A5033964363- Physics of Superconductivity and Magnetism
- Frequency Control in Power Systems
- Natural Fiber Reinforced Composites
- Superconducting Materials and Applications
- Polymer crystallization and properties
- Polymer Nanocomposites and Properties
- Soft Robotics and Applications
- Microgrid Control and Optimization
- Magnetic and transport properties of perovskites and related materials
- Tribology and Wear Analysis
- Embedded Systems and FPGA Design
- biodegradable polymer synthesis and properties
- GaN-based semiconductor devices and materials
- Underwater Vehicles and Communication Systems
- Robotic Path Planning Algorithms
- Advanced Algorithms and Applications
- Polymer composites and self-healing
- High voltage insulation and dielectric phenomena
- Power Line Inspection Robots
- Electromagnetic Launch and Propulsion Technology
- Lightning and Electromagnetic Phenomena
- Electric Motor Design and Analysis
- Magnetic Field Sensors Techniques
- Epoxy Resin Curing Processes
- HVDC Systems and Fault Protection
Sichuan University
2016-2025
Zhejiang University
2012-2024
Technische Universität Ilmenau
2023
Institute of Semiconductors
2023
Chinese Academy of Sciences
2023
Chengdu University of Information Technology
2011-2020
Fujian Electric Power Survey & Design Institute
2017
Nanjing University of Information Science and Technology
2013-2015
Louisiana State University Agricultural Center
2006-2013
Nanjing University
2013
Abstract Composites based on high density polyethylene (HDPE), pine flour, and organic clay were made by melt compounding then injection molding. The influence of crystallization behavior, mechanical properties, water absorption, thermal stability HDPE/pine composites was investigated. containing exfoliated a two‐step procedure with the aid maleated (MAPE). use 2% decreased temperature ( T c ), rate, crystallinity level composites, but did not change crystalline thickness. When MAPE added,...
Polypropylene (PP)/montmorillonite (MMT) nanocomposites have been prepared by melt intercalation using organomontmorillonite and conventional twin screw extrusion. The dispersibility of silicate layers the montmorillonite in composites was investigated X-ray diffractometer transmission electron microscopy (TEM). are dispersed at nanometer level PP matrix, as revealed TEM results. tensile strength PP/MMT is not much improved compared with pure or filled composites. However, impact greatly...
Power swings may cause power system instability; therefore, hybrid energy storage systems (HESSs) are necessary to smooth the output of wind farms. Superconducting magnetic (SMES) have a high density, whereas battery (BESSs) provide density. The significant contribution this paper is proposal hierarchical control strategies for an HESS composed SMES and BESS. Mathematical models port-controlled Hamiltonian (PCH) established. At device level, novel strategy based on PCH proposed improve its...
We have designed and built a novel high-temperature superconducting (HTS) flux pump device to charge second-generation (2G) HTS double pancake coil (DPC). This generates dc-biased ac travelling wave on sections of 2G coated conductor (superconducting stator), which pumps into the closed loop formed by DPC stator. In this paper, we discuss importance field, wave, direction in process, how control magnetization an with above factors. found that pure can only transport net presence dc-bias...
An experimental platform of high temperature superconducting (HTS) synchronous motor with HTS flux pump has been designed and under construction. The as an exciter eliminates thermal load from the metal current leads, which will reduce cryogenic volume improve efficiency machine. A finite element model (FEM) using T-A formulation was developed to analyze electromagnetic characteristics a double-pancake (DP) racetrack coil. no-insulation (NI) coil wound by YBCO tapes fabricated winding...
To investigate the impact of applied magnetic field wavelength on pumped current, compact linear-motor type high temperature superconducting (HTS) flux pump devices two difference wavelengths were designed and built. These pumps are small in size, which generate DC-biased AC travelling waves, charge DC current into HTS closed-loop contactless manner. In this work, by comparing λ = 34.2 mm 21.0 mm, we had experimentally investigated how affects an insulated YBCO double pancake coil (DPC)....
Abstract The cure kinetics of commercial phenol–formaldehyde (PF), used as oriented strandboard face and core resins, were studied using isothermal dynamic differential scanning calorimetry (DSC). the resin completely followed an n th‐order reaction mechanism. order was nearly 1 with activation energy 79.29 kJ mol −1 . showed a more complicated mechanism, including both autocatalytic reactions. part, 2.38, began at lower temperatures, but rate part increased much faster increase in curing...
This paper presents an electromagnetic design of a 1.5 T REBCO magnet for dedicated orthopedic magnetic resonance imaging (MRI). makes MRI portable as well cheaper. Due to the application no-insulation high temperature superconductor (HTS) technology, composed double-pancake coils (DPC) is highly compact; its outer diameter and axial length are both less than 300 mm, room-temperature bore 200 mm. On other hand, we used multiflux pumps charge DPCs separately reduce tape consumption costs...
The linear-motor type flux pump is a wireless DC power source for high-temperature superconducting coils, which compact in size, efficient energy use, fast output control, etc. It consists of three major parts: windings, phase windings and iron circuit, generates DC-bias AC travelling wave its airgap. In theory, there are controllable parameters such as field, amplitude the wave, field frequency (travelling speed). By changing those parameters, we change applied fields current into coils....
The flux pumps can realize non-contact excitation of high-temperature superconducting (HTS) magnet and eliminate heat leakage caused by current leads. However, earlier proposed pump needs to be installed inside the cryostat, which leads additional load cryogenic system. Here, we report successful demonstration a through-wall linear-motor type pump, with its heating parts such as copper windings completely outside while generated is dissipated in air insulated from cryostat. With an...
Abstract Blends based on recycled high density polyethylene (R‐HDPE) and poly(ethylene terephthalate) (R‐PET) were made through reactive extrusion. The effects of maleated (PE‐ g ‐MA), triblock copolymer styrene ethylene/butylene (SEBS), 4,4′‐methylenedi(phenyl isocyanate) (MDI) blend properties studied. 2% PE‐ ‐MA improved the compatibility R‐HDPE R‐PET in all blends toughened by SEBS. For R‐HDPE/R‐PET (70/30 w/w) SEBS, dispersed PET domain size was significantly reduced with use ‐MA,...
The practical design of GaN-based Schottky barrier diodes (SBDs) incorporating a field plate (FP) structure necessitates an understanding their working mechanism and optimization criteria. In this work, the influences parameters FPs upon breakdown diode are investigated in detail rules FP structures for SBDs presented wide scale material device parameters. By comparing three representative dielectric materials (SiO2, Si3N4 Al2O3) selected fabricating FPs, it is found that product...
High-density polyethylene (HDPE) and natural fiber composites were prepared by melt compounding injection molding. The influence of type (i.e., pine, bagasse, rice straw, husk) the addition coupling agents on composite properties investigated. use 30 wt% enhanced tensile flexural neat HDPE, but decreased impact strength. comprehensive mechanical HDPE/natural significantly improved 2 maleated (MAPE). toughness was further with 5 triblock copolymer styrene-ethylene/butylene-styrene (MASEBS)....
This paper presents a novel nonlinear control strategy for superconducting magnetic energy storage (SMES) system during network unbalance. Grid voltage unbalances tend to substantially degrade the operation of SMES system; conventional methods cannot completely address this issue. In paper, three selectable targets are identified according working principle under an unbalanced condition reduce impacts second harmonics in output power, reactive and grid-side current. Next, port-controlled...
High-temperature superconducting (HTS) flux pump can supply DC current into the magnet coil in a contactless manner. The works similarly as power supply, with low output voltage and high current. In this paper, based on linear-motor type previously introduced from our laboratory (W. Wang et al. 2018), we miniaturized it measured its voltage. By using different peak values frequencies of applied AC travelling magnetic wave, obtained pumping characteristics pump. With same strength, was found...