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学者姓名：汪晶慧
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Abstract ：
针对磁性材料直流磁化特性难以宽范围精确测量的问题,本文提出直流励磁法测量磁性材料的本征直流磁化曲线,详细分析其测量原理并搭建自动化测量平台.通过上下位机通信合理控制开关管的通断时间,利用高精度采样仪器采样感应电压和励磁电流后进行数据处理.基于测量平台分析其误差来源并加以解决,实现宽范围的磁性材料直流磁化曲线的测量.利用磁导率是真空磁导率的空心电感为被测件,验证直流励磁法的测量精度.最后,利用提出的直流励磁法测量铁氧体和金属磁粉心的直流磁化曲线,将其与大信号交流法测量结果进行比较分析.
Keyword ：
测量 测量 直流励磁 直流励磁 直流磁化特性 直流磁化特性 软磁材料 软磁材料
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| GB/T 7714 | 汪晶慧 , 范鹏 , 陈为 . 基于直流励磁的磁性元件直流磁化特性测量与分析 [J]. | 电工电能新技术 , 2025 , 44 (3) : 99-108 . |
| MLA | 汪晶慧 等. "基于直流励磁的磁性元件直流磁化特性测量与分析" . | 电工电能新技术 44 . 3 (2025) : 99-108 . |
| APA | 汪晶慧 , 范鹏 , 陈为 . 基于直流励磁的磁性元件直流磁化特性测量与分析 . | 电工电能新技术 , 2025 , 44 (3) , 99-108 . |
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Based on the finite-element analysis software Ansys Maxwell, this article proposed a simulation method for the core losses of pulsewidth modulation wave voltage excitation with dc bias which solves the problem of core losses calculation of magnetic components with different core structures in power converters. This article points out that the two key factors for core losses simulation are the magnetic properties of magnetic material and the magnetic flux density distribution inside the core. The measurement and modeling of different magnetization curves and core losses are analyzed, which are essential conditions for accurate core losses simulation. Meanwhile, a decoupling and calculation strategy for dc magnetic flux density and ac magnetic flux density peak value within the core are proposed to ensure effective implementation of core losses simulation, and the core losses can be obtained with field calculator based on an accurate core losses model. Furthermore, the article also provides a detailed analysis of the main simulation errors sources and proposes corresponding solutions. Finally, the core losses of ferrite magnetic ring and EE shaped magnetic core are analyzed and calculated using the proposed simulation method, and calculated results are compared with measurement results to verify accuracy.
Keyword ：
Accuracy Accuracy Core losses Core losses dc bias excitation dc bias excitation finite-element analysis (FEA) finite-element analysis (FEA) intrinsic magnetic properties intrinsic magnetic properties Loss measurement Loss measurement Magnetic cores Magnetic cores Magnetic flux density Magnetic flux density Magnetic hysteresis Magnetic hysteresis Magnetic separation Magnetic separation Mathematical models Mathematical models Power measurement Power measurement Voltage measurement Voltage measurement
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| GB/T 7714 | Wang, Jinghui , Yao, Haowei , Xiao, Juntao et al. Research on Core Losses Quantification Method of DC Bias Excitation Based on Finite Element Analysis [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2025 , 40 (6) : 8405-8415 . |
| MLA | Wang, Jinghui et al. "Research on Core Losses Quantification Method of DC Bias Excitation Based on Finite Element Analysis" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 40 . 6 (2025) : 8405-8415 . |
| APA | Wang, Jinghui , Yao, Haowei , Xiao, Juntao , Li, Xu , Chen, Wei . Research on Core Losses Quantification Method of DC Bias Excitation Based on Finite Element Analysis . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2025 , 40 (6) , 8405-8415 . |
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Abstract ：
The core losses quantification of magnetic components with geometrically diverse cores for power converters remains a challenge and an area of active research. By using finite element analysis software Ansys Maxwell, a simulation method for core losses calculation under PWM voltage excitation is proposed based on the modified Steinmetz equation (MSE) in this paper. The magnetic properties measurement and model of core material are specified, which are basis of core losses simulation. Furthermore, the work conducts a comprehensive error analysis to identify primary sources of simulation inaccuracies, accompanied by targeted mitigation strategies. To validate the methodology, core losses of a ferrite EE shaped core are simulated and subsequently compared with experimental measurements acquired through the DC power method. The close agreement between simulated and empirical results demonstrates the efficacy of the proposed methodology. © 2025 China Power Supply Society. All rights reserved.
Keyword ：
Computer software Computer software Coremaking Coremaking Magnetic cores Magnetic cores Magnetic devices Magnetic devices Maxwell equations Maxwell equations Pulse width modulation Pulse width modulation
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| GB/T 7714 | Fu, Zhikang , Wang, Jinghui , Xiao, Juntao et al. Simulation and Analysis of Core Losses Under High-Frequency PWM Wave Voltage Excitations [J]. | CPSS Transactions on Power Electronics and Applications , 2025 , 10 (2) : 210-219 . |
| MLA | Fu, Zhikang et al. "Simulation and Analysis of Core Losses Under High-Frequency PWM Wave Voltage Excitations" . | CPSS Transactions on Power Electronics and Applications 10 . 2 (2025) : 210-219 . |
| APA | Fu, Zhikang , Wang, Jinghui , Xiao, Juntao , Chen, Wei . Simulation and Analysis of Core Losses Under High-Frequency PWM Wave Voltage Excitations . | CPSS Transactions on Power Electronics and Applications , 2025 , 10 (2) , 210-219 . |
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Arc faults are a major cause of electrical fires. Due to the diversity of load types, existing arc fault detection (AFD) methods struggle to cover all load types, making the development of a universal detection method a significant challenge. This article presents a specially designed dual-winding sensor (DWS) that can realize self-couple on the secondary side to address the issues that existed for self-couple on the primary side. The arc fault signal characteristics of both categories, as specified in IEC 62606 and GB 14287.4, are collected and analyzed. By suppressing the low-frequency signal and amplifying the high-frequency signal under resonant conditions, a universal AFD device is designed and experimentally validated. The device is unaffected by the position of the tested wire. Results indicate that the presented method demonstrates strong universality and reduces the likelihood of false positives when detecting arc faults.
Keyword ：
Arc fault detection (AFD) Arc fault detection (AFD) Circuit faults Circuit faults Couplings Couplings diversity of load types diversity of load types dual-winding sensor (DWS) dual-winding sensor (DWS) Fault diagnosis Fault diagnosis Force Force Inductance Inductance Integrated circuit modeling Integrated circuit modeling Magnetic flux Magnetic flux self-coupling self-coupling Toroidal magnetic fields Toroidal magnetic fields Windings Windings Wire Wire
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| GB/T 7714 | Zheng, Xin , Wu, Rongjun , Huang, Hanlong et al. Universal Detection Method for Arc Faults Using Dual-Winding Sensor [J]. | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
| MLA | Zheng, Xin et al. "Universal Detection Method for Arc Faults Using Dual-Winding Sensor" . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 74 (2025) . |
| APA | Zheng, Xin , Wu, Rongjun , Huang, Hanlong , Wang, Jinghui . Universal Detection Method for Arc Faults Using Dual-Winding Sensor . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
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Abstract ：
Aiming at the problem that it is difficult to accurately measure and model the core losses of high and low frequency composite excitation, based on the detailed analysis of the limitations of the existing core losses measurement methods and core losses models, a core losses measurement system of high and low frequency composite excitation is built based on DC power method in this paper. The measurement accuracy is verified with the air-core inductor whose loss can be accurately measured. Finally, the core losses model of high and low frequency composite excitation is proposed based on the core losses model of PWM wave excitation under DC bias, and the experimental results show that the maximum relative error is −8.83%, which has high accuracy. ©2024 Chin.Soc.for Elec.Eng.
Keyword ：
Magnetic cores Magnetic cores
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| GB/T 7714 | Wang, Jinghui , Lu, Zhicheng , Chen, Wei . Research on Quantization of Core Losses of High and Low frequency Composite Excitation [J]. | Proceedings of the Chinese Society of Electrical Engineering , 2024 , 44 (10) : 4091-4102 . |
| MLA | Wang, Jinghui et al. "Research on Quantization of Core Losses of High and Low frequency Composite Excitation" . | Proceedings of the Chinese Society of Electrical Engineering 44 . 10 (2024) : 4091-4102 . |
| APA | Wang, Jinghui , Lu, Zhicheng , Chen, Wei . Research on Quantization of Core Losses of High and Low frequency Composite Excitation . | Proceedings of the Chinese Society of Electrical Engineering , 2024 , 44 (10) , 4091-4102 . |
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Abstract ：
针对高低频复合励磁磁元件磁心损耗难以精确测量和建模的问题,在详细分析现有磁心损耗测量方法和磁心损耗模型局限性的基础上,根据直流功率法测量原理搭建高低频复合励磁磁心损耗测量系统,利用损耗能精确测量的空心电感验证其测量精度.最后,基于直流偏置下脉宽调制(pulse width modulation,PWM)波励磁的磁心损耗模型,提出高低频复合励磁磁性元件的磁心损耗预测模型,并实验验证预测模型最大相对误差为-8.83%,具有较高的精度.
Keyword ：
模型 模型 直流功率法 直流功率法 磁心损耗 磁心损耗 磁滞回线 磁滞回线 高低频复合励磁 高低频复合励磁
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| GB/T 7714 | 汪晶慧 , 卢志诚 , 陈为 . 高低频复合励磁磁心损耗量化的研究 [J]. | 中国电机工程学报 , 2024 , 44 (10) : 4091-4102,中插29 . |
| MLA | 汪晶慧 et al. "高低频复合励磁磁心损耗量化的研究" . | 中国电机工程学报 44 . 10 (2024) : 4091-4102,中插29 . |
| APA | 汪晶慧 , 卢志诚 , 陈为 . 高低频复合励磁磁心损耗量化的研究 . | 中国电机工程学报 , 2024 , 44 (10) , 4091-4102,中插29 . |
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Abstract ：
This article investigates the loss measurement methods of magnetic components for power conversion applications. A comparison calorimetric method is proposed for magnetic component loss measurement, and the proposed method can eliminate measurement errors of the traditional calorimetric method. The measurement principle is introduced in detail and this method is realized, and possible sources of error in measurement are evaluated and addressed. Hysteresis control is utilized to achieve automated measurement. Resistor and air-core inductor are used to verify the accuracy of the proposed method. The results show that the proposed method can be used to measure the loss of resistor and inductive element for high frequency up to 5 MHz, and the range of loss is 0.1-10 W.
Keyword ：
Comparative calorimetric method Comparative calorimetric method core losses core losses high frequency high frequency measurement measurement
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| GB/T 7714 | Wang, Jinghui , Fan, Peng , Lin, Shuang et al. Comparative Calorimetric Method for Magnetic Component Losses Measurement With High Frequency [J]. | IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS , 2024 , 12 (5) : 5112-5122 . |
| MLA | Wang, Jinghui et al. "Comparative Calorimetric Method for Magnetic Component Losses Measurement With High Frequency" . | IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS 12 . 5 (2024) : 5112-5122 . |
| APA | Wang, Jinghui , Fan, Peng , Lin, Shuang , Huang, Fubin , Chen, Wei . Comparative Calorimetric Method for Magnetic Component Losses Measurement With High Frequency . | IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS , 2024 , 12 (5) , 5112-5122 . |
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The DC magnetization characteristics of magnetic materials are difficult to be accurately measured in a wide range. In this paper, the DC excitation method is proposed to measure the intrinsic DC magnetization curve of magnetic materials, the measuring principle is analyzed in detail and the measuring platform is built, the on-off time of the switch is controlled reasonably through the communication of the host and lower computer, the voltage and current are sampled by high-precision sampling instrument and then process the data. Based on the measurement platform, the error sources are analyzed in detail and achieve a wide range of magnetic material DC magnetization curve measurement. Finally, the feasibility and accuracy of DC excitation method are verified by using air-core inductors whose permeability is close to vacuum permeability, the DC magnetization curves of ferrite and magnetic powder cores are measured based on the established measuring platform, the DC magnetization characteristics of the two magnetic materials are compared with the measured results of large signal AC method. © 2023 IEEE.
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| GB/T 7714 | Fan, Peng , Yao, Haowei , Wang, Jinghui et al. Measurement and Research of DC Magnetization Curves Based on DC Excitation Method [C] . 2023 : 1807-1813 . |
| MLA | Fan, Peng et al. "Measurement and Research of DC Magnetization Curves Based on DC Excitation Method" . (2023) : 1807-1813 . |
| APA | Fan, Peng , Yao, Haowei , Wang, Jinghui , Tao, Shuo , Chen, Wei . Measurement and Research of DC Magnetization Curves Based on DC Excitation Method . (2023) : 1807-1813 . |
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Abstract ：
Magnetic core loss is one of the important parameters of power magnetic components. In view of the problem that AC power method has a large error in measuring the core loss at high frequency and low loss angle, as well as the disadvantages of calorimetric method, such as high time cost and tedious measurement process, DC power method is proposed. The DC method obtains magnetic core loss by measuring DC input power of inverter circuit, greatly weakening the impact of impedance angle of the measured magnetic component on measurement accuracy, and can accurately measure magnetic core loss under PWM wave excitation. This article conducts research on the following aspects: Firstly, based on the DC power method, this article measured the losses of magnetic cores under asymmetric PWM wave and symmetric PWM wave excitation, established a prediction model for magnetic core losses, and verified the accuracy of the model. Verify the existence of relaxation loss when measuring the magnetic core loss under symmetric PWM wave excitation, and establish a relaxation loss prediction model. © 2023 IEEE.
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| GB/T 7714 | Tao, Shuo , Fu, Zhikang , Wang, Jinghui et al. Study on Core Loss Model of Super High Frequency PWM Wave Excitation [C] . 2023 : 1839-1845 . |
| MLA | Tao, Shuo et al. "Study on Core Loss Model of Super High Frequency PWM Wave Excitation" . (2023) : 1839-1845 . |
| APA | Tao, Shuo , Fu, Zhikang , Wang, Jinghui , Fan, Peng , Chen, Wei . Study on Core Loss Model of Super High Frequency PWM Wave Excitation . (2023) : 1839-1845 . |
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Nowadays, it is difficult to accurately measure the core losses of magnetic components of power converter under high-frequency excitation. Based on the DC power method, this paper proposes the measuring system of core losses at l0MHz using a new wide bandgap semiconductor device GaN. The switching process of the DC/AC inverter circuit is analyzed in detail, and the loss model of the DC/AC inverter circuit is established. The measuring accuracy is verified with the air-core inductor, whose loss can be accurately measured, and the maximum relative error is 9.1%. Finally, the core losses of magnetic components under l0MHz excitation are measured based on the built measurement system. © 2022 IEEE.
Keyword ：
Electric inverters Electric inverters Electric network analysis Electric network analysis Gallium nitride Gallium nitride III-V semiconductors III-V semiconductors Magnetic cores Magnetic cores Power electronics Power electronics Pulse width modulation Pulse width modulation Semiconductor devices Semiconductor devices Wide band gap semiconductors Wide band gap semiconductors
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| GB/T 7714 | Lu, Zhicheng , Wang, Jinghui , Huang, Fubin et al. Core Losses Measurement of 10MHz PWM Excitation Based on DC Power Method [C] . 2022 : 1492-1497 . |
| MLA | Lu, Zhicheng et al. "Core Losses Measurement of 10MHz PWM Excitation Based on DC Power Method" . (2022) : 1492-1497 . |
| APA | Lu, Zhicheng , Wang, Jinghui , Huang, Fubin , Chen, Wei . Core Losses Measurement of 10MHz PWM Excitation Based on DC Power Method . (2022) : 1492-1497 . |
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