Design of a Cylindrical Winding Structure for Wireless Power Transfer Used in Rotatory Applications
A cylindrical joint structure for wireless power transfer (WPT) systems is proposed. The transmitter (Tx) and receiver (Rx) coils were wound on hemicylindrical and cylindrical structures, respectively. The Rx coil rotates freely around the axial direction of the Tx coil. Different methods of winding...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2020-03-01
|
Series: | Electronics |
Subjects: | |
Online Access: | https://www.mdpi.com/2079-9292/9/3/526 |
id |
doaj-edac39d26c20452daed34d45240ccdaf |
---|---|
record_format |
Article |
spelling |
doaj-edac39d26c20452daed34d45240ccdaf2020-11-25T03:50:59ZengMDPI AGElectronics2079-92922020-03-019352610.3390/electronics9030526electronics9030526Design of a Cylindrical Winding Structure for Wireless Power Transfer Used in Rotatory ApplicationsMohamad Abou Houran0Xu Yang1Wenjie Chen2School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaSchool of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaSchool of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaA cylindrical joint structure for wireless power transfer (WPT) systems is proposed. The transmitter (Tx) and receiver (Rx) coils were wound on hemicylindrical and cylindrical structures, respectively. The Rx coil rotates freely around the axial direction of the Tx coil. Different methods of winding the Tx and Rx coils are given and discussed. Electromagnetic fields (EMFs) around the WPT windings should be lower than the limits set by WPT standards. Therefore, the WPT windings were designed to reduce EMF level and maintain constant power-transfer efficiency (PTE). The design procedures of the windings are discussed in detail. EMF analysis was done under different rotation angles (α). The selected design reduced the variation of the mutual inductance (<i>M</i>). As a result, it maintained a constant PTE while rotating the Rx coil between 0° and 85°. Moreover, leakage magnetic fields (LMFs) near the WPT coils of the chosen design were reduced by 63.6% compared with other winding methods that have the same efficiency. Finally, a prototype was built to validate the proposed idea. Experiment results were in good agreement with the simulation results. The WPT system maintained constant efficiency in spite of the rotation of Rx coil, where efficiency dropped by only 2.15% when the Rx coil rotated between 0° and 85°.https://www.mdpi.com/2079-9292/9/3/526cylindrical jointelectromagnetic fieldsrotation-free structurewireless power transfer |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mohamad Abou Houran Xu Yang Wenjie Chen |
spellingShingle |
Mohamad Abou Houran Xu Yang Wenjie Chen Design of a Cylindrical Winding Structure for Wireless Power Transfer Used in Rotatory Applications Electronics cylindrical joint electromagnetic fields rotation-free structure wireless power transfer |
author_facet |
Mohamad Abou Houran Xu Yang Wenjie Chen |
author_sort |
Mohamad Abou Houran |
title |
Design of a Cylindrical Winding Structure for Wireless Power Transfer Used in Rotatory Applications |
title_short |
Design of a Cylindrical Winding Structure for Wireless Power Transfer Used in Rotatory Applications |
title_full |
Design of a Cylindrical Winding Structure for Wireless Power Transfer Used in Rotatory Applications |
title_fullStr |
Design of a Cylindrical Winding Structure for Wireless Power Transfer Used in Rotatory Applications |
title_full_unstemmed |
Design of a Cylindrical Winding Structure for Wireless Power Transfer Used in Rotatory Applications |
title_sort |
design of a cylindrical winding structure for wireless power transfer used in rotatory applications |
publisher |
MDPI AG |
series |
Electronics |
issn |
2079-9292 |
publishDate |
2020-03-01 |
description |
A cylindrical joint structure for wireless power transfer (WPT) systems is proposed. The transmitter (Tx) and receiver (Rx) coils were wound on hemicylindrical and cylindrical structures, respectively. The Rx coil rotates freely around the axial direction of the Tx coil. Different methods of winding the Tx and Rx coils are given and discussed. Electromagnetic fields (EMFs) around the WPT windings should be lower than the limits set by WPT standards. Therefore, the WPT windings were designed to reduce EMF level and maintain constant power-transfer efficiency (PTE). The design procedures of the windings are discussed in detail. EMF analysis was done under different rotation angles (α). The selected design reduced the variation of the mutual inductance (<i>M</i>). As a result, it maintained a constant PTE while rotating the Rx coil between 0° and 85°. Moreover, leakage magnetic fields (LMFs) near the WPT coils of the chosen design were reduced by 63.6% compared with other winding methods that have the same efficiency. Finally, a prototype was built to validate the proposed idea. Experiment results were in good agreement with the simulation results. The WPT system maintained constant efficiency in spite of the rotation of Rx coil, where efficiency dropped by only 2.15% when the Rx coil rotated between 0° and 85°. |
topic |
cylindrical joint electromagnetic fields rotation-free structure wireless power transfer |
url |
https://www.mdpi.com/2079-9292/9/3/526 |
work_keys_str_mv |
AT mohamadabouhouran designofacylindricalwindingstructureforwirelesspowertransferusedinrotatoryapplications AT xuyang designofacylindricalwindingstructureforwirelesspowertransferusedinrotatoryapplications AT wenjiechen designofacylindricalwindingstructureforwirelesspowertransferusedinrotatoryapplications |
_version_ |
1724489336888492032 |