Direct Current Machines

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This book on 'Electrical Machines' has been written for students preparing for B.E./B.Tech, A.M.I.E. Section B, U.P.S.C., and other Competitive Examinations. It consists of two parts: Part I- deals with D.C. machines, and Part II- deals with A.C. machines and Polyphase circuits. Besides this, 'Additional Topics' and a 'Questions Bank' on 'Objective Type Questions' have been incorporated at the end of the book to make it a comprehensive unit in all respects.Salient Features:The presentation of the subject matter is very systematic and the language of text is lucid, direct and easy to understand.Each chapter of the book is saturated with much needed text supported by neat and self-explanatory diagrams to make the subject self-speaking to a great extent.A large number of solved examples, properly graded, have been added in various chapters to enable the students to attempt different types of questions in the examination without any difficulty.At the endof each chapter Highlights, Objective Type Questions, Theoretical Questions and Unsolved Examples have been added to make the book a complete and comprehensive unit. Table Of Contents : 0. Electromechanical Energy Conversion1. Direct Current Generators2. Armature Reaction and Commutation3. Direct Current Generator Characteristics4. Parallel Operation of D.C. Generators5. Direct Current Motor6. Speed Control of D.C. Motors7. Losses, Efficiency and Testing of D.C. Machines8. Special Types of D.C. Machines9. MiscellanyADDITIONAL TOPICS1. Special Types of D.C. Motors2. Electronic Control of D.C. Motors3. Eddy Current Drives4. Electronic Control of A.C. (Induction) Motors5. Synchronous Motors-Types, Starting, Speed Control and Braking6. Digital Control of Electric Motors7. Transient Conditions in Electrical Drives8. Size and Rating of Motors9. Enclosures for rotating electrical machines10. Selection of electric motor for any application11. Motors for particular applications12. Energy conservation in electrical drivesQUESTION BANKINDEX About Author : Er. R. K. Rajput, born on 15th September, 1944 (coincident with Engineer's Day) is a multi-disciplinary engineer. He obtained his Master's degree in Mechanical Engineering (with Hons. - Gold Medal) from Thapar Institute of Engineering and Technology, Patiala. He is also a Graduate Engineer in Electrical Engineering. Apart from this he holds memberships of various professional bodies like Member Institution of Engineers (MIE); Member Indian Society of Technical Education (MISTE) and Member Solar Energy Society of India (MSESI). He is also a Chartered Engineer (India). He has served for several years as Principal of 'Punjab College of Information Technology', Patiala and 'Thapar Polytechnic, Patiala'.He has more than 40 years of experience in teaching different subjects of Mechanical and Electrical Engineering disciplines. He has published/presented a large number of technical papers. He is the author of several books on theimportant subjects of Mechanical as well as Electrical Engineering disciplines.He has earned, by dint of hard work and devotion to duty, the following awards/honours :* Best Teacher (Academic) Award * Jawahar Lal Nehru Memorial Gold Medal for an outstanding research paper (Institution of Engineers) * Distinguished Author Award * Man of Achievement Award.