On the Multiscale Landau–Lifshitz–Gilbert Equation: Two-Scale Convergence and Stability Analysis

Chen, Jingrun; Du, Rui; Ma, Zetao; Sun, Zhiwei; Zhang, Lei

doi:10.1137/21m1438177

Cited by 1 publication

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To produce accurate simulation results, models must work together. Based on the simplified Landau-Lifshitz-Gilbert equation, Tanaka H and Yan Peng et al [21,22] obtained the hysteresis model of the LLG equation describing the magnetization dynamics. The model has a clear physical meaning, few parameters, and simple identification.…”

Section: Introductionmentioning

confidence: 99%

Parameter Design of a Self-Generated Power Current Transformer of an Intelligent Miniature Circuit Breaker Based on COMSOL

Wang,

Chang,

Han

et al. 2024

Electronics

View full text Add to dashboard Cite

With the deep penetration of renewable energy and power electronic equipment, the overcurrent protection of an intelligent miniature circuit breaker faces new challenges. The electronic controller of an intelligent miniature circuit breaker is typically powered by the bus current rather than the phase voltage to ensure a robust overcurrent protection response under all conditions, including severe short-circuit faults. So, the performance of the current transformer serving as an energy harvesting unit and the corresponding direct current to direct current convention circuit is one of the critical issues due to the limited volume of an intelligent miniature circuit breaker. In this research, a finite element model of a current transformer for an intelligent miniature circuit breaker is constructed by COMSOL to evaluate the impact of the core material, the core size, and the number of coil turns on the energy harvesting capability of the current transformer. Meanwhile, the relationship between the output of the power supply and its design parameters is investigated by circuit simulation. As a result, a novel type of current transformer is proposed based on well-designed parameters. Finally, experimental tests have been conducted to verify the hysteresis characteristics, output characteristics, and energy harvesting effect. The results demonstrate that the hysteresis properties of the transformer align with the simulation results. The power supply can work with a minimum current of 8 amperes, which is 23.08% better than before.

show abstract

Section: Introductionmentioning

confidence: 99%