应用于感应设备的 PCB 线圈中接近损耗均质化技术的性能评估

IF 1.1 4区 工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC
Alexis Narváez, Claudio Carretero, Jesús Acero
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引用次数: 0

摘要

能源效率是电感功率元件优化设计的首要目标。这一目标与尽量减少线圈中的功率损耗完全一致。通常情况下,线圈采用绕线法制造,但最近,由于印刷电路板(PCB)结构具有外形小巧、易于制造等优点,其使用已变得越来越普遍。在磁性电源设备的工作频率下,需要使用litz结构的多导体布线来降低损耗。PCB 损耗优化程序包括确定轨道的数量和尺寸。数值模拟是获取磁性器件参数的有力工具。然而,将多轨道布线的内部结构纳入数值模拟意味着计算成本非常高,而且结果的准确性也很低,因为轨道的尺寸非常小。为了克服这一困难,我们采用了布线均质化技术,不考虑内部结构,通过计算模拟确定系统中的磁场及其电气等效。线圈损耗则根据布线和周围场的特性进一步确定。前述程序已被证明适用于由圆形截面的股线组成的电缆,但应进行调整以适用于矩形截面的轨道。本文提出并评估了适用于 PCB 线圈的不同均质化技术。本文选择了一个高度对称的参考系统,以降低数值建模的计算成本,但得出的结论可适用于更复杂的几何形状,而不会丧失一般性。最后,通过与实验结果的比较,验证了不同均质化技术的结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance evaluation of homogenization techniques for proximity losses in PCB coils applied to inductive devices
Energy efficiency is the primary objective in optimal design of inductive power components. This goal is totally aligned with the minimization of power losses in the coils. Typically, coils have been constructed by wire winding but, more recently, the utilization of printed circuit board (PCB) constructions has become more common due to their advantages, i. e. low profile and ease of fabrication, among others. At the operating frequencies of magnetic power devices, multi-conductor cabling with litz structure is required to reduce losses. PCB loss optimization procedure involves determining the number and size of the tracks. Numerical simulation is a very powerful tool to obtain the parameters of magnetic devices. However, including the internal structure of multi-track wiring in the numerical simulation implies a very high computational cost and a low accuracy of the results, because the size of the tracks is very small. Techniques of homogenization of the cabling are used to overcome such difficulty, disregarding the internal structure in order to determine the fields in the system and their electrical equivalent by means of computational simulation. The coil losses are further determined on the basis of the characteristics of the cabling as well as of the surrounding fields. The preceding procedure has proven to be suitable for cables composed of strands of circular cross-section, but should be adjusted to apply to tracks of rectangular cross-section. In this paper, different homogenization techniques for PCB coils have been proposed and evaluated. A highly symmetric reference system is selected to reduce the computational cost of numerical modeling, but the conclusions can be applied to more complicated geometries without loss of generality. Finally, the results of the different homogenization techniques have been validated by comparison with experimental results.
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来源期刊
CiteScore
1.70
自引率
0.00%
发文量
100
审稿时长
4.6 months
期刊介绍: The aim of the International Journal of Applied Electromagnetics and Mechanics is to contribute to intersciences coupling applied electromagnetics, mechanics and materials. The journal also intends to stimulate the further development of current technology in industry. The main subjects covered by the journal are: Physics and mechanics of electromagnetic materials and devices Computational electromagnetics in materials and devices Applications of electromagnetic fields and materials The three interrelated key subjects – electromagnetics, mechanics and materials - include the following aspects: electromagnetic NDE, electromagnetic machines and devices, electromagnetic materials and structures, electromagnetic fluids, magnetoelastic effects and magnetosolid mechanics, magnetic levitations, electromagnetic propulsion, bioelectromagnetics, and inverse problems in electromagnetics. The editorial policy is to combine information and experience from both the latest high technology fields and as well as the well-established technologies within applied electromagnetics.
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