4.7 Article

An Unconventional Measurement Technique to Estimate Power Transfer Efficiency in Series-Series Resonant WPT System Using S-Parameters

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2022.3181291

关键词

Mutual coupling; network analyzer; power transfer efficiency; S-parameters; wireless power transfer (WPT)

资金

  1. Science and Engineering Research Board (SERB), Department of Science and Technology, Government of India [ECR/2018/000343]

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Power transfer efficiency is a critical performance parameter in wireless power transfer system design. This article proposes a novel S-parameter efficiency measurement technique that accurately assesses the system's high-frequency performance using user-calibrated source and load factors.
Power transfer efficiency is a critical performance parameter for the coil design of a wireless power transfer (WPT) system. An accurate and simplistic measurement technique of power transfer efficiency will ensure the system less susceptible to the external environment with high reliability. Broadly, S-parameter-based efficiency is considered a precise measurement technique attained by the network analyzer. However, it lacks consistency in the practical scenario, the input-output ports being calibrated at 50 Omega. Accordingly, most of the power dissipates in the instrument's internal resistance. Therefore, this article proposes a novel S-parameter efficiency measurement technique aided by user-calibrated source and load factors. This technique's output ensures the WPT system's performance assessment even at high frequencies by S-parameters at all conditions. Besides, the proposed technique is experimentally verified and compared with various conventional techniques employed in several literary works.

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