Pub Date : 2025-09-01DOI: 10.23919/CJEE.2025.000127
Zheng Li;Hualin Han;Minglei Tang;Hongyu Sha;Hexu Sun
To increase the transmission efficiency of a wireless power transmission system while ensuring high stability and low cost, a two-degree-of-freedom two-sided control strategy to control the phase-shift duty ratio of the triggered pulse of the primary inverter and the angle between the resonant current and the AC voltage of the secondary side is proposed. The control strategy does not require additional DC-DC converters and components, and only some parameters of the basic circuit can be adjusted. The zero-voltage switching (ZVS) of all the MOSFETs in the system can be achieved by adjusting the shift duty ratio and power angle, and the current and voltage on the load side can be adjusted in real time. First, the basic principle of the two-sided control and the relationship of the phase angle are analyzed, and the operating range is determined by analyzing the operating modes on both sides. Second, the power loss of each link is analyzed, and the best operating point is determined. Subsequently, the system structure and the control strategy of the proposed method are presented. The two-sided control strategy is verified experimentally, which shows that the system can achieve the ZVS of all the MOSFETs while maintaining a constant current output.
{"title":"Design of a Wireless Power Transmission Control System Based on the Phase-Shift Variable Angle","authors":"Zheng Li;Hualin Han;Minglei Tang;Hongyu Sha;Hexu Sun","doi":"10.23919/CJEE.2025.000127","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000127","url":null,"abstract":"To increase the transmission efficiency of a wireless power transmission system while ensuring high stability and low cost, a two-degree-of-freedom two-sided control strategy to control the phase-shift duty ratio of the triggered pulse of the primary inverter and the angle between the resonant current and the AC voltage of the secondary side is proposed. The control strategy does not require additional DC-DC converters and components, and only some parameters of the basic circuit can be adjusted. The zero-voltage switching (ZVS) of all the MOSFETs in the system can be achieved by adjusting the shift duty ratio and power angle, and the current and voltage on the load side can be adjusted in real time. First, the basic principle of the two-sided control and the relationship of the phase angle are analyzed, and the operating range is determined by analyzing the operating modes on both sides. Second, the power loss of each link is analyzed, and the best operating point is determined. Subsequently, the system structure and the control strategy of the proposed method are presented. The two-sided control strategy is verified experimentally, which shows that the system can achieve the ZVS of all the MOSFETs while maintaining a constant current output.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 3","pages":"81-97"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11207218","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352092","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}
Pub Date : 2025-09-01DOI: 10.23919/CJEE.2025.000138
Khedidja Kendouci;Mohammed El Bachir Ghribi;Khayra Roummani
A novel control strategy is introduced for tracking the maximum power point of a wind turbine coupled with a permanent magnet synchronous generator. In contrast to other control methods, this approach does not rely on an electrical actuator such as a rectifier or inverter. Instead, it uses a mechanical actuator—specifically, a speed multiplier—to ensure maximum power point (MPP) tracking. The selection of the optimal speed multiplication ratio enables the pursuit of the maximum power coefficient by adjusting the tip-speed ratio $(lambda)$ to its optimal value. This approach requires no learning time, only knowledge of the wind turbine and generator parameters, which are used for selecting or sizing the speed multiplier and for control purposes. The new approach is validated through simulation in Matlab/Simulink, incorporating a wind profile measured by our team over a 15-day period. The results demonstrate effective tracking of maximum power, achieving a power coefficient efficiency of 98.1%. Considering the measured variability of the wind, the overall energy efficiency over the 15 days reaches 99.16%. The approach is applied to a model of a low-power wind turbine designed for domestic applications.
{"title":"Maximum Power Point Tracking Control of a Wind Turbine with an Action on the Speed Multiplier","authors":"Khedidja Kendouci;Mohammed El Bachir Ghribi;Khayra Roummani","doi":"10.23919/CJEE.2025.000138","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000138","url":null,"abstract":"A novel control strategy is introduced for tracking the maximum power point of a wind turbine coupled with a permanent magnet synchronous generator. In contrast to other control methods, this approach does not rely on an electrical actuator such as a rectifier or inverter. Instead, it uses a mechanical actuator—specifically, a speed multiplier—to ensure maximum power point (MPP) tracking. The selection of the optimal speed multiplication ratio enables the pursuit of the maximum power coefficient by adjusting the tip-speed ratio <tex>$(lambda)$</tex> to its optimal value. This approach requires no learning time, only knowledge of the wind turbine and generator parameters, which are used for selecting or sizing the speed multiplier and for control purposes. The new approach is validated through simulation in Matlab/Simulink, incorporating a wind profile measured by our team over a 15-day period. The results demonstrate effective tracking of maximum power, achieving a power coefficient efficiency of 98.1%. Considering the measured variability of the wind, the overall energy efficiency over the 15 days reaches 99.16%. The approach is applied to a model of a low-power wind turbine designed for domestic applications.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 3","pages":"231-242"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11207164","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352221","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}
Pub Date : 2025-09-01DOI: 10.23919/CJEE.2025.000176
Lan Sun;Haoyang Yin;Yucheng Zhang;Chao Wang;Guanjun Zhang;Wendong Li
The gas-solid interfaces formed by solid insulation and gas atmosphere are weak links in the insulation of electrical equipment. They are prone to surface flashover or breakdown, leading to accidents that severely affect the safe and stable operation of power systems. In recent years, the construction of dielectric functionally graded insulation (d-FGI) has become an effective solution to address this issue. This paper employs an iterative algorithm to optimize the spatial distribution of permittivity for d-FGIs in truncated cone insulators and analyzes the comprehensive influence of various parameters on the electric-field optimization effect. The optimization results show that the maximum surface electric-field strength of the graded insulators can be reduced by over 70% under ideal conditions, indicating a significant optimization effect. Photosensitive resin-based dielectric-grade insulators were prepared using stereolithography 3D printing technology. Flashover voltage tests were conducted on the photosensitive resin-based graded insulator samples. The results demonstrate that under 0.4 MPa SF6 gas, the flashover voltage of photosensitive resin-based dielectric graded insulators can be increased by up to 22.46% compared to pure photosensitive resin insulators, showing a notable improvement in electrical performance.
{"title":"Fabrication and Electrical Withstand Performance Investigation of Stereolithography-Based Dielectric Functionally Graded Insulators","authors":"Lan Sun;Haoyang Yin;Yucheng Zhang;Chao Wang;Guanjun Zhang;Wendong Li","doi":"10.23919/CJEE.2025.000176","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000176","url":null,"abstract":"The gas-solid interfaces formed by solid insulation and gas atmosphere are weak links in the insulation of electrical equipment. They are prone to surface flashover or breakdown, leading to accidents that severely affect the safe and stable operation of power systems. In recent years, the construction of dielectric functionally graded insulation (d-FGI) has become an effective solution to address this issue. This paper employs an iterative algorithm to optimize the spatial distribution of permittivity for d-FGIs in truncated cone insulators and analyzes the comprehensive influence of various parameters on the electric-field optimization effect. The optimization results show that the maximum surface electric-field strength of the graded insulators can be reduced by over 70% under ideal conditions, indicating a significant optimization effect. Photosensitive resin-based dielectric-grade insulators were prepared using stereolithography 3D printing technology. Flashover voltage tests were conducted on the photosensitive resin-based graded insulator samples. The results demonstrate that under 0.4 MPa SF<inf>6</inf> gas, the flashover voltage of photosensitive resin-based dielectric graded insulators can be increased by up to 22.46% compared to pure photosensitive resin insulators, showing a notable improvement in electrical performance.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 3","pages":"68-80"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11207159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352256","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}
This paper presents a comprehensive analysis of the insulation breakdown phenomenon in epoxy resin insulation induced by the degradation of electrical trees, with reference to both domestic and international studies. It elucidates the mechanisms of electrical tree initiation and degradation in epoxy resins by drawing on the theories of space charge accumulation and migration, local electric field formation, ultraviolet radiation, and mechanical stress chain breakage. The paper also discusses the operational conditions of the electrical equipment, detailing the effects of superimposed electric fields, temperature gradients, mechanical stresses, magnetic gradients, and humid environments on the insulation degradation of the epoxy resin. Furthermore, it summarizes the correlation between tree growth characteristics and charge transport behavior under the influence of multiple physical fields. To enhance the insulation performance of epoxy resins and ensure the safe and reliable operation of electrical equipment, methods to inhibit electrical tree formation are discussed. These methods include the regulation of the manufacturing process, inorganic doping, and the use of self-repairing materials. The inhibition mechanisms are analyzed at the molecular configuration level and microstructural scale, and from a macroscopic standpoint. This study aimed to provide recommendations for future research on the growth and suppression of electrical trees in epoxy resin based on the current state of knowledge.
{"title":"Research Progress on Electrical Treeing in Epoxy Resin Insulation Materials","authors":"Wenjin Zhang;Boxue Du;Guoning Sun;Mi Xiao;Zhijun Guo;Hucheng Liang","doi":"10.23919/CJEE.2025.000162","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000162","url":null,"abstract":"This paper presents a comprehensive analysis of the insulation breakdown phenomenon in epoxy resin insulation induced by the degradation of electrical trees, with reference to both domestic and international studies. It elucidates the mechanisms of electrical tree initiation and degradation in epoxy resins by drawing on the theories of space charge accumulation and migration, local electric field formation, ultraviolet radiation, and mechanical stress chain breakage. The paper also discusses the operational conditions of the electrical equipment, detailing the effects of superimposed electric fields, temperature gradients, mechanical stresses, magnetic gradients, and humid environments on the insulation degradation of the epoxy resin. Furthermore, it summarizes the correlation between tree growth characteristics and charge transport behavior under the influence of multiple physical fields. To enhance the insulation performance of epoxy resins and ensure the safe and reliable operation of electrical equipment, methods to inhibit electrical tree formation are discussed. These methods include the regulation of the manufacturing process, inorganic doping, and the use of self-repairing materials. The inhibition mechanisms are analyzed at the molecular configuration level and microstructural scale, and from a macroscopic standpoint. This study aimed to provide recommendations for future research on the growth and suppression of electrical trees in epoxy resin based on the current state of knowledge.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 3","pages":"1-17"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11207228","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145351919","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}
Pub Date : 2025-09-01DOI: 10.23919/CJEE.2025.000118
Huawei Zhou;Yixin Gan;Chen Ye
Five-phase permanent-magnet synchronous motors (PMSMs) offer high fault tolerance, low torque ripple, and high torque density. An open-circuit fault results in an asymmetric motor model, which causes direct current (DC) bias and harmonics, thus affecting operational performance with sensorless control under fault-tolerant conditions. To improve operational performance, this study proposes a novel sliding mode observer (SMO) based on an enhanced adaptive complex-coefficient filter (EACCF) for the sensorless vector-control strategy of a five-phase PMSM with an open-circuit fault. The novelty of the proposed strategy is the development of the EACCF, which is characterized by an effective DC bias and harmonic-attenuation capability. Additionally, the fundamental back electromotive force can be estimated without phase lag or amplitude attenuation using the SMO. By incorporating a phase-locked loop, the accuracy of position estimation can be improved under both healthy and open-circuit fault conditions. The sensorless control can not only restrain the fluctuating torque caused by open-circuit faults but also offers good steady-state and dynamic performances under healthy and open-circuit fault conditions. Experimental results are presented to demonstrate the feasibility of the proposed method.
{"title":"Enhanced Adaptive Complex-Coefficient Filter-Based Sensorless Control of Five-phase PMSM with Open-Circuit Fault","authors":"Huawei Zhou;Yixin Gan;Chen Ye","doi":"10.23919/CJEE.2025.000118","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000118","url":null,"abstract":"Five-phase permanent-magnet synchronous motors (PMSMs) offer high fault tolerance, low torque ripple, and high torque density. An open-circuit fault results in an asymmetric motor model, which causes direct current (DC) bias and harmonics, thus affecting operational performance with sensorless control under fault-tolerant conditions. To improve operational performance, this study proposes a novel sliding mode observer (SMO) based on an enhanced adaptive complex-coefficient filter (EACCF) for the sensorless vector-control strategy of a five-phase PMSM with an open-circuit fault. The novelty of the proposed strategy is the development of the EACCF, which is characterized by an effective DC bias and harmonic-attenuation capability. Additionally, the fundamental back electromotive force can be estimated without phase lag or amplitude attenuation using the SMO. By incorporating a phase-locked loop, the accuracy of position estimation can be improved under both healthy and open-circuit fault conditions. The sensorless control can not only restrain the fluctuating torque caused by open-circuit faults but also offers good steady-state and dynamic performances under healthy and open-circuit fault conditions. Experimental results are presented to demonstrate the feasibility of the proposed method.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 3","pages":"178-190"},"PeriodicalIF":3.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11207219","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352238","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}
Pub Date : 2025-08-27DOI: 10.23919/CJEE.2025.000123
Lingyun Shao;Xueyi Yan;Zhuoran Zhang;Zhongze Wu
To achieve the utilization of torque components by current harmonics and the limitation of copper loss in a dual three-phase yokeless and segmented armature (YASA) axial flux permanent magnet (AFPM) machine, optimized 5th and 7th current harmonic injection is proposed. The torque component generated by the current harmonics is analyzed based on the vector space decomposition (VSD) model of the dual three-phase YASA machine, with consideration of the 5th and 7th harmonics of the open-circuit flux linkage. The optimization of 5th and 7th current harmonics, aiming for maximum torque with limited copper loss (MTLCL), is conducted and compared with existing optimization methods. Subsequently, simulations with and without current harmonic injection are conducted to compare and verify the proposed optimization. The simulation results show that the torque generated by the harmonics in the proposed method is 6.91% higher than that in the existing method, with 5th and 7th open-circuit flux-linkage harmonics of 17.72% and 5.3% of the fundamental component, respectively. A prototype is built, and the experimental results show that the torque component by current harmonics achieves 2.60% of that by the fundamental current with the limitation of copper loss, which further validates the proposed method.
{"title":"Utilization of Torque Component by Current Harmonics with Limitation of Copper Loss in Dual Three-phase YASA AFPM Machine","authors":"Lingyun Shao;Xueyi Yan;Zhuoran Zhang;Zhongze Wu","doi":"10.23919/CJEE.2025.000123","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000123","url":null,"abstract":"To achieve the utilization of torque components by current harmonics and the limitation of copper loss in a dual three-phase yokeless and segmented armature (YASA) axial flux permanent magnet (AFPM) machine, optimized 5th and 7th current harmonic injection is proposed. The torque component generated by the current harmonics is analyzed based on the vector space decomposition (VSD) model of the dual three-phase YASA machine, with consideration of the 5th and 7th harmonics of the open-circuit flux linkage. The optimization of 5th and 7th current harmonics, aiming for maximum torque with limited copper loss (MTLCL), is conducted and compared with existing optimization methods. Subsequently, simulations with and without current harmonic injection are conducted to compare and verify the proposed optimization. The simulation results show that the torque generated by the harmonics in the proposed method is 6.91% higher than that in the existing method, with 5th and 7th open-circuit flux-linkage harmonics of 17.72% and 5.3% of the fundamental component, respectively. A prototype is built, and the experimental results show that the torque component by current harmonics achieves 2.60% of that by the fundamental current with the limitation of copper loss, which further validates the proposed method.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 4","pages":"102-111"},"PeriodicalIF":3.5,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11142931","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915627","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}
Pub Date : 2025-06-17DOI: 10.23919/CJEE.2025.000136
Avishek Munsi;Sushan Pradhan;Kunwar Aditya
Wireless power transfer (WPT) systems offer promising solutions for charging electronic devices by eliminating the need for physical connectors. A comprehensive review of the key aspects of WPT systems is provided, including resonant inverter and rectifier topologies, control strategies, standards, electromagnetic field (EMF) safety protocols, and mechanisms for foreign object detection (FOD), living object detection (LOD), and metal object detection (MOD). Various resonant inverters and rectifier topologies, including their respective advantages and disadvantages, are analyzed. Control strategies for WPT systems are discussed in detail, with an emphasis on both direct and indirect control methods. Existing wireless charging standards, as well as EMF safety standards, are reviewed. Additionally, the significance of FOD and techniques for LOD and MOD are explored, underscoring their critical role in ensuring the safety and efficiency of WPT systems. This paper serves as a comprehensive guide for researchers and practitioners in the field of WPT, offering insights into key considerations and challenges in the development and implementation of WPT technology.
{"title":"Advancements in Inductive Wireless Power Transfer: A Comprehensive Review","authors":"Avishek Munsi;Sushan Pradhan;Kunwar Aditya","doi":"10.23919/CJEE.2025.000136","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000136","url":null,"abstract":"Wireless power transfer (WPT) systems offer promising solutions for charging electronic devices by eliminating the need for physical connectors. A comprehensive review of the key aspects of WPT systems is provided, including resonant inverter and rectifier topologies, control strategies, standards, electromagnetic field (EMF) safety protocols, and mechanisms for foreign object detection (FOD), living object detection (LOD), and metal object detection (MOD). Various resonant inverters and rectifier topologies, including their respective advantages and disadvantages, are analyzed. Control strategies for WPT systems are discussed in detail, with an emphasis on both direct and indirect control methods. Existing wireless charging standards, as well as EMF safety standards, are reviewed. Additionally, the significance of FOD and techniques for LOD and MOD are explored, underscoring their critical role in ensuring the safety and efficiency of WPT systems. This paper serves as a comprehensive guide for researchers and practitioners in the field of WPT, offering insights into key considerations and challenges in the development and implementation of WPT technology.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 4","pages":"75-101"},"PeriodicalIF":3.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11039188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145915612","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}
The high penetration of renewable energy has led to the widespread emergence of weak grids, under which grid-following (GFL) inverters suffer from dynamic instability induced by phase-locked loops (PLL). Although reducing the bandwidth of the PLL can enhance system stability, it significantly degrades the ability of the inverter to reject power interaction disturbances. The inherent trade-off between the bandwidth of the PLL and its disturbance suppression capability are investigated. A cooperative strategy through a grid-forming (GFM) inverter to improve the robustness of GFL inverters without requiring hardware modifications is introduced. The simulation results validate that the proposed strategy effectively suppresses power interaction disturbances and enhances system stability under weak-grid scenarios.
{"title":"Suppression of Power Interaction Disturbances in Grid-Following Inverters Through the Grid-Forming Cooperative Strategy","authors":"Yongkang Chang;Xing Zhang;Ming Li;Xiangdui Zhan;Hua Geng","doi":"10.23919/CJEE.2025.000142","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000142","url":null,"abstract":"The high penetration of renewable energy has led to the widespread emergence of weak grids, under which grid-following (GFL) inverters suffer from dynamic instability induced by phase-locked loops (PLL). Although reducing the bandwidth of the PLL can enhance system stability, it significantly degrades the ability of the inverter to reject power interaction disturbances. The inherent trade-off between the bandwidth of the PLL and its disturbance suppression capability are investigated. A cooperative strategy through a grid-forming (GFM) inverter to improve the robustness of GFL inverters without requiring hardware modifications is introduced. The simulation results validate that the proposed strategy effectively suppresses power interaction disturbances and enhances system stability under weak-grid scenarios.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 2","pages":"226-234"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11077885","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597623","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}
Pub Date : 2025-06-01DOI: 10.23919/CJEE.2025.000140
Menghao Li;Hao Li;Jie Ren;Sideng Hu;Xiangning He
By integrating a temperature-adaptive function, an active gate driver (AGD) enhances the switching performance of silicon carbide (SiC) MOSFETs under varying temperature conditions. However, the lack of analytical expressions describing the coupling between AGD parameters and temperature variation limits the broader application of this method, particularly in SiC modules that exhibit complicated device transient behaviors. To address this challenge, a mathematical model of the transient behavior of an SiC module is developed to investigate the relationship among AGD parameters, junction temperature, and switching performance. The analysis reveals that the impact of temperature on switching performance is directly linked to the duration of each gate resistance. Accordingly, a temperature-adaptive AGD for SiC MOSFET modules is proposed. Online junction temperature monitoring is achieved using turn-on delay detection, and the duration of each gate's driving resistance is dynamically adjusted. The proposed temperature-adaptive AGD is validated experimentally using a commercial 1.2 kV/560 A SiC MOSFET at 600 V/200 A. Experimental results across a temperature range of 20°C to 100°C demonstrate that electrical stress variation remains within 15%, while loss variation does not exceed 10%.
{"title":"Principle and Implementation of Temperature-Adaptive Active Gate Driver for SiC MOSFET Module","authors":"Menghao Li;Hao Li;Jie Ren;Sideng Hu;Xiangning He","doi":"10.23919/CJEE.2025.000140","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000140","url":null,"abstract":"By integrating a temperature-adaptive function, an active gate driver (AGD) enhances the switching performance of silicon carbide (SiC) MOSFETs under varying temperature conditions. However, the lack of analytical expressions describing the coupling between AGD parameters and temperature variation limits the broader application of this method, particularly in SiC modules that exhibit complicated device transient behaviors. To address this challenge, a mathematical model of the transient behavior of an SiC module is developed to investigate the relationship among AGD parameters, junction temperature, and switching performance. The analysis reveals that the impact of temperature on switching performance is directly linked to the duration of each gate resistance. Accordingly, a temperature-adaptive AGD for SiC MOSFET modules is proposed. Online junction temperature monitoring is achieved using turn-on delay detection, and the duration of each gate's driving resistance is dynamically adjusted. The proposed temperature-adaptive AGD is validated experimentally using a commercial 1.2 kV/560 A SiC MOSFET at 600 V/200 A. Experimental results across a temperature range of 20°C to 100°C demonstrate that electrical stress variation remains within 15%, while loss variation does not exceed 10%.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 2","pages":"216-225"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11077900","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597942","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}
Magnetic coupling wireless power transfer (MC-WPT) technology has garnered increasing attention owing to its development and the growing demand for applications. In MC-WPT systems, transmitter-only control requires only a closed-loop controller at the transmitter, which can help to reduce the weight, volume, cost, and complexity of the WPT receiver. Therefore, existing transmitter-only control schemes are comprehensively reviewed. Firstly, the fundamental operating principle of the MC-WPT transmitter-only control system is analyzed. Subsequently, WPT topologies employing transmitter-only control are analyzed. Building on this foundation, various transmitter-only control methods are systematically categorized, compared, and summarized in detail. Finally, the problems and challenges of transmitter-only control technology are discussed.
{"title":"Overview of Magnetic Coupling Wireless Power Transfer Technology Based on Transmitter-only Control","authors":"Yanwei Jiang;Peizhen Xu;Xujian Shu;Jingjing Yang;Bo Zhang","doi":"10.23919/CJEE.2025.000134","DOIUrl":"https://doi.org/10.23919/CJEE.2025.000134","url":null,"abstract":"Magnetic coupling wireless power transfer (MC-WPT) technology has garnered increasing attention owing to its development and the growing demand for applications. In MC-WPT systems, transmitter-only control requires only a closed-loop controller at the transmitter, which can help to reduce the weight, volume, cost, and complexity of the WPT receiver. Therefore, existing transmitter-only control schemes are comprehensively reviewed. Firstly, the fundamental operating principle of the MC-WPT transmitter-only control system is analyzed. Subsequently, WPT topologies employing transmitter-only control are analyzed. Building on this foundation, various transmitter-only control methods are systematically categorized, compared, and summarized in detail. Finally, the problems and challenges of transmitter-only control technology are discussed.","PeriodicalId":36428,"journal":{"name":"Chinese Journal of Electrical Engineering","volume":"11 2","pages":"78-100"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11077897","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597943","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}
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