錯相式DE類諧振轉換器之研製

Design and Implementation of Interleaved Class DE Resonant Converters

邱煥智(Huan-Jr Chiou)

指導教授 ： 吳黎明

健行科技大學/電資學院/電機工程所/碩士(2010年)

https://doi.org/10.6824/UCH.2010.00049

摘要

本論文主旨為設計並製作一「錯相式DE類型諧振轉換器」。DE類型諧振電路具有架構簡單、低電壓與電流應力、低成本等優點，當電路操作在電感性負載的條件下，開關元件具有零電壓導通特性，可降低切換損失，提升電路效率。為了降低輸出電壓、電流漣波，本文依諧振電流為弦波之特性，分別將兩組DE類型諧振電路以錯位方式連結，在相同的半橋驅動訊號控制下，產出兩組180°錯相之弦波電流，發揮相位相消效應，因此不需複雜的錯相開關電路。
本論文分別以類比及數位方法實現錯相式DE類型諧振轉換器之閉迴路控制。在類比部份，以意法半導體(ST)公司的L6599 IC為控制晶片，運用頻率調變方法，達到輸出穩壓之目的；數位部份則分別以微控制器PIC18F452及PIC24F16KA102為控制單元，除實現閉迴路控制外，並探討數位頻率解析度對輸出電壓的影響。
本論文經由理論分析、設計與模擬，實際製作兩組180W/19V/9.4A之錯相式DE類型諧振轉換器與一組90W/19V/4.7A DE類型諧振轉換器，除量測各種性能外並運用頻率響應分析儀進行閉迴路穩定度之量測。由實驗及測試結果，證明理論與實驗相當一致，功率開關在全負載範圍皆可零電壓導通，滿載效率可達88.7%以上，且整體閉迴路穩定性經由頻率響應分析儀之波德圖量測，均能達到系統之要求。

關鍵字

錯相式轉換器 ； DE類諧振轉換器 ； 零電壓切換 ； 微控制處理器

並列摘要

The objective of this thesis is to design and implement the interleaved Class DE resonant converters, which has the advantages of simple structure, low voltage and current stresses, and low component counts. Under the design of inductive load, the converter has the characteristics of zero voltage switching which reduces turn-on loss and results in high efficiency. Increase of power rating and reduction of ripple current are obtained by cross-interleaving two class DE resonant converters and phase cancellation effect. Hence simple driving circuit design can be resulted.
The output voltage regulation of the interleaved converter is realized by both analog and digital control methods. While the IC chip L6599 is used in the analog method, the microcontroller PIC18F452 and PIC24F16KA102 are utilized individually in the digital method. The impact of frequency resolution with respect to the accuracy of close loop control is investigated as well in the digital approach.
Apart from theoretical analysis, design and computer simulation, two prototype interleaved DE resonant converters with rated output 180W/19V/9.4A and one DE resonant converter with rated output 90W/19V/4.7A are designed and implemented, respectively. The performance of the prototype converters is measured and in good agreement with the simulation results. The interleaved converter efficiency at full load is 88.7%. Besides, the stability of the converters is confirmed by Bode plots which are obtained from using frequency response analyzer.

並列關鍵字

Interleaved ； Class DE resonant converter ； ZVS ； Microcontroller

參考文獻

參考文獻

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