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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.
Electrical Machines 1 Pdf Notes – EM 1 Pdf Notes
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Unit 1
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Unit 2
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Unit 3
Link – Unit 3 Notes
Unit 4
Link – Unit 4 Notes
Unit 5
Link – Unit 5 Notes
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Complete Notes
Link:Complete Notes
Unit 1
Link:Unit 1 Notes
Unit 2
Link:Unit 2 Notes
Unit 3
Link:Unit 3 Notes
Unit 4
Link:Unit 4 Notes
Unit 5
Link:Unit 5 Notes
Note :- These notes are according to the r09 Syllabus book ofJNTUH.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
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
Pc Sen Electrical Machines Pdf Combiner
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.
Pc Sen Electrical Machines Pdf Download
Electrical Machines 1 Notes Pdf – EM 1 Notes Pdf
Electrical Machines Pdf Notes
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
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