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

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.

A Review of Non-Isolated High Step-Down Dc-Dc Converters

“…Copyright ⓒ 2015 SERSC Buck converts with coupled inductor and extended duty ratio is shown in Figure 17 [44]. This is a four phase interleaved buck convert with inductors of four phases coupled with each other.…”

High Gain Boost Interleaved Converters with Coupled Inductors and with Demagnetizing Circuits

“…For that reason, perspective topological modification has been made. Most of the proposals are focused on the optimization of the voltage gain ratio in the pursuit of duty cycle improvement [1][2][3][4][5]. Many single-stage high voltage gain converters have been developed [6][7][8][9][10] with Figure 1 shows the dual interleaved DC-DC boost converter with magnetically coupled inductors.…”

2-Phase Bidirectional Non-Inverting Buck-Boost Converter using Coupled Inductor

“…그러나 이로 인해 인덕터 전류 리플 ( ∆   , ∆   )은 증가하는 단점을 가진다. [2] 이러한 단점은 결합 인덕터를 사용하여 해결할 수 있다. 결합 인덕터를 사용 한 다상 DC-DC 컨버터는 비결합 인덕터를 사용했을 때 보다 더 작은 인덕터 전류 리플을 가진다.…”