An Improved Cross-Connection Abatement Algorithm with RSSI Using In-Band Magnetic Field Control in Densely Located LC Wireless Charger Environments

Abstract

In densely located loosely coupled wireless charger environments, cross-connection errors can occur when wireless chargers operate at the same time within the same wireless communication range. In this work, an effective algorithm is proposed to prevent cross-connection error. The algorithm based on the cross-connection abatement technique with the received signal strength indicator of out-band BLE communication has improved using an in-band magnetic field signal controlled by a pulse-width-modulation-like waveform. The experimental results obtained from a proper test set in a RF shield room verify that the wireless charging system using the proposed algorithm provides wireless charging services without cross-connection errors.

A wireless power transfer system based on impedance matching network

“…Among various WPT technologies, magnetic resonance coupling is a promising candidate for the power transfer over near-to mid-range distances with high efficiency because of the emitting and receiving coils operating in a same resonant frequency. [1][2][3][4][5][6][7] Generally, a WPT system consists of several modules, for instance power source, coupling module, rectifierfilter circuit, DC/DC converter, and load. At the first step of the WPT system design, each module is separately designed to achieve the optimal performance.…”

“…Wireless power transfer (WPT) pioneered by Tesla a century ago has been rapidly developed in extensive potential areas including biomedical implants, mobile charging pad platforms, electric vehicle recharging, and so forth. Among various WPT technologies, magnetic resonance coupling is a promising candidate for the power transfer over near‐ to mid‐range distances with high efficiency because of the emitting and receiving coils operating in a same resonant frequency 1‐7 …”