Authors:
Anika Henke
and
Stephan Frei
Affiliation:
On-board Systems Lab, TU Dortmund University, Otto-Hahn-Str. 4, Dortmund, Germany
Keyword(s):
Analytical Approaches, Axial Heat Transfer, Green’s Functions, Intelligent Electronic Fuses, Laplace Transform, Smart Fuses, Thermal Cable Model, Transient Temperature Computation, Vehicle Cable Systems.
Abstract:
In modern intelligent vehicles, a huge number of components leads to complex cable harnesses with high reliability demands. Static connections protected by simple melting fuses are more and more replaced by intelligent power distribution and switching units. Thermal considerations play an important role with respect to reliability as thermal overload situations can lead to accelerated aging, damaged cables and finally to interruptions in the power supply. The calculation of the axial transient temperature distribution in cable structures is a complex task that is often solved numerically. In this paper, two analytical approaches to model the temperature of a single cable in air are presented, that are based on the use of Green’s functions in the time domain respectively Laplace domain. As sums appear, the convergence behavior is evaluated. The approaches are validated using a numerical reference solution. The influence of the cable length on the accuracy of the solutions is examined
and complexity considerations are performed. An application example for intelligent vehicles is presented and discussed.
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