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Nine-Level Multilevel Inverter with Low Switching Count and Voltage Stress for Solar Photovoltaic Application 3

Nine-Level Multilevel Inverter with Low Switching Count and ...

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3rd ieee International conference on Sustainable Energy and Future Electric Transportation, SeFet 2023

作者： Ahmad, Shahbaz Tariq, Mohd Verma, Vimlesh Aligarh Muslim University Zhcet Department of Electrical Engineering Aligarh202002 India National Institute of Technology Department of Electrical Engineering Bihar Patna800005 India

ISBN: (纸本)9798350319972

MLIs, or multilevel inverters, are increasingly a crucial component for medium-voltage, high-power applications. Because to its high efficiency, low cost, and simplicity of control for an output with a greater number of levels, MLIs with fewer switches are more often used. In order to provide a 9-level output voltage, an improved multilevel inverter topology with two DC sources and fewer switches is shown in this work. Studies comparing the proposed MLI structure to recently suggested MLIs demonstrate its significance in terms of decreased switch count and lower voltage stresses across switches in these symmetrical designs. Seven switches, including one bidirectional switch, are employed in this configuration. Comparing the suggested topology to existing series and topologies reveals that it has fewer devices and an excellent efficiency of about 98.5%. Further generalized for n-level output voltages is the proposal topology. The suggested topology has been operationally and functionally simulated using PLECS and MATLAB (SIMULINK) software, and its experimental validation is also being carried out on the setup. applications for the suggested topology include grid-connected systems, motor drives, and renewable energy systems. © 2023 ieee.

关键词： Topology

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Design Analysis of LLC Resonant Converter with ZVS Implementation

Design Analysis of LLC Resonant Converter with ZVS Implement...

引用

2023 ieee Renewable Energy and Sustainable E-Mobility conference, RESEM 2023

作者： Kumar, Subhash Kumar, Amit National Institute of Technology Kurukshetra Electrical Engineering Department Haryana India

ISBN: (纸本)9798350311327

The LLC resonant converter, in which the driving frequency regulates the output voltage is one of the most often used switching Dc-Dc converters. The LLC resonant converter is popular among all power converters used in numerous applications, such as computer power supply, LED lighting, and electric vehicles. It is an attractive alternative due to its high-power density, low EMI, and excellent efficiency. The converter uses a resonant circuit with a transformer, capacitor, and inductor as its main components. Due to the converter resonant circuit's ability to operate at high frequencies, its component is smaller and lighter. Moreover, soft switching techniques are used in LLC resonant converters to reduce switching loss and increase efficiency. The construction of an LLC resonant converter, which consists of a half-bridge inverter, a resonant circuit with two inductors, a capacitor, and a rectifier circuit is explained in detail in this article. The resonant capacitor is initially charged with a DC input voltage before the converter can function. The transformer and inductor work together to transmit energy to the output load after that moreover resonant capacitor and transformer control voltage by adjusting their resonant frequencies to match the output voltage, they are well suited for use in a number of applications. They are a popular choice for power conversion in many industries due to their excellent efficiency, dependability, and EMI performance. © 2023 ieee.

关键词： Resonant circuits

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Traceability and Prevention System Construction of Network Attacks Driven by Big Data

Traceability and Prevention System Construction of Network A...

引用

2023 ieee International conference on Paradigm Shift in Information Technologies with Innovative applications in Global Scenario, ICPSITIAGS 2023

作者： Liu, Benfa School of Computer and Information Engineering Wuhan Railway Vocational College of Technology Wuhan Hubei430205 China

ISBN: (纸本)9798350329773

The traditional mode of defending against DDoS attacks forms a distributed and strongly coupled system by integrating data processing and control logic into network devices. This system structure can improve the reliability of network operation, but it also has some problems, such as overburdened managers, unable to achieve global unified scheduling and consuming huge resources. In this paper, typical network attacks such as SQL(Structured Query Language) and DDOS (Distributed Denial of Service) are taken as research objects, and the characteristics of these two types of attacks in the context of big data are modeled. The packet is tested by NS2 simulation software, and the results show that BP(Backpropagation) algorithm is used to improve the probabilistic packet marking method, which can effectively improve the convergence speed of the tracking algorithm and improve the tracking accuracy. In view of the large number and high complexity of attack sources in big data environment, it is difficult to solve them by traditional methods based on experience or theory. This paper intends to improve the existing traceability methods by using the adaptability and self-learning ability of BP network. When the number of attack sources is 60, the false alarm rate of the traditional packet marking algorithm is 0.34, and the false alarm rate of the improved probabilistic packet marking algorithm is 0.20. © 2023 ieee.

关键词： Big data

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Exploring Age-Related Changes in Bioimpedance across Diverse Biological Samples

Exploring Age-Related Changes in Bioimpedance across Diverse...

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2024 International conference on Innovations in Science, Engineering and technology, ICISET 2024

作者： Abdullah, Md. Tushar Roy, Chitra Imran, Md. Ibrahim Al University of Dhaka Dept. of Biomedical Physics & Technology Dhaka Bangladesh

ISBN: (纸本)9798350355499

technology based on bioimpedance has proven itself very useful in a wide range of applications, particularly within the realm of tissue characterization. Notably, it has found significant utility in categorizing various food types, such as meats, fruits, and beverages. As biological samples, such as chicken, fruits, and vegetables, lose freshness after preservation, their internal structures transform due to distinct biological reactions, resulting in alterations to their internal properties and bonds. Consequently, the electrical properties of the tissues change. In this study, the effect of aging on different biological samples after preservation in a refrigerator was investigated over a wide range of frequencies. Freshly excised animal tissue (chicken) and vegetables (gourd, papaya, brinjal) were considered biological samples. The transfer impedance values were measured over the frequency range of 100 Hz to 100 kHz using an impedance spectrometer placing four electrodes on the samples. The findings revealed a consistent decrease in the electrical impedance of biological samples over time across all measured frequencies. The observed impedance changes exhibited a Gaussian decay curve, offering a reliable means to monitor the freshness of the samples. This technique demonstrates significant potential for enhancing the quality control of perishable foods. © 2024 ieee.

关键词： Bioimpedance Fim Food Freshness Food Preservation Tissue Characterization

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EV Charging Load Forecasting Method Considering Time-of-Use Price and Meteorological Factors 7

EV Charging Load Forecasting Method Considering Time-of-Use ...

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7th International conference on Power and Energy applications, ICPEA 2024

作者： Li, Guangxiao Yang, Yilu Wang, Chunyi Xu, Ziyu Wang, Yue Liu, Yutian State Grid Jining Power Supply Company Development Planning Department Jining China State Grid Shandong Electric Power Company Development Planning Department Jinan China Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

ISBN: (纸本)9798350356113

The randomness of load fluctuations at electric vehicle (EV) charging stations presents a significant challenge for the accurate load forecasting. Considering time-of-use (TOU) price and meteorological factors, EV charging load forecasting method for EV charging station is proposed. First, the factors affecting charging load are analyzed using the Pearson correlation coefficient and the maximum information coefficient (MIC). Key factors such as TOU price, temperature, weekday type, and recent historical load data are determined. Next, convolutional neural network (CNN) is used to extract important features and capture complex nonlinear relationships from key factors. Finally, the extracted features are processed by gated recurrent unit (GRU) network to forecast charging load at different time scales. Case study is conducted using load data from EV charging station with a capacity of 1800 kW. The results demonstrate that the CNN-GRU model significantly improves forecasting accuracy at 4h, 24h, 72h, and 168h forecasting lengths compared to other models. © 2024 ieee.

关键词： Charging stations

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The Practice of Using a SoftPLC to control the Electromechanical Units of a Training Turning Machine

The Practice of Using a SoftPLC to Control the Electromechan...

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2023 International conference on Industrial Engineering, applications and Manufacturing, ICIEAM 2023

作者： Martinov, Georgi Nikishechkin, Petr A. Moscow State University of Technology Stankin Department of Computer-Architecture Control Systems Moscow Russia

ISBN: (纸本)9781665475952

The process of developing a PLC program for controlling the electromechanical units of modern machine tools with computer numerical control (CNC) has been formalized. The architecture of a two-computer CNC system with an integrated SoftPLC is given and the specifics of using the touch operator panel and virtual machine panel are considered. A set of libraries developed in the FBD (Functional Block Diagram) language for controlling the electrical automation units of a turning machine is proposed. An example of controlling the electric automation of a training lathe via the high-speed EtherCAT field bus using relatively inexpensive third-party solutions for servo drives and I/O modules that provide the required accuracy and speed is given. © 2023 ieee.

关键词： Lathes

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Concepts and challenges in the design of a tokamak plasma control system. ITER PCS for First Plasma and beyond

Concepts and challenges in the design of a tokamak plasma co...

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ieee conference on control technology and applications (CCTA)

作者： Zabeo, L. de Vries, P. C. Snipes, J. A. Ravensbergen, T. Gribov, Y. Raupp, G. Treutterer, W. Pironti, A. de Tommasi, G. Cinque, M. Mattei, M. Humphreys, D. Walker, M. Rimini, F. Moreau, P. Nouailletas, R. ITER Org F-13067 St Paul Les Durance France EURATOM Max Planck Inst Plasma Phys Garching Germany Univ Napoli Federico II CREATE Naples Italy Gen Atom San Diego San Diego CA USA Culham Ctr Fusion Energy Culham Sci Ctr Abingdon Oxon England CEA IRFM St Paul Les Durance France

ISBN: (数字)9781665473385

ISBN: (纸本)9781665473385

Electricity production through the control of nuclear fusion reactions is a promising option to meet the increasing demand for clean energy sources. The magnetically confined approach based on the tokamak is presently investigated through the international ITER project. ITER is the largest fusion development project aimed at demonstrating the capability of generating 500MW of fusion power with an input of 50MW (Q=10) for long durations (> 5 min) by controlling fusion reactions. The project requires a multidisciplinary development approach from materials to cooling system and, of course, control. The high temperature plasmas generated in a tokamak require continuous control to guarantee the achievement and sustainment of the required performance to demonstrate a high fusion energy gain. This requires an integrated set of controls with multiple inputs and multiple outputs, sharing the available actuators supported by an effective system to avoid, where possible, conditions that could ultimately, compromise the integrity of the device. This role is in the scope of the Plasma control System (PCS). A lot of experience has been already gained from present fusion devices, but the scale of ITER and future reactors requires further developments in the field. The control in ITER is similar to other devices, but more complexity is required by the new physics to be explored in ITER scenarios, the robustness against larger loads (e.g. high neutron flux rate) and the systematic application of multiple controls sharing resources or by narrow operational spaces/proximity to instability boundaries associated with high Q operation. Moreover, the design of the PCS requires a model-based approach, considering that the machine for which it is designed is under construction. On the other hand, while the control schemes will be validated through simulations ahead of operation, the PCS will only be fully tested and commissioned through ITER operation itself. In this paper, an overview of a

关键词： Performance evaluation Systematics Production Fusion reactors Tokamak devices Robustness Plasmas

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A Registration and Fusion Method of 3D Cross-source Point Cloud Data for Modeling Accurate Models of Small Celestial Bodies

A Registration and Fusion Method of 3D Cross-source Point Cl...

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2024 ieee International conference on Robotics and Biomimetics, ROBIO 2024

作者： He, Xuan Zhao, Qingjie Lv, Xingchen Wang, Lei Liu, Wangwang School of Computer Science and Technology Beijing Institute of Technology Beijing100081 China Beijing Institute of Control Engineering Beijing100190 China

ISBN: (纸本)9781665481090

High-precision three-dimensional models of small celestial bodies are important for deep space exploration tasks. The homologous point cloud obtained from a single sensor has limitations in terms of accuracy and density. For example, the point cloud obtained by RGB camera has rich information and high density, but low precision. The point cloud obtained by laser scanning has high precision but low density. Therefore, we hope to register and fuse the point clouds obtained from different sensors, synthesize the advantages of cross-source point clouds obtained from different source domains, and improve the density, accuracy and other aspects of small celestial point clouds. To solve the common problems of cross-source point clouds, we adopt an end-to-end feature measurement point cloud registration framework, which does not need to search the corresponding points between two point clouds, and reduces the difficulty of processing cross-source point cloud data. Aiming at the problem that some stray points on the registered point cloud surface affect the accuracy of the point cloud, a point cloud fusion optimization method based on Euclidean distance is proposed. The stray points around the point cloud are removed to reduce the loss of normal points. The accuracy of point cloud is improved by the fusion after registration. Experiments show that the proposed method can effectively improve the density and accuracy of small celestial body models. © 2024 ieee.

关键词： Laser applications

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Transformation from 5G N/W to 6G N/W Through technology Inclusion 4

Transformation from 5G N/W to 6G N/W Through Technology Incl...

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4th ieee International conference on Advance Computing and Innovative Technologies in Engineering, ICACITE 2024

作者： Vaish, Rohit Earshia, V. Diana Jeba Paulin, M. Al-Jawahry, Hassan M. Maheshwari, B. Mohanraj, T. Ies College of Technology Department of Electronics & Communication Engineering M. P Bhopal India Chennai TamilNadu Avadi India Nehru Institute of Technology Department of Electronics and Communication Engineering Tamil Nadu T.M.Palayam India The Islamic University College of Technical Engineering Department of Computers Techniques Engineering Najaf Iraq Prince Shri Venkateshwara Padmavathy Engineering College Department of Electronics and Communication Engineering TN India Karpagam Academy of Higher Education Department of Computer Science Engineering TN Coimbatore India

ISBN: (纸本)9798350360165

For us, figuring out where we are or where our resources are has always been important. While technology has greatly benefited this quest, real-time interior locating remains a daunting problem, from conventional instruments like sextants to contemporary outside GPS devices. With the introduction of 5G mobile networks, network-based location became a practical option. With the help of sophisticated radio technologies, decreased end-to-end latency, specialist control protocols, and increased processing power at the network edge, 5G's full promise for indoor and outdoor placement could now be realized. This study provides a thorough introduction to network-based positioning, examining advanced machine-learning-supported solutions as well as underlying ideas. A detailed comparison of learning methods used in network-based positioning is a significant addition. The article provides a forward-looking strategy to positioning using these advanced networks, as we expect the progression to 6G networks. Various application examples from different sectors are offered to highlight the topic's practical ramifications, with a focus on industrial industry vehicular applications. The goal of the material is to be both insightful and educational, serving as a useful tool for comprehending and managing the rapidly changing field of location-based technology. © 2024 ieee.

关键词： 5G mobile communication systems

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Electromagnetic Performance and Vibration Analysis of a Special-shaped External-rotor Machine 18

Electromagnetic Performance and Vibration Analysis of a Spec...

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18th ieee conference on Industrial Electronics and applications, ICIEA 2023

作者： Dong, Ziwei Yan, Liang Lu, Zhang Beihang University School of Automation Science and Electrical Engineering Beijing100191 China Beihang University Science and Technology on Aircraft Control Laboratory Beijing100191 China Tianmushan Laboratory Xixi Octagon City Yuhang District Hangzhou310023 China Beihang University Ningbo Institute of Technology Ningbo315800 China Zhejiang University State Key Laboratory of Fluid Power and Mechatronic Systems Hangzhou China

ISBN: (纸本)9798350312201

Permanent magnet synchronous machines have advantages such as small size, light weight, high efficiency, etc. It is more and more widely used in robots, electromagnetic propulsion, electric vehicles and so on. High power density and high torque density are urgent need for those applications. The electromagnetic design of machines mostly adopt multi-pole magnet patterns to reduce the stator yoke size. It helps to decrease the mass of the machine with the same power and improve the torque density. As the number of poles grows larger, the frequency and the core loss of per unit volume will also increase with the same speed, which can aggravate the heat problem of the machine. It is easy to generate the low-order vibration with high flux density. Therefore, the performance of a special-shaped external-rotor machine and comparisons with the traditional machine are analyzed in this paper. Numerical simulation is conduced to validated that the special-shaped magnet pattern can reduce the torque ripple, improve the torque output and power density. From the two-dimensional Fourier analysis of the radial electromagnetic force, it is found that the low-order amplitude of the special-shaped machine is greatly reduced, so the vibration can be avoided. Subsequently, the vibration simulation is carried out to indicate that the magnet pattern can satisfy low level in vibration and noise of the machine. © 2023 ieee.

关键词： Vibration analysis

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