MID SEM TEST SYLLABUS
SUBJECT : DESIGN
OF DC MACHINES AND TRANSFORMER
SUBJECT CODE : 2160912
SEMESTER
: 6TH
Ch – 1 :GENERAL DESIGN
ASPECTS:
Specific electric loading and Specific
magnetic loading;
Output coefficient; Output equations for
transformers and
rotating machines;Factors affecting size of
machines;
Criteria for selection of specific loadings;
Heating and
Cooling of Transformers and rotating
machines
Ch – 2 :DESIGN OF THREE PHASE
TRANSFORMER:
Types of
transformers; Position of HV and LV windings and
its importance; Relation between core and yoke
cross
section area
and its significance; Different types of transformer
windings; Different positions of taping;
Window space factor;
Factors affecting window space factor;
Relation between
emf per turn
and transformer rating; Stacking factor.
MAIN
DIMENSIONS:
Design of window dimensions, yoke dimensions and overall
core dimensions; Numerical examples.
DESIGN OF WINDINGS:
Design of HVand LV windings (No. of turns and area of
cross section); Selection of type of winding.
PERFORMANCE PARAMETERS
ESTIMATION:
Primary and secondary winding resistance and Leakage reactance
calculation; Calculation of no
load current, losses and temperature
rise of transformer;
Ch -3 : DESIGN OF DC
MACHINES:
Introduction; Output
equation; MMF calculation; Selection of
number of poles; Design of core length and
armature diameter;
Carter’s fringing curves and its significance;
Design of length
of air gap; Numerical
examples.
ARMATURE DESIGN:
Choice of armature
winding; Armature conductor; Number of
armature slots; Slot dimensions; Slot loading;
Design of armature
core; Numerical examples.
DESIGN OF FIELD SYSTEMS:
Pole design; Design of field winding of shunt, series and compound
machines;
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