Optimal modelling of planar thermal converter device

The root mean square (rms) measurement of alternating voltage of any waveform is frequently done by means of thermal transfer instruments. The principle of these thermal rms converters is to transfer the heating energy of resistive load to a temperature-sensing element. The dc voltage output of the sensor reflects the amount of electrical power (ac or dc) applied to the input. This paper is addressing the modelling of a thermal converter device in planar technology using finite element platform. The original approach of this study capitalizes on introduction of a resistive thermal sensing element of a planar type to provision the thermal-conversion response to the active power dissipated on the 3D stratified non-reactive heater structure. Through iterative multi-physics simulations, model properties and dimensions have been evaluated and optimized.