Next Article in Journal
The Economic Viability of Renewable Portfolio Standard Support for Offshore Wind Farm Projects in Korea
Next Article in Special Issue
Inductive-Based Wireless Power Recharging System for an Innovative Endoscopic Capsule
Previous Article in Journal
Investigation of Electromagnetic, Thermal and Mechanical Characteristics of a Five-Phase Dual-Rotor Permanent-Magnet Synchronous Motor
Previous Article in Special Issue
A Uniform Voltage Gain Control for Alignment Robustness in Wireless EV Charging
Article Menu

Export Article

Open AccessArticle
Energies 2015, 8(9), 9719-9730; doi:10.3390/en8099719

Determining the Frequency for Load-Independent Output Current in Three-Coil Wireless Power Transfer System

Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
Author to whom correspondence should be addressed.
Academic Editor: K. T. Chau
Received: 29 July 2015 / Revised: 25 August 2015 / Accepted: 31 August 2015 / Published: 9 September 2015
(This article belongs to the Special Issue Wireless Power Transfer)
View Full-Text   |   Download PDF [1184 KB, uploaded 9 September 2015]   |  

Abstract

Conditions for load-independent output voltage or current in two-coil wireless power transfer (WPT) systems have been studied. However, analysis of load-independent output current in three-coil WPT system is still lacking in previous studies. This paper investigates the output current characteristics of a three-coil WPT system against load variations, and determines the operating frequency to achieve a constant output current. First, a three-coil WPT system is modeled by circuit theory, and the analytical expression of the root-mean-square of the output current is derived. By substituting the coupling coefficients, the quality factor, and the resonant frequency of each coil, we propose a method of calculating the frequency for load-independent output current in a three-coil WPT system, which indicates that there are two frequencies that can achieve load-independent output current. Experiments are conducted to validate these analytical results. View Full-Text
Keywords: three-coil; wireless power transfer (WPT); frequency; load-independent output current three-coil; wireless power transfer (WPT); frequency; load-independent output current
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Sun, L.; Tang, H.; Zhang, Y. Determining the Frequency for Load-Independent Output Current in Three-Coil Wireless Power Transfer System. Energies 2015, 8, 9719-9730.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top