期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 35, 期 10, 页码 11064-11081出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2020.2977849
关键词
Dynamic efficiency optimization; joint control with variable ZVS angles (JC-VZA); wireless power transfer system (WPTS); zero voltage switching (ZVS)
资金
- Fundamental Research Funds for the Central Universities [xjj2018186]
- Science & Technology Plan of Guangdong Province, China [2017B010112002]
- Shaanxi Key Research & Development Plan [2018GY-043]
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University
Tight voltage regulation and high efficiency are fundamental objectives of wireless power transfer systems (WPTSs) as power supplies. Although the well-established impedance matching control attempts to achieve high efficiency, the associated extra dc-dc converters or hard switching of converters in WPTSs reduce the overall system efficiency, particularly for high-power applications. In this article, under zero voltage switching (ZVS) conditions, the minimum power lass point is derived and proved in detail with different ZVS angles. Moreover, a joint control with variable ZVS angles (JC-VZA) is proposed to ensure ZVS of all switches and achieve the required output, simultaneously. This control scheme is implemented by use of controllers in both sides of WPTSs, which adjust their respective ZVS angles for dynamic efficiency optimization. Under ZVS conditions, the proposed JC-VZA features an optimal amount of reactive power that achieves the minimum total power loss by significantly reducing the switching loss. As a result, the experimental results obtained from our WPTS prototype verify its superiority. With a coupling coefficient k of 0.2 or 0.15, the maximum efficiency reaches 96.8% or 95.0% under the power rating of 288 W (rated load) as well as 92.4% or 88.7% in the case of light load (9% of 288 W).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据