[en] In a context in which electronics has become a key element in many of the strategic sectors of the surrounding companies (energy, railway sector, electric mobility, etc.), there is a common challenge for them and for the centres that work with them: many of the products do not come to fruition, or do so after many cycles of trial and error, because they cannot pass the tests associated with electromagnetic compatibility regulations. This thesis has sought to delve deeper into this area with the aim of increasing the level of training and service to these companies. In general terms, the work carried out has two parts. On the one hand, a preliminary and initial phase for setting up the EMI/EMC laboratory on the Galarreta campus with the commissioning of the equipment and the test bench, and learning the measurement methods and techniques related to the subject. Once this work has been carried out, this thesis work has proposed a methodology to estimate the conducted emissions of a converter by means of a behavioural model in the frequency domain. In order to define this model, experimental measurements (in the time domain) of the fundamental switching waves have been carried out, studying the sensitivity of noise generation to parameter variation. These signals have been the basis for defining the noise generators in the frequency domain. To obtain the estimate at the output of the system, the noise propagation paths have been characterised, using an indirect method consisting of the use of two inductive current probes which have allowed these paths to be modelled as impedance quadrupole paths for the common mode and the differential mode. A model has been completed which has been compared with the results obtained in the emission measurements conducted at the output of a LISN.

[eu] Elektronika gure inguruko enpresentzat giltzarri bihurtu da hainbat arlo estrategikotan (energia, trenbide-arloa, mugikortasun elektrikoa eta abar). Enpresa hauek erronka bati aurre egiten diote: beren produktuetako asko saiakuntza eta akats ziklo amaitezinaren ondoren merkaturatzen dira, kasurik onenean, bateragarritasun elektromagnetikoko frogak gainditzen lortzen ez dutelako. Tesi honen helburua arlo horretan sakontzea izan da, unibertsitatearen trebakuntza eta zerbitzu maila handitzeko helburuarekin. Oro har, egindako lanak bi zati izan ditu. Alde batetik, Galarretako campuseko EMI/EMC laborategia muntatzeko atariko eta hasierako fasea, ekipamendua eta saiakuntza-bankua abian jarrita, eta gaiarekin lotutako neurketa-metodoak eta -teknikak ikasita. Lan hori egin ondoren, tesi honek metodologia bat proposatu du, maiztasun eremuan portaerazko eredu baten bidez bihurgailu baten emisio gidatuak balioesteko. Eredu hori definitzeko, oinarrizko kommutazio-uhinen neurketa esperimentalak egin dira (denbora eremuan), eta zarata-iturriek parametroen aldaketarekiko duten sentikortasuna aztertu da. Seinale horiek izan dira maiztasun-eremuan zarata-sorgailuak definitzeko oinarria. Sistemaren irteerako estimazioa lortzeko, zarata hedatzeko bideak karakterizatu dira, eta, horretarako, zeharkako metodo bat erabili da: korronteko bi zunda induktibo erabili dira, bide horiek inpedantzia-kuadripolo gisa modelatzeko, modu komunerako eta modu diferentzialerako. Horrekin guztiarekin, eredu bat osatu da, LISN baten irteeran gidatutako emisioen neurketan lortutako emaitzekin kontrastatu dena.