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Neeraj Yadav


Neeraj Yadav | 14-Nov-2015 |
Transformer , DC machine ,

Hi friends, here Neeraj Yadav uploaded notes for ELECTROMECHANICAL ENERGY CONVERSION with title ELECTROMECHANICAL ENERGY CONVERSION-1. You can download this lecture notes, ebook by clicking on the below file name or icon.

 Unit – I Principles of Electro-mechanical Energy Conversion  Introduction.   [4-13] Flow of Energy in Electromechanical Devices, Energy in magnetic systems(defining energy & Co-energy) , Singly Excited Systems; determination of mechanical force, mechanical energy, torque equation , Doubly excited Systems Energy stored in magnetic field,  electromagnetic torque ,  Generated emf in machines;  torque in machines with cylindrical air gap .  Unit – 2    D.C. Machines:          [14-22] Construction of DC Machines  Armature winding, Emf and torque equation ,  Armature Reaction ,Commutation ,  Interpoles and Compensating Windings  Performance Characteristics of D.C. generators   Unit –3  D.C. Machines (Contd.):         [23-34]  Performance Characteristics of D.C. motors  Starting of D.C. motors ; 3  point and 4 point starters , Speed control of D.C. motors:  Field Control , armature control and Voltage Control (Ward Lenonard method); Unit 4 Single Phase Transformer:       [35-55]  Phasor diagram,  efficiency and voltage regulation all day efficiency.  Testing of Transformers:  O.C. and S.C. tests  Sumpner’s test,  polarity test.  Auto Transformer:  Single phase and three phase auto transformers volt-amp, relation, efficiency,  merits & demerits and applications  Unit –5  Three Phase Transformers:        [56-67]  Construction,  three phase transformer phasor groups  their  connections,  open delta connection,  three phase to 2 phase,  6 phase or 12 phase connections,   and their applications  parallel operation and load sharing of single phase  and three phase transformers,  excitation phenomenon and harmonics in transformers,  three winding transformers.

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