Work

Enhanced Wireless Power Transmission Using Strong Paramagnetic Response

Year: 2013

Type: article

Abstract: A method of quasi-static magnetic resonant coupling has been presented for improving the power transmission efficiency (PTE) in near-field wireless power transmission, which improves upon the state of the art. The traditional source resonator on the transmitter side is equipped with an additional resonator with a resonance frequency that is tuned substantially higher than the magnetic field excitation frequency. This additional resonator enhances the magnetic dipole moment and the effective permeability of the power transmitter, owing to a phenomenon known as the strong paramagnetic response. Both theoretical calculations and experimental results show increased PTE due to amplification of the effective permeability. In measurements, the PTE was improved from 57.8% to 64.2% at the nominal distance of 15 cm when the effective permeability was 2.6. The power delivered to load was also improved significantly, with the same 10 V excitation voltage, from 0.38 to 5.26 W.

Source: IEEE Transactions on Magnetics

DOI: 10.1109/tmag.2013.2284752

Authors: Dukju Ahn, Mehdi Kiani, Maysam Ghovanloo

Institution: Georgia Institute of Technology

Language: English

Topic: Wireless Power Transfer Systems

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: National Institute of Biomedical Imaging and Bioengineering

Awards: EnerCage: A Scalable Array of Intelligent Wireless Sensor Modules to Energize and, A Smart Wireless Homecage for High Throughput Longitudinal Animal Studies