A low-loss inductor structure and design guidelines for high-frequency applications
A low-loss inductor structure and design guidelines for high-frequency applications
复制标题
高频应用的低损耗电感器结构和设计指南
DOI：
10.1109/tpel.2019.2892397
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
D. Perreault
中科院分区：
文献类型：
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作者：
Rachel S. Yang;Alex J. Hanson;B. Reese;C. Sullivan;D. Perreault
在高频范围（3-30 MHz）中的操作已经显示出使电力电子器件小型化的潜力，但是在高频下的高效小型化电感器的设计中仍然存在实质性的挑战。在这些频率下，由于趋肤和邻近效应引起的损耗难以降低，并且在芯中保持低B场所需的间隙增加了边缘场损耗。我们提出了一种低损耗电感器结构，适用于小型，高效的电感器在高频和介绍一步一步的几何设计准则。使用这些指导原则设计的示例性15 μ H电感器在3 MHz和2 A（峰值）交流电流下实现了620的实验品质因数。我们进一步证明了电感器在1-3 MHz工作的高电流摆幅功率转换器中的低损耗;与传统电感器设计相比，在250 W时，电感器将转换器效率提高了1.2%。因此，我们表明，所提出的电感器的几何形状和设计准则可以减少损耗，从而有助于实现高频小型化的电力电子设备。
Operation in the HF regime (3–30 MHz) has shown potential for miniaturizing power electronics, but substantial challenges in the design of efficient miniaturized inductors at HF remain. At these frequencies, losses due to skin and proximity effects are difficult to reduce, and gaps needed to keep B fields low in the core add fringing field loss. We propose a low-loss inductor structure suitable for small, highly efficient inductors at HF and introduce step-by-step design guidelines for the geometry. An example ∼ 15 μΗ inductor designed using these guidelines achieved an experimental quality factor of 620 at 3 MHz and 2 A (peak) of ac current. We further demonstrate the low loss of the inductor in a high-current-swing power converter operated at 1–3 MHz; at 250 W, the inductor improved converter efficiency by 1.2 %, compared to a conventional inductor design. Thus, we show that the proposed inductor geometry and design guidelines can reduce losses and thereby help realize high frequency miniaturization of power electronics.