电气自动化专业英语 第3版PDF电子书下载

CONTENTS 1

PART1 ELECTRONICS 1

1 Electrical Measuring Instruments 1

1.1 SAFETY PRECAUTION 1

1.2 BASIC METER CONSTRUCTION AND OPERATION 2

1.3 USE OF MEASURING INSTRUMENT 5

2 Fundamentals of Solid-State Power Device 19

2.1 INTRODUCTION 19

2.2 SOLID-STATE POWER DEVICES 19

2.3 POWER SEMICONDUCTOR CAPABILITIES 25

2.4 PHYSICAL CHARACTERISTICS OF POWER SEMICONDUCTORS 26

2.5 COMMUTATION 28

2.6 SUMMARY 32

3 Analog Electronics 37

3.1 INTRODUCTION 37

3.2 OPERATIONAL-AMPLIFIER CIRCUITS 40

4 Digital Electronics 56

4.1 ThE DIGITAL IDEA 56

4.2 ASYNCHRONOUS DIGITAL SYSTEMS 64

4.3 SEQUENTIAL DIGITAL SYSTEMS 68

PART 2 ELECTRICAL MACHINE,CONTROL COMPONENT AND SENSOR5 Introduction to Electrical Machines 81

5.1 BRIEF HISTORY OF ELECTRICAL MACHINES 81

5.2 BASIC CONSTRUCTION OF ELECTRICAL MACHINES 83

5.3 CONSTRUCTION FEATURES OF ELECTRICAL MACHINES 85

6 DC Motor and Induction Motor 96

6.1 TYPES OF DC MOTORS 96

6.2 DC MOTOR ANALYSIS 101

6.3 DC MOTOR SPEED-TORQUE CHARACTERISTICS 103

6.4 THREE-PHASE INDUCTION MOTOR 109

6.5 INDUCTION MOTOR TORQUE-SPEED CHARACTERISTICS 111

7 Electrical Machine Control Systems 120

7.1 CONTROL SYMBOLS 120

7.2 MACHINE CONTROL WITH SWITCHES 120

7.3 CONTROL EQUIPMENT FOR ELECTRICAL MACHINES 124

7.4 MOTOR STARTING SYSTEMS 131

7.5 FORWARD AND REVERSE CONTROL 138

7.6 DYNAMIC BRAKING 140

8 Control Sensors 145

8.1 INTRODUCTIN 145

8.2 SENSORS AND TRANSDUCERS 147

8.3 ANALOG SENSORS FOR MOTION MEASUREMENT 149

8.4 DIGITAL TRANSDUCERS 154

PART 3 COMPUTER CONTROL TECHNIQUES 166

9 Introduction of Computernets 166

9.1 USES OF COMPUTER NETWORKS 169

9.2 NETWORK HARDWARE 175

9.3 NETWORK SOFTWARE 187

9.4 EXAMPLE NETWORKS 203

10 Introduction of Programmable Controller 224

10.1 HISTORY 224

10.2 BASIC CONCEPTS 226

10.3 GENERAL APPLICATION AREAS 227

10.4 OPERATING ENVIRONMENT CONSIDERATIONS 232

10.5 DEDICATED MICROPROCESSOR BASED SYSTEM—A CONTRAST 235

10.6 PERSONAL COMPUTER IMPLICATIONS 236

10.7 FACTORY AUTOMTION AND PROGRAMMABLE CONTROLLERS 238

11.1 THE CENTRAL PROCESSING UNIT 242

11 Foundation of PLC 242

11.2 INSTALLATION AND MAINTENANCE 256

11.3 APPLICATIONS 262

PART 4 AUTOMATIC CONTROL SYSTEMS 274

12 Electrical Distribution 274

12.1 PRIMARY DISTRIBUTION SYSTEMS 274

12.2 CONSUMER DISTRIBUTION SYSTEMS 275

12.3 GROUNDING OF ELECTRICAL SYSTEMS 282

12.4 GROUNDING OF ELECTRICAL EQUIPMENT 283

12.5 GROUND-FAULT PROTECTION 283

12.6 THREE-PHASE SYSTEMS 285

12.7 HARMONIC EFFECT OF FLUORESCENT LIGHTING FIXTURES 287

13.1 INTRODUCTION 291

13 Introduction to Control Engineering 291

13.2 DEFINITIONS 294

13.3 THE POSITION-CONTROL SYSTEMS 298

13.4 PROCESS-CONTROL SYSTEMS 302

13.5 AUTONOMIC CONTROL SYSTEMS 305

13.6 REASONS WHY CONTROL SYSTEMS ARE PREFERRED TO HUMAN OPERATIONS 306

13.7 CONCLUDING REMARKS 307

14 Speed Control of DC Motor 312

14.1 REGULATORATOR SYSTEMS 312

14.2 ELECTRICAL BRAKING 312

14.3 DC MOTOR SPEED CONTROL 314

14.4 A SINGLE-QUADRANT SPEED CONTROL SYSTEM USING THYRISTORS 315

14.5 PROTECTION CIRCUITS OR LIMITING CIRCUITS 318

14.6 THE CLOSED-LOOP WARD-LEONARD METHOD OF SPEED CONTROL 319

14.7 TYPES OF PHASE-CONTROLIED THYRISTOR DC DRIVES 323

14.8 DUAL-CONVERTER DRIVE 325

14.9 COMPUTER MONITORING OF SPEED PROFILE 328

14.10 PULSE-WIDTH MODULATION SPEED CONTROL OF DC MOTORS 330

15 Frequency Controls for AC Motors 334

15.1 ADJUSTABLE-FREQUENCY CONCEPTS 334

15.2 TERMINOLOGY 336

15.3 PWM VERSUS AVI VERSUS CSI 337

15.4 PERFORMANCE COMPARISONS OF PWM,AVI,AND CSI 340

15.5 APPLICATIONS OF GENERAL-PURPOSE INVERTERS 342