Journal of Electrical Engineering & Technology最新文献_第3页

Brain Magnetic Resonance Image Inpainting via Deep Edge Region-based Generative Adversarial Network 通过基于边缘区域的深度生成对抗网络绘制脑磁共振图像

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-29 DOI: 10.1007/s42835-024-02025-0

R. Kala, Raja Chandrasekaran, A. Ahilan, P. Jayapriya

{"title":"Brain Magnetic Resonance Image Inpainting via Deep Edge Region-based Generative Adversarial Network","authors":"R. Kala, Raja Chandrasekaran, A. Ahilan, P. Jayapriya","doi":"10.1007/s42835-024-02025-0","DOIUrl":"https://doi.org/10.1007/s42835-024-02025-0","url":null,"abstract":"Human brains are the most complex organs. There are a number of functions that this three-pound organ performs, including intelligence, interpreter of the senses, initiator of bodily movements, and controller of behaviour. In this paper, a novel ER-GAN model has been proposed for image inpainting (IIP) Brain MRI images. Initially, the brain MRI images are segmented using Attention V-Net. In the first GAN, Edge reconstruction Generative Adversarial Networks (EGAN) are used as edge generators able to hallucinate edges in missing regions based on the rest of the image’s edges and grayscale pixel intensities. Edge generation in brain MRI images involves leveraging these grayscale pixel intensities to detect boundaries between different brain tissues or structures. The varying intensities in MRI images often correspond to changes in tissue composition or boundaries between anatomical regions, making them valuable for edge detection and delineation. The second GAN uses the Region Reconstruction Generative Adversarial Network (RGAN) to fill in the missing regions by combining edge information from the missing regions and color and texture information from the surrounding regions. In experimental analysis, the Jaccard Index (JI) and Dice Index (DI) are obtained at 0.78 and 0.84 respectively. The proposed ER-GAN model reaches an overall accuracy of 99.25%, which is comparatively better than the existing techniques.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on DC Component Suppression Method of Non-isolated Grid-Connected Inverter 非隔离并网逆变器直流分量抑制方法研究

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-29 DOI: 10.1007/s42835-024-01940-6

Huige Chen, Shuangling Wang

{"title":"Research on DC Component Suppression Method of Non-isolated Grid-Connected Inverter","authors":"Huige Chen, Shuangling Wang","doi":"10.1007/s42835-024-01940-6","DOIUrl":"https://doi.org/10.1007/s42835-024-01940-6","url":null,"abstract":"The zero drift occurring to the sampling conditioning circuit of the non-isolated grid-connected inverter will make the output develop a DC component, thus resulting in system failure and posing safety risks. According to the IEEE standard 1547-2003, the DC component injected into the grid side should be less than 0.5% of the rated current. In this paper, a moving average filter is proposed to extract the DC component of the three-phase AC output current. The filter has a very strong attenuation ability to the fundamental integer multiple harmonics, and can accurately extract the DC component. Then the proportional integral resonant controller (PIR) is used to control the system. The control system has sufficient bandwidth to avoid the stability problem caused by frequency offset. Through the above methods, the purpose of accurately suppressing the DC component in the non-isolated grid-connected inverter is realized. Also, a 50 kVA prototype is built in this study. The experimental results show that the moving average filter is advantageous over the conventional low-pass filter method in extracting the DC component, and the PIR controller used in the closed-loop control system outperforms the proportional integral and proportional resonant controllers. Under the strategy proposed in this study, the DC component is reduced to less than 0.5% of the rated current, and the THD of the grid-connected current falls below 5%.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Probe Contact Resistance, Thermoelectric Voltage and Time Dependence on Electrical Resistance Measurement of Superalloy Single-Crystal Steel by Four-Point Probe 探头接触电阻、热电电压和时间对四点探头测量超合金单晶钢电阻的影响

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-26 DOI: 10.1007/s42835-024-02012-5

Sang Hwa Lee, Kwang Min Yu, Jeon Hong Kang, Seung Hoon Nahm, Jae Yeong Park

{"title":"Effect of Probe Contact Resistance, Thermoelectric Voltage and Time Dependence on Electrical Resistance Measurement of Superalloy Single-Crystal Steel by Four-Point Probe","authors":"Sang Hwa Lee, Kwang Min Yu, Jeon Hong Kang, Seung Hoon Nahm, Jae Yeong Park","doi":"10.1007/s42835-024-02012-5","DOIUrl":"https://doi.org/10.1007/s42835-024-02012-5","url":null,"abstract":"The effects of probe contact resistance, thermoelectric voltage and time dependence on electrical resistance measurement of superalloy single-crystal steel were examined as important error factors in determining the electrical conductivity of the sample using the four-point probe (FPP) method. It was shown that even when the contact resistance and its time dependence are large, its effect on the sample resistance measurement results is insignificant. Additionally, it was found that the thermoelectric voltage effect can cause a measurement error of several percent, and to cancel this effect, the voltage due to both polarities of the applied current must be averaged. In addition, it was found that in the first few minutes, the measured voltage values change rapidly within the first few minutes and may cause an error of several percent; to obtain accuracy and an uncertainty of about 0.1%, the measurements must be performed after voltage stabilization. The results indicated that to determine sample resistance accurately using the FPP method, the effects examined above must be considered in addition to the basic parameters of current, voltage, and geometric correction factor mentioned in literature (Kang et al. in J Electr Eng Technol 18:1419–1427, 2023).","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of 2D and 3D Rotor Eccentricity on End Winding Mechanics Behavior in Synchronous Generators 二维和三维转子偏心率对同步发电机端部绕组力学行为的影响

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-21 DOI: 10.1007/s42835-024-01997-3

Ming-Xing Xu, Yu-Ling He, Wen Zhang, Wen-Jie Zheng, De-Rui Dai, Xiang-Ao Liu, David Gerada

{"title":"Impact of 2D and 3D Rotor Eccentricity on End Winding Mechanics Behavior in Synchronous Generators","authors":"Ming-Xing Xu, Yu-Ling He, Wen Zhang, Wen-Jie Zheng, De-Rui Dai, Xiang-Ao Liu, David Gerada","doi":"10.1007/s42835-024-01997-3","DOIUrl":"https://doi.org/10.1007/s42835-024-01997-3","url":null,"abstract":"Investigations on static air-gap eccentricity (SAGE) faults about magnetic field variations, current/ voltage changes, and stator/ rotor vibrations have been widely carried out, while the mechanical properties of the end windings have been rarely studied, especially in 3D eccentricity cases. This article provides a detailed study on the stator end winding mechanics behavior in synchronous generators at typical rotor eccentricity running conditions. Such mechanics behavior includes not only the electromagnetic force (EF) properties, but also the end winding vibrations as well as the stress/strain/deformation responses due to the uneven EF excitation. The typical rotor eccentricity running conditions include: 1) radial static air-gap eccentricity (RSAGE), 2) axial static air-gap eccentricity (ASAGE), and 3) hybrid static air-gap eccentricity (HSAGE). The theoretical analysis, finite element analysis calculation and experimental verification are performed respectively, by taking a 5kVA synchronous generator as the research object in this paper. It is shown that in normal and SAGE cases, the end winding EF/vibration contains the DC component and even harmonics, especially the 2nd harmonic. RSAGE increases the end winding EF/vibration, whereas ASAGE increases the end winding EF/vibration at the extended end of the rotor while decreasing the EF/vibration on the retracted end. Under HSAGE, both RSAGE and ASAGE will affect the variation trend of end winding EF/vibration with the rule of single direction SAGE fault. The nose part and the joint to connect the end part and the linear sections are the most dangerous positions to afford the mechanics responses, and the occurrence of SAGE will make these parts more vulnerable.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Classifying Radiation Degradation of Epoxy Molding Compound by Using Machine Learning and its Effect on Thermal and Mechanical Properties 利用机器学习对环氧树脂模塑料的辐射降解及其对热性能和机械性能的影响进行分类

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-21 DOI: 10.1007/s42835-024-01986-6

Dong-Hyeon Kim, Dong-Seok Kim, Sung-Uk Zhang

{"title":"Classifying Radiation Degradation of Epoxy Molding Compound by Using Machine Learning and its Effect on Thermal and Mechanical Properties","authors":"Dong-Hyeon Kim, Dong-Seok Kim, Sung-Uk Zhang","doi":"10.1007/s42835-024-01986-6","DOIUrl":"https://doi.org/10.1007/s42835-024-01986-6","url":null,"abstract":"Power semiconductors play a crucial role in power conversion applications within nuclear power plants. These semiconductors are enclosed using polymeric materials for cost-effectiveness. Researchers have substantiated that polymeric materials are subject to radiation-induced degradation in nuclear power plants, prompting reliability studies. Consequently, investigating the radiation degradation behavior of polymeric materials becomes imperative to ensure their reliability and stability. This study focuses on the degradation of epoxy molding compound (EMC), a type of polymeric material, under the influence of total ionizing dose (TID). To analyze the effects of TID conditions on EMC, data was collected and subjected to various tests, including FTIR (Fourier Transform Infrared Spectroscopy) spectroscopy, thermal conductivity testing, and nanoindentation testing. These tests were conducted to assess chemical changes, thermal properties, and mechanical properties of EMC as a consequence of TID exposure. TID induces random ionization damage of EMC. Five EMC samples with different total cumulative doses were produced by varying the TID exposure time. Spectral data were obtained from the fabricated EMC samples by FTIR spectroscopy. FTIR spectral data was used to build a machine learning model, and the degree of EMC performance degradation due to TID exposure was determined. In our study, we selected an optimal algorithm among six machine learning algorithms. Dimensionality reduction methods such as ReliefF and PCA were also applied to build a more simplified discriminant model. As a result, it was confirmed that radiation changed the thermal properties of EMC materials. However, no change in the mechanical properties of EMC was observed under our test conditions.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical Performance Verification Study of Underground Structures Including Electrical Distribution Equipment 包括配电设备在内的地下建筑电气性能验证研究

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-21 DOI: 10.1007/s42835-024-01992-8

Boo-Hyun Shin, Hye-Seon Lee, Gi-Dae Oh, Seung-Chul Kim

引用次数: 0

Fault Diagnosis of the Electric Multiple Unit Door System by Machine Learning Using Sensor Signal of the Simulator 利用模拟器的传感器信号，通过机器学习对电动多单元门系统进行故障诊断

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-21 DOI: 10.1007/s42835-024-02003-6

Gil Hyun Kang, Kyung Sik Kim, Chin Young Chang, Chul Su Kim

{"title":"Fault Diagnosis of the Electric Multiple Unit Door System by Machine Learning Using Sensor Signal of the Simulator","authors":"Gil Hyun Kang, Kyung Sik Kim, Chin Young Chang, Chul Su Kim","doi":"10.1007/s42835-024-02003-6","DOIUrl":"https://doi.org/10.1007/s42835-024-02003-6","url":null,"abstract":"Fault diagnosis and prediction are important to prevent traffic congestion during rush hour due to door failures of urban railway vehicles. This paper is a study on improving failure classification performance through machine learning using the data set collected by installing a displacement sensor on a door simulator. First, the durability test of the sensor and the developed simulator was verified through 147,000 no-failure tests. For machine learning, 11,225 sets of normal and abnormal data of the door were collected and supervised learning was performed. In order to overcome the difficulty of fault diagnosis of the existing pressure sensor or acoustic sensor, pre-processing was performed that converted to speed-based data. In addition, feature extraction was compared with the single zone method by testing the 2-zone segmentation method. Feature selection was made using the principal component analysis algorithm developed for feature dimensionality reduction. As a result, the classification performance of the method using the single zone method with open and close data was better than the 2-zone segmentation method by acceleration and deceleration. Among the machine learning models, the LGBM model showed the highest prediction accuracy of 99.55%, which is expected to be applied to actual vehicles.<h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust Operation of Four-Leg Voltage Source Inverter Using Model-Free Predictive Control 使用无模型预测控制的四脚电压源逆变器稳健运行

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-20 DOI: 10.1007/s42835-024-02018-z

Abualkasim Bakeer, Abderahmane Abid, Hani A. Albalawi, Gaber Magdy, Andrii Chub, Sherif A. Zaid

{"title":"Robust Operation of Four-Leg Voltage Source Inverter Using Model-Free Predictive Control","authors":"Abualkasim Bakeer, Abderahmane Abid, Hani A. Albalawi, Gaber Magdy, Andrii Chub, Sherif A. Zaid","doi":"10.1007/s42835-024-02018-z","DOIUrl":"https://doi.org/10.1007/s42835-024-02018-z","url":null,"abstract":"This paper presents a novel model-free predictive control (MFPC) approach for precise voltage control in four-leg voltage-source inverters (4L-VSI). MFPC eliminates the need for complex system models, unlike traditional model predictive control (MPC) methods. It leverages the ultra-local model for controlled variable estimation, enabling robust performance without prior model information. The core contribution lies in a comprehensive mathematical model for the proposed MFPC strategy, encompassing all possible 4L-VSI switching states. This is contrasted with a detailed analysis of conventional MPC limitations for 4L-VSI control. Simulation results validate the effectiveness of MFPC in achieving accurate voltage control without explicit modeling. Furthermore, MFPC demonstrates superior robustness against parameter variations and model mismatches compared to conventional MPC. Hardware-in-the-loop testing with the RT-BOX platform strengthens the theoretical analysis. The achieved total harmonic distortion of 1.86% confirms compliance with IEEE standards, showcasing the practical effectiveness of the proposed MFPC approach.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Novel Model Predictive Current Control for Fault Tolerant Permanent Magnet Vernier Rim-Driven Motor Based on Improved Sector Selection 基于改进扇区选择的新型容错永磁游标轮缘驱动电机模型预测电流控制装置

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-19 DOI: 10.1007/s42835-024-02020-5

Mingxuan Li, Jingwei Zhu, Qing Liu, Haibo Liao, Kun Zang

{"title":"A Novel Model Predictive Current Control for Fault Tolerant Permanent Magnet Vernier Rim-Driven Motor Based on Improved Sector Selection","authors":"Mingxuan Li, Jingwei Zhu, Qing Liu, Haibo Liao, Kun Zang","doi":"10.1007/s42835-024-02020-5","DOIUrl":"https://doi.org/10.1007/s42835-024-02020-5","url":null,"abstract":"Fault tolerant permanent magnet vernier rim-driven motor (FTPMV-RDM) have a broad application prospect in ship electric propulsion systems due to its high torque density and strong fault-tolerant capability. In order to solve the problem of large number of alternating voltage vectors and complicated calculation process, in the paper, a novel model predictive current control algorithm based on improved sector selection (ISS-MPCC) for FTPMV-RDM is proposed to suppress torque ripple and reduce current harmonic content. Firstly, a set of fundamental voltage vectors is used for initial screening. Then, a secondary screening is performed using a value function to determine the pre-selected voltage vector, thus reducing the number of voltage vector enumerations in the system and effectively suppressing the generation of harmonic currents. Finally, optimization is carried out within this sector to obtain an optimal combination of switching states for one control cycle. To obtain good performance under single-phase open-circuit fault condition, a fault-tolerant control strategy based on the healthy decoupling transformation matrix is proposed. This strategy simplifies the fault-tolerant control by only requiring changes in the reference currents in the harmonic subspace. Hardware experimental results have validated the effectiveness of the proposed control strategy in this paper.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Comparison of Glazed and Unglazed Hybrid Solar Modules Considering Power Productivity and Cell Temperature 考虑到功率生产率和电池温度的有釉和无釉混合太阳能电池组件的实验比较

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-19 DOI: 10.1007/s42835-024-01996-4

Ahssan M.A. Alshibil, István Farkas, Piroska Víg

引用次数: 0