Pub Date : 2024-09-13DOI: 10.1109/TASC.2024.3456565
Anchen Yang;Mingyao Lin;Lun Jia;Keman Lin
This manuscript introduces a hall-based modified finite position set-phase locked loop (HM-FPS-PLL) method designed for the control system of permanent magnet synchronous motors (PMSMs) in electric vehicles (EVs). The innovative aspect of the presented method lies in utilizing hall sensors pre-installed within the motor and a permanent magnet (PM) flux observer, simultaneously increasing the precision of calculation while reducing computational load. In contrast to traditional sensorless methods employing PLL, this method eliminates the dependency on the PI controller. Both simulations and experimental validations have been conducted to confirm the precision and feasibility of the HM-FPS-PLL method.
本手稿介绍了一种基于霍尔的改进型有限位置设定锁相环（HM-FPS-PLL）方法，该方法专为电动汽车（EV）中的永磁同步电机（PMSM）控制系统而设计。该方法的创新之处在于利用了预装在电机内的霍尔传感器和永磁（PM）磁通观测器，在提高计算精度的同时减少了计算负荷。与采用 PLL 的传统无传感器方法相比，该方法消除了对 PI 控制器的依赖。模拟和实验验证证实了 HM-FPS-PLL 方法的精确性和可行性。
{"title":"A Hall-Based Modified Finite Position Set-Phase Locked Loop for PMSM Control System in EVs","authors":"Anchen Yang;Mingyao Lin;Lun Jia;Keman Lin","doi":"10.1109/TASC.2024.3456565","DOIUrl":"https://doi.org/10.1109/TASC.2024.3456565","url":null,"abstract":"This manuscript introduces a hall-based modified finite position set-phase locked loop (HM-FPS-PLL) method designed for the control system of permanent magnet synchronous motors (PMSMs) in electric vehicles (EVs). The innovative aspect of the presented method lies in utilizing hall sensors pre-installed within the motor and a permanent magnet (PM) flux observer, simultaneously increasing the precision of calculation while reducing computational load. In contrast to traditional sensorless methods employing PLL, this method eliminates the dependency on the PI controller. Both simulations and experimental validations have been conducted to confirm the precision and feasibility of the HM-FPS-PLL method.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142246412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-12DOI: 10.1109/TASC.2024.3459627
Xiaofan Liang;Xucheng Zhou;Yan Li;Yihao Chen;Yin Ding;Yuchen He;Li Wang;Zigang Deng
As an innovative maglev system, the high-temperature superconducting (HTS) pinning magnetic levitation (maglev) train achieves levitation and guidance through the interaction between the HTS bulks in the levitator and the permanent magnet guideway. To ensure that the HTS pinning maglev maintains a stable levitation working state, the ambient temperature of the HTS bulk must remain below its critical temperature. The current method is injecting liquid nitrogen (LN 2 ) into the levitator's liquid tank for cooling. However, due to heat transfer, LN 2 in the tank is not always fully replenished. External disturbances can cause LN 2 sloshing, which affects the vehicle's dynamic performance. This issue remains underexplored by scholars. In this article, LN 2 excitation is integrated into studying the dynamic performance of HTS pinning maglev for the first time. First, a spring–mass model is established to deal with the LN 2 sloshing in the levitator equivalently. Computational fluid dynamics software verifies the feasibility of this model. The equivalent model is then integrated into the vehicle system to develop an HTS pinning vehicle dynamics model, which is validated by experimental data. Subsequently, the dynamic response of the vehicle and the levitators considering the LN 2 sloshing is analyzed. Finally, the optimal LN 2 filling ratio in the levitator is proposed from the perspective of dynamic performance optimization. The results show that the LN 2 sloshing in the levitator has a particular influence on the lateral vibration, lateral displacement, and roll angle of the HTS pinning maglev vehicle. In addition, it is recommended to replenish LN 2 when the filling ratio inside the levitator reaches 70%. This work enhances the understanding of the dynamic response of HTS pinning maglev trains under multiple excitations and provides a reference for refining HTS pinning maglev modeling.
{"title":"Effect of LN2 Sloshing on the Lateral Dynamic of HTS Pinning Maglev","authors":"Xiaofan Liang;Xucheng Zhou;Yan Li;Yihao Chen;Yin Ding;Yuchen He;Li Wang;Zigang Deng","doi":"10.1109/TASC.2024.3459627","DOIUrl":"10.1109/TASC.2024.3459627","url":null,"abstract":"As an innovative maglev system, the high-temperature superconducting (HTS) pinning magnetic levitation (maglev) train achieves levitation and guidance through the interaction between the HTS bulks in the levitator and the permanent magnet guideway. To ensure that the HTS pinning maglev maintains a stable levitation working state, the ambient temperature of the HTS bulk must remain below its critical temperature. The current method is injecting liquid nitrogen (LN\u0000<sub>2</sub>\u0000) into the levitator's liquid tank for cooling. However, due to heat transfer, LN\u0000<sub>2</sub>\u0000 in the tank is not always fully replenished. External disturbances can cause LN\u0000<sub>2</sub>\u0000 sloshing, which affects the vehicle's dynamic performance. This issue remains underexplored by scholars. In this article, LN\u0000<sub>2</sub>\u0000 excitation is integrated into studying the dynamic performance of HTS pinning maglev for the first time. First, a spring–mass model is established to deal with the LN\u0000<sub>2</sub>\u0000 sloshing in the levitator equivalently. Computational fluid dynamics software verifies the feasibility of this model. The equivalent model is then integrated into the vehicle system to develop an HTS pinning vehicle dynamics model, which is validated by experimental data. Subsequently, the dynamic response of the vehicle and the levitators considering the LN\u0000<sub>2</sub>\u0000 sloshing is analyzed. Finally, the optimal LN\u0000<sub>2</sub>\u0000 filling ratio in the levitator is proposed from the perspective of dynamic performance optimization. The results show that the LN\u0000<sub>2</sub>\u0000 sloshing in the levitator has a particular influence on the lateral vibration, lateral displacement, and roll angle of the HTS pinning maglev vehicle. In addition, it is recommended to replenish LN\u0000<sub>2</sub>\u0000 when the filling ratio inside the levitator reaches 70%. This work enhances the understanding of the dynamic response of HTS pinning maglev trains under multiple excitations and provides a reference for refining HTS pinning maglev modeling.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 9","pages":"1-9"},"PeriodicalIF":1.7,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-11DOI: 10.1109/TASC.2024.3450991
Calvin C. T. Chow;Min Zhang;K. T. Chau;Francesco Grilli
High-temperature superconducting tapes can be stacked together to form cables which are then wound into coils for potential use in electrical machines. The tapes in the cable can either be uncoupled (insulated from each other), coupled at ends (coupled at the terminals of the cable), or fully coupled (electrically connected with each other along the whole length of the cable). The integral method can readily model the uncoupled scenario, and this article extends the integral method to model the coupled-at-ends and fully coupled scenarios. We find that the proposed method has a time advantage over the well-established T–A formulation of Maxwell's equations.
{"title":"Modeling HTS Coils With Different Coupling Scenarios via Integral Method","authors":"Calvin C. T. Chow;Min Zhang;K. T. Chau;Francesco Grilli","doi":"10.1109/TASC.2024.3450991","DOIUrl":"10.1109/TASC.2024.3450991","url":null,"abstract":"High-temperature superconducting tapes can be stacked together to form cables which are then wound into coils for potential use in electrical machines. The tapes in the cable can either be uncoupled (insulated from each other), coupled at ends (coupled at the terminals of the cable), or fully coupled (electrically connected with each other along the whole length of the cable). The integral method can readily model the uncoupled scenario, and this article extends the integral method to model the coupled-at-ends and fully coupled scenarios. We find that the proposed method has a time advantage over the well-established \u0000<italic>T–A</i>\u0000 formulation of Maxwell's equations.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 9","pages":"1-9"},"PeriodicalIF":1.7,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456559
Hu Xiong;Jiayuan Li;Xianming Xie;Bin Xiang;Xiaoguang Jiang;Changchen Zhu;Zhixiong Liu
In transformer production, some manufacturers use aluminum to impersonate copper to reduce the manufacturing cost, which is difficult to be detected and can cause significant losses to the power grid. To address the problem of non-destructive identification of winding material in distribution transformers, we propose a multi- information recognition method by fusing the harmonic resistance coefficient and the appearance parameters of the transformer, namely volume and height. Then the winding material is identified by a trained support vector machine model. The test results demonstrate that our proposed method achieves 90% recognition accuracy for copper transformers and 100% accuracy for aluminum transformers with the test samples. Additionally, the proposed non-destructive method is easier to implement than other methods in engineering.
{"title":"Identification Winding Material of Distribution Transformer Based on Multi-Information Fusion","authors":"Hu Xiong;Jiayuan Li;Xianming Xie;Bin Xiang;Xiaoguang Jiang;Changchen Zhu;Zhixiong Liu","doi":"10.1109/TASC.2024.3456559","DOIUrl":"10.1109/TASC.2024.3456559","url":null,"abstract":"In transformer production, some manufacturers use aluminum to impersonate copper to reduce the manufacturing cost, which is difficult to be detected and can cause significant losses to the power grid. To address the problem of non-destructive identification of winding material in distribution transformers, we propose a multi- information recognition method by fusing the harmonic resistance coefficient and the appearance parameters of the transformer, namely volume and height. Then the winding material is identified by a trained support vector machine model. The test results demonstrate that our proposed method achieves 90% recognition accuracy for copper transformers and 100% accuracy for aluminum transformers with the test samples. Additionally, the proposed non-destructive method is easier to implement than other methods in engineering.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456578
Lei Chen;Xiaoyan You;Zhenqiang Li;Huiwen He;Man Yang;Shencong Zheng;Jingguang Tang;Hongkun Chen
Regarding a hybrid energy storage system (ESS) with superconducting magnetic energy storage (SMES) and battery, it can adopt the virtual synchronous generator (VSG) control to fulfill the grid-forming capability while doing more active voltage/frequency support. This article proposes an optimal impedance reshaping approach to inhibit the subsynchronous oscillation in the VSG based on the SMES-battery. Firstly, the theoretical modeling of the VSG as well as the SMES-battery is conducted. Then, the VSG's sequence impedance characteristic is investigated, and the subsynchronous oscillation influence is analyzed. By introducing an impedance reshaping link and revealing its effects on the VSG's low-frequency impedance, an optimized objective function with a minimum impedance phase difference is designed, and the improved particle swarm optimization is adopted for obtaining the solution. Using the MATLAB platform, a detailed simulation model is created, and different algorithms are considered to check the performance of the optimal impedance reshaping approach. Combining the time-domain simulation waveforms and frequency responses, the proposed method enables to effectively ameliorate the impedance features of the VSG, and inhibit the low-frequency oscillation while alleviating the power and current transients.
{"title":"Optimal Impedance Reshaping Approach for Inhibiting Subsynchronous Oscillation in Virtual Synchronous Generator Based on SMES-Battery","authors":"Lei Chen;Xiaoyan You;Zhenqiang Li;Huiwen He;Man Yang;Shencong Zheng;Jingguang Tang;Hongkun Chen","doi":"10.1109/TASC.2024.3456578","DOIUrl":"10.1109/TASC.2024.3456578","url":null,"abstract":"Regarding a hybrid energy storage system (ESS) with superconducting magnetic energy storage (SMES) and battery, it can adopt the virtual synchronous generator (VSG) control to fulfill the grid-forming capability while doing more active voltage/frequency support. This article proposes an optimal impedance reshaping approach to inhibit the subsynchronous oscillation in the VSG based on the SMES-battery. Firstly, the theoretical modeling of the VSG as well as the SMES-battery is conducted. Then, the VSG's sequence impedance characteristic is investigated, and the subsynchronous oscillation influence is analyzed. By introducing an impedance reshaping link and revealing its effects on the VSG's low-frequency impedance, an optimized objective function with a minimum impedance phase difference is designed, and the improved particle swarm optimization is adopted for obtaining the solution. Using the MATLAB platform, a detailed simulation model is created, and different algorithms are considered to check the performance of the optimal impedance reshaping approach. Combining the time-domain simulation waveforms and frequency responses, the proposed method enables to effectively ameliorate the impedance features of the VSG, and inhibit the low-frequency oscillation while alleviating the power and current transients.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456484
Jibin Zou;Mingchuan Liu;Yongxiang Xu;Guodong Yu;Hua Lan
This paper analyzes the vibration contribution of radial and tangential electromagnetic force harmonic of permanent magnet synchronous motor. Firstly, infer the analytical expressions of the air gap magnetic field generated by permanent magnet and armature reaction. Then, the radial and tangential electromagnetic force density produced by different sources are obtained with Maxwell stress theory. After that, the modal shapes and frequencies of the prototype are studied by means of finite element analysis and experimental modal testing. At last, the vibration contribution of radial and tangential electromagnetic force harmonic of the prototype is analyzed quantitatively by harmonic response simulation and experiment. The research demonstrates that in the motor design stage, if the vibration performance is the primary characteristic to be concerned, the contribution of the tangential force needs to be taken seriously.
{"title":"Vibration Contribution Analysis of Radial and Tangential Electromagnetic Force Harmonic of Permanent Magnet Synchronous Motor","authors":"Jibin Zou;Mingchuan Liu;Yongxiang Xu;Guodong Yu;Hua Lan","doi":"10.1109/TASC.2024.3456484","DOIUrl":"10.1109/TASC.2024.3456484","url":null,"abstract":"This paper analyzes the vibration contribution of radial and tangential electromagnetic force harmonic of permanent magnet synchronous motor. Firstly, infer the analytical expressions of the air gap magnetic field generated by permanent magnet and armature reaction. Then, the radial and tangential electromagnetic force density produced by different sources are obtained with Maxwell stress theory. After that, the modal shapes and frequencies of the prototype are studied by means of finite element analysis and experimental modal testing. At last, the vibration contribution of radial and tangential electromagnetic force harmonic of the prototype is analyzed quantitatively by harmonic response simulation and experiment. The research demonstrates that in the motor design stage, if the vibration performance is the primary characteristic to be concerned, the contribution of the tangential force needs to be taken seriously.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456486
Lei Chen;Shencong Zheng;Xiaoyan You;Jiahui Zhu;Yifei Li;Jingguang Tang;Yuqi Jiang;Hongkun Chen
For a back-to-back voltage-source-converter HVDC (BTB-VSC-HVDC) system using virtual synchronous generator (VSG) control, it enables more adaptable voltage and frequency support for the main network. In this article, the investigation of the resistive superconducting fault current limiter (R-SFCL) for increasing the BTB-VSC-HVDC's stability under faults is carried out. Firstly, the topological structure and control scheme of the BTB-VSC-HVDC are expatiated. Then, the influence mechanism of cooperating with the R-SFCL and the VSG controller on the power angle stability (PAS) is explored from an energy balance perspective, where the R-SFCL's effects on boosting the VSC's low-voltage ride-through (LVRT) functionality are considered. In light of the MATLAB platform, a detailed digital model of ±420 kV BTB-VSC-HVDC incorporating R-SFCL is created, and the approach validation of coordinating the R-SFCL as well as the VSG controller to address different fault scenarios is implemented. The simulation findings confirm the R-SFCL's efficacy in dissipating the imbalanced power in the BTB-VSC-HVDC and lifting the LVRT behaviors of the VSC. As the efficient coordination of the R-SFCL and the VSG controller in moderate and serious faults, not only the AC voltage drop is ameliorated, but also the PAS of the demonstrated system is visibly increased.
{"title":"Study of Resistive SFCL for Stability Increase of BTB-VSC-HVDC System Based on Virtual Synchronous Generator Control Strategy","authors":"Lei Chen;Shencong Zheng;Xiaoyan You;Jiahui Zhu;Yifei Li;Jingguang Tang;Yuqi Jiang;Hongkun Chen","doi":"10.1109/TASC.2024.3456486","DOIUrl":"10.1109/TASC.2024.3456486","url":null,"abstract":"For a back-to-back voltage-source-converter HVDC (BTB-VSC-HVDC) system using virtual synchronous generator (VSG) control, it enables more adaptable voltage and frequency support for the main network. In this article, the investigation of the resistive superconducting fault current limiter (R-SFCL) for increasing the BTB-VSC-HVDC's stability under faults is carried out. Firstly, the topological structure and control scheme of the BTB-VSC-HVDC are expatiated. Then, the influence mechanism of cooperating with the R-SFCL and the VSG controller on the power angle stability (PAS) is explored from an energy balance perspective, where the R-SFCL's effects on boosting the VSC's low-voltage ride-through (LVRT) functionality are considered. In light of the MATLAB platform, a detailed digital model of ±420 kV BTB-VSC-HVDC incorporating R-SFCL is created, and the approach validation of coordinating the R-SFCL as well as the VSG controller to address different fault scenarios is implemented. The simulation findings confirm the R-SFCL's efficacy in dissipating the imbalanced power in the BTB-VSC-HVDC and lifting the LVRT behaviors of the VSC. As the efficient coordination of the R-SFCL and the VSG controller in moderate and serious faults, not only the AC voltage drop is ameliorated, but also the PAS of the demonstrated system is visibly increased.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-7"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456563
Hongfu Shi;Jun Zheng;Yang Chen;Shicheng He
Superconducting electrodynamic suspension (SCEDS) possesses superiority over others in self-stability, technology maturity, and great levitation gap, rendering it the optimal alternative for sub-sonic travelling integrated with the evacuated tube. However, the coupling relationship among tube and SCEDS train remains ambiguous. As a solution, this work investigates their electromagnetic couplings through demonstrative full-scale simulation model. Initially, the integrated structure and principles are introduced. Subsequently, a simulation model encompassing the tube, superconducting magnets, levitation coils and propulsion windings is established, and its effectiveness is confirmed using openly available experimental data. Finally, the electromagnetic coupling among propulsion, levitation, and guidance systems are explored. The findings indicate minimal impact of additional currents in the tube induced by the levitation coils and propulsion windings. This work can provide the reference for the evacuated tube transportation technology in practical application.
{"title":"Simulation on Electromagnetic Coupling of Integrated EDS Evacuated Tube Transportation System","authors":"Hongfu Shi;Jun Zheng;Yang Chen;Shicheng He","doi":"10.1109/TASC.2024.3456563","DOIUrl":"10.1109/TASC.2024.3456563","url":null,"abstract":"Superconducting electrodynamic suspension (SCEDS) possesses superiority over others in self-stability, technology maturity, and great levitation gap, rendering it the optimal alternative for sub-sonic travelling integrated with the evacuated tube. However, the coupling relationship among tube and SCEDS train remains ambiguous. As a solution, this work investigates their electromagnetic couplings through demonstrative full-scale simulation model. Initially, the integrated structure and principles are introduced. Subsequently, a simulation model encompassing the tube, superconducting magnets, levitation coils and propulsion windings is established, and its effectiveness is confirmed using openly available experimental data. Finally, the electromagnetic coupling among propulsion, levitation, and guidance systems are explored. The findings indicate minimal impact of additional currents in the tube induced by the levitation coils and propulsion windings. This work can provide the reference for the evacuated tube transportation technology in practical application.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-4"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456571
Meng Xiao;Xiaodan Du;Liangtian Zhang;Wenan Liu;Boxue Du
Polypropylene (PP) is affected by the complex stresses such as electricity and heat for a long time in practical application, and the dielectric breakdown properties often decrease, which significantly lessens the service life of metalized film capacitors. The long-term stability of dielectric materials depends on the process parameter. In this paper, PP samples are prepared with various ash content, and the electrothermal aging test is carried out. The results suggest that after aging, the breakdown strength of the samples with high ash content indicates a reduction of 10.9%. In contrast, the breakdown strength of low ash content PP samples exhibits a decline of merely 3.8%. The matal ash within PP matrix generates initial free radicals during the process of aging degradation under the electrothermal field and catalyzes the decomposition of hydroperoxides to promote the aging reaction process. The research results provide guidance for enhancing the long-term operation performance of PP.
{"title":"Effect of Metal Ash on Dielectric Properties of Polypropylene for Film Capacitor Under Electro-Thermal Aging","authors":"Meng Xiao;Xiaodan Du;Liangtian Zhang;Wenan Liu;Boxue Du","doi":"10.1109/TASC.2024.3456571","DOIUrl":"10.1109/TASC.2024.3456571","url":null,"abstract":"Polypropylene (PP) is affected by the complex stresses such as electricity and heat for a long time in practical application, and the dielectric breakdown properties often decrease, which significantly lessens the service life of metalized film capacitors. The long-term stability of dielectric materials depends on the process parameter. In this paper, PP samples are prepared with various ash content, and the electrothermal aging test is carried out. The results suggest that after aging, the breakdown strength of the samples with high ash content indicates a reduction of 10.9%. In contrast, the breakdown strength of low ash content PP samples exhibits a decline of merely 3.8%. The matal ash within PP matrix generates initial free radicals during the process of aging degradation under the electrothermal field and catalyzes the decomposition of hydroperoxides to promote the aging reaction process. The research results provide guidance for enhancing the long-term operation performance of PP.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-4"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-10DOI: 10.1109/TASC.2024.3456573
Jiaocui Wan;Zhanyang Yu;Pengzhe Zhuang;Xuyang Hu;Xiaoyao Yu;Yan Li
Solenoid is core component of intermediate-frequency Electromagnetic heating system, and its inductance affects power and efficiency of system. In order to accurately calculate inductance of solenoid under different working conditions, an analytical calculation model of solenoid inductance is proposed, which can consider nonlinear variation and temperature change of ferromagnetic material. First of all, magnetic and electrical properties of Q235 are tested by ring sample method and van der Pauw method, and relative permeability curves under different magnetic densities and resistivity curves at different temperatures are obtained. Secondly, based on equivalent magnetic network (EMN) solution method, analytical calculation model of solenoid inductance considering nonlinearity of ferromagnetic material is established, magnetic field distribution in solution domain is calculated, and solenoid inductance value is obtained. Influence of temperature change on solenoid inductance is considered. Finally, a set of rated power 25 kW intermediate-frequency electromagnetic energy storage solenoid is tested under multiple operating conditions to verify effectiveness of proposed analytical model.
{"title":"Analytical Modeling of Solenoid Inductance in Intermediate-Frequency Electromagnetic Heating System","authors":"Jiaocui Wan;Zhanyang Yu;Pengzhe Zhuang;Xuyang Hu;Xiaoyao Yu;Yan Li","doi":"10.1109/TASC.2024.3456573","DOIUrl":"10.1109/TASC.2024.3456573","url":null,"abstract":"Solenoid is core component of intermediate-frequency Electromagnetic heating system, and its inductance affects power and efficiency of system. In order to accurately calculate inductance of solenoid under different working conditions, an analytical calculation model of solenoid inductance is proposed, which can consider nonlinear variation and temperature change of ferromagnetic material. First of all, magnetic and electrical properties of Q235 are tested by ring sample method and van der Pauw method, and relative permeability curves under different magnetic densities and resistivity curves at different temperatures are obtained. Secondly, based on equivalent magnetic network (EMN) solution method, analytical calculation model of solenoid inductance considering nonlinearity of ferromagnetic material is established, magnetic field distribution in solution domain is calculated, and solenoid inductance value is obtained. Influence of temperature change on solenoid inductance is considered. Finally, a set of rated power 25 kW intermediate-frequency electromagnetic energy storage solenoid is tested under multiple operating conditions to verify effectiveness of proposed analytical model.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"34 8","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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