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Zbornik radova, Elektrotehnički institut "Nikola Tesla"
2014, iss. 24, pp. 157-168
article language: Serbian
document type: Professional Paper
published on: 12/12/2014
doi: 10.5937/zeint24-6890
Analytical method for determining breakdown slip of an induction motor based on of five parameters
aElektrotehnička škola 'Stari grad', Beograd
bUniversity of Belgrade, Electrical Engineering Institute 'Nikola Tesla'

e-mail: nploewenstein@gmail.com, zarko.janda@gmail.com

Abstract

The paper proposes an explicite formula for determining the critical slip value of an induction squirel cage motor based upon five parameters. Three of these parameters - rated slip, rated and breakdown torque are known by catalogue data. Two missing parameters are the arbitrary slip between the rated and critical slip value and the corresponding torque value. These two parameters are to be experimentaly obtained. The breakdown torque value given by catalogue data is usually less accurate than the rated torque value. The proposed formula gives the possibility of analysing the error distribution of the critical slip value obtained from catalogue and measured data in comparison with the values obtained from the mechanical characteristic based on the physical parameters of an induction motor.

Keywords

breakdown slip; breakdown torque; rated torque; rated slip; induction motor; mechanical characteristic

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