新型E類共振式轉換器蓄電池充電器

A Novel Class-E Resonant Converter for Battery Chargers

李育瑞(Yu-Ruei Li)

指導教授 ： 王永山

崑山科技大學/工程學院/電機工程研究所/碩士(2010年)

摘要

為實現高效率的共振式充電器，本文運用E類共振式換流器作為主架構，於輸出端結合橋式整流電路使E類換流器成為嶄新的DC/DC轉換器。與傳統需使用兩個主動開關的D類共振式換流器相比較之下，本論文所提出之嶄新DC/DC轉換器具有電路元件精簡且效率更高，在設計適當的共振電路參數之下，不但可使電路操作於零電壓(ZVS)切換的特性，更有效地大幅降低切換損失。將此嶄新的DC/DC轉換器應用於蓄電池充電器，不僅可讓鉛酸蓄電池於充電時能有效地消除充電電流漣波，更可延長蓄電池的使用壽命。因此，本文所提出之嶄新的DC/DC轉換器電路不但具有創新性，電路本身更具有體積小、重量輕、低成本及高充電效率等優點。
本文中將詳細探討嶄新E類共振式轉換器充電器之工作原理、模式分析、E類換流器數學模式推導與理論探討，並實際設計出適合蓄電池的充電器。最後，本文將利用6V-10Ah的鉛酸蓄電池作充電測試，由實驗結果證實，本文所提出嶄新E類共振式轉換器充電器理論之正確性，且電路確實可應用於蓄電池充電器之可行性。由充電特性曲線圖結果顯示其充電電流平穩與充電速率佳的優點，充電器的充電平均效率達到86.63%，且最高充電效率更可高達89.3%，實驗結果令人十分滿意。

關鍵字

充電器 ； 共振式轉換器 ； E類換流器 ； 零電壓切換

並列摘要

In order to realize a highly-efficient resonant charger, this study utilizes a Class-E resonant inverter as a central framework, connecting a bridge rectifier circuit at the output terminal in order to turn the inverter into a new kind of DC-to-DC converter. Compared with traditional Class-D resonant inverters, which require two active switches, this new kind of DC-to-DC converter has simplified circuit components and higher efficiency. Within the parameters of designing an appropriate resonant circuit, not only can it operate with zero-voltage switching, it can also greatly reduce switching loss. Using this all-new DC-to-DC converter in battery chargers extends the life of rechargeable batteries in addition to effectively reducing current ripple when charging lead-acid batteries. Therefore, this novel DC-to-DC converter has the advantages of being smaller, lighter, cheaper to produce, and able to charge more efficiently compared to other converters.
This article will discuss in detail the principles of operating a Class-E resonant-switch converter, model analysis, mathematical derivation and theoretical discussion of Class-E inverters, and practical designs for chargers suitable for use with rechargeable batteries. Finally, this study utilized a 6V-10Ah lead-acid battery to test the charger. The experimental results prove the validity of the theory of the proposed Class-E resonant-switch converter battery charger in this article, and prove the feasibility of using this circuit in a battery charger. The graphs provided show the excellent current stability and charging rate of the device. The charger achieved an average of 86.63% efficiency, reaching a peak efficiency of 89.3%. The results of the experiment were quite satisfactory.

並列關鍵字

battery charger ； resonant converter ； Class-E inverter ； ZVS

參考文獻

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