Showing 1-25 of 16,783 resultsfor "Index Terms":Axial Field
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Design Method of Primary Transmitting Coil for Realizing Large Uniform Magnetic Field Distribution
Shu-shu Li;Ping-juan Niu;Li-yuan Yu;Run Mao;Hao Shi;Zheng Cheng
2018 3rd International Conference on Mechanical, Control and Computer Engineering (ICMCCE)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
In view of the problems existing in the existing wireless charging technology, this paper focused on the anti-offset performance of the charging area and system. Based on the principle of electromagnetics, the current density formula which can generate the uniform axial magnetic field strength was calculated, and the current density of the coil surface was combined, A new coil structure and a prim...Show More
Development of Magnetic Field Control System Using HTS Bulks and HTS Coil for MDDS
S. B. Kim;I. Eritate;T. Abe;M. Takahashi;S. Shima;A. Nakashima
Magnetic drug delivery system (MDDS) is a key technology effects in the medical applications, and also the magnetic force control is a very important issue in MDDS. In general, the high magnetic field along the axial direction and high magnetic field gradient along the longitudinal direction are very useful for MDDS. So, we proposed the new magnetic force control system consists of superconducting...Show More
Research on The Axial Magnetic Compensation Method of Ferromagnetic Thin Shell Cylinder
2019 IEEE 3rd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC)
Year: 2019 | Conference Paper |
Ferromagnetic materials will cause abnormal magnetic field in the surrounding space under the action of geomagnetic field. The existing magnetic field anomaly control method mostly uses compensation coil to generate reverse magnetic field. In this paper, ferromagnetic thin shell cylinder is taken as the research object, for the problem of excessive magnetization caused by excessive coil current in...Show More
The sinusoidal air-gap magnetic field design of axial flux permanent magnet synchronous motors
2005 International Conference on Electrical Machines and Systems
Year: 2005 | Conference Paper |
Cited by: Papers (1)
The axial flux permanent magnet synchronous motors have features of short axial length, high energy density and great torque. They have found applications in computer peripherals, electric vehicles in-wheel drive and flywheel energy storage devices. The paper research analytically three methods for forming sinusoidal air-gap magnetic field, and put forward that the method with magnets of uniform m...Show More
Spatial and Temporal Variations of a Screening Current Induced Magnetic Field in a Double-Pancake HTS Insert of an LTS/HTS NMR Magnet
Min Cheol Ahn;Tsuyoshi Yagai;Seungyong Hahn;Ryuya Ando;Juan Bascunan;Yukikazu Iwasa
This paper presents experimental and simulation results of a screening current induced magnetic field (SCF) in a high temperature superconductor (HTS) insert that constitutes a low-/high-temperature superconductor (LTS/HTS) NMR magnet. In this experiment, the HTS insert, a stack of 50 double-pancake coils, each wound with Bi2223 tape, was operated at 77 K. A screening current was induced in the HT...Show More
IEEE Standard for Waveguide and Waveguide Component Measurements
IEEE No. 148, April 1959
Year: 1960 | Standard |
This standard is concerned with measurements of the quantities which characterize a waveguide or waveguide component and the associated electromagnetic fields. The term "waveguide" as used here, is a generic term which includes transmission lines and uniconductor waveguides as special cased. The measurement are described in general terms. For the specif details of procedure and equipment, the read...Show More
Simulation of Process of Reproducing the Measuring Signal of a Magnetostrictive Displacement Transducer on Ultrasonic Torsion Waves for a Triangular Excitation Pulse
2020 International Russian Automation Conference (RusAutoCon)
Year: 2020 | Conference Paper |
In the works known to the authors, a rectangular current pulse is most often used to model the process forming a measuring signal. As from the point of view of the authors it is possible to use other waveforms, so the article examines the influence on the measuring signal magnetostrictive transducer displacements in ultrasonic waves torsion pulse triangular shape. Research carried out by the work ...Show More
MAGY: a time-dependent code for simulation of slow and fast microwave sources
We present the newly developed Maryland Gyrotron (MAGY) code for modeling of slow and fast microwave sources. The code includes a time-dependent description of the electromagnetic fields and a self-consistent analysis of the electrons. The calculations of the electromagnetic fields are based on the waveguide modal representation, which allows the solution of a relatively small number of coupled on...Show More
Simulation of Magnetic Field Distributions in Novel Coil-Type Axial/Cup-Shaped Transversal Magnetic Field Contacts of Vacuum Circuit Breaker
2018 28th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
The contact structure of the arc extinguishing system with high voltage DC vacuum circuit breaker (HVDC-VCB) as the research object, a novel vacuum interrupter coil-type axial/cup-shaped transversal contact structure is designed. Based on the coil-type axial contact structure and the cup-shaped transversal contact structure, the coil-type axial/cup-shaped transversal contact model is established. ...Show More
Effect of Axially Symmetric Magnetic Fields for Dynamics of Low-Current DC Vacuum Arc Plasma
Koichi Tsuruta;Kengo Yanagi;Satoru Shibata;Takeshi Yanagidaira;Takashi Ikehata
In this paper, effects of four types of axially symmetric magnetic fields on the dynamics of low-current dc vacuum arc plasma, which is less than 30 A, were examined. Arcs were ignited by the opening of the butt contacts made of zinc. In the axial magnetic field, the arc plasma was restricted within a column, and the arc voltage rose with increasing gap length. When a magnet was arranged behind th...Show More
Field Computation for an Axial Flux Permanent-Magnet Synchronous Generator
An analytical method to determine the no-load and armature reaction magnetic fields of a single-sided, axial flux permanent-magnet synchronous generator without armature core is presented. Laplace's equation is solved in the rectangular coordinate system to give the scalar magnetic potentials, using a Fourier series method. For computation of the armature reaction field, a multi-current-sheet mode...Show More
Influence of contact distance on the appearance of vacuum arcs with different AMF contacts
Measurements with vacuum interrupters equipped with bipolar axial magnetic field (AMF) contacts have shown that the post-arc current magnitude and its duration fall with shortened arcing time, and decreasing gap distance, respectively. Simulations of post-arc currents point out that this dependency may result either from different arc diameters or different ion densities around current zero. To cl...Show More
Three-Dimensional Time-Dependent Model and Simulation of High-Current Vacuum Arc in Commercial Axial Magnetic Fields Vacuum Interrupters
Lijun Wang;Zhonghao Qian;Xiaolong Huang;Shenli Jia;Zongqian Shi
With a quasi-steady 3-D MHD model, time-dependent axial magnetic field vacuum arcs (AMFVAs) characteristics in commercial vacuum interrupters for half-wave interruption of power-frequency (50 Hz) current are simulated. In a current time-dependent simulation, the influence of AMF lagged from arc current is considered in the arc model. 3-D spatial distributions of many important plasma parameters an...Show More
Research on Axial Magnetic Field Sensitivity in the Polarization-Maintaining Optical Fiber Coil of Fiber Optic Gyroscope
Ningfang Song;Fu Ma;Xiaxiao Wang;Wanqing Chen;Jia Yu;Xiao Peng
The magnetic field sensitivity is the main source of errors in a fiber optic gyroscope (FOG) and the polarization-maintaining (PM) optical fiber coil is a major sensitive source. In this paper, a theory that an orthogonal magnetic field vertical to the light propagating direction in a PM optical fiber coil can induce a non-Faraday nonreciprocal phase difference in a FOG is presented. The theoretic...Show More
Design and Optimization of Helmholtz Coils For Magnetic Fields
2023 5th International Youth Conference on Radio Electronics, Electrical and Power Engineering (REEPE)
Year: 2023 | Conference Paper |
Cited by: Papers (5)
The objective of this work is to investigate the axial magnetic fields and radial magnetic fields of Helmholtz coils under copper chromium electrodes by using a pulse current generator. The vacuum circuit breaker electrode is the heart of its longevity. Based on the simulation results, COMSOL software was used to model the Helmholtz coils. It observed that the coils generate strong magnetic fields...Show More
Accuracy Improvement of Magnetic Field Measurement in WPT Systems
2024 International Symposium on Antennas and Propagation (ISAP)
Year: 2024 | Conference Paper |
In this paper, we present an electromagnetic field visualization system that integrates magnetic field measurement with augmented reality (AR) technology. A key aspect of this system is accurately converting the voltage measured by a shielded loop probe into magnetic field strength using a conversion coefficient derived from Faraday's law. Traditionally, this conversion requires frequent calibrati...Show More
Optimization Method Based on Zonal Harmonics for Axially Symmetric Magnets
An optimization method based on the zonal harmonic description of the magnetic field, suitable for the design of axially symmetric magnetic sources, is presented. Expressions of both axial $B_{z}$ and radial $B_{\rho }$ components of the magnetic field are obtained as the infinite sum of the zonal harmonics. For arrangements having as the basic building block an axially magnetized cylinder, an...Show More
Research on Axial Magnetic Field Characteristics of a Novel Magnetic Field Enhanced Slotted Horseshoe Contact
Jiding Xia;Zihan Wang;Lei Huang;Peicheng Huang;Hui Ma;Jianhua Wang;Yingsan Geng;Zhiyuan Liu
2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
In this paper, a novel slotted contact plate structure for horseshoe contact was proposed, which could strengthen the bipolar axial magnetic field (AMF) of the contact significantly. The objective of this paper is to determine the AMF characteristics of the novel horseshoe contact. The contact diameter was 120 mm. The contact material was CuCr50 (50% Cr). The contact gap ranged from 10 to 50 mm. T...Show More
Design and Optimization of Superconducting Magnet System for 42.0-GHz Gyrotron
In the framework of the Department of Science and Technology (DST), Government of India, a 42.2-GHz 200-kW continuous-wave/long-pulse gyrotron is envisaged to be indigenously developed. This gyrotron shall employ superconducting magnets at the interaction region and warm coils for the gun and collector region. The Institute for Plasma Research is responsible for the overall design and fabrication ...Show More
Magnetic Field Analysis of Magnetic Fluid Suspension Axial Blood Pump and its Effect on Red Blood Cells
2019 IEEE 8th Joint International Information Technology and Artificial Intelligence Conference (ITAIC)
Year: 2019 | Conference Paper |
Cited by: Papers (1)
At present, the analysis of internal physical factors of blood pumping blood and the evaluation method of hemolysis performance of blood pump mainly consider the shear stress of red blood cells and the exposure time under shear force. However, the internal magnetic field strength of the blood pump is also one of the factors influencing the hemolysis performance of the blood pump. In this paper, th...Show More
Analytical Calculation and Low-Order Component Optimization of Axial Electromagnetic Force for an Axial Flux Motor
IEEE Transactions on Magnetics
Cited by: Papers (2)
The low-order high-amplitude component of the axial electromagnetic force is the leading cause of electromagnetic vibration and noise of axial flux permanent magnet (AFPM) motors. In this article, based on the analytical calculation of the axial electromagnetic force for a 20-pole 24-slot AFPM motor, the low-order axial electromagnetic force component is weakened by optimizing the motor’s electrom...Show More
Design and Investigation of Axial Flux Permanent Magnet Synchronous Machine for electric vehicles
2018 International Conference on Communications and Electrical Engineering (ICCEE)
Year: 2018 | Conference Paper |
Vehicle emissions explosively increase in the number of vehicles. Therefore, it is essential to find a solution to reduce (or eliminate) pollution of the environment. When public transport (trains, buses and trams) offer ecological (electric) solutions for private transport, the electrification of vehicles is one of the solutions proposed by car manufacturers. Studies show that most of the polluti...Show More
Coreless Dual Rotor Axial Flux Permanent Magnet Generator For Portable Applications
Charisma Clarke;Edwar Romero-Ramirez;Elisabeth Kames;Seyed Soltani
2022 21st International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)
Year: 2022 | Conference Paper |
Cited by: Papers (2)
This paper reports on the effects of a dual rotor configuration in an axial flux permanent magnet (AFPM) generator that uses thin copper-clad laminate as the coils for high power density packing. The investigation also examines how the strength of the magnetic field is affected by varying the air gap. The dual rotor generator presented in this work produced 116.5 mW for a coil design (two layers) ...Show More
Strain Gauge Method for Evaluating a Three-Dimensional Residual Strain State in ${\rm Nb}_{3}{\rm Sn}$ Wires
Abstract-Concerning the strain effect of superconducting properties for Nb3Sn wires, it is necessary to investigate a three-dimensional strain state that Nb3Sn superconductors truly experience in the composite wire. However, it is very difficult for Nb3Sn wires to obtain the three-dimensional residual strain components experimentally. We adopted the strain gauge that is directly glued onto the 1 m...Show More
Effect of Wire Diameter and Addition of an Axial Magnetic Field on the Dynamics of Radial Wire Array $Z$-Pinches
Francisco Suzuki-Vidal;Sergey V. Lebedev;Simon N. Bland;Gareth N. Hall;Adam J. Harvey-Thompson;Jeremy P. Chittenden;Alberto Marocchino;Simon C. Bott;James B. A. Palmer;Andrea Ciardi
The operation of radial wire array Z-pinches driven by a 1-MA 250-ns current pulse was studied. Variation in the cathode diameter and wire diameter does not affect the overall plasma dynamics but controls the time of wire breakage and the time of pinch formation. The measured times of full wire ablation at the cathode were used to determine the ablation velocity (V abl), and the results give a sca...Show More
Standards Dictionary Terms
- $B$
- $C$
- $C_{\mathrm{d}}$
- $N_{\mathrm{A}}-N_{\mathrm{D}}^{3}$ 3 3 The sign of the quantity indicates the type of carrier (n or p). Where only the magnitude is required, the expression will appear as $\vert N_{\mathrm{A}}-N_{\mathrm{D}}\vert$ .
- $N_{\mathrm{T}}$
- $R$
- $R_{\mathrm{H}}$
- $T$
- $V$
- $V_{\mathrm{p}}$
- $V_{\mathrm{r}}$
- $W_{\mathrm{p}}$
- $\Delta$
- $\Omega$
- $\exp(z)$
- $\mathrm{e}_{\mathrm{r}}$
- $\mu$
- $\mu_{\mathrm{H}}$
- $\mu_{\mathrm{n}}$
- $\mu_{\mathrm{p}}$
- $\omega$
- $\rho$
- $\tau$
- $e$
- $f$
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