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In electrical motors what is the slip?

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Question added by liaqat abbas , managemen asst. the electrical eng. , Q.E.W.C. (Qatar electricity and water co.)
Date Posted: 2014/08/29
Muhammad Aamir Abdul Majeed
by Muhammad Aamir Abdul Majeed , Plant Manager , Transfopower Industries

Slip

s = \\frac{n_s-n_r}{n_s}\\,Slip, s, is defined as the difference between synchronous speed and operating speed, at the same frequency, expressed in rpm or in percent or ratio of synchronous speed. Thus

where n_s is stator electrical speed, n_r is rotor mechanical speed. Slip, which varies from zero at synchronous speed and1 when the rotor is at rest, determines the motor's torque. 

Deleted user
by Deleted user

The slip in an electrical motor is the differnce betrween the synchronous speed (ns)and the rotor speed (nr) ,

%slip=[ (ns-nr)/(nr)]*100

Ahmed Salah
by Ahmed Salah , Head of Electrical DEP. , SAMAMA OPERATION&MAINTENACE

slip is the diffrence between rotor speed and synchronous speed

Deleted user
by Deleted user

it is the start up ramp time

Deleted user
by Deleted user

Slip can be defined as "the speed by which the stator field moves ahead of the rotor speed.". Normally denoted by the variable"s". it is a unit less value, expressed in percentage.

Niraj Mani
by Niraj Mani , Electrical Engineer , HPCL Biofuels ltd.

slip is a ratio between shaft rotation speed and synchronous magnetic field speed..

slip  change with voltage, frequency,rotor impedance and inductive reactance..

 

With Regards

Niraj Mani

asif mahmood
by asif mahmood , Electrical Design Engineer , Ministry of Defense

Slip is the ration of difference of synchonous speed and rotor speed to synchronous speed.

 

Slip= Ns-Nr/Ns

Ali Waqas Bhatti
by Ali Waqas Bhatti , Electrical Engineer , Lakson Group of Companies

The difference between Synchronous Speed & Rotating speed is called Slip

mohamed eliwa
by mohamed eliwa , instrument and control engineer , egyptian maintenance company 'emc'

Difference between rotor speed and synchronous speed( (synchronous speed -rotor speed)/rotor speed)

LABIB KOOLI
by LABIB KOOLI , Director of the Sectoral Center for Training in Hotel Technologies at Southern Hammamet , Tunisian Vocational Training Agency (ATFP)

I'm agree with you all 

Ahmed Fuad Mohammed  Humaid
by Ahmed Fuad Mohammed Humaid , Free Works , work for myself

 The SLIP: is the ratio between (the difference between the Stator Speed "Synchronous Speed" and the Rotor speed) TO the stator speed "Synchronous Speed".

 

S=(Stator Speed - Rotor Speed) / Stator Speed

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