hamari acadmi: Basic Electrical Engineering

Basic Electrical Engineering

by U.A.Bakshi , V.U.Bakshi

The primary objective of this book basic electrical engineering is to provide a comprehensive treatment of topics in Basic Electrical Engineering both for electrical as well as non electrical students pursuing their studies in civil, mechanical ,mining ,textile ,chemical ,industrial ,environmental ,aerospace ,electronic and computer engineering both at the Degree and diploma level. Based on the suggestions received from esteemed readers,the scope of the book has been enlarged according to their requirements.

This book provides the basic knowledge about the following topics :

D.C. CircuitsOhm s law and Kirchhoff s current law, Kirchhoff s voltage law - applications for the analysis of only series and parallel resistive circuits exited by independent voltage sources; Power and Energy in such circuits. Illustrative examples.ElectromagnetismFaradays laws, Len s law, Fleming s rules, Statically and dynamically induced E.M.F. s. Concept of self and mutual inductance. Concept of coefficient of coupling. Energy stored in magnetic field, Illustrative examples.Single-phase A.C. Circuits Generation of sinusoidal AC voltage, Definition of average value, R.M.S. value, Form factor and peak factor of sinusoidally varying voltage and current, meaning of lagging or leading of sinusoidal wave. Given a sinusoidally varying voltage or current as a function of time, Obtaining its phasor representation and vice versa. Definition of real power, Reactive power, Apparent power and power factor. Analysis with phasor diagram of circuits with R,L,C, R-L, R-C, R-L-C elements. Illustrative examples involving series and series parallel circuits.Three Phase CircuitsNecessity and advantages of three phase systems, Meaning of phase sequence, Balanced supply and load. Obtaining the relationship between line and phase values for balanced star and delta connections. Power in balanced three-phase circuits. Illustrative examples.Measuring InstrumentsConstruction and Principle of operation of dynamometer type wattmeter and single-phase induction type energy meter (problems excluded).Domestic Wiring Two-way position and three-way position control of a lamp. Necessity and types of earthing. Elementary discussion on fuses. Electric shock and precautions against it.D.C. MachinesWorking principle of DC machine as a generator and motor . Constructional features. E.M.F. equation of generator and illustrative examples. Back E.M.F. and torque equations of D.C. motors. Types of D.C. motors - Characteristics and applications. Necessity of a starter for motor Illustrative examples on motor.TransformersPrinciple of operation and construction of single phase transformers (core and shell types. E.M.F. equation, Power losses, Efficiency and voltage regulation (O.C. and S.C. tests, Equivalent circuits and phasor diagrams are excluded), Illustrative problems on E.M.F. equation and efficiency only.Synchronous GeneratorsPrinciple of operation. Types and constructional features. E.M.F. equation. Concept of winding factor (excluding derivation). Illustrative examples on E.M.F. equation and efficiency only.Three Phase Induction MotorsConcept of rotating magnetic field. Principle of operation. Constructional features. Slip and its significance. Applications of squirrel - Cage and slip - Ring motors. Necessity of a starter. Illustrative examples only on slip calculations. |EBOOK DOWNLOAD| |Pages 650| |30MB|

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