What is the relation between the rotor mmf and stator mmf?

What is the relation between rotor mmf and stator mmf? Explanation: First the stator mmf is calculated. Then it is multiplied by 0.85 to obtain the rotor mmf.

What is the relative difference in speed between the rotor and the rotating magnetic field called?

This difference in speed depends upon load on the motor. i- The relative speed (Ns – N) is sometimes called slip speed. ii- Rotor (or Motor) speed is N = (1-s)Ns. iii- When the rotor is stationary (i.e., N=0), slip, s =1= 100 \%.

What provides the relative motion between the rotor and the stator fields in an induction motor?

In a synchronous generator, the stator magnetic field rotates behind the rotor magnetic field with respect to torque angle. It is the relative motion between the rotor magnetic field and the stator windings that allows the magnetic field of the rotor to produce current in the stator.

What is the formula for MMF for air gap for an induction motor?

According to the formula (3), the total value of MMF of the magnetic circuit is FΣ1=430+2·36+2·51+180+3,9=788 А. The saturation coefficient of the magnetic circuit is the ratio of the total MMF of the magnetic circuit FΣ to the total value of MMF of the magnetic circuit in the air gap Fδ.

What is the relation between the overload capacity and magnetizing current?

What is the relation between the overload capacity and magnetizing current? Explanation: Overload capacity is directly proportional to the magnetizing current. Overload capacity increases the magnetizing current and this increases the dispersion coefficient and this gives a poor power factor.

What is the relative speed of rotor field and stator field with respect to each other?

The speed of rotor field flux is synchronous speed (Ns) and the speed of the stator is zero as the stator doesn’t rotate. The relative speed between the rotor field and stator is synchronous speed and it is 1500 rpm.

Why does the rotor of a 3 phase induction motor rotate in the same direction as the rotating field?

Since the rotor circuit is closed, currents start flowing in the rotor conductors. Now, rotor conductors are carrying currents and are in the magnetic field. Therefore, mechanical force acts on the rotor, tending to move it in the same direction as the stator field.

What happens to the rotor of a 3 phase induction motor if its speed attains to synchronous speed *?

This in turn reduces rotor voltage, current and torque (it also reduces the frequency of the rotor current). If the rotor reached synchronous speed, there would be no movement of stator field relative to the rotor conductors, and no induced voltage, current or torque.

What will happen if the relative speed between the rotating flux of stator and rotor of the three phase induction motor is zero?

What will happen if the relation speed between the rotating flux of stator and rotor of the induction motor is zero? By varying the rotor resistance in the slip ring induction motor the maximum torque can be achieved at any desired slip or speed of.