06EE54 - D.C. Machines and Synchronous Machines Regulation 2006 - 2007 |
PART – A |
UNIT – I DC GENERATOR |
Classification of DC generator, types of armature
winding, EMF equation, armature reaction, commutation, No load & load
characteristics, use of interlopes & compensating winding (only qualitative
treatment). |
UNIT – II DC Motors |
Classification, Back EMF equation, Torque equation,
Characteristics of shunt, series & compound motors, speed control of shunt &
series compound motors, losses in DC machines both generator and motor. |
UNIT – III LOSSES AND EFFICIENCY |
Direct & indirect methods of testing of DC
machines, permanent magnet DC motors and brushless DC motors,
applications of DC motors, Power flow diagram (all tests to be discussed). |
PART – B |
UNIT – IV SYNCHRONOUS MACHINES |
Basic principle of operation, construction
of salient & non-salient pole synchronous machines, generated EMF, effect
of distribution of winding and use of chorded coils. |
UNIT – V VOLTAGE REGULATION: |
Voltage regulation by EMF, MMF, ZPF & ASA method. |
UNIT – VI Time varying fields and Maxwell’s equations |
Synchronizing to infinite bus bars, parallel operation of alternators. Operating
characteristics, power angle characteristics excluding armature resistance,
operating for fixed input and variable excitation and vice-versa for both
generating and motoring modes, V curves of synchronous machines, power flow equations including armature resistance, capability curves of synchronous generators hunting in synchronous machines, damper winding
starting methods for hunting in synchronous machines
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UNIT – VII |
Salient pole synchronous machines, two-reaction theory, power angle
diagram, reluctance power, slip test.
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REFERENCE |
TEXT BOOKS: |
1. Performance & Design of Alternating Current machines, M. G. Say, CBS publishers.
2. Performance & Design of DC machines A.E Clayton & Hancock ELBS Publication.
3. Electrical Machines Ashfaq Hussain, Dhanpat Rai Publications 2003 Edition.
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Reference Books |
1. Electrical machines-Nagarath & DP Kothari, 2nd edition, TMH.
2. Theory of alternating -current machines. Alexander Langsdorf.
3. Electrical machinery- P.S Bhimbra, Khanna Publishers.
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