A Novel Class-E Resonant Converter for Battery Chargers
| Autor: | Yu-Ruei Li, 李育瑞 |
|---|---|
| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 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. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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