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The Pulsed Power Conference is held on a biannual basis and serves as the principal forum forthe exchange of information on pulsed power technology and engineering.
Energy conversion and conditioning technologies, power electronics, adjustable speed drives and their applications, power electronics for smarter grid, energy efficiency,technologies for sustainable energy systems, converters and power supplies
The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted papers will be peer reviewed. Accepted high quality papers will be presented in oral and postersessions, will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE
LASCAS aims at presenting a high-quality forum for researchers, designers, developers and graduate students to present the advances of their work on circuits and systems, amidst an international audience with experts from academia and industry all over the world. The LASCAS 2020 symposium will cover novel technical developments in all the areas of the Circuits and Systems Society, but focusing in the areas of biomedical and implantable devices and applications, low power integrated circuits, high speed communication interfaces and circuits and systems design for renewable energy applications.
IEEE International Conference on Plasma Science (ICOPS) is an annual conference coordinated by the Plasma Science and Application Committee (PSAC) of the IEEE Nuclear & Plasma Sciences Society.
Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission
The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...
Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.
Specific topics of interest include, but are not limited to, sequence analysis, comparison and alignment methods; motif, gene and signal recognition; molecular evolution; phylogenetics and phylogenomics; determination or prediction of the structure of RNA and Protein in two and three dimensions; DNA twisting and folding; gene expression and gene regulatory networks; deduction of metabolic pathways; micro-array design and analysis; proteomics; ...
The design and manufacture of consumer electronics products, components, and related activities, particularly those used for entertainment, leisure, and educational purposes
2017 IEEE Wireless Power Transfer Conference (WPTC), 2017
This paper presents the analysis and design of two decoupled, concentric and coplanar PCB coils. Decoupled coils could be used as two independent receivers sensing the same field and not interfering with each other. In order to nullify the mutual inductance, one of the coils is split into two segments and the segments are wound in different directions, while the ...
2018 9th International Conference on Computing, Communication and Networking Technologies (ICCCNT), 2018
MRI system helps diagnose the diseases of humans, which has output in the form of images. MRI system provides images of the diseases of human beings occurring inside the body. To give good quality of images RF coils are used in MRI. RF coils transmits signals towards the patient's body and receives the signal which are reflected back. RF surface ...
2011 International Conference on Applied Superconductivity and Electromagnetic Devices, 2011
Recently the Bessel function approach to calculating the magnetic fields of coils has been used to calculate the mutual inductance and the force between two non coaxial thick cylindrical coils with parallel axes and uniform radial current distributions. This method can also be applied to calculate the force and inductance between an ordinary coil and a Bitter coil, or between ...
IEEE Transactions on Magnetics, 2008
This paper presents a novel steady-state and transient performance analysis of the universal motors with appropriate turns ratio of lead coils to lag coils in an armature. Time-stepping finite-element analysis has been used to successfully predict the brush-to-bar voltage drop of the universal motor. The computed armature current and speed have been validated by tests in a 500-W universal motor. ...
IEEE Transactions on Applied Superconductivity, 2015
Using a high-temperature superconducting (HTS) coil as the transmitting coil is an optional way to increase the efficiency and the distance of a wireless power transfer (WPT) system. In practical cases, receiving coils might be not only one, or not convenient to get a low-temperature environment, or not in the same sizes with the transmitting coil. Thus, we constructed a ...
This paper presents the analysis and design of two decoupled, concentric and coplanar PCB coils. Decoupled coils could be used as two independent receivers sensing the same field and not interfering with each other. In order to nullify the mutual inductance, one of the coils is split into two segments and the segments are wound in different directions, while the second coil is inserted in between those two segments. Since wireless power transfer systems operate at high frequencies, the coil efficiency suffers mainly due to the losses caused by skin and proximity effects. Optimizing a coil to reduce the AC conduction losses and increase the inductance can help improve system efficiency. One of the methods presented in the paper involves splitting the coil turns into multiple parallel traces to reduce the losses due to proximity or current crowding effect. The design methodology includes the optimization of coils to achieve a high quality factor and find an arrangement where two circular spiral coils are coaxial, coplanar and decoupled at the same time. The proposed method is verified through simulations and experiments on a selected PCB design.
MRI system helps diagnose the diseases of humans, which has output in the form of images. MRI system provides images of the diseases of human beings occurring inside the body. To give good quality of images RF coils are used in MRI. RF coils transmits signals towards the patient's body and receives the signal which are reflected back. RF surface coils are used in MRI for receiving the signals over the field of interest. There are various types of structures for surface coils. In this paper design of rectangle, square and hexagon coils for 1.5T MRI systems are shown. The simulation results of the coils are compared with each other.
Recently the Bessel function approach to calculating the magnetic fields of coils has been used to calculate the mutual inductance and the force between two non coaxial thick cylindrical coils with parallel axes and uniform radial current distributions. This method can also be applied to calculate the force and inductance between an ordinary coil and a Bitter coil, or between two bitter coils, not necessarily coaxial. Bitter coils give a simpler case of the method, and it is possible to solve analytically for the magnetic field of a bitter disk.
This paper presents a novel steady-state and transient performance analysis of the universal motors with appropriate turns ratio of lead coils to lag coils in an armature. Time-stepping finite-element analysis has been used to successfully predict the brush-to-bar voltage drop of the universal motor. The computed armature current and speed have been validated by tests in a 500-W universal motor. The turns ratio of lead coils to lag coils minimizing the brush-to-bar voltage drop has been determined from the simulation results.
Using a high-temperature superconducting (HTS) coil as the transmitting coil is an optional way to increase the efficiency and the distance of a wireless power transfer (WPT) system. In practical cases, receiving coils might be not only one, or not convenient to get a low-temperature environment, or not in the same sizes with the transmitting coil. Thus, we constructed a WPT system from one HTS coil to two copper coils, and one of the copper receiving coils had a different size from the HTS transmitting coil. In addition, we placed one HTS relaying coil between the transmitting coil and the receiving coils to increase the efficiency and the distance. Based on this system, we conducted several experiments and analyzed the results. We found that a denser coil could obtain more power in an HTS WPT system and that WPT from one HTS coil to two copper coils was more efficient than WPT from the same HTS coil to one of the two copper coils. We also demonstrated that an appropriate layout of the HTS relaying coil can increase the HTS WPT efficiency.
In the context of the ITER project, the winding geometry of the large-scale magnetic field coils has to be validated. A geometrical survey during manufacturing is combined with a magnetic survey of finished assemblies. We are developing a fluxmeter system, which is capable of sampling magnetic flux density values (or gradients thereof) at many locations distributed around the assembly. The measurement method uses low-frequency (300 mHz-1.2 Hz) ac excitation of the coil under study and acquires induced voltage values sensed by magnetic flux pickup coils. The sampling strategy leverages on the use of calibrated arrays of coils mounted on rigid supports. The supports, whose positions in space are measured with a laser tracker, carry 48 distinct coils and are placed at several locations around the perimeter of the magnet under study. Maps of induced voltage values, corresponding to time-varying magnetic flux, are recorded. In this contribution, we present experimental results obtained on the first available European double-pancake prototype (12 turns) for the toroidal field coils and compare the results with feedforward computation using magnetostatics. At 300 mHz, the global relative agreement between measured and computed signal amplitude is in the % range. It is necessary to take into account the knowledge of the actual shape of the 12-turn current filament.
As the sizes of implantable medical devices such as implantable cardioverter defibrillators, deep brain stimulators, and retinal implants shrink; powering these devices become more challenging. Wireless power transfer (WPT) enables the use of rechargeable and thus smaller batteries, however it also requires additional space for the receiving coil. Depending on the location of the implant in the body, device area or volume can be more constrained. In this paper, we investigate multi-layer planar spiral coils via simulations. We study the impact of number of turns on the quality factor for multi-layer coils including coils with different number of turns in each layer (hybrid coils) and we offer recommendations on the approximate number of turns for having high Q values.
Two types of shaking coils are focused on reducing screening currents induced in solenoid coils wound with high-temperature superconducting (HTS) tapes. One is a pair of copper shaking coils coaxially located inside and outside the HTS coil to apply an ac magnetic field in the axial direction. The other is an HTS shaking coil with notch located only outside the HTS coil to minimize the radial components of local ac fields applied to windings of the HTS coil as small as possible. It is found that the copper shaking coils yield the allowable amount of power dissipation in liquid helium. The effectiveness of the HTS shaking coil to reduce screening-current-induced fields generated by another magnetized HTS coil is also experimentally validated in liquid nitrogen using a commercially available coated conductor with narrow width.
Many alternating-current rotating electric machines are designed to have multiturn form-wound stator coils. In these cases, the winding has two separate but interrelated insulating barriers: one (turn insulation) between the various turns and the second (ground insulation) between the turns and ground. Failure of either of these barriers will prematurely terminate the service life of the machine. A test level, twice rated voltage plus 1 kV, for the ground insulation has been in existence for many years. This guide suggests methods and test levels for the turn insulation.
The poloidal field (PF) coils and correction coils (CCs) constitute one of the four hydraulic loops of the ITER magnet system. They are cooled in parallel by the same heat exchanger. The PF coils consist of 6 different pulsed coils while the CCs include 18 coils divided into 3 different sets: bottom, side and top. The PF coils are made of dual-channel NbTi conductors whereas the CCs consist of single-channel NbTi conductors. The SuperMagnet suite of codes can combine 1-D cooling with supercritical helium flow in the ITER conductors and the 2-D heat diffusion across the coils into a full-scale quasi 3-D model. We analyzed the in-coil NbTi conductor performance and the heat load to the cryogenic plant. We also compared the results from Vincenta and SuperMagnet.
This guide outlines the techniques and application considerations for determining the location of a fault on ac transmission and distribution lines. This document reviews traditional approaches and the primary measurement techniques used in modern devices: one-terminal and two-terminal impedance-based methods and traveling wave methods. Application considerations include: two- and three-terminal lines, series-compensated lines, parallel lines, untransposed lines, underground cables, fault ...
This guide includes guidelines for the following: insulating oil maintenance and diagnostics, oil reclamation, testing methods for the determination of remaining insulation (paper) life, and upgrades of auxiliary equipment such as bushings, gauges, deenergized tap changers (DETCs), load tap changers (LTCs) (where applicable), and coil reclamping. The goal of this guide is to assist the user in extending the useful ...
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