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Title: The magnetic coupled wireless power transfer driver based on adjustable gain constant-current compensation network
Other Title: 基于可調增益恒流源補償網絡的磁場耦合無線電能傳輸LED驅動電路
Authors: Jing, Y
Qu, X
Han, H
Wong, S 
Tse, C 
Issue Date: 2016
Source: 電工技術學報 (Transactions of China Electrotechnical Society), 2016, v. 31, no. S1, p. 1-8
Abstract: 對于磁場耦合無線電能傳輸(WPT)系統, 由于松耦合變壓器漏感較大, 補償技術是實現其能量高效傳輸的關鍵。在半導體(LED)照明應用中, WPT LED驅動電路應直接輸出LED所需的驅動電流, 還應避免無功功率環流, 減小器件應力, 實現功率器件軟開關。 針對現有補償網絡的輸出電流增益依賴變壓器參數, 而松耦合變壓器存在設計受限的缺點, 本文采用二端口網絡理論, 提出一族恒流源補償網絡, 通過調節補償參數靈活調節輸出電流增益, 增加變壓器設計自由度。 最后采用同一電路結構和變壓器, 分別實現了0.5A、 1A 和 1.5A 輸出的 WPT LED 驅動電路, 實驗結果驗證了理論分析的正確性。 此外, 還對所提出的可調增益補償網絡的特性進行了詳細分析。
Due to the large leakage inductance of the loosely coupled transformer, compensation technology is crucial to improve the transfer efficiency in the magnetic coupled wireless power transfer (WPT) system. In the light-emitting diode (LED) lighting application, the WPT LED driver should provide not only the required LED current directly, but also zero reactive power, low device stress and soft switching. Compared with the conventional compensation network whose output current gain relies on the transformer parameters significantly, as well as the loosely coupled transformer with the constrained design,a family of novel constant-current compensation network using two-port network theory was proposed in this paper, where high freedom of current gain and transformer design were achieved by adjusting the compensation parameters. The prototypes with the same circuit topology and transformer were built to realize the output current of 0.5A, 1A, 1.5A, respectively, which agreed well with the theoretical analysis. Characteristics of these compensation networks were also analyzed in detail.
Keywords: Adjustable current gain
Light-emitting diode driver circuit
Loosely coupled transformer
Wireless power transfer compensation network
Publisher: 中國學術期刊(光盤版)電子雜誌社
Journal: 電工技術學報 (Transactions of China Electrotechnical Society) 
ISSN: 1000-6753
Rights: © 2016 中国学术期刊电子杂志出版社。本内容的使用仅限于教育、科研之目的。
© 2016 China Academic Journal Electronic Publishing House. It is to be used strictly for educational and research purposes.
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