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Detalhes

Detalhes

006
Publicações

2017

System design for wireless powering of AUVs

Autores
Ressurreicao, T; Goncalves, F; Duarte, C; Goncalves, R; Gomes, R; Santos, R; Esteves, R; Pinto, P; Oliveira, I; Pessoa, LM;

Publicação
OCEANS 2017 - Aberdeen

Abstract

2017

Performance improvement of a buck converter using Kalman filtering

Autores
Gora, W; Duarte, C; Costa, P; Pereira, A;

Publicação
International Journal of Power Electronics

Abstract

2017

A study on load modulation for underwater wireless power transfer

Autores
Duarte, C; Goncalves, F; Ressurreicao, T; Gomes, R; Correia, V; Goncalves, R; Santos, R;

Publicação
OCEANS 2017 - Aberdeen

Abstract

2016

An Adaptive System for Underwater Wireless Power Transfer

Autores
Goncalves, F; Pereira, A; Morais, A; Duarte, C; Gomes, R; Pessoa, LM;

Publicação
2016 8TH INTERNATIONAL CONGRESS ON ULTRA MODERN TELECOMMUNICATIONS AND CONTROL SYSTEMS AND WORKSHOPS (ICUMT)

Abstract
In wireless power transfer systems, if the driver is not capable of dynamically adapt its own switching frequency, small environmental changes or even slight deviations in circuit parameters may prevent the complete system from working properly when the optimal resonance frequency moves towards new values. In this paper, we propose an adaptive system suitable for underwater wireless applications in sea water. The output voltage is regulated using the wireless power link, avoiding the need for additional wireless interfaces. Our complete system includes the power driver, coupling coils, rectifier, and two micro-controllers. The regulation is accomplished by digital load modulation, observable at the input by means of current sensing at the power supply. Experimental results demonstrate a class-D driver with a series-series resonant topology working in saline water, delivering power between 1.6 and 2.4 W. The regulated voltage is 7.5 V with error less than 7.2 % in the load range of 30 to 37 Omega and 6 to 10 V power supply variation. The switching frequency is adjusted within the range of 7 kHz deviation (-7%).

2016

Assessment of design trade-offs for wireless power transfer on seawater

Autores
Santos, HM; Pereira, MR; Pessoa, LM; Duarte, C; Salgado, HM;

Publicação
OCEANS 2016 MTS/IEEE Monterey, OCE 2016

Abstract
In this work we propose a method for maximization of the efficiency of an underwater wireless power transfer system that has to cope with load changes, quality factor and coupling coefficient deviations. By means of 3D electromagnetic simulation and numerical computation, parameter analysis is accomplished using different compensation methods, namely series-series, series-parallel and parallel-parallel. Moreover, a linear load profile is assessed as a proof of concept applicable to more complex load behaviours. For this linear load variation a maximum measured average efficiency of 82% was obtained throughout the entire battery state of charge. Electronics and full system considerations are also presented. Finally, a good agreement between theoretical predictions of the proposed method, simulation assessment and measurement results was verified. © 2016 IEEE.

Teses
supervisionadas

2018

Operação de Sistemas de Distribuição Incluindo Veículos Elétricos e Recursos Energéticos Renováveis

Autor
Pedro Dias Lopes Coimbra

Instituição
UP-FEUP

2016

Digitally-Reconfigurable Transmitter for Emerging Wireless Communications

Autor
Rui Filipe de Pinho Gomes

Instituição
UA

2016

Digitally-Modulated Transmitter for Wireless Communications

Autor
Rui Filipe de Pinho Gomes

Instituição
UP-FEUP

2016

Circuit Optimization for Underwater Power Transfer

Autor
Francisco Ricardo Pinto Gonçalves

Instituição
UP-FEUP