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http://dx.doi.org/10.6113/JPE.2013.13.3.339

Analysis and Design of Coupled Inductors for Two-Phase Interleaved DC-DC Converters  

Lee, Jong-Pil (Power Conversion & Control Research Center, KERI)
Cha, Honnyong (School of Energy Eng., Kyungpook National University)
Shin, Dongsul (Dept. of Electrical Eng., Pusan National University)
Lee, Kyoung-Jun (Dept. of Electrical Eng., Pusan National University)
Yoo, Dong-Wook (Power Conversion & Control Research Center, KERI)
Yoo, Ji-Yoon (Dept. of Electrical Eng., Korea University)
Publication Information
Journal of Power Electronics / v.13, no.3, 2013 , pp. 339-348 More about this Journal
Abstract
Multiphase dc-dc converters are widely used in modern power electronics applications due to their advantages over single-phase converters. Such advantages include reduced current stress in both the switching devices and passive elements, reduced output current ripple, and so on. Although the output current ripple of a converter can be significantly reduced by virtue of the interleaving effect, the inductor current ripple cannot be reduced even with the interleaving PWM method. One way to solve this problem is to use a coupled inductor. However, care must be taken in designing the coupled inductor to maximize its performances. In this paper, a detailed analysis of a coupled inductor is conducted and the effect of a coupled inductor on current ripple reduction is investigated extensively. From this analysis, a UU core based coupled inductor structure is proposed to maximize the performance of the coupled inductor.
Keywords
Coupled inductor; Interleaved PWM; Multiphase converter; Transformer;
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