Performance Evaluation of DC-DC Converters Based on Last-Generation Semiconductors for LED Lighting Systems

• Autor(a) principal: Dinis, João Paulo Marcelino
• Data de Publicação: 2020
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.6/10879
• topic: Conversores Dc-Dc; Dispositivos de Banda-Proibida Larga; Sistemas de Iluminação Led; Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática

Wide bandgap semiconductors (WBGS) are seen as the next evolution in the field of power electronics. This relatively recent semiconductors technology shows great advantages when compared with the traditional technology, based on silicon semiconductors (SiS). WBGS are able to operate at much higher switching frequencies, allow higher gate-source voltage, and tolerate higher temperatures. Altogether, these factors lead to much higher energy conversion efficiency, when compared to equivalent Si-based power conversion systems, and enable the possibility to design and build more compact systems, especially attractive for use in electric and hybrid vehicles, power converters and other high-power applications. Combined with environmental and climate change concerns, the compelling need to design more efficient power conversion systems promoted the research on the use of WBGS in power converters. When paired with high efficiency LED fixtures, WBG-based LED drivers can bring significant savings in terms of power consumption made at homes, large offices, public buildings, streets, and so on. To better assess the advantages of the utilisation of WBGS in power electronic converters, applied to LED lighting systems, this thesis establishes a comparative analysis of the performance of two similar power electronic converters: the first converter resorts to WBGS, while the second converter adopts SiS as the switching devices.