Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-26T05:01:15.326Z Has data issue: false hasContentIssue false
  • English
  • Français

A 3D wireless charging cube with externally enhanced magnetic field for extended range of wireless power transfer

Published online by Cambridge University Press:  03 April 2019

Qi Zhu Open the ORCID record for Qi Zhu [Opens in a new window] ,
Hua Han ,
Mei Su  and
Aiguo Patrick Hu
Qi Zhu*
Affiliation:
School of Automation, Central South University, Changsha, China Hunan Provincial Key Laboratory of Power Electronics Equipment and Grid, Changsha, China
Hua Han
Affiliation:
School of Automation, Central South University, Changsha, China Hunan Provincial Key Laboratory of Power Electronics Equipment and Grid, Changsha, China
Mei Su
Affiliation:
School of Automation, Central South University, Changsha, China Hunan Provincial Key Laboratory of Power Electronics Equipment and Grid, Changsha, China
Aiguo Patrick Hu
Affiliation:
Department of Electrical and Computer Engineering, the University of Auckland, Auckland, New Zealand
*
Corresponding author: Qi Zhu Email: [email protected]
Get access

Abstract

More mobile devices such as mobile phones and robots are wirelessly charged for convenience, simplicity, and safety, and it would be desirable to achieve three-dimensional (3D) wireless charging with high spatial freedom and long range. This paper proposes a 3D wireless charging cube with three orthogonal coils and supporting magnetic cores to enhance the magnetic flux outside the cube. The proposed system is simulated by Ansoft Maxwell and implemented by a downsized prototype. Both simulation and experimental results show that the magnetic cores can strengthen the magnitude of B-field outside the cube. The final prototype demonstrates that the power transfer distance outside the cube for getting the same induced electromotive force in the receiver coil is extended approximately by 50 mm using magnetic cores with a permeability of 2800. It is found that the magnitude of B-field outside the cube can be increased by increasing the width and the permeability of the magnetic cores. The measured results show that when the permeability of the magnetic cores is fixed, the induced electromotive force in the receiver coil at a point 300 mm away from the center of the cube is increased by about 2V when the width of the magnetic cores is increased from 50 to 100 mm. The increase in the induced electromotive force at an extended point implies a greater potential of wireless power transfer capability to the power pickup.

Keywords

3D wireless charging cubeInductive power transferSupporting magnetic coresThree orthogonal coils
Type
Research Article
Information
Wireless Power Transfer , Volume 6 , Issue 1 , March 2019 , pp. 67 - 76
Copyright
Copyright © Cambridge University Press 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]Lee, E.S.; Choi, B.H.; Sohn, Y.H.; Lim, G.C.; Rim, C.T.: Multiple dipole receiving coils for 2-D omnidirectional wireless mobile charging under wireless power zone, in Energy Conversion Congress and Exposition (ECCE), 2015 IEEE, September 2015, 3209–3214.Google Scholar
[2]Choi, B.H.; Lee, E.S.; Sohn, Y.H.; Kim, J.H.; Rim, C.T.: Crossed dipole coils for an omnidirectional wireless power zone with DQ rotating magnetic field, in Energy Conversion Congress and Exposition (ECCE), 2015 IEEE, September 2015, 2261–2268.Google Scholar
[3]Lee, E.S.; Choi, J.S.; Son, H.S.; Han, S.H.; Rim, C.T.: Six degrees of freedom wide-range ubiquitous IPT for IoT by DQ magnetic field. IEEE Trans. Power Electron., 32 (11) (2017), 8258–8276.Google Scholar
[4]Lee, E.S.; Sohn, Y.-H.; Choi, B.G.; Han, S.H.; Rim, C.T.: A modularized IPT with magnetic shielding for a wide-range ubiquitous Wi-power zone. IEEE Trans. Power Electron., 99 (2018), 1–1.Google Scholar
[5]Raval, P.; Kacprzak, D.; Hu, A.P.: 3D inductive power transfer power system. Wireless Power Transf., 1 (2014), 51–64.Google Scholar
[6]Raval, P.; Kacprzak, D.; Hu, A.P.: Multiphase inductive power transfer Box based on a rotating magnetic field. IEEE Trans. Ind. Electron., 62 (2) (2015), 795–802.Google Scholar
[7]Raval, P.; Kacprzak, D.; Hu, A.P.: Analysis of flux leakage of a 3-D inductive power transfer system. IEEE J. Emerging Sel. Topics Power Electron., 3 (1) (2015), 205–214.Google Scholar
[8]Ng, W.M.; Zhang, C.; Lin, D.; Ron Hui, S.Y.: Two- and three-dimensional omnidirectional wireless power transfer. IEEE Trans. Power Electron., 29 (9) (2014), 4470–4474.Google Scholar
[9]Lin, D.; Zhang, C.; Ron Hui, S.Y.: Mathematical analysis of omnidirectional wireless power transfer—part-I: two-dimensional systems. IEEE Trans. Power Electron., 32 (1) (2017), 625–633.Google Scholar
[10]Lin, D.; Zhang, C.; Ron Hui, S.Y.: Mathematic analysis of omnidirectional wireless power transfer—part-II three-dimensional systems. IEEE Trans. Power Electron., 32 (1) (2017), 613–624.Google Scholar
[11]Zhang, C.; Lin, D.; Ron Hui, S.Y.: Basic control principles of omnidirectional wireless power transfer. IEEE Trans. Power Electron., 31 (7) (2016), 5215–5227.Google Scholar
[12]Lim, Y.; Ahn, H.-S.; Park, J.: Analysis of antenna structure for energy beamforming in wireless power transfer. IEEE Trans. Antennas Propag., 65 (11) (2017), 6085–6094.Google Scholar
[13]Lim, Y.; Park, J.: A novel phase-control-based energy beamforming techniques in nonradiative wireless power transfer. IEEE Trans. Power Electron., 30 (11) (2015), 6274–6287.Google Scholar
[14]Zhu, Q.; Su, M.; Sun, Y.; Tang, W.; Hu, A.P.: Field orientation based on current amplitude and phase angle control for wireless power transfer. IEEE Trans. Ind. Electron., 65 (6) (2018), 4758–4770.Google Scholar
[15]Nguyen, D.T.; Lee, E.S.; Choi, B.G.; Rim, C.T.: Optimal shaped dipole-coil design and experimental verification of inductive power transfer system for home applications, in Proc. IEEE Appl. Power Electron. Conf. Expo., March 2016, 1773–1779.Google Scholar