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Revealing milling durations and sintering temperatures on conductivity and battery performances of Li_(2.25)Zr_(0.75)Fe_(0.25)Cl_(6)electrolyte

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Chinese Chemical Letters 2023年第5期34卷 525-529页

作者： Shuai Chen Chuang Yu Chaochao Wei Linfeng Peng Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Materials Huazhong University of Science and TechnologyWuhan 430074China

Halide electrolytes in solid-state batteries with excellent oxidative stability and high ionic conductivity have been well reported ***,the high-cost rare-earth elements and long duration of highrotation milling procure are the major ***,we have successfully synthesized the low cost Li_(2.25)Zr_(0.75)Fe_(0.25)Cl_(6)electrolyte consisting of abundant elements with comparable Li-ion conductivity in a short milling duration of 4 *** transition of the annealed sample was also carefully *** Ni_(0.6)Co_(0.2)Mn_(0.2)O_(2)/Li_(2.25)Zr_(0.75)Fe_(0.25)Cl_(6)/Li_(5.5)PS_(4.5)Cl_(1.5)/In-Li batteries using different halide electrolytes were constructed and cycled at different voltage ***-state battery using Li_(2.25)Zr_(0.75)Fe_(0.25)Cl_(6)electrolyte obtained from long milling duration delivers higher discharge capacities and superior capacity retention than shorter milling time between 3.0 and 4.3 *** delivers much higher discharge capacity when cycled at elevated temperature(60℃)and suffers fast capacity degradation when the upper cut-off voltage increases to 4.5 V at the same current *** work provides an efficiency synthesis strategy for halide solid electrolyte and studies its applications in all-solid-state batteries in a wide temperature range.

关键词： Solid inorganic electrolyte Solid state battery Halide electrolyte High temperature Synthesis process

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Design of the Filament Power Supply for the High-voltage Electron Accelerator with Insulated Core Transformer 4

Design of the Filament Power Supply for the High-voltage Ele...

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4th IEEE China International Electrical and Energy Conference, CIEEC 2021

作者： Nie, Lanxin Yang, Jun Xi, Cheng Huazhong University of Science and Technology The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9781728171494

The high-voltage electron accelerator with insulated core transformer (ICT) has competitive advantages in the irradiation processing industry due to its high efficiency and reliability. The filament power supply (F-PS) is a key component in the accelerator, which provides the filament heating power and make the filament emit an electron beam. To control the beam current of the accelerator more flexibly, instead of using a traditional regulating transformer, it is a better solution for such applications to adopt power electronic converters as the F-PS. This paper proposes an optimized power electronics scheme for the F-PS based on the LLC resonant converter with integrated magnetics. A novel integrated structure that applies magnetic integration technology is used so that the number and size of the magnetic components are reduced. Modelling air-gap magnetic field accurately is also demonstrated to guide design for integrated magnetics, ensuring the stable operation of the converter. The designs are verified by simulation. © 2021 IEEE.

关键词： Power converters

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Fault line selection in cooperation with multi-mode grounding control for the floating nuclear power plant grid

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Protection and Control of Modern Power Systems 2020年第1期5卷 184-193页

作者： Yikai Wang Xin Yin Wen Xu Xianggen Yin Minghao Wen Lin Jiang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074HubeiChina Department of Electrical Engineering and Electronics The University of LiverpoolLiverpool L693BXUK

The Floating nuclear power plant grid is composed of power generation,in-station power supply and external power *** ensure the safety of the nuclear island,the in-station system adopts a special power supply mode,while the external power supply needs to be adapted to different types of external *** of frequent single phase-ground faults and various fault forms,the fault line selection protection should be accurate,sensitive and *** paper presents a fault line selection method in cooperation with multi-mode grounding *** on the maximum united energy entropy ratio(MUEER),the optimal wavelet basis function and decomposition scale are adaptively chosen,while the fault line is selected by wavelet transform modulus maxima(WTMM).For high-impedance faults(HIFs),to enlarge the fault feature,the system grounding mode can be switched by the multi-mode grounding *** on the characteristic of HIFs,the fault line can be selected by comparing phase differences of zero-sequence current mutation and fault phase voltage mutation before and after the *** results using MATlab/Simulink show the effectiveness of the proposed method in solving the protection problems.

关键词： Floating nuclear power plant Multi-mode grounding control Wavelet transform modulus maxima(WTMM) Maximum united energy entropy ratio(MUEER) Phase difference Single phase-ground fault

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Low Temperature Plasma Sources for Effective Inactivation of Pathogenic Microbial Aerosols

Low Temperature Plasma Sources for Effective Inactivation of...

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2021 IEEE International Conference on Plasma Science, ICOPS 2021

作者： Liu, Dawei Huazhong University of Science and Technology State Key Lab of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering WuHan430074 China

ISBN: (纸本)9781665432276

In order to develop the LTP air filtration system which can effectively inactivate PMA, we studied the bioche mical mechanism of inactivating pathogenic microorganisms by LTP, and the physical process of charging and adsorption of PMA by LTP, and on this basis, we developed an efficient LTP source for effective inactivation of PMAs. The scalable prototype plasma air filtration system effectively killed all the bacteria within the inter cepted pathogenic aerosols. © 2021 IEEE.

关键词： Aerosols

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Design of a DC Busbar for the ITER PF Converter

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Plasma Science and technology 2014年第4期16卷 406-409页

作者：郭斌宋执权许留伟张明李金超蒋力傅鹏王敏董琳 College of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Institute of Plasma Physics Chinese Academy of Sciences China International Nuclear Fusion Energy Program Execution Center

The DC busbar is an important component for the ITER PF converter module to connect the converter and the reactor. This paper analyzes different cross-sections and different thermodynamic properties under natural-cooling and water-cooling conditions, and simulation is carried out by the software of the finite element method （FEM）. The result of the analysis shows that the water-cooling method is the better choice for the DC busbar.

关键词： cross-section temperature natural-cooling water-cooling DC busbar

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Switch Open-Circuit Faults Diagnosis in Three-Phase PWM Rectifier Based on Phase and Transient Model

Switch Open-Circuit Faults Diagnosis in Three-Phase PWM Rect...

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2023 IEEE PELS Students and Young Professionals Symposium, SYPS 2023

作者： Lin, Zhongdong Peng, Li Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350307832

Numerous studies have shown that the power switch devices have high fault rate in converters. Aiming at above problem, this paper proposes a switch open-circuit faults (SOCF) diagnosis method in three-phase pulse-width modulation (PWM) voltage source rectifier (VSR). The diagnosis algorithm is based on phase information from the phase-locked loop (PLL) and line voltage deviations calculated by the transient model. The proposed method can accurately and rapidly diagnose all kinds of single and double SOCF, without extra hardware. Finally, simulations in MATlab/Simulink verify the robustness and effectiveness of the proposed method. © 2023 IEEE.

关键词： Pulse width modulation

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Online Multiparameter Estimation with Position Error Correction for Unified Synchronous Machine Sensorless Drives

Online Multiparameter Estimation with Position Error Correct...

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2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023

作者： Liu, Zirui Kong, Wubin Fan, Xinggang Wang, Fei Qu, Ronghai Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350316445

Parameters' accuracies are essential for model-based sensorless control in synchronous machine drives. In this paper, a multiparameter adaptive observer and a position error optimizer are presented to obtain real-time parameter information in the absence of rotor position data for unified synchronous machine (SM). The adaptive observer is based on the misaligned dq-axes' small-signal impedance model where dq-axes EMF coupling terms are well considered. All parameters can achieve high accuracy under entire operation region. In the case of isotropic SMs, the estimated parameters can be directly utilized in the model-based observer to acquire high precision position observation. And, for anisotropic SMs, an optimizer is introduced to correct parameter inaccuracies caused by position error. The effectiveness of the proposed adaptive observer and optimizer is evaluated through a combination of experiments and simulations, providing comprehensive validation of their performance. © 2023 IEEE.

关键词： Multiparameter Estimation Sensorless Control Unified Synchronous Machine (SM)

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Characteristics Analysis of Three-Phase Symmetrical Phase-Locked Loop under Non-Ideal Grid Conditions

Characteristics Analysis of Three-Phase Symmetrical Phase-Lo...

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2023 IEEE International Conference on Power Science and technology, ICPST 2023

作者： Su, Tianyi Lin, Hua Li, Shaojie Wang, Xingwei Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350311358

Under weak grids, the output impedance of grid-connected inverter is coupled with the grid impedance, leading to poor quality of the grid current. To address this issue, the symmetrical phase-locked loop (PLL) has been proposed which can eliminate the frequency coupling and attribute the system model to be symmetrical. Although the system performances well under steady state, the characteristics of the inverter is unclear under non-ideal conditions at present. In this article, by investigating the inverter performance with the symmetrical PLL under different grid conditions, it is founded that both the dynamic and steady-state characteristics become worse compared to that with synchronous reference frame (SRF) PLL. The experiments validate the correctness of the theoretical analysis. © 2023 IEEE.

关键词： Phase locked loops

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Ce3+-doped glass scintillator with high density and light yield for imaging application

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Ceramics International 2025年

作者： Yang, Dong Ge, Kun Ban, Huiyun Yuan, Huiping Qian, Sen Hua, Zhehao Cai, Hua Chen, Danping Han, Jifeng Qiao, Xvsheng Ren, Jing Sun, Xinyuan Tang, Gao Yin, Shenghua Zhang, Minghui Xiao, Jiawen Beijing Glass Research Institute Beijing101111 China Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Particle Detection and Electronics Beijing100049 China State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 China China Building Materials Academy Beijing100024 China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai201800 China Key Lab of Radiation Physics and Technology of MOE Sichuan University Chengdu610065 China Key Laboratory of Rare Earths Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341003 China State Key Laboratory of Silicon and Advanced Semiconductor Materials & Department of Materials Science and Engineering Zhejiang University Hangzhou310027 China College of Physics and Optoelectronic Engineering Harbin Engineering University Harbin150001 China Department of Physics and Key Laboratory of Jiangxi Province for Special Optoelectronic Artificial Crystal Materials Jinggangshan University Ji'an343009 China College of Materials and Chemistry China Jiliang University Hangzhou310018 China Nuclear Instrument CO. LTD. Beĳing100176 China Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai201899 China College of Materials Science and Engineering Beijing University of Technology Beijing100124 China

A series of Ce3+-doped Gd2O3-GdF3-Al2O3-B2O3-SiO2 glass scintillators (GSCx and GLCx) were successfully synthesized in reducing atmosphere for future imaging application. The transmittance of GSCx glasses exceeds 85 % in range of 500–800 nm, and the cut-off edge red shifts as the Ce3+ concentration increases. In photoluminescence (PL), GSCx glass scintillators have a 360–600 nm broadband emission with a shoulder peak at around 450 nm. Meanwhile, the PL lifetime of GSCx glasses is close to the CeF3 crystals, and the PL QY of GSC3 glass scintillator reaches up 70.2 %. For scintillation application, the integral XEL intensity of GSC2 and GSC3 glasses is 31.3 % and 24.4 % of that of BGO crystal. GLC2 and GLC3 glasses exhibit similar spatial resolution of approximately 7 lp·mm−1. Moreover, the light yields of GSC2 and GSC3 glass scintillator are 1702 and 1690 ph/MeV excited by γ-ray, respectively. The nonproportionality of GSCx glasses is less than 3 % in the range of 100–1400 keV due to the large density and Zeff. As Ce3+ concentration increases, both the fast and slow components of the glasses decrease (103.7 ns–89.7 ns, 1454.4 ns–1012.8 ns), and the proportion of fast component also increased from 3.3 % to 4.7 %. For γ-ray imaging, the scintillation light events of the glass can be observed from SiPM array, and the central position (−2, −1) have the highest count rate of the system. The results show that GSCx and GLCx glass scintillators deserve further development for future applications. © 2025

关键词： Gamma rays

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Investigation on the Arc Ignition Characteristics and Energy Absorption of Liquid Metal Current Limiter Based on Self-Pinch Effect

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Plasma Science and technology 2016年第5期18卷 531-537页

作者：琚兴宝孙海顺杨倬张俊民 State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology) Wuhan 430074 China School of Electrical Engineering Xi'an Jiaotong University Xi'an 710049 China School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China

The GaInSn liquid metal current limiter based on the fluid pinch effect has broad application prospects due to its particular properties. However, the limited rated current and abil- ity of power dissipation are the critical problems for its wide application. Firstly, the temperature distribution of the liquid metal current limiter （LMCL） was obtained by experiments with a rated current of 1 kA and the arc ignition phenomenon was observed with 1.5 kA, which indicates that the rated current is mainly limited by the arc rather than the high temperature compared to the traditional switchgears. Furthermore, an improved method is proposed by adding the paralleled pure resistance, impedance or another LMCL element to protect the setup from the fault energy concentration in the setup. The problem of a slower arc voltage increasing rate can be solved by adding a paralleled impedance with suitable parameters. Finally, the current limiting properties based on the improved method were investigated and the alternating oscillating current was found between two paralleled LMCL elements owing to their deviation of arc ignition in reality.

关键词： arc liquid metal current limiter fluid pinch effect

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