CN101803110A - 使来自无线功率磁谐振器的功率产量最大化 - Google Patents
使来自无线功率磁谐振器的功率产量最大化 Download PDFInfo
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
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- H—ELECTRICITY
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- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
Abstract
本发明揭示基于来自多个不同机构的限制的无线功率转移。
Description
本申请案主张2007年9月19日申请的第60/973,711号临时申请案的优先权,所述临时申请案的整个揭示内容以引用的方式并入本文中。
背景技术
在不使用电线来引导电磁场的情况下需要从源向目的地转移电能。先前尝试的困难已导致低效率以及所递送功率的量不适当。
我们的先前申请案和临时申请案描述了无线功率转移,所述申请案包含(但不限于)2008年1月22日申请的题目为“无线设备和方法(Wireless Apparatus and Methods)”的第12/018,069号美国专利申请案,所述美国专利申请案的整个揭示内容以引用的方式并入本文中。
所述系统可使用优选为谐振天线的发射天线和接收天线,所述天线大体上例如在5%-10%谐振、15%谐振或20%谐振内谐振。天线优选具有小尺寸以允许其配合到其中用于天线的可用空间可能有限的移动手持式装置中。可通过在发射天线的近场中存储能量而不是将能量以行进电磁波的形式发送到自由空间中来在两个天线之间实行有效的功率转移。可使用具有高质量因数的天线。放置两个高Q天线以使得其类似于松散耦合变压器而起作用,其中一个天线将功率感应到另一天线中。所述天线优选具有大于1000的Q。
发明内容
本申请案描述经由电磁场耦合从功率源到功率目的地的能量转移。
实施例描述形成将输出和功率转移维持在政府机构允许的电平处的系统和天线。
附图说明
现在将参看附图详细描述这些和其它方面,在附图中:
图1展示基于磁波的无线功率发射系统的框图。
具体实施方式
图1中展示基本实施例。功率发射器组合件100从源(例如,AC插头102)接收功率。频率产生器104用以将能量耦合到天线110(此处为谐振天线)。天线110包含电感性回路111,其以电感性方式耦合到高Q谐振天线部分112。谐振天线包含N数目个线圈回路113,每一回路具有半径RA。电容器114(此处展示为可变电容器)与线圈113串联,从而形成谐振回路。在所述实施例中,电容器是与线圈完全分离的结构,但在某些实施例中,形成线圈的电线的自电容可形成电容114。
频率产生器104可优选经调谐到天线110,且还经选择以获得FCC顺应性。
此实施例使用多向天线。115展示在所有方向上输出的能量。在天线的大部分输出不是电磁辐射能量而是较为静止的磁场的意义上,天线100是非辐射性的。当然,来自天线的部分输出将实际上辐射。
另一实施例可使用辐射性天线。
接收器150包含与发射天线110相距距离D放置的接收天线155。接收天线类似地为具有线圈部分和电容器的高Q谐振线圈天线151,其耦合到电感性耦合回路152。耦合回路152的输出在整流器160中整流,且施加于负载。所述负载可为任何类型的负载,例如为例如灯泡等电阻性负载,或者例如电器、计算机、可再充电电池、音乐播放器或汽车等电子装置负载。
能量可通过电场耦合或磁场耦合而转移,但本文主要描述磁场耦合作为一实施例。
电场耦合提供电感性加载的电偶极,其为开路电容器或介电圆盘。外来物体可能对电场耦合提供相对强的影响。磁场耦合可为优选的,因为磁场中的外来物体具有与“空白”空间相同的磁性质。
所述实施例描述使用电容性加载的磁偶极的磁场耦合。此偶极由形成线圈的至少一个回路或匝的电线回路与将天线电加载到谐振状态中的电容器串联形成。
有两种不同种类的限制置于这种类型的发射上:基于生物学效应的限制,以及基于管理效应的限制。后种效应仅仅是用以避免干扰其它发射。
生物学限制是基于高于其可能发生不利健康影响的阈值。还添加了安全容限。管理效应是基于避免干扰其它设备以及干扰相邻频带来设定的。
所述限制通常是基于密度限制(例如,瓦/平方厘米)、磁场限制(例如,安/米)和电场限制(例如,伏/米)来设定的。所述限制是通过用于远场测量的自由空间的阻抗来叙述的。
FCC是USA的无线通信监管团体。适用的管理标准是FCC CFR标题47。FCC还在§15.209中指定用于电场的辐射发射限制。这些限制在表I中展示且等效H场限制在表2中展示。
**除了在段落(g)中提供外,来自根据此章节操作的有意辐射器的基本发射不应位于频带54-72MHz、76-88MHz、174-216MHz或470-806MHz内。然而,根据这部分的其它章节(例如,章节15.231和15.241)准许在这些频带内的操作。
表I
在13.56MHz ISM带处存在例外,其规定在13.553-13.567MHz之间,电场强度不应在30米处超过15,848微伏/米。
频率(MHz) | H场强度(μA/m) | 测量距离(m) |
0.009-0.490 | 6.366/f(kHz) | 300 |
0.490-1.705 | 63.66/f(kHz) | 30 |
1.705-30.0 | 0.0796 | 30 |
13.553-13.567 | 42.04 | 30 |
表错误!在文献中没有指定式样的文本。FFC标题47第15部分H场辐射发射限制
为了将EN 300330管理限制与FCC管理限制进行比较,可将FCC限制外推到在10m处所作的测量。FCC在§15.31中规定,对于低于30MHz的频率,应使用40dB/十的外推因数。表3展示针对两个所关注频率的外推值。这些电平可用于比较目的。
频率(MHz) | 在10m处的H场强度(dBμA/m) |
0.130 | 32.8 |
13.56 | 51.6 |
表3
针对EMF电平的欧洲标准由ETSI和CENELEC管理。
ETSI管理限制根据以下标准来公布:ETSI EN 300330-1VI.5.1(2006-4):电磁兼容性和无线电频谱问题(ERM);近程装置(SRD);频率范围9kHz到25MHz中的无线电设备以及频率范围9kHz到30MHz中的电感回路系统;第1部分:技术特性和测试方法。EN 300330指定必须在10m处测量的H场(辐射)限制。这些限制在表4中展示。
表4ETSI EN 300330:在10m处的H场限制
表5
CENELEC针对H场电平公布以下相关文献,然而这些电平是关于人类暴露(生物学)限制:
EN 50366:“家用和类似电气器具-电磁场-用于评估和测量的方法”(CLC TC 61,在与CLC TC 106X的联合群组中产生)
EN 50392:“用以证明电子与电气设备遵守与人类暴露到电磁场(0Hz-300GHz)有关的基本约束的一般标准”
这两个文献均使用ICNIRP所给出的限制。
国际非电离辐射委员会(INIRC)还设定了健康/生物学限制。
INIRC在1992年作为国际辐射保护协会(IRPA)/国际非电离辐射委员会(INIRC)的接任者而成立。其职能是研究与不同形式的NIR相关联的危险、对NIR暴露限制开发国际指导方针以及处理NIR保护的所有方面。ICNIRP是由14个成员的主委会、4个科学常务委员会和若干咨询专家组成的独立科学专家团体。其还紧密连同WHO一起工作以开发人类暴露限制。
其已产生了确立用于限制EMF暴露以便提供抵抗已知不利健康影响的保护的指导方针的文献。在此文献中,定义了两个不同类别的指导方针:
基本约束:“直接基于所确立的健康影响的对暴露于随时间变化的电场、磁场和电磁场的限制”用于以下测量的量:电流密度、特定能量吸收率和功率密度。
已确定了各种科学基准以用于基于已经执行的若干科学研究来提供基本约束。所述科学研究用以确定可能发生各种不利健康影响所在的阈值。接着根据这些阈值(包括变动的安全因数)确定基本约束。以下是对用于针对不同频率范围确定基本约束的科学基准的描述。
1Hz-10MHz:基于用以防止对神经系统功能的影响的电流密度的约束
100kHz-10MHz:基于用以防止整个身体热应力和过度局限性组织加热的SAR以及用以防止对神经系统功能的影响的电流密度的约束
10MHz-10GHz:仅基于用以防止整个身体热应力和过度局限性组织加热的SAR的约束
10GHz-300GHz:基于用以防止在身体表面处或附近的组织中发生过度加热的功率密度的约束
基本约束是基于中央神经系统中的急剧瞬间效应且因此所述约束适用于短期或长期暴露两者。
参考电平:“出于实际暴露评估目的而提供以确定是否有可能超过基本约束”用于以下测量的量:电场强度、磁场强度、磁通量密度、功率密度和流动穿过四肢的电流。
参考电平是通过数学建模和从特定频率处的实验室研究结果外推而从基本约束获得的。
磁场模型(用于确定参考电平)假定身体具有均匀且各向同性的导电性且应用简单的圆形导电回路模型以通过对从法拉第感应法则导出的频率f处的纯正弦场使用以下等式来估计不同器官和身体区中的感生电流:
J=πRfσB
B:磁通量密度
R:用于电流感应的回路的半径
对于高于10MHz的频率,使用计算和实验数据从整个身体SAR基本约束获得了导出的E和H场强度。SAR值可能对于近场是无效的。对于谨慎的近似,这些场暴露电平可用于近场,因为来自E或H场作用的能量的耦合无法超过SAR约束。对于较不谨慎的估计,应使用基本约束。
为了遵守基本约束,可分开地而非加性地考虑用于E和H场的参考电平。
这些约束描述三种不同耦合机制,随时间变化的场通过所述耦合机制与生物相互作用:
耦合到低频率电场:导致组织内所存在的电偶极重新定向
耦合到低频率磁场:导致感生电场和循环电流
从电磁场吸收能量:导致能量吸收和温度增加,其可划分为四个种类:
100Hz-20MHz:能量吸收在颈部和腿部中最显著
20MHz-300MHz:整个身体中的高吸收
300MHz-10GHz:显著的局部不均匀吸收
>10GHz:吸收主要发生在身体表面处。
INIRC已将其指导方针划分为两个不同频率范围,且下文展示针对每一频率范围的生物学效应的概述。
高达100kHz:
暴露于低频率场是与膜刺激和对中央神经系统的导致神经和肌肉刺激的相关影响相关联
实验室研究已展示当感生电流密度处于10mAm^-2或低于10mAm^-2时,不存在所确立的不利健康影响。
100kHz-300GHz:
在100kHz与10MHz之间,过渡区由于电磁能量吸收从膜效应转变到加热效应。
在高于10MHz时,加热效应是主要的。
温度升高多于1-2℃可能具有例如热衰竭和中暑等不利健康影响。
1℃体温增加可能是由大约30分钟暴露于产生4W/kg整个身体SAR的EMF引起的。
职业暴露约束为0.4W/kg(最大暴露限制4W/kg的10%)。
脉冲(调制)辐射与CW辐射相比往往会产生较高不利生物学响应。此实例是“微波听觉”现象,其中具有正常听觉的人可感知到频率在200MHz到6.5GHz之间的脉冲调制场。
已经针对两个不同类别的暴露提供了基本约束和参考电平:
一般公众暴露:针对年龄和健康状况可能不同于工作人员的年龄和健康状况的一般人群的暴露。而且,公众通常不知道其暴露于场且无法采取任何预防行动(较多限制性电平)。
职业暴露:暴露于已知场,其允许在需要时采取预防措施(较少限制性电平)。
表4:针对高达10GHz的频率的用于随时间变化的电场和磁场的基本约束a
a注解:
1.f为以赫兹为单位的频率。
2.由于身体的电不均匀性,应在垂直于电流方向的1cm2横截面上对电流密度求平均值。
4.对于高达100kHz的频率且对于脉冲磁场,与脉冲相关联的最大电流密度可依据磁通量密度的升高/降落时间和最大变化速率来计算。感生电流密度可接着与恰当的基本约束进行比较。
5.所有SAR值将在任何6分钟周期内求平均值。
6.局限性SAR平均质量为任何10g邻近组织。如此获得的最大SAR应为用于暴露估计的值。
7.对于具有持续时间tp的脉冲,待在基本约束中应用的等效频率应计算为另外,对于在频率范围0.3到10GHz中的脉冲式暴露且对于头部的局限性暴露,为了限制或避免由热弹性膨胀造成的听觉影响,推荐额外的基本约束。这是SA应当针对工作人员不超过10mJ kg-1且针对一般公众不超过2mJ kg-1(在10g组织上求平均值)。
表2-4ICNIRP基本约束(高达10GHz)
表5.针对介于10与300GHz之间的频率的用于功率密度的基本约束a
a注解:
2.在1cm2上求平均值所得的空间最大功率密度应当不超过以上值的20倍。
表2-5ICNIRP基本约束(10到300GHz)
表6.针对到随时间变化的电场和磁场的职业暴露的参考电平(无扰均方根值)a
a注解:
1.f如在频率范围列中指示。
2.只要满足基本约束且可排除不利的间接影响,就可超过场强度值。
3.对于介于100kHz与10GHz之间的频率,Seq、E2、H2和B2应在任何6分钟周期内求平均值。
4.对于在高达100kHz的频率处的峰值,见表4,注解3。
5.对于在超过100kHz的频率处的峰值,见图1和2。在100kHz与10MHz之间,场强度的峰值通过从100kHz处的1.5倍峰值到10MHz处的32倍峰值进行内插来获得。对于超过10MHz的频率,建议峰值等效平面波功率密度(在脉冲宽度上求平均值)不超过Seq约束的1,000倍或场强度不超过表中所给出的场强度暴露电平的32倍。
7.未针对<1Hz的频率提供E场值,所述频率实际上是静态电场。来自低阻抗源的电击由针对此类设备确立的电安全程序来防止。
表2-6ICNIRP参考电平-职业暴露
表7.针对到随时间变化的电场和磁场的一般公众暴露的参考电平(无扰均方根值)a
a注解:
1.f如在频率范围列中指示。
2.只要满足基本约束且可排除不利的间接影响,就可超过场强度值。
3.对于介于100kHz与10GHz之间的频率,Seq、E2、H2和B2应在任何6分钟周期内求平均值。
4.对于在高达10kHz的频率处的峰值,见表4,注解3。
5.对于在超过100kHz的频率处的峰值,见图1和2。在100kHz与10MHz之间,场强度的峰值通过从100kHz处的1.5倍峰值到10MHz处的32倍峰值进行内插来获得。对于超过100MHz的频率,建议峰值等效平面波功率密度(在脉冲宽度上求平均值)不超过Seq约束的1,000倍或场强度不超过表中所给出的场强度暴露电平的32倍。
6.对于超过10GHz的频率,Seq、E2、H2和B2应在任何分钟周期内求平均值(f以GHz为单位)。
7.未针对<1Hz的频率提供E场值,所述频率实际上是静态电场。在小于25kVm-1的场强度处将不会发生表面电荷的感知。应当避免造成应力或麻烦的火花放电。
表2-7ICNIRP参考电平-一般公众暴露
除了管理限制外,FCC还在CFR标题47中指定基于不利健康影响的最大暴露电平。这些健康限制是基于在标题47的第2部分(§2.1091和§2.1093)中指定的不同类别的装置来指定的:
移动装置:移动装置被定义为经设计以使用以使得在发射器的辐射结构与用户或附近人员的身体之间正常维持至少20cm的分离距离的发射装置。
便携式装置:便携式装置被定义为经设计以使用以使得装置的辐射结构在用户身体的20厘米内的发射装置。
一般/固定发射器:非便携式或移动装置。
在§2.1093中,规定对于模块或桌上型发射器,装置的潜在使用条件可能不允许容易地将所述装置分类为移动装置或便携式装置。在此类情况下,申请人负责基于SAR、场强度或功率密度(任何一者均是最恰当的)的评估而确定顺从装置的既定使用和安装的最小距离。
暴露限制对于移动装置和一般/固定发射器是相同的,在§1.1310中给出且在表2-8中展示。仅有差别是在确定移动装置的场强度时可能不使用时间平均程序。这意味着下表中的平均时间不适用于移动装置。
针对最大准许暴露(MPE)的限制
f=以MHz为单位的频率
表1的注解1:职业/受控限制适用于以下情形:人员由于其工作而被暴露,假定所述人员完全知晓暴露的可能性且可对其暴露实行控制。对职业/受控暴露的限制还适用于以下情形:当个人路过职业/受控限制适用的位置时,假定他或她知晓暴露的可能性。
表1的注解2:一般人群/未受控暴露适用于以下情形:一般公众可能被暴露,或由于其工作而被暴露的人员可能不完全知晓暴露的可能性或无法对其暴露实行控制。
表2-8FCC暴露限制
下文展示在100kHz与6GHz之间操作的便携式装置的暴露电平:
职业/受控暴露:当人员由于其工作而被暴露时适用,假设其知道所述暴露 | SAR:在整个身体上平均为0.4W/kg且当在任何1g组织上求平均值时空间峰值SAR不超过8W/kg |
一般人群/未受控暴露:当一般公众被暴露时适用 | SAR:在整个身体上平均为0.08W/kg且当在任何1g组织上求平均值时空间峰值SAR不超过1.6W/kg |
世界健康组织(WHO)
WHO已产生了法律保护其公民免受可能产生不利健康影响的高电平EMF暴露的模型。此法令称为电磁场人类暴露法令。
IEEE标准C95.1-2005
IEEE标准C95.1-2005是关于人类暴露于射频电磁场(3kHz-300GHz)的安全电平的标准。其是经ANSI批准并公认的标准。所述标准将不利影响划分为三个不同频率范围:
3kHz-100kHz:与电刺激相关联的效应
100kHz-5MHz:具有与电刺激相关联的效应和加热效应的过渡区
5MHz-300GHz:加热效应
所述建议被划分为两个不同类别:
基本约束(BR):对内部场、SAR和电流密度的限制
对于介于3kHz与5MHz之间的频率,BR指代使由于电刺激引起的不利影响减到最小的对生物组织内的电场的限制。
对于介于100kHz与3GHz之间的频率,BR是基于与在整个身体暴露期间与身体的加热相关联的所确立的健康影响。传统的安全因数10已被应用于上层暴露且50应用于下层暴露。
最大准许暴露(MPE)值:对外部场以及感生和接触电流的限制
对于介于3kHz与5MHz之间的频率,MPE对应于使由于生物组织的电刺激引起的不利影响减到最小。
对于介于100kHz与3GHz之间的频率,MPE对应于空间平均平面波等效功率密度或电场和磁场强度的平方的空间平均值。
对于低于30MHz的频率,为了顺应,E和H场电平两者必须在所提供的限制内。
已经确立了两个不同层的暴露限制:
上层:(在受控环境中人员的暴露)此层表示上部电平暴露限制,低于其则不存在支持可测量风险的科学证据
下层:(一般公众)此层包括认可关于暴露的公众顾虑以及支持与NCRP建议和ICNIRP指导方针相称的额外安全因数。此层解决对所有个体的连续长期暴露的顾虑。
表2-9针对介于3kHz与5MHz之间的频率的BR
e立方体的体积为大约10cm3。
表2-10针对介于100kHz与3GHz之间的频率的BR
表2-11针对介于3kHz与5MHz之间的频率的用于头部和躯体暴露的MPE
表2-12针对介于3kHz与5MHz之间的频率的用于四肢暴露的MPE
表2-13针对介于100kHz与300GHz之间的频率的用于上层的MPE
表2-14针对介于100kHz与300GHz之间的频率的用于下层的MPE
在某些所关注频率(f<30MHz)中,在上层与下层之间在用于磁场强度的MPE限制中不存在差异。
为了确定过渡区(在100kHz与5MHz之间)中的MPE,应考虑针对介于3kHz与5MHz之间的频率的MPE和针对介于100kHz与300GHz之间的频率的MPE两者。应选择那些MPE之间的较多限制性值。这是因为MPE的这两个不同值与针对静电效应的MPE和针对加热效应的MPE有关。
只要不超过BR值,就可超过MPE值。
此标准的观点是可存在实际上高于所指定的限制的场(例如靠近发射回路),只要个人无法暴露于这些场。因此,至少一个实施例可创建高于允许量的场,但仅在用户无法位于的区域中。
NATO已公布了在STANAG 2345下公布的准许暴露电平文献。这些电平可应用于可能被暴露于高RF电平的所有NATO职员。基本暴露电平通常为0.4W/kg。NATO准许暴露电平似乎是基于IEEE C95.1标准且在表2-15中展示。
表2-15NATO准许暴露电平
日本总务省(MIC)也已设定了某些限制。
在日本由MIC设定了RF保护指导方针。在表中展示MIC所设定的限制。日本暴露限制略高于ICNIRP电平,但小于IEEE电平。
暴露类别 | 频率 | E场强度(kV/m) | H场强度(A/m) |
职业 | 10kHz-30kHz | 0.614 | 163 |
30kHz-3MHz | 0.614 | 4.9/f | |
3MHz-30MHz | 1.842/f | 4.9/f | |
一般公众 | 10kHz-30kHz | 0.275 | 72.8 |
30kHz-3MHz | 0.275 | 2.18/f |
暴露类别 | 频率 | E场强度(kV/m) | H场强度(A/m) |
3MHz-30MHz | 0.824/f | 2.18/f |
表2-16日本MIC RF暴露限制(f以MHz为单位)
健康加拿大辐射保护局已确立了针对暴露于射频场的安全指导方针。所述限制可参见安全规程6:在从10kHz到300GHz的频率处暴露于射频场的限制。所述暴露限制是基于两个不同类型的暴露:
职业:对于在射频场源上工作的个人(每天8小时、每周5天)
安全因数为可能造成伤害的最低暴露电平的十分之一。
一般公众:对于可能每天24小时、每周7天被暴露的个人。
安全因数为可能造成伤害的最低暴露电平的五十分之一。
所述限制被划分为两个不同类别:
基本约束:适用于距源至少0.2m的距离或在介于100kHz到10GHz之间的频率处。
条件 | SAR限制(W/kg) |
在整个身体质量上求平均值的SAR | 0.4 |
在任何1克(g)组织上求平均值的针对头部、颈部和躯体的局部SAR | 8 |
在10g组织上求平均值的四肢中的SAR | 20 |
表2-17安全规程6基本约束-职业
条件 | SAR限制(W/kg) |
在整个身体质量上求平均值的SAR | 0.08 |
在任何1克(g)组织上求平均值的针对头部、颈部和躯体的局部SAR | 1.6 |
在10g组织上求平均值的四肢中的SAR | 4 |
表2-18安全规程6基本约束-一般公众
ο暴露限制:
*功率密度限制在大于100MHz的频率下适用。
注解:1.频率f以MHz为单位。
2.10W/m2的功率密度等效于1mW/cm2。
3.1A/m的磁场强度对应于1.257微特(μT)或12.57毫高斯(mG)。
表2-19安全规程6暴露限制-职业
*功率密度限制在大于100MHz的频率下适用。
注解:1.频率f以MHz为单位。
2.10W/m2的功率密度等效于1mW/cm2。
3.1A/m的磁场强度对应于1.257微特(μT)或12.57毫高斯(mG)。
表2-20安全规程6暴露限制-一般公众
从上文中清楚,不同管理团体界定不同限制。一个原因是缺乏关于健康影响的知识以及专家间意见不同。
发明人认识到,实际装置应当遵守所有不同机构要求,以避免出售例如当用户在休假中携带时可能不合法的单元。USA具有FCC规章。欧洲使用ETSI和CENELAC。上文中已描述了其它规章。
发明人认识到,为了有效地制造单元,其必须在许多不同国家中可用。举例来说,假如制造了(例如)在某个国家中不可用的单元,那么所述单元在任何时候均不能在休假中携带,等等。这将是完全不切实际的。因此,根据一实施例,制造与所有这些要求对应的天线和实际装置。
一个实施例可使用通过保持低于主要国家(例如US和欧洲)的电平而允许在所述两个国家中操作的系统。另一实施例可基于位置来改变所递送功率的量,例如通过所输入的国家代码或通过编码放置于单元上的电尖端(例如当使用US电尖端时自动采用US安全标准)。
针对非电离辐射的暴露限制可设定为如包括FCC、IEEE和ICNIRP的若干组织所界定。可针对来自指定国家而非来自其它国家的限制设定限制。
对于对小型便携式装置的邻近功率发射,用于“近程装置”的当前频率规章可允许在<0.5m的距离上进行高达数百mW的功率转移。
在<3m的距离上进行数百mW的远程功率转移可能需要比当前评频率规章所指定的场强电平高的场强电平。然而,可能能够满足暴露限制。
在13.56MHz+/-7kHz处的频带(ISM频带)和低于135kHz的频率(LF和VLF)可能适合于发射无线功率,因为这些频带具有良好的值。
然而,在135kHz处的准许场强电平相对较低,这考虑到将在LF处需要比在13.56MHz处高20dB的H场强度来发射相同量的功率的事实。
虽然上文已经详细揭示了仅几个实施例,但其它实施例也是可能的,且发明人希望这些实施例涵盖在本说明书内。说明书描述用以实现可以另一方式实现的较一般目标的具体实例。此揭示内容既定为示范性的,且权利要求书既定涵盖所属领域的一般技术人员可能可预测到的任何修改或替代。举例来说,可使用其它尺寸、材料和连接。其它实施例可使用所述实施例的类似原理,且同样等效地适用于主要静电和/或电动力场耦合。大体上,可使用电场来代替磁场作为主要耦合机制。而且,可考虑其它值和其它标准来形成用于发射和接收的正确值。
而且,发明人希望仅使用词“用于...的装置”的那些权利要求既定根据35USC 112第六节来解释。此外,不希望来自说明书的任何限制对任何权利要求添加另外的意义,除非那些限制明确地包含于权利要求中。
在本文提到特定数字值的情况下,应认为,所述值可增加或减少20%,同时仍保留在本申请案的教示内,除非具体提到某种不同的范围。在使用指定的逻辑意义的情况下,还既定涵盖相反的逻辑意义。
Claims (14)
1.一种方法,其包含:
形成无线功率转移系统,所述无线功率转移系统使用磁谐振元件且其具有经设定以遵守由组织设定的对应于一个以上国家标准的标准的值。
2.根据权利要求1所述的方法,其中所述标准组织包括USA管理机构和至少一个其它管理机构。
3.根据权利要求2所述的方法,其中所述至少一个其它机构包括欧洲机构。
4.根据权利要求1所述的方法,其中在13.56MHz+/-7kHz处实行所述无线功率转移。
5.根据权利要求1所述的方法,其中在低于135kHz处实行所述无线转移。
6.根据权利要求1所述的方法,其中所述无线功率转移系统创建高于所述标准所允许的场但仅在人无法位于的区域中高于那些标准的场。
7.根据权利要求1所述的方法,其中所述无线功率转移系统创建处于基于生物学效应和对其它电子装置的干扰效应两者的电平处的场。
8.一种无线功率转移系统,其包含:
发射器,其创建处于遵守由与第一国家相关联的第一标准组织设定的第一电平且还遵守由与不同于所述第一国家的第二国家相关联的第二标准组织设定的第二电平的电平处的功率场。
9.根据权利要求8所述的系统,其中所述发射器还遵守由第三国家提出的第三标准组织设定的第三标准。
10.根据权利要求8所述的系统,其中所述标准遵守US标准且遵守欧洲标准。
11.根据权利要求8所述的系统,其中所述无线功率转移在13.56MHz+/-7kHz处实行。
12.根据权利要求8所述的系统,其中所述无线功率转移在低于135kHz处实行。
13.根据权利要求8所述的系统,其中所述发射器创建高于所述标准的电平但仅在用户无法位于的区域中较高的电平。
14.根据权利要求8所述的系统,其中所述标准是针对生物学效应且还针对干扰效应的标准。
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- 2008-09-18 KR KR1020107008432A patent/KR20100072264A/ko not_active IP Right Cessation
- 2008-09-18 KR KR1020137002393A patent/KR101515727B1/ko active IP Right Grant
- 2008-09-18 CN CN200880107644A patent/CN101803110A/zh active Pending
- 2008-09-18 JP JP2010525979A patent/JP2010539887A/ja not_active Withdrawn
- 2008-09-18 CN CN201710141795.1A patent/CN107154534A/zh active Pending
- 2008-09-18 EP EP08832129.4A patent/EP2198477B1/en active Active
- 2008-09-18 KR KR1020137002392A patent/KR101502248B1/ko active IP Right Grant
- 2008-09-18 EP EP17179015.7A patent/EP3258536A1/en not_active Withdrawn
- 2008-09-18 WO PCT/US2008/076899 patent/WO2009039308A1/en active Application Filing
-
2013
- 2013-06-10 JP JP2013121729A patent/JP5889835B2/ja active Active
- 2013-06-21 US US13/924,324 patent/US20130278211A1/en not_active Abandoned
Cited By (5)
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CN103094994A (zh) * | 2011-11-08 | 2013-05-08 | 索尼公司 | 磁耦合单元和磁耦合系统 |
CN103094994B (zh) * | 2011-11-08 | 2016-08-03 | 索尼公司 | 磁耦合单元和磁耦合系统 |
US11777328B2 (en) | 2015-09-16 | 2023-10-03 | Energous Corporation | Systems and methods for determining when to wirelessly transmit power to a location within a transmission field based on predicted specific absorption rate values at the location |
CN109041586A (zh) * | 2015-12-29 | 2018-12-18 | 艾诺格思公司 | 用于在无线电能传输系统中生成功率波的系统及方法 |
CN109041586B (zh) * | 2015-12-29 | 2024-01-05 | 艾诺格思公司 | 用于在无线电能传输系统中生成功率波的系统及方法 |
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EP2198477A4 (en) | 2014-01-15 |
EP3258536A1 (en) | 2017-12-20 |
CN107154534A (zh) | 2017-09-12 |
KR20130026496A (ko) | 2013-03-13 |
EP2198477A1 (en) | 2010-06-23 |
KR101502248B1 (ko) | 2015-03-12 |
JP2013243921A (ja) | 2013-12-05 |
KR20100072264A (ko) | 2010-06-30 |
JP5889835B2 (ja) | 2016-03-22 |
JP2010539887A (ja) | 2010-12-16 |
US8614526B2 (en) | 2013-12-24 |
KR20130029109A (ko) | 2013-03-21 |
US20130278211A1 (en) | 2013-10-24 |
EP2198477B1 (en) | 2017-07-05 |
KR101515727B1 (ko) | 2015-04-27 |
US20090102292A1 (en) | 2009-04-23 |
WO2009039308A1 (en) | 2009-03-26 |
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