Operation reliability of induction motors at egg processing plant ‘Balticovo’
Latvia University of Agriculture, Faculty of Engineering, Institute of Energetics, J. Cakstes blvd. 5, LV-3001 Jelgava, Latvia; e-mail: aleksejs.gedzurs@llu.lv
Abstract:
In hen houses air quality plays an important role in egg production volume. However, failure of fan induction motors often occurs and it is important to improve reliability of these. A motor reliability study was conducted in the egg processing plant ‘Balticovo’ in Iecava. Results show that 86% of failed number from 2010–2015 occur in hen houses and more than 50% of them were failures of motors which drive the fan. Annual failure rate of fan induction motors each year was increasing and in 2015 it was 6%. Investigations of the faulty motors showed the following defects – stator turn to turn failure of stator winding insulation leadwire and stator winding insulation thermal stress and mechanical damage of stator core resulting in the damaged stator winding leading to a short circuit. Results show that conditions that could contribute to such defects are excessive heating and vibrations.
Key words:
egg processing plant, failure, fan, hen houses, induction motor, reliability