The student Javier Oyarzun Goyalde obtained an EXCELLENT

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The student Javier Oyarzun Goyalde obtained an EXCELLENT

THESIS

The student Javier Oyarzun Goyalde obtained an EXCELLENT

2024·11·11

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  • Thesis title: Diseño de una metodología para el diseño, simulación y validación de circuitos de alta frecuencia en convertidores de potencia

Court:

  • Presidency: Carlos Bernal Ruiz (Universidad de Zaragoza)
  • Vocal:Francisco José Pérez Cebolla (Universidad de Zaragoza)
  • Vocal: Igor Baraia-Etxaburu Zubiaurre (Ingeteam)
  • Vocal: José Manuel González Pérez (UPV/EHU)
  • Secretary:Iban Barrutia Inza (Mondragon Unibertsitatea)

Abstract:

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.