Chinese Journal of Electrical Engineering最新文献_第10页

Magnets Shifting Design of Dual PM Excited Vernier Machine for High-torque Application 大转矩双永磁励磁游标机磁体移位设计

Chinese Journal of Electrical Engineering Pub Date : 2022-09-01 DOI: 10.23919/CJEE.2022.000028

Feilong Yan;Jinghua Ji;Zhijian Ling;Yuhua Sun;Wenxiang Zhao

{"title":"Magnets Shifting Design of Dual PM Excited Vernier Machine for High-torque Application","authors":"Feilong Yan;Jinghua Ji;Zhijian Ling;Yuhua Sun;Wenxiang Zhao","doi":"10.23919/CJEE.2022.000028","DOIUrl":"10.23919/CJEE.2022.000028","url":null,"abstract":"In this study, a novel dual permanent magnet excited vernier machine (DPMEVM) with magnets shifting in stator is proposed. Compared with the conventional permanent magnet synchronous machine (PMSM), the DPMEVM based on the bidirectional field modulation effect can operate in a wider torque range. However, the torque ripple of a conventional DPMEVM is high because of the superposition of the torque generated by the stator-side and rotor-side PMs. Consequently, a novel DPMEVM with magnets shifting is proposed to further reduce the torque ripple. First, the topologies and working principles of the baseline machine and proposed machines are introduced. Second, the torque-contribution harmonics are analyzed and calculated using the Maxwell tensor method. The calculation results reveal that the DPMEVM, benefiting from multiple working harmonics, can offer an enhanced torque capability compared to the PMSM. In addition, the torque ripple characteristics of the proposed machines are analyzed. It is verified that the torque ripple can be significantly reduced through magnets shifting. Third, the performances of the baseline machine and proposed machines are analyzed and compared in terms of flux density, open-circuit back-EMF, and torque characteristics. In addition, the proposed principle can be extended to machines with the same unit motor. Finally, a 120s-110p prototype machine is manufactured for validation.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9915414/09915496.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47786073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Research and Modeling on the Characteristic Changes of EMI Filter Passive Components under the Influence of Aging EMI滤波器无源元件老化影响下特性变化的研究与建模

Chinese Journal of Electrical Engineering Pub Date : 2022-09-01 DOI: 10.23919/CJEE.2022.000021

Wenzhe Su;Hong Li;Zhichang Yang;Baihua Zhang

{"title":"Research and Modeling on the Characteristic Changes of EMI Filter Passive Components under the Influence of Aging","authors":"Wenzhe Su;Hong Li;Zhichang Yang;Baihua Zhang","doi":"10.23919/CJEE.2022.000021","DOIUrl":"10.23919/CJEE.2022.000021","url":null,"abstract":"At present, the power density of power electronic devices in data centers and electric vehicles is constantly increasing, and numerous electronic components are concentrated in a tight, high-temperature environment, which aggravates the performance degradation of electronic components. Consequently, X and Y capacitors, common-mode inductors, and differential-mode inductors used for electromagnetic interference (EMI) suppression suffer from aging effects, and their performance continues to decline. However, the electromagnetic compatibility test is often conducted immediately after the power electronic equipment leaves the factory. The electromagnetic compatibility of power electronic equipment is affected by aging, which is not assessed in current industrial testing. This study conducts aging experiments on passive electronic components in EMI filters and measures the impedance in the frequency range from 150 kHz to 30 MHz. Subsequently, a multi-element aging model based on electromagnetic field analysis is established. The proposed model is suitable for electromagnetic compatibility analysis considering aging. Finally, the aging performance of a commercial two-stage EMI filter is predicted to verify the model proposed in the study. The proposed model explains the degeneration of the EMI filter with aging in the frequency range of 150 kHz to 1 MHz, with a maximum amplitude error of 0.58 dB and phase error of 1.0°.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9915414/09915497.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44598167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Reduced Model of Droop-controlled Converters for Transient Simulation Analysis 用于瞬态仿真分析的降频控制变换器简化模型

Chinese Journal of Electrical Engineering Pub Date : 2022-09-01 DOI: 10.23919/CJEE.2022.000030

Yingjie Tan;Yang Shen;Min Xu;Chao Shen;Jinyong Lei

{"title":"Reduced Model of Droop-controlled Converters for Transient Simulation Analysis","authors":"Yingjie Tan;Yang Shen;Min Xu;Chao Shen;Jinyong Lei","doi":"10.23919/CJEE.2022.000030","DOIUrl":"10.23919/CJEE.2022.000030","url":null,"abstract":"In recent years, the transient stability problems encountered by power grids have increasingly attracted interest due to the connection of renewable energy resources. One of the effective methods for studying the transient characteristics of a system is transient simulation analysis. To reduce the simulation time, especially in a system with numerous renewable energy resources, model reduction has been widely employed. However, when a general reduced model is adopted to analyze different transient characteristics, a tradeoff between accuracy and simulation speed emerges. In this study, reduced model selection is implemented to resolve this problem. Considering the droop-controlled converter as an example, this approach allows the transient simulation analysis of voltage, frequency, and power angle characteristics. First, a full-order model of the droop-controlled inverter is formulated. Thereafter, the singular perturbation method is applied to derive different reduced-order models. Then, considering accuracy and simulation speed simultaneously, the most suitable reduced models for transient angle, voltage, and frequency simulation analyses are determined through time-domain simulation comparison. Finally, the simulation results based on Matlab/Simulink are used to verify the correctness of the reduced model selection.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9915414/09915505.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46091525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved Optimal Duty Model Predictive Current Control Strategy for PMSM PMSM最优占空比模型预测电流控制策略的改进

Chinese Journal of Electrical Engineering Pub Date : 2022-09-01 DOI: 10.23919/CJEE.2022.000032

Dingdou Wen;Jie Yuan;Yang Zhang;Chuandong Shi

引用次数: 5

Electric Field Distribution of Soluble Salt Deposition on the Surface of Insulators in Railway Overhead Lines 铁路架空线路绝缘子表面可溶性盐沉积的电场分布

Chinese Journal of Electrical Engineering Pub Date : 2022-09-01 DOI: 10.23919/CJEE.2022.000031

Sihua Wang;Junjun Wang;Long Chen;Lei Zhao

{"title":"Electric Field Distribution of Soluble Salt Deposition on the Surface of Insulators in Railway Overhead Lines","authors":"Sihua Wang;Junjun Wang;Long Chen;Lei Zhao","doi":"10.23919/CJEE.2022.000031","DOIUrl":"10.23919/CJEE.2022.000031","url":null,"abstract":"Different constituents of soluble salts have different effects on the insulation performance of insulators. To study the electric field distribution of soluble salt deposition on the surface of high-speed railway insulators, a two-dimensional model of the cantilever insulator electrostatic field and constant-current field with soluble salt deposition is constructed. The simulation results indicate that the relative dielectric constant of dry pollution is the main factor that affects the electric field distribution on the surface of the insulator. The electric field intensity is arranged in the following order: CaSO\u0000<inf>4</inf>\u0000>KNO\u0000<inf>3</inf>\u0000>NaNO\u0000<inf>3</inf>\u0000>K\u0000<inf>2</inf>\u0000SO\u0000<inf>4</inf>\u0000>NaCl>MgSO\u0000<inf>4</inf>\u0000, and the conductivity of each dirty liquid in the wet state becomes a key factor affecting the electric field distribution, which is specifically shown as sodium chloride>nitrate>sulfate. The simulation results are compared with existing test results to verify that they were correct. It is also found that the electric field intensity of the insulator with good hydrophobicity is slightly greater than that of the insulator without hydrophobicity. The results provide a theoretical basis for the classification of regional pollution levels and the testing of insulator contamination in the laboratory.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9915414/09915502.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42558329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Planar Magnetic Integrated Harmonic Filter with Reduced EMI Noise 降低EMI噪声的平面磁集成谐波滤波器

Chinese Journal of Electrical Engineering Pub Date : 2022-09-01 DOI: 10.23919/CJEE.2022.000025

Zijian Lu;Tianhao Chen;Yitao Liu

引用次数: 0

Impact of Motor Stator Winding Faults on Motor Differential-mode Impedance and Mode Transformation 电机定子绕组故障对电机差模阻抗和模变换的影响

Chinese Journal of Electrical Engineering Pub Date : 2022-09-01 DOI: 10.23919/CJEE.2022.000022

Fei Fan;Zhenyu Zhao;Huamin Jie;Quqin Sun;Pengfei Tu;Zhou Shu;Wensong Wang;Kye Yak See

{"title":"Impact of Motor Stator Winding Faults on Motor Differential-mode Impedance and Mode Transformation","authors":"Fei Fan;Zhenyu Zhao;Huamin Jie;Quqin Sun;Pengfei Tu;Zhou Shu;Wensong Wang;Kye Yak See","doi":"10.23919/CJEE.2022.000022","DOIUrl":"10.23919/CJEE.2022.000022","url":null,"abstract":"Motor impedance and mode transformation have significant effects on the electromagnetic interference (EMI) generated in motor drive systems. Stator winding faults commonly cause motor failure; however, in their early stages, they may not affect the short-term operation of the motor. To date, EMI noise under the influence of premature stator winding faults has not been adequately studied, particularly the differential-mode (DM) noise due to the common-mode (CM)-to-DM transformation. This study investigates and quantifies the influence of stator winding faults on the motor DM impedance and mode transformation. First, the transmission line model of an induction motor is described based on the scattering (S) parameter measurements of each phase of the motor. It offers the flexibility to emulate different types of stator winding faults at specific locations and various severities, such that the impacts of the faults on the motor DM impedance can be easily estimated. Second, a test setup is proposed to quantify the CM-to-DM transformation due to the stator winding faults. The findings of this study reveal that even the early stages of stator winding faults can result in significant changes in the DM noise.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9915414/09915503.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46130862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Health Status Assessment for New Urban Rail Vehicle Traction Systems Based on Cross Entropy and SVM 基于交叉熵和支持向量机的新型城市轨道车辆牵引系统健康状态评估

Chinese Journal of Electrical Engineering Pub Date : 2022-06-01 DOI: 10.23919/CJEE.2022.000019

Zhenglong Zhou;Yang Cheng;Shenggang Lv;Kai Chen;Weijing Du

引用次数: 1

Black-box Modeling of Converters in Renewable Energy Systems for EMC Assessment: Overview and Discussion of Available Models 用于电磁兼容评估的可再生能源系统变流器黑盒建模:综述与讨论

Chinese Journal of Electrical Engineering Pub Date : 2022-06-01 DOI: 10.23919/CJEE.2022.000011

Lu Wan;Abduselam H. Beshir;Xinglong Wu;Xiaokang Liu;Flavia Grassi;Giordano Spadacini;Sergio A. Pignari

{"title":"Black-box Modeling of Converters in Renewable Energy Systems for EMC Assessment: Overview and Discussion of Available Models","authors":"Lu Wan;Abduselam H. Beshir;Xinglong Wu;Xiaokang Liu;Flavia Grassi;Giordano Spadacini;Sergio A. Pignari","doi":"10.23919/CJEE.2022.000011","DOIUrl":"10.23919/CJEE.2022.000011","url":null,"abstract":"The development of renewable energy systems interfaced with the grid by power electronic converters leads to increasing issues of electromagnetic coexistence between power and communication lines, as well as severe power quality issues, such as total harmonic distortion at the consumer side. Therefore, high-frequency modeling of renewable energy systems is of great importance to guide the design and development of distribution networks involving renewable sources. Owing to system complexity, black-box modeling approaches offer more advantages than traditional circuit modeling, as far as electromagnetic compatibility (EMC) analysis and filter design are the targets. In this study, different black-box modeling techniques for power converters are introduced and systematically analyzed. First, the general theory of black-box modeling is explained. Subsequently, three different modeling approaches are compared in terms of accuracy and the required experimental setup. Finally, the possible limitations of black-box modeling of power converters are investigated and discussed.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873788/9826496/09826502.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46451110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Two-stage Correction Strategy-based Real-time Dispatch for Economic Operation of Microgrids 基于两阶段校正策略的微电网经济运行实时调度

Chinese Journal of Electrical Engineering Pub Date : 2022-06-01 DOI: 10.23919/CJEE.2022.000013

Jingliao Sun;Changhong Hu;Lei Liu;Bei Zhao;Jinyuan Liu;Jianquan Shi

引用次数: 3