Journal of Terahertz Science and Electronic Information Technology , Volume. 19, Issue 2, 286(2021)
Efficiency improvement of magnetic resonant wireless power transmission system based on frequency tuning
Theoretically, the magnetic coupling resonance wireless power transmission system can be designed to achieve high efficiency within the critical coupling zone. However, the system efficiency will decrease sharply when the distance is in the weak coupling zone and the resonance frequency will split when the distance is in the strong coupling zone. Therefore, a planar spiral coupling coil with ferrite core is designed and fabricated. Then the frequency tuning system is designed to keep the high transmission efficiency even when the transmission distance changes in the strong coupling zone. Measurement results demonstrate, when the transmission distance changes between 5-20 cm, the designed wireless power transmission system can guarantee an efficiency above 80%.
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WANG Zhiyuan, HU Taiping, YANG Yang. Efficiency improvement of magnetic resonant wireless power transmission system based on frequency tuning[J]. Journal of Terahertz Science and Electronic Information Technology , 2021, 19(2): 286
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Received: Nov. 7, 2020
Accepted: --
Published Online: Jul. 16, 2021
The Author Email: Zhiyuan WANG (zhiyuan6455@163.com)