Discuss
menu
search
person
Login
Register
search
edit
Ask a Question
Discuss
All Activity
Q&A
Questions
Hot!
Unanswered
Tags
Users
Ask a Question
Other
A synchronous motor can develop synchronous torque?
asked
Mar 20, 2018
by
anonymous
synchronous
motor
develop
torque
thumb_up_alt
0
like
thumb_down_alt
0
dislike
76
views
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
answered
Mar 20, 2018
by
anonymous
A synchronous motor can develop synchronous torque
at synchronous speed.
thumb_up_alt
0
like
thumb_down_alt
0
dislike
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
Mar 18, 2018
by
anonymous
The synchronous motor will develop maximum power when the load angle is?
The synchronous motor will develop maximum power when the load angle is?
Last answer:
The synchronous motor will develop maximum power when the load angle is 900.
synchronous
motor
develop
maximum
power
load
angle
thumb_up_alt
0
like
thumb_down_alt
0
dislike
80
views
1
answer
asked
Mar 20, 2018
by
anonymous
The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor...
The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor, at rated stator supply voltage and frequency, is known as?
maximum
torque
synchronous
motor
rated
stator
supply
voltage
frequency
thumb_up_alt
0
like
thumb_down_alt
0
dislike
86
views
0
answers
asked
Mar 20, 2018
by
anonymous
The maximum constant load torque under which a synchronous motor will pull into synchronism...
The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as?
Last answer:
The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as pull-in torque.
maximum
constant
load
torque
synchronous
motor
synchronism
rated
rotor
supply
voltage
frequency
thumb_up_alt
0
like
thumb_down_alt
0
dislike
213
views
1
answer
asked
Mar 18, 2018
by
anonymous
What is the maximum value of torque angle in synchronous motor?
What is the maximum value of torque angle in synchronous motor?
Last answer:
The maximum value of torque angle in synchronous motor is 90 degrees electrical.
maximum
torque
angle
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
698
views
1
answer
asked
Mar 20, 2018
by
anonymous
The operating speed of a synchronous motor can be changed to new fixed value by?
Last answer:
The operating speed of a synchronous motor can be changed to new fixed value by changing frequency.
operating
speed
synchronous
motor
fixed
value
thumb_up_alt
0
like
thumb_down_alt
0
dislike
83
views
1
answer
asked
Mar 18, 2018
by
anonymous
A synchronous motor can be made self starting by providing?
A synchronous motor can be made self starting by providing?
Last answer:
A synchronous motor can be made self-starting by providing damper bar.
synchronous
motor
made
self
starting
thumb_up_alt
0
like
thumb_down_alt
0
dislike
93
views
1
answer
asked
Mar 18, 2018
by
anonymous
How can we reverse the direction of rotation of synchronous motor?
How can we reverse the direction of rotation of synchronous motor?
Last answer:
By reversing supply phase sequence we can reverse the direction of rotation of synchronous motor.
reverse
direction
rotation
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
183
views
1
answer
asked
Mar 18, 2018
by
anonymous
Can we use the synchronous motor as the synchronous capacitor?
Can we use the synchronous motor as the synchronous capacitor?
Last answer:
Yes, we can use the synchronous motor as the synchronous capacitor when the synchrnous motor is overexcited.
use
synchronous
motor
capacitor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
76
views
1
answer
asked
Apr 28, 2018
by
anonymous
Torque angle for the synchronous machine is the angle between
Torque angle for the synchronous machine is the angle between (A) stator magnetic field and rotor magnetic field (B) stator magnetic field and net magnetic field in the air gap (C) rotor magnetic field and net magnetic field in the air gap (D) excitation voltage and impedance voltage drop
Last answer:
Torque angle for the synchronous machine is the angle between rotor magnetic field and net magnetic field in the air gap
torque
angle
synchronous
machine
thumb_up_alt
0
like
thumb_down_alt
0
dislike
71
views
1
answer
asked
Mar 20, 2018
by
anonymous
Slip-rings in a synchronous motor carry?
Last answer:
Slip-rings in a synchronous motor carry direct current.
slip-rings
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
75
views
1
answer
asked
Mar 20, 2018
by
anonymous
The efficiency of a properly designed synchronous motor will usually fall in range?
Last answer:
The efficiency of a properly designed synchronous motor will usually fall in range 85 to 95%.
efficiency
designed
synchronous
motor
usually
range
thumb_up_alt
0
like
thumb_down_alt
0
dislike
55
views
1
answer
asked
Mar 20, 2018
by
anonymous
A synchronous motor has better power factor as compared to that of an equivalent induction motor...
A synchronous motor has better power factor as compared to that of an equivalent induction motor. This is mainly because?
Last answer:
A synchronous motor has better power factor as compared to that of an equivalent induction motor. This is mainly because stator supply is not required to produce magnetic field.
synchronous
power
factor
equivalent
induction
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
86
views
1
answer
asked
Mar 20, 2018
by
anonymous
A synchronous motor running with normal excitation adjusts to load increases essentially by increase in?
Last answer:
A synchronous motor running with normal excitation adjusts to load increases essentially by increase in armature current.
synchronous
motor
running
normal
excitation
load
thumb_up_alt
0
like
thumb_down_alt
0
dislike
87
views
1
answer
asked
Mar 20, 2018
by
anonymous
In case one phase of a three-phase synchronous motor is short-circuited the motor will?
Last answer:
In case one phase of a three-phase synchronous motor is short-circuited the motor will not start.
one
phase
three-phase
synchronous
motor
short-circuited
thumb_up_alt
0
like
thumb_down_alt
0
dislike
171
views
1
answer
asked
Mar 20, 2018
by
anonymous
In a synchronous motor, the armature current has large values for?
Last answer:
In a synchronous motor, the armature current has large values for high and low excitation.
synchronous
motor
armature
current
thumb_up_alt
0
like
thumb_down_alt
0
dislike
88
views
1
answer
asked
Mar 20, 2018
by
anonymous
The size of a synchronous motor decreases with the increase in?
Last answer:
The size of a synchronous motor decreases with the increase in flux density.
size
synchronous
motor
decreases
increase
thumb_up_alt
0
like
thumb_down_alt
0
dislike
132
views
1
answer
asked
Mar 20, 2018
by
anonymous
The duration of sudden short-circuit test on a synchronous motor is usually about?
Last answer:
The duration of sudden short-circuit test on a synchronous motor is usually about one second.
short-circuit
test
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
113
views
1
answer
asked
Mar 20, 2018
by
anonymous
The construction of a synchronous motor resembles?
Last answer:
The construction of a synchronous motor resembles an alternator.
construction
synchronous
motor
resembles
thumb_up_alt
0
like
thumb_down_alt
0
dislike
55
views
1
answer
asked
Mar 18, 2018
by
anonymous
In a synchronous motor which losses varies with load?
In a synchronous motor which losses varies with load?
Last answer:
In a synchronous motor, copper losses varies with load.
synchronous
motor
losses
varies
load
thumb_up_alt
0
like
thumb_down_alt
0
dislike
62
views
1
answer
asked
Mar 20, 2018
by
anonymous
If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will?
Last answer:
If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will stop.
field
winding
unloaded
salient
pole
synchronous
motor
open
circuited
thumb_up_alt
0
like
thumb_down_alt
0
dislike
115
views
1
answer
asked
Mar 20, 2018
by
anonymous
The coupling angle or load angle of synchronous motor is defined as the angle between the?
Last answer:
The coupling angle or load angle of synchronous motor is defined as the angle between the rotor and the stator poles of opposite polarity.
coupling
angle
load
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
135
views
1
answer
asked
Mar 20, 2018
by
anonymous
If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then?
Last answer:
If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then the stator current will be zero.
synchronous
motor
synchronised
supply
running
load
negligible
loss
thumb_up_alt
0
like
thumb_down_alt
0
dislike
87
views
1
answer
asked
Mar 20, 2018
by
anonymous
The armature current of the synchronous motor?
Last answer:
The armature current of the synchronous motor has large values for low and high excitation.
armature
current
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
67
views
1
answer
asked
Mar 18, 2018
by
anonymous
Which motor have more efficiency, synchronous motor or induction motor?
Which motor have more efficiency, synchronous motor or induction motor?
Last answer:
Synchronous motor has more efficiency.
efficiency
synchronous
induction
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
61
views
1
answer
asked
Mar 18, 2018
by
anonymous
If we change the excitation of synchronous machine will it affect on motor speed?
If we change the excitation of synchronous machine will it affect on motor speed?
Last answer:
No, If we change the excitation of synchronous machine it will not affect on motor speed.
change
excitation
synchronous
machine
affect
motor
speed
thumb_up_alt
0
like
thumb_down_alt
0
dislike
68
views
1
answer
asked
Mar 18, 2018
by
anonymous
If the load of the normally excited synchronous motor is increased the power factor will?
If the load of the normally excited synchronous motor is increased the power factor will?
Last answer:
If the load of the normally excited synchronous motor is increased the power factor will become lagging.
load
normally
excited
synchronous
motor
increased
power
factor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
79
views
1
answer
asked
Mar 18, 2018
by
anonymous
Hunting in synchronous motor cannot be due to?
Hunting in synchronous motor cannot be due to?
Last answer:
Hunting in synchronous motor cannot be due to windage friction.
hunting
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
74
views
1
answer
asked
Mar 18, 2018
by
anonymous
The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
Last answer:
The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.
synchronous
motor
leading
power
factor
drive
mechanical
load
thumb_up_alt
0
like
thumb_down_alt
0
dislike
69
views
1
answer
asked
Mar 18, 2018
by
anonymous
The damping winding in synchronous motor is generally used to?
The damping winding in synchronous motor is generally used to?
Last answer:
The damping winding in synchronous motor is generally used to provide starting torque and prevent hunting.
damping
winding
synchronous
motor
used
thumb_up_alt
0
like
thumb_down_alt
0
dislike
118
views
1
answer
asked
Mar 18, 2018
by
anonymous
If the field of synchronous motor is under excited, power factor will be?
If the field of synchronous motor is under excited, power factor will be?
Last answer:
If the field of synchronous motor is under excited, power factor will be lagging.
field
synchronous
motor
excited
power
factor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
144
views
1
answer
asked
Mar 18, 2018
by
anonymous
An unexcited single phase synchronous motor is ?
An unexcited single phase synchronous motor is ?
Last answer:
An unexcited single-phase synchronous motor is reluctance motor.
unexcited
single
phase
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
83
views
1
answer
asked
Mar 18, 2018
by
anonymous
The back emf of synchronous motor depends on?
The back emf of synchronous motor depends on?
Last answer:
The back emf of synchronous motor depends on load angle.
back
emf
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
47
views
1
answer
asked
Mar 18, 2018
by
anonymous
Synchronous motor always runs at which speed?
Synchronous motor always runs at which speed?
Last answer:
Synchronous motor always runs at synchronous speed.
synchronous
motor
always
runs
speed
thumb_up_alt
0
like
thumb_down_alt
0
dislike
55
views
1
answer
asked
Mar 18, 2018
by
anonymous
what will happen when excitation of an unloaded salient pole synchronous motor suddenly gets disconnected?
what will happen when excitation of an unloaded salient pole synchronous motor suddenly gets disconnected?
Last answer:
When excitation of an unloaded salient pole synchronous motor suddenly gets disconnected the motor will stop.
excitation
unloaded
salient
pole
synchronous
motor
disconnected
thumb_up_alt
0
like
thumb_down_alt
0
dislike
270
views
1
answer
asked
Mar 18, 2018
by
anonymous
Three phase synchronous motor will have how many sliprings?
Three phase synchronous motor will have how many sliprings?
Last answer:
Three phase synchronous motor will have two sliprings.
three
phase
synchronous
motor
slipring
thumb_up_alt
0
like
thumb_down_alt
0
dislike
63
views
1
answer
asked
May 8, 2018
by
anonymous
In a double squirrel cage induction motor, good starting torque is produced as
In a double squirrel cage induction motor, good starting torque is produced as (A) Large current flows through the outer high resistance winding. (B) Large current flows through the inner high resistance winding. (C) Small current flows through the outer high resistance winding. (D) Large current flows through the inner low resistance winding.
Last answer:
In a double squirrel cage induction motor, good starting torque is produced as Large current flows through the outer high resistance winding.
double
squirrel
cage
induction
motor
starting
torque
thumb_up_alt
0
like
thumb_down_alt
0
dislike
92
views
1
answer
asked
Apr 29, 2018
by
anonymous
Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to
Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be
Last answer:
Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be 25 N -m
torque
three-phase
induction
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
87
views
1
answer
asked
Mar 20, 2018
by
anonymous
Torque developed by a D.C. motor depends upon?
Last answer:
Torque developed by a D.C. motor depends upon magnetic field, active length of the conductor, current flow through the conductors, number of conductors, radius of armature.
torque
developed
dc
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
249
views
1
answer
asked
Mar 20, 2018
by
anonymous
Speed torque characteristic of a repulsion induction motor is similar to that of a D.C.?
Last answer:
Speed torque characteristic of a repulsion induction motor is similar to that of a D.C. compound motor.
speed
torque
characteristic
repulsion
induction
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
68
views
1
answer
asked
Mar 15, 2018
by
anonymous
Why a dc series motor has a high starting torque?
Why a dc series motor has a high starting torque?
dc
series
motor
high
starting
torque
thumb_up_alt
0
like
thumb_down_alt
0
dislike
63
views
0
answers
asked
Mar 15, 2018
by
anonymous
How can we improve power factor using synchronous motor?
How can we improve power factor using synchronous motor?
improve
power
factor
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
60
views
0
answers
asked
Mar 6, 2018
by
anonymous
Can we make power factor of synchronous motor leading by adjusting its excitation?
Last answer:
Yes, we can make the power factor of synchronous motor leading by adjusting its excitation.
power
factor
synchronous
motor
leading
adjusting
excitation
thumb_up_alt
0
like
thumb_down_alt
0
dislike
83
views
1
answer
asked
Apr 24, 2020
by
anonymous
DC motor gross torque example
DC motor gross torque example
Last answer:
.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
dc
motor
gross
torque
example
thumb_up_alt
0
like
thumb_down_alt
0
dislike
110
views
2
answers
asked
Apr 28, 2018
by
anonymous
The torque developed by any 3-phase induction motor at 0.8 p.u. slip is
The torque developed by any 3-phase induction motor at 0.8 p.u. slip is (A) Full-load torque (B) unstable torque (C) starting torque (D) break down
Last answer:
The torque developed by any 3-phase induction motor at 0.8 p.u. slip is unstable torque
torque
induction
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
2.8k
views
1
answer
asked
Mar 20, 2018
by
anonymous
The armature torque of the D.C. shunt motor is proportional to?
Last answer:
The armature torque of the D.C. shunt motor is proportional to armature current.
armature
torque
dc
shunt
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
86
views
1
answer
asked
Mar 20, 2018
by
anonymous
For the same H.P. rating and full load speed, following motor has poor starting torque?
Last answer:
For the same H.P. rating and full load speed, following motor has poor starting torque differentially compounded.
hp
rating
full
load
speed
motor
poor
starting
torque
thumb_up_alt
0
like
thumb_down_alt
0
dislike
113
views
1
answer
asked
Mar 20, 2018
by
anonymous
In repulsion motor, maximum torque is developed when?
Last answer:
In repulsion motor, maximum torque is developed when brush axis is at 45° electrical to the field axis.
repulsion
motor
maximum
torque
thumb_up_alt
0
like
thumb_down_alt
0
dislike
70
views
1
answer
asked
Sep 13, 2017
by
anonymous
which single phase induction motor has highest starting torque?
Last answer:
Capacitor start motor has high torque in starting
induction
motor
torque
starting
thumb_up_alt
0
like
thumb_down_alt
0
dislike
93
views
1
answer
asked
May 8, 2018
by
anonymous
Damper winding in a synchronous motor
Damper winding in a synchronous motor
Last answer:
Damper winding in a synchronous motor Serves to start the motor.
damper
winding
synchronous
motor
thumb_up_alt
0
like
thumb_down_alt
0
dislike
58
views
1
answer
asked
Apr 29, 2018
by
anonymous
In a self-controlled synchronous motor fed from a variable frequency inverter
In a self-controlled synchronous motor fed from a variable frequency inverter (1) the rotor poles invariably have damper windings (2) there are stability problems (3) the speed of the rotor decides stator frequency (4) the frequency of the stator decides the rotor speed
Last answer:
In a self-controlled synchronous motor fed from a variable frequency inverter the frequency of the stator decides the rotor speed
self-controlled
synchronous
motor
variable
frequency
inverter
thumb_up_alt
0
like
thumb_down_alt
0
dislike
378
views
1
answer
...