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  • 學位論文

具均流控制之數位化相移全橋轉換器並聯系統研製

Design and Implementation of Digital-Controlled Parallel Phase-Shift Full-Bridge Converter with Current Sharing Control

指導教授 : 賴炎生
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摘要


本篇論文主要是研製一數位化多模組並聯之直流/直流相移全橋轉換器,其利用相移控制方式,使轉換器開關達到零電壓導通特性,進而減少開關上的切換損失,且為了提高效率,變壓器二次側採用電流倍增架構。其次本文採用主僕式控制雙模組並聯架構搭配電流命令補償技術,以達到均流控制。 本文採用德州儀器公司所產的數位信號處理TMS320F28035 為控制平台,所研製的電路詳細規格包含輸入直流電壓400V、輸出電壓48V,兩級轉換器總額定功率為1000W,開關切換頻率為100kHz。由實驗結果證實,半載下,最高效率可達到90.72%以上,且可達到均流控制,由以上結果驗證設計與實驗的正確性。

並列摘要


The objective of this thesis is to design and implement a paralleled DC/DC phase-shift full-bridge converter with ZVS-on feature. ZVS-on feature is achieved by phase shift modulation and thereby increasing the efficiency. Due to efficiency improvement, current doubler rectifier is used on the secondary side of converter. The paralleled DC/DC phase-shift full-bridge converter is with master-slave control. Current command compensation technique is used to achieve current sharing control. The digital signal processor, TMS320F28035, is used as the controller for the verification of design and implementation. The design specifications include: input DC voltage is 400 V, output voltage is 48 V, total power rating is 1000 W, switching frequency is 100 kHz. Simulation and experimental results show that the maximum efficiency is up to 90.72% under half load condition and current sharing control of each converter can be achieved. These results confirm the design and implementation.

參考文獻


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