None
Regulation Curves, 71-73 Field, A. B. on Eddy Current Losses in Copper Conductors, 168, 210 "Field Effect" for improving Start- ing Torque in Squirrel-cage In- duction Motors, 168; 210-212 INDEX 261 Field Excitation, 45 et seq. Calcula- tions for Synchronous Generator, 57,58 Field Spools, Design for Synchronous Generator, 84-92 Flux per Pole, Estimation of in Synchronous Generator, 18-22 Formula Circle Ratio, Kierstead's Formula for estimating, 152, 153 (for) Current in End Rings of Squirrel cage, 176 (for) Equivalent Radiating Surface at Air-gap, 181 Field Effect, 168 (for) Mean Length of Turn, 21, 156, 199 Output Coefficient, 6, 7, 108 Peripheral Speed, 113 Pressure Discussion leading up to Deriva- tion of, 13, 14 (for) Squirrel-cage Induction Motors, 119 Winding Pitch Factor in, 16, 20 Reactance, 48 Theta, 51 Total Works Cost, 111 Two-circuit Armature Winding, 197 Fractional Pitch Windings, 16-18 Friction Losses in Induction Motors, Data for esti- mating, 166 Synchronous Generators, 93-96; at high speeds, 99, 100 Full Load Power-factor, Estimation of, in Squirrel-cage Induction Motors, 155 Full Pitch Windings, 14-18; 120, 197 Generators Induction, see Induction Genera- tors Synchronous, see Synchronous Generators Synchronous versus Induction, 209, 210, 213 Goldschmidt, Dr. Rudolf, on Power- factors of Induction Motors, 202 Gross Core Length in Induction Generators, 218 Squirrel-cage Induction Motors, 108 Synchronous Generators, 6 Half-coiled Windings, 18-20; 41-43 I.E.E., see Institution of Electrical Engineers Ideal Short-circuit Current, 154; 200 Impedance, 76, 77 Inductance of Armature Windings of Synchronous Generators, 45-50; 53 Induction Generators, Design of, 1; 213-224 Derivation of Design from Design of Synchronous Generators, 216— 222 Speeds, Appropriateness for ex- ceedingly high, 213 Synchronous Generators versus, 209, 210, 213 Ventilating, Methods of, 220. 221 Induction Motors, 1 Slip Ring, 195-201 Squirrel-cage, Design of, 105 et seq. Magnetic End Rings, Use of, 206, 207 Open Protected Type, 186 Slip Ring, Discussion of the rela- tive merits of Squirrel-cage and, 195-201 Squirrel-cage Design, 173-178 Synchronous Motors versus, 202-212 Inherent Regulation, 44; 54; 55; 66; 71; 80-82 Institution of Electrical Engineers, Bibliography of papers on Poly- phase Generators, 246-251 — on Polyphase Motors, 252-255 Insulation (of) Field Spools, 88, 89 Lamination of Induction Motors, 126 Slot (in) Slip-ring Induction Motors, 196; 200 Squirrel-cage Induction Motors, 114; 128-130 Synchronous Generators, 10, 11 Kierstead's Formula for Circle Ratio, 152; 153 Lap Winding, 18; 19; 197 Leakage Factor, 22; 23; 42. See also Circle Ratio 262 INDEX Losses (in) Squirrel-cage Induction Motors, 155 et seq.; 166; 178 et seq. Synchronous Generator, 93-98 — Effect of High Speed on, 99-101 Magnet Core, Material and Shape suitable for 2500 kva. Synchro- nous Generator, 23-25 Magnet Yoke, Calculations for Syn- chronous Generator, 29 Magnetic Circuit Squirrel-cage Induction Motors Design, 120 et seq. Magnetomotive Force, Esti- mation of, 124; 134 Mean Length of, 121 Sketch, 137; 138 Synchronous Generators Design, 22 et seq. Magnetomotive Force, Esti- mation of, 32 et seq. Mean Length of, 31 Data for Teeth and Air-gap in In- duction Motors, 134 End Rings, Use of in Squirrel-cage Motors, 206; 207 Flux, 12 et seq. Distribution in Induction Mo- tors, 122-125 Estimation of Flux per Pole, for Synchronous Generators, 18- 22 Materials, Saturation Data of va- rious, 32; 33 Reluctance of Sheet Steel, 137 Magnetizing Current of Induction Motor, 139; 140 Magnetomotive Force Axes of Field and Armature, 45; 46 Induction Generator Calculations, 222 Induction Motor Calculations, 134 per Cm. for various Materials, Table, 33 Synchronous Generator Calcula- tions, 32 et seq, 54 Tabulated data of, 32; 34; 38; 42; 58; 61; 64; 65; 67; 69; 73; 74; 137 Mean Length of Magnetic Circuit in Induction Motors, 121 — in Synchronous Generators, 31 Turn of Winding, 21 in Slip-ring Induction Motors, 199 in Squirrel-cage Induction Mo- tors, 155-157 Metric Wire Table, Appendix, 257 Motors, Induction, see Induction Motors Motor is Transformer of Energy, 160 Net Core Length in Synchronous Generators, 26 No-load Current of Induction Motor, 140 Saturation Curves, 37-39 — In- fluence of Modifications in, 78- 83 Open Protected Type of Squirrel-cage Induction Motor, 186 Output Coefficient Formula, Discussion of Significance of, 6; 7 Squirrel-cage Induction Motors, Values for, 108; 109 Synchronous Generator, Table of Values for, 5; 6 Output from Rotor Conductors in Induction Motors, 167 Partly Distributed Windings, In- ductance Calculations, 48, 49 Peripheral Loading, Appropriate Val- ues f.or Squirrel-cage Induction Motors, 113-115 — for Synchro- nous Generators, 8 Peripheral Speed of Squirrel-cage Induction Motors, 113 Synchronous Generators, 25 Pitch Polar, see Polar Pitch Rotor Slot in Slip-ring Induction Motors, 196 Squirrel-cage Induction Motors, 174; 196 Slot, see Tooth Pitch Tooth, see Tooth Pitch (of) Windings, 16-18; 120; 197 INDEX 263 Polar Pitch, Suitable Values for Squirrel-cage Induction Motors, 106; 107 Synchronous Generators, 4; 5 Poles, Data for number of in Squirrel-cage Induction Motors, 106 Synchronous Generators, 3 Power-factor Curves, 192; 193 Efficiency, Dependence of on P.F. of Load, 97; 101; 102 Induction Motors versus Synchron- ous Motors, 202-212 Saturation Curves, Estimation of for various, 55 et seq Squirrel-cage Induction Motors, Estimation of, 115; 116; 155; 191-193 Pressure Formula Discussion leading up to deri- vation of, 13; 14 (for) Squirrel-cage Induction Motors, 119 Winding Pitch Factor in, 16; 120 Regulation, Method of Estimating, 39 et seq Total Internal of Synchronous Generator, 53 Radial Depth of Air-gap (for) Induction Motors, 133 Synchronous Generators, 36; 37 Radiating Surface at Air-gap, Data for Estimating, 181 Ratio of Transformation in Induction Generators, 217; 223 Slip-ring Induction Motors, 199 Squirrel-cage Induction Motors, 174 Reactance of Windings of Synchro- nous Generators, 48 Reactance Voltage, 53 — Determina- tion of Value for Synchronous Generators, 48-51 Regulation, Excitation for Synchro- nous Generators, 71-73 Resistance of Squirrel-cage Rotor, 167; 168; 194 Robinson, L. T., Skin Effect Investi- gation on Machine-steel Bars, 208; 209 Rotor (of) Induction Generators, 223; 224 C&nductors in, 214 et seq Slots in, 217 Slip-ring Induction Motor, Slot Pitch, 196 Slots, 195-197 Windings for, 195; 197-199 Squirrel-cage Induction Motor Conductors, Eddy Current Losses as affect- ing the Torque, 168; 169; 177; 192; 194 Output from, 167 Core Densities in, 135 Loss in, 158; 159; 164-166; 193; 194 Material for, Choice of; 158 Resistance, 167; 168 Slots Design of, 132 Number, 173 Pitch, 174; 196 Squirrel-cage, Design of, 173- 178 Salient Pole Generator, Calculations for 2500 kva., 3 et seq Derivation of Design for Induction Generator from; 216-222 Specification of, 40 see also Synchronous Generator Saturation Curves for Synchronous Generator, 55 et seq; 74 No-load Curves, 37-39— Influ- ence of Modifications of, 78-83 Data of various Magnetic Mate- rials, 32; 33 Sheet Steel, Magnetic Reluctance of 137 Short-circuit Curve for Synchronous Generators, 76-78 Sines, Table of, Appendix, 256 Single-layer Windings, 18 Skin Effect to improve Starting Torque of Synchronous Motors, 207-209 Slip, 106; 163; 164; 192; 194; 215 Slip-ring Induction Motor, Discus- sion of relative merits of Squirrel- cage and, 195-201 264 INDEX Slot-embedded Windings, Inductance and Reactance of, 48-50 Slot Insulation in Induction Motors, 114; 128- 130; 196; 200 Synchronous Generator, 10; 11 Pitch, see Tooth Pitch Space Factor, 11; 131 Tolerance, 127; 196 Slots Rotor, for Induction Generators, 217 Slip-ring Induction Motors, 195- 197 Squirrel-cage Induction Motors, 132; 141; 173; 174; 196 Stator, for Induction Generators, 217 Induction Motors, 117-119; 127; 131; 141 Synchronous Generators, 9; 11 Space Factor (of) Field Spools of Synchronous Gen- erators, 88; 89 Slot, 11; 131 Specification of 2500 kva. Synchro- nous Generator, 40; 41 Speed Control, Methods of providing, 195 Curves, 194 High-speed Sets, Characteristics of, 99 Synchronous versus Induction Mo- tors for Low and High, 202-212 Spiral Windings, 18-20 Spread of Winding, 14-16; 120 Spreading Coefficients, 36 Squirrel-cage Induction. Motor, see Induction Motor Starting Torque of Squirrel-cage Motor, 169-172 Stator Conductors, Determination of Di- mensions for Induction Motors, 127 Core of Induction Motors Density, 135 Loss, 158; 159 Material preferable for, 158 Weight of, Estimation, 159 Stator — Continued Core of — Continued Synchronous Generators, 27; 28 Weight, 92 Current Density suitable for Induc- tion Motors, 127; 128 PR Loss in Induction Motors, 155-157 Synchronous Generators, 93-96 Slot Pitch, Values for Induction Motors, 118 Slots in » Induction Generators, 217 Induction Motors, 119; 127; 131 Synchronous Generators, 11 Teeth, Data for Induction Motors, 121-127 Steam-turbine Driven Sets, Rotors with Distributed Field Windings for, 99 — Circulating Air Calcu- lations, 102-104 Step-down Transformers for small Motors, 114 Step-up Transformer for Induction Generator, 223 Synchronous Generators, 1 Distributed Field Winding Type, 99 et seq Efficiency, Dependence of on Power-factor of Load, 97; 101; 102 Induction Generator versus, 209; 210; 213 Salient Pole Type Calculations for 2500 kva., 3 et seq Derivation of Design for Induc- tion Generator from, 216- 222 Specification, 40; 41 Synchronous Motors, 1 — Induction Motors versus, 202-212 Tabulated Data of Magnetomotive Force Calculations, 32; 34; 38; 42; 58; 61; 64; 65; 67; 69; 73; 74; 137 Tabulation of Losses and Efficiencies in Squirrel- cage Induction Motors, 180 Squirrel-cage Induction Motor Di- ameters, 136 INDEX 265 Tabulation of — Continued Synchronous Generator Diameters, 28, 31: 37 Tangents, Table of, Appendix, 256 Teeth, Stator, in Induction Motors, 121-127 Temperature Rise, Data for estima- ting, 90; 181-183 Theta and its Significance, 51 et seq Thoroughly Distributed Windings, Inductance Calculations, 48; 49 Tooth Densities in Induction Motors, 121-125 Pitch 26; 118; 196 Torque, 162; 195 Eddy Current Losses in Rotor Conductors as affecting, 168; 169; 177; 192; 194 Starting (of) Squirrel-cage Induction Motor, 169-172 Synchronous Motors appropri- ate for high, 204 et seq Torque Factor, 167 Total Net Weight of Induction Motors, 110; 111 — Data for estimating, 185 Synchronous Generators, 7 Total Works Cost of Induction Motors, 158 — Methods of esti- mating, 111-113; 118 Transformers Auto, for starting up Induction Motors, 170 Step-down, for small Motors, 114 Step-up, for Induction Generators, 223 Two-layer Winding, 18; 197 Variable Losses in Synchronous Gen- erators, 94-96 Ventilating Ducts for Induction Motors, 125; 126 Synchronous Generators, 25; 26 Ventilation of Induction Generators, Methods suitable for, 220; 221 Synchronous Generators with Dis- tributed Field Windings, 102-104 Vibration, Critical Speed of, 224 Volt-ampere Curves, 75, 83 Voltage Formula, see Pressure Formula Regulation, Method of Estimating, 39 et seq Watts per Ton for Squirrel-cage Induction Motor, 183-186 Weight of Induction Motors, 110; 111; 183- 185 Stator Core of Induction Motors, 159 Synchronous Generators, 7 Whole-coiled Windings, 18-20 Winding Pitch, 16-18; 120; 197 Pitch Factor, 16; 120 Spreads, 14-16; 120 Inductance and Reactance of, 45- 49 Types of, 16-20; 41-43 Distributed Field, Polyphase Generators with, 99 et seq (for) Slip-ring Induction Motors, 197-199 Wire Table, Metric, Appendix, 257 • THIS BOOK IS DUE ON THE LAST BATE STAMPED BELOW AN INITIAL FINE OF 25 CENTS WILL BE ASSESSED FOR FAILURE TO RETURN THIS BOOK ON THE DATE DUE. - JUL 2 195T-P SEP 5 J.I) 21-20m-6,'32 YC 33501 257829. 