Friday 28 April 2017

A Text Book of Electrical Technology BL Theraja Volume-2

 A Text Book of Electrical Technology BL Theraja Volume-2 free download

Chapter and content inside the chapters are given below:

 25. Elements of Electro-mechanical Energy Conversion Introduction—Salient aspects of conversions--Energy-bal. ante—Magnetic-field system. Energy and Co-energy—Linea. System—A Simple Electromechanical System— In icons of Field Energy In terms of field Co-energy--Energy in terms of flecuical parameters Rotary Motion—Description of Simple System—Energy stored In the coils —Different Categories One codex It on Slalom and on Rotor—Vital Role of Air -gap—StatIcalh Induced cml and Dynamkalh induced cmf.

26. D.C. Generators...
Generator Principal—Simple Loop Generator- - PractAalGen• erator—Yoke — Pole Cores and Pole Shoes—Pole Coils—Armature Core.--ArmatureWmdings Bushes and Bearings—Poic-pitch --Conductor .Coil and Winding Element —Coikpan or Coilpitth--Pitch all a Winding—tack Pitch—front Pilch—Resultant Pitch Commutator Pitch- Single. . layer Winding-- TWO.layel Winding— Degree of Reentrancy of an Armature Winding—Alult Ole. Winding—lap and Wave Winding—Sim-plea lap Winding- Numbering of Coils and Commutator Seg. ments--Simplea Wave Winding—Dummy 011dle Coils—Uses of Lap and Wave Windings—Types of Generators—Brush Contact Drop Generated E.M.F. or E.K.F. Eopation of a Generator—Iron Loss in Armature--Total loss In a D.C. Generator—Stray tosses- Constant or Standing Losses—Power Stages --Condition lot Maximum Efficiency.

27. Armature Reaction and Commutation
Armature Reaction -Demagnetising and Cross-magnetising Conductors- Demagnetising AT per Pole- -Crossmagnetising AT per pole- - Compensating Windings —No. or Compensat ing Windings- -Commutation—Value of Reactance %Poltagc-Mehods of Imposing Commutation -- Resistance (amnia lion —F. M F Commutation - Interpoles or Compotes- - Equalising Connections Parallel Operation of Shunt Genera-tors Patalleling D.C. Generator- Load Sharing- -Procedure for Paralleling D.0 Generators— Compound Generators in Parallel—Series Generators in Parallel.

28. Generator Characteristics
Characteristks of D.C. Generators—Separateb,cacited Gem valor —No-load Curve for Self.mcited Generator—How to find Critical Resistance R? How to draw O.C.C. at Different Speeds r—Critical Speed--Vollage Build up of a Shunt Gen-erator—Condition for Buildup of a Shunt Generator—Other factors Affecting Voltage Building of a D.C. Generator- — Lsternal Characteristic—Voltage Regulation—Internal or To-tal Characteristic—Series Generator Compound-wound Gen. color- -How to calculate Required Series Turns,- -Uses of D.C. Generators Questions and Answers on D.C. Generators.

29. D.C. Motor
Motor Principle—Comparison of Generator and Motor Ac-tion Significance of the Back ern1.—Voltage Equatron of a Motor Conditions for Maximum Power -Torque --Arma. lure Torque of a Motor- Shaft Torque—Speed of a D.C. Motor—Speed RegulationTorque and Speed of a D.C. Mo-tor—Motor Characteristics—Characlerimics of Series Mo. tors—Charat [mist Ins of Shunt Motors—Compound Motors—Performance Curves—Comparison of Shunt and Series SIG. too—losses and Efficiency—Power Stages.

30. Speed Control of D.C. Motors Factors Controlling Motor Speed—Speed Control of Shunt Motors—Speed Control of Ser ics Motors —Merits and Demer-its of Rheostatic Control Method--Series-Parallel Control—Electric Braking—Electric Braking of Shunt Motor—Electric Braking of Series Motors—Electronic Speed control Method for D.C. Motors—Uncontrolled Rectifiers—Controlled Real-fiers--Thyristor Choppers—Thyristor Inverters—Thyristor Speed Control of Separatebr.emited D.C.Motor—ThyrIstor Speed Control of D.C. Seres Motor—Full-wave Speed Control of a Shunt Motoe—Thristor Control of a Shunt Motor—Thyristor Speed Control of a Series D.C. Motor—Necessity of a Starter—Shunt Motor Starter—Three-point Starter—Four. point Starter—Starting and Speed Control of Series MOIOrs—Coadingof Starting Resistance—Shunt Motors—Series Motor Starters—Thristor Controller Starters.

31. Testing of D.C. Machines Brake Test—Swinburnes Tot--Advantages of Swinburnes Test —Main Disadvantages—Regenerative or Hopkinson's Test —Alternathe Connections for Hopkinson-% Test—Merits of Hopkinsons lest—Retardation or Running Down 'Test—Cc)
I icicYs Test for Series Motors—Oblective Tests—Questions and Answers on D.C. Motors.

32. Transformer... ...1115-1210
Working Principle of Transformer—Transformer Construc-tion—Core-type Transformers—Shell type Transformers—Elementary Theory of an Ideal Transformer —E.M.F. Equation of Transformer—Voltage Transformation Ratio—Transformer with losses but no Magnetic leakage--Transformer on No-lead—Transformer on load with Winding Re-sistance but no Magnetic Leakage—Equivalent Resistance—Magnetic leakage--Transformer with Resistance and Leakage Reactance—Simplified Diagram—Total Approximate Voltage Drop in Transformer --Wet Voltage Drop—Equivalent Cir-cult Transformer Tests—Open.c ircuit or No-load Test—Sepa-ration of Core Losses—Short-Circuit or !moo:fence Test—Why Transformer Rating In KV/tit—Regulation of a Trans. former--Percentage Resistance. Reactance and Impedance—Kapp Regulation Diagram—Sumpner or Back-to-back- Test—Efficiency of a Translonner—Conditron for Maximum FAD. clency— Variation of Efficiency with Power Factor—All-day Efficiency—Auto-transformer—Conversion of 2-Winding Transformer into Auto-transformer- -Parallel Operation of Single-phase Transformers —QuestionsandAnswers on Trans-formers.

33. Transformer :Three Phase
Three-phase Transformers—Three-ohm< Transformer Con-nections—Star/Star Of Y/Y Connection—Delta-Delta on Con. nection—Wye/Delta Of Y/Conncation--OcIta/Wye tar /Y Con. nection—Open-Delta or V-V Connection—Power Supplied by V-V Bank—Scott Connection or T.T Connection - Three. phase to Two-Phase Conversion and vice-versa—Parallel Op-eration of 3-phase Transformers—instrument Transformers—Current I ransformers--Polential Transformers.

34. Induction Motor
Classification of AC Motors—Induction Motor. General Prin-cipal—Construction—Squirrel-cage Rotor—Phase-wound Rotor—Production of Rotating Field—Three-phase Supphi—Mathematkal Proof—Why does the Rotor Rotate ?—Slip—i requency of Rotor Current—Relation between TOIQUO and Rotor Power Factor—Starling Torque—Starting Torope of a Squirrel-cage Motor—Starting Torque of a Slip-ring Motor—Condition for Maximum Staring Torque—Effect of Change in Supply Voltage on Starting formic—Rotor E.M.F and Re3C. tance under Running Condition - Torque uncle; Running Con-dition Condition for Maximum TORILIC Under Running Con-ditions- Rotor Torque and Breakdown Torque Relation be (wren Torque and Slip - Effect of Change in Supply Voltage on Torque and Speed Effect of Change in Supply frequency Torquer and Speed -Full-load Torque and Maximum Torque-Starting Torque and Maximum Tornalle TOMOC/SVCCIrl Cunr--- Shape of Torque/Speed Curve- -CurrenVSpeed Curve of an Induction Motor Torque/Speed Characteristic Under Load -Plugging of an Induction Motor-Induction Motor Operating as a Generator-Complete Torque/Speed Curve of a Three. phase Machine-Measurement of Slip-Power Stages In an Induction Moron— Torque 1)escloped by an Induction Mo-tor -Torque. Mechanical Pour: and Rotor Output-Induction Motor Torque Equation-Synchronous Watt-Variation in Rotor Current -Analog with a &technical Clutch- Analogy with a D.C. Motor-Sector Induc lion Motor-Lineal Induction Motor Properties of a linear Induction Motor - Magnetic levitation --Induction Motor as a Generalized Transformer -Rotor Output-AA:urn/31cm Circuit of the ROW - Equisulent Circuit of an Induction Motor-Power Balance Equation-Maximum Power Output-Corresponding Slip.

35. Computation And Circle Diagrams General -C ode Diagram for a Series Circuit-Circle Diagram of the Approsimatc EgWvaknt ClIcic• Cider Mir131011 of GO and BO- No-load Test-Blocked Rotor Test-Construction of the Code Diagram -Maximum Quantities Starling of Induction Moluts-Direct-Switching or Line Starting of Induc. lion Motors-Squirrel-cage Motors- -Starting of Slip-ring Motors-Starter Steps-Crawling--Coggingor &lag,netk lock-ing --0oubleSolurrel-cageldonw-Tostiralent circuit-Speed Control of Induction Motor I hree-Phase AC. Commutator M01111—Schrage Motor-Motor Enclosures-Standard type of Souirrel.cage Motors-Class A Motors.--Class B Motors- - Class C motors -- D motor, -Class F Motors-Class F motoo Questions and Answer on Induction Motor's.

36. Single-Phase Motors Types of Single-phase Motors-Single-phase Induction Mo. tor--Double-field Revolving Theory--Making Single-phase Induction Motor Self -srarting-foohralent Circuit of Single-phase Induction Motor Without Core Loss-Equivalent Crmuit -With Core loss-Types of Capacitors-Start Mo-tors Capacitor Start-and-Run Motor- -Shaded-pole Single-phase Motor-Repulsion Type Motors-Repulsion Motor---Repulsion Principle-Compensated Repulsion Motor-Re- pulsion-start Induction-run Motor— Repulsion Induction Motor A.C. Series Motors -Universal Motor Speed Con-trol of Universal Motors- -Unexcited Single-phase Synchro-nous Motors—Reluctance Motor—hysteresis Motor—Ques-tions and Answers on Single-phase Motors.

37. Alternators
Basic Principle—Stationary Armature---Details of Construc-tion—Rotor—Damper Windings—Speed and Frequency—Armature Windings—Concentric or Chain Windings—Two. layer Winding—Wye and Della Connections- Short-pitch Winding: pitch factor/chording lactor —Distribution or Breadth Factor or Winding Factor or Spread Factor f otratron of Induced E.M.F.—Effect of Elormonks on Pitch and Distribu• lion Factors--Factors Affecting Alternator Size—Alternator on Load—Synchronous Reactance Vector- Dragrams ol I imaled Alternator—Voltage Regulation —Determination of Voltage Regulation—Synchronous Impedence Method—Rothells M.M.F. or Ampere turn Method General Case Zero Power Factor Method or Polio Method—Procedural Steps of Potter Method—Operation of Salient Pole Synchronous Machine—Phasor Diagram for a Salient Pole Synchronous Machine—Calculations from Phasor Diagram—Passer Developed by a Synchonous Generator—parallel Operation of Alternators-- Synchronizrng of Alternator,— Synchronizing Current --Syn. chronizing Power Alternators Connected to Infinite Bus-bars—Synchronising Torque Isy—Effect of Load on Synchro-nizing Power--Altunativc Expression for Synchronizing Power—Parallel Operation of two Alternators -- Effect of Un-equal Voltages—Distribution of Load—lime-Period of Oscil-lation Maximum Power Output—Questions and Answers on Alternators.

38. Synchronous Motor Synchronous Motor.General---Principle of Operation—Method of Starting - Motor on Load with Constant Excitation--Power Flow within a Synchronous Motor- Euuhralent Circuit of a Synchronous Motor—Power Developed by a Synchronous Motor—Synchronous Motor with Different Excitations—Effect of Increased Load with Constant Excitation—Effect of Changing Excitation of Constant Load—Different Torques of a Synchronous Motor —Power Developed by a Synchronous Motor—Alternative Expression for Power Developed Vari-ous Conditions of Maxims—Salient Pole Synchronous Mo-tor—Power Developed by a Salient Pole Synchronous Motor — Effects of Excitation on Armature Current and Power Factor —Cortstant-Power tines—Construction of V-curees. 'hinting°, Surging or Phase Swinging—nlethods of SUlting—Proccdurc for Starting a Synchronous Motor—Comparison between Synchronous and Induction Motors—Synchronous Motor Applications—Questions and Answers on synchronous Motors.

39 W. Special Machines ...1535--1568 Introduction—Stepper Stotrws—Types of Stepper Motors—Variable Reluctance Stepper Motors —Multi.stac L VR Stepper Motor--Perrnanent • Magnet Stepping Motor—hybrid Stepper Motor—Summary of Stepper Motors—Permanent.Magnel DC Motor—Low-Inertia DC Motors—Shell.type Low-intertia DC Motor - Printed.eircuit (Disc) DC Motor—renanent•Mag. net Synchronous Motors—Synchros--Types o1 Synchros—Applications of Synchros, Control Differential ransmitter — Control DifIcrential Receiver—Snitched Reluctance Motor — Comparison between VR Stepper Motor and SR Motor— I he Resolver—Senomotors—DC Servomotors—AC Servomotors.

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