High-efficiency resonant coupled wireless power transfer via tunable impedance matching
| Autor: | Narendra Kumar, Tanbir Ibne Anowar, Surajit Das Barman, Ahmed Wasif Reza |
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| Rok vydání: | 2017 |
| Předmět: |
Coupling
Engineering Resonant inductive coupling Matching (statistics) business.industry 020208 electrical & electronic engineering Impedance matching 020206 networking & telecommunications 02 engineering and technology Electromagnetic coil 0202 electrical engineering electronic engineering information engineering Electronic engineering Maximum power transfer theorem Equivalent circuit Wireless power transfer Electrical and Electronic Engineering business |
| Zdroj: | International Journal of Electronics. 104:1607-1625 |
| ISSN: | 1362-3060 0020-7217 |
| DOI: | 10.1080/00207217.2017.1312711 |
| Popis: | For magnetic resonant coupled wireless power transfer (WPT), the axial movement of near-field coupled coils adversely degrades the power transfer efficiency (PTE) of the system and often creates sub-resonance. This paper presents a tunable impedance matching technique based on optimum coupling tuning to enhance the efficiency of resonant coupled WPT system. The optimum power transfer model is analysed from equivalent circuit model via reflected load principle, and the adequate matching are achieved through the optimum tuning of coupling coefficients at both the transmitting and receiving end of the system. Both simulations and experiments are performed to evaluate the theoretical model of the proposed matching technique, and results in a PTE over 80% at close coil proximity without shifting the original resonant frequency. Compared to the fixed coupled WPT, the extracted efficiency shows 15.1% and 19.9% improvements at the centre-to-centre misalignment of 10 and 70 cm, respectively. Applying this ... |
| Databáze: | OpenAIRE |
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