本論文旨在開發標準及無位置感測同步磁阻馬達驅動系統並評估其運轉性能比較。以三相升壓切換式整流器由市電對馬達驅動系統供電，在建立良好調控直流鏈電壓下，具良好入電電力品質。首先探究同步磁阻馬達驅動控制之一些關鍵事務進行探討，含馬達構造、繞組電感特性、轉矩產生特性以及槽齒諧波效應等。接著，建構標準同步磁阻馬達驅動系統，並實測評估其性能。藉由所提損失最小化適應換相機構及考慮反電動勢與槽齒效應之電流控制器以獲得良好之驅控性能。同時，亦從事量化與強健速度控制器設計。所提直接轉矩控制係應用磁通命令計算及靜止框估測之磁通及轉矩為之，可進一步提升馬達之轉矩追控性能。
接著，建構具雙向功率潮流聯網之三相切換式整流器前級。由市電建立具升壓之直流鏈，增強馬達驅動系統於高速高載下之操控特性，並具良好之入電電力品質。同時，再生煞車回收能量亦可有效地回送至電網。
最後，設計實現高頻訊號注入之無位置感測同步磁阻馬達驅動系統。先探究直軸及交軸高頻注入之比較特性，據以選用交軸高頻注入機構。同時，採用變頻注入機制，減少槽齒諧波效應，獲得精確估測角度及較穩定之運轉特性。此外，本論文亦展現高頻注入之無位置感測直接轉矩控制之同步磁阻馬達驅動系統。由一些實驗結果驗證於廣速度範圍之良好驅動特性。

The thesis presents the development of a standard and a position sensorless synchronous reluctance motor (SynRM) drives and performs their comparative performance evaluation. The motor drives are powered from the utility grid via a three-phase boost switch-mode rectifier (SMR). Under well-regulated DC-link voltage, good line drawn power quality is preserved simultaneously. First, some key issues affecting the driving performance of a SynRM drive are explored, including the motor structural features, the winding inductance, the electromagnetic developed torque characteristics, the slotting harmonic effects, etc. Then, a standard SynRM drive is established and evaluated. Good driving performance is yielded by the proposed commutation approach achieving total loss minimization automatically, and the proper current control considering the effects of back-EMF as well as slotting harmonics. Moreover, the practical quantitative and robust speed controls are also made. The proposed direct torque control (DTC) possesses faster tracking response through the reference fluxlinkage calculation and the estimated torque and flux-linkage.
Second, the bidirectional grid-connected three-phase SMR front-end is developed. The varied and boosted DC-link voltage is established from the mains. The motor driving performance under higher speed and heavier load is enhanced with good line drawn power quality. Moreover, it allows the regenerative braking power be recovered and sent back to
the utility grid.
Third, the high frequency injected (HFI) position sensorless controlled SynRM drive is designed and implemented. After exploring the comparative characteristics for d- and qaxis injected schemes, the q-axis injection is proposed to yield more stable and accurate estimated rotor position. Moreover, the varied-frequency injection is adopted to avoid the adverse effects caused by the inherent slotting harmonics. In addition, the HFI position sensorless DTC SynRM drive is presented. The satisfactory driving performance over wide speed range is verified by some measured results.

ABSTRACT i
ACKNOWLEDGEMENTS ii
LIST OF CONTENTS iii
LIST OF FIGURES v
LIST OF TABLES xi
LIST OF SYMBOLS xii
LIST OF ABBREVIATIONS xvii
CHAPTER 1 INTRODUCTION 1
CHAPTER 2 SYNCHRONOUS RELUCTANCE MOTOR DRIVE AND INTERFACE CONVERTERS
6
2.1 Introduction 6
2.2 Converter-fed SynRM Drive 6
2.3 Structure of Synchronous Reluctance Motor 7
2.4 Governing Equations 10
2.5 Switch-mode Rectifiers 14
2.6 The Employed DSP TMS320F28335 18
2.7 Sensing and Interfacing Circuits 19
CHAPTER 3 DC SOURCE POWERED STANDARD SYNCHRONOUS RELUCTANCE MOTOR DRIVE WITH FIELD-ORIENTED AND DIRECT-TORQUE CONTROLS 21
3.1 Introduction 21
3.2 FOC SynRM Drive 21
3.2.1 System Configuration 21
3.2.2 Mathematical Modeling of SynRM 23
3.2.3 Control Scheme 29
3.2.4 Experimental Evaluation for the Established FOC SynRM Drive for established 34
3.3 DTC SynRM Drive 44
3.3.1 Functional Description 45
3.3.2 Experimental Results of the Established DTC SynRM Drive 48
CHAPTER 4 SWITCH-MODE RECTIFIER FED SYNCHRONOUS RELUCTANCE MOTOR DRIVE
52
4.1 Introduction 52
4.2 The Developed Three-phase Full-bridge Boost SMR 52
4.3 Three-phase Full-bridge SMR fed Standard SynRM Drive 66
CHAPTER 5 POSITION SENSORLESS CONTROL OF SYNCHRONOUS RELUCTANCE MOTOR DRIVE 72
5.1 Introduction 72
5.2 The Developed SMR-fed HFI Position Sensorless FOC SynRM Drive
72
5.2.1 System Configuration 72
5.2.2 Sinusoidal Wave HFI Method 74
5.2.3 Experimental Evaluation 79
5.3 The Developed SMR-fed Position Sensorless DTC SynRM Drive 86
5.3.1 System Configuration 86
5.3.2 Position Estimation 86
5.3.3 Experimental Evaluation 88
5.4 Comparative Characteristics of the Developed SMR-fed Position Sensorless FOC and DTC SynRM Drive 93
CHAPTER 6 CONCLUSIONS 97
REFERENCES 98

A. Synchronous Reluctance Motor Drive
Fundamentals of SynRM
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B. Motor Control
MTPA and Loss minimization control
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Current control
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Direct torque control
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C. Three-phase AC/DC Converter
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D. Position Sensorless Control
Observer-based method
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Extended back-EMF method
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Method based on rotor saliency
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Square-wave type HFI
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E. Others
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