A5101882430- Physics of Superconductivity and Magnetism
- Superconducting Materials and Applications
- Magnetic properties of thin films
- Magnetic Properties and Applications
- Superconductivity in MgB2 and Alloys
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- HVDC Systems and Fault Protection
- Frequency Control in Power Systems
- Magnetic and transport properties of perovskites and related materials
- Transcranial Magnetic Stimulation Studies
- Quantum and electron transport phenomena
- Electric Motor Design and Analysis
- Thermal Analysis in Power Transmission
- Magneto-Optical Properties and Applications
- Advanced MRI Techniques and Applications
- Lightning and Electromagnetic Phenomena
- Advanced Condensed Matter Physics
- Magnetic Properties of Alloys
- Magnetic Bearings and Levitation Dynamics
- Sensorless Control of Electric Motors
- Migraine and Headache Studies
- Heat transfer and supercritical fluids
- Advanced Surface Polishing Techniques
- Wireless Power Transfer Systems
Institute of Automation
2024-2025
Chinese Academy of Sciences
2000-2025
Lanzhou University
2025
Harvard University Press
2025
Beijing Jiaotong University
2013-2024
Zhejiang Academy of Forestry
2015
Huazhong University of Science and Technology
2002-2008
Tsinghua University
2003-2005
Institute of Plasma Physics
1997-2002
High Magnetic Field Laboratory
1997
Repetitive transcranial magnetic stimulation (rTMS) is widely used to treat various neuropsychiatric disorders and explore the brain, but its considerable power consumption large size limit potential for broader utility, such as applications in free behaviors home community settings. We addressed this challenge through lightweight core coil designs high-power-density, high-voltage pulse driving techniques successfully developed a battery-powered wearable rTMS device. The combined weight of...
Open AccessRenewablesRESEARCH ARTICLES18 Feb 2025Ion-Conducting Self-Healing Interlayer Enabling Ultrastable Li7La3Zr2O12-Lithium Interphase for High Performance Solid Lithium Metal Batteries Guohao Zhao†, Wenwei Liu†, Bin Zhang, Zhiyi Zhao, Wenbin Huang, Yaqi Xu, Jin Fang, Tao Li and Ying Xu Zhao† School of Materials Energy, Lanzhou University, 730000 , Liu† Zhang Zhao Huang Fang *Corresponding authors: E-mail Address: [email protected] Southeast Research Institute Fujian 351100...
We present a theoretical model for the eddy currents induced by cylindrical magnet falling through copper pipe with vertical slits and resulting inductive drag force. This system maintains mathematically convenient geometry of classic intact problem while introducing boundary conditions that result in fascinating current patterns. Previous experiments have demonstrated force is smaller slit than an same radius, suggesting presence reduces but does not eliminate horizontal required to produce...
Abstract In many high-temperature superconducting (HTS) applications, HTS-coated conductors carry a DC current under an external AC magnetic field. such operating conditions, dynamic resistance will occur when the traversing flux across HTS conductors. Consequently, loss within superconductors is composed of component arising from and magnetization due to This one critical issues for as persistent switches, pumps, rotating machines. this work, total in three-tape coated conductor stack were...
The current–voltage curve and transport ac loss of a second-generation HTS tape with ferromagnetic NiW substrate brass stabilizer are measured. It is found that the up to two orders magnitude larger than what expected by power-law E(J) determined increases increasing frequency. Modeling results show overly large contributed in strip enhanced magnetic hysteresis substrate, frequency-dependent occurs layer covering but not itself as assumed previously. associated currents eddy currents, it has...
Bifilar coil structure is promising for reducing ac loss in resistive-type superconducting fault current limiters (FCLs). However, the electric power networks could be contaminated with harmonic components due to nonlinear loads and switch converters. We built a numerical model calculate transport bifilar stack composed of two coated conductors, carrying distorted current, by means H-formulation. compared calculated losses exposed nonsinusoidal third fifth harmonics plotted as function total...
Traction transformer is one of the critical electrical devices in high-speed trains. To increase efficiency up to 99% and reduce weight fire risks, we are currently building a 6.5 MVA superconducting traction transformer. Assuming 15 as realistic cooling penalty, thermal loss from windings cannot exceed 4 kW order meet efficiency. There non-ignorable high frequency harmonics side transformer, so it important investigate effect harmonic current on ac windings. We explored dependency amount...
Due to the critical characteristics and magnetic flux pinning phenomenon of high-temperature superconducting (HTS) material, electromagnetic calculation for HTS motor is more complicated than conventional motors. In this paper, equivalent electrical conductivity permeability are proposed represent phenomenon, respectively. Considering low-speed single-sided linear induction as an example, 2-D mathematical model established its boundary conditions given. The solved using time-step...
AC loss presents a significant challenge for high-temperature superconducting (HTS) rotating machines. To date, the behaviour of total (Qtol) (with current) and magnetization (Qm) (without in single HTS tape under magnetic fields (RF) have been explored. However, research gap remains understanding how these findings translate to more complex windings Further exploration is needed understand structures, such as stacks. In this work, Qtol Qm, stacks RF perpendicular standing wave field are...
REBCO Roebel cables are promising candidates for bifilar coils (or non-inductive coils) in large scale high temperature superconducting resistive type fault current limiters (SFCLs), as they enable current-carrying capability conjunction with low AC loss. Here we report transport loss measurement results two cable stacks (RBS) different vertical spacing between the turns assembled from a straight 4/2 (four 2 mm width strands) cable. We also two-dimensional finite element method simulation...
Perpendicular ac susceptibility of a superconducting long tape defined by magnetic moment and determined inductively flux is calculated using Brandt's technique from power-law dependence electric field on sheet current density. The requirements χ measurements to the experimental setup procedure are discussed based calculation results.
Central solenoid (CS) is one of the most important components China Fusion Engineering Test Reactor (CFETR), which designed by National Integration Design Group. It a time-consuming work such complex CS magnet designed; therefore, it necessary to design central model coil (CSMC) and determine its electromagnetic properties beforehand. In this paper, we present CSMC that suitable for studying properties. The parameters, magnetic field distribution, ac loss were carefully considered future...
The transport ac loss Q of an elliptical thin strip critical current Ic with a power-law relation is accurately computed as function amplitude Im and frequency f. resulting normalized to following the Norris critical-state formula, converted at fc based on scaling law. Having set several values n base, general expression obtained, which can be used easily calculate for any practical purposes.
High-temperature superconducting (HTS) composite conductors with high carry-current abilities become a preferable choice for devices to meet the requirements of power system. In actual operation conditions devices, it is always accompanied by variational current ramp rates, which may cause ac loss in conductors. Therefore, this work carries out research on losses stacked conductor and twisted stacked-tape cable (TSTC) different rates changing their structural parameters. Critical...
The perpendicular ac susceptibility χ = χ' - jχ" of a conducting thin strip width 2a obeying power-law dependence electric field on sheet current density E/E <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</sub> (K/K )|K/K | <sup xmlns:xlink="http://www.w3.org/1999/xlink">n-1</sup> with n ≥ 1 is calculated as function the amplitude H xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> and frequency ω. A scaling law deduced which states that χ/χ...