EE6401 Syllabus Electrical Machines 1
EE6401 Syllabus Electrical Machines 1 Regulation 2013 Anna University
UNIT I MAGNETIC CIRCUITS AND MAGNETIC MATERIALS EE6401 Syllabus
Magnetic circuits –Laws governing magnetic circuits – Flux linkage,
Inductance and energy – Statically and Dynamically induced EMF – Torque – Properties of magnetic materials, Hysterisis and Eddy Current losses – AC excitation, introduction to permanent magnets-Transformer as a magnetically coupled circuit..
UNIT II TRANSFORMERS Electrical Machines 1 Syllabus
Construction – principle of operation – equivalent circuit parameters – phasor diagrams, losses – testing – efficiency and voltage regulation-all day efficiency- Sumpner’s test, per unit representation – inrush current – three phase transformersconnections – Scott Connection – Phasing of transformer– parallel operation of three phase transformers-auto transformer – tap changing transformers- tertiary Winding
UNIT III ELECTROMECHANICAL ENERGY CONVERSION AND CONCEPTS IN ROTATING MACHINES EE6401 Syllabus
Energy in magnetic systems – field energy, co energy and mechanical force – singly and multiply excited systems. Energy in magnetic system – Field energy and coenergy -force and torque equations – singly and multiply excited magnetic field systems-mmf of distributed windings – Winding Inductances-, magnetic fields in
rotating machines – rotating mmf waves – magnetic saturation and leakage fluxes.
UNIT IV DC GENERATORS Electrical Machines 1 Syllabus
Construction and components of DC Machine – Principle of operation – Lap and wave windings-EMF equations– circuit model – armature reaction –methods of excitation-commutation and inter poles – compensating winding –characteristics of DC generators.
UNIT V DC MOTORS EE6401 Syllabus
Principle and operations – types of DC Motors – Speed Torque Characteristics of DC Motors-starting and speed control of DC motors –Plugging, dynamic and regenerative braking- testing and efficiency – Retardation test- Swinburne’s test and Hopkinson’s test – Permanent magnet dc motors(PMDC)-DC Motor applications
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