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

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Contents 6.3.4 Voltage model based flux estimator with low pas filter 129 6.3.5 Improved voltage model based flux estimator 130 6.4 Electromagnetic torque estimation 132 6.5 Rotor speed estimation methods 132 6.5.1 Overview 132 6.5.2 Back electromotive force (BEMF) technique 133 6.5.3 Stator flux based technique 133 6.6 Summary 136 Chapter 7 137 DSP IMPLEMENTATION OF DTC-SVM CONTROL 7.1 Description of the laboratory test-stand 137 7.2 Steady state behaviour 140 7.3 Dynamic behaviour 143 7.3.1 Flux and torque control loop 143 7.3.2 Speed control loop 151 Chapter 8 161 SUMMARY AND CLOSING CONCLUSIONS Appendices 163 Picture of rotor and stator of PMSM machine Basic transformation Model of PM synchronous motor- SABER Parameters of PMSM machine Parameters of voltage source inverter PI speed controller PWM technique - overmodulation List of Symbols 170 References 172
Introduction Chapter 1 INTRODUCTION Recently, an increased interest in application of permanent magnet synchronous motors (PMSM) in speed controlled drives has been observed. This is stimulated mainly by: • development of modern high switching frequency semiconductor power devices (as for example IGBT modules of 5-th generation), • new rare earth magnetic materials as samarium-cobalt (Sm-Co) or neodymium-ironboron (Nd-Fe-B), • specialized digital signal processor (DSP) for AC drive applications with integrated PWM function, A/D converters as well as processing of encoder signals (e.g ADMC401, TMS320FL24XX, TMS320FL28XX). Synchronous motors with an electrically excited rotor winding have a conventional threephase stator winding (called armature) and an electrically excited field winding on the rotor, which carries a DC current. The armature winding is similar to the stator of induction motor. The electrically excited field winding can be replaced by permanent magnet (PM) [1]. The use of permanent magnets has many advantages including the elimination of brushes, slip rings, and rotor copper losses in the field winding. It leads to higher efficiency. Additionally since the copper and iron losses are concentrated in the stator, cooling of machines through the stator is more effective. The lack of field winding and higher efficiency results in reduction of the machine frame size and higher power/weight ratio. Figure. 1.1. General classification of AC synchronous motors. 1
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Page 3: Contents Table of Contents Chapter
Page 7 and 8: Introduction to surface-mounted mac
Page 9 and 10: Introduction vector control, which
Page 11 and 12: Introduction presented and studied.
Page 13 and 14: Modeling and control modes of PM sy
Page 39 and 40: Voltage source PWM inverter for PMS
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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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Sensorless Speed Direct Torque Cont
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DSP implementation of DTC-SVM contr
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Summary and closing conclusion Chap
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Appendices APPENDICES A1 Rotor and
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Appendices ⎡ ⎤ ⎢ 1 0 ⎥ ⎡K
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Appendices i(t1->t0)+=it1 it1: it1=
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Appendices A7 PWM technique - six s
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List of symbol List of symbols Symb
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References Books and PhD-Thesis 1.
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References 39. J.-I. Itoh, N. Nomur
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References 74. N. Ertugrul, P. Acar
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References 108. D. Świerczyński,
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