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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

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Q: Why is a synchronous speed motor considered a constant speed motor?
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Related questions

What is a synchronous motor?

Synchronous motors are those that run only at Synchronous speed ie.. constant speed.


What is slip of synchronous motor?

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


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.


What is the slip of synchronous motor?

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


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.


Difference between synchronous and asynchronous motors?

1)Synchronous motors are those that run only at Synchronous speed i.e. constant speed. But Motor can run in various speeds. 2)Synchronous motors runs at same speed of magnetic filed. but if one consider case of induction motor the rotor rotates at different speed than revolving magnetic field. there is slip between field and rotor.


If a three phase induction motor runs at a speed greater than synchronous speed?

When an induction motor is pushed over synchronous speed it will become a generator and will deliver power back to the utility.


Why is the speed of synchronous motor is more then induction motor?

Synchronous motors run at synchronous speed. An induction motor that has the same number of poles must run at a sub-synchronous speed to create a second magnetic field (a field that is at a different phase angle) to generate torque.


What factors determine the synchronous speed of an AC motor?

Number of poles and supply freqency determines speed of synchronous motor. For speed control of such motors Variable Freqency Drives(VFD) are used.


What type of machine that use asynchronous motor?

Typically a synchronous motor is applied in constant speed applications where the higher cost of the motor is offset by the improved power factor realized


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.


Speed of the stator field of an Induction motor is?

synchronous speed