The control of the power semiconductors in a three-level NPC topology employs a set of 12 control signals in total. A back-to-back two-level/three-level inverter has been built to circulate power performing arbitrary load conditions to analyse the thermal dissipation of the power semiconductors. This thermal analysis utilises an IR camera to perform an in-situ measurement and allows precise mod...

For the first time, 3D multiphysics finite element modelling has been used to optimise the geometry of a calorimetric thermal flow sensor. The model involves and couples three physics domains: electric, thermal and fluid mechanics. The model is validated against experimental data obtained from a thermoelectronic flow sensor comprising of a tungsten heating resistor and temperature sensing diode...

DC thermal effects modelling for nanometric silicon-on-insulator (SOI) and bulk fin-shaped field-effect transistors (FinFETs) is presented. Among other features, the model incorporates self-heating effects (SHEs), velocity saturation and short-channel effects. SHEs are analysed in depth by means of thermal resistances, which are determined through an equivalent thermal circuit, accounting for t...

In this study, infrared thermography is used to measure the temperature response of integrated on silicon spiral inductors to a unit step electrical signal used to excite the samples. The measurements are performed with the use of high speed infrared equipment. The thermal impedance is then extracted from the transient temperature response. Finally, an attempt is made to model the thermal netwo...

This paper proposes a thermal study of the catenary/pantograph interface for a train in motion. A 2.5D complex model of the pantograph strip has been defined and created by a coupling between a 1D and a 2D model. Experimental and simulation results are presented and with a comparison allow validating the 2.5D model. Some physical phenomena are described and presented with the help of the model ...

In this paper, we present a comparative study that focus on Supercapacitor (SC) thermal cycling and calendar ageing under constant voltage tests. The impacts of cycling temperature on SC performance and degradation rate are studied. Obtained results from thermal cycling ageing test are compared with those coming from simple calendar ageing test at constant voltage and constant temperature. The ...

Flow effects on the thermal loading in different optofluidic systems (optical trap and various microfluidic channels) have been systematically explored by using dye-based ratiometric luminescence thermometry. Thermal images obtained by fluorescence microscopy demonstrate that the flow rate plays a key role in determining both the magnitude of the laser-induced temperature increment and its spat...

Computer models used to predict building heating and cooling energy and occupant thermal comfort at present rely on climate data collected at a remote meteorological station. No account is taken of the changes in meteorological conditions caused by the urban developments, yet it is known the differences can be important. This paper reports on a project aimed at the development of a computer sim...

Modelling of the effects of materials' microstructure on thermal transport is an essential tool for materials design, and is particularly relevant for thermoelectric (TE) materials converting heat into electrical energy. Precipitates dispersed in a TE matrix act as phonon-scattering centers, thereby reducing thermal conductivity. We introduce a practical approach to tailor a definite precipitat...