292 



INDEX 



Cost, annual operating, saving in, 75 

 of equipment, saving in, 72 



Coupled synchronous motors, dia- 

 grams of, 1 66 



Crocker, Dr. F. B., 207 



Current-controllers, 109 

 limit-circle of, 37, 47 

 -minimum, existence of, 55 

 of synchronous motors, effect of, 



on distribution-systems, 64 

 -supply voltage, value of, 183 

 values, 182 



Curve of reaction curve, 61 



Curves, characteristic test, 132 



indicating power developed, 44 



D 



Damper of Hutin andLeblanc, 126 

 Damping circuits, 221 

 of oscillations, 126 

 Definition of synchronous motors, 



xvii 



Determining maximum power, 51 

 Determination of reactive current, 95, 



198 

 Determining the practical stability of 



synchronous motors, 51 

 Detroit Edison Co., on power-factors, 



288 

 Diagram, corrected, first application 



of, 95 



fundamental, 177 

 of ampere-turns in the case of 



unsaturated armature, 241 

 of E. M. F.'s and current of an 



alternator with unsaturated 



armature and with saturated 



field magnet, 239 

 of the first kind, applications of, 



35 



of the first kind, use of, 57 

 of the second kind, 40 

 transformations, 149 

 Diagrams, simplified, 104 

 Direct current, starting by, 106 

 Distributing system, economy of com- 

 pensation for, 80 



Distribution-systems, effect on of 

 current of synchronous 

 motors, 64 



-voltage, regulation of, 85 

 Dynamometer, Pronybrake method, 



134 

 torsion type, 137 



E 



Early types of synchronous motors, 



xviii 



Economy of compensation, for the dis- 

 tributing system, 80 

 Efficiency, measurement of, 134 

 Electric current supply to rotary con- 

 verters, 177 

 Elementary expansion of polyphase 



synchronous motors, 9 

 of single-phase synchronous 



motors, 14 

 E. M. F. diagrams, 150 



fluctuations in rotary converters, 



220 



regulation of supply by com- 

 pounding of the generator, 

 210 



Empirical coefficients, 255 

 Equal electromotive forces, case of, 5 



phase, lines of, 36, 47 

 Equation of the synchronous motor by 

 the method of complex vari- 

 ables, 23 



Equations of synchronous motors, 15 

 Equipment, saving in cost of, 72 



table, 76 



Excitation, different values of, 200 

 compound, 196 

 constant, lines of equal power 



occurring with, 36 

 of synchronous motors, 26 

 separate, 117 



application in case of, 206 

 Experimental properties, 5 



tests, 137 



Experiments at South Foreland, xvii 

 Expression for reactive current, 61 



