Transformers and Generators

The importance of transformers and generators is well known in the various engineering fields. The book provides comprehensive coverage of the various types of transformers d.c. generators and synchronous generators (alternators). The book starts with the brief review of single-phase transformer. It continues to discuss no load and on load performance of transformers phasor diagrams equivalent circuit voltage regulation and all-day efficiency of transformer. The detailed discussion of open and short circuit tests and predetermination of regulation and efficiency is also included in the book. The chapter on three phase transformer provides the detailed discussion of construction three phase transformer connections and phasor groups. The book also explains parallel operation of transformers tap changing transformer autotransformers cooling of transformers and three winding transformer. The various testing methods of transformers are also incorporated in the book. The book covers all the details of d.c. generators including construction armature reaction commutation characteristics and applications. The chapters on synchronous generators starts with the explanation of basics of synchronous generators including construction winding details e.m.f. equation and effect of harmonics on induced e.m.f. The book then explains the concept of armature reaction phasor diagrams regulation and various methods of finding the regulation of alternator. Stepwise explanation and simple techniques used to elaborate these methods is the feature of this book. The book further explains the concept of synchronization of alternators two reaction theory and parallel operation of alternators. The book uses plain lucid language to explain each topic. The book provides the logical method of explaining the various complicated topics and stepwise methods to make the understanding easy. Each chapter is well supported with necessary illustrations self-explanatory diagrams and variety of solved problems. The book explains the philosophy of the subject which makes the understanding of the concepts very clear and makes the subject more interesting.