Fractional and subfractional horsepower electric motors : available types, basic operating principles, selection, and maintenance

목차 (Table of Contents)

• CONTENTS
• List of Tables = xxiii
• Preface = xxv
• Chapter 1 THE STORY BEHIND THE NAMEPLATE = 1
• 1.1 Fractional and Subfractional Horsepower Motors = 2
• 1.2 Manufacturer = 2
• 1.3 CSA Monogram = 2
• 1.4 Thermally Protected = 2
• 1.5 Type and Application = 3
• 1.6 Model Number = 17
• 1.7 Horsepovwer = 17
• 1.8 RPM = 18
• 1.9 Volts = 19
• 1.10 Amperes = 20
• 1.11 Frame = 21
• 1.12 Hartz(Frequenev) = 21
• 1.13 AC = 22
• 1.14 Phases = 22
• 1.15 KVA Code = 25
• 1.16 Insulation Class = 25
• 1.17 Maximum Ambient = 25
• 1.18 Duty = 26
• 1.19 Service Factor = 27
• 1.20 Service Factor Amperes = 27
• 1.21 Bearing = 27
• 1.22 Motor Reference = 27
• 1.23 Date Code = 28
• 1.24 Other Information an the Nameplate = 28
• 1.25 Mirror-Image UR = 28
• 1.26 lmpedance-Protected = 28
• 1.27 Nameplate Materials = 28
• Chapter 2 WHAT MAKES AN INDUCTION MOTOR RUN? = 30
• 2.1 Single-Phase and PolVphase Motors = 30
• 2.2 Rotation of a Copper Disk Produced by a Rotating Magnet = 32
• 2.3 Rotation of a Squirrel-Cage Rotor Produced by a Rotating Field Magnet = 33
• Production of a Rotating Field in a Two-Phase Stator = 34
• 2.4 A Simple Two-Phase Motor-and-Generator System = 34
• 2.5 Windings of a Two-Phase Motor = 35
• 2.6 Now the Rotating Field Is Set Up = 36
• 2.7 Conditions Necessary To Set Up a Rotating Field in a Two- Phase Motor = 38
• Production of a Rotating Field in a Sinale-Phase Induction Motor = 39
• 2.8 The Single-Phase Motor : A Special Case of the Two-Phase Motor = 39
• 2.9 Field Set Up by Stator Winding Alone = 39
• 2.10 Field Set Up by the Rotor = 39
• 2.11 Rotating Field = 41
• Comparisons between Single-Phase and Polyphase Induction Motors = 42
• 2.12 Differences in the Rotating Field = 42
• 2.13 Losses, Breakdown Torque, and Torque Pulsations = 43
• 2.14 Necessity for Starting Arrangement for Single-Phase Induction Motors = 43
• Miscellaneous = 43
• 2.15 Number of Poles = 43
• 2.16 Electrical Degrees = 44
• 2.17 Synchronous Speed = 44
• 2.18 References for Further Study of Induction-Motor Theory = 44
• Chapter 3 SINGLE-PHASE INDUCTION MOTOR WINDINGS AND CONNECTIONS = 47
• 3.1 Concentric Winding = 47
• 3.2 Necessity for Different Types of Connection Diagrams = 49
• 3.3 Distribution Chart = 50
• 3.4 A Stator (or Rotor) Connection Diagram = 50
• 3.5 Wiring Diagram = 52
• 3.6 Line Connection Diagram = 512
• 3.7 Magnetic Polarity = 52
• 3.8 Gun Windings = 53
• 3.9 Machine Windings = 54
• 3.10 Mold Windings = 54
• 3.11 Skein Windings = 56
• 3.12 Windings with Dissimilar Coils and Consequent-Pole Windings = 57
• 3.13 Some Practical Hints an Winding = 58
• 3.14 Varnish Impregnation = 59
• 3.15 Repetitive Surge Tests = 60
• 3.16 Dielectric Withstand Test = 61
• 3.17 Leakage Current = 61
• Chapter 4 SPLIT-PHASE INDUCTION MOTORS = 63
• 4.1 Split-Phase Motor Defined = 63
• 4.2 Essential Parts of a Split-Phase Motor = 64
• 4.3 Split-Phase Starting Principle = 64
• 4.4 Purpose of the Starting Switch = 66
• 4.5 Standard and Special-Servic, Mtors = 67
• 4.6 Torque Characteristics of Split-Phase Motor, = 68
• Connection Diagrams for Split-Phase Motor Windings = 68
• 4.7 Motor Connections and Terminal Markings = 68
• 4.8 Now To Tell the Windings Apart and Now To Identify the Leads = 70
• Common Winding Connection, = 70
• 4.9 Both Windings Series-Conn,cted = 71
• 4.10 Parallel-Connected Main Winding and Series-Connected Auxiliary Winding = 72
• 4.11 Both Windings Parallel and Cross-Connected = 73
• 4.12 "Short-Throw" and "Long-Throw" Connections = 73
• 4.13 Switch in Center of Auxiliary Winding = 74
• 4.14 Motors with Direction-Connection Plug = 74
• 4.15 Connecting Motor Windings for a Definite Direction of Rotation = 75
• 4.16 Predetermining Direction of Rotation = 75
• 4.17 Nonreversible Motor with One Line Lead on the Starting Switch = 77
• 4.18 Motor with Card and Plug and Built-in Line Switch = 77
• Thermally Protected Motor, = 77
• 4.19 Reversible : Five or Six Line Leads = 78
• 4.20 Nonreversible : Two Line Leads = 78
• 4.21 Motors with Terminal Board = 78
• 4.22 Heating Coil of Thermal Prtector in Auxiliary Phase Only = 79
• Two-Speed Motors = 79
• 4.23 Two-Speed Pole-Changing Motors = 79
• 4.24 Consequent-Pole Windings = 80
• 4.25 Two-Speed Pole-Changing Four-Winding Motars = 81
• 4.26 Two-Speed Pole-Changing Three-Winding Motors = 82
• Home-LaundrV Motors = 82
• 4.27 Single-Speed Home-LaundrV Motors = 83
• 4.28 Twa-Speed Home-Laundry Motors = 84
• 4.29 Laundry Motors with Auxiliary Terminals = 85
• Miscellaneous Arrangements = 86
• 4.30 Resistance-Start Split-Phaso Motor = 86
• 4.31 Reactor-Start Motor = 86
• 4.32 Dual-Voltage Motors = 87
• 4.33 Motors with Magnetically Operated Switch = 87
• 4.34 Reverse Turns in the Auxiliary Phase = 87
• Miscellaneous Service Problems = 88
• 4.35 Haw To Reverse the Various Types of Motors = 88
• 4.36 Rewinding or Reconnecting Motor for a Different Voltage and the Same Performance = 88
• 4.37 Rewinding for Different Torques at the Samo, Voltage = 89
• 4.38 Rewinding for a Different Frequency = 90
• 4.39 Use of a Capacitor in the Auxiliary Phase To Raise Locked-Rotor Torque or To Reduce Locked-Rator Current = 90
• 4.40 Thermal Protection = 91
• 4.41 Distribution Factor and Effective Conductors = 92
• Chapter 5 CAPACITOR-START MOTORS = 95
• 5.1 Capacitor Motor Types Defined = 95
• 5.2 Essential Parts of a Capacitor-Start Motor = 96
• 5.3 Capacitor-Starting Principle = 97
• 5.4 Capacitor Starting Compared with Split-Phase Starting = 99
• 5.5 Purpose of the Starting Switch = 100
• 5.6 Torque Characteristics of Capacitor-Start Motors = 1011
• General-Purpose Single-Voltage Motors
• 5.7 Terminal Boards and Integral Conduit Boxes = 101
• 5.8 Single-Voltage Motors : Without Thermal Protection = 101
• 5.9 Single-Voltage Motors : Thermally Protected = 103
• 5.10 Stator Connection Diagrams = 104
• Dual-Voltage Motors = 105
• 5.11 Reasons for Ouni-Voltege Windings = 105
• 5.12 Elementary Principles Involved = 105
• 5.13 Winding Dual-Voltage Motors = 106
• 5.14 Dual-Voltage Motors : Without Thermal Protection = 108
• 5.15 Thermal Protection of Dual-Voltage Motors = 108
• 3.16 Dual-Voltage Motors : Thermally Protected = 110
• 5.17 Stator Connection Diagrams for Dual-Voltege Motors = 114
• Miscellaneous Arrangements = 114
• 5.18 "Swing" Connection (Half-Voltage Starting Winding) = 114
• 5.19 Two-Speed Pole-Changing Motors = 1115
• 5.20 Motors with Magnetically Operated Switch = 116
• 5.21 Reversing Motors = 117
• Miscellaneous Service Problems = 118
• 5.22 Rewinding or Reconnecting Motor for a Different Voltage and Same Performance = 118
• 5.23 Rewinding for Different Torques = 1119
• 5.24 Rewinding for a Different Frequency = 120
• 5.25 Changing a Capacitor-Start Motor to a Split-Phase Motor = 120
• 5.26 Thermal Protection = 121
• 5.27 Regeneration in Capacitor-Start Motors = 121
• Chapter 6 TWO-VALUE CAPACITOR MOTORS = 125
• 6.1 Two-Value Capacitor Motor Defined = 125
• 6.2 Essential Parts of the Two-Value Motor = 126
• 6.3 Effect of the Running Capacitor = 127
• 6.4 Purpose of the Starting Switch = 128
• 6.5 Torques of Two-Value Capacitor Motors = 129
• Singl-Voltage Motors = 129
• 6.6 Standard Connections for Reversible Motors = 129
• 6.7 Motor with Dual-Section Auxiliary Winding = 129
• Dual-Voltage Motors = 131
• 6.8 Dual-Voltage Motors with Single-Section Auxiliary Winding = 132
• 6.9 Dual-Voltage Motors with Two-Section Auxiliary Winding = 132
• Miscellaneous Service Problems = 132
• 6.10 Rewinding or Reconnecting Motor for a Different Voltage but for Same Performance = 132
• 6.11 Rewinding for Different Torques, Speed, or Frequency = 133
• B.12 Changing a Two-Value Motor to a Capacitor-Start Motor = 133
• Chapter 7 PERMANENT-SPLIT AND SPLIT-PHASE CAPACITOR MOTORS = 137
• 7.1 Permanent-Sprit Capacitor Motor Defined = 138
• 7.2 Essential Parts of a Permanent-Split Capacitor Motor = 138
• 7.3 Principles of Operation = 139
• Single-Speed Motors = 139
• 7.4 Performance Characteristics of Permanent-Split Capacitor Motors = 139
• 7.5 Connections and Diagrams : Single-Voltage Motors = 140
• 7.6 Connections and Diagrams : Dual-Voltage Motors = 141
• 7.7 Rewinding a Permanent-Split Capacitor Motor for a Different Voltage = 142
• Speed-Control Methods for Permanent-Split Capacitor Motors = 143
• 7.8 Basic Methods of Speed Control = 144
• 7.9 Fundamental Relationships between Slip, Field Strength, and Torque = 144
• 7.10 Speed Control by Means of Field Strength Control = 145
• 7.11 Limitations of Field-Strength Systems of Speed Control = 146
• Multispeed Motors = 146
• 7.12 Motors for Adjustable-Speed Operation = 146
• 7.13 External Impedance Control = 147
• 7.14 Three Kinds of Tapped-Winding Arrangements = 147
• 7.15 Connection Diagrams for Tapped-Winding Motors = 152
• 7.16 Special Mechanical Features of Fan Motors = 154
• 7.17 Direct-Drive Blower Motors = ⅰ55
• 7.18 Coiling Fan Motors = 155
• 7.19 Reversing, High-Torque, Intermittent-Rated Motors = 158
• 7.20 Shifted Auxiliary Winding = 159
• 7.21 Rewinding or Reconnecting = 159
• 7.22 Changing Capacitor = 159
• Split-Phase Capacitor Motors = 159
• 7.23 Split-Phase Capacitor Motor Defined = 159
• 7.24 Essential Parts of a Split-Phase Capacitor Motor = 160
• Chapter 6 CAPACITORS = 162
• AC Electrolytic Capacitors = 162
• 8.1 Construction = 162
• 8.2 Characteristics of Motor-Starting Capacitors = 164
• 8.3 When Replacing Electrolytic Capacitors = 166
• 8.4 Testing Electrolytic Capacitors = 166
• 8.5 Causes of Failure = 168
• B.6 Mounting Means = 168
• AC Fixed-Paper Dielectric Oil Capacitors = 169
• 8.7 Construction = 169
• B.8 Characteristics of Motor-Run Capacitors = 169
• 8.9 When Replacing Oil-Filled Capacitors = 171
• 8.10 Pressure-Sensitive Interrupter = 171
• 8.11 Polypropylene Dielectric = 172
• Chapter 9 SHADED-POLE MOTORS = 175
• Basic Principles of Operation = 176
• 9.1 Shaded-Pole Motor Defined = 176
• 9.2 Essential Parts of a Shaded-Pole Motor = 176
• 9.3 Principle of the Shaded-Pole Motor = 177
• 9.4 Action of a Simple Shading Coil Explained = 179
• 9.5 Use of Magnetic Wedges or Bridges = 179
• 9.6 Use of a Reluctance Effect in the Leading Pole Tip = 180
• 9.7 Ratings, Performance, and Torque Characteristics = 182
• 9.8 Variations in the Operating Speed = 183
• Unidirectional (Fixed-Rotation) Motors = 184
• 9.9 Single-Speed Motors = 184
• 9.10 Multispead Motors = 186
• Reversible Motors = 187
• 9.11 Use of Two Motors in Tandem = 187
• 9.12 Use of Two Wound Shading Coils per Pole = 189
• 9.13 Production of a Space-Ouadratum Field with Wound Shading Coils = 190
• 9.14 Versatility of the Motor with Four Shading Coils = 191
• Miscellaneous = 193
• 9.15 Geared Motors = 193
• 9.16 Battery-Operated Shaded-Pole Motor System = 193
• 9.17 Shaded-Pole Ceiling-Fan Motors = 193
• 9.18 How To Determine Direction of Rotation = 194
• 9.19 Rewinding or Reconnecting Motor for a Different Voltage and the Same Performance = 195
• Chapter 10 SYNCHRONOUS MOTORS = 197
• 10.1 General = 197
• 10.2 Types of Synchronous Motors = 198
• Reluctance Meters = 198
• 10.3 Reluctance Motor Definitions = 198
• 10.4 Construction and Principles of Operation = 199
• 10.5 Polyphase Reluctance Motors = 202
• 10.6 Split-Phase Reluctance Motors = 203
• 10.7 capacitor-Type Reluctance Motors = 203
• 10.8 Shaded-Pole Reluctance Motors = 204
• 10.9 Making a Synchronous Motor in the Repair Shop = 205
• Hysteresis Motors = 206
• 10.10 Hysteresis Motor Defined = 206
• 10.11 Construction = 206
• 10.12 Polyphase Hysteresis Motors = 208
• 10.13 Capacitor-Type Hysteresis Motors = 209
• 10.14 Multispeed Hysteresis Motors = 211
• Permanent-Magnet Motors = 211
• 10.15 Permanent-Magnet Synchronous Motor Defined = 211
• 10.16 Construction = 212
• 10.17 Performance Characteristics = 212
• Inductor Motors = 213
• 10.18 Construction : "50-Frame" Motors = 213
• 10.19 Principles of Operation = 213
• 10.20 Characteristics and Applications = 216
• 10.21 A Small Synchronous Inductor Motor = 217
• Timing Motors = 218
• 10.22 Multipolar Shaded-Pole Hysteresis Motor with a Single Stator Coil = 219
• 10.23 Multipolar Capacitor Hysteresis Motor with Only Two Stator Coils = 219
• 10.24 Inductor-Type Timing Motors = 220
• Chapter 11 UNIVERSAL MOTORS = 221
• 11.1 Universal Motor Defined = 222
• 11.2 Application and Torque Characteristics = 222
• 11.3 Essential Parts of the Universal Motor = 224
• Principles of Operation = 225
• 11.4 Operation on Direct Current = 225
• 11.5 Operation on Alternating Current = 226
• 11.6 Compensated Universal Motors = 227
• Stator Windings = 229
• 11.7 Concentrated-Pole Noncompensated Motors = 229
• 11.8 Split-Series Electrically Reversible (Reversing) Motors = 230
• 11.9 Tapped-Field Winding = 231
• 11.10 Two-Field Compensated Windings = 231
• 11.11 Two-Field Compensated Split-Series Windings = 231
• 11.12 Single-Field Compensated Motor = 232
• Armature Windings = 233
• 11.13 General = 233
• 11.14 Front-Lead Windings = 233
• 11.15 Back-Lead Windings = 234
• 11.16 Notes an Rewinding and Reconnecting = 235
• 11.17 Refinishing the Commutator = 236
• 11.18 Checking the Rewound Armature = 237
• Speed Central of Universal Motors = 237
• 11.19 By a Mechanical Governor = 237
• 11.20 By an External Impedance = 238
• 11.21 By a Solid-State Electronic Controller = 238
• Miscellaneous Service Problems = 240
• 11.22 Setting or Checking Neutral = 240
• 11.23 Rewinding for Different Characteristics = 240
• Chapter 12 DC MOTORS = 242
• 12.1 Types of DC Motors = 242
• 12.2 Essential Parts of a DC Motor = 243
• Principles of Operation = 244
• 12.3 Basic Principles Common to All Types = 244
• 12.4 How the Shunt Motor Works = 247
• 12.5 How the Compound Motor Works = 248
• 12.6 How the Series Motor Works = 249
• Application Characteristics = 250
• 12.7 Ratings = 250
• 12.8 Operating Characteristics = 250
• 12.9 Standard Terminal Markings = 251
• Special-Purpose Motors = 252
• 12.10 Split-Series Motors = 253
• 12.11 Military-Service Motors = 253
• 12.12 Electrically Reversible (Reversing) Motors = 254
• 12.i3 Two-Speed Motors = 255
• 12.14 Traction Motors = 256
• Permanent-Magnet Motors = 256
• 12.15 Permanent-Magnet Motor Defined = 256
• 12.16 Construction of a Permanent-Magnet Motor = 257
• 12.17 Ratings, Performance, and Torque Characteristics = 258
• 12.18 Timing Motors = 258
• 12.19 Brushiess DC Motors = 261
• Service Problems = 265
• 12.20 Armature Windings = 265
• 12.21 How To Change the Speed without Rewinding = 265
• 12.22 How To Reverse a DC Motor = 266
• 12.23 Finding the Neutral Position = 266
• 12.24 Brushes = 266
• Chapter 13 VARIABLE-SPEED DRIVE SYSTEMS = 268
• Vstems Using a DC Drive Motor = 268
• 13.1 The Ward Leonard System = 269
• 13.2 Simple Rectifiers = 271
• 13.3 Single-Phase Controlled Rectifiers = 272
• 13.4 Form Factor = 274
• 13.5 Operation of DC Motors on Rectified Alternating Current = 274
• 13.6 DC Motors Intended for Use on Adjustable-Voltage Electronic Power Supplies = 275
• 13.7 Variable-Speed Systems Using Electronic Power Conversion = 276
• Systems Using an AC Drive Motor = 278
• 13.8 Triac = 279
• 13.9 Inverter = 280
• Chapter 14 POLYPHASE INDUCTION MOTORS = 283
• 14.1 Essential Parts of a Polyphase Induction Motor = 284
• 14.2 Principles and Characteristics of the PolVphose Induction Motor = 284
• Windings and Connections = 285
• 14.3 Lap Winding for Polyphass Motors = 283
• 14.4 Number of Groups and Number of Coils per Group = 286
• 14.5 "Throw-Up" and "Throw-Down" Windings = 287
• 14.6 Short-Throw and Long-Throw Connections = 288
• 14.7 Stator (or Rotor) Connection Diagrams : Single-Voltage and Three-Phase = 289
• 14.8 How To Check a Diagram or Winding = 290
• 14.9 Windings with Unequal Coil Grouping = 291
• 14.10 Irregular Lap Windings = 292
• 14-11 Dual-Voltage Motors = 292
• 14-12 Effective Series Conductors per Phase = 292
• 14-13 Machine-Wound Concentric Windings = 295
• Thermally Protected Motors = 297
• 14.14 Single-Voltage Motors = 297
• 14.15 Dual-Voltage Motors = 299
• Miscellaneous Service Problems = 299
• 14.16 Rewinding or Reconnecting PolVpha5e Motors = 299
• 14.i7 Operation of a Three-Phase Motor an an Unbalanced Voltage Supply = 300
• Chapter 15 STEPPER MOTORS = 302
• 15.1 Stopper Motor Defined = 302
• 15.2 Types of Stepper Motors = 303
• 15-3 Stopper Motor Terminology = 303
• Shaded-Pole Stopper Motors = 305
• 15.4 Unidirectional Motors = 305
• 15.5 Bidirectional Motors = 306
• Permanent-Magnet Stopper Motors with Two-Phase Windings = 306
• 15.6 SLO-SYN Stepper Motors = 307
• 15.7 Hayden Stepper Motors = 312
• 15.8 Airpax Permanent-Magnet Stopper Motors = 312
• Variable-Reluctance Stopper Motors = 314
• 15.S Principle of the Variable-Reluctance Stepper Motor = 314
• 15.10 Kearfott Variable-Reluctance Stepper Motors = 315
• Chapter 116 SERVOMOTORS = 317
• Standard Low-inertia AC Servomotors = 317
• 16.1 AC Servomotor Defined = 317
• 16.2 Essential Parts of a Servomotor = 318
• 16.3 Principles of Operation = 318
• 16.4 Certain Performance Characteristics Explained = 319
• 16.5 Performance Characteristics of Standard Servomotors = 321
• 16.6 Wiring Diagrams and Terminal Markings = 321
• 16.7 Drag-Cup Servomotors = 323
• Damped AC Servomotors = 324
• 16.8 Damping and Why It Is Needed = 324
• 16.9 Internal Damping of a Servomotor = 328
• 16.10 Viscous-Damped Servemators = 327
• 16.11 Inertial-Damped Servomotors = 327
• 16.12 Tachometer Damping = 328
• DC Servomotors = 329
• 16.13 Printed-Circuit Motors = 329
• 16.14 Motors with Surface-Wound Armatures = 330
• 16.15 Moving-Coil Motors = 330
• Chapter 17 GENERAL CONSTRUCTIONAL FEATURES = 333
• Bearings = 333
• 17.1 Sleeve Bearings : Constructions = 333
• 17.2 Sleeve Bearings : Service and Maintenance = 337
• 17.3 Ball Bearings : Construction = 339
• 17.4 Ball Bearings : Service and Maintenance = 341
• Starting Switches = 342
• 17.5 Centrifugal Starting Switch : General = 342
• 17.6 Emerson Starting Switch = 343
• 17.7 Other Starting Switches = 344
• 17.8 Service and Maintenance of Centrifugal Switches = 345
• 17.9 Magnetic Starting Relays = 348
• Electronic Starting Switches = 349
• 17.10 Franklin's Reed-Trinc Switch = 349
• 17.11 Century Solid-State Switch = 350
• Rigid and Resilient Mountings and Couplings = 350
• 17.12 Types of Mounting = 351
• 17.13 Torque Pulsations in Single-Phase Motors = 351
• 17.14 How Resilient Mounting Eliminates Noise Due to Torque Pulsations = 353
• 17.l5 Flexible Couplings = 354
• Thermal Protectors = 356
• 17.16 General : Definitions = 356
• 17.17 Underwriters Laboratories Standards for Thermal Protectors = 357
• 17.18 Essential Parts of a Thermal Protector = 358
• 17.19 Elementary Principles of Operation of Thermal Protecters = 360
• 17.20 Thermal Protectors for Single-Phase Motors = 363
• 17.21 Thermal Protectors for Throe-Phase Motors = 366
• Gearmotors = 366
• 17.22 Fractional Horsepower Gearmotors = 367
• 17.23 Gear Reducers for Fractional Horsepower Motors = 369
• 17.24 Subf Factional Horsepower Gearmotars = 370
• Chapter 18 TEST EQUIPMENT AND PROCEDURES = 373
• Meters and Equipment = 373
• 18.1 Power Source = 373
• 18.2 Measurement of Voltage = 375
• 18.3 Measurement of Current = 376
• 18.4 Measurement of Power Input (Watts) = 376
• 18.5 Measurement of Power Factor = 376
• 18.6 Measurement of Frequency = 377
• 18.7 Measurement of Speed = 377
• 18.8 Measurement of Speep = 378
• 18.9 Measurement of Resistance = 379
• 18.10 Measurement of Temperature = 379
• 18.11 Meter Loss Corrections = 380
• 18.12 Meter Connections for Single-Phase Circuits = 381
• 18.13 Meter Connections for PolVphase Circuits = 381
• 18.14 Measurement of Mechanical Output = 382
• Tests to Take : Single-Phase Induction Motors = 386
• 18.15 Routine Test = 386
• 18.16 A Complete Engineering Test = 386
• Tests to Take : Other Types = 391
• 18.17 Adjustable Varying-Speed Fan-Duty Motors = 391
• 18.18 Polyphase Induction Motors = 391
• 18.19 DC Motors = 391
• 18.20 Universal Motors = 392
• 18.21 Synchronous Motors = 392
• 18.22 High-Potential Test (Dielectric Test) = 392
• Segregation ef Lasses = 394
• 18.23 Polyphase Induction Motors = 395
• 18.24 Single-Phase Induction Motors = 395
• 18.25 Capacitor-Run Motors = 397
• Vibration and Noise Measurements = 398
• 18.26 Vibration Measurement = 398
• 18.27 Nature of Sound : Certain Terms Explained = 399
• 18.28 Instrumentation and Noise Testing Procedures = 400
• Application Tests = 402
• 18.29 Determination of Power Requirements = 402
• 18.30 Determination of Torque Requirements = 402
• Chapter 19 SELECTING THE RIGHT MOTOR FOR THE JOB = 404
• Classification of Motors According to Application = 405
• 19.1 General-Purpose Motors = 405
• 19.2 Definite-Purpose Motors = 406
• 19.3 Special-Purpose Motors = 406
• 19.4 Standard Ratings and Performance = 406
• Electrical Considerations = 409
• 19.5 Selection of the Type = 409
• 19.6 What Full-Load Speed? = 411
• 19.7 Choosing the Horsepower Rating = 411
• 19.8 Torque Requirements of the Application = 415
• 19.9 Duty = 415
• Mechanical Considerations = 415
• 19.10 Enclosure and Method of Cooling = 415
• 19.11 Mounting Arrangements = 416
• l9.12 Bearing Constructions = 416
• 19.13 Shaft Extension = 416
• 19.14 Mechanical Drives = 416
• Definite-Purpose Motors = 417
• 19.15 Permanent-Split Industrial Instrument Capacitor Motors and Dearmotars = 417
• 19.16 Low-inertia Industrial Instrument Servomotors and Goarmotars = 418
• 19.17 Universal Motor Parts = 418
• 19.18 Motors for Hermetic Refrigeration Compressors = 418
• 19.19 Motors for Shaft-Mounted Fans and Blowers = 419
• 19.20 Motors for Bolted Fans and Blowers = 420
• 19.21 Motors for Air-onditioning Candensom and Evaporator Fans = 421
• 19.22 Motors for Collar Drainers and Sump Pumps = 421
• 19.23 Motors for Ga5Oline-Dispensing Pumps = 421
• 19.24 Motors for Domestic Oil Burners = 422
• 19.25 Motors for Home-Laundry Equipment = 423
• 19.26 Motors for Jet Pumps = 423
• 19.27 Motors for Carbonatur Pumps = 425
• 19.28 Motors for Coolant Pumps = 427
• 19.29 Submersible Motors for Deep-Well Pumps = 428
• 19.30 DC Motors for Use on Adjustable-Vaitage Electronic Power Supplies = 429
• Miscellaneous = 429
• 19.31 Service Conditions = 429
• 19.32 Effects of Variation of Voltage and Frequency on the Performance of Induction Motors = 430
• 19.33 Operation of 60-Hz Motors an 50 Hz = 430
• 19.34 Relationships between Power, Torque, and Speed = 430
• 19.35 Radio Interference and Suppression Devices = 431
• Appendix = 434
• Glossary = 454
• Index = 463