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

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. Broadl...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2022, Vol.71, p.1-9
Main Authors: Bharadwaj, Ananth, Sharma, Ashwani, Reddy, Chakradhar C.
Format: Article
Language:English
Subjects:
Biomedical measurement
Design parameters
Electrical resistance measurement
Measurement techniques
Mutual coupling
Network analysers
network analyzer
Performance assessment
Power measurement
power transfer efficiency
Resistance
S-parameters
Scattering parameters
Topology
wireless power transfer (WPT)
Wireless power transmission
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Description
Summary: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.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2022.3181291