Daniele Desideri, Alvise Maschio and Paolo Mattavelli
The purpose of this paper is to investigate the exposure of human workers to low and high frequency electromagnetic fields during operation of GMAW‐P welding machines.
Abstract
Purpose
The purpose of this paper is to investigate the exposure of human workers to low and high frequency electromagnetic fields during operation of GMAW‐P welding machines.
Design/methodology/approach
First, a numerical parametric analysis of the current waveform has been performed in Matlab, with reference to the human exposure; then a simulation model of a full welding system has been implemented in Simulink/Matlab. The effect has been numerically quantified accordingly to European Standards EN 50444 and EN 50445.
Findings
Contributions to human exposure of specific parts of the current waveform have been evaluated. A new numerical implementation of a full welding system has been done.
Practical implications
The paper shows that there could possibly be improvement in the design of current waveforms, with respect to a reduced human exposure of workers to electromagnetic fields.
Originality/value
The paper presents a new numerical tool that can be useful since the design phase of a welding system for the evaluation of human exposure of workers to electromagnetic fields.
Details
Keywords
Daniele Desideri, Alvise Maschio, Dan Doru Micu and Olivia Ramona Miron
The aim of the work was to obtain an auxiliary instrument able to give the magnetic configuration of a magnetron sputtering device for operation with targets, magnetic and non…
Abstract
Purpose
The aim of the work was to obtain an auxiliary instrument able to give the magnetic configuration of a magnetron sputtering device for operation with targets, magnetic and non magnetic, with different heights, starting from a device with no detailed information of the source.
Design/methodology/approach
An inverse problem has been dealt with. A 2D numerical analysis has been performed, which utilizes as a starting point a model identified with a simple analytical procedure based on measurements.
Findings
A satisfactory equivalent model has been identified, and validated in several different conditions.
Originality/value
The proposed approach can be applied when no detailed information of the source is available, in the case of a cathode without a ferromagnetic yoke.
Details
Keywords
Daniele Desideri, Alvise Maschio, Marco Bolzan, Marco Natali and Monica Spolaore
The purpose of this paper is to obtain a multidisciplinary characterization of nanostructured copper films for electromagnetic shields.
Abstract
Purpose
The purpose of this paper is to obtain a multidisciplinary characterization of nanostructured copper films for electromagnetic shields.
Design/methodology/approach
Structural and electrical analysis have been applied, on copper nanometric films produced by a magnetron sputtering device.
Findings
Data are provided for copper films realized by magnetron sputtering deposition on glass, in different operating conditions.
Practical implications
A multidisciplinary comprehension of shielding effectiveness of nanostructured thin films can be important in many applications where there are electromagnetic compatibility problems.
Originality/value
The paper gives a valuable set of information for the characterization of nanometric copper thin films.