Optimized NFC Circuit and Coil Design for Wireless Power Transfer with 2D Free-Positioning and Low Load Sensibility †
Abstract
:1. Introduction
2. The WPT System Overview
3. Coil Design and Optimization of Its Dimensions
3.1. Coil Design
3.1.1. Coil Inductance
3.1.2. AC Resistance
3.1.3. Parasitic Capacitance
3.1.4. RL Equivalent Circuit
3.2. Optimization of Coil Dimensions by Maximizing the Efficiency
3.2.1. Circuit Analysis
3.2.2. Optimization Procedure
4. System Optimization Proposition
4.1. Optimization of Dimensions through Figure of Merit Maximization
4.2. Receiver’s Circuit Design and Optimization
4.3. Transmitter’s Circuit Design and Optimization
5. Experimental Results
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Conflicts of Interest
References
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Tx | 3 | 11.27 | 7.65 | 0.3 | 0.9 |
Rx | 4 | 4 | 4 | 0.4 | 1 |
Theory | 82.2% | 87.2% | 2.93 Ω | 2.83 µH | 1.17 Ω | 1.24 µH |
Simulation | 83.3% | 87.3% | 2.78 Ω | 2.88 µH | 1.07 Ω | 1.27 µH |
Measurements | 81.7% | 87.0% | 2.88 Ω | 2.99 µH | 1.23 Ω | 1.30 µH |
Tx | 3 | 11.4 | 7 | 1.2 | 0.9 |
Rx | 5 | 4 | 4 | 1.2 | 0.4 |
Theory | 846 mΩ | 2.08 µH | 210 | 527 mΩ | 1.36 µH | 220 |
Simulations | 836 mΩ | 2.17 µH | 221 | 628 mΩ | 1.40 µH | 190 |
Measurements | 978 mΩ | 2.33 µH | 202 | 663 mΩ | 1.41 µH | 181 |
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Buchmeier, G.G.; Takacs, A.; Dragomirescu, D.; Alarcon Ramos, J.; Fortes Montilla, A. Optimized NFC Circuit and Coil Design for Wireless Power Transfer with 2D Free-Positioning and Low Load Sensibility. Sensors 2021, 21, 8074. https://doi.org/10.3390/s21238074
Buchmeier GG, Takacs A, Dragomirescu D, Alarcon Ramos J, Fortes Montilla A. Optimized NFC Circuit and Coil Design for Wireless Power Transfer with 2D Free-Positioning and Low Load Sensibility. Sensors. 2021; 21(23):8074. https://doi.org/10.3390/s21238074
Chicago/Turabian StyleBuchmeier, Guilherme Germano, Alexandru Takacs, Daniela Dragomirescu, Juvenal Alarcon Ramos, and Amaia Fortes Montilla. 2021. "Optimized NFC Circuit and Coil Design for Wireless Power Transfer with 2D Free-Positioning and Low Load Sensibility" Sensors 21, no. 23: 8074. https://doi.org/10.3390/s21238074
APA StyleBuchmeier, G. G., Takacs, A., Dragomirescu, D., Alarcon Ramos, J., & Fortes Montilla, A. (2021). Optimized NFC Circuit and Coil Design for Wireless Power Transfer with 2D Free-Positioning and Low Load Sensibility. Sensors, 21(23), 8074. https://doi.org/10.3390/s21238074