A synchronous motor can develop synchronous torque?

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asked Mar 20, 2018 by anonymous

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asked Mar 18, 2018 by anonymous

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.

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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?

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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.

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asked Mar 18, 2018 by anonymous

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.

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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.

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asked Mar 18, 2018 by anonymous

A synchronous motor can be made self starting by providing?

Last answer: A synchronous motor can be made self-starting by providing damper bar.

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asked Mar 18, 2018 by anonymous

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.

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183 views 1 answer

asked Mar 18, 2018 by anonymous

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.

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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

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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.

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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%.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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55 views 1 answer

asked Mar 18, 2018 by anonymous

In a synchronous motor which losses varies with load?

Last answer: In a synchronous motor, copper losses varies with load.

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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.

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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.

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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.

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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.

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67 views 1 answer

asked Mar 18, 2018 by anonymous

Which motor have more efficiency, synchronous motor or induction motor?

Last answer: Synchronous motor has more efficiency.

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61 views 1 answer

asked Mar 18, 2018 by anonymous

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.

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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?

Last answer: If the load of the normally excited synchronous motor is increased the power factor will become lagging.

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79 views 1 answer

asked Mar 18, 2018 by anonymous

Hunting in synchronous motor cannot be due to?

Last answer: Hunting in synchronous motor cannot be due to windage friction.

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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?

Last answer: The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.

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69 views 1 answer

asked Mar 18, 2018 by anonymous

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.

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118 views 1 answer

asked Mar 18, 2018 by anonymous

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.

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144 views 1 answer

asked Mar 18, 2018 by anonymous

An unexcited single phase synchronous motor is ?

Last answer: An unexcited single-phase synchronous motor is reluctance motor.

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83 views 1 answer

asked Mar 18, 2018 by anonymous

The back emf of synchronous motor depends on?

Last answer: The back emf of synchronous motor depends on load angle.

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47 views 1 answer

asked Mar 18, 2018 by anonymous

Synchronous motor always runs at which speed?

Last answer: Synchronous motor always runs at synchronous speed.

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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?

Last answer: When excitation of an unloaded salient pole synchronous motor suddenly gets disconnected the motor will stop.

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270 views 1 answer

asked Mar 18, 2018 by anonymous

Three phase synchronous motor will have how many sliprings?

Last answer: Three phase synchronous motor will have two sliprings.

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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.

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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

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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.

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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.

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asked Mar 15, 2018 by anonymous

Why a dc series motor has a high starting torque?

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asked Mar 15, 2018 by anonymous

How can we improve power factor using synchronous motor?

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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.

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asked Apr 24, 2020 by anonymous

DC motor gross torque example

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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

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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.

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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.

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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.

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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

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asked May 8, 2018 by anonymous

Damper winding in a synchronous motor

Last answer: Damper winding in a synchronous motor Serves to start the motor.

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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

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378 views 1 answer

anonymous · Answer 1 · 2018-03-20T11:20:58+0000

answered Mar 20, 2018 by anonymous

A synchronous motor can develop synchronous torque at synchronous speed.

A synchronous motor can develop synchronous torque?

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