Effect of Metamaterial Application on Coupling Coefficient of Wireless Power Transfer

• Main Author: Jeebklum P.
• Other Authors: Mahidol University
• Format: Conference or Workshop Item
• Published: 2023
• Subjects: Engineering
• Online Access: https://repository.li.mahidol.ac.th/handle/123456789/90291

An investigation on the effect of metamaterial applications on the coupling coefficient of wireless power transfer. The coupling coefficient is the magnetic compatibility of the coil pair that depends on the material of the core. The wireless power transfer has air as the core. The coupling coefficient of air cores can be as low that depending on the gap between the two coils. Thus, the coupling coefficient affects the efficiency of the wireless power transfer. The wireless power transfer was designed following the Society of Automotive Engineer standard (SAE). The gap between the transmitter and the receiver coil is 0.15 m. The coupling coefficients were simulated on ANSYS Maxwell 3D. The simulation was divided into 2 main cases that the wireless power transfer without metamaterial slab and the wireless power transfer with metamaterial slab. The wireless power transfer with metamaterial slab is simulated with 2 types that the edge metamaterial slab and the symmetrical metamaterial slab. The gap between the metamaterial slab and the transmitter coil is adjusted to 0.01–0.10 m. The result was found that in the case of the wireless power transfer without metamaterial slab, the coupling coefficient was 0.4056. The symmetrical metamaterial slab at a gap between the transmitter coil and the metamaterial slab of 0.01 m gives a maximum coupling coefficient of 0.4062. Therefore, the wireless power transfer with metamaterial slab gives a greater coupling coefficient than the wireless power transfer without metamaterial slab.