Multi-phase interleaved LLC-SRC and its digital control scheme

Yeon, Jae-Eul; Kang, Wonseok; Cho, Kyu-Min; Ahn, Tai Young; Kim, Hee‐Jun

doi:10.1109/speedam.2010.5542047

Cited by 18 publications

(3 citation statements)

References 5 publications

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“…The double-phase interleaving LLC with 90°phase-shift control method has appeared in several literature works [11]- [16] as a good candidate to manage high-power applications. The method described in the above papers is to operate both the two phases at the same frequency with one same controller driver, but with a phase shift of 90°between adjacent cells to get an output current with fewer ripples.…”

Section: A Traditional Phase-shift Control Llc and Its Current Sharimentioning

confidence: 99%

Double-Phase High-Efficiency, Wide Load Range High- Voltage/Low-Voltage <italic>LLC</italic> DC/DC Converter for Electric/Hybrid Vehicles

Yang

Dubus

Sadarnac

2015

IEEE Trans. Power Electron.

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International audienceIn this paper, a 2.5-kW 330–410-V/14-V, 250-kHz dc/dc converter prototype is developed targeted for electric ve-hicle/hybrid vehicle applications. Benefiting from numerous ad-vantages brought by the LLC resonant topology, this converter is able to perform high efficiency, high power density, and low EMI. To arrange high-output current, this paper proposes a parallel-connected LLC structure with developed novel double-loop control to realize an equal current distribution and an overall efficiency improvement. Considering the LLC cell's dimensioning, this paper establishes a more precise model by taking the secondary leak-age inductance into consideration. System amelioration and design considerations of the developed LLC are also presented in this pa-per. A special transformer is presented, and various types of power losses are quantified to improve its efficiency. This converter also implements synchronous rectification, power semiconductor mod-ule, and an air-cooling system. The power conversion performance of this prototype is measured and the developed prototype attains a peak efficiency of 95% and efficiency is higher than 94% from 500 W to 2 kW, with a power density of 1 W/cm 3 . Finally, the EMC results of this prototype are also measured and presented

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Section: A Traditional Phase-shift Control Llc and Its Current Sharimentioning

confidence: 99%

Double-Phase High-Efficiency, Wide Load Range High- Voltage/Low-Voltage <italic>LLC</italic> DC/DC Converter for Electric/Hybrid Vehicles

Yang

Dubus

Sadarnac

2015

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…With interleave operation, the size of the input and output filters can be reduced, and also the efficiency improvement is attractive for medium‐ to high‐power applications. Multi‐phase or interleaved isolated dc–dc converters are introduced in [1–9]. The similarities and the differences between two soft‐switched three‐phase dc–dc converters with inductive output filters, one with three‐phase legs (V3) and the other with six legs (V6), are presented in [1].…”

Section: Introductionmentioning

confidence: 99%

“…A multi‐phase topology of the dc‐to‐dc series‐resonant converter (SRC) using variable frequency control [4] was formed by connecting the rectifier outputs of the SRCs in parallel and switching these converters at different phase angles. A three‐phase interleaved LLC resonant dc–dc converter is realised in [6] by connecting the rectifier outputs of the six SRCs in parallel, and each converter operates with a phase difference of π /3 and used variable frequency control.…”

Section: Introductionmentioning

confidence: 99%