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sexta-feira, 17 de julho de 2026

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.

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quinta-feira, 2 de julho de 2026

Implementation of Energy based Hysteresis Model in LTspice for power electronics applications Fabien Sixdenier, Riccardo Scorretti, Vittorio Bertolini, Antonio Faba-Universite Claude Bernard Lyon INSA Lyon, Ecole Centrale de Lyon, France † University of Perugia, Italy


 Implementation of Energy based Hysteresis Model in LTspice for power 1 electronics applications Fabien Sixdenier∗, Riccardo Scorretti∗†, Vittorio Bertolini†, Antonio Faba†
 

Abstract—Circuit simulation software is routinely used in power electronics to analyze systems with magnetic cores exhibiting significant hysteresis behavior. This paper presents the implementation of the Energy-Based Hysteresis Model (EBHM) in LTspice to account for hysteresis in magnetic cores of inductors. The model is validated via transient simulations of a DC/DC buck converter, comparing results with experimental measurements across various input voltages, frequencies, and duty cycles. While the model accurately predicts average current, discrepancies in current ripple are observed, attributed to core-to-core variability in ferrite materials. The EBHM implementation offers a significant computational advantage, with simulation times remaining under 10 seconds even for highly saturated cases. The model’s robustness and potential for extension to dynamic effects (e.g., eddy currents) are discussed, along with its applicability to other power electronics topologies.

Study of a High-Power Medium Frequency Transformer Using Amorphous Magnetic Material by Shichong Zhang,Dezhi Chen * and Baodong Bai- School of Electrical Engineering, Shenyang University of Technology, Shenyang 110027, China


 

Study of a High-Power Medium Frequency Transformer Using Amorphous Magnetic Material by Shichong ZhangORCID,Dezhi Chen * andBaodong Bai School of Electrical Engineering, Shenyang University of Technology, Shenyang 110027, China

Abstract A shell-type medium frequency transformer (MFT) using amorphous alloy material is designed for high-power electronic applications. The optimal area product design method is adopted to design an MFT, which maximizes the high efficiency and power density, minimizes the loss and volume, and meets the limitations of insulation and temperature rise. Then, a 20 kVA/10 kHz MFT is designed. To ensure the rationality of the MFT design, the magnetic properties of the amorphous alloy material are measured, and finite element simulations are carried out based on measured magnetic properties. The magnetic flux density, loss, and temperature rise of the designed MFT are analyzed. Finally, a 20 kVA/10 kHz MFT prototype is fabricated, and experimental tests are carried out. The loss and temperature rise of the MFT prototype are within reason, which verifies the effectiveness of the proposed scheme. 

READ FULL ARTICLE:https://www.mdpi.com/2073-8994/14/10/2129