1
|
Which are the main dimensions of rotating
machine?
|
2
|
Explain the terms : Electrical loading , Magnetic
loading
|
Electrical
loading
Electrical
loading = IZ
Where Z =
Number of conductors
Magnetic
loading
Magnetic
loading = pФ
Where Ф = flux
per pole
|
|
3
|
Explain the terms : Specific electrical loading,
Specific magnetic loading
|
Specific
electrical loading
Specific
electrical loading = IZ / πD
Where D = Diameter
of armature
Specific
magnetic loading
Specific
magnetic loading = pФ / πDL
Where D =
Diameter of armature and
L = Length of
armature
|
|
4
|
On which factors the output of rotating machine
depends?
|
The output of
the rotating machine depends upon specific electrical loading and specific
magnetic loading.
|
|
5
|
What is output coefficient?
|
Output
coefficient
|
|
6
|
Write the output coefficient equation for DC
machine and AC machine.
|
Output
coefficient equation
DC machine
AC machine
Where Kw
= Winding factor
|
|
7
|
Describe the relation between volume of machine
and output coefficient.
|
Relation
between volume and output coefficient
|
|
8
|
Describe the effect of specific electrical and
specific magnetic loading on the size of machine.
|
Size
of machine
|
|
9
|
On which factor the specific magnetic loading of
rotating machine depends?
|
The
specific magnetic loading of rotating machine depends upon
|
|
10
|
On which factor the flux density in the teeth
depends?
|
The
flux density in the teeth depends upon the specific magnetic loading.
|
|
11
|
At which portion of the tooth the maximum value
of flux density occurs?
|
Flux
density in the tooth
|
|
12
|
Give reason : The small machines have low
specific magnetic loading.
|
Specific
Magnetic Loading
|
|
13
|
Explain the term : Magnetic current
|
Magnetizing
current
|
|
14
|
Describe the effect of specific magnetic loading
on magnetizing current.
|
Effect
of specific magnetic loading on magnetizing current
|
|
15
|
Why the specific magnetic loading on induction
motor is kept low as compared to DC machines?
|
DC
machine
Induction
Motor
|
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