具有零電壓切換之相移全橋轉換器的研製

Design and Implementation of Full-Bridge Phase Shift Converter with Zero-Voltage Switching

吳信昌(Shin-Chang Wu)

指導教授 ： 賴炎生

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(2008年)

https://doi.org/10.6841/NTUT.2008.00007

摘要

本論文主要研製一具有零電壓切換相移式全橋轉換器，並且藉由相移式脈波寬度調變技術達到零電壓切換。本文使用UCC3895作為脈波寬度調變控制器，利用相移之信號時序，調變工作週期，使轉換器的功率開關元件工作在零電壓切換，進而減少於功率開關元件上切換損失，提高轉換器的效率。本論文並對相移式全橋轉換器，建立小信號等效模型，再利用等效模型推導其輸出電壓與責任週期的轉移函數，據此設計轉換器的補償器，提昇其穩定性。
本文所研製之相移式全橋轉換器的規格如下：
額定功率： 360瓦
輸入電壓： 200伏
輸出電壓： 12伏
輸出電流： 30安培
切換頻率： 100 kHz
實驗結果顯示，本文實際設計的轉換器，其最高效率可達在87％以上而且功率開關元件具有零電壓切換的特性，驗證控制與設計的正確性。

關鍵字

相移全橋轉換器 ； 零電壓切換

並列摘要

The objective of this thesis is to design and implement full-bridge phase-shift converter with zero-voltage switching. Zero-voltage switching is achieved by phase shift modulation.
In this thesis, the small-signal model of full-bridge phase-shifted converter is derived. By the small-signal model, the transfer function of output voltage to duty cycle is derived. The compensator for the converter is designed based upon the derived transfer function.
A full-bridge phase-shift converter has been designed and implemented. The specifications of this converter are as follows: input voltage = 200 V/DC, output voltage = 12 V/DC, output current = 30A, switching frequency = 100 kHz and output power = 360 W.
Experimental results show that the maximum efficiency is 87%. These results verify the theoretical analysis, design and implementation.

並列關鍵字

Full-Bridge Phase-Shift Converter ； Zero Voltage Switching

參考文獻

[17] 張鎮東，相移全橋直流轉換器之研製，碩士論文，國立台北科技大學電機工程系，2007。

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