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Assuming that you are asking about an induction type AC motor then the synchronous rotor speed (Ns) in rpm: Ns = (120 x f) / p where f is frequency and p is the number of poles Unless the motor is a synchronous motor then there is some slip that occurs. %Slip = (Ns - N)/Ns x 100 For instance a typical general purpose 460V 3 phase 10 hp 60 hz motor has a nameplate speed of 1765 rpm. The synchronous speed of this motor would be 1800 rpm as it has 4 poles: Ns = (120 x 60) / 4 = 1800 rpm %Slip = (1800 - 1765)/1800 x 100 = 1.94% slip. Generally speaking the higher the synchronous speed the higher the slip%.
What else can I help you with?
What do electric generators and electric motors have in common?
Stator and rotor
What happen when slip ring induction motor overloaded?
Let me give you a different yet convincing answer, as you over load the machine, it will run slow to get more induced emf in rotor, we all agree to a point that,as it slows down it will have more emf but as the electrical angle increases beyond 90, for slipring machine with no automatically induced poles unlike cage rotor, this deter the flux bonding between stator and rotor , As already loaded , this is a cumulative action there by machine stalls, Do let me know if you need further explanation.
Why is the number of poles of stator and rotor same in induction machine?
The number of poles on stator and rotor is always the same. If they are not equal?æno torque will be produced, thus, the machine will not function.?æ
How the slip vary with load?
The slip vary with load is a AC electric motor which the electric current in the rotor needed to make torque that is induced by electromagnetic induction. It does not repair mechanical commutation parts the energy and transferred from stator to rotor.
When was the first electric milking machine invented?
first milkng machine scotland
Which flying machine hs a rotor and a propeller?
A flying machine with a rotor an a propeller is a helicopter
What is the rotor head for?
The rotor head changes the angle of incidence of the rotor blades as they rotate.
What rotates on an electric motor?
The part that rotates inside of an electric motor is called the rotor.
What is palindrome for part of a machine that turns or rotates?
The word rotor is used to refer to a rotating part of a machine. It is also a palindrome.
What has the author Jussi Huppunen written?
Jussi Huppunen has written: 'High-speed solid-rotor induction machine' -- subject(s): Electric motors, Induction, Induction Electric motors, Mathematical models
What is the rotating coil in an electric motor called?
The part that rotates inside of an electric motor is called the rotor.
What do electric generators and electric motors have in common?
Stator and rotor
What is mean by rotor in machines?
a ROTOR is basically any part of a machine that rotates. eg the armature in a motor a STATOR is the part of a machine that is stationary. ie the ROTOR revolves within the STATOR
How do you resurface a rotor?
The rotor will have to be removed from the car. It can be resurfaced by mounting it on a special machine that slowly removes metal from the rotor until the rotor is smooth.
What is blade pitch of a helicopter?
The angle of the rotor blades.
Why do helicopters have a small rotor of their tail?
That is to stabilise the inherent spin of the main rotor and to steer the machine.
What happen when slip ring induction motor overloaded?
Let me give you a different yet convincing answer, as you over load the machine, it will run slow to get more induced emf in rotor, we all agree to a point that,as it slows down it will have more emf but as the electrical angle increases beyond 90, for slipring machine with no automatically induced poles unlike cage rotor, this deter the flux bonding between stator and rotor , As already loaded , this is a cumulative action there by machine stalls, Do let me know if you need further explanation.
