Switching Power Supplies with Ferrite Inductors in Sustainable Saturation Operation
Switching Power Supplies with Ferrite Inductors in Sustainable Saturation Operation
复制标题
在可持续饱和运行中使用铁氧体电感器的开关电源
DOI：
10.1016/j.ijepes.2017.06.003
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发表时间：
2017
影响因子：
5.2
通讯作者：
Kateryna Stoyka
中科院分区：
文献类型：
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作者：
G. D. Capua;N. Femia;Kateryna Stoyka
本文研究了开关模式电源 (SMPS) 中铁氧体磁芯功率电感器 (FCPI) 的可持续饱和操作 (SSO)。如果铁氧体电感器的电流纹波、功率损耗和温升对于器件和 SMPS 来说都是可接受且可靠的，则在 SSO 中考虑使用铁氧体电感器，尽管电感下降是由磁芯饱和决定的。讨论了一种算法，该算法根据有关允许的功率损耗、温升和电感器峰峰值电流纹波的 SMPS 规范，识别具有最小尺寸和体积的符合 SSO 的 FCPI。与 465 kHz/3.3 V/1.5 A 降压转换器相关的实验结果表明，符合 SSO 的电感器可以提高 SMPS 功率密度，同时保持整体转换器效率。尽管提出了低功率应用，但与部分饱和中功率电感器的利用相关的发现具有一般概念价，并且可以针对几千瓦输出功率 DC/DC 转换器前瞻性地重新评估类似的研究。
This paper investigates the Sustainable Saturation Operation (SSO) of Ferrite Core Power Inductors (FCPIs) in Switch Mode Power Supplies (SMPSs). A ferrite inductor is considered in SSO if its current ripple, power losses and temperature rise are acceptable and reliable for both the device and the SMPS, despite the inductance drop determined by the core saturation. An algorithm is discussed, which identifies SSO-compliant FCPIs with minimum size and volume, given the SMPS specifications about the allowed power losses, temperature rise and peak-to-peak current ripple of the inductor. The experimental results relevant to a 465 kHz/3.3 V/1.5 A buck converter show that SSO-compliant inductors allow to increase the SMPS power density, while preserving the overall converter efficiency. Despite the proposed low power application, the findings relevant to the utilization of power inductors in partial saturation have general conceptual valence and similar investigations can be prospectively re-assessed for few kW output power DC/DC converters.