Question: What is the value of the slip for an induction motor at no load and full load?

What is the value of slip at no load in induction motor?

Slip ≈ 0 when the rotor speed is almost equal to synchronous speed Ns. This is possible at no load.

What is the value of slip at full load?

The value of slip at full load varies from 6% in the case of a small motor and 2% in a large motor. The induction motor never runs at synchronous speed.

What is the value of slip in induction motor?

The slip value is equal to ‘1’ as the rotor in the motor is at rest & it will not equivalent to ‘0’. So while operating the motor, the synchronous speed is not equivalent to ‘N’ i.e, actual speed in a given time.

What is full load slip of induction motor?

While s = 0 given us N = Ns which is not possible for an induction motor. So slip of induction motor can not be zero under any circumstances. Practically motor operates in the slip range of 0.01 to 0.05 i.e. 1 % to 5 %. The slip corresponding to full load speed of th motor is called full load slip.

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What is the slip value at starting of the 3phase induction motor?

At start, slip of the motor is unity.

When the motor starts accelerating, the slip decreases and at the rated KW the slip of the motor is about 3–5 % of the synchronous speed of IM.

What will be the value of slip at maximum torque for an induction motor?

So, when slip s = R2 / X2, the torque will be maximum and this slip is called maximum slip Sm and it is defined as the ratio of rotor resistance to that of rotor reactance. NOTE: At starting S = 1, so the maximum starting torque occur when rotor resistance is equal to rotor reactance.

What is the slip at no load?

At no load, the rotor speed is very close to the synchronous speed. So, the slip, in this case, is very less. At full load, the rotor speed is less than that of no-load case. So, the slip, in this case, is greater than that of slip at no load.

What is slip in induction motor formula?

Slip speed is the speed difference between the Synchronous speed and Rotor speed. Slip speed = Synchronous speed – Rotor speed = Ns -N. Slip, s = (Ns – N) / Ns.

What happens when slip is zero?

Zero slip means that rotor speed is equal to synchronous speed. If rotor is rotating at synchronous speed in the direction of rotating magnetic field the, there will be no flux cutting action, no emf in the rotor conductors, no current in rotor bar conductor and hence no development of electromagnetic torque.

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What is the value of the slip of a three phase induction motor if the rotor runs at synchronous speed?

If the motor is running at synchronous speed, then the torque generated by the motor equal to zero. If the rotor runs at synchronous speed as the field of the stator, this will cause the slip to become zero, then there will be no torque generated in the rotor.

What is the slip?

Slip is the difference between an electrical induction motor’s synchronous and asynchronous speed.