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About

About

I have received the Licenciatura and PhD degrees in electrical and computer engineering from the Faculty of Engineering of the University of Porto (FEUP), Portugal. I am a researcher at INESC TEC with scientific interests in wireless transceiver architectures, low-power mixed-signal design, CMOS circuits for mobile communication systems, and wireless power transfer.

Interest
Topics
Details

Details

002
Publications

2017

System design for wireless powering of AUVs

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

Publication
OCEANS 2017 - Aberdeen

Abstract

2017

Performance improvement of a buck converter using Kalman filtering

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

Publication
International Journal of Power Electronics

Abstract

2017

A study on load modulation for underwater wireless power transfer

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

Publication
OCEANS 2017 - Aberdeen

Abstract

2016

An Adaptive System for Underwater Wireless Power Transfer

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

Publication
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

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

Publication
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.

Supervised
thesis

2016

Digitally-Modulated Transmitter for Wireless Communications

Author
Rui Filipe de Pinho Gomes

Institution
UP-FEUP

2016

Circuit Optimization for Underwater Power Transfer

Author
Francisco Ricardo Pinto Gonçalves

Institution
UP-FEUP

2016

Process and Temperature Compensation of CMOS Ring Oscillators

Author
Henrique Manuel Dias Cavadas

Institution
UP-FEUP

2016

Digitally-Reconfigurable Transmitter for Emerging Wireless Communications

Author
Rui Filipe de Pinho Gomes

Institution
UA

2016

Subthreshold Circuits for the Internet of Things

Author
Francisco Ricardo Pinto Gonçalves

Institution
UP-FEUP