xii ' CONTENTS 



PAGE 



I. CONDITIONS OF ELECTRIC-CURRENT SUPPLY TO ROTARY 



CONVERTERS 177 



Fundamental Diagram Fundamental Equation Application of the 

 Diagram. Representation of Converter Operation with Constant 

 Potential at Primary Terminals and at Brushes General Case. Reactive 

 Current Values for a Given Vdltage Variation as a Function of the 

 Load Most Suitable Value of Current-Supply Voltage Most Suitable 

 Value of Reactance Regulation of Voltage at Terminals by Variation 

 of the Supply E.M.F. Regulation of Voltage at Terminals by Variation 

 of Reactance Power-Factor of the Generator. 



CHAPTER IT. PREDETERMINATION OF THE FIELD EXCITATION 



OF ROTARY CONVERTERS 194 



Characteristic Features of the Rotary Converter Compound- 

 Excitation. Different Factors of this Excitation Determination of 

 Reactive Current as a Function of the Excitation when the Active Current 

 is Constant, then when the Power is Constant, the Generator E.M.F. 

 being always Constant Different Values of the Excitation, with Con- 

 stant Power and Constant Potential. V-Curves for Constant Potential 

 Upper Limit of Reactive Current Lag-Characteristics of Rotary Con- 

 verters at Constant Potential Effective Characteristic of Rotary Con- 

 verter under Load Application in the Case of Separate Excitation 

 Application to the General Case of Self-Excitation Regulation of 

 Supply E.M.F. by Compounding of the Generator Regulation of 

 Voltage by Varying the Reactance X in the Circuit Possibility of 

 Suppressing the Shunt-Winding Conclusion. 



CHAPTER III. STABILITY OF OPERATION OF ROTARY CON- 

 VERTERS 213 



CHAPTER IV. OPERATION OF SEVERAL ROTARY CONVERTERS IN 



PARALLEL 219 



Inherent Oscillations or Pumping of Converters Connected in Parallel 

 Use of Rotary Converters for Transforming Direct into Alternating 

 Current Other Special Applications of Converters Phase-Converters. 



CHAPTER V. VOLTAGE RATIO IN SYNCHRONOUS CONVERTERS 

 WITH SPECIAL REFERENCE TO THE SPLIT-POLE CON- 

 VERTER 225 



