PART III 



METHODS OF CALCULATION OF THE ARMATURE REAC- 

 TIONS (DIRECT AND TRANSVERSE) OF ALTERNATORS 



CHAPTER I 



METHODS OF CALCULATION OF THE ARMATURE REACTIONS 

 (DIRECT AND TRANSVERSE) OF ALTERNATORS l 



THE author here proposes to explain and complete the theory of 

 " two armature reactions," which was enunciated by him several 

 years ago, 2 and which has recently been adopted, with slight modi- 

 fications, by M. Rey, 3 M. R. V. Picou, 4 and M. Guilbert, 5 in France; 

 Professor Arnold 6 in Germany; and Mr. Herdt 7 and Messrs. Hobart 

 and Punga 8 in the United States. The notable authority of all these 



1 A paper by Prof. Andr6 Blondel, Ecole des Fonts el Chausees, presented 

 before the International Electrical Congress at St. Louis, in 1904. Reprinted 

 from the Transactions, Vol. I, pp. 635-668. 



2 "On the empirical theory of alternators, "L' 'Industrie Electrique, Nov. 10 

 and 25, 1899. This is the first publication in which the reaction in alternators 

 was analyzed, and possesses undisputable priority over all those which are men- 

 tioned below on the subject of the two reactions. 



8 M. Rey. Rapports, International Congress of Electricians, 1900. 



4 M. R. V. Picou. Bulletin de la Sociele Internationale des Electriciens 

 July, 1902. 



* C. F. Guilbert. Eclairage Electrique, March 7 and 14 and April, 1903, and 

 La Revue Technique, June, 1903. 



* E. Arnold. Elek. Zeit., 1902, page 250. Arnold, as pointed out farther on, 

 has reduced the generality of the method, in contradistinction to the other authors 

 mentioned. 



7 L. A. Herdt. Trans. Amer. Inst. El. Eng., May, 1902, and Eclairage Elec- 

 trique, February 14, 1903. 



8 Hobart and Punga. Trans. Amer. Inst. El. Eng., April 22, 1904. 



236 



