P.J. Costa Branco
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View article: Modelling and impact of HTS tapes soldering on the electromagnetic characteristics of HTS cage rotor induction machines
Modelling and impact of HTS tapes soldering on the electromagnetic characteristics of HTS cage rotor induction machines Open
Integrating high-temperature superconductors (HTSs) into the rotor of induction machines promises significant advancements in the development of high-specific-power AC electric motors. However, solder joints between rotor HTS tapes pose a …
View article: A smart energy management system for surface unmanned vehicles for border surveillance missions
A smart energy management system for surface unmanned vehicles for border surveillance missions Open
This work proposes a methodology to extend the range of marine unmanned surface vehicles (USV) for border surveillance missions. The typical small scale of USVs and their lack of in-board pilots make USVs an important tool for remote appli…
View article: Comparisons Between Quantitative FMECA Methods: A Case Study on Power Transformer Risk Assessments
Comparisons Between Quantitative FMECA Methods: A Case Study on Power Transformer Risk Assessments Open
The efficacy of new FMECA methods can be assessed through qualitative comparisons of the failure mode rankings. This approach is suitable for a few failure modes but can become impractical or lead to misleading results for more extensive p…
View article: Over 100 years of longitudinal connectivity changes from the perspective of a migratory fish species
Over 100 years of longitudinal connectivity changes from the perspective of a migratory fish species Open
Disruptions of the longitudinal river continuum by artificial barriers have been widely recognized to impact aquatic biodiversity. However, while consequential connectivity changes have been researched extensively, the temporal component h…
View article: Over 100 Years of Longitudinal Connectivity Changes from the Perspective of a Migratory Fish Species
Over 100 Years of Longitudinal Connectivity Changes from the Perspective of a Migratory Fish Species Open
View article: Heterojunction Technology vs. Passivated Emitter and Rear Contact Photovoltaic Panels: Evaluating Efficiency and Profitability Under Challenging Summer Conditions in Lisbon Using Extensive Field Data
Heterojunction Technology vs. Passivated Emitter and Rear Contact Photovoltaic Panels: Evaluating Efficiency and Profitability Under Challenging Summer Conditions in Lisbon Using Extensive Field Data Open
Renewable energy is essential for reducing fossil fuel dependence and achieving carbon neutrality by 2050. This study compares the widely used passivated emitter and rear contact (PERC) cells with advanced heterojunction technology (HJT) c…
View article: Driving Profile Optimization for Energy Management in the Formula Student Técnico Prototype
Driving Profile Optimization for Energy Management in the Formula Student Técnico Prototype Open
This study addresses the challenge of optimizing energy management in the electric vehicle industry, specifically focusing on motorsport. It particularly targets optimizing energy management during an endurance event at the Formula Student…
View article: When to Purchase Heterojunction (HJT) or Passivated Emitter and Rear Contact (PERC) Photovoltaic Technology: Insights from Outdoor Testing
When to Purchase Heterojunction (HJT) or Passivated Emitter and Rear Contact (PERC) Photovoltaic Technology: Insights from Outdoor Testing Open
There is no question that photovoltaics are a mainstream technology fundamental to achieving carbon neutrality. In this context, we analyzed and compared the outdoor performance of PERC (Passivated Emitter and Rear Contact) solar modules w…
View article: Driving Profile Optimization for Energy Management in the Formula Student Técnico Prototype
Driving Profile Optimization for Energy Management in the Formula Student Técnico Prototype Open
This study addresses the challenge of optimizing energy management in the electric vehicle industry, specifically focusing on motorsport. It particularly targets optimizing energy management during an endurance event at the Formula Student…
View article: Identifying Critical Failures in PV Systems Based on PV Inverters’ Monitoring Unit: A Techno-Economic Analysis
Identifying Critical Failures in PV Systems Based on PV Inverters’ Monitoring Unit: A Techno-Economic Analysis Open
Recent advancements in power electronics have significantly improved photovoltaic (PV) inverters by equipping them with sophisticated monitoring capabilities. These enhancements provide economic advantages by facilitating swift failure det…
View article: River continuum disruptions in a highly altered system: The perspective of potamodromous fish
River continuum disruptions in a highly altered system: The perspective of potamodromous fish Open
In this study, we explored how barriers such as dams have affected the longitudinal connectivity of riverine habitats from the perspective of potamodromous fish. For this purpose, connectivity changes are investigated in the central part o…
View article: Axial Stiffness Augmentation by Adding Superconductor Bulks or Limiting Permanent Magnet Rings to a Horizontal Axis Zero-Field Cooled High-Tc Radial Passive Superconducting Bearing
Axial Stiffness Augmentation by Adding Superconductor Bulks or Limiting Permanent Magnet Rings to a Horizontal Axis Zero-Field Cooled High-Tc Radial Passive Superconducting Bearing Open
This paper analyzes the viability of different solutions to passively augment the axial stiffness of a horizontal axis radial levitation passive magnetic bearing (PMB) with a previously studied topology. The zero-field cooling (ZFC) of hig…
View article: Axial Stiffness Augmentation by Adding HTS Bulks or Limiting PM Rings to a Horizontal Axis HTS ZFC Radial Passive Bearing
Axial Stiffness Augmentation by Adding HTS Bulks or Limiting PM Rings to a Horizontal Axis HTS ZFC Radial Passive Bearing Open
This paper analyses the viability of different solutions to passively augment the axial stiffness of a horizontal axis radial levitation passive magnetic bearing (PMB) with topology previously studied. The zero-field cooling (ZFC) of high-…
View article: Operational Analysis of an Axial and Solid Double-Pole Configuration in a Permanent Magnet Flux-Switching Generator
Operational Analysis of an Axial and Solid Double-Pole Configuration in a Permanent Magnet Flux-Switching Generator Open
There are two main beneficial characteristics that doubly salient permanent magnet (PM) electrical machines present for aircraft applications: armature windings and PMs excitation sources placed on the stator side (maintenance and thermal …
View article: Energy Efficiency and Stability of Micro-Hydropower PAT-SEIG Systems for DC Off-Grids
Energy Efficiency and Stability of Micro-Hydropower PAT-SEIG Systems for DC Off-Grids Open
Using pumps operating as turbines (PATs) offers the possibility of increasing the sustainability of water and energy systems by recovering the excess energy that would be otherwise lost in pressure-reducing valves or head loss chambers. Re…
View article: Operational Analysis of an Axial and Solid Double-Pole-Tweeted-Rotor Configuration in a PM Flux Switching Generators
Operational Analysis of an Axial and Solid Double-Pole-Tweeted-Rotor Configuration in a PM Flux Switching Generators Open
Two beneficial characteristics of aircraft generators are having armature windings and PM excitation sources placed on the stator side (maintenance and thermal management) and having a clear-cut rotor without permanent magnets or excitatio…
View article: Energy Efficiency and Stability of Micro-Hydropower PAT-SEIG Systems for DC off-grids
Energy Efficiency and Stability of Micro-Hydropower PAT-SEIG Systems for DC off-grids Open
Using pumps operating as turbines (PATs) offers the possibility of increasing the sustainability of water and energy systems by recovering the excess of energy that would be otherwise lost in pressure reducing valves or head loss chambers.…
View article: Energy Transition in Urban Water Infrastructures towards Sustainable Cities
Energy Transition in Urban Water Infrastructures towards Sustainable Cities Open
The world’s water infrastructures suffer from inefficiencies, such as high energy consumption and water losses due to inadequate management practices and feeble pressure regulation, leading to frequent water and energy losses. This strains…
View article: Alternative analytical models for HTS tapes considering their AC hysteretic and resistive losses
Alternative analytical models for HTS tapes considering their AC hysteretic and resistive losses Open
This work proposes two alternative analytical models to evaluate the ac losses of high-temperature superconducting (HTS) tapes during their hysteretic and resistive modes. These models intend to extend the application range of state-of-the…
View article: Economic Impact Analysis of Monitoring Critical Failures in Photovoltaic Systems Based on a Novel Index 'Cost of Detection'
Economic Impact Analysis of Monitoring Critical Failures in Photovoltaic Systems Based on a Novel Index 'Cost of Detection' Open
View article: How to Maximize the Energy Efficiency in Micro-Hydropower Pat-Seig Systems for Dc Off-Grids: A Step-by-Step Methodology
How to Maximize the Energy Efficiency in Micro-Hydropower Pat-Seig Systems for Dc Off-Grids: A Step-by-Step Methodology Open
View article: Finite-element recipes for HTS-coated conductors and HTS tape topologies
Finite-element recipes for HTS-coated conductors and HTS tape topologies Open
Different electromagnetic formulations were proposed and implemented in finite element (FE) software to model high-temperature superconductors-coated conductors (HTS-CCs) and HTS tape topologies. However, their modelling can be notably dem…
View article: Fuzzy-Based Failure Modes, Effects, and Criticality Analysis Applied to Cyber-Power Grids
Fuzzy-Based Failure Modes, Effects, and Criticality Analysis Applied to Cyber-Power Grids Open
Failure modes, effects, and criticality analysis (FMECA) is a qualitative risk analysis method widely used in various industrial and service applications. Despite its popularity, the method suffers from several shortcomings analyzed in the…
View article: Performance of Data Augmentation Methods for Brazilian Portuguese Text Classification
Performance of Data Augmentation Methods for Brazilian Portuguese Text Classification Open
Improving machine learning performance while increasing model generalization has been a constantly pursued goal by AI researchers. Data augmentation techniques are often used towards achieving this target, and most of its evaluation is mad…
View article: Numerical and Experimental Analysis of the ZFC Heat Release from a YBCO Bulk and Validation of YBCO Thermal Parameters
Numerical and Experimental Analysis of the ZFC Heat Release from a YBCO Bulk and Validation of YBCO Thermal Parameters Open
This article presents results from a simple experimental methodology used to determine the amount of heat transferred from an yttrium barium copper oxide (YBCO) bulk to liquid nitrogen (LN2) and LN2 consumption during the process of zero-f…
View article: Fuzzy-Based Failure Modes, Effects and Criticality Analysis Applied to Cyber-Power Grids
Fuzzy-Based Failure Modes, Effects and Criticality Analysis Applied to Cyber-Power Grids Open
In this paper, we introduce the application of Type-I fuzzy inference systems (FIS) as an alternative to improve the prioritization in the FMECA analysis applied in cyber-power grids. Classical FMECA assesses the risk level through the Ris…
View article: How to Maximize the Energy Efficiency in Micro-Hydropower Pat-Seig Systems for Dc Off-Grids: A Step-by-Step Methodology
How to Maximize the Energy Efficiency in Micro-Hydropower Pat-Seig Systems for Dc Off-Grids: A Step-by-Step Methodology Open
View article: Superconducting Electric Power Systems: R&D Advancements
Superconducting Electric Power Systems: R&D Advancements Open
According to the report “Global Energy Perspective” by McKinsey and Co in 2022, the energy transition will continue to gain momentum, with oil demand projected to peak possibly as soon as 2025 [...]
View article: Recent Developments in Electrical Machine Design for the Electrification of Industrial and Transportation Systems
Recent Developments in Electrical Machine Design for the Electrification of Industrial and Transportation Systems Open
The electrification of the industrial and transportation systems has been an important path toward mitigating climate change [...]
View article: Practical recommendations for the design of automatic fault detection algorithms based on experiments with field monitoring data
Practical recommendations for the design of automatic fault detection algorithms based on experiments with field monitoring data Open
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