1st YEAR: 1st SEMESTER (JULY-DEC) - CIT, Kokrajhar...

CENTRAL INSTITUTE OF TECHNOLOGY(Centrally Funded Institute Under the Ministry of HRD, Govt. of India)Bodoland Territorial Council, Kokrajhar, Assam-783370(B.Tech Syllabus in Instrumentation Engineering)IE401: ELECTRICAL MACHINESCode: IE401Credit: 04L-T-P: 3-1-0Basic concept of rotating machines:General working principle and constructional features. - Type of windings- generation ofvoltage, production of torqueD.C. MachinesConstructional details – emf equation – Methods of excitation – Self and separately excitedgenerators – Characteristics of series, shunt and compound generators –Principle of operation ofD.C. motor – Back emf and torque equation – Characteristics of series, shunt and compoundmotors - Starting of D.C. motors – Types of starters -Testing, brake test and Swinburne’s test –Speed control of D.C. shunt motors.Transformers:Constructional details – Principle of operation – emf equation – Transformation ratio –Transformer on no load – Parameters referred to HV/LV windings – Equivalent circuit –Transformer on load – Regulation - Testing – Load test, open circuit and short circuit tests.Single phase motors:Principle of working-double revolving theory, starting characteristics and application of singlephase motor and universal motor.Induction MotorsConstruction – Types – Principle of operation of three phase induction motors – Equivalentcircuit – Performance calculation – Starting and speed control –Single phase induction motors.Synchronous and Special MachinesSalient pole and cylindrical rotor machines. Synchronous generator, distribution and coil spanfactors, E.M.F. equation. Salient pole generator phase diagram. Synchronous motor – principleof working, phasor diagram, v-curves, starting. Synchronous condenser and power factorimprovement. – Reluctance motor – Hysteresis motor – stepper motor.TEXT/REFERENCE BOOKS1. S.K.Bhattacharya, ‘Electrical Machines’, Tata McGraw Hill Publishing company ltd, secondedition, 1998.2. V.K.Mehta and Rohit Mehta, ‘Principles of Power System’, S.Chand and Company Ltd, thirdedition, 2003.3. D.P.Kothari and I.J.Nagrath, ‘Basic Electrical Engineering’, Tata McGraw Hill publishingcompany ltd, second edition, 2002.4. C.L. Wadhwa, ‘Electrical Power Systems’ Wiley eastern ltd India, 1985.Page 47 of 75