CN112803605B - 一种三发射线圈阵列的无线电能传输方法 - Google Patents

一种三发射线圈阵列的无线电能传输方法 Download PDF

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CN112803605B
CN112803605B CN202110008018.6A CN202110008018A CN112803605B CN 112803605 B CN112803605 B CN 112803605B CN 202110008018 A CN202110008018 A CN 202110008018A CN 112803605 B CN112803605 B CN 112803605B
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羊箭锋
贺提超
周怡
严荣慧
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Suzhou Xinghang Comprehensive Survey Technology Co ltd
Suzhou University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

本发明公开了一种三发射线圈阵列的无线电能传输方法为：在发射线圈的发射端和接收端两侧放置铁氧体，使得三发射线圈的磁感线尽可能的汇聚在接收线圈区域；对接收线圈附近区域形成的磁场进行均匀采样，获取采样点的磁场强度值B；每个采样点由于空间位置的不同，建立权重分布公式，通过公式BZ＝∑B·P计算均匀采样点的磁感应强度值权重累加和，通过对比磁感应强度累加和BZ的大小，逐步调整发射线圈的分布位置，当BZ取值最大的时候，既线圈阵列排列方式最优。该三发射线圈阵列解决了单发射线圈由于器件限制导致功率无法提高的问题，三发射线圈的充电稳定性更好。

Description

一种三发射线圈阵列的无线电能传输方法
技术领域
本发明涉及线圈检测技术领域，具体为一种三发射线圈阵列的无线电能传输方法。
背景技术
目前的无线电能传输系统多为单发射线圈单接收线圈系统，该技术基于法拉第电磁感应定律，即对发射线圈施加一个高频交流电，交变电流会引起磁场的变化，而磁场的变化会在接收线圈内产生感应电流，从而将能量从发射端传输到接收端，便实现了无电气线路连接的能量传输。还有一些无线电能传输的产品发射线圈为多线圈，但工作时仅有一个工作，本质上和单发射线圈单接收线圈无线电能传输系统没有区别，仅仅是优化发射线圈与接收线圈的距离，并未提升发射功率。
发明内容
本发明的目的在于提供一种三发射线圈阵列的无线电能传输方法，以克服现有无线充电技术中单发射线圈系统传输功率低的缺陷。
为实现上述目的，本发明提供如下技术方案：一种三发射线圈阵列的无线电能传输方法具体方法为：步骤一、在发射线圈的发射端和接收端两侧放置铁氧体，使得三发射线圈的磁感线尽可能的汇聚在接收线圈区域；
步骤二、对接收线圈附近区域形成的磁场进行均匀采样，获取采样点的磁场强度值B；
步骤三、每个采样点由于空间位置的不同，对无线供能的贡献权重不同，处于接收线圈内部的无线供能强度高，线圈外围的无线供能强度低，根据是采样点的空间相对分布关系，设置每个采样点的重要性权重，其权重系数近似正态分布，权重分布公式如下，
Figure BDA0002883836690000021
其中d为采样点距充电线圈离中心位置，r为充电线圈的半径；
步骤四、通过公式BZ＝∑B*P计算均匀采样点的磁感应强度值权重累加和，通过对比磁感应强度累加和BZ的大小，逐步调整发射线圈的分布位置，当BZ取值最大的时候，即 线圈阵列排列方式最优。
与现有技术相比，本发明的有益效果是：
1、该三发射线圈阵列解决了单发射线圈由于器件限制导致功率无法提高 的问题。
2、较双发射线圈、四发射线圈阵列等，三线圈阵列具有对充电线圈的空间摆放位置容忍度更高的优点，即当充电线圈偏离发射线圈中心位置时，传输效率下降较二、四阵列更慢，三发射线圈的充电稳定性更好。
附图说明
图1为本发明三发射线圈阵列最终效果图；
图2为本实施例中不同线圈阵列随距离变化的传输效率图；
图3为本实施例中不同线圈阵列随偏移变化的传输效率图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本具体实施方式一种三发射线圈阵列的无线电能传输方法具体方法为：步骤一、参照图1所示，在发射线圈的发射端和接收端两侧放置铁氧体，使得三发射线圈的磁感线尽可能的汇聚在接收线圈区域；
步骤二、对接收线圈附近区域形成的磁场进行均匀采样，获取采样点的磁场强度值B；
步骤三、每个采样点由于空间位置的不同，对无线供能的贡献权重不同，处于接收线圈内部的无线供能强度高，线圈外围的无线供能强度低，根据是采样点的空间相对分布关系，设置每个采样点的重要性权重，其权重系数近似正态分布，权重分布公式如下，
Figure BDA0002883836690000031
其中d为采样点距充电线圈离中心位置， r为充电线圈的半径；
步骤四、通过公式BZ＝∑B*P计算均匀采样点的磁感应强度值权重累加和，通过对比磁感应强度累加和BZ的大小，逐步调整发射线圈的分布位置，当BZ取值最大的时候，即 线圈阵列排列方式最优。
实施例：对比不同组合发射线圈阵列的无线电能传输系统，如图2，3所示，收发距离逐渐增大，单线圈到三线圈勉强保持传输效率的增幅不变，而四线圈的下降幅度特别大，在收发距离为2cm时，四线圈的传输效率接近三线圈的传输效率；偏移距离大于1cm后四线圈的传输效率急剧下降，大于2cm 时三线圈阵列的传输效率下降速度也逐渐增大，由图2和图3论证三发射线圈阵列无线电能传输系统在传输距离、偏移距离改变的情况下，传输效率高、衰减幅度小、系统稳定性更强。
尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (1)

1.一种三发射线圈阵列的无线电能传输方法，其特征在于：具体方法为：
步骤一、在发射线圈的发射端和接收端两侧放置铁氧体，使得三发射线圈的磁感线尽可能的汇聚在接收线圈区域；
步骤二、对接收线圈附近区域形成的磁场进行均匀采样，获取采样点的磁场强度值B；
步骤三、每个采样点由于空间位置的不同，对无线供能的贡献权重不同，处于接收线圈内部的无线供能强度高，线圈外围的无线供能强度低，根据是采样点的空间相对分布关系，设置每个采样点的重要性权重，其权重系数近似正态分布，权重分布公式如下，
Figure FDA0002883836680000011
其中d为采样点距充电线圈离中心位置，r为充电线圈的半径；
步骤四、通过公式Bz＝∑B·P计算均匀采样点的磁感应强度值权重累加和，通过对比磁感应强度累加和Bz的大小，逐步调整发射线圈的分布位置，当Bz取值最大的时候，即 线圈阵列排列方式最优。
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