The document outlines the aims, objectives, and units of an electrical machine design course. The aims are to obtain complete dimensions of machine parts to provide to manufacturers, with goals of lower cost, weight, and size while achieving better performance. The objectives are to familiarize students with electrical materials properties, magnetic and electric fields laws, circuit laws, electromagnetic induction laws, magnetic circuits calculations, and machine construction and behavior. The 5 units cover introduction and materials, DC machine design, transformer design, induction motor design, and synchronous machine design.

1. R.SARAVANAN/Sr.LECT. DEPARTMENT OF EEE PARISUTHAM INSTITUTE OF TECHNOLOGY & SCIENCE

2. AIM The aim of the design is to completely obtain the dimensions of all the parts of the machine to furnish the data to the manufacturer. The main aim of carrying out the design is to achieve the following. · Lower cost · Lower weight · Reduced size · Better operating performance. OBJECTIVES To design the electrical machines properly, one should be familiar with the following aspects of electrical engineering. · Various electrical materials and their properties. · Properties of magnetic and electric fields. · Laws governing electric circuits. · Laws of electromagnetic induction. · Calculation of magnetic circuits. · Construction of various types of electrical machines. · Behaviour of electrical machines under working conditions EE 1353-ELECTRICAL MACHINE DESIGN Unit 1 Unit 2 Unit 3 Unit 4 Unit 5

3. UNIT I INTRODUCTION Major considerations Limitations Electrical Engineering Materials Space Factor Temperature gradient Heat flow in two dimensions ThermalResistivity of winding Temperature gradient in conductors placed in slots . Ratingof machines Eddy current losses in conductors Standard specifications EE 1353-ELECTRICAL MACHINE DESIGN Unit 1 Unit 2 Unit 3 Unit 4 Unit 5

4. UNIT II DESIGN OF DC_MACHINES Constructional details Winding design Output equation Main dimensions Choice of specific loading Choice of number of poles Armature design Design of field poles and field coil Design of commutator and brushes Losses and efficiency calculations EE 1353-ELECTRICAL MACHINE DESIGN Unit 1 Unit 2 Unit 3 Unit 4 Unit 5

5. UNIT III TRANSFORMERS Constructional details of core and shell type transformers Amorphous Cores Output rating of single phase and three phase transformers Optimum design of transformers Design of core,Yoke and windings for core and shell type transformers No-load current calculation Design of tank and cooling tubes EE 1353-ELECTRICAL MACHINE DESIGN Unit 1 Unit 2 Unit 3 Unit 4 Unit 5

6. UNIT IV THREE PHASE INDUCTION MOTORS Constructional details of squirrel cage and slip ring motors Output equation Main dimensions Choice of specific loadings Design of stator Design of squirrel cage and slip ring rotor Noloadcurrent calculation Losses and efficiency calculations EE 1353-ELECTRICAL MACHINE DESIGN Unit 1 Unit 2 Unit 3 Unit 4 Unit 5

7. UNIT V SYNCHRONOUS MACHINES • Constructional details of cylindrical pole and salient pole alternators Winding design Output equation Choice of specific loadings Main dimensions Short circuit ratio Design of stator and rotor of cylindrical pole and salient pole machines Design of field coil Introduction to computer aided design EE 1353-ELECTRICAL MACHINE DESIGN Unit 1 Unit 2 Unit 3 Unit 4 Unit 5