PART A(10*2=20)
1. Why a 3-phase synchronous motor
will always run at synchronous speed?
2. What are the
advantages of salient pole type of construction use for synchronous
machines?
3. Why are alternators rated in kVA
and not in kW?
4. Define distribution
factor.
5.What is meant by
load angle of an alternator?
6Define the term voltage
regulation of alternator
7.What does hunting of synchronous
motor mean?
8.What is synchronous condenser?
9.Write the
applications of synchronous motor.
PART B (16*5=80)
11.With
a neat sketch, explain the construction and working principle of alternator.
(16)
12.(i).What is armature reaction
? Explain briefly about armature reaction.(8)
(ii).Derive an emf equation of an
alternator. (8)
13.State and explain parallel
operation of alternators.(16)
14.(i).Explain V and inverted V curves as applied to synchronous motor.(6)
(ii). Describe the different methods of
starting of synchronous motor.(10)
15.(i).Draw and explain the phasor diagram of a synchronous motor operating at lagging
and leading
power factor.(10)
(ii). Give the principle of operation of
synchronus motor. (6)
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