The chapter on "Voltage Regulation" is the crown jewel. He breaks down the MMF method, EMF method, and Potier triangle method so clearly that you won't need coaching classes.
: Techniques including change of voltage, frequency, poles, and EMF injection in the rotor circuit. Advanced Topics : Cogging, crawling, deep bar, and double cage rotors. sk kataria & sons Unit IV: Synchronous Generators (Alternators) Construction electrical machines 2 by j.b. gupta pdf
Reviews for J.B. Gupta’s machines textbooks are mixed, reflecting different study needs: Electrical Machines Jb Gupta - CLaME The chapter on "Voltage Regulation" is the crown jewel