應用於非接觸型充電器的LLC半橋轉換器之研製

Design and Implementation of LLC-type Half-Bridge Converter for Contactless Battery Charger

楊大為(Da-Wei Yang)

指導教授 ： 何金滿

中原大學/工學院/電機工程研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000341

摘要

傳統充電器多採傳導型接觸充電法，亦即以金屬接點連接方式對電子產品充電，但其充電連接器金屬接點之接觸與外露易受環境因素而生銹腐蝕。在某些特殊環境下，使用傳導型接觸充電法會變得相當危險，因此有非接觸感應充電技術的提出，本篇論文將對非接觸式充電技術進行探討。本文採用半橋式反流器，並利用變壓器之激磁電感與漏感進行諧振，功率開關具備零電壓切換之性能，以達到降低功率開關之切換應力、切換損失及改善電磁干擾現象，搭配諧振電路使得變壓器匝比減少，進而提高整體效率，並在不同氣隙及負載的情況下對其性能進行探討。本文所研製90W非接觸式充電器，為直流270V、輸出為12V，重載情況下，氣隙為0.15mm時系統效率為75.42%，在氣隙設定最大0.75mm時，系統效率為60.17%。

關鍵字

非接觸式充電 ； LLC諧振 ； 半橋式反流器

並列摘要

To charge electronic products, a conduct-type charging by means of metal contact connections is mostly adopted in traditional chargers. However, both the contact points and the exposure of the charger connector cause the vulnerability as well as the corrosion of metal. In certain environments, the use of conduct-type charging has become pretty dangerous. In regard to safety concerns, the non-contact inductive charging technology has therefore arisen. To keep pace with the cutting-edge technology, this thesis will probe into the application of the non-contact inductive power charging technology. In this thesis, a half-bridge inverter is employed. The transformer magnetizing inductance as well as the leakage inductance is used to carry out resonance. The switch with zero voltage switching (ZVS) achieves the goals of reducing the stresses of components, the losses in switching , and the electromagnetic interference. Furthermore, the use of resonant circuit enhance the overall efficiency. A 90W non-contact charger with DC 270V input and 12V output voltage, is implemented in this thesis. In a full loaded condition, while an air gap is 0.15mm, the system efficiency is 75.42%. The system efficiency is 60.17% at the maximum air gap of 0.75mm.

並列關鍵字

Half bridge inverter ； Non-contact charger ； LLC-type resonant

參考文獻

【17】 趙恆生，感應充電器耦合電路設計研究。中原大學碩士論文，民國九十年。

【18】 葉作勉，相移式零電壓切換感應充電器耦合電路設計與研製。中原大學碩士論文，民國九十三年。

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【1】 Y. Jang, and M. M. Jovanovic, Industrial Electronics, “A contactless electrical energy transmission system for portable telephone battery chargers,” IEEE Transactions on Industrial Electronics Vol. 50, no. 3 pp. 520 – 527, 2003.