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A synchronous motor can operate as either a Generator or a Motor.

When a synchronous motor has current applied to the windings on its rotor and the stator is energized with say a 50hz line supply (with little or no physical load) then the exact amount of excitation provided by the rotor can determine whether the stator displays inductive or capacitive properties.

If the rotor is under excited (too Little rotor current) the Synchronous Motor will behave as an Inductor, however if the rotor is over excited then the Synchronous Motor will behave like a Capacitor.

Hope this helps

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Monica Abbott

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Q: Why synchronous motor is called synchronous capacitors?
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Why the DC motor is call as synchronous motor?

A 60Hz synchronous motor spins at synchronous speed - if it's a two pole motor it will spin at exactly 1800 rpms. An asynchronous motor will spin at a speed lower than the power supply frequency - a symilar asynchronous motor may spin at 1700 rpms.


Why synchronous motor called double excited motor?

AC and DC supply sources we are given to motor so we are called double excited motor


Which motor rotate above synchronous speed?

An induction motor rotating at higher than synchronous speed would be generating power, thus would be a generator. No motor operating as a motor runs above synchronous speed.


How synchronous motor can function as a synchronous condenser?

If a motor is spinning under no load, it is storing some energy in the rotating mass. This energy can be stored and released in the same way capacitors and inductors store and release energy. This is what a synchronous motor acting like a condenser is doing. The way it appears to the power system is dependent upon the field current applied to it. If used as a motor, this is controlled to keep it spinning at the desired speed under load. If used as a condenser, it is controlled to determine whether it will be releasing power ahead of or behind the power system (absorbing or releasing VARs).


Is a 3 phase motor a Synchronous motor?

A synchronous motor can be a type of 3-Phase AC motor, or not.A synchronous motor is defined by the period of the rotor being synchronized with the frequency of the stator windings' current. The stator windings might be 3-Phase or not (2-Phase would work).Also synchronous motors are not the only type of 3-Phase AC motors. An induction motor could also be 3-Phase AC and has a few advantages and disadvantages over a synchronous motor.

Related questions

What is a 3 phase motor that can run with a slip of zero called?

Synchronous motor


What is synchronous machein?

mainly alternator,synchronous motor comes under the synchronous machine.a synchronous motor is not a self starting motor.if a synchronous motor moves with more than synchronous speed then it acts as a synchronous generator.


What is difference between synchronous motor and synchronous condenser?

a synchronous condenser is over excited synchronous motor under no load


Why the DC motor is call as synchronous motor?

A 60Hz synchronous motor spins at synchronous speed - if it's a two pole motor it will spin at exactly 1800 rpms. An asynchronous motor will spin at a speed lower than the power supply frequency - a symilar asynchronous motor may spin at 1700 rpms.


What is slip of synchronous motor?

A synchronous motor runs at synchronous speed, so there is no slip, or zero slip.


Why synchronous motor called double excited motor?

AC and DC supply sources we are given to motor so we are called double excited motor


What is the slip of synchronous motor?

A synchronous motor runs at synchronous speed, so there is no slip, or zero slip.


Where can Ibuy a TYC42 12v synchronous motor?

where can I buy a TYC50-12 synchronous motor for a fibre optic christmas tree


Which motor rotate above synchronous speed?

An induction motor rotating at higher than synchronous speed would be generating power, thus would be a generator. No motor operating as a motor runs above synchronous speed.


How can you use a synchronous motor as a synchronous genarator?

to use prime mover


Similarity of induction motor and synchronous motor?

motor cyc


Why is a synchronous speed motor considered a constant speed motor?

synchronous motor is a constant speed motor because it will only run at a synchronous speed or not at all.the speed can be changed by changiing the frequency only ns=120f/p