EE2251-ELECTRICAL MACHINES – I |
INTRODUCTION |
Electrical machine types – Magnetic circuits – Inductance – Statically and Dynamically induced EMF - Torque – Hysteresis- Core losses - AC operation of magnetic circuits. |
TRANSFORMERS |
Construction – principle of operation – equivalent circuit – losses – testing – efficiency and voltage regulation – auto transformer – three phase connections – parallel operation of transformers – tap changing. |
ELECTROMECHANICAL ENERGY CONVERSION |
Energy in magnetic systems – field energy, coenergy and mechanical force – singly and multiply excited systems. |
BASIC CONCEPTS IN ROTATING MACHINES |
Generated voltages in ac and dc machines, mmf of distributed windings – magnetic fields in rotating machines – rotating mmf waves – torque in ac and dc machines. |
DC MACHINES |
Construction – EMF and torque – circuit model – armature reaction – commutation – methods of excitation – characteristics of generators – characteristics of motors – starting and speed control – testing and efficiency – parallel operation. |
REFERENCE |
Text Books |
1.Nagrath I. J and Kothari D. P. ‘Electric Machines’, Tata McGraw Hill Publishing Company Ltd, 1990.
2.P.S. Bimbhra, ‘Electrical Machinery’, Khanna Publishers, 2003. |
Reference Books |
1.Fitzgerald.A.E., Charles Kingsely Jr, Stephen D.Umans, ‘Electric Machinery’, McGraw Hill Books Company, 1992.
2.P. C. Sen., ‘Principles of Electrical Machines and Power Electronics’, John Wiley&Sons, 1997.
3.K. Murugesh Kumar, ‘Electric Machines’, Vikas publishing house Pvt Ltd, 2002. |