Article(id=1190413889415294980, tenantId=1146029695717560320, journalId=1190306094246359042, issueId=1190413885736894766, articleNumber=null, orderNo=null, doi=10.19595/j.cnki.1000-6753.tces.241178, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1720022400000, receivedDateStr=2024-07-04, revisedDate=1721836800000, revisedDateStr=2024-07-25, acceptedDate=null, acceptedDateStr=null, onlineDate=1761746388056, onlineDateStr=2025-10-29, pubDate=1750780800000, pubDateStr=2025-06-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1761746388056, onlineIssueDateStr=2025-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1761746388056, creator=13701087609, updateTime=1761746388056, updator=13701087609, issue=Issue{id=1190413885736894766, tenantId=1146029695717560320, journalId=1190306094246359042, year='2025', volume='40', issue='12', pageStart='3691', pageEnd='4016', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1761746387172, creator=13701087609, updateTime=1761785301742, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1190577105311253479, tenantId=1146029695717560320, journalId=1190306094246359042, issueId=1190413885736894766, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1190577105311253480, tenantId=1146029695717560320, journalId=1190306094246359042, issueId=1190413885736894766, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=3727, endPage=3741, ext={EN=ArticleExt(id=1190413890329653257, articleId=1190413889415294980, tenantId=1146029695717560320, journalId=1190306094246359042, language=EN, title=Measurement Method for Output Power of Transmitting Coil in Wireless Charging System Based on Multi Sensing Coil Collaboration, columnId=null, journalTitle=Transactions of China Electrotechnical Society, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Wireless charging technology is safer and more convenient than traditional wired charging, and has been widely used in the field of electric vehicles. However, wireless charging systems have the characteristic of separating the ground end and the vehicle end, and there are issues with the selection and measurement of power metering points. The mainstream approach is to set the measurement position of the wireless charging system on the transmitting coil. However, the current and voltage of the transmitting coil are relatively high, so that directly using sensors for measurement can lead to high sensor costs. To address the aforementioned issues, this paper proposed a non-contact measurement method for output power of transmitting coil of wireless charging systems using multi coil collaboration. This method did not require specialized high-power high-frequency current and voltage sensors, and adapted well to practical scenarios such as different power levels, horizontal and vertical ground displacement of cars, and shielding materials, and had high measurement accuracy.
The paper utilized the law of electromagnetic induction to measure the output power of transmitting coil by setting sensing coils. Firstly, it was inferred that there was a relationship between the output power of transmitting coil and the voltage product of the sensing coil. Secondly, the fitting coefficient was used to fit this relationship, and it was derived that when the positions of detection coils and transmission coil were fixed, the fitting coefficient did not shift with the receiving coil. After obtaining the fitting coefficient, only the terminal voltage of the sensing coil needed to be measured. Finally, by constructing the voltage matrix of sensing coils and the standard output power of transmitting coil matrix, the fitting coefficients were obtained, and a coupling matrix model was established between the voltage phasor of each sensing coil and the output power of transmitting coil considering horizontal offset, vertical offset, and power variation.
The experimental results show that under different power levels, the maximum measurement error of the proposed method is within 1.5% when the wireless charging system undergoes offset in both horizontal and vertical ground directions. Under the condition of 2 square sensing coils, the maximum error in power measurement was 47%. When the number of sensing coils increased to 6, the maximum error decreased to within 1.5%. This result indicates that as the number of sensing coils increases, the accuracy will further improve. Meanwhile, research has found that when the transmitting and receiving coil are square, using a square sensing coil results in more ideal accuracy. In addition, with the use of 6 detection coils, 3, 5, and 9 power sampling points were used within the measured power range. The maximum errors in power measurement were 7.8%, 3.6%, and 1.5%, respectively, indicating that the more sampling points are, the more accurate the model is. Finally, further exploration is conducted on the practical scenario of placing multiple sensing coils horizontally, which can avoid the problem of vertical stacking height affecting the short distance power measurement.
This method has been proven to be effective through simulation and experimental analysis. Through comparative analysis of the results, the following conclusions can be drawn: (1) The size and quantity of detection coils are key to ensuring the accuracy of the model. A sufficient number of sensing coils will bring higher model accuracy, but at the same time, it will also increase the number of samples in the model solving process. Therefore, in practice, a reasonable selection can be made based on the measured power error requirements. (2) For coupling devices where both the transmitting and receiving coils are square coils, the measurement accuracy using square sensing coils is more ideal compared to circular sensing coils. (3) A sufficient number of sampling points in model solving can also affect the accuracy of the entire system model. In practice, a reasonable selection can be made based on the measured power error requirements. (4) Horizontal placement of multiple sensing coils can achieve high-precision power measurement, just like vertical stacking. In practical scenarios, placing multiple sensing coils horizontally can avoid the problem of vertical stacking height affecting the short distance measurement of the transmitting and receiving coils.
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为了降低无线充电系统耦合线圈上高频高压直接测量的技术复杂度和经济成本,该文首先提出一种多感测线圈协同的无线充电系统发射线圈输出功率非接触测量方法。相比于传统的直接测量方式,该方法仅需若干组独立的感测线圈,无需专用的大功率高频电流、电压传感器,同时可以很好地适应于不同功率等级、汽车水平与垂直地面方向的位置偏移以及屏蔽材料等实际场景。该文首先利用电磁感应定律,通过在线圈表面设置多组感测线圈进行测量,建立了考虑水平、垂直偏移及功率变化的各感测线圈电压相量与发射线圈输出功率之间的耦合矩阵模型。然后给出了多感测线圈的参数设计依据,并进行了仿真与实验验证。接着探讨感测线圈的形状、数目与采样点数量对测量精度的影响。最后进一步探讨实际场景将多感测线圈水平放置,可以避免垂直叠放高度影响收发线圈短距离测量的问题。实验结果表明,在不同功率等级下,无线充电系统在水平与垂直地面方向同时发生偏移时,所提方法的最大计量误差在1.5%以内,具有较高的测量准确性和实用价值。
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王嘉琦 女,2000年生,硕士研究生,研究方向为电动汽车无线电能传输系统电能计量。E-mail: 2565490567@qq.com
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王嘉琦 女,2000年生,硕士研究生,研究方向为电动汽车无线电能传输系统电能计量。E-mail: 2565490567@qq.com
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55(5): 171-180., articleTitle=Research on double-sided LCC resonant topology and electromagnetic safety for wireless charging system of electric vehicles, refAbstract=null)], funds=[Fund(id=1190684174353842400, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, awardId=52277004, language=CN, fundingSource=江苏高校“青蓝工程”、国家自然科学基金(52277004), fundOrder=null, country=null), Fund(id=1190684174458700001, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, awardId=null, language=CN, fundingSource=江苏省智能电网技术与装备重点实验室课题资助项目, fundOrder=null, country=null)], companyList=[AuthorCompany(id=1190684161464746133, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, xref=null, ext=[AuthorCompanyExt(id=1190684161473134742, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, companyId=1190684161464746133, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=School of Electrical Engineering Southeast University Nanjing 210096 China), AuthorCompanyExt(id=1190684161481523351, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, companyId=1190684161464746133, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=东南大学电气工程学院 南京 210096)])], figs=[ArticleFig(id=1190684164824383658, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.1, caption=
Schematic diagram of WPT, figureFileSmall=eJDmNhYrD7z9QVZs0vuiFw==, figureFileBig=sgZhcaLmG8221nIw/HVciQ==, tableContent=null), ArticleFig(id=1190684164987961515, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图1, caption=
WPT系统示意图, figureFileSmall=eJDmNhYrD7z9QVZs0vuiFw==, figureFileBig=sgZhcaLmG8221nIw/HVciQ==, tableContent=null), ArticleFig(id=1190684165138956460, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.2, caption=
WPT system energy flow, figureFileSmall=OP8HYAw0WLNmXuvOe06GQw==, figureFileBig=f37iTCM3maU3RtaogPpacQ==, tableContent=null), ArticleFig(id=1190684165218648237, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图2, caption=
WPT系统能流, figureFileSmall=OP8HYAw0WLNmXuvOe06GQw==, figureFileBig=f37iTCM3maU3RtaogPpacQ==, tableContent=null), ArticleFig(id=1190684165331894446, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.3, caption=
Principle of transmission power on the transmitting coil, figureFileSmall=/nXriSnmjRMwa+HOxSrV8w==, figureFileBig=E8Cs6M0o+1xbVbXgZzgJlA==, tableContent=null), ArticleFig(id=1190684165474500783, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图3, caption=
发射线圈输出功率原理, figureFileSmall=/nXriSnmjRMwa+HOxSrV8w==, figureFileBig=E8Cs6M0o+1xbVbXgZzgJlA==, tableContent=null), ArticleFig(id=1190684165596135600, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.4, caption=
Principle of coupling of transmitting and receiving coils with multiple sensing coils, figureFileSmall=KQ7A/pcIw/epHOGQEJke0Q==, figureFileBig=SFMq69HoXxJRMt2qz7wvtA==, tableContent=null), ArticleFig(id=1190684165688410289, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图4, caption=
带多个感测线圈的收发线圈耦合原理, figureFileSmall=KQ7A/pcIw/epHOGQEJke0Q==, figureFileBig=SFMq69HoXxJRMt2qz7wvtA==, tableContent=null), ArticleFig(id=1190684165784879282, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.5, caption=
EV-WPT simulation model with sensing coils, figureFileSmall=xLawwjylmweoxdeLcyi12Q==, figureFileBig=++9ymNi6BWg9RM+ET/oxEA==, tableContent=null), ArticleFig(id=1190684165881348275, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图5, caption=
含感测线圈的EV-WPT仿真模型, figureFileSmall=xLawwjylmweoxdeLcyi12Q==, figureFileBig=++9ymNi6BWg9RM+ET/oxEA==, tableContent=null), ArticleFig(id=1190684165982011572, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.6, caption=
Fmn function between any two sensing coils, figureFileSmall=b8F67vNb8Fkk8j35oNPAFQ==, figureFileBig=dVuvX8dEjUQt5b04vTGI1g==, tableContent=null), ArticleFig(id=1190684166078480565, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图6, caption=
任意两感测线圈之间Fmn函数, figureFileSmall=b8F67vNb8Fkk8j35oNPAFQ==, figureFileBig=dVuvX8dEjUQt5b04vTGI1g==, tableContent=null), ArticleFig(id=1190684166288195766, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.7, caption=
Fitting error results of sensing coils with different shapes, figureFileSmall=ZWqkBfkB20ZkAlF6BtNvuA==, figureFileBig=JpPmD24oWaUDFpO8OhaC5A==, tableContent=null), ArticleFig(id=1190684166644711607, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图7, caption=
不同形状感测线圈的拟合误差结果, figureFileSmall=ZWqkBfkB20ZkAlF6BtNvuA==, figureFileBig=JpPmD24oWaUDFpO8OhaC5A==, tableContent=null), ArticleFig(id=1190684168137883832, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.8, caption=
Physical verification platform, figureFileSmall=X/mz0Gh37Eo7H3ylvSGdvg==, figureFileBig=JXO1magKpa1LYqQ+/R0oNQ==, tableContent=null), ArticleFig(id=1190684168389542073, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图8, caption=
实物验证平台, figureFileSmall=X/mz0Gh37Eo7H3ylvSGdvg==, figureFileBig=JXO1magKpa1LYqQ+/R0oNQ==, tableContent=null), ArticleFig(id=1190684168540537018, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.9, caption=
Principle of bilateral LCC wireless charging system, figureFileSmall=bQXIpUKeBW5fLAHUtTzNQQ==, figureFileBig=bpZYrOIavZyorB8NisLSiQ==, tableContent=null), ArticleFig(id=1190684168653783227, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图9, caption=
双边LCC无线充电系统原理, figureFileSmall=bQXIpUKeBW5fLAHUtTzNQQ==, figureFileBig=bpZYrOIavZyorB8NisLSiQ==, tableContent=null), ArticleFig(id=1190684168880275644, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.10, caption=
Offset direction and offset direction of each sensing coil, figureFileSmall=BxEKgs49C30EwgTbM2sToQ==, figureFileBig=LsmP8dKM0lk+1gYNBGI7ew==, tableContent=null), ArticleFig(id=1190684168993521853, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图10, caption=
各感测线圈位置分布及偏移方向, figureFileSmall=BxEKgs49C30EwgTbM2sToQ==, figureFileBig=LsmP8dKM0lk+1gYNBGI7ew==, tableContent=null), ArticleFig(id=1190684169136128190, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.11, caption=
λmn calculation flowchart, figureFileSmall=wneJo2tjACKcVkhq60CPvA==, figureFileBig=98xPWnA0XwMGLXcS8sflmw==, tableContent=null), ArticleFig(id=1190684169240985791, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图11, caption=
λmn计算流程, figureFileSmall=wneJo2tjACKcVkhq60CPvA==, figureFileBig=98xPWnA0XwMGLXcS8sflmw==, tableContent=null), ArticleFig(id=1190684169324871872, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.12, caption=
x=100 mm, z=40 mm, experimental waveforms diagram of six sensing coils, figureFileSmall=CUtZAQDCUvFrXWqHGjDZCg==, figureFileBig=g1sZnjMnI8YG+1WlLYlLDg==, tableContent=null), ArticleFig(id=1190684169433923777, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图12, caption=
x=100 mm,z=40 mm,6个感测线圈实验波形, figureFileSmall=CUtZAQDCUvFrXWqHGjDZCg==, figureFileBig=g1sZnjMnI8YG+1WlLYlLDg==, tableContent=null), ArticleFig(id=1190684169534587074, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.13, caption=
Measurement error when z-direction offset is -40 mm, figureFileSmall=jfqXEGa8f2LKVqFjNG/15Q==, figureFileBig=zOSpgPVN00wD9TZBZKMY+A==, tableContent=null), ArticleFig(id=1190684169685582019, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图13, caption=
z方向偏移-40 mm时测量误差, figureFileSmall=jfqXEGa8f2LKVqFjNG/15Q==, figureFileBig=zOSpgPVN00wD9TZBZKMY+A==, tableContent=null), ArticleFig(id=1190684169765273796, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.14, caption=
Measurement error when z-direction offset is 0 mm, figureFileSmall=VK11SXVbwlMYYehL23xe1A==, figureFileBig=0avPwjfTX1ozgsYLGCkDxg==, tableContent=null), ArticleFig(id=1190684169861742789, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图14, caption=
z方向偏移0 mm时测量误差, figureFileSmall=VK11SXVbwlMYYehL23xe1A==, figureFileBig=0avPwjfTX1ozgsYLGCkDxg==, tableContent=null), ArticleFig(id=1190684169945628870, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.15, caption=
Measurement error when z-direction offset is 40 mm, figureFileSmall=9yEb01ICImPecgnrJheWxQ==, figureFileBig=DZk9ybtyc42u4T0tJ1JoFA==, tableContent=null), ArticleFig(id=1190684170042097863, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图15, caption=
z方向偏移40 mm时测量误差, figureFileSmall=9yEb01ICImPecgnrJheWxQ==, figureFileBig=DZk9ybtyc42u4T0tJ1JoFA==, tableContent=null), ArticleFig(id=1190684170151149768, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.16, caption=
The influence of z-offset (six sensing coils) on power measurement error, figureFileSmall=vyK7I3WbHVYpn4rvjNCSrA==, figureFileBig=OKej6YafvNK7xhxJuUgaDw==, tableContent=null), ArticleFig(id=1190684170285367497, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图16, caption=
z偏移(6个感测线圈)对功率测量误差的影响, figureFileSmall=vyK7I3WbHVYpn4rvjNCSrA==, figureFileBig=OKej6YafvNK7xhxJuUgaDw==, tableContent=null), ArticleFig(id=1190684170503471306, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.17, caption=
The influence of different power sampling points on measurement error, figureFileSmall=CWFRfCWRxDnajVv3UzbiLg==, figureFileBig=UYK4XdQBNrT/hjZa9iCwRg==, tableContent=null), ArticleFig(id=1190684170675437771, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图17, caption=
不同功率采样点数对测量误差影响, figureFileSmall=CWFRfCWRxDnajVv3UzbiLg==, figureFileBig=UYK4XdQBNrT/hjZa9iCwRg==, tableContent=null), ArticleFig(id=1190684170822238412, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.18, caption=
EV-WPT simulation model with multiple sensing coils placed horizontally, figureFileSmall=NiTNRV0v3V4RqCcO4vuU/w==, figureFileBig=TIro/l+oah7kurLkhyvEkg==, tableContent=null), ArticleFig(id=1190684170927096013, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图18, caption=
多感测线圈水平放置的EV-WPT仿真模型, figureFileSmall=NiTNRV0v3V4RqCcO4vuU/w==, figureFileBig=TIro/l+oah7kurLkhyvEkg==, tableContent=null), ArticleFig(id=1190684171010982094, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Fig.19, caption=
Measurement error of multiple sensing coils vertical stracking and placed horizontally, figureFileSmall=5hdoC5BetFv78hyWj2NIog==, figureFileBig=b55xEJ5RYexi785ZGi+iJg==, tableContent=null), ArticleFig(id=1190684171120033999, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=图19, caption=
多感测线圈垂直叠放和水平放置测量误差, figureFileSmall=5hdoC5BetFv78hyWj2NIog==, figureFileBig=b55xEJ5RYexi785ZGi+iJg==, tableContent=null), ArticleFig(id=1190684171216502992, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Tab.1, caption=
Transceiver coil parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参 数 | 数 值 |
| 发射线圈外圈、内圈边长/mm | 500, 290 |
| 接收线圈外圈、内圈边长/mm | 400, 60 |
| 感测线圈边长/mm | 400 |
| 发射线圈、接收线圈高度/mm | 3, 3 |
| 感测线圈高度/mm | 1 |
| 收发线圈距离/mm | 200 |
| 发射线圈与第m个感测线圈距离/mm | 10m |
| 发射线圈、接收线圈匝数 | 9, 15 |
| 感测线圈匝数 | 1 |
), ArticleFig(id=1190684171317166289, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=表1, caption=
收发线圈仿真参数
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| 参 数 | 数 值 |
| 发射线圈外圈、内圈边长/mm | 500, 290 |
| 接收线圈外圈、内圈边长/mm | 400, 60 |
| 感测线圈边长/mm | 400 |
| 发射线圈、接收线圈高度/mm | 3, 3 |
| 感测线圈高度/mm | 1 |
| 收发线圈距离/mm | 200 |
| 发射线圈与第m个感测线圈距离/mm | 10m |
| 发射线圈、接收线圈匝数 | 9, 15 |
| 感测线圈匝数 | 1 |
), ArticleFig(id=1190684171468161234, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Tab.2, caption=
Corresponding coefficients of each expansion term of the Fmn function between any two sensing coils
, figureFileSmall=null, figureFileBig=null, tableContent=
| 系 数 | 数 值 |
| F13(0, 0) | 6.07×10-6 |
| ∂F13/∂x | 1.505×10-9 |
| ∂F13/∂z | 2.215×10-9 |
| ∂2F13/∂x2 | -2.079×10-11 |
| ∂2F13/∂x∂z | 5.746×10-12 |
| ∂2F13/∂z2 | 3.965×10-12 |
| F23(0, 0) | 1.331×10-5 |
| ∂F23/∂x | 5.588×10-10 |
| ∂F23/∂z | 5.993×10-9 |
| ∂2F23/∂x2 | 2.223×10-11 |
| ∂2F23/∂x∂z | -2.428×10-11 |
| ∂2F23/∂z2 | 6.33×10-13 |
| F45(0,0) | 1.411×10-5 |
| ∂F45/∂x | 7.748×10-10 |
| ∂F45/∂z | 1.072×10-8 |
| ∂2F45/∂x2 | 1.565×10-11 |
| ∂2F45/∂x∂z | 9.381×10-13 |
| ∂2F45/∂z2 | 3.416×10-12 |
| F46(0, 0) | 7.796×10-6 |
| ∂F46/∂x | 5.044×10-10 |
| ∂F46/∂z | 9.416×10-9 |
| ∂2F46/∂x2 | 1.109×10-11 |
| ∂2F46/∂x∂z | -1.034×10-11 |
| ∂2F46/∂z2 | 2.05×10-11 |
), ArticleFig(id=1190684172663537875, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=表2, caption=
任意两感测线圈之间Fmn函数各展开项对应系数
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| 系 数 | 数 值 |
| F13(0, 0) | 6.07×10-6 |
| ∂F13/∂x | 1.505×10-9 |
| ∂F13/∂z | 2.215×10-9 |
| ∂2F13/∂x2 | -2.079×10-11 |
| ∂2F13/∂x∂z | 5.746×10-12 |
| ∂2F13/∂z2 | 3.965×10-12 |
| F23(0, 0) | 1.331×10-5 |
| ∂F23/∂x | 5.588×10-10 |
| ∂F23/∂z | 5.993×10-9 |
| ∂2F23/∂x2 | 2.223×10-11 |
| ∂2F23/∂x∂z | -2.428×10-11 |
| ∂2F23/∂z2 | 6.33×10-13 |
| F45(0,0) | 1.411×10-5 |
| ∂F45/∂x | 7.748×10-10 |
| ∂F45/∂z | 1.072×10-8 |
| ∂2F45/∂x2 | 1.565×10-11 |
| ∂2F45/∂x∂z | 9.381×10-13 |
| ∂2F45/∂z2 | 3.416×10-12 |
| F46(0, 0) | 7.796×10-6 |
| ∂F46/∂x | 5.044×10-10 |
| ∂F46/∂z | 9.416×10-9 |
| ∂2F46/∂x2 | 1.109×10-11 |
| ∂2F46/∂x∂z | -1.034×10-11 |
| ∂2F46/∂z2 | 2.05×10-11 |
), ArticleFig(id=1190684172831310036, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Tab.3, caption=
System component parameters
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| 参 数 | 数 值 |
| 系统工作频率f/kHz | 86.1 |
| 发射线圈自感Lt/μH | 96.35 |
| 接收线圈自感Lr/μH | 90.6 |
| 发射线圈内阻Rt/Ω | 0.195 |
| 接收线圈内阻Rr/Ω | 0.203 |
| 发射端谐振电感Lf1/μH | 20 |
| 接收端谐振电感Lf2/μH | 21 |
| 发射端谐振电感内阻Rm/Ω | 0.048 |
| 接收端谐振电感内阻Rn/Ω | 0.034 |
| 发射端谐振电容Cf1/nF | 165.42 |
| 接收端谐振电容Cf2/nF | 157.54 |
| 发射端补偿电容C1 | 43.47 |
| 接收端补偿电容C2 | 41.99 |
| 等效负载RL/Ω | 12 |
| 互感Mtr/μH | 12.08 |
| 输入电压幅值/V | 180+2.5t (t=1, 2, 3,…, 8) |
), ArticleFig(id=1190684172923584725, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=表3, caption=
系统元件参数
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| 参 数 | 数 值 |
| 系统工作频率f/kHz | 86.1 |
| 发射线圈自感Lt/μH | 96.35 |
| 接收线圈自感Lr/μH | 90.6 |
| 发射线圈内阻Rt/Ω | 0.195 |
| 接收线圈内阻Rr/Ω | 0.203 |
| 发射端谐振电感Lf1/μH | 20 |
| 接收端谐振电感Lf2/μH | 21 |
| 发射端谐振电感内阻Rm/Ω | 0.048 |
| 接收端谐振电感内阻Rn/Ω | 0.034 |
| 发射端谐振电容Cf1/nF | 165.42 |
| 接收端谐振电容Cf2/nF | 157.54 |
| 发射端补偿电容C1 | 43.47 |
| 接收端补偿电容C2 | 41.99 |
| 等效负载RL/Ω | 12 |
| 互感Mtr/μH | 12.08 |
| 输入电压幅值/V | 180+2.5t (t=1, 2, 3,…, 8) |
), ArticleFig(id=1190684173045219542, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Tab.4, caption=
Simulation values of voltage amplitude and phase for six sensing coils
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| 电压 | 幅值/V | 相位差 | 平均数值/(°) |
| U1 | 107.92 | ∠U1-U2 | 0.657 |
| U2 | 95.29 | ∠U2-U3 | 0.761 |
| U3 | 84.71 | ∠U3-U4 | 0.879 |
| U4 | 75.80 | ∠U4-U5 | 1.004 |
| U5 | 68.34 | ∠U5-U6 | 1.141 |
| U6 | 62.11 | | |
), ArticleFig(id=1190684173166854359, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=表4, caption=
6个感测线圈电压幅值及相位差的仿真
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| 电压 | 幅值/V | 相位差 | 平均数值/(°) |
| U1 | 107.92 | ∠U1-U2 | 0.657 |
| U2 | 95.29 | ∠U2-U3 | 0.761 |
| U3 | 84.71 | ∠U3-U4 | 0.879 |
| U4 | 75.80 | ∠U4-U5 | 1.004 |
| U5 | 68.34 | ∠U5-U6 | 1.141 |
| U6 | 62.11 | | |
), ArticleFig(id=1190684173275906264, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Tab.5, caption=
Fitting coefficient table for six sensing coils
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| 系 数 | 数 值 |
| λ12 | -21.03 |
| λ13 | -19.15 |
| λ14 | 65.50 |
| λ15 | 37.50 |
| λ16 | -60.48 |
| λ23 | 85.51 |
| λ24 | -147.42 |
| λ25 | -117.21 |
| λ26 | 153.44 |
| λ34 | 92.39 |
| λ35 | 24.92 |
| λ36 | -42.97 |
| λ45 | 103.35 |
| λ46 | -93.55 |
| λ56 | 47.41 |
), ArticleFig(id=1190684173452067033, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=表5, caption=
6个感测线圈拟合系数
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| 系 数 | 数 值 |
| λ12 | -21.03 |
| λ13 | -19.15 |
| λ14 | 65.50 |
| λ15 | 37.50 |
| λ16 | -60.48 |
| λ23 | 85.51 |
| λ24 | -147.42 |
| λ25 | -117.21 |
| λ26 | 153.44 |
| λ34 | 92.39 |
| λ35 | 24.92 |
| λ36 | -42.97 |
| λ45 | 103.35 |
| λ46 | -93.55 |
| λ56 | 47.41 |
), ArticleFig(id=1190684173531758810, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Tab.6, caption=
Accurate error in power measurement at each sampling point
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| 偏移x/mm | 偏移z/mm | 误差e(%) |
| 0 | -40 | 1.44 |
| 0 | 0 | 1.01 |
| 0 | 40 | 1.4 |
| 20 | -40 | 0.78 |
| 20 | 0 | 1.48 |
| 20 | 40 | 1.46 |
| 40 | -40 | 1.1 |
| 40 | 0 | 1.49 |
| 40 | 40 | 0.59 |
| 60 | -40 | 1.49 |
| 60 | 0 | 1.34 |
| 60 | 40 | 1.16 |
| 80 | -40 | 1.38 |
| 80 | 0 | 1.41 |
| 80 | 40 | 1.36 |
| 100 | -40 | 1.42 |
| 100 | 0 | 1.2 |
| 100 | 40 | 1.24 |
), ArticleFig(id=1190684173619839195, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=表6, caption=
各采样点功率测量的精确误差
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| 偏移x/mm | 偏移z/mm | 误差e(%) |
| 0 | -40 | 1.44 |
| 0 | 0 | 1.01 |
| 0 | 40 | 1.4 |
| 20 | -40 | 0.78 |
| 20 | 0 | 1.48 |
| 20 | 40 | 1.46 |
| 40 | -40 | 1.1 |
| 40 | 0 | 1.49 |
| 40 | 40 | 0.59 |
| 60 | -40 | 1.49 |
| 60 | 0 | 1.34 |
| 60 | 40 | 1.16 |
| 80 | -40 | 1.38 |
| 80 | 0 | 1.41 |
| 80 | 40 | 1.36 |
| 100 | -40 | 1.42 |
| 100 | 0 | 1.2 |
| 100 | 40 | 1.24 |
), ArticleFig(id=1190684173699530972, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Tab.7, caption=
Multi sensing coil parameter
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| 参 数 | 数 值 |
| 第m个感测线圈边长/mm | 420~20m |
| 感测线圈高度/mm | 1 |
| 发射线圈与多个感测线圈距离/mm | 10 |
| 感测线圈匝数 | 1 |
| 感测线圈数量 | 6 |
), ArticleFig(id=1190684173850525917, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=表7, caption=
多感测线圈仿真参数
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| 参 数 | 数 值 |
| 第m个感测线圈边长/mm | 420~20m |
| 感测线圈高度/mm | 1 |
| 发射线圈与多个感测线圈距离/mm | 10 |
| 感测线圈匝数 | 1 |
| 感测线圈数量 | 6 |
), ArticleFig(id=1190684174014103774, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=EN, label=Tab.8, caption=
Comparison table with existing methods
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| 比较内容 | FC-TPM | 本文方法 |
| 接收线圈水平偏移范围/mm | 0~100 | 0~100 |
| 接收线圈垂直偏移范围/mm | 无 | -40~40 |
| 是否考虑磁心和屏蔽材料 | 否 | 是 |
| 收发线圈形状 | 圆形 | 方形 |
| 感测线圈形状 | 圆形 | 圆形、方形 |
| 功率等级范围/W | 60~1 000 | 400~2 500 |
| 精度(%) | 0.1 | 1.5 |
| 传输效率损耗(%) | ≈0 | ≤0.02 |
), ArticleFig(id=1190684174123155679, tenantId=1146029695717560320, journalId=1190306094246359042, articleId=1190413889415294980, language=CN, label=表8, caption=
与现有方法比较
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| 比较内容 | FC-TPM | 本文方法 |
| 接收线圈水平偏移范围/mm | 0~100 | 0~100 |
| 接收线圈垂直偏移范围/mm | 无 | -40~40 |
| 是否考虑磁心和屏蔽材料 | 否 | 是 |
| 收发线圈形状 | 圆形 | 方形 |
| 感测线圈形状 | 圆形 | 圆形、方形 |
| 功率等级范围/W | 60~1 000 | 400~2 500 |
| 精度(%) | 0.1 | 1.5 |
| 传输效率损耗(%) | ≈0 | ≤0.02 |
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