以數位訊號處理器實現具有相移與零電壓切換之全橋轉換器

Design and Implementation of a Novel Phase-Shift and Zero Voltage Switching Full-Bridge Converter by Using DSP

林建億(Jian-Yi Lin)

指導教授 ： 黃明熙

國立臺北科技大學/電資學院/電力電子產業研發碩士專班/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00047

摘要

本篇論文主要是以全橋相移轉換器為主要電路架構並且透過數位訊號處理器(TMS320LF2407)來控制相移的動作順序，以達到零電壓切換的效果。
由於全橋電路架構適用在高功率應用場合，通常為了提高功率密度進而增加切換頻率，但伴隨而來的是切換損失的增加，降低整體的轉換效率，同時產生散熱及電磁干擾等問題；為了解決上述問題，採用相移方式來達到零電壓切換，如此可有效降低切換損失，提高轉換效率以及功率密度。
文中先對電路架構做詳細介紹以及分析其動作原理，接著介紹DSP微處理器的發展與應用，其次運用MATLAB內的SIMULINK模擬一個輸入50~80 V，輸出為200 V/1 kW的全橋相移轉換器；最後，根據模擬規格，實際研製ㄧ台直流電源轉換器，並量測相關波形與數據以驗證推導與模擬的正確性。
(本論文作品實際上有應用在數位控制太陽能發電系統，當作電源穩壓器使用。)

關鍵字

全橋相移轉換器 ； 零電壓切換 ； 數位訊號處理器 ； SIMULINK

並列摘要

The purpose of this thesis is to realize the zero-voltage switching dc-to-dc converter using phase-shift full-bridge control structure. In which , the phase-shift scheme is fully digitally implemented in a DSP-based control environment which is constructed using a DSP TMS320LF2407.
As generally recognized, a full-bridge converter with proper design can possess higher power density by increasing the switching frequency of power transistor. However, owing to the high switching loss of power transistor, the energy conversion efficiency is reduced. The thermal and EMI effects also become worse. In order to solve these problems, a phase-shift scheme is proposed to achieve zero-voltage switching.
In performing the analysis and design of the constituted components in a zero-voltage switching converter, the operating characteristics are studied first. Then a simulink-based simulation environment is constructed. Finally, a converter with 50 to 80V input and 200V, 1 kW output is realized by a fully digitally phase-shift converter using DSP-based controller. Some experimental results are provided to verify the correctness of the proposed schemes.

並列關鍵字

Phase-Shift Full Bridge Converter ； Zero-Voltage Switching ； Digital Signal Processor ； SIMULINK

參考文獻

[21] 鄒鈺瑞，具有同步整流與電流倍增電路之全橋相移直流轉換器的研製，碩士論文，國立台北科技大學電機工程系研究所，台北，民國94年。

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