HD5EC : ELECTRICAL MACHINES

1 INTRODUCTION

 Basic concept of Electrical Engineering; Resistance, Inductance, Capacitance, Resistance connected in series and Parallel, Capacitance connected in series and parallel, Concept of AC/DC currents and AC/DC Voltages, EMF, Potential difference, Work, Power and Energy.

 2 DC NETWORKS

Kirchhoff’s  Laws, Node voltage and Mesh current Methods Delta – Star and Star - Delta Conversion Superposition principle Thevenin’s and Norton’s  Theorems

3  TRANSFORMER

Construction and principle of X’Mers, EMF equation, Ideal X’Mer, Shell type & Core type X’Mer, Phasor Diagrams , Equivalent Circuits, Regulation and Efficiency of X’Mer, Capacity of X’Mer, and Losses, Introduction to Auto X’Mer

4  DC MACHINES

Contruction and Principle of DC generation and DC  Motor, Back emf of DC Motor, Types of DC Motor, Reversal of Direction of Rotation of DC Motor, Starting of DC Motor, Characteristics of DC Motor, Uses of DC Motor, Losses in DC Machine.

5  ALTERNATOR

 Contruction and Working principle of Alternator, Application of Alternators.

6  SYNCHRONOUS MOTORS

Principle of Operation, Application of Synchronous MotorsComparisionbetween Synchronous Motor and Induction Motors