Multiphysical model calculation of boundary current welding contact vacuum circuit breakers
Journal Title: Вісник Національного технічного університету "ХПІ". Серія: Проблеми удосконалювання електричних машин і апаратів. Теорія і практика - Year 2014, Vol 41, Issue 1084
Abstract
A multiphysical model of alteration of the strength bodies’ contact area as a function of the contact surface temperature is considered. Mathematical formulation of the problem is described, an example of the welding sustaining current is presented. The developed model is based on the complex calculation by the theory of elasticity and thermal conductivity. A dependence of contact pressures and contact area dimensions as a function of temperature is shown. It is determined that the contact area temperature depends essentially on the temperature of distant points at emergency over-currents. The developed technique can be used to assess and calculate the electrical apparatus thermal resistance.
Authors and Affiliations
E. I. Baida
Keywords
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