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Electrical Machines
In case of a compensated DC series motor, the compensating winding is provided
In parallel with the armature winding.
In parallel with the field winding.
In series with the armature winding.
As a separate unit.
In parallel with the armature winding.
In parallel with the field winding.
In series with the armature winding.
As a separate unit.
Answer
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Related Question
Electrical Machines
The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively
8.248 and 9.60 Ω.
8.248 and 5.54 Ω.
14.28 and 9.60 Ω.
14.28 and 5.54 Ω.
8.248 and 9.60 Ω.
8.248 and 5.54 Ω.
14.28 and 9.60 Ω.
14.28 and 5.54 Ω.
Answer
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Electrical Machines
If the excitation is increased, the power factor is
lagging power factor
leading power factor
unity power factor
None of these
lagging power factor
leading power factor
unity power factor
None of these
Answer
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Electrical Machines
In an induction motor, what is the ratio of rotor input to rotor copper loss?
1/(1-S)
1/S
S
1-S
1/(1-S)
1/S
S
1-S
Answer
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Electrical Machines
In IM the rotor lamination can be ________________ than stator laminations.
thicker.
sipper.
rotor can not have any laminations.
thinner.
thicker.
sipper.
rotor can not have any laminations.
thinner.
Answer
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Electrical Machines
What is the shunt resistance component equivalent circuit obtained by no load test of an induction motor representative of ?
core loss only
both 1 and 2
Copper loss
windage and friction loss
core loss only
both 1 and 2
Copper loss
windage and friction loss
Answer
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