7EE6.2 COMPUTER AIDED DESIGN OF ELECTRICAL MACHINES

Unit-1 Basic Principles of Electrical Machine Design: Specifications, Factors affecting the design, Limitations, main dimension, loadings, output equation, factor affecting the size and rating, Electrical Engineering Materials: conducting, magnetic and insulating materials. Magnetic Circuit Calculation: Ohm’s law for magnetic circuit, mmf required for air gap and iron parts, tapered teeth, real and apparent flux density, magnetizing current.
Unit-2 Heating and Cooling of Electrical Machines: heat dissipation and heat flow equations, Newton’s law of cooling, equations for temperature rise, Rating of Machines: Continuous, short and intermittent ratings, mean temperature rise, hydrogen cooling of turbo alternators, quantity of cooling medium.
Unit-3 Computer Aided Design of Transformers: Power and Distribution Transformers, core and yoke cross sections, square and stepped core, output equations, main dimensions, types &, design of windings, optimization concepts.
Unit-4 Computer Aided Design of Synchronous Machines: Turbo and Hydro alternators, choice of specific magnetic & electric loading, short circuit ratio and its effects, air gap length, output equation, main dimensions, flow charts for design of synchronous machine, design of stator core & winding.
Unit-5 Computer Aided Design of Induction Machines: Output equation, main dimensions, design criteria, flow charts for design of induction motor, air gap length, design of stator core and winding, rotor design.

Reference/Suggested Books
1. A. K. Sawhney, “A Course in Electrical Machine Design” Dhanpat Rai & Sons.
2. Generalized theory of electrical Machines by B. Edikins.
3. Electrical Machinery by Fitzegerald; Kingsley.
4. M.G. Say, “The Performance and Design of AC Machines” Pitman & Sons.
5. R.K. Agrawal – Electrical Machine Design