Field equivalent modeling analysis of wireless charging system with metal foreign objects
In the wireless charging system, the power transmission follows the magnetic coupling relationship between the transmitting coil and receiving coil. When there are metal foreign objects between the transmitting coil and receiving coil, the eddy current effect or magnetic focusing effect of the forei...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Power Engineering Technology
2023-05-01
|
| Series: | 电力工程技术 |
| Subjects: | |
| Online Access: | https://www.epet-info.com/dlgcjsen/article/abstract/220516696 |
| _version_ | 1797820052664221696 |
|---|---|
| author | SU Wenbo WANG Wei LYU Xiaofei DOU Zhenlan WANG Jiemin |
| author_facet | SU Wenbo WANG Wei LYU Xiaofei DOU Zhenlan WANG Jiemin |
| author_sort | SU Wenbo |
| collection | DOAJ |
| description | In the wireless charging system, the power transmission follows the magnetic coupling relationship between the transmitting coil and receiving coil. When there are metal foreign objects between the transmitting coil and receiving coil, the eddy current effect or magnetic focusing effect of the foreign objects will affect the transmission performance and operational stability of the wireless charging system, and in severe cases, it can also endanger charging safety. In order to clarify the influence mechanism of metal foreign objects with different materials on the performance of wireless charging system and effectively analyze the influence law of foreign objects, an accurate modeling method of metal foreignobjects is urgently needed to improve the detection accuracy of metal foreign objects. Therefore, an equivalent modeling method of metal foreign objects field is proposed, taking into account the key factors of metal material, location, equivalent area and so on. By constructing the coupling equation of wireless charging system under the influence of metal foreign objects, the expression of phase difference between the transmitting coil current and receiving coil current before and after the introduction of foreign objects is obtained. On this basis, the equivalent coil model of ferromagnetic metal and non-ferromagnetic metal and its parameter configuration method are further proposed, which can accurately obtain the current phase difference under the condition of metal foreign objects intervention. Finally, the accuracy and effectiveness of the modeling method are verified by simulation and experiment. This method provides a new idea for the characteristic analysis and online detection of metal foreign objects introduced in wireless charging system. |
| first_indexed | 2024-03-13T09:31:45Z |
| format | Article |
| id | doaj.art-c37f1af5ac0f41588284bee7d127f693 |
| institution | Directory Open Access Journal |
| issn | 2096-3203 |
| language | zho |
| last_indexed | 2024-03-13T09:31:45Z |
| publishDate | 2023-05-01 |
| publisher | Editorial Department of Electric Power Engineering Technology |
| record_format | Article |
| series | 电力工程技术 |
| spelling | doaj.art-c37f1af5ac0f41588284bee7d127f6932023-05-26T00:26:41ZzhoEditorial Department of Electric Power Engineering Technology电力工程技术2096-32032023-05-0142322623210.12158/j.2096-3203.2023.03.025220516696Field equivalent modeling analysis of wireless charging system with metal foreign objectsSU Wenbo0WANG Wei1LYU Xiaofei2DOU Zhenlan3WANG Jiemin4School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, ChinaSchool of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, ChinaNARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211106, ChinaState Grid Shanghai Electric Power Company, Shanghai 200122, ChinaNARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 211106, ChinaIn the wireless charging system, the power transmission follows the magnetic coupling relationship between the transmitting coil and receiving coil. When there are metal foreign objects between the transmitting coil and receiving coil, the eddy current effect or magnetic focusing effect of the foreign objects will affect the transmission performance and operational stability of the wireless charging system, and in severe cases, it can also endanger charging safety. In order to clarify the influence mechanism of metal foreign objects with different materials on the performance of wireless charging system and effectively analyze the influence law of foreign objects, an accurate modeling method of metal foreignobjects is urgently needed to improve the detection accuracy of metal foreign objects. Therefore, an equivalent modeling method of metal foreign objects field is proposed, taking into account the key factors of metal material, location, equivalent area and so on. By constructing the coupling equation of wireless charging system under the influence of metal foreign objects, the expression of phase difference between the transmitting coil current and receiving coil current before and after the introduction of foreign objects is obtained. On this basis, the equivalent coil model of ferromagnetic metal and non-ferromagnetic metal and its parameter configuration method are further proposed, which can accurately obtain the current phase difference under the condition of metal foreign objects intervention. Finally, the accuracy and effectiveness of the modeling method are verified by simulation and experiment. This method provides a new idea for the characteristic analysis and online detection of metal foreign objects introduced in wireless charging system.https://www.epet-info.com/dlgcjsen/article/abstract/220516696wireless chargingforeign objects detectionmetal foreign objectsnumerical calculationfield modelingphase analysis |
| spellingShingle | SU Wenbo WANG Wei LYU Xiaofei DOU Zhenlan WANG Jiemin Field equivalent modeling analysis of wireless charging system with metal foreign objects 电力工程技术 wireless charging foreign objects detection metal foreign objects numerical calculation field modeling phase analysis |
| title | Field equivalent modeling analysis of wireless charging system with metal foreign objects |
| title_full | Field equivalent modeling analysis of wireless charging system with metal foreign objects |
| title_fullStr | Field equivalent modeling analysis of wireless charging system with metal foreign objects |
| title_full_unstemmed | Field equivalent modeling analysis of wireless charging system with metal foreign objects |
| title_short | Field equivalent modeling analysis of wireless charging system with metal foreign objects |
| title_sort | field equivalent modeling analysis of wireless charging system with metal foreign objects |
| topic | wireless charging foreign objects detection metal foreign objects numerical calculation field modeling phase analysis |
| url | https://www.epet-info.com/dlgcjsen/article/abstract/220516696 |
| work_keys_str_mv | AT suwenbo fieldequivalentmodelinganalysisofwirelesschargingsystemwithmetalforeignobjects AT wangwei fieldequivalentmodelinganalysisofwirelesschargingsystemwithmetalforeignobjects AT lyuxiaofei fieldequivalentmodelinganalysisofwirelesschargingsystemwithmetalforeignobjects AT douzhenlan fieldequivalentmodelinganalysisofwirelesschargingsystemwithmetalforeignobjects AT wangjiemin fieldequivalentmodelinganalysisofwirelesschargingsystemwithmetalforeignobjects |