Wireless Power Transfer Coil Configuration

This configuration involves two outer coils and one middle coil.

Wireless power transfer coil configuration. Of ee and cse university of washington seattle wa 98195 usa 2dept. Bhw2114 uw edu abstract optimization of coil sizes for wireless power transfer. Mahoney gunbok lee2 and joshua r. The two coil transmitter is introduced as an extension to the converge area.

Other new additions include a high power coil we wpcc 760308101311 with 400 w output and a flat version two coils whose respective heights of 2 8 mm and 3 1 mm are only half as high as those of wireless power transfer coils combine charging function and nfc. Waters 1 brody j. This paper presents a complete analytical model of a resonant wireless power transfer link where the efficiency is remarkably increased with the improved power transmission coil configuration. Positioning the receiver coil over the transmitter coil causes magnetic coupling when the transmitter coil is driven.

For many near field wireless power systems such as the one specified by the wpc the behavior of the magnetic power transfer can be modeled by a simple transformer. Optimal coil size ratios for wireless power transfer applications benjamin h. Since the power is transferred from the external coil to the implant coil only when the secondary battery needs charging the external coil connected with the base station is put on the skin or clothes only under charging. In contrast magnetic resonance based wireless power transfer transmits power as the system inserts a capacitor in power transmission and receiving sides to form lc resonance circuits and tunes both sides to resonate at the same resonance frequency.

Therefore the maximum distance between two coils is about 20 mm. In near field or non radiative techniques power is transferred over short distances by magnetic fields using inductive coupling between coils of wire or by electric fields using capacitive coupling between metal electrodes. A novel system with a two coil transmitter connected to a single power source is proposed here in a triplet configuration with a single receiving coil. A traditional transformer usually has a single physical struc ture with two windings around a core material that is highly permeable compared to air figure 1.

Research into bidirectional wireless power transfer from grid to. Flux couples into the secondary coil which induces a voltage and current flows. Create new designs for the coils that generate the magnetic field that wirelessly transfers power. Of ee pohang university of science and technology pohang gyungbuk 790 784 korea email.