Non-linear thermal simulation at system level: Compact modelling and experimental validation

In this work, a general methodology to extract compact, non-linear transient thermal models of complex thermal systems is presented and validated. The focus of the work is to show a robust method to develop compact and accurate non-linear thermal models in the general case of systems with multiple h...

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Vydané v:Microelectronics and reliability Ročník 80; s. 223 - 229
Hlavní autori: Bernardoni, Mirko, Delmonte, Nicola, Chiozzi, Diego, Cova, Paolo
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Elsevier Ltd 01.01.2018
Predmet:
Circuit simulation
Infrared measurements
Modelling
Simulation
Modelling
Simulation
Circuit simulation
Infrared measurements
ISSN:0026-2714, 1872-941X
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Popis
Shrnutí:In this work, a general methodology to extract compact, non-linear transient thermal models of complex thermal systems is presented and validated. The focus of the work is to show a robust method to develop compact and accurate non-linear thermal models in the general case of systems with multiple heat sources. A real example of such a system is manufactured and its thermal behaviour is analyzed by means of Infra-Red thermography measurements. A transient, non-linear Finite-Element-Method based model is therefore built and tuned on the measured thermal responses. From this model, the transient thermal responses of the system are calculated in the locations of interest. From these transient responses, non-linear compact transient thermal models are derived. These models are based on Foster network topology and they can capture the effect of thermal non-linearities present in any real thermal system, accounting for mutual interaction between different power sources. The followed methodology is described, verification of the model against measurements is performed and limitations of the approach are therefore discussed. The developed methodology shows that it is possible to capture strongly non-linear effects in multiple-heat source systems with very good accuracy, enabling fast and accurate thermal simulations in electrical solvers. •A robust method to develop compact thermal models based on Foster networks is shown.•The presented models are non-linear and time-dependent.•A method to handle multiple heat-sources is shown.•The method is validated against thermal measurements on a real system.
ISSN:0026-2714
1872-941X
DOI:10.1016/j.microrel.2017.12.005