Analysis of the efficiency characteristics of an LLC resonant converter having a current doubler rectification circuit

Lee, Dong Hoon; Shin, Jung Yoon; Hwang, Soon Sang; Lim, Byung Kuk; Kim, Hag-Wone

doi:10.1109/icems.2015.7385082

Cited by 6 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, these methods cannot perfectly solve the fundamental problem of power imbalance, which is attributable to complex circuits or control and the difference among elements. Another method used a single multiple-input transformer to solve the problem of power imbalance [8]. However, this method cannot also solve the problem of increasing volume due to the heat concentrated in the transformer.…”

Section: Introductionmentioning

confidence: 99%

“…This study proposes a new In this way, the efficiency was improved and the volume was minimized. Moreover, to solve the problem of miniaturization, converters with the same module were connected by input serial and output parallel (ISOP) topology [3][4][5][6][7][8][9]. However, this method may cause a problem of power imbalance between equivalent modules connected by ISOP.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Power Balance Method using Coupled Shunt Inductor and Multiple-Input Transformer for ISOP LLC Converter

Hwang¹,

Baek

Kim

2019

Electronics

View full text Add to dashboard Cite

High-capacity power-supply systems using a large input voltage typically improve efficiency and can be miniaturized by dividing the input voltage into multiple small voltages, thereby minimizing the stress on the switching element and thus materializing a fast switching function. When a large input voltage is divided into small voltages in series through a DC link capacitor, power is supplied to each converter and the power of each LLC (Inductor-Inductor-Capacitor) converter can be divided and converted. However, such LLC converters, which are configured by the division of the input voltage, have power imbalance due to the parameter variation between active and passive elements of the power board, which results in an increase in the stress and heat of a particular element. As this problem of power balance necessitates a design for securing a power margin and as the heated element increases its volume, the efficiency and reliability of the LLC converter are degenerated. Accordingly, this study attempted to solve the problem of the power imbalance of LLC converters at each level using a coupled shunt inductor and multiple-input transformers sharing magnetic coupling.

show abstract

Section: Introductionmentioning

confidence: 99%