EE 2251 ELECTRICAL MACHINES – I lecture notes | for EEE - IV semester | by R.Anirudhan

EE 2251 ELECTRICAL MACHINES – I lecture notes | for EEE - IV semester | by R.Anirudhan

download link 1: "electrical machines -I" (transformers)

download link 2: "electrical machines -I" (d.c. machines)

download link 3: "electrical machines -I" (introduction,basic types etc..)

syllabus :
UNIT I INTRODUCTION 
Electrical machine types – Magnetic circuits – Inductance – Statically and Dynamically induced EMF
- Torque – Hysteresis- Core losses - AC operation of magnetic circuits.

UNIT II TRANSFORMERS 
Construction – principle of operation – equivalent circuit – losses – testing – efficiency and voltage
regulation – auto transformer – three phase connections – parallel operation of transformers – tap
changing.

UNIT III ELECTROMECHANICAL ENERGY CONVERSION 
Energy in magnetic systems – field energy, coenergy and mechanical force – singly and multiply
excited systems.

UNIT IV 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.

UNIT V 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.
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