Here you can download the free lecture Notes of Electrical Machines 1 Pdf Notes – EM 1 Pdf Notes materials with multiple file links to download. The Electrical Machines 1 Notes Pdf – EM 1 Notes Pdf book starts with the topics covering Electromechanical Energy conversion, Construction & Operation, Generator:Armature reaction, separately excited and self excited generators, Load characteristics of shunt, Principle of operation, Speed control of d.c. Motors, Testing of d.c. machines: Losses, Etc.

**Complete Notes**

**Complete Notes**

**Unit 1**

**Unit 2**

**Unit 3**

**Unit 4**

**UNIT – I**

Electromechanical Energy Conversion:Electromechanical Energy conversion – forces and torque in magnetic field systems – energy balance – energy and force in a singly excited magnetic field system, determination of magnetic force – co-energy – multi excited magnetic field systems.

**UNIT – II**

D.C. Generators – Construction & Operation:D.C. Generators – Principle of operation – Action of commutator – constructional features – armature windings – lap and wave windings – simplex and multiplex windings – use of laminated armature – E. M.F Equation – Problems

**UNIT – III**

Armature reaction in D.C. Generator:Armature reaction – Cross magnetizing and de-magnetizing AT/pole – compensating winding – commutation – reactance voltage – methods of improving commutation.

**UNIT – IV**

Types of D.C Generators:Methods of Excitation – separately excited and self excited generators – build-up of E.M.F – critical field resistance and critical speed – causes for failure to self excite and remedial measures.

**UNIT – V**

Load Characteristics of Generators:Load characteristics of shunt, series and compound generators – parallel operation of d.c series generators – use of equalizer bar and cross connection of field windings – load sharing.

**UNIT – VI**

D.C. Motors :D.C Motors – Principle of operation – Back E.M.F. – Torque equation – characteristics and application of shunt, series and compound motors – Armature reaction and commutation.

**UNIT – VII**

Speed control of D.C. Motors:Speed control of d.c. Motors: Armature voltage and field flux control methods. Ward-Leonard system. Principle of 3 point and 4 point starters – protective devices.

**UNIT – VIII**

Testing of D.C. Machines:Testing of d.c. machines: Losses – Constant & Variable losses – calculation of efficiency – condition for maximum efficiency

Methods of Testing – direct, indirect and regenerative testing – brake test – Swinburne’s test – Hopkinson’s test – Field’s test – Retardation test – separation of stray losses in a d.c. motor test.

**Reference**

1. Performance and Design of D.C Machines – by Clayton & Hancock, BPB Publishers

2. Electrical Machines -S.K. Battacharya,

3. Electric Machines by I.J. Nagrath & D.P. Kothari, Tata Mc Graw – Hill Publishers, 3rd edition, 2004.

4. Electromechanics – I (D.C. Machines) S. Kamakshaiah Hi-Tech Publishers.

**Text books**

1. Electric Machinary – A. E. Fritzgerald, C. Kingsley and S. Umans, Mc Graw-Hill Companies, 5th editon

2. Electrical Machines – P.S. Bimbra., Khanna Publishers

**Note :- These notes are according to the r09 Syllabus book of**** ****JNTUH.In R13 & R15,8-units of R09 syllabus are combined into 5-units in r13 syllabus.Click here to check all the JNTU Syllabus books**

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Here you can download the free lecture Notes of Engineering Mathematics 1 Pdf Notes – EM 1 Pdf Notes materials with multiple file links to download. The Engineering Mathematics 1 Notes Pdf – EM 1 Notes Pdf book starts with the topics covering Basic definitions of Sequences and series, Cauchy’s mean value Theorem, Evolutes and Envelopes Curve tracing, Integral Representation for lengths, Overview of differential equations, Higher Order Linear differential equations and their applications, Gradient- Divergence, etc.

Engineering Mathematics – I Notes download links are listed below please check it –

**Complete Notes**

**UNIT – I Engineering Mathematics 1 Notes**

**Sequences – Series**

Basic definitions of Sequences and series – Convergences and divergence – Ratio test – Comparison test – Integral test – Cauchy’s root test – Raabe’s test – Absolute and conditional convergence

**UNIT – II Engineering Mathematics 1 Notes**

**Functions of Single Variable**

Rolle’s Theorem – Lagrange’s Mean Value Theorem – Cauchy’s mean value Theorem – Generalized Mean Value theorem (all theorems without proof) Functions of several variables – Functional dependence- Jacobian- Maxima and Minima of functions of two variables with constraints and without constraints

**UNIT – III Engineering Mathematics 1 Notes**

**Application of Single variables**

Radius, Centre and Circle of Curvature – Evolutes and Envelopes Curve tracing – Cartesian , polar and Parametric curves.

**UNIT – IV**

**Integration & its applications**

Riemann Sums , Integral Representation for lengths, Areas, Volumes and Surface areas in Cartesian and polar coordinates multiple integrals – double and triple integrals – change of order of integration- change of variable

**Differential equations of first order and their applications**

Overview of differential equations- exact, linear and Bernoulli. Applications to Newton’s Law of cooling, Law of natural growth and decay, orthogonal trajectories and geometrical applications.

**Higher Order Linear differential equations and their applications**

Linear differential equations of second and higher order with constant coefficients, RHS term of the type f(X)= e ax , Sin ax, Cos ax, and xn, e ax V(x), x n V(x), method of variation of parameters. Applications bending of beams, Electrical circuits, simple harmonic motion.

**Laplace transform and its applications to Ordinary differential equations**

Laplace transform of standard functions – Inverse transform – first shifting Theorem, Transforms of derivatives and integrals – Unit step function – second shifting theorem – Dirac’s delta function – Convolution theorem – Periodic function – Differentiation and integration of transforms-Application of Laplace transforms to ordinary differential equations.

**Vector Calculus**

Vector Calculus: Gradient- Divergence- Curl and their related properties Potential function – Laplacian and second order operators. Line integral – work done ––- Surface integrals – Flux of a vector valued function. Vector integrals theorems: Green’s -Stoke’s and Gauss’s Divergence Theorems (Statement & their Verification).

**Reference –** Engineering Mathematics 1 Pdf Notes – EM 1 Pdf Notes – EM I Pdf – EM I Notes

1. Engineering Mathematics – I by T.K. V. Iyengar, B. Krishna Gandhi & Others, S. Chand.

2. Engineering Mathematics – I by D. S. Chandrasekhar, Prison Books Pvt. Ltd.

3. Engineering Mathematics – I by G. Shanker Rao & Others I.K. International Publications.

4. Higher Engineering Mathematics – B.S. Grewal, Khanna Publications.

5. Advance Engineering Mathematics by Jain and S.R.K. Iyengar, Narosa Publications.

6. A text Book of KREYSZIG’S Engineering Mathematics, Vol-1 Dr .A. Ramakrishna Prasad. WILEY publications

**Text books –** Engineering Mathematics – I – EM I notes pdf – EM I pdf notes – EM I Pdf

1. Engineering Mathematics – I by P.B. Bhaskara Rao, S.K.V.S. Rama Chary, M. Bhujanga Rao.

2. Engineering Mathematics – I by C. Shankaraiah, VGS Booklinks.

**Note :- These notes are according to the r09 Syllabus book of ****JNTUH****.In R13 & R15,8-units of R09 syllabus are combined into 5-units in r13 syllabus.****Click here to check all the JNTU Syllabus books**

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