J.A. Cobos
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View article: Self and Mutual Inductance Behavioral Modeling of Square-Shaped IPT Coils With Air Gap and Ferrite Core Plates
Self and Mutual Inductance Behavioral Modeling of Square-Shaped IPT Coils With Air Gap and Ferrite Core Plates Open
The design and optimization of coils for Inductive Power Transfer (IPT) systems is an iterative process conducted in Finite Element (FE) tools that takes a lot of time and computational resources. In order to overcome such limitations in t…
View article: Analytical Winding Power Loss Calculation in Gapped Magnetic Components
Analytical Winding Power Loss Calculation in Gapped Magnetic Components Open
The analytical calculation of winding loss in gapped magnetic components is complex, and numerical analysis tools, such as finite elements analysis (FEA) tools, are commonly needed to characterize the windings. As FEA tools are used, the r…
View article: Best Papers and Star Service Awards
Best Papers and Star Service Awards Open
The Editorial Board of the IEEE Journal of Emerging and Selected Topics in Power Electronics (JESTPE) owes a depth of gratitude and appreciation to the authors who got their papers published in the 2019 editions. After an intensely competi…
View article: Macroscopic Modeling of Magnetic Microwires for Finite Element Simulations of Inductive Components
Macroscopic Modeling of Magnetic Microwires for Finite Element Simulations of Inductive Components Open
New compound magnetic material based on parallel continuous ferromagnetic microwires (e.g., based on cobalt) embedded in a body made of polymeric material can potentially offer significant mechanical advantages over well-known fragile ferr…
View article: Equivalent Conductor Layer for Fast 3-D Finite Element Simulations of Inductive Power Transfer Coils
Equivalent Conductor Layer for Fast 3-D Finite Element Simulations of Inductive Power Transfer Coils Open
In this paper, a method to replace conductors, in one or multiple layers, by an equivalent layer with homogeneous current distribution is proposed to allow complex 3D Finite Element simulations. This equivalent layer needs a coarser mesh, …
View article: Multimode Modulation With ZVS for a Single-Phase Single-Stage Inverter
Multimode Modulation With ZVS for a Single-Phase Single-Stage Inverter Open
This article presents a modulation with zero-voltage switching (ZVS) for a single-phase, single-stage inverter intended for photovoltaic applications. In single-stage inverters, the dc-ac conversion stage is merged with the active power pu…
View article: ZVS Auxiliary Circuit for a 10 kW Unregulated LLC Full-Bridge Operating at Resonant Frequency for Aircraft Application
ZVS Auxiliary Circuit for a 10 kW Unregulated LLC Full-Bridge Operating at Resonant Frequency for Aircraft Application Open
In modern aircraft designs, following the More Electrical Aircraft (MEA) philosophy, there is a growing need for new high-power converters. In this context, innovative solutions to provide high efficiency and power density are required. Th…
View article: Characterization of Carbapenemase-Producing Klebsiella oxytoca in Spain, 2016–2017
Characterization of Carbapenemase-Producing Klebsiella oxytoca in Spain, 2016–2017 Open
There is little information about carbapenemase-producing (CP) Klebsiella oxytoca , an important nosocomial pathogen. We characterized CP K. oxytoca isolates collected from different Spanish hospitals between January 2016 and October 2017.
View article: Optimized Design for Wireless Coil for Electric Vehicles Based on The Use of Magnetic Nano-articles
Optimized Design for Wireless Coil for Electric Vehicles Based on The Use of Magnetic Nano-articles Open
Wireless Power Transfer has been endorsed as an innovative technology for charging electric vehicles. Since the autonomy of the electric vehicles is a key factor, the optimization of the wireless coil is a fundamental step in the design of…
View article: Equivalent Parameters of Round and Litz Wire Conductors to Obtain an Equivalent Layer to Accelerate Finite Element Simulations of Wireless Power Transfer System
Equivalent Parameters of Round and Litz Wire Conductors to Obtain an Equivalent Layer to Accelerate Finite Element Simulations of Wireless Power Transfer System Open
In Wireless Power Transfer system, the optimization of the electromagnetic coupling is one of the main problems. Since the geometry usually is 3D, closed analytical equations cannot be obtained. Due to the small dimensions of the winding’s…
View article: Finite Element Modelling of Litz Wire Conductors and Compound Magnetic Materials based on Magnetic Nano-particles by means of Equivalent Homogeneous Materials for Wireless Power Transfer System
Finite Element Modelling of Litz Wire Conductors and Compound Magnetic Materials based on Magnetic Nano-particles by means of Equivalent Homogeneous Materials for Wireless Power Transfer System Open
New magnetic composite based on ferromagnetic nano-particles embedded in a polymeric material can potentially offer significant electromagnetic advantages over the polymer used to protect the ferrite in Wireless Power Transfer systems. Sin…
View article: Guest Editorial Special Issue on Power Supply on Chip, 2018
Guest Editorial Special Issue on Power Supply on Chip, 2018 Open
Power supply on chip (PwrSoC) is becoming a broader and broader concept from several perspectives. The power supply is no longer just a box or a building block decoupled from the rest of the system it supplies. Energy needs to be supplied …
View article: Phase boundaries, nucleation rates and speed of crystal growth of the water-to-ice transition under an electric field: a simulation study
Phase boundaries, nucleation rates and speed of crystal growth of the water-to-ice transition under an electric field: a simulation study Open
We investigate with computer simulations the effect of applying an electric field on the water-to-ice transition. We use a combination of state-of-the-art simulation techniques to obtain phase boundaries and crystal growth rates (direct co…
View article: Mode selection strategy for multi-mode power converters to minimize its differential power
Mode selection strategy for multi-mode power converters to minimize its differential power Open
In this paper we propose the mode selection strategy of a multi-mode single-stage single-phase inverter and the associated mode selection scheme for double-line-frequency power pulsation decoupling between the input an the output port for …
View article: Control of a single phase inverter with multiple modulation strategies based on plant inversion
Control of a single phase inverter with multiple modulation strategies based on plant inversion Open
This work proposes a control linearization technique for a single phase 3 level-flying capacitor multi-level (FCML) inverter with multiple modulation strategies along the line period, based on the plant inversion. Multiple modulation strat…
View article: Differential power as a metric to optimize power converters and architectures
Differential power as a metric to optimize power converters and architectures Open
In this paper we review some of the fundamental limits of dc-dc power converters described in 1966 and 1969 and generate an averaged power model that is useful to perform high-level comparison of power converters and architectures. The mod…
View article: Axisymmetric finite element modelling of compound magnetic materials based on magnetic micro-wires by means of equivalent homogeneous material
Axisymmetric finite element modelling of compound magnetic materials based on magnetic micro-wires by means of equivalent homogeneous material Open
Compound magnetic materials based on parallel continuous ferromagnetic micro-wires embedded in a body made of polymeric material can potentially offer significant mechanical advantages over well-known fragile ferrite in some applications w…