Wireless Power Transfer: Types of Reflected Impedances and Maximum Power Transfer Theorem
| Autor: | Gianluca Lazzi, Manjunath Machnoor |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
020206 networking & telecommunications 02 engineering and technology Power factor Radius AC power Topology Power (physics) 0202 electrical engineering electronic engineering information engineering Maximum power transfer theorem Wireless power transfer Electrical and Electronic Engineering Maxima Electrical impedance |
| Zdroj: | IEEE Antennas and Wireless Propagation Letters. 19:1709-1713 |
| ISSN: | 1548-5757 1536-1225 |
| DOI: | 10.1109/lawp.2020.3014357 |
| Popis: | In this letter, different types of resonant reflected impedances (real, imaginary, and negative) and conditions for their existence are introduced using power flow paths. The condition necessary to achieve maxima of power delivery at a high (>0.5) system efficiency is derived while maintaining a power factor of 0.85 or above. A 4-coil wireless power transfer system operating at 4.7 MHz is implemented, to demonstrate that by controlling the different types of reflected impedances it is possible to overcome MPT induced constraints. The implemented example utilizes four nonoverlapping coils of 35 mm radius; a maxima in power delivery is experimentally obtained while maintaining the efficiency and power factor above 0.5 and 0.85, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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