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1 – 4 of 4Alejandro Naval, Hector Sarnago, Ignacio Lope, Oscar Lucia and José M. Burdio
Litz wire manufacturing using mechanical procedures presents several limitations regarding reliability and repeatability, especially when a small strand diameter is used. This…
Abstract
Purpose
Litz wire manufacturing using mechanical procedures presents several limitations regarding reliability and repeatability, especially when a small strand diameter is used. This paper aims to propose a power supply design for Litz wire manufacturing using a high-frequency high-performance resonant converter.
Design/methodology/approach
This paper proposes the design of a resonant power supply for induction heating specially designed to tackle with the challenge of heating Litz wires quickly.
Findings
The proposed converter enables the removal of the isolating coating from the Litz wire through induction heating, improving significantly the manufacturing process.
Originality/value
The proposed converter improves significantly the manufacturing process of Litz wire through induction heating, with economic and reliability benefits.
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Keywords
Borja López-Alonso, Pablo Briz, Hector Sarnago, José M. Burdio and Oscar Lucia
This paper aims to study the feasibility of proposed method to focus the electroporation ablation by mean of multi-output multi-electrode system.
Abstract
Purpose
This paper aims to study the feasibility of proposed method to focus the electroporation ablation by mean of multi-output multi-electrode system.
Design/methodology/approach
The proposed method has been developed based on a previously designed electroporation system, which has the capabilities to modify the electric field distribution in real time, and to estimate the impedance distribution. Taking into consideration the features of the system and biological tissues, the problem has been addressed in three phases: modeling, control system design and simulation testing. In the first phase, a finite element analysis model has been proposed to reproduce the electric field distribution within the hepatic tissue, based on the characteristics of the electroporation system. Then, a control strategy has been proposed with the goal of ensuring complete ablation while minimizing the affected volume of healthy tissue. Finally, to check the feasibility of the proposal, several representative cases have been simulated, and the results have been compared with those obtained by a traditional system.
Findings
The proposed method achieves the proposed goal, as part of a complex electroporation system designed to improve the targeting, effectiveness and control of electroporation treatments and serve to demonstrate the feasibility of developing new electroporation systems capable of adapting to changes in the preplanning of the treatment in real-time.
Originality/value
The work presents a thorough study of control method to multi-output multi-electrode electroporation system by mean of a rigorous numerical simulation.
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Keywords
Oscar Lucia, Hector Sarnago and José M. Burdio
Wide-bandgap (WBG) semiconductors have emerged as a disruptive technology in the power electronics sphere. This paper aims to analyse and discuss the importance for induction…
Abstract
Purpose
Wide-bandgap (WBG) semiconductors have emerged as a disruptive technology in the power electronics sphere. This paper aims to analyse and discuss the importance for induction heating systems and gives some examples and highlights some future design trends and perspectives.
Design/methodology/approach
The benefits of WBG semiconductors are reviewed with a special emphasis on induction heating applications.
Findings
WBG devices enable the design of higher-performance induction heating power supplies. A significant selection of the reported converters is discussed, highlighting the benefits of this technology.
Originality/value
This paper highlights the benefits of WBG semiconductors and their potential to change and improve induction heating technology in the next years.
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Claudio Carretero, Óscar Lucía, Jesús Acero, Rafael Alonso and José M. Burdío
The aim of this paper is to propose a design procedure based on the impedance boundary condition in order to simplify the design of inductors for domestic induction heating…
Abstract
Purpose
The aim of this paper is to propose a design procedure based on the impedance boundary condition in order to simplify the design of inductors for domestic induction heating systems.
Design/methodology/approach
An electromagnetic description of the inductor system is performed to substitute the effects of a component, named system load, for a mathematical condition, the so‐called impedance boundary condition. This is suitable to be used in electromagnetic systems involving high conductive materials at medium frequencies, as it occurs in an induction heating system. Applying this approach, a simplified electrical model arises from the general system.
Findings
A considerable reduction in the efforts devoted to design a coil for induction heating purposes is achieved, because the solution considering the variation of three physical parameters are projected to a one‐dimensional space only depending on a single parameter named corrected penetration depth. This proposal assesses the working conditions of standard induction systems.
Practical implications
This work is performed to achieve a better understanding of the fundamentals involved in the electromagnetic modeling of an induction heating system. The main goal is the definition of a better coil design process because it is probably the most time‐consuming task in the construction of a complete induction system.
Originality/value
In this paper, the so‐called corrected penetration depth is defined. This single parameter allows explaining the influence of the physical parameter of the inductor load and the excitation frequency in the equivalent of the complete inductor system. The numerical results carried out considering the corrected penetration depth instead of the physical load properties have been validated experimentally.
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