检索结果-内蒙古大学图书馆

2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Zhao, Yanqing Ai, Sheng Dou, Yinghua Mei, Dan School of Electrical Engineering the Naval University of Engineering State Key Laboratory of Electromagnetic Energy Science and Technology Wuhan430033 China

ISBN: (纸本)9798331530174

In this paper, a two-stage DC-DC converter topology is proposed to tackle the challenges of wide input range and high voltage levels in vehicle-mounted DC buses. A three-level Buck (TL Buck) converter is utilized as the front stage, thereby reducing the voltage stress on the MOSFETs to half of the input voltage. This makes it suitable for applications with high voltage levels and wide input ranges. Additionally, a star-connected three-phase LLC is employed as the rear stage to minimize output current ripple and achieve zero voltage switching (ZVS) and zero current switching (ZCS). A cascaded loop control with fixed frequency modulation strategy is adopted, demonstrating strong adaptability to wide input voltages. Finally, a simulation model is constructed to verify the correctness and feasibility of the proposed topology and control strategy. © 2024 IEEE.

关键词： Buck converter

来源：评论

学校读者我要写书评

暂无评论

Redundant Strategy of T-Type DC/DC MMC Based on Third Harmonic Injection for Submodule Failure

Redundant Strategy of T-Type DC/DC MMC Based on Third Harmon...

引用

2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Tang, Pengfei Wang, Dan Zhang, Hongyu Fan, Ruoxuan Mao, Chengxiong School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9798331530174

In this paper, an endogenous AC optimization strategy for T-type topology DC/DC MMC(TDC-MMC) is proposed and applied to the protection strategy for sub-module faults. The endogenous AC model of TDC-MMC is established under the dq coordinate system. Based on this model, two endogenous AC strategies are derived under the conditions of loss minimization and voltage minimization, respectively. The optimization of endogenous AC is achieved by further introducing the third harmonic and redefining the voltage vector relationship under the minimum voltage condition. The optimal amplitude and phase of the third harmonic for each bridge arm are then determined. In a simulation of a 3 kV/1 kV DC transmission system, the working principle of the strategy is verified by applying the protection strategy to the sub-module fault cases of the HV Arm, MV Arm and LV Arm. © 2024 IEEE.

关键词： Harmonic analysis

来源：评论

学校读者我要写书评

暂无评论

Rejuvenating LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cathode directly from battery scraps

引用

eScience 2023年第2期3卷 112-122页

作者： Yaqing Guo Chi Guo Pengjie Huang Qigao Han Fuhe Wang Hao Zhang Honghao Liu Yuan-Cheng Cao Yonggang Yao Yunhui Huang State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of EducationSchool of Optoelectronic Materials&TechnologyJianghan UniversityWuhan 430056China

Battery recycling is indispensable for alleviating critical material shortages and enabling sustainable battery ***,current methods mostly focus on spent batteries,which not only require sophisticated disassembly and material extraction but also have unknown chemistries and states of health,resulting in high costs and extreme challenges to achieve ***,we propose the direct recycling and effective regeneration of air-degraded LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM523)cathode directly from battery scraps generated during battery *** NCM523 shows surface degradation only a few nanometers deep and accordingly can be regenerated without adding Li,achieving restored properties(170 mAh g^(-1) at 0.1 C,92.7%retention after 1000 cycles)similar to those of fresh commercial *** analysis shows that scrap recycling has a profit of$1.984 kg^(-1),which is~10 times higher than conventional recycling,making it practical and economical to rejuvenate slightly degraded electrode materials for sustainable battery manufacturing.

关键词： Battery scrap Battery recycling Air degradation Cathode regeneration Techno-economic analysis

来源：评论

学校读者我要写书评

暂无评论

Nonparametric Sliding Mode Predictive Current Control for Linear Induction Motor

Nonparametric Sliding Mode Predictive Current Control for Li...

引用

2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Guo, Yingcong Xu, Wei Xiao, Han Ge, Jian School of Electrical Engineering Southwest Jiaotong University Chengdu610031 China Institute of Electrical Engineering Key Laboratory of High Density Electromagnetic Power and Systems Chinese Academy of Sciences Beijing100190 China School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China

ISBN: (纸本)9798331530174

Model predictive control (MPC) enables the linear induction motor (LIM) drive system to maintain good performance despite large distortions in the input voltage waveform, and is particularly suitable for applications with lower converter switching frequencies, such as urban rail transit. However, the parameters of the LIM vary dramatically due to the end effect, which reduces the control performance of the MPC. This paper presents a nonparametric sliding mode predictive current control method to enhance the parametric robustness of MPC. The cost function of nonparametric current control is constructed to overcome the limitation of model predictive control, which is greatly affected by parameter accuracy. The simulation results show that the proposed method can maintain the good control performance of the LIM drive system under the condition of inaccurate parameters, effectively improve the robustness of the system, and has certain engineering significance. © 2024 IEEE.

关键词： Cost functions

来源：评论

学校读者我要写书评

暂无评论

Metabolic flux simulation of microbial systems based on optimal planning algorithms

引用

Green Chemical engineering 2023年第2期4卷 146-159页

作者： Chen Yang Boyuan Xue Yiming Zhang Shaojie Wang Haijia Su State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of BioprocessBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China

The genomic scale metabolic networks of the microorganisms can be constructed based on their genome se-quences,functional annotations,and biochemical reactions,reflecting almost all of the metabolic *** simulations of metabolic fluxes could make these functions be visualized,thereby providing guidance for rational engineering design and experimental *** review summarized recently devel-oped flux simulation algorithms of microbial *** the single microbial systems,the optimal planning algorithm has low complexity because there is no interaction between microorganisms,and it can quickly simulate the stable metabolic states through the pseudo-steady ***,the experimental conditions of single microbial systems are easier to reach or close to the optimal states of simulation,compared with pol-ymicrobial *** polymicrobial culture systems could outcompete the single microbial systems as they could relieve metabolic pressure through metabolic division,resource exchange,and complex substrate ***,they provide varieties of intracellular production environments,which render them the po-tential to achieve efficient bioproduct ***,due to the quasi-steady hypothesis that restricts the simulation of the dynamic processes of microbial interactions and the algorithm complexity,there are few re-searches on simulation algorithms of polymicrobial metabolic ***,this review also analyzed and combed the microbial interactions based on the commonly used hypothesis of maximizing growth rates,and studied the strategies of coupling interactions with optimal planning simulations for ***,this review provided new insights into the genomic scale metabolic flux simulations of polymicrobial systems.

关键词： Optimal planning algorithm Metabolic flux simulation Microbial system Interaction

来源：评论

学校读者我要写书评

暂无评论

Design of a new low power protection method for pumped storage synchronous motor 9

Design of a new low power protection method for pumped stora...

引用

9th International Conference on Energy Materials and Electrical engineering, ICEMEE 2023

作者： Qiao, Jian He, Rufei Yin, Xianggen Ma, Yiming Lu, Qinghui Peng, Yumin Wang, Wenhui Zhang, Hao State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China CSG PGC Power Storage Research Institute Guangzhou510950 China

ISBN: (纸本)9781510672765

In this paper, the characteristics of power oscillation of pumped storage synchronous motor under pumped condition are studied, and the causes of misoperation of conventional low power protection are analyzed. Based on digital simulation and actual data analysis, a multi-stage low power protection is proposed. The power setting value of each section matches the delay setting value, which can adapt to the characteristics of motor power oscillation and effectively solve the misoperation problem of conventional low power protection. The simulation results show that its performance is stable and reliable, and the problem of misoperation of conventional low power protection is solved. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Failure analysis engineering Silver Analytical research Design and modelling Reliability Frequency modulation Phase modulation Safety Power grids

来源：评论

学校读者我要写书评

暂无评论

Design Strategies for Aqueous Zinc Metal Batteries with High Zinc Utilization: From Metal Anodes to Anode-Free Structures

引用

Nano-Micro Letters 2024年第4期16卷 305-349页

作者： Xianfu Zhang Long Zhang Xinyuan Jia Wen Song Yongchang Liu School of Materials Science and Engineering University of Science and Technology Beijing30 College RoadBeijing 100083People’s Republic of China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyState Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China

Aqueous zinc metal batteries(AZMBs)are promising candidates for next-generation energy storage due to the excellent safety, environmental friendliness, natural abundance, high theoretical specific capacity, and low redox potential of zinc(Zn) metal. However,several issues such as dendrite formation, hydrogen evolution, corrosion, and passivation of Zn metal anodes cause irreversible loss of the active materials. To solve these issues, researchers often use large amounts of excess Zn to ensure a continuous supply of active materials for Zn anodes. This leads to the ultralow utilization of Zn anodes and squanders the high energy density of AZMBs. Herein, the design strategies for AZMBs with high Zn utilization are discussed in depth, from utilizing thinner Zn foils to constructing anode-free structures with theoretical Zn utilization of 100%, which provides comprehensive guidelines for further research. Representative methods for calculating the depth of discharge of Zn anodes with different structures are first summarized. The reasonable modification strategies of Zn foil anodes, current collectors with pre-deposited Zn, and anode-free aqueous Zn metal batteries(AF-AZMBs) to improve Zn utilization are then detailed. In particular, the working mechanism of AF-AZMBs is systematically introduced. Finally, the challenges and perspectives for constructing high-utilization Zn anodes are presented.

关键词： Aqueous zinc metal batteries Zinc anodes High zinc utilization Depth of discharge Anode-free structures

来源：评论

学校读者我要写书评

暂无评论

Research on bundling optimization of wind-solar-hydro based on wind-solar cluster convergence

Research on bundling optimization of wind-solar-hydro based ...

引用

2024 International Conference on Smart Grid and Artificial Intelligence, SGAI 2024

作者： Zhao, Yuanyuan Wu, Yaowu Yao, Xun Lou, Suhua Yang, Xiaojuan Liu, Peiyu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Hubei Wuhan430070 China State Grid Gansu Electric Power Company Gansu Lanzhou730000 China

To solve the problem of cooperative dispatching of wind-solar power stations and cascade hydropower stations along the coast of the basin, an optimization method of bundling of wind-solar-hydro (WSH) in the basin based on the convergence of wind-solar (WS) clusters is proposed. This method takes into account the spatial distribution characteristics and output characteristics of WS-power stations in the basin and constructs the cluster division strategy based on the geographical location distribution peculiarity of power stations and the cluster convergence criterion based on the complementary properties of wind and solar. To optimize the load-matching characteristics of the output of the WSH system, based on the hydraulic coupling characteristics of upstream and downstream cascade hydropower stations, an optimization model of cascade wind-solar-hydro bundling is constructed. Taking the data of wind, solar, and hydro stations in a river basin as an example, the results show that the method proposed in this paper is suitable for solving the problem of gradual bundling of wind-solar-hydro in the basin. © Published under licence by IOP Publishing Ltd.

关键词： Electric power distribution

来源：评论

学校读者我要写书评

暂无评论

Simulation of Disruption Plasma Parameters for the Confinement Ability of Runaway Electrons

Simulation of Disruption Plasma Parameters for the Confineme...

引用

2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Jiang, Xiping Jiang, Zhonghe Yang, Junhui Wang, Haocheng Huazhong University of Science and Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Technology Wuhan China

ISBN: (纸本)9798331530174

The presence of runaway electrons during the dis-ruption evolves into a runaway current, which carries a large amount of energy and will cause irreversible damage to the toka-mak device in case of an impact on the device wall, and thus re-quires attention. It is found that the plasma parameters before plasma disruption, such as the boundary safety factor, the mag-nitude of the toroidal magnetic field, and the electron density, af-fect the formation of the runaway current during the experiment, which can also be interpreted as affecting the confinement of the runaway electron seeds during thermal quench, but there is no relevant numerical simulation study yet. In this qaper, the exper-imental results are reproduced qualitatively using the NIMROD simulation code, and the runaway electron confinement during thermal quench is investigated using a test particle model. Dif-ferent parameters are found to affect the runaway electron con-finement in their respective ways. © 2024 IEEE.

关键词： Tokamak devices

来源：评论

学校读者我要写书评

暂无评论

Analysis of a TE11 to HE11 Mode Converter for a Ka-Band Corrugated Horn 6

Analysis of a TE11 to HE11 Mode Converter for a Ka-Band Corr...

引用

6th International Conference on Electronics and Communication, Network and Computer technology, ECNCT 2024

作者： Li, Jingtao Xia, Donghui Geng, Wentao Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics Wuhan China

ISBN: (纸本)9798350366143

The hybrid modes transmitted in corrugated horns have broad prospects for applications in the high-power millimeter-wave field. In this paper, we investigated the design process of corrugated horns and designed a horn suitable for the Ka-band. We simulated and analyzed the corrugated horn based on the finite integration technique, focusing on the influence of factors such as the number of periods, spread angle, and corrugated-surface profile on mode purity. The results show that increasing the number of periods and decreasing the spread angle are key factors for improving mode conversion efficiency. Additionally, it is important to choose a suitable corrugated-surface profile according to practical needs. © 2024 IEEE.

关键词： Conversion efficiency

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：