JNTUH B.Tech 2nd year Electrical Machines – I gives you detail information about Electrical Machines – I Engineering R13 year subject. It will be help full you to understand you complete curriculum of the year.
Objective
Electrical machines course is one of the important courses of the Electrical discipline. In this course the different
types of DC generators and motors which are widely used in industry are covered and their performance aspects
will be studied.
UNIT – I
Electromechanical Energy Conversion: Electromechanical Energy conversion – forces and torque in magnetic field systems – energy balance – energy and force in a singly excited magnetic field system, determination of magnetic force – co-energy – multi excited magnetic field systems.
UNIT – II
D.C. Generators & Armature Reaction : D.C. Generators – Principle of operation – Action of commutator – constructional features – armature windings – lap and wave windings – simplex and multiplex windings – use of laminated armature – E. M.F Equation – Problems Armature reaction – Cross magnetizing and de-magnetizing AT/pole – compensating winding – commutation – reactance voltage – methods of improving commutation.
UNIT – III
Types of D.C Generators & Load Characteristics : Methods of Excitation – separately excited and self excited generators – build-up of E.M.F – critical field resistance and critical speed – causes for failure to self excite and remedial measures. Load characteristics of shunt, series and compound generators – parallel operation of d.c series generators – use of equalizer bar and cross connection of field windings – load sharing.
TEXT BOOKS
- Electrical Machines, P.S. Bimbra, Khanna Publishers.
- Principles of Electrical Machines, V. K. Mehta, Rohit Mehta, S. Chand Publishing.
REFERENCE BOOKS
- Electric Machines, Mulukutla S. Sarma, Mukesh K. Pathak, Cengage Learning.
- Electric Machines by I.J. Nagrath & D.P. Kothari, Tata Mc Graw – Hill Publishers.
- Fundamentals of Electric Machines, B. R. Gupta, Vandana Singhal, New Age International Publishers.
- Electrical Machines, M. V. Deshpande, PHI Learning Private Limited.
- Electrical Machines, R. K. Srivastava, Cengage Learning.
Outcome
After going through this course the student gets a thorough knowledge on electromechanical energy conversion, construction operation characteristics speed control methods and testing of different types of DC Generators and DC motors, with which he/she can able to apply the above conceptual things to real-world electrical and electronics problems and applications.
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