Note for Electrical Machines and Power Devices - EMPD By Bibhudatta Paikaray

Constructional Features; Methods of Excitation; Expression for EMF Induced and Torque Developed in the Armature. 2. DC GENERATORS: No Load Characteristics for Separately Excited DC Generator and DC Shunt Generator, Conditions for Self Excitation; Critical Resistance and Critical Speed; Losses and Efficiency

Speed Armature Current, Torque Armature Current and Speed Torque Characteristic for (i) Separately Excited DC Motor, (ii) DC Shunt Motor, (iii) DC Series Motor, and (iv) DC Compound Motor, Speed control and Starting of DC shunt and DC series motors, Brushless motors; Motor drive circuits

Constructional Features; EMF Equation; Turns Ratio, Determination of Parameters From Tests (Open Circuit Test and Short Circuit Test), Equivalent Circuit, Losses and Efficiency; Introduction to Three Phase Transformers: Three Single Phase Transformers Connected as a Bank of Three Phase Transformer.

Constructional Features; Principle of operation as Alternator and Synchronous Motor; Synchronous Impedance; Voltage Regulation by Synchronous Impedance Method; Power-Angle curve; Synchronization of Alternators; Torque Expression and Phasor Diagram for Synchronous Motor; Electrical Power and Mechanical Power; Starting of Synchronous Motor

Characteristics Principles of operation, starting

Constructional Features of Squirrel Cage Rotor type and Slip Ring/Wound Rotor type of Induction Motors, Principle of Operation; Concept of Slip, Slip Torque Characteristics; Starting of Squirrel Cage Rotor type and Slip Ring/Wound Rotor type of Induction Motors; Speed Control of Induction Motors.

Revolving Field Theory; Split Phase (capacitor start and run) and Shaded Pole Starting of Single Phase Induction Motors; Speed Current, Torque Current and Speed Torque Characteristic for Single Phase AC Series Motor