Magnetic Levitation Wireless Charging Platform with Adjustable Magnetic Levitation Height and Resonant Frequency for a Better Charging Efficiency

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Abstract
This paper mainly focuses on the combination of magnetic levitation height adjustment and wireless charging. The magnetic levitation height adjustment is provided by adding both an electromagnetic levitation coil and a ready-made magnetic levitation platform. This design changes the magnetic field strength of the electromagnetic levitation coil with a Pulse-Width-Modulation (PWM) signal in order to adjust the magnetic levitation height. The wireless charging uses a wireless charging coil with an adjustable resonant frequency and coordinates with the height of the magnetic levitation to find a better wireless charging efficiency.