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A synchronous motor running with normal excitation adjusts to load increases essentially by increase in?

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asked Mar 20, 2018 by anonymous

1 Answer

Answer :

A synchronous motor running with normal excitation adjusts to load increases essentially by increase in armature current.

answered Mar 20, 2018 by anonymous

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Related Questions

The effect of increasing load on a synchronous motor running with normal excitation is

The effect of increasing load on a synchronous motor running with normal excitation is (A) Increase both its Ia and power factor. (B) Decrease Ia, but increase power factor. (C) Increase Ia, but decrease power factor (D) Decrease both Ia and power factor.
Last Answer : The effect of increasing load on a synchronous motor running with normal excitation is Increase Ia, but decrease power factor

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In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load

In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load (A) The armature current increases and the power factor decreases (B) The armature ... but is lagging (D) The armature current decreases and the power factor increases and is leading
Last Answer : In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load The armature current decreases and the power factor increases and is leading

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asked Apr 29, 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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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.

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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.

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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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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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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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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.

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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.

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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.

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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.

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If we change the excitation of synchronous machine will it affect on power factor?

If we change the excitation of synchronous machine will it affect on power factor?
Last Answer : Yes, If we change the excitation of synchronous machine it will affect on power factor. If the synchronous motor is overexcited then it will have leading power factor and if the motor is underexcited then it will have lagging power factor.

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asked Mar 18, 2018 by anonymous

In synchronous motor, does the winding losses vary with load?

In synchronous motor, does the winding losses vary with load?
Last Answer : No, in the synchronous motor the winding losses do not vary with load.

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While keeping the excitation constant, if the steam supply of an alternator running in parallel with another

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Last Answer : While keeping the excitation constant, if the steam supply of an alternator running in parallel with another identical alternator is increased, then Its portion of share in load will increase

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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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For a D.C. shunt motor if the excitation is changed?

Last Answer : For a D.C. shunt motor if the excitation is changed torque will change but power will remain constant.

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Slip-rings in a synchronous motor carry?

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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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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?
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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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A synchronous motor can develop synchronous torque?

Last Answer : A synchronous motor can develop synchronous torque at synchronous speed.

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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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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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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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The construction of a synchronous motor resembles?

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If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will?

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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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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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Which motor have more efficiency, synchronous motor or induction motor?
Last Answer : Synchronous motor has more efficiency.

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How can we reverse the direction of rotation of synchronous motor?
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Hunting in synchronous motor cannot be due to?
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The damping winding in synchronous motor is generally used to?

The damping winding in synchronous motor is generally used to?
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A synchronous motor can be made self starting by providing?
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Can we use the synchronous motor as the synchronous capacitor?
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A three-phase synchronous motor connected to ac mains is running at full load and unity power factor.

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Draw and explain V and inverted V curves for synchronous motor.
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List different torques in synchronous motor.
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Damper winding in a synchronous motor

Damper winding in a synchronous motor
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In a self-controlled synchronous motor fed from a variable frequency inverter

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