Design of High-Efficiency Matching Networks for Capacitive Wireless Power Transfer Systems
| Autor: | Khurram K. Afridi, Brandon Regensburger, Sreyam Sinha, Ashish Kumar |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
010302 applied physics
Matching (statistics) Computer science Capacitive sensing 020208 electrical & electronic engineering Energy Engineering and Power Technology 02 engineering and technology 01 natural sciences Compensation (engineering) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electronic engineering Range (statistics) Maximum power transfer theorem Wireless power transfer Electrical and Electronic Engineering Voltage |
| Zdroj: | IEEE Journal of Emerging and Selected Topics in Power Electronics. 10:104-127 |
| ISSN: | 2168-6785 2168-6777 |
| Popis: | Matching networks are an efficient means of providing large voltage or current gain and reactive compensation in high-frequency wireless power transfer (WPT) systems. This paper introduces an analytical optimization approach for the design of L-section matching networks in capacitive WPT systems, which maximizes the network efficiency while achieving the required overall gain and compensation. The proposed approach identifies the optimal number of matching network stages, and the optimal distribution of gains and compensations among these stages. Compared to the conventional approach to designing matching networks for capacitive WPT systems, the proposed approach results in a higher and flatter efficiency for a wide range of air-gap voltages. The proposed approach also offers a better trade-off between efficiency and power transfer density, while meeting electric field safety requirements. The efficiency predictions of the proposed design approach are experimentally validated using three 6.78-MHz 100-W prototype capacitive WPT systems, one with single-stage matching networks, one with two-stage matching networks, and another with three-stage matching networks. The measured matching network efficiencies of the prototype systems are in close agreement with the theoretical predictions. The prototype system with two-stage matching networks is also compared with a prototype system designed using the conventional approach, and is shown to achieve significantly higher efficiency. |
| Databáze: | OpenAIRE |
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