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2024 5th International Conference on Electrical, Electronic Information and Communication engineering, EEICE 2024

作者： Han, Cheng Cheng, Zhifeng Lin, Weijie Tian, Ye Zhang, Yuchen Rao, Bo Jin, Xinyi International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

Spectral radiation imaging diagnostic systems utilizing PDA (avalanche PhotoDiode Array) have been developed and deployed on the HFRC device (HUST Field Reversed Configuration Device). These systems are designed to measure Hα radiation imaging, plasma velocity, orientation, and shape. Their innovative features include higher spatial resolution, integrated system design, flexible measurement, and superior electronic performance. This paper discusses the selection of basic electronic circuits, circuit analysis, parameter design, and noise analysis in detail. The accuracy of the design is validated through simulation and practical testing. The final system parameters achieved a bandwidth of 610 kHz, low noise of 2.5 mV, approximately 3% system overshoot, and a rising time of 468.5 ns. Additionally, preliminary measurement results are provided. © Published under licence by IOP Publishing Ltd.

关键词： Flexible electronics

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A Control Strategy without Position Sensor in PMSM Electric Vehicle Drive

A Control Strategy without Position Sensor in PMSM Electric ...

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2023 IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2023

作者： Long, Zeyang Li, Zixin Wang, Shuanghong Huazhong University of Science and Technology School of Electric and Electronic Engineering Wuhan China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350396867

Permanent-Magnet Synchronous Motor (PMSM) is widely used in the electric vehicle (EV) industry. Due to the instability and the cost of the position sensor, massive studies have been done to achieve the control without position sensor on PMSM. This paper analyzes the switching process from I/F strategy to Sliding Mode Observer (SMO) strategy in details, and also introduces the framework of I/F strategy with model predictive controller (MPC) as well as SMO used in the model. Furthermore, a new optimization algorithm called Angle Weighting Switching Strategy (AWSS) is proposed to smooth the transition process so as to mitigate the current-jitter and reduce speed fluctuation. Moreover, simulation between conventional switching method and the proposed method has been done to validate the effectiveness and robustness of the proposed control algorithm. © 2023 IEEE.

关键词： Permanent magnets

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Improved Resonant Frequency Tracking Strategy based on Load Parameter Prediction for Linear Oscillatory Machine

Improved Resonant Frequency Tracking Strategy based on Load ...

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2023 IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2023

作者： Gong, Yifan Cheng, Yang Xu, Wei Liao, Kaiju Ge, Jian Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China Huazhong University of Science and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350396867

As the key power part of the linear compressor, the linear oscillatory machine (LOM) has been paid more attention by both academia and industry recently for its compact size, high efficiency, low vibration, etc. In practice, the efficiency of LOM is significantly impacted by the changes in load parameters, of which the best working point can be tracked by the resonant frequency tracking control. However, the traditional resonant frequency tracking control with the idea of stroke-current phase suffers some serious problems, like slow tracking speed, low accuracy, large current peak during starting, fluctuate amplitude of piston, and so on. In this paper, a Kalman filter for the mechanical system of LOM is proposed, which avoids the impact of environmental noise and obtains the observed values of load parameters. On this basis, a parameter correction scheme based on gradient descent method is proposed. By calculating the corresponding gradient matrix, iterative adjustment and correction of the covariance matrix in the Kalman filter are realized. The combination of the two realizes the load parameter prediction of the LOM, and on this basis, completes the frequency control of the LOM. Comprehensive simulation results have fully demonstrated the advantages of proposed control strategy compared to those of traditional methods. © 2023 IEEE.

关键词： Natural frequencies

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Low-Temperature Carbonized Nitrogen-Doped Hard Carbon Nanofiber Toward High-Performance Sodium-Ion Capacitors

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Energy & Environmental Materials 2023年第4期6卷 129-136页

作者： Congkai Sun Xiong Zhang Yabin An Chen Li Lei Wang Xiaohu Zhang Xianzhong Sun Kai Wang Haitao Zhang Yanwei Ma Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China School of Engineering Sciences University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Advanced Fibers and Energy StorageSchool of Material Science and EngineeringTiangong UniversityTianjin 300387China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu ZhongkeJinan 250013China Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Carbon nanofiber(CNF)was widely utilized in the field of electrochemical energy storage due to its superiority of conductivity and ***,CNF was generally prepared at relatively high ***,nitrogen-doped hard carbon nanofibers(NHCNFs)were prepared by a lowtemperature carbonization treatment assisted with electrospinning *** functional theory analysis elucidates the incorporation of nitrogen heteroatoms with various chemical states into carbon matrix would significantly alter the total electronic configurations,leading to the robust adsorption and efficient diffusion of Na atoms on electrode *** obtained material carbonized at 600°C(NHCNF-600)presented a reversible specific capacity of 191.0 mAh g^(−1)and no capacity decay after 200 cycles at 1 A g^(−1).It was found that the sodium-intercalated degree had a correlation with the electrochemical impedance.A sodium-intercalated potential of 0.2 V was adopted to lower the electrochemical *** constructed sodium-ion capacitor with activated carbon cathode and presodiated NHCNF-600 anode can present an energy power density of 82.1 Wh kg^(−1)and a power density of 7.0 kW kg^(−1).

关键词： electrochemical presodiation low-temperature carbonization nitrogen-doped hard carbon nanofibers sodium-ion capacitors

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A Novel Method Based on Stacking Model for Remaining Useful Life Prediction of Lithium-ion Batteries 26

A Novel Method Based on Stacking Model for Remaining Useful ...

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26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Li, Zhuohao Shi, Qionglin Xia, Junyi Wang, Kangli Jiang, Kai Huazhong University of Science and Technology School of Electrical and Electronic Engineering Wuhan China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350317589

As an important energy storage technology, lithium-ion batteries are widely used in various industrial fields, effectively alleviating the pressure of energy transition and environmental pollution. In order to ensure the safe and efficient long-term service of lithium-ion batteries, it is particularly important to accurately estimate the remaining useful life (RUL). In this paper, a novel method based on stacking model is proposed for predicting the RUL of lithium-ion batteries. Firstly, multiple health features are extracted from capacity, voltage curve, and capacity-voltage curve. Then their correlations with RUL are analyzed using state of Health (SOH), current charging time, discharge time to 3.8v, discharge time to 3.35v, discharge time in the voltage range of 3.35v-3.8v and voltage at the turning point of the charging capacity-voltage curve of lithium-ion batteries. Next, a stacking model including gradient boosting decision tree, support vector regression, random forest and multiple linear regression is constructed. Finally, to validate the accuracy of the proposed method, it is applied to batteries from the Hawaii Natural Energy Institute (HNEI) dataset, and compared with the performance of individual model. The results show that the RUL prediction error of the proposed method is only 11.3, which has a high accuracy. © 2023 IEEE.

关键词： Lithium-ion batteries

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Design and ﬁrst result of combined Langmuir-magnetic probe on J-TEXT tokamak

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Plasma Science and technology 2022年第5期24卷 39-47页

作者： Qinghu YANG Zhipeng CHEN Zhigang HAO Yangming ZHAO Xin XU Shuhao LI Jie YANG Wei YAN Zhonghe JIANG Zhongyong CHEN Nengchao WANG Zhoujun YANG Yuan PAN Yonghua DING the J-TEXT Team International Joint Research Laboratory of Magnetic Conﬁnement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China

In order to measure boundary electrostatic and magnetic fluctuations simultaneously,a combined Langmuir-magnetic probe(CLMP)has been designed and built on joint-Texas experimental *** probe consists of 8 graphite probe pins and a 3D magnetic probe,driven by a mechanical pneumatic *** means of simulation,the shielding effect of the graphite sleeve on the magnetic fluctuation signal is explored,and the influence of the eddy current was reduced by cutting the graphite *** the experiment,it has been verified that the mutual inductance of electromagnetic signals can be ignored,and a 70–90 k Hz electromagnetic mode is observed around the last closed magnetic *** establishment of CLMP provides data for the exploration of the coupling of electrostatic and magnetic fluctuations.

关键词： J-TEXT Langmuir probe magnetic probe eddy current effect electromagnetic mode

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Effect of ball milling time on the microstructure and compressive properties of the Fe–Mn–Al porous steel

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International Journal of Minerals,Metallurgy and Materials 2023年第5期30卷 917-929页

作者： Lingzhi Xie Zhigang Xu Yunzhe Qi Jinrong Liang Peng He Qiang Shen Chuanbin Wang Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Wuhan Second Ship Design and Research Institute Wuhan 430205China

In the present work,Fe–Mn–Al–C powder mixtures were manufactured by elemental powders with different ball milling time,and the porous high-Mn and high-Al steel was fabricated by powder *** results indicated that the powder size significantly decreased,and the morphology of the Fe powder tended to be increasingly flat as the milling time ***,the prolonged milling duration had limited impact on the phase transition of the powder *** main phases of all the samples sintered at 640℃ were α-Fe,α-Mn and Al,and a small amount of Fe2Al5 and *** the sintering temperature increased to 1200℃,the phase composition was mainly comprised of γ-Fe and α-*** weight loss fraction of the sintered sample decreased with milling time,i.e.,8.3wt% after 20 h milling compared to15.3wt% for 10 *** Mn depletion region(MDR) for the 10,15,and 20 h milled samples was about 780,600,and 370 μm,*** total porosity of samples sintered at 640℃ decreased from ~46.6vol% for the 10 h milled powder to ~44.2vol% for 20 h milled *** sintering at 1200℃,the total porosity of sintered samples prepared by 10 and 20 h milled powder was ~58.3vol% and ~51.3vol%,*** compressive strength and ductility of the 1200℃ sintered porous steel increased as the milling time increased.

关键词： powder metallurgy porous steel ball milling time microstructure evolution compressive properties

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Attention Pyramid Dilated Region-based Model for Metallurgical Defect Detection

Attention Pyramid Dilated Region-based Model for Metallurgic...

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2024 International Conference on Computational Intelligence and Communication System, CCICS 2024

作者： Cheng, Danpeng Sha, Wuxin Xu, Zuo Huang, Lixin Zhang, Zhendong Du, Yunpeng Zhu, Zhihua Cao, Yuan-Cheng State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China CITIC Dicastal Co. Ltd. Qinhuangdao066011 China

Defect recognition is the key to realizing automatic visual inspection and quality control in intelligent manufacturing. Deep learning (DL) has been widely applied to locate damaged areas in images, characterize impurities of materials and further analyze the quality of products. However, automatic defect detection by DL in practical industrial applications is still a challenge due to the lack of sufficient datasets and appropriate recognition methods. Here, a novel Attention Pyramid Dilated Region-based Convolutional Neural Network (ADRCNN) is proposed to realize the multi-scale defect recognition and pixel-level instance segmentation of metallographic images. We also collected a dataset containing 900 images of commercial A356 aluminum alloy with different casting defects. The ADRCNN model is evaluated on our dataset with an average detection accuracy of 87.2% and 93.3% on validation and test sets respectively. To address the overfitting problem, a pretraining fine-tuning strategy is implemented by using the pretraining weights from large-scale datasets and temporarily freezing the weights of the backbone network during the training process. The experimental results show that the proposed model can achieve satisfactory defect segmentation in metallographic images, promoting the development of intelligent manufacturing in alloy industries. © Published under licence by IOP Publishing Ltd.

关键词： Aluminum alloys

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Chlorine-rich lithium argyrodites enables superior performances for solid-state Li-Se batteries at wide temperature range

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Rare Metals 2022年第12期41卷 4065-4074页

作者： Jin-Yan Lin Shuai Chen Jia-Yang Li Dian Yu Xiang-Ling Xu Chuang Yu Shao-Qing Chen Xue-Fei Miao Lin-Feng Peng Chao-Chao Wei Chong-Xuan Liu Shi-Jie 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 Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Advanced Metallic and Intermetallic Materials Technology School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China

All-solid-state Li-Se battery shows great potential as a candidate for next-generation energy storage devices due to its high energy density and ***,the low ionic conductivity of the solid electrolytes and large volume changes of Se active materials are two of the major issues that limit its ***,a simple solid-state reaction method is applied to synthesize chlorine-rich argyrodite Li_(5.5)PS_(4.5)CI_(1.5)electrolyte with high conductivity of 6.25 mS·cm^(-1)at room *** nanotube(CNT)is introduced as the host for Se to obtain Se/CNT composite with both enhanced electronic conductivity and lower volume expansion during the electrochemical reaction ***-solid-state Li-Se battery using Li_(5.5)PS_(4.5)CI_(1.5)as solid electrolyte combined with Se/CNT cathode and Li-In anode shows a discharge capacity of 866 mAh·g-1for the 2nd cycle under0.433 mA·cm-2at room ***,the assembled battery delivers a high discharge capacity of1026 mAh·g^(-1)for the 2nd cycle when cycled at the same current density at 60℃and maintains a discharge capacity of 380 mAh·g^(-1)after 150 *** to the high Li-ion conductivity of Li_(5.5)PS_(4.5)CI_(1.5)electrolyte,the assembled battery displays a high discharge capacity of 344 mAh·g^(-1)under 0.113 mA·cm^(-2)at-20℃C and remains 66.1%after200 *** addition,this all-solid-state Li-Se battery shows ultralong cycling performances up to 1000 cycles under 0.433 mA·cm^(-2)at-20℃.This work offers the design clue to fabricate the all-solid-state Li-Se battery workable at different operating temperatures with an ultralong cycling life.

关键词： Lithium argyrodite Chlorine-rich All-solidstate Li-Se batteries Operating temperatures Long cycling performances

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Design and development of the beamline for a proton therapy system

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Nuclear Science and Techniques 2021年第12期32卷 53-63页

作者： Bin Qin Xu Liu Qu-Shan Chen Dong Li Wen-Jie Han Ping Tan Zhong-Qi Zhang Chong Zhou Ao-Te Chen Yi-Cheng Liao Wei Wang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

A proton therapy(PT)facility with multiple treatment rooms based on the superconducting cyclotron scheme is under development at Huazhong University of Science and technology(HUST).This paper attempts to describe the design considerations and implementation of the PT beamline from a systematic *** considerations covering beam optics and the influence of high-order aberrations,beam energy/intensity modulation,and beam orbit correction are *** addition to the technical implementation of the main beamline components and subsystems,including the energy degrader,fast kicker,beamline magnets,beam diagnostic system,and beamline control system are introduced.

关键词： Proton therapy Beamline Beam optics Beam energy/intensity modulation

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