Investigation of electromagnetic interferences issues

Şteţ, Denisa; Czumbil, Levente; Ancas, Liviu

doi:10.1109/atee.2013.6563457

Cited by 12 publications

(3 citation statements)

References 12 publications

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“…The first term of the electric field is due directly to the electromagnetic induction phenomenon, while the second term is due to charge accumulation on the tissue-air boundary (Stet et al, 2013). According to Equation (1), the computation of the electric field due to electromagnetic induction is done by means of the magnetic vector potential, (Esselle et al, 1992;Roth et al, 1994):…”

Section: Main Section Mechanism Of Magnetic Stimulationmentioning

confidence: 99%

Improved coil design for repetitive magnetic stimulation of the spinal cord

Cretu

Micu

2015

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose – The purpose of this paper is to evaluate the response of the spinal cord, the transmembrane potential, during lumbar magnetic stimulation, using a figure of eight coil. Design/methodology/approach – In order to obtain a precise stimulation of the spinal cord and not the nearby nervous fibres, the coil from the electric circuit of the magnetic stimulator is optimized. The new proposed design is based on the turns’ placement inside the coil, the number of turns required to produce activation. Once the coil configuration is established, the paper addresses other issues that need to be solved: reducing power consumption (the low efficiency of power transfer from the coil to the tissue is a major drawback) and reducing coil heating. Findings – The traditional commercial coils, used for magnetic stimulation in some preliminary experiments, had proved their inability to specifically stimulate the target tissue, without activating the surrounding areas and the low efficiency of power transfer from the coil to the nervous tissue. A more realistic modelling of the stimulating coil, based on the distribution of turns inside the coil can lead to directly stimulation of the spinal cord, during lumbar magnetic stimulation. Practical implications – If the electrical circuit of the magnetic stimulator is improved, the direct stimulation of the spinal cord is obtained; so, this technique could facilitate functional motor activities, including standing and stepping in paralyzed people, without requiring implantation of electrodes like in electrical stimulation. Originality/value – The authors underlined that the spinal cord stimulation can be achieved by magnetic stimulation, only if the parameters of the stimulator circuit are optimized. Therefore an original and realistic modelling of the inductive coil was proposed based on number and turns’ distribution within the coil. The coil is designed so that reducing the excessive heating makes it difficult in obtaining a more frequent repetition of stimulus.

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Section: Main Section Mechanism Of Magnetic Stimulationmentioning

confidence: 99%

Improved coil design for repetitive magnetic stimulation of the spinal cord

Cretu

Micu

2015

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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“…The depth inside the trunk, where the column vertebrae was considered to be placed, is D = 20 [mm]. In our computation we are taking into account the electric properties of the tissues [10].…”

Section: Introductionmentioning

confidence: 99%

Magnetic coil design for evaluating the response of the spinal cord during magnetic stimulation

Cretu

Ciupa

2014

2014 International Conference and Exposition on Electrical and Power Engineering (EPE)

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The purpose of this paper is to evaluate the response of the spinal cord and nearby area during lumbar magnetic stimulation. One of the most important issues about magnetic stimulation of nervous tissue is the lack of precision in the stimulated region. Based on the experimental measurements performed in cooperation with the Medical University of Vienna, the figure-of-eight coil configuration was proved to be not so efficient in spinal cord stimulation (its inability to specifically stimulate the target tissue, without activating the surrounding areas). In order to obtain the best results in stimulation, the electric circuit of the magnetic stimulator must be optimized (LRC series circuit). The most important is to establish an adequate design of the inductive coil in accordance with the medical application that is used. So, starting from these considerations, the present work aims to find a suitable design of magnetic coil capable to trigger stimulation of the spinal cord.

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“…The electromagnetic coupling mechanism is the mechanism which the induced voltages are caused by the cut of an induced electromagnetic field of transmission. Resistive coupling is the mechanism which concern about when there has a fault condition on the overhead power system [4,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Gas Pipeline Induced Voltage Associated with Parallel Transmission Line

Chia

Kadir

Izadi

2015

AMM

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The voltage will be induced in the pipeline due to an electromagnetic field effect generated by the parallel transmission tower. This will bring up the negative effect to the pipeline, transmission tower and people get contracts with the pipeline. A study has been carried out to determine the electromagnetic field (EMF) distribution of parallel transmission line and pipeline due to AC currents and lightning faults. Only a few of previous study focus on lightning faults. The lightning faults data for transmission line and pipeline still insufficient nowadays. A mitigation system has been developed to minimize the induced voltage on pipeline due to the electromagnetic field of energized transmission line. ANSYS Maxwell software is used for modeling. The range of induced voltage obtained is within the acceptable level of the IEEE 80-2000 standards.

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Investigation of electromagnetic interferences issues

Cited by 12 publications

References 12 publications

Improved coil design for repetitive magnetic stimulation of the spinal cord

Improved coil design for repetitive magnetic stimulation of the spinal cord

Magnetic coil design for evaluating the response of the spinal cord during magnetic stimulation

Evaluation of Gas Pipeline Induced Voltage Associated with Parallel Transmission Line

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