In the present edition, some material of the book has been reworded and rewritten so as to make the presentation easily comprehensible. More illustrative examples mainly from IAS, IES and GATE have been added and problem material with answers, at the end of each chapter, has been considerably enlarged With recent advances in power electronics and microelectronics, new electric machine types like brush less dc motors, variable-reluctance motors etc. are found in modern electric drive systems. Keeping these advances into consideration, new chapter 9, devoted to the discussion of brush less dc, variable-reluctance and stepping motors, is included in the book