48V／380V LLC雙向直流／直流轉換器之研製

Realization study of 48V/380V LLC Bi-directional DC/DC converter

黃博原(Po-Yuan Huang)

指導教授 ： 謝冠群 ； 謝宏毅

中原大學/電機資訊學院/電機工程研究所/碩士(2020年)

https://doi.org/10.6840/cycu202000348

摘要

本文旨在開發一種全橋LLC雙向直流/直流諧振轉換器，該轉換器能夠雙向轉換進行升壓和降壓充電。兩個儲能槽由電池組成，分別設置在高壓側和低壓側直流母線上。降壓或升壓模式的能量轉移取決於電池容量對負載消耗的需求。本研究採用德州儀器（TI）的UCC25600，其控制方式為脈衝頻率調變，諧振轉換器可以實現零電壓切換，進而提高系統效率。最後實驗做出一部1kW 48V/380V全橋LLC雙向直流/直流轉換器來探討此架構的特性，經過實測結果來驗證其功能及適用性。實驗結果證實:升壓模式最高轉換效率為94.89%；降壓模式最高轉換效率為94.37%。

關鍵字

雙向轉換器 ； 全橋LLC ； 零電壓切換

並列摘要

This thesis aims to develop a bi-directional full-bridge LLC DC/DC resonant converter, which is capable of boost and buck charging behaviors for bi-directional conversion. The two energy storage tanks are formed by batteries, separately set at high-side and low-side DC buses. Energe transfer through buck or boost mode is dependent on the demand of battery capacity on load comsumption. This research uses UCC25600 of Texas Instruments as controller by pulse frequency modulation, and the resonant convertercan achieve zero voltage switching to improve system efficiency. Finally, a 1 kW 48V/380V full-bridge LLC bidirectional DC/DC converter was implemented to verify its feasibility. Experimental results show the highest conversion efficiencies are 94.89% in boost mode and 94.37%in buck mode, respectively.

並列關鍵字

Bidirectional converter ； Full-bridge LLC ； Zero-voltage switching

參考文獻

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