Power converters in WBG device technology for automotive applications and characterization setups for GaN power transistors

Alemanno, Alessio (2023) Power converters in WBG device technology for automotive applications and characterization setups for GaN power transistors, [Dissertation thesis], Alma Mater Studiorum Università di Bologna. Dottorato di ricerca in Automotive per una mobilità intelligente, 35 Ciclo. DOI 10.48676/unibo/amsdottorato/11008.
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This PhD dissertation envisages the design of innovative power converters exploiting WBG devices to get state-of-the-art performance in products intended for industrial applications of automotive field. The collaborations with different specialized companies, provided the opportunity to access commercially-available state-of-the-art SiC and GaN technologies and the possibility to realize innovative converter prototypes. Concerning SiC technology, the complete design of a $350kW$ Battery Emulator instrument in collaboration with a company leader in the automotive testing sector, was carried out from scratch exploiting state-of-the-art SiC power-modules, planar magnetics and top-notch MCU technologies. Discrete high-voltage GaN switches were exploited in the Power Supplies design for automotive charger application to target improved performances compared to the market state-of-the-art. Specifically, two high-efficiency prototypes, an AC/DC converter and a DC/DC converter of $7.5kW$, have been realized for this purpose. To further investigate the characteristics of state-of-the-art GaN power devices two measurement set-ups have been designed. In particular, the trapping phenomenon causing the collapse of drain current during ON-state with a consequent degradation of ON-resistance has been analyzed.

Tipologia del documento
Tesi di dottorato
Alemanno, Alessio
Dottorato di ricerca
Settore disciplinare
Settore concorsuale
Parole chiave
Power Electronics, WBG, SiC, GaN, DAB, Dynamic Ron, Battery charger, Battery Emulator, DAB, Bridgless Totem-Pole
Data di discussione
5 Luglio 2023

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