《电工基础》求取 ⇩

CONTENTS1

编者的话1

1．ELECTRICAL UNITS1

2．FUNDAMENTAL UNITS5

2—1 The Structure of Matter6

2—2 Electric Current9

2—3 Unit of Current:The Ampere10

2—4 Resistance:The Ohm12

2—5 Potential Difference and Electromotive Force:The Volt13

2—6 Measurement of Current,Voltage,and Re-sistance15

3．DIRECT-CURRENT CIRCUITS17

3—1 Series Circuits:Current Relations18

3—2 Series Circuits:Voltage Relations19

3—3 Parallel Circuits:Voltage Relations21

3—4 Parallel Circuits:Current Relations22

3—5 Ohm’s Law23

3—6 Applying Ohm’s Law25

3—7 Resistance in a Serics Circuit27

3—8 Resistance of a Parallel Circuit27

3—9 Scries-Parallel Circuits31

3—10 Temperature Coefficient of Resistance33

3—11 Line Drop35

3—12 Kirchhoff’s Laws37

3—13 Work38

3—14 Energy39

3—15 Mechanical Power40

3—16 Electric Power42

3—17 Electric Work and Energy44

3—18 Measurement of Electric Power and Energy46

3—19 Line Loss48

3—20 Three-Wire Distribution Circuits49

4．MAGNETISM54

4—1 Magnets and Magnetic Materials54

4—2 Magnetic Fields and Lines of Force55

4—3 Magnetic Attraction and Repulsion58

4—4 Nature of Magnetism59

4—5 Field around a Current-Carrying Conductor60

4—6 Field around a Coil62

4—7 Magnetomotive Force or MMF64

4—8 Electromagnets64

5．ELECTROMAGNETIC INDUCTION68

4—9 Saturation68

5—1 Induced EMF69

5—2 Factors Affecting the Amount of Induced EMF70

5—3 Faraday’s Law of Induction71

5—4 Numerical Value of Induced EMF71

5—5 Direction of Induced EMF72

5—6 Lenz’s Law of Induction73

5—7 Self-induced EMF:Inductance74

5—8 Self-induction in a Coil75

5—9 Mutual Induction77

6．ALTERNATING CURRENT79

6—1 Generation of an Alternating EMF81

6—2 Alternating Current83

6—4 Electrical Degrees:A Measure of Time84

6—3 Cycle;Frequency84

6—5 Effective Values of Alternating Current and EMF86

6—6 Average Value of Alternating EMFs and Currents87

6—7 Phase Relations88

6—8 Phasor(Vector)Diagrams90

6—11 Properties of an Electric Circuit90

6—9 Addition of Phasors93

6—10 Substraction of Phasors98

6—12 Resistance in an AC Circuit100

6—13 Inductance101

6—14 Inductive Reactance102

6—15 Capacitors105

6—17 Capacitors in Parallel108

6—16 Capacitors in Series108

6—18 Action of a Capacitor in an AC Circuit109

6—19 Capacitive Reactance110

6—20 Reactance112

6—21 Impedance112

6—22 Graphical Representation of Resistance,Reactance,and Impedance114

6—23 Complex Quantity Notation for Phasor Representation116

7．SINGLE-PHASE CIRCUITS124

7—1 Power and Power Factor124

7—2 Current and Voltage Relations in SeriesCircuits127

7—3 Resistance and Inductance in Series128

7—4 Resistance and Capacitance in Series130

7—5 Resistance,Inductance,and Capacitance in Series132

7—6 Impedance in Series134

7—7 Series Resonance135

7—8 Parallel Circuits137

7—9 Parallel Resonance141

7—10 Power-Factor Correction142

8．THREE-PHASE CIRCUITS145

8—1 Reasons for Use of Three-phase Circuits145

8—2 Generation of Three-phase Voltages146

8—3 Voltage Relations in a Wye-connected Gen-erator147

8—4 Current Relations in a Wye-connected Generator150

8—5 Voltage Relations in a Delta-connected Generator150

8—6 Current Relations in a Delta-connected Generator151

8—7 Three-phase Power152

8—8 Wye-and Delta-connected Loads154

9．ELECTRICAL INSTRUMENTS AND ELECTRI-CAL MEASUREMENTS158

9—1 Galvanometers159

9—2 The Permanent-Magnet Moving-Coil Instrument161

9—3 DC Voltmeters164

9—4 DC Ammeters164

9—5 Moving-Iron Vane Instruments166

9—6 Electrodynamometer Voltmeters and Ammeters168

9—7 Power Measurements170

9—8 The Varmeter174

9—9 Energy Measurements in AC Circuits175

9—10 Power-Factor Meter179

9—11 Phase-Angle Meters180

9—12 Measuremcnt of Resistance:Voltmeter-Am-meter Method182

9—13 Wheatstone Bridge184

9—14 Insulation Resistance187

9—15 Measurement of Resistance:Voltmcter Method188

9—16 The Megger Insulation Tester190

9—17 The Ohmmeter194

1．电学单位196

参考译文196

2．基本单位200

2-1 物质结构201

2-2　电流203

2-3　电流单位：安培203

2-4　电阻：欧姆204

2-5　电势差和电动势：伏特205

2-6　电流、电压和电阻的测量207

3．直流电路208

3-1　串联电路：电流的关系208

3-2　串联电路：电压的关系209

3-3　并联电路：电压的关系210

3-5　欧姆定律211

3-4　并联电路：电流的关系211

3-6　欧姆定律的运用213

3-7　串联电路里的电阻215

3-8　并联电路里的电阻215

3-9　串并联电路218

3-10　电阻的温度系数220

3-11　线路电压降221

3-12　基尔霍夫定律223

3-13　功224

3-14　能224

3-15　机械功率225

3-16　电功率226

3-17　电功和电能228

3-18　电功率和电能的量测230

3-19　线路损耗231

3-20　三线配电线路232

4．磁235

4-1　磁铁和磁性材料235

4-2　磁场和磁力线236

4-3　磁吸引和磁推斥237

4-4　磁的特性238

4-5　载流导线周围的磁场239

4-6　线圈周围的磁场240

4-7　磁动势240

4-8 电磁铁241

4-9　饱和242

5．电磁感应243

5-1　感应电动势243

5-3　法拉第感应定律244

5-2　影响感应电动势数值的诸因素244

5-4　感应电动势的数值245

5-5　感应电动势的方向245

5-6　楞兹感应定律246

5-7　自感电动势：电感246

5-8　线圈的自感247

5-9　互感248

6．交流电250

6-1　交流电动势的产生251

6-2　交流电252

6-3　周期；频率253

6-4　电角度：时间的一种度量单位253

6-5　交变电流和电动势的有效值254

6-7　相位关系255

6-6　交流电动势和电流的平均值255

6-8　相矢量（矢量）图256

6-9　相矢量的相加258

6-10　相矢量的相减262

6-11　电路的参量263

6-12　交流电路里的电阻263

61-3　电感264

6-14 感抗264

6-15　电容器267

6-16　串联电容器269

6-17　并联电容器269

6-18　电容器在交流电路里的作用269

6-19　容抗270

6-20　电抗271

6-21 阻抗272

6-22　电阻、电抗和阻抗的图示法273

6-23　相矢量的复数表示法274

7．单相电路280

7-1　功率和功率因数280

7-2　串联电路里电流和电压的关系282

7-3 电阻和电感的串联283

7-4　电阻和电容的串联285

7-5　电阻、电感和电容的串联286

7-6　串联阻抗287

7-7　串联谐振288

7-8　并联电路289

7-9　并联谐振293

7-10　功率因数补偿293

8-1　采用三相电路的原因295

8．三相电路295

8-2　三相电压的产生296

8-3　星形连接发电机的电压关系296

8-4　星接发电机里的电流关系298

8-5　三角形连接发电机里的电压关系298

8-6　三角形接法发电机里的电流关系299

8-7　三相功率299

8-8　星接和三角接法负载302

9．电测仪表和电测量305

9-1　检流计305

9-2　永磁动圈式仪表306

9-3 流伏特计307

9-4　直流安培计308

9-5　动铁叶片式仪表309

9-6 电动力式伏特计和安培计310

9-7　功率量测311

9-8　无功伏安计312

9-9　交流电路里能量的量测313

9-10　功率因数计315

9-11　相角计316

9-12 电阻的量测：伏特计-安培计法317

9-13　惠斯顿电桥318

9-14　绝缘电阻319

9-15　电阻的量测：伏特计法320

9-16　兆欧计321

9-17　欧姆计323

总词汇表324