque tracking performance of PM synchronous motor for zero speed at sampling time Ts = 200µ s. Reference torque from 0 to nominal value. From the top:1- reference torque (4Nm/div), 2 - estimated torque (4Nm/div). 150
DSP implementation of DTC-SVM control Figure 7.21. Experimental torque tracking performance of PM synchronous motor for zero speed at sampling time Ts = 400µ s. Reference torque from 0 to nominal value. From the top:1- reference torque (4Nm/div), 2 - estimated torque (4Nm/div). In this Chapter the results of experimental verification 3kW PMSM drive with two DTC-SVM schemes has been presented. As shown the drive performance confirms applied design methodology. The performance of both cascade and parallel DTC-SVM control structure are similar. However, parallel structure has been selected for industrial manufacturing because of : • less noisy control algorithm (differentiation required in cascade structure – equation (5.6) is eliminated), • stator flux control in closed loop, • the same structure can be used for IM and PMSM control (universal control for AC motors). 7.3.2 Speed control loop 0peration with speed sensor Dynamic testes for the speed control loop were measured for sampling timeT = 200µ s. Please note that the digital speed controller parameters were selected according to Table 5.5 (see Chapter 5.4). In Fig. 7.22-7.26 rotor speed tracking performance are presented. s 151
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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 103 and 104: Direct Torque Control with Space Ve
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Page 165 and 166: Summary and closing conclusion Chap
Page 167 and 168: Appendices APPENDICES A1 Rotor and
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Page 173 and 174: Appendices A7 PWM technique - six s
Page 175 and 176: List of symbol List of symbols Symb
Page 177 and 178: References Books and PhD-Thesis 1.
Page 179 and 180: References 39. J.-I. Itoh, N. Nomur
Page 181 and 182: References 74. N. Ertugrul, P. Acar
Page 183 and 184: References 108. D. Świerczyński,
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