Effects of Flat-Core Geometry on Magnetic Flux Distribution and Thermal Behavior in Integrated Transformers for High-Frequency LLC Converters- Journal of Electrical Engineering & Technology-BY-Jun-Taek Oh · Taek-Keun Jung · Jong-Soo Kim

 

Effects of Flat-Core Geometry on Magnetic Flux Distribution and Thermal Behavior in Integrated Transformers for High-Frequency LLC Converters Jun-Taek Oh1 · Taek-Keun Jung1 · Jong-Soo Kim1 Received: 18 November 2025 / Revised: 12 April 2026 / Accepted: 27 April 2026 / Published online: 22 May 2026

 © The Author(s) under exclusive licence to The Korean Institute of Electrical Engineers 2026

 Abstract This study investigates the thermal behavior of an integrated transformer structure that incorporates a flat core to expand the flux-sharing area. Using electromagnetic analysis based on Ansys Maxwell, the characteristics of magnetic flux distribution and core temperature rise are analyzed, and the magnetic flux density and thermal behavior are compared according to the presence of the resonant inductor core and variations in flat-core thickness. In addition, the characteristics of flux overlap and saturation according to the direction of flux flow are analyzed. Based on these analyses, an optimized integrated transformer design is proposed to effectively mitigate heat generation and magnetic flux saturation. To verify the feasibility of this design, a 500-kHz LLC resonant converter prototype was built, and experiments were conducted at approximately 3.1 kW in the resonant frequency region. The results show that the optimized design reduces core temperature rise by up to 95.8 °C compared with a conventional design that does not consider flat-core thickness and integrated transformer geometry, while also improving overall system efficiency by 0.7%. These findings demonstrate the effectiveness of the flat-core-based integrated transformer design in high-frequency, high-power-density power conversion systems and highlight its potential applicability to future highly integrated power electronic systems.

VIEW ORIGINAL  FULL ARTICLE : https://link.springer.com/article/10.1007/s42835-026-02795-9

ALTERNATIVE LINK :https://www.mediafire.com/file/u2r54j2fkjxipqb/s42835-026-02795-9.pdf/file

WEBINAR From Grid Following GFL to Grid Forming GFL (Spanish Audio)-Dr.Francisco Gonzalez-Longatt -IEE-UNMSM

 

 

Title: From Grid Following to Grid Forming Converters Webinar, 2nd April 2026, 5:10 PM (Peru time).

 Abstract Power Electronic converters (PECs) have been in power systems for many decades; however, it is only recently that they have come to account for a significant share of generation, transmission, and demand. PEC has dramatically changed in recent times, from a very limited support role in power system operation to a key element in the transition to a zero-carbon society. The early developments in high-voltage direct current (HVDC) based on Thyristors were a formidable step forward for bulk power transmission. However, the development of more flexible commutation devices and sophisticated control mechanisms, together with appropriate practices and grid codes, is making voltage source converter (VSC)-interfaced technologies a crucial component of modern and future power system operations and paving the way for a secure transition to a zero-carbon society. This short seminar provides a general introduction to power electronic converters and their transition from grid-following to grid-forming, including practical discussions of the importance of several elements and the control philosophy. The seminar includes (but is not limited to) discussing the benefits of a smart grid-friendly converter.

RADIATION TOLERANT POWER ELECTRONICS FOR SPACE APPLICATIONS Doctoral Thesis Jaroslav Laifr Prague, November 2018-Czech Technical University in Prague Faculty of Electrical Engineering Department of Measurement

RADIATION TOLERANT POWER ELECTRONICS FOR SPACE APPLICATIONS Doctoral Thesis Jaroslav Laifr Prague, November 2018 

Abstract: The aim of this thesis is to summarize the state-of-the-art satellite electronics design, find its bottlenecks and propose a novel, scientific-based approaches on the space power systems development addressing rapidly evolving so-called "NewSpace" ecosystem. The modern consumer-driven electronics with rising computational power and miniaturization demands similar to the Moore's Law for computers brings new technological challenges and problems. The NewSpace community needs to understand them to successfully conduct its presence in space, both aboard earth-orbiting and interplanetary missions. It is the satellite (manned and unmanned) and aerospace industry, private or government-led institutions which need to follow the technological and scientific progress by faster steps if want to utilize the full potential of the scientific and technological progress in commercially available markets and technological breakthroughs. Initial studies are the follow-up of the author's Master thesis: Fluxgate Magnetometer for Satellite Attitude Control, carried on within the multi-faculty CubeSat project CzechTechSat led by the author as the Principal Investigator. Students were implementing authors' hypotheses within their bachelor and master thesis terms and supported their research and validation. Key findings were implemented as an practical example of the thesis utilization within the Low Voltage Power Supply unit for the Radio and Plasma Waves Investigation instrument selected to be flown aboard the European Space Agency L-Class mission called JUICE (Jupiter Icy Moon Explorer) into the Jovian system in 2023. Also in the project CRREAT by the realization of the ultra low power dosimeter for small satellites. The thesis is also a base of the spacecraft electronics design E-Book called "NewSpace Economically" prepared to be released to the small satellite community in 2019. Keywords: ESA, RPWI, JUICE, CubeSat, NewSpace, Radiation, Power Supply, Satellite.

ORIGINAL LINK : 

https://dspace.cvut.cz/bitstreams/f1967e19-960c-4e34-9a18-6039da3b856d/download

ENLACE ALTERNATIVO : https://www.mediafire.com/file/6k4gywmdvanik6c/F3-D-2019-Laifr-Jaroslav-Jaroslav_Laifr_Doctoral_Thesis.pdf/file

PROJETO DO CIRCUITO RESONANTE TESTE DE POTENCIA E TESTE DE CURTOCIRCUITO

 

ENGENHEIRO XIAOSHAN LAOSHOU EXPLICA PASO A PASO DEL TESTE DE POTENCIA E TESTE DE CURTOCIRCUITO.

PROYECTO DE INVERSOR RESONANTE-PARTE2