A Low Frequency Wireless Power Transfer Using Parallel Resonance under Impedance Matching

Abstract:

Nowadays, there are more studies about the wireless power transfer (WPT) for mobile charging, electrical vehicles, implantable biomedical devices, and other applications. They (series resonance) commonly operate at high the self-resonant frequency (f₀, several hundred kHz - several MHz ranges) based on magnetic coupling under impedance matching (IM). Operating at high f₀ to increase the transfer distance, but high f₀ (several MHz ranges) causes other parasitic losses of devices and the effectiveness to humans. In this paper, we propose a new method to design WPT using the parallel resonance under IM at low f₀. The two coils are 10-turns with the radius of 6.2 cm. The efficiency (35.77 %) of the system under IM is achieved at the transfer distance of 10 cm and f₀=20.388 kHz (low frequency), and the transfer distance can be increased by reducing f₀.

• Periodical: Applied Mechanics and Materials (Volume 781)
• Pages: 410-413
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.781.410
• Online since: August 2015
• Authors: Artit Rittiplang*, Wanchai Pijitrojana
• Keywords: Decreasing Frequency, Impedance Matching, Low Frequency Wireless Power Transfer, Low Resonant Frequency, Parallel Resonance, Wireless Power Transfer

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