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Analysis of electromagnetic Performance of an AUV Wireless Charge Device with New Coil Structure 1

18th Annual Conference of China Electrotechnical Society, ACCES 2023

作者： Liu, Longjian Zhang, Ming Rao, Bo Liu, Zhijian Guo, Cheng Yu, Zhongming Faculty of Electric Power Engineering Kunming University of Science and Technology Kunming650500 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China

ISBN: (数字)9789819713516

ISBN: (纸本)9789819713509

This paper proposed a an AUV Wireless Charge Device With New Coil Structure, including transmitting coil, receiving coil, and the magnetic core used for magnetic field shielding. The transmitting coil is arc-shaped coil, with 60° radian, and it is arranged by six identical coils along the circumference, and the identical coils are connected in series. The receiving coil is also arc-shaped coil, with 120° radian, and it is arranged by three identical coils along the circumference, and the identical coils are connected in series or parallel. The new-structure coil has the advantage that the inductances of transmitting coil and receiving coil is almost constant, and it is especially suitable for AUV wireless charging devices. And it can solve the problem of the coupling coefficient of traditional AUV wireless charging devices changing with the AUV roll angle. © Beijing Paike Culture Commu. Co., Ltd. 2024.

关键词： Inductance

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Development of spectral radiation imaging diagnostic systems for HFRC Device 5

Development of spectral radiation imaging diagnostic systems...

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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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Low-carbon Operation of Combined Heat and Power Integrated Plants Based on Solar-assisted Carbon Capture

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1138-1151页

作者： Xusheng Guo Suhua Lou Yaowu Wu Yongcan Wang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074China State Grid Sichuan Electric Power Research Institute Chengdu 610041China

Accelerating the development of renewable energy and reducing CO_(2)emissions have become a general consensus and concerted action of all countries in the world. The electric power industry, especially thermal power industry, is the main source for fossil energy consumption and CO_(2)emissions. Since solvent-based post-combustion carbon capture technology would bring massive extra energy consumption, the application of solar-assisted carbon capture technology has attracted extensive attention. Due to the important role of coal-fired combined heat and power plants for serving residential and industrial heating districts, in this paper, the low-carbon operation benefits of combined heat and power integrated plants based on solar-assisted carbon capture(CHPIP-SACC) are fully evaluated in heat and power integrated energy system with a high proportion of wind power. Based on the selected integration scheme, a linear operation model of CHPIP-SACC is developed considering energy flow characteristics and thermal coupling interaction of its internal modules. From the perspective of system-level operation optimization, the day-ahead economic dispatch problem based on a mix-integer linear programming model is presented to evaluate the low-carbon benefits of CHPIP-SACC during annual operation simulation. The numerical simulations on a modified IEEE 39-bus system demonstrate the effectiveness of CHPIP-SACC for reducing CO_(2)emissions as well as increasing the downward flexibility. The impact of different solar field areas and unit prices of coal on the low-carbon operation benefits of CHPIP-SACC is studied in the section of sensitivity analysis.

关键词： Solar-assisted carbon capture CO_(2)emission reduction combined heat and power integrated plant heat and power integrated energy system wind power

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Simplified Time-Domain Design Methodology for LLC Resonant Converter in EV Charging Station Application 3

Simplified Time-Domain Design Methodology for LLC Resonant C...

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3rd International Conference on Power Systems and Electrical technology, PSET 2024

作者： Yuan, Ye Xu, Lin Yao, Chuan Yuan, Jialing Wang, Xuehua Ruan, Xinbo State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China Wuhan Second Ship Design and Research Institute Wuhan China

ISBN: (纸本)9798350353204

LLC resonant converter featuring excellent soft-switching characteristic has been widely used in electric vehicle (EV) charging stations and other applications requiring isolated voltage conversion. The Fundamental Harmonic Approximation (FHA) model has been widely used in the field of resonant converter due to its simple and intuitive characteristics. When the switching frequency deviates from the resonant frequency, the method no longer maintains high accuracy. In this paper, a more accurate parameter design method based on the simplified time-domain model is proposed, considering the load characteristic of the charging stations. Finally, the simulation model verifies that the simplified design method has higher accuracy in predicting voltage gain. Meanwhile, the resonant tank parameters designed based on this method make the converter more efficient in situations where voltage and frequency vary across a wide range. © 2024 IEEE.

关键词： Resonant converters

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General Description of Solid Armatures in electromagnetic Railguns 10

General Description of Solid Armatures in Electromagnetic Ra...

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10th Euro-Asian Pulsed Power Conference, 25th International Conference on High-Power Particle Beams and 20th International Symposium on electromagnetic Launch technology, EAPPC-BEAMS-EML 2024

作者： Chen, Lixue Zhang, Wenhao Li, Lidong Xu, Shengqin State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology Key Laboratory of Pulsed Power Technology Ministry of Education School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9789038661353

Armature, as an important part of the electromagnetic launch system, is a current carrier which converts electric energy into kinetic energy of projectiles, and it often suffers extreme environment in the launch process. Therefore, the performance of launch system is directly affected by the armature whose structure is the fundamental of the application of launch technology. Among various armature types, solid armatures are the most widely used because of some characteristics of them, like high efficiency and low mass. Based on some key functions of solid armatures, three kinds of requirements including current-carrying capacity, mechanical pressure and electromagnetic contact pressure are proposed in this paper. Besides, research progress of material and structure of the solid armature and its optimization is also introduced in this paper. © 2024 Eindhoven University of technology.

关键词： Kinetic energy

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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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High-rate sodium metal batteries enabled by trifluormethylfullerene additive

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Nano Research 2022年第8期15卷 7172-7179页

作者： Pengju Li Xiaobo Huang Zhipeng Jiang Han Zhang Pengwei Yu Xing Lu Jia Xie State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Sodium metal is a promising anode for sodium batteries due to its high theoretical capacity and low ***,the serious Na dendrite growth and low Coulombic efficiency,especially at high current densities/cycling capacities,severely limit the application of sodium metal ***,trifluoromethylfullerene,C_(60)(CF_(3))_(6),is designed as an electrolyte additive to enable the high-rate cycling of sodium metal anodes with high Coulombic *** CF3 groups contribute to the formation of stable NaF-rich solid electrolyte interface layer,while C_(60)cages induce the uniform distribution of sodium ions and promote the formation of smooth and compact ***,Na||Cu cell with C_(60)(CF_(3))_(6)can be cycled at 2 mA·cm^(−2)and 10 mAh·cm^(−2)over 180 cycles with an average Coulombic efficiency of 99.9%,and Na||Na cell can be cycled at 10 mA·cm^(−2)over 600 ***,Na||NaV2(PO_(4))_(3)@C full cell exhibits high capacity retention of 84%over 2,000 cycles at 20 C(~3 mA·cm^(−2)).

关键词： sodium metal anode fullerene trifluormethylfullerene high rate electrolyte additive

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A Real-Time Junction Temperature Estimating Method for SiC MOSFET Based on the Turn-on Drain-Source Current Oscillation

A Real-Time Junction Temperature Estimating Method for SiC M...

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International Conference of Electrical, Electronic and Networked Energy Systems, EENES 2024

作者： Yang, Fengming Liang, Lin Zhang, Ziyang State Key Laboratory of Advanced Electromagnetic Technology Power Electronics and Energy Management Key Laboratory Ministry of Education of China School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430070 China

ISBN: (纸本)9789819618514

Online junction temperature (Tj) measurement is critical for SiC MOSFET reliability evaluation health management and life prediction. In order to make the tradeoff between availability, simplicity, as well as accuracy, this article demonstrates a real-time junction temperature estimating method by selecting the current oscillation peak of drain source (Ioscpeak) during turn-on transient as a temperature sensitive electrical parameter (TSEP). The theoretical and simulation analysis results show that the Ioscpeak is available to be a TSEP. Then, the model of Ioscpeak and Tj is derived through fitting curve based the experimental results. The voltage and load current dependency of proposed method are also discussed. The experimental results demonstrate that the bus voltage level has a negligible influence to the relationship between the Ioscpeak and the Tj, the value of Ioscpeak is increasing with the increment of current level at the specific temperature. The sensitivity of proposed method has a satisfactory performance of junction temperature estimation. The estimation circuit of proposed method has a simplicity hardware with low cost and easy to be implanted with gate drive of SiC MOSFET. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： MOSFET devices

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Modeling and Analysis of DFIG-WT-Dominated Power Systems in electromagnetic Timescale Considering Negative Sequence Control

Modeling and Analysis of DFIG-WT-Dominated Power Systems in ...

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2024 IEEE Sustainable Power and Energy Conference, iSPEC 2024

作者： Guo, Zeren Zhu, Jianhang Hu, Jiabing Zhao, Guojie Wu, Zefei Du, Buyang Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology Wuhan China The University of Hong Kong Department of Electrical and Electronic Engineering Hong Kong

ISBN: (纸本)9798350395075

The requirement for negative sequence control introduces time-varying coupling between the positive and negative sequences in a doubly fed induction generator (DFIG). The potential risk of electromagnetic oscillation in DFIG-based wind turbine (WT)-dominated power systems (DFIG-WTPS) necessitates small-signal modeling and stability analysis considering time-varying characteristics. However, the traditional linear time-invariant (LTI) modeling method based on Park transformation is no longer suitable. Therefore, this paper applies the linear time-periodic (LTP) modeling method based on trajectory linearization to the small-signal modeling of DFIG- WTPS in electromagnetic timescale. Floquet theory is further introduced to calculate the L TP eigenvalues. Then, the influence of series capacitor and control parameters on small-signal stability is analyzed. Finally, the results from the nonlinear DFIG- WTPS model demonstrate the effectiveness of the proposed analysis. © 2024 IEEE.

关键词： Eigenvalues and eigenfunctions

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Modelling and analysis of half-/full-bridge hybrid MMC when riding through DC-side pole-to-ground fault

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High Voltage 2022年第3期7卷 496-509页

作者： Zhen He Jiabing Hu Lei Lin Pingliang Zeng School of Automation Hangzhou Dianzi UniversityHangzhouChina State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhanChina

In a modular multilevel converter-based high-voltage direct current(MMC-HVDC)system,the dc fault ride through(FRT)control is an effective way to deal with a dc-side pole-to-ground(PTG)***,the setting of FRT duration brings potential hazards:1)MMC will face the risk of“secondary short circuit”if FRT duration is short;2)ac grid may have power angle stability issue if FRT duration is *** avoid these hazards and provide theoretical guidance for the FRT duration setting,transient behaviour of dc fault current during the PTG FRT stage is explored in this ***,challenges of the transient analysis are summarised as non-linearity and high-order *** light of this,numerical and Hilbert-Huang Transformation methods are introduced to evaluate the non-linearity *** is found that the path of MMC from dc current to dc internal voltage is weakly ***,a linear transient model is built to analyse the dc fault *** participation factor analysis,the order of the proposed model is further reduced,so that an analytical expression of the dc fault current is approximately *** on the analytical expression,regularities and mechanism of dc fault current are fully *** of the transient analysis to the setting of FRT duration is elaborated in ***,the PSCAD/EMTDC simulation verifies the validity of the proposed model and analytical expression.

关键词： fault ground setting

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