Prácticas de electrónica Por Paul B. Zbar, Albert Paul Malvino, Michael A. Mille

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Microinversor Monofásico para Sistema Solar Fotovoltaico Conectado á Rede Elétrica-Jonas Rafael Gazoli-Universidade Estadual de Campinas Faculdade de Engenharia Elétrica e de Computação-BRASIL

Microinversor Monofásico para Sistema Solar Fotovoltaico Conectado á Rede Elétrica 
Jonas Rafael Gazoli Campinas, SP Agosto/2011
Universidade Estadual de Campinas 
Faculdade de Engenharia Elétrica e de Computação 
Departamento de Sistemas e Controle de Energia
 Dissertação de Mestrado apresentada na Faculdade de Engenharia Elétrica e de Computação como parte dos requisitos para obtenção do título de Mestre em Engenharia Elétrica.
 Área de concentração: Energia Elétrica. Orientador: Prof. Dr. Ernesto Ruppert Filho Co-orientador: Prof. Dr. Marcelo Gradella Villalva 

 RESUMO Este trabalho apresenta uma contribuição `a pesquisa e ao desenvolvimento de microinversores monofásicos para sistemas fotovoltaicos de energia solar conectados á rede elétrica de baixa tens˜ao. O objetivo principal da pesquisa e apresentar o projeto, a construção e os resultados experimentais de um microinversor eletrônico que processa a energia proveniente de um painel fotovoltaico e faz a conexão deste dispositivo com a rede elétrica. São apresentados estudos teóricos e simulações sobre painéis fotovoltaicos, sobre a modelagem e o controle de conversores eletrônicos e sobre o algoritmo de rastreamento do ponto de máxima potência. São apresentados resultados experimentais obtidos com um microinversor experimental desenvolvido em laboratório, constituído de dois estágios de conversão (CC-CC e CC-CA). Palavras-chave: Geração distribuída de energia elétrica, energia solar fotovoltaica, eletrônica de potencia, inversores elétricos

 ABSTRACT This thesis presents a contribution to research and development of single-phase micro-inverters for low voltage grid-connected photovoltaic systems. The main goal of this research is to present the project, the development and experimental results of an electronic micro-inverter that processes the energy from a photovoltaic panel and connects this device to the main grid. Theoretical studies and simulations on photovoltaic panels are shown, as the modeling and control of the electronic converters and the maximum power point tracking algorithm. Results with an experimental microinverter consisting of two stages (DC-DC and DC-AC) are also shown. Keywords: Distributed generation of electricity, photovoltaic solar energy, power electronics, electrical inverters

LINK :http://repositorio.unicamp.br/bitstream/REPOSIP/259012/1/Gazoli_JonasRafael_M.pdf

Switch Mode Power Supply Current Sensing-By Henry Zhang, Mike Shriver, and Kevin B. Scott; Analog Devices, Bodo´s Power Systems® January 2019

Switch Mode Power Supply Current Sensing 
Current-mode control is widely used for switching mode power supplies due to its high reliability, simple loop compensation design, and simple and reliable load sharing capability. The current sense signal is an essential part of a current-mode switch mode power supply design; it is used to regulate the output and also provides overcurrent protection. By Henry Zhang, Mike Shriver, and Kevin B. Scott; Analog Devices, Inc Bodo´s Power Systems® 4 January 2019 
www.bodospower.com

Reduce Size and Increase Efficiency with GaN-based LLC Solutions-By Yajie Qiu, Senior Power Electronics Applications Engineer, GaN Systems Inc.

Reduce Size and Increase Efficiency with GaN-based LLC Solutions GaN High Electron Mobility Transistors (GaN HEMT) have lower driving loss and shorter deadtime circuit benefits due to significantly reduced gate charge (Qg) and output capacitance (Coss) compared to Silicon MOSFETS. Therefore, GaN HEMTs show significant advantages over Silicon MOSFETs in high-frequency soft-switching resonant topologies such as an LLC resonant converter. With increased switching frequency (fsw), the transformer core size can be reduced. Furthermore, a 3-D PCB structure is employed to increase the power density. A 190-Watt, 400V-19V GaN Systems E-HEMT based LLC DC-DC resonant converter is carefully designed, and the transformer is optimized for high-end adapter applications operating above 600kHz. The converter shows a complete design with a power density over 63W/inch3, including the 400V bus capacitor, with a peak efficiency of 96%.

 By Yajie Qiu, Senior Power Electronics Applications Engineer, GaN Systems Inc.

LINK ORIGINAL https://www.bodospower.com/default.aspx

Switch Mode Power Supply Current Sensing-By Henry Zhang, Mike Shriver, and Kevin B. Scott; Analog Devices, Inc

Switch Mode Power Supply Current Sensing Current-mode control is widely used for switching mode power supplies due to its high reliability, simple loop compensation design, and simple and reliable load sharing capability. The current sense signal is an essential part of a current-mode switch mode power supply design; it is used to regulate the output and also provides overcurrent protection. By Henry Zhang, Mike Shriver, and Kevin B. Scott; Analog Devices, Inc

 LINK ORIGINAL:  https://www.bodospower.com/