{"title":"Study on Amplitude and Frequency Characteristics of Magnetic Flux in Three-Dimensional Wound Core Transformer","authors":"Z. H. Su, L. F. Luo, D. Z. Chen","doi":"10.1049/pel2.70021","DOIUrl":null,"url":null,"abstract":"<p>In order to deeply study the mathematical model and amplitude-frequency characteristics of the split-frame flux and composite flux of a three-dimensional wound core transformer. Firstly, based on the phasor relationship between the composite flux and the split-frame flux, this paper obtains the constraint equation between the composite flux and the split-frame flux. Based on Ohm's law for magnetic circuits, the constraint equation between the three-phase frame fluxes are derived, and the analytical solution of each split-frame flux is obtained by solving it. Secondly, combined with the characteristics that the flux distribution in the magnetic circuit always realizes the minimum magnetic resistance, starting from the relationship between the harmonic content, initial phase angle and the amplitude of the composite flux in the analytical solution of the split-frame flux, a calculation method for the harmonic content of the split-frame flux and the amplitude of the composite flux of a three-dimensional wound core transformer based on the multivariate function method is proposed. The harmonic content of the split-frame flux and the amplitude of the composite flux under excitation of an infinite power system and a small power system is clarified, and its typical applications are discussed. Finally, a test platform for a three-dimensional wound core transformer capable of realizing the presence or absence of zero-sequence flux components in each frame flux is built and relevant tests are carried out to verify the correctness of the proposed method.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70021","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IET Power Electronics","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1049/pel2.70021","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
In order to deeply study the mathematical model and amplitude-frequency characteristics of the split-frame flux and composite flux of a three-dimensional wound core transformer. Firstly, based on the phasor relationship between the composite flux and the split-frame flux, this paper obtains the constraint equation between the composite flux and the split-frame flux. Based on Ohm's law for magnetic circuits, the constraint equation between the three-phase frame fluxes are derived, and the analytical solution of each split-frame flux is obtained by solving it. Secondly, combined with the characteristics that the flux distribution in the magnetic circuit always realizes the minimum magnetic resistance, starting from the relationship between the harmonic content, initial phase angle and the amplitude of the composite flux in the analytical solution of the split-frame flux, a calculation method for the harmonic content of the split-frame flux and the amplitude of the composite flux of a three-dimensional wound core transformer based on the multivariate function method is proposed. The harmonic content of the split-frame flux and the amplitude of the composite flux under excitation of an infinite power system and a small power system is clarified, and its typical applications are discussed. Finally, a test platform for a three-dimensional wound core transformer capable of realizing the presence or absence of zero-sequence flux components in each frame flux is built and relevant tests are carried out to verify the correctness of the proposed method.
期刊介绍：
IET Power Electronics aims to attract original research papers, short communications, review articles and power electronics related educational studies. The scope covers applications and technologies in the field of power electronics with special focus on cost-effective, efficient, power dense, environmental friendly and robust solutions, which includes:
Applications:
Electric drives/generators, renewable energy, industrial and consumable applications (including lighting, welding, heating, sub-sea applications, drilling and others), medical and military apparatus, utility applications, transport and space application, energy harvesting, telecommunications, energy storage management systems, home appliances.
Technologies:
Circuits: all type of converter topologies for low and high power applications including but not limited to: inverter, rectifier, dc/dc converter, power supplies, UPS, ac/ac converter, resonant converter, high frequency converter, hybrid converter, multilevel converter, power factor correction circuits and other advanced topologies.
Components and Materials: switching devices and their control, inductors, sensors, transformers, capacitors, resistors, thermal management, filters, fuses and protection elements and other novel low-cost efficient components/materials.
Control: techniques for controlling, analysing, modelling and/or simulation of power electronics circuits and complete power electronics systems.
Design/Manufacturing/Testing: new multi-domain modelling, assembling and packaging technologies, advanced testing techniques.
Environmental Impact: Electromagnetic Interference (EMI) reduction techniques, Electromagnetic Compatibility (EMC), limiting acoustic noise and vibration, recycling techniques, use of non-rare material.
Education: teaching methods, programme and course design, use of technology in power electronics teaching, virtual laboratory and e-learning and fields within the scope of interest.
Special Issues. Current Call for papers:
Harmonic Mitigation Techniques and Grid Robustness in Power Electronic-Based Power Systems - https://digital-library.theiet.org/files/IET_PEL_CFP_HMTGRPEPS.pdf
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