What is the importance of slip in 3 phase induction motor?

What is the importance of the slip?

Importance of Slip

The torque is directly proportional to the rotor current. Hence, torque is directly proportional to slip. The above equation shows that the torque induces on the rotor is directly proportional to the slip of the induction motor. The high value of slip induces the emf in the rotor.

What is slip in 3 phase induction?

Slip in Induction Motor is the relative speed between the rotating magnetic flux and rotor expressed in terms of per unit synchronous speed. It is a dimensionless quantity. The value of slip in induction motor is can never be zero.

What is slip power and its significance?

The slip power recovery (SPR) drive is an external system connected to the rotor circuit in place of the external resistors. The SPR provides speed and torque control like the resistors but can also recover the power taken off the rotor and feed it back into the power system to avoid energy waste.

What is slip in induction motor?

“Slip” in an AC induction motor is defined as:

As the speed of the rotor drops below the stator speed, or synchronous speed, the rotation rate of the magnetic field in the rotor increases, inducing more current in the rotor’s windings and creating more torque.

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What is slip and slip speed in induction motor?

Slip and slip speed of an induction are used to define the relative motion of the rotor and magnetic fields. The slip speed of an induction motor is defined as the difference between synchronous speed and rotor speed.

What is the value of slip at starting?

The difference between synchronous and actual speed of the rotor is called slip. 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.