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Students those who are studying JNTUK R20 ECE Branch, Can Download Unit wise R20 1-2 Basic Electrical Engineering (BEE) Material/Notes PDFs below.

Preamble: This course covers various topics related to principle of operation and performance of various electrical machines.

Course Educational Objectives:

• To understand the principle of operation, constructional details andoperational characteristics ofDCgenerators.
• To understand the principle of operation, characteristics of DC motor. Methodsof starting and speed control methods ofDCmotors.
• To learn the constructional details, principle of operation and performanceof transformers.
• To study the principle of operation, construction and details ofsynchronousmachines.
• To learn the principle of operation, constructional details, performance, torque – slip characteristics and starting methods of 3-phaseinductionmotors.

UNIT-1

DC Machines Principle of operation of DC generator – emf equation – types of DC machines – torque equation of DC motor – applications – three point starter – losses and efficiency – swinburne’s test – speed control methods – OCC of DC generator- Brake test on DC Shunt motornumerical problems

UNIT-2

Transformers Principle of operation of single phase transformer constructional features – EMF equation – Losses and efficiency of transformer- regulation of transformer – OC & SC tests predetermination of efficiency and regulations – Sumpner’s test-NumericalProblems.

UNIT-3

Synchronous Generators Principle of operation and construction of alternators – types of alternators Regulation of alternator by synchronous impedance method-EMF equation of three phase alternator

Synchronous Motors Construction of three phase synchronous motor – operating principle –equivalent circuit of synchronous motor.

UNIT-4

Induction Machine: Principle of operation and construction of three-phase induction motors – slip ring and squirrel cage motors – slip-torque characteristics – efficiency calculation – starting methods-Brake test on 3-Phase Induction Motor.

UNIT-5

Special Machines: Principle of operation and construction – single phase induction motor – shaded pole motors – capacitor motors and AC servomotor.

Text Books:

• Principles of Electrical Machines by V.K. Mehta &Rohit Mehta,S.Chandpublications
• Theory & performance of Electrical Machines by J.B.Guptha, S.K.Kataria&Sons

Reference Books:

1. Basic Electrical Engineering by M.S.Naidu and S.Kamakshiah,TMH Publications
2. Fundamentals of Electrical Engineering by Rajendra Prasad, PHI Publications, 2nd edition
3. Basic Electrical Engineering by Nagsarkar, Sukhija, Oxford Publications, 2nd edition

Course Outcomes:

• Able to explain the operation of DC generator and analyze the characteristics of DC generator.
• Able to explain the principle of operation of DC motor and analyze theircharacteristics. Acquire the skills to analyze the starting and speed control methods ofDCmotors.
• Ability to analyze the performance and speed – torque characteristics of a3- phase induction motor and understand starting methods of 3- phaseinductionmotor.
• Able to explain the operation ofSynchronousMachines
• Capability to understand the operation of variousspecialmachines.