JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objective

This course introduces the concepts of electrical DC and AC circuits,

basic law’s of electricity, instruments to measure the electrical quantities, different methods to solve the electrical networks, construction operational features of energy conversion devices i.e. DC machines, transformers, induction motors and synchronous machines.

Course Outcome

After going through this course the student gets a thorough knowledge on

basic electrical circuits, parameters, and operation of the transformers in the energy conversion process, electromechanical energy conversion, construction operation characteristics different types applications of DC and AC machines and the constructional features and operation of measuring instruments like voltmeter, ammeter, wattmeter etc..., With which he/she can able to apply the above conceptual things to real-world electrical and electronics problems and applications.

UNIT - I

Introduction: SI Unit’s ohm’s law, series, and parallel circuits, Kirchhoff’s laws, Star-delta transformation (Simple Problems)– Force on a current carrying conductor in magnetic field– electromagnetic induction, Faraday’s law, Lenz’s law – Self and mutual inductances. Electrical Instruments: Basic principles of indicating instruments – moving coil and moving iron instruments (Ammeters and voltmeters).

UNIT - II

Single Phase AC Circuits: Generation of an alternating EMF – average and RMS values of alternating quantity – representation of alternating quantities by phasors – single phase series and parallel circuits (simple problems)– series and parallel resonance – three phase balanced systems – single and three phase power calculations.

UNIT - III

DC Generators: Principle of operation of DC machines – EMF equation – types of generators – Magnetization and Load characteristics of DC generators DC Motors: Principle of operation of DC Motor, Types of Motors, Back EMF Equation, Characteristics of DC motor, Torque Equation, DC Motor Starter (Three Point starter), Efficiency Calculation, Swinburne’s Test and speed control.

UNIT - IV

Transformers: Construction and principle of operation of single phase transformer –EMF equation O.C. & S.C. tests – efficiency and regulation. Induction Motors: Principle and operation of three phase induction motors – types of motors, Squirrel cage and slip ring motor – slip torque characteristics.

UNIT - V

Alternators: Principle and operation of alternators – O.C. & S.C. tests – regulation by synchronous impedance method.

TEXT BOOKS:

• 1. Basic concepts of Electrical Engineering, PS Subramanyam, BS Publications.
• 2. Basic Electrical Engineering, S.N. Singh, PHI.

REFERENCE BOOKS:

• 1. Basic Electrical Engineering, Abhijit Chakrabarthi, Sudipta nath, Chandrakumar Chanda, Tata-McGraw-Hill.
• 2. Principles of Electrical Engineering, V.K Mehta, Rohit Mehta, S.Chand Publications.
• 3. Basic Electrical Engineering, T.K.Nagasarkar and M.S. Sukhija, Oxford University Press.
• 4. Fundamentals of Electrical Engineering, RajendraPrasad, PHI.
• 5. Basic Electrical Engineering by D.P.Kothari , I.J. Nagrath, McGraw-Hill.