Transient nonlinear thermal runaway effects in carbon graphite electrical brushes

Abstract

A numerical analysis is formulated and used to determine the transient temperature fields associated with Joule heating of a cooled stationary electrical contact. The temperature field equations are developed using integral transforms, complex variables, and conformal transforms; approximate solutions are developed using finite-difference methods. Transient nonlinear temperature fields are obtained and compared with temperature fields obtained from linear and nonlinear studies. Thermal runaway effects are noticed and studied. >