CN104937810A - Wireless power receiving apparatus capable of improving efficiency and power delivery using modulation of effective load resistance of receiving end - Google Patents

Wireless power receiving apparatus capable of improving efficiency and power delivery using modulation of effective load resistance of receiving end Download PDF

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Publication number
CN104937810A
CN104937810A CN201280078160.7A CN201280078160A CN104937810A CN 104937810 A CN104937810 A CN 104937810A CN 201280078160 A CN201280078160 A CN 201280078160A CN 104937810 A CN104937810 A CN 104937810A
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wireless power
modulation
receiving apparatus
unit
resistance
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CN201280078160.7A
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Chinese (zh)
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CN104937810B (en
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洪圣喆
安德柱
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韩国科学技术院
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Priority to KR1020120148249A priority Critical patent/KR101390954B1/en
Priority to PCT/KR2012/011077 priority patent/WO2014098279A1/en
Priority to KR10-2012-0148249 priority
Publication of CN104937810A publication Critical patent/CN104937810A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J5/00Circuit arrangements for transfer of electric power between ac networks and dc networks
    • H02J5/005Circuit arrangements for transfer of electric power between ac networks and dc networks with inductive power transfer

Abstract

Disclosed are a wireless power receiving apparatus capable of improving power delivery using a modulation of an effective load resistance of a receiving end, and a wireless power delivery system using said apparatus. A receiving unit of the wireless power receiving apparatus receives power from a wireless power transmitter. A rectifying circuit unit rectifies the current outputted from the receiving unit and outputs the rectified current. A load resistance modulation unit receives a control signal including a duty ratio, controls the flow of the current applied from the rectifying circuit unit according to the received control signal so as to vary the size of the effective load resistance, and increases the size of the equivalent resistance so as to improve efficiency.

Description

能够通过调制接收端的有效负载电阻提高效率及功率传送的无线功率接收装置 Wireless power receiving apparatus can be effectively transmitted through a load resistance and improve the efficiency of power modulation receiving end

技术领域 FIELD

[0001] 本发明涉及一种无线功率传送系统,并尤其涉及一种通过调制接收端的有效负载电阻来提高功率传送的无线功率接收装置。 [0001] The present invention relates to a wireless power transfer system, and in particular to improve the power transfer wireless power receiving apparatus relates to an effective load resistance modulation receiver.

背景技术 Background technique

[0002] 无线功率传送系统通常包括传送装置DC电源、传送装置谐振逆变器、传送谐振器、接收谐振器、整流电路单元、以及功率变换器。 [0002] Wireless power transfer system generally comprises a DC power transmission apparatus, transmission apparatus resonant inverter, transmission resonator, a resonator receiver, rectifier circuit unit, and a power converter. 为了在低耦合与小谐振器的限制下提供高效率,需要相应地优化接收装置的负载电阻。 In order to provide high efficiency at low limit coupled with small resonators, it is necessary to optimize the load resistance corresponding receiving apparatus.

[0003] 除了效率之外,也需要传送比接收装置所需功率的更高的功率的能力。 [0003] In addition to efficiency, higher than the capacity of the power reception device also needs to transmit the required power. 尤其是,当传送装置与接收装置之间存在长距离时,难以向接收装置提供足够的功率。 In particular, when there is a long distance between the transmitting device and the receiving device, it is difficult to provide sufficient power to the receiving device. 除了距离之外, 负载电阻也影响着功率传送。 In addition to distance, the load resistor also affects the power transfer. 于是,为了以高效率向接收装置传送期望的功率,需要适当地选择负载电阻。 Accordingly, in order to efficiently deliver the desired power to the receiving means, the load resistance needs to be appropriately selected.

[0004] 问题在于难以自由地改变负载电阻。 [0004] The problem that it is difficult to freely change the load resistance. 负载电阻是由实际消耗功率的装置的功率需求决定的,并且不是系统的设计变量。 Load resistance is determined by the actual power demand of the power consuming device, and not the system design variables. 当使用阻抗变换电路时,能够变换从接收谐振器观测的有效负载电阻,并提尚性能。 When using the impedance conversion circuit, resistors can be converted payload receiver viewed from the resonator, and still provide performance.

[0005] 然而,典型的阻抗变换电路已经具有固定的变换比,不能自由地改变阻抗变换比。 [0005] However, the typical impedance conversion circuit has a fixed transformation ratio can not freely change the impedance conversion ratio.

[0006] 在这种情况下,存在这样的限制,即,在特定的距离或特定的负载电流的条件下, 能够优化性能,但是当距离改变或负载电流改变时,性能下降,并且系统变得不稳定。 [0006] In this case, there is a limit, i.e., at a particular distance or the particular load current, to optimize performance, but when the distance is changed or the load current changes, performance degradation, and the system becomes instability.

[0007] 典型的接收装置后部的功率变换电路仅具有在接收比所需功率更高的功率时限制功率的功能。 [0007] The rear portion of the power conversion circuit having a reception device typically limit the power required at the time of receiving higher power than the function only. 因而,当接收的功率小于所需功率时,实际上难以充分地向负载电阻器提供期望的功率。 Thus, when the received power is less than the required power, it is actually difficult to sufficiently provide the desired power to the load resistor.

[0008] 在名为"无线功率传送中的自适应阻抗调谐"的美国专利申请US2010/0277003A1 中,通过使用DC-DC逆变器来改变接收装置电阻的目的在于控制功率,而不是增加效率。 [0008] in U.S. Patent entitled "Adaptive Wireless power transfer impedance tuning" Application US2010 / 0277003A1, by using a DC-DC inverter to change the resistance of object receiving means is to control the power, instead of increasing efficiency. 该专利申请为了增加或降低输出功率而主张了不同的控制方法以及输出/输入功率感测方法。 This patent application for an increase or decrease output power advocated different control methods, and an output / input power sensing method. 然而,其目的在于功率传递控制而不是增加效率。 However, an object to control instead of increasing the power transfer efficiency. 该专利申请描述了当通过使用这些方法来增加传送的功率时不必增加效率。 This patent application describes that when increasing the power transmitted by using these methods without increasing the efficiency.

[0009] 相反,本专利申请的目标在于在功率转换电路的辅助下提高谐振器的效率,而不是控制功率。 [0009] In contrast, the object of the present patent application is to improve the efficiency of the resonator with the aid of a power conversion circuit, instead of controlling power. 即使所提出的接收装置在相同距离处接收相同的功率,由于接收装置在其反射电阻已被放大的状态下运行,所以接收装置也具有高效率。 Even if the proposed receiving apparatus receives the same power at the same distance, since the receiving device operates in its reflective state resistance has been amplified, the receiving apparatus has high efficiency. 与不加入所提出的负载电阻调制单元相比,所提出的负载电阻调制单元的加入提供了更高的效率。 Compared with no addition of the proposed modulation unit load resistor, the load resistor is added the proposed modulation unit provides higher efficiency.

发明内容 SUMMARY

[0010] 技术问题 [0010] Technical issues

[0011] 本发明的目的在于提供一种通过调制接收端的有效负载电阻来提高功率传递的无线功率传送系统,该无线功率传送系统可解决如下限制:在特定的距离或特定的负载电流的情况下,能够优化性能,但当距离改变或负载电流改变时,由于典型的无线功率传送系统中使用的典型的阻抗变换电路不能自由地改变阻抗变换比,且已具有固定的变换比,所以性能下降,并且系统变得不稳定。 [0011] The object of the present invention is to provide a wireless power transfer system to increase the power transfer through a modulation resistor payload receiving end, the wireless power transfer system solves the following restrictions: In the case of certain specific distance or the load current , to optimize performance, but the distance is changed or the load current changes, typically due to the impedance conversion circuit of a typical wireless power transfer system can not be used to freely change the impedance conversion ratio, and has a fixed transformation ratio, the performance degradation, and the system becomes unstable.

[0012] 技术方案 [0012] Technical Solution

[0013] 为了达到上述目的,本发明提供一种无线功率接收装置,该无线功率接收装置包括:接收单元,其从功率传送装置接收功率;整流电路单元,其对从所述接收单元输出的电流进行整流,并输出所整流的电流;以及负载电阻调制单元,其接收具有占空比的控制信号,根据所接收的控制信号调节从所述整流电路单元提供的所述电流以改变有效负载电阻的大小,并增加反射电阻的大小以提高效率。 [0013] To achieve the above object, the present invention provides a wireless power receiving apparatus, the wireless power receiving apparatus comprising: a receiving unit that receives power from the power transmitting device; a rectifying circuit means, its current output from the receiving unit rectifies and outputs the rectified current; and a load resistor modulation unit, which receives a control signal having a duty ratio control signal adjusts the current received from the rectifier circuit means is provided to change the effective load resistance size, and increase the size of the resistance to increase reflection efficiency.

[0014] 有益效果 [0014] beneficial effects

[0015] 根据本发明,存在如下优点:能够通过将有效负载电阻向接收装置的加载Q值增加的方向改变,并且通过增大反射到传送装置的反射电阻来增加整个系统的效率以及输出功率。 [0015] According to the present invention, there is an advantage: the Q value can be changed to a load receiving means by the direction of increasing the effective load resistance, and to increase the efficiency and output power of the entire system by increasing the resistance reflected into a delivery device.

[0016] 另外,由于能够在无线功率传送装置与无线功率接收装置之间存在长距离,并由此输出功率降低到小于或等于负载电阻器所需要的功率时增加反射电阻,因此存在能够维持较长距离情况下的相同的效率和输出功率的优点。 Increase the reflectance when the resistance [0016] Further, since there can be a long distance between the wireless power transmission apparatus and the wireless power receiving apparatus, and thereby reducing the output power less than or equal to the power required for the load resistor, so there can be maintained more the same output power and efficiency advantages in long distances.

附图说明 BRIEF DESCRIPTION

[0017] 图1 (a)及1 (b)示出串联的接收谐振器与反射电阻器之间的相关性。 [0017] FIG. 1 (a) and 1 (b) shows a correlation between the series resonator and the reflector receiver resistor.

[0018] 图2(a)及2(b)示出并联的接收谐振器与反射电阻器之间的相关性。 [0018] FIG. 2 (a) and 2 (b) shows the correlation between the parallel resonator and the reflector receiver resistor.

[0019] 图3是根据本发明的实施例的无线功率传送系统的框图。 [0019] FIG. 3 is a block diagram of a wireless power transfer system according to embodiments of the present invention.

[0020] 图4是图3中的整流电路图的示例。 [0020] FIG. 4 is a circuit diagram showing an example of the rectifier 3 of FIG.

[0021] 图5示出本发明的负载电阻调制单元的第一实施例的第一调制电路(升压(boost)型调制电路)。 A first modulation circuit of the first embodiment [0021] FIG. 5 shows a load resistor modulation unit according to the present invention (boost (Boost) type modulation circuit).

[0022] 图6示出本发明的负载电阻调制单元的第二实施例的第二调制电路(升压型调制电路)。 A second modulation circuit of the second embodiment [0022] FIG. 6 shows a load resistor modulation unit according to the present invention (step-modulation circuit).

[0023] 图7示出本发明的负载电阻调制单元的第三实施例的第三调制电路(SEPIC型调制电路)。 [0023] FIG. 7 shows a third modulating circuit (SEPIC type modulation circuit) of the load resistor of the third embodiment of the present invention modulating unit.

[0024] 图8示出本发明的负载电阻调制单元的第四实施例的第四调制电路(降压(buck) 型调制电路)。 [0024] FIG. 8 shows a fourth modulation circuit (step-down (Buck) type modulation circuit) of the load resistor of the fourth embodiment of the present invention modulating unit.

[0025] 图9示出本发明的负载电阻调制单元的第五实施例的第五调制电路(接收脉动DC 电压输入的回扫调制电路(flybackmodulationcircuit))。 [0025] FIG. 9 shows a fifth embodiment of the load resistor modulation unit according to the invention a fifth modulation circuit (voltage input receives the pulsating DC flyback modulation circuit (flybackmodulationcircuit)).

[0026] 图10示出本发明的负载电阻调制单元的第六实施例的第六调制电路(降压-升压-级联(cascade)型调制电路)。 [0026] FIG. 10 shows a sixth embodiment of the load modulation resistor of the present invention means a sixth modulation circuit (buck - boost - Cascade (Cascade) type modulation circuit).

[0027] 图11 (a)及11 (b)是当本发明的接收单元包括串联谐振结构以及并联谐振结构时为了增加反射电阻而经由调制负载电阻来等同地对接收单元执行串联或并联的转换的示例。 [0027] FIG. 11 (a) and 11 (b) when the receiving unit according to the present invention comprises a series resonant structure and the parallel resonant structure In order to increase the reflectance of the resistance via the modulation load resistor equivalently converting the reception unit performs series or in parallel examples.

[0028] 图12是图3中的无线功率接收装置的操作方法的流程图。 [0028] FIG. 12 is a flowchart of a method of operating a wireless power receiving apparatus 3 in FIG.

[0029] 图13是图3中的无线功率传送系统的操作方法的流程图。 [0029] FIG. 13 is a flowchart of a method of operating a wireless power transfer system in FIG.

[0030] 图14(a)是本发明及现有技术中传送功率相对于无线功率传送装置与无线功率接收装置之间的距离的曲线图,并且图14(b)是根据本发明与现有技术的传送功率相对于传送装置与接收装置之间的距离的曲线图。 [0030] FIG. 14 (a) is a graph showing transmission power with respect to the distance between the wireless power transmission apparatus and the wireless power receiving apparatus of the present invention and the prior art, and FIG. 14 (b) it is in accordance with the present invention with the prior art transmission power versus the distance between the transmitting and receiving devices. ("负载调制"代表本发明并且"仅整流器"代表现有技术。) ( "Load modulation" and the representative of the present invention "merely rectifier" representative of the prior art.)

[0031] 图15(a)是根据本发明及现有技术的当输出是21. 6W时的效率相对于距离的曲线图,并且图15(b)是在本发明与现有技术中当输出是10. 9W时的效率相对于距离的曲线图。 [0031] FIG. 15 (a) according to the present invention and the prior art when the output is at 21. 6W efficiency versus distance, and FIG. 15 (b) in the present invention, when the output of the prior art 10. 9W when the efficiency versus distance. ("调制的负载"代表本发明并且"仅整流器"代表现有技术。) ( "Load modulation" and the representative of the present invention "merely rectifier" representative of the prior art.)

具体实施方式 Detailed ways

[0032] 以下,参照附图来详细说明本发明的示例性实施例。 [0032] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference. 在说明本发明时,为了不必要地模糊本发明的主题,将省略与已知功能或结构相关的详细说明。 In describing the present invention, in order to unnecessarily obscure the subject matter of the present invention, a detailed description related to known functions or configurations will be omitted.

[0033] 由于本发明可以做出不同的变形例并具有若干实施例,因此将在图中示出特定的实施例,并且在本发明或申请中将详细说明特定的实施例。 [0033] As the present invention may be made having different modification and several embodiments will be illustrated specific embodiments in the drawings and specific embodiments or described in detail in the present application. 然而,并不旨在将本发明限制在特定的实施例,并且应理解,本发明覆盖落入本发明的精神和范围之内的所有的变形例、等同物、和/或替代物。 However, it is not intended to limit the invention to the specific embodiments, and it should be understood that the present invention covers all modifications falling within the spirit and scope of the present invention, equivalents, and / or replacement.

[0034] 当提到任何元件与另一元件"连接"或"接入"时,应理解,前者与后者可直接连接或接入,或者在两者之间可存在另一元件。 [0034] When referring to any element from another "connected" or "accessed", it should be understood that the former and the latter may be directly connected or accessed, or there may be another element therebetween. 反过来,当任何元件被称为与另一元件'直接连接'或'直接接入'时,应理解,两者之间可以没有其他元件。 Conversely, when an element is referred to any other element 'directly connected' or 'directly connected', to be understood that no other element in between. 诸如"位于……之间"、"直接位于……之间"或"与……相邻"、及"与……直接相邻"之类的用于说明元件间的关系的其他表述也应当以相同的方式解释。 Such as "located between ......", "directly between ......" or "adjacent to the ......", and "...... directly adjacent to the" like other representation for explaining the relationship between elements should interpreted in the same way.

[0035] 本发明中使用的术语仅用于说明特定的实施例,并不旨在限制本发明。 The term used in the invention [0035] The present embodiment is only for describing particular embodiments, not intended to limit the present invention. 除非另有说明,否则,单数形式的术语包括复数形式。 Unless otherwise stated, the singular forms include the plural forms of the terms. 应理解,本发明中,术语"包括"或"具有"表明特征、数字、步骤、操作、元件、部件、或其组合的存在,但是,并不排除一个或更多其他的特征、数字、步骤、操作、元件、部件、或其组合的存在或添加。 It should be understood, the present invention, the term "comprising" or "having," stated features, integers, steps, operations, elements, components, or combinations thereof, however, does not exclude one or more other features, integers, steps , operations, elements, components, or a combination of the presence or addition.

[0036] 以下,通过参照附图来更详细地说明本发明。 [0036] Hereinafter, the present invention will be described with reference to the drawings in more detail.

[0037] 在说明本发明之前,可以通过下面的方程式1来表示无线功率传送装置中的等效电阻的大小: [0037] Before describing the present invention, by the size of the equivalent resistance of the wireless power transmission apparatus 1 is represented in the following equation:

[0038] [方程式1] [0038] [Equation 1]

[0039] Rreflected -k [0039] Rreflected -k

[0040] 在本示例中,k表示传送装置中的传送线圈与接收装置中的接收谐振器之间的耦合系数,1^表示传送线圈的电感,QKX代表接收谐振器的加载Q值(loaded-©,《 ^是谐振器的谐振频率及逆变器开关频率,传送线圈与接收装置之间的耦合的影响由单个等效电阻Rreflected^^'J、° [0040] In the present example, k is the coupling coefficient between the transmitting coil and the receiving apparatus transmitting apparatus receives the resonator, a Q value of the inductor loading ^ represents, QKX behalf transmission coil receiver resonator (loaded- ©, "^ is the resonant frequency and the inverter switching frequency of the resonator, the effects of coupling between the transmitting coil and a receiving device by a single equivalent resistance Rreflected ^^ 'J, °

[0041] 因为接收装置的影响被反射到传送线圈,所以将等效电阻为反射电阻。 [0041] because of the impact receiving means is reflected to the transmitting coil, the equivalent resistance of resistor reflection.

[0042]如图1 (a)至2(b)所示,反射电阻Rrrfl_d与传送线圈L:的寄生电阻器RTXpaMsiti。 [0042] FIG. 1 (a) to 2 (b), the reflection and transmission coil resistance Rrrfl_d L: parasitic resistor RTXpaMsiti. 串联连接。 Connected in series. 由此,高效率与高输出的条件是增大反射电阻RMflK;tral。 Thus, conditions of high efficiency and high output resistance is to increase the reflection RMflK; tral.

[0043] 反射电阻取决于由接收谐振器的负载电阻决定的QKX(见方程式1)。 [0043] reflection QKX dependent resistance load resistor determined by the receiver resonator (see equation 1).

[0044] 在串联谐振接收装置的情况下,加载Q值及反射电阻随负载电阻&降低而增加(见图1),并且在并联谐振接收装置的情况下,加载Q值以及反射电阻RMflertral随负载电阻Rt增加而增加(见图2)。 [0044] In the case where the series resonant receiving apparatus, the Q value and the reflection loading resistance with increasing load resistance & decreased (see FIG. 1), and in the case of the parallel resonance receiving means, and a reflecting load Q value with the load resistor RMflertral resistance Rt increases (see FIG. 2).

[0045] 因而,本发明经由负载电阻调制电路来改变有效负载电阻及接收谐振器的反射电阻的大小,以增加传送功率的效率以及传送功率。 [0045] Accordingly, the present invention is to change the size of the effective load resistance reflected resistance and a receiver resonator modulation circuit via a load resistor, to increase the efficiency of the transmission power and transmission power.

[0046] 图3是根据本发明的实施例的无线功率传送系统的框图。 [0046] FIG. 3 is a block diagram of a wireless power transfer system according to embodiments of the present invention. 图4是图3中的整流器的电路图的示例。 FIG 4 is a circuit diagram showing an example of the rectifier 3 of FIG.

[0047] 如图3所示,本发明的无线功率传送系统300包括无线功率传送装置100以及无线功率接收装置200。 [0047] As shown, the wireless power transmission system 300 of the present invention 3 comprises a wireless power transmission apparatus 100 and the wireless power receiving apparatus 200.

[0048] 无线功率传送装置100传送功率。 [0048] The wireless power transmission apparatus 100 transmits power. 无线功率传送装置100包括DC电源以及传送谐振单元,并且起到经由传送谐振单元中的电感器U将从DC电源产生的功率传送到外部的作用。 Wireless power transmission apparatus 100 includes a DC power source and a transmission resonance unit, and serves the role of power transfer to the outside from the DC power supply generates U via the transmission resonance of the inductor unit.

[0049] 为了提高无线功率的传送效率,无线功率接收装置200调节反射电阻的大小。 [0049] In order to improve efficiency of wireless power transmission, the wireless power receiving apparatus 200 adjusting the size of the reflection resistance.

[0050] 更具体地,无线功率接收装置200包括接收单元120、整流电路单元130、以及负载电阻调制单元140。 [0050] More specifically, the wireless power receiving apparatus 200 includes a receiving unit 120, a rectifying circuit unit 130, modulation unit 140, and a load resistor.

[0051] 接收单元120从无线功率传送装置接收功率。 [0051] The receiving unit 120 receives the power transmitted from the wireless device power.

[0052] 整流电路单元130对从接收单元120输出的电流进行整流,并输出所整流的电流。 [0052] The rectification circuit unit 130 receives the current output from the rectifying unit 120, and outputs the rectified current.

[0053] 负载电阻调制单元140接收包含占空比的控制信号,根据所接收的控制信号CNT 来调节从整流电路单元130提供的电流以改变有效负载电阻的大小,并调节功率传送装置中的反射电阻的大小,以便提高效率。 [0053] The modulation unit 140 receives a load resistor comprises a duty ratio control signal to adjust the current from the rectifier circuit module 130 provided in accordance with the received control signal CNT to change the magnitude of the effective load resistance and adjust the reflected power transmission apparatus the magnitude of the resistance, to improve efficiency.

[0054] 控制信号CNT控制负载电阻调制单元140的操作,具体地,控制信号CNT是具有固定或可变的占空比的脉冲信号,其有规律地接通/关断负载电阻调制单元140中的开关器件。 [0054] The control signal CNT controls the operation load resistor modulation unit 140, specifically, the control signal CNT is a pulse signal having a fixed or variable duty cycle, which is regularly turned 140 on / off modulation unit load resistance the switching device.

[0055] 接收单元120可被配置成如下结构:电感器L与电容器C串联、并联、或串联及并联连接。 [0055] The receiving unit 120 may be configured to have a structure: an inductor L and a capacitor C connected in series, parallel, or in series and parallel connection. 参照下面的图10来提供更具体的说明。 Referring to FIG. 10 to provide the following more particular description.

[0056] 接下来,参照图4,整流电路单元130包括第一整流单元131、第二整流单元132、及整流电路单元输出滤波器133。 [0056] Next, referring to FIG. 4, a first rectifier circuit module 130 includes a rectification unit 131, a second rectifier unit 132, and the rectifier circuit output filter unit 133. 整流电路单元130从接收单元120接收所整流的电流,并将所接收的电流提供到负载电阻调制单元140。 Rectification circuit unit 130 receiving unit 120 receives current from the rectified current, and the received modulation unit 140 to a load resistor.

[0057] 第一整流单元131包括经由第一节点N1串联连接的两个二极管D,第二整流单元132包括经由第二节点N2串联连接的两个二极管D,并且第一整流单元131与第二整流单元132并联连接。 [0057] The first unit 131 comprises two rectifying diodes D connected in series via a first node N1, a second rectifier unit 132 comprises two diodes D connected in series via a second node N2, and a first rectifier unit 131 and the second rectifying unit 132 are connected in parallel. 另外,整流电路单元130与整流电路单元输出滤波器C并联连接。 Further, the rectifier circuit unit 130 is connected in parallel with the rectifying circuit unit output filter C.

[0058] 从接收单元120提供的交流电流经由第一整流单元131的整流器件(二极管)而在整流电路单元130的输出滤波器C中被输出为直流电流。 [0058] The receiving unit 120 from the alternating current supplied via the first rectifier unit rectifying element 131 (diode) is output as a direct current output of rectifying circuit section C 130 of the filter.

[0059] 负载电阻调制单元140起到调节从整流电路单元130提供的电流以改变负载电阻&的大小的作用。 [0059] The modulation unit 140 functions as a load resistance regulating circuit current from the rectifying unit 130 to change the size of the load resistor & effect. 更具体地,其调节从整流电路单元130提供的电流以便增大或降低有效负载电阻的大小。 More specifically, it regulates the current from the rectification circuit unit 130 so as to increase or decrease the size of the payload resistance.

[0060] 图5示出本发明的负载电阻调制单元的第一实施例的第一调制电路(升压型调制电路)。 A first modulation circuit of the first embodiment [0060] FIG. 5 shows a load resistor modulation unit according to the present invention (step-modulation circuit).

[0061] 更具体地,如图5所示,负载电阻调制单元140根据接收单元120中的电感器L与电容器C的连接结构而有所不同,在串联连接结构的情况下,负载电阻调制单元140包括第一调制电路210、第二调制电路220、或第三调制电路230,并且在并联连接结构的情况下, 负载电阻调制单元140包括第四调制电路240、第五调制电路250、或第六调制电路260。 [0061] More specifically, as shown in FIG modulation unit load resistor 140 is connected varies according to the structure of the inductor L and the capacitor C in the reception unit 1205, in the case of series connection structure, the load resistance modulating unit modulation circuit 210 comprises a first 140, a second modulation circuit 220, the modulation circuit 230 or the third, and in the case of parallel connection structure, the load modulation unit 140 includes a fourth resistor modulation circuit 240, a fifth modulation circuit 250, or the six modulation circuit 260.

[0062] 第一调制电路210可以是包括电感器211、第一开关器件212、第二开关器件213、 以及电容器214的升压型电路。 [0062] 210 may be a first modulation circuit 211 comprises an inductor, a first switching device 212, a second switching device 213, a capacitor 214 and a step-up circuit.

[0063] 更具体地,电感器211的一端连接到整流单元,并且其另一端连接到第三节点N3。 [0063] More specifically, one end of the inductor 211 is connected to the rectifying means, and the other end connected to the third node N3. 第一开关器件212的漏极端子连接到第三节点N3,并且其源极端子连接到第四节点N4。 The drain terminal of the first switching device 212 is connected to the third node N3, and its source terminal connected to the fourth node N4. 第二开关器件213的一端连接到第三节点N3,并且其另一端连接到第五节点N5。 End of the second switching device 213 is connected to the third node N3, and the other end connected to the fifth node N5.

[0064] 控制信号CNT是脉冲信号,其被提供到第一开关器件212的栅极端子。 [0064] The control signal CNT is a pulse signal, which is supplied to the first switching device 212 is a gate terminal. 控制信号CNT的占空比可具有固定的值或根据负载电阻器的输出电压而变化。 Duty cycle of the control signal CNT may have a fixed value or the output voltage varies depending on load resistor.

[0065] 第一开关器件212与第二开关器件213交替接通。 [0065] a first switching device 212 are alternately turned on and the second switching device 213.

[0066] 当第一开关器件212接通时,电感器211中流动的电流逐渐累加。 [0066] When the first switching device 212 is turned on, the current flowing in inductor 211 gradually accumulated. 电感器中流动的电流经由第一开关器件212和整流电路单元130而逐渐累加。 Current flowing in the inductor is gradually accumulated via the first switching device 212 and the rectifying circuit unit 130.

[0067] 当第一开关器件212关断时,第三节点N3的电压增加,并且一旦电压等于或高于第二开关器件213的阈值电压,则第二开关器件213接通。 [0067] When the first switching device 212 is turned off, the voltage of the third node N3 increases, and once the second switching voltage is equal to or higher than the threshold voltage of the device 213, the second switching device 213 is turned on. 因而,电感器211中流动的电流被提供到负载电阻器 Thus, the current flowing in the inductor 211 is supplied to a load resistor

[0068] 随着在整个开关周期期间第一开关器件212被接通的比例(例如占空比)增大, 逐渐累加的电流增大,输入到调制器210的电阻降低,并且因为输入到第一调制电路210的电阻是有效负载电阻,所以反射电阻增加。 [0068] With the ratio 212 (e.g. duty cycle) of the first switching device is turned on during the entire switching cycle is increased, the accumulated current increases gradually, to a modulator input 210 to reduce the resistance, and because the input to a modulation circuit 210 is effective resistance load resistor, the reflected resistance increases.

[0069] 因而,第一调制电路210根据控制信号CNT(脉冲信号)的占空比来调节电流,使得与典型的负载电阻相比,输入电阻降低,以增加无线功率传送装置100中的反射电阻。 [0069] Accordingly, a first modulation circuit 210 to adjust the current according to the duty control signal CNT (pulse signal), so that compared to a typical load resistor, the input resistance is reduced to increase the reflectance of the resistance 100 in the wireless power transmission apparatus . 因此,无线功率传送效率以及传送功率增大。 Thus, wireless power transmission efficiency and the transmission power is increased.

[0070] 图6示出本发明的负载电阻调制单元的第二实施例的第二调制电路(升压型调制电路)。 A second modulation circuit of the second embodiment [0070] FIG. 6 shows a load resistor modulation unit according to the present invention (step-modulation circuit).

[0071] 如图6所示,第二调制单元220是代表接收脉动DC电流的升压型电路的示例的电路图。 [0071] As shown in FIG 6, the second modulation unit 220 is a circuit diagram showing an example of the representative of the pulsating DC boost circuit receives current.

[0072] 更具体地,第二调制电路220包括第一开关器件221、第二开关器件222、以及电容器223。 [0072] More specifically, the second modulation circuit 220 includes a first switching device 221, a second switching device 222, and a capacitor 223.

[0073] 第一开关器件221的漏极端子连接到第三节点N3,其栅极端子连接到控制单元170,其源极端子连接到第四节点N4。 [0073] The drain terminal of the first switching device 221 is connected to the third node N3, a gate terminal connected to a control unit 170, a source terminal connected to the fourth node N4.

[0074] 第二开关器件222的一端连接到第三节点N3,并且其另一端连接到第五节点N5。 End of [0074] a second switching device 222 is connected to the third node N3, and the other end connected to the fifth node N5. 电容器223与第二开关器件222并联连接。 A second switching device 223 and a capacitor 222 connected in parallel.

[0075] 第二调制电路222是通过去除功率接收电路的整流电路单元输出滤波器C以及第一调制电路210中的负载电阻调制单元的电感器而得到的电路。 [0075] The second modulation circuit 222 is a circuit rectifying output of the filter circuit unit C by removing the power reception circuit and a modulation circuit 210 in the first inductor of the load resistance obtained by the modulation unit.

[0076] 因而,当第一开关器件221接通时,接收单元处的谐振电流的振幅缓慢地增加。 [0076] Accordingly, when the first switching device 221 is turned on, the amplitude of the resonant current receiving unit is slowly increased. 在这种情况下,当第一开关器件221的接通部分(例如,接通时间部分)较长时,在接收单元120中出现电流逐渐累力卩。 In this case, when the portion of the first switching device 221 is turned on (e.g., on-time portion) is long, the current is gradually accumulated force occurs in the receiving unit 120 Jie. 因而,接收单元120处的有效负载电阻降低,并且反射电阻增加。 Accordingly, the effective load resistance at the receiving unit 120 decreases and the reflected resistance increases.

[0077] 图7示出本发明的负载电阻调制单元的第三实施例的第三调制电路(SEPIC型调制电路)。 [0077] FIG. 7 shows a third modulating circuit (SEPIC type modulation circuit) of the load resistor of the third embodiment of the present invention modulating unit.

[0078] 如图7所示,第三调制电路230是代表接收脉动DC电流的SEPIC型变换电路的示例的电路,更具体地,第三调制电路230包括第一开关器件231、第二开关器件234、第一电容器232、第二电容器235、以及电感器233。 The example circuit [0078] 7, the modulation circuit 230 is representative of a third type SEPIC converter circuit receiving the DC current ripple, and more particularly, the third modulation circuit 230 comprises a first switching device 231, a second switching device 234, a first capacitor 232, second capacitor 235, and inductor 233.

[0079] 第一开关器件的漏极端子连接到第三节点N3,其栅极端子连接到控制单元,并且其源极端子连接到第四节点N4。 [0079] The drain terminal of the first switching device is connected to the third node N3, a gate terminal connected to the control unit, and a source terminal connected to the fourth node N4.

[0080] 第一电容器232的一端连接到第三节点N3,其另一端连接到第五节点N5。 End [0080] The first capacitor 232 is connected to the third node N3, and the other end connected to the fifth node N5. 电感器233的一端连接到第五节点N5,其另一端连接到第六节点N6。 End of the inductor 233 is connected to the fifth node N5, and the other end connected to the sixth node N6. 第二开关器件234是二极管, 其一端连接到第六节点N6,并且其另一端连接到第七节点N7。 A second switching device 234 is a diode having one end connected to the sixth node N6, and the other end is connected to the seventh node N7. 第二电容器235的一端连接到第七节点N7,并且其另一端连接到第八节点N8。 One end of the second capacitor 235 is connected to the seventh node N7, and the other end connected to the eighth node N8.

[0081] 在本示例中,当第一开关器件231接收控制信号CNT并被激活时,提供到第三节点N3和接收单元120的电流增加。 [0081] In the present example, when the first switching device 231 receives a control signal CNT and activated, it is supplied to the third node N3 and receiving unit 120 of the current increase. 在这种情况下,连接到第六节点N6的电感器具有电流逐渐累加的状态,并由此向第五节点N5提供电流L。 In this case, the sixth node N6 is connected to the inductor current having a gradually accumulated state, and thereby provide current to the fifth node N5 L.

[0082] 然后,当第一开关器件231关断时,提供到第五节点N5的与电流Ies+Is^f-致的电压增加为大于第二开关器件234的阈值电压。 [0082] Then, when the first switching device 231 is turned off, the voltage supplied to the current Ies + Is ^ f- actuation of the fifth node N5 to increase the threshold voltage is larger than the second switching device 234. 于是,第二开关器件234接通,因此,提供到第五节点N5的电流增加。 Thus, the second switching device 234 is turned on, therefore, the current supplied to the fifth node N5 is increased.

[0083] 因而,通过在负载电阻调制单元140处调节有效负载电阻,接收单元120处的负载电阻&的大小可增大或降低。 [0083] Accordingly, the increase or decrease in the magnitude of the load resistor modulation unit 140 adjusting the effective load resistance, load resistance & reception unit 120 at. 根据这种原理,能够降低或增大反射电阻。 According to this principle, the reflection can be reduced or increased resistance.

[0084] 图8示出本发明的负载电阻调制单元的第四实施例的第四调制电路(降压型调制电路)。 [0084] FIG. 8 shows a fourth modulation circuit (modulating circuit step-down) of the load resistor of the fourth embodiment of the present invention modulating unit.

[0085] 如图8所示,第四调制单元240是代表用于增加输入电阻的降压型转换电路的示例的电路图。 [0085] As shown in FIG 8, fourth modulation unit 240 is a circuit diagram representative of an example of a buck converter circuit to increase the input resistance.

[0086] 更具体地,第四调制单元包括第一开关器件241、第二开关器件242、电感器243、 以及电容器244。 [0086] More specifically, the fourth modulation unit includes a first switching device 241, second switching device 242, an inductor 243 and a capacitor 244.

[0087] 第一开关器件241的漏极端子连接到整流电路单元130,其栅极端子连接到控制单元170,并且其漏极端子连接到第三节点N3。 The drain terminal of the [0087] first switching device 241 is connected to the rectifying circuit unit 130, a gate terminal connected to a control unit 170, and its drain terminal connected to the third node N3. 第二开关器件242可以是二极管,其一端连接到第三节点N3,并且其另一端连接到第四节点N4。 A second switching device 242 may be a diode having one end connected to the third node N3, and the other end connected to the fourth node N4. 电感器243的一端连接到第三节点N3,并且其另一端连接到第五节点N5。 End of the inductor 243 is connected to the third node N3, and the other end connected to the fifth node N5. 电容器244的一端连接到第三节点N3,并且其另一端连接到第六节点N6,从而电容器与电感器并联连接。 End of the capacitor 244 is connected to the third node N3, and the other end connected to the sixth node N6, so that the capacitor is connected in parallel with the inductor.

[0088] 当第一开关器件241接收控制信号(脉冲信号)并接通时,有效负载电阻被固定。 [0088] When the first switching device 241 receives a control signal (pulse signal) and is turned on, the effective load resistance is fixed. 如果第一开关器件241关断,那么电流减小,有效负载电阻增大,并由此无线功率传送装置中具有较大的反射电阻。 If the first switching device 241 is turned off, the current is reduced, the effective load resistance is increased, and thus the wireless power transmission device having a large reflection resistance.

[0089] 高的反射电阻增大了效率及功率,并由此增大了传送到无线功率接收装置的功率以及功率传送效率。 [0089] The high reflection efficiency and an increase in resistance of the power, and thereby increasing the transmit power and the efficiency of power transfer to the wireless power receiving apparatus.

[0090] 图9示出本发明的负载电阻调制单元的第五实施例的第五调制电路(接收脉动DC 电压输入的回扫调制电路)。 [0090] FIG. 9 shows a fifth embodiment of the load resistor modulation unit according to the invention a fifth modulation circuit (voltage input receives the pulsating DC flyback modulation circuit).

[0091] 如图9所示,第五调制电路250是代表接收脉动DC电压输入的回扫调制电路的示例的电路图。 [0091] As shown in FIG. 9, the modulation circuit 250 is a circuit diagram of a fifth example of a modulation circuit receives the flyback voltage input representative of the pulsating DC.

[0092] 更具体地,第五调制电路250包括回扫变压器253、第一开关器件254、第二开关器件255、及电容器256,其中,在回扫变压器253中,第一电感器251与第二电感器252中的线圈按照相反的方向缠绕。 [0092] More specifically, the modulation circuit 250 comprises a fifth flyback transformer 253, a first switching device 254, second switching device 255, and a capacitor 256, which, in the flyback transformer 253, a first inductor 251 and the second two inductor coil 252 is wound in the opposite direction.

[0093] 供参考地,回扫变压器253以如下方式形成,S卩,第一电感器251中的线圈与第二电感器252中的线圈按相反方向缠绕,并且使用相应的反电动势来提供电流。 [0093] For reference, the flyback transformer 253 is formed in such a manner, S Jie, the first inductor coil 251 and the second inductor coil 252 wound in opposite directions, and using the corresponding back electromotive force to provide a current .

[0094] 第一电感器251的一端连接到第三节点N3,并且其另一端连接到第一开关器件254的源极端子。 [0094] One end of the first inductor 251 is connected to the third node N3, and the other end connected to a source terminal of a first switching device 254. 第一开关器件254的源极端子连接到第一电感器251的另一端,控制信号被提供到第一开关器件的栅极端子,并且第一开关器件的漏极端子连接到第四节点N4。 A first source terminal of the switching device 254 is connected to the other end of the first inductor 251, a first control signal is supplied to the gate terminal of the switching device, and a drain terminal of the first switching device is connected to the fourth node N4.

[0095] 第二电感器252的一端连接到二极管的一端,并且其另一端连接到电容器256的一端。 [0095] One end of the second inductor 252 is connected to one end of the diode, and the other end connected to one end of the capacitor 256. 电容器256与二极管并联连接。 A capacitor 256 connected parallel with a diode.

[0096] 当第一开关器件254的关断部分随着提供到第五调制电路250的控制信号(脉冲信号)的关断比例的增大而变长时,从第一电感器251提供到第二电感器252的电流降低, 并且接收单元120的谐振电压增加。 [0096] When the shut-off part 254 as a first switching device to provide a fifth control signal modulation circuit 250 (a pulse signal) off ratio is increased becomes longer, from the first to the second inductor 251 provides two inductor current is reduced 252, and the receiving unit 120 of the resonance voltage increases. 由此,有效负载电阻增大。 Accordingly, the effective load resistance is increased.

[0097] 由此,接收单元120引起无线功率传送装置中的反射电阻变高。 [0097] Accordingly, the receiving unit 120 causes the reflected resistance of the wireless power transmission device high. 高的反射电阻增加功率传送效率以及功率,并且由此传送到无线功率接收装置的功率以及功率传送效率增加。 A high reflection efficiency of power transfer resistance increases, and power, and to thereby increase the transmit power and the power transmission efficiency of the wireless power receiving apparatus.

[0098] 图10示出本发明的负载电阻调制单元的第六实施例的第六调制电路(降压-升压-级联型调制电路)。 [0098] FIG. 10 shows a sixth embodiment of the modulator circuit of the sixth embodiment of the load resistor of the present invention, the modulation means (buck - boost - Cascade modulation circuit).

[0099] 第六调制电路260是代表接收脉动DC电压输入的降压-升压-级联型电路的示例的电路图。 [0099] Sixth modulation circuit 260 is representative of the received pulsating DC voltage input buck - boost - Cascade exemplary circuit diagram.

[0100] 更具体地,第六调制电路260包括第一开关器件261、第二开关器件262、电感器263、第三开关器件264、第四开关器件265、以及电容器C。 [0100] More specifically, the sixth modulation circuit 260 comprises a first switching device 261, second switching device 262, an inductor 263, a third switching device 264 and fourth switching device 265, and a capacitor C.

[0101] 第一开关器件261的源极端子连接到整流电路单元130,控制信号被提供到第一开关器件的栅极端子,并且第一开关器件的漏极端子连接到第三节点N3。 [0101] source terminal of the first switching device 261 is connected to the rectifying circuit unit 130, a control signal is supplied to the gate terminal of the first switching device, and the drain terminal of the first switching device is connected to the third node N3.

[0102] 电感器263的一端连接到第三节点N3,并且其另一端连接到第五节点N5。 End [0102] of the inductor 263 is connected to the third node N3, and the other end connected to the fifth node N5. 第二开关器件262的一端连接到第三节点N3,并且其另一端连接到第四节点N4。 One end of the second switching device 262 is connected to the third node N3, and the other end connected to the fourth node N4. 第三开关器件的源极端子连接到第五节点N5,其栅极端子连接到控制单元170,并且其漏极端子连接到第六节点N6。 The source terminal of the third switching device is connected to the fifth node N5, a gate terminal connected to a control unit 170, and its drain terminal connected to the sixth node N6. 电容器267的一端连接到第七节点N7,并且其另一端连接到第八节点N8。 End of the capacitor 267 is connected to the seventh node N7, and the other end connected to the eighth node N8.

[0103] 在本示例中,第一及第三开关器件261及264同时接收控制信号CNT(相同的脉冲信号)以执行接通/关断操作。 [0103] In the present example, the first and third switching devices 261 and 264 simultaneously receives the control signal CNT (the same pulse signal) to perform ON / OFF operation.

[0104] 因而,当第一及第三开关器件261及264接通时,电感器上的电流逐渐累加。 [0104] Accordingly, when the first and third switching devices 261 and 264 is turned on, the inductor current is gradually accumulated. 当逐渐累加时间(例如,接通时间部分)短时,频繁地出现接收单元120的谐振电压逐渐累加。 When short, the receiving unit frequently occurs gradually accumulated time (e.g., on-time portion) 120 of the resonance voltage is gradually accumulated.

[0105] 由此,接收单元120处的有效负载电阻增大,并且传送装置中的反射电阻相应地增大。 [0105] Accordingly, the effective load resistance 120 at the receiving unit increases, and the reflection means is transferred resistance increases accordingly. 因此,能够增大从无线功率传送装置100输出的功率以及功率传送效率。 Accordingly, the power can be increased and the power transmission efficiency of the wireless power transmission apparatus 100 from the output.

[0106] 图11 (a)及图11 (b)是当本发明的接收单元包括串联谐振结构及并联谐振结构时等效地对接收装置执行串联或并联变换以便经由调制负载电阻来增加反射电阻的示例。 [0106] FIG. 11 (a) and FIG. 11 (b) when the receiving unit according to the present invention comprises a series resonator and the parallel resonator structure when the structure of the receiving apparatus performs equivalently in series or parallel to increase the reflectivity in order to transform the resistance load resistor via the modulator examples.

[0107] 参照图11 (a),功率接收装置包括由C2A与C2B构成的串联及并联谐振结构这二者。 [0107] Referring to FIG. 11 (a), the power reception device comprises both serial and parallel resonance structure represented by C2A and C2B configuration.

[0108] 如果<<I,则C2B的影响被忽略,并且电路变成串联谐振。 [0108] If << I, the impact C2B is ignored, and becomes a series resonant circuit. 在这种情况下, 当负载电阻调制单元控制电流以降低有效负载电阻时,能够增加加载Q值以及反射电阻。 In this case, the load resistance when the current modulation unit controls to reduce the effective load resistance, the Q value can be increased load resistance and a reflector.

[0109] 如果>>1,则执行到串联谐振结构的转换,并且负载电阻改变成倒数,使得执行缩放(例如,1/(»2^^尺))。 [0109] If >> 1, then performs the conversion of the series resonant structure, and the load resistance is changed to the reciprocal, that performs scaling (e.g., 1 / ( »^^ ft 2)). 由此,随着负载电阻&增大,所转换的负载电阻降低, 并且加载Q值增加。 Thus, as the load resistance & increases, the converted load resistance decreases, and the load Q value is increased. 因此,当负载电阻调制单元控制电流以增加有效负载电阻时,能够增加反射电阻。 Thus, when the resistance of the load modulation unit controls the current to increase the effective load resistance, the resistance can be increased reflection.

[0110] 参照图11(b),功率接收装置也包括由C2A及C2B所构成的串联及并联谐振结构这二者。 [0110] Referring to FIG. 11 (b), the power reception device also includes both serial and parallel resonance structure represented by C2A and C2B posed.

[0111] 如果>>I,则c2B的影响被忽略,并且电路变成串联谐振。 [0111] If >> I, the impact c2B is ignored, and becomes a series resonant circuit. 在这种情况下, 当负载电阻调制单元控制电流以增加有效负载电阻时,能够增加加载Q值及反射电阻。 In this case, the load resistance when the current modulation unit controls to increase the effective load resistance, the Q value can be increased load resistance and reflectance.

[0112] 如果iC〗/;心<<1,则接收单元转换成并联谐振结构,并且负载电阻改变成倒数, 从而执行缩放。 [0112] If 〖iC /; heart << 1, the receiving unit is converted into a parallel resonant structure, and the reciprocal of the load resistor is changed to thereby perform zooming. (例如,I))。 (E.g., I)).

[0113] 因而,随着负载电阻的降低,所转换的负载电阻增大,并且加载Q值增大。 [0113] Accordingly, with decreasing load resistance, load resistance increases converted and loaded Q value increases. 由此,当负载电阻调制单元控制电流以降低有效负载电阻时,能够增大反射电阻。 Accordingly, when the resistance of the load modulation unit controls current to reduce the effective load resistance, the resistance can be increased reflection.

[0114] 图12是图3中的无线功率接收装置的操作方法的流程图。 [0114] FIG. 12 is a flowchart of a method of operating a wireless power receiving apparatus 3 in FIG.

[0115] 如图12所示,无线功率接收装置的操作方法S10包括接收步骤S11、整流步骤S12、及负载电阻改变步骤S13。 [0115] As shown, the method of operating a wireless power receiving apparatus includes a receiving S10 step S11, the rectification step S12, and the load resistance changes step S13 12.

[0116] 接收步骤S11是接收单元从无线功率传送装置100接收功率的步骤。 [0116] Step S11 is a step of receiving unit 100 receives the wireless power receiving apparatus from the transmitting power.

[0117] 整流步骤S12是整流电路单元对通过使用所接收的功率产生的电流进行整流的步骤。 [0117] Step S12 is a step of rectifying circuit rectifying the current unit by using the received power generated by rectifying.

[0118] 负载电阻改变步骤S13是如下步骤:负载电阻调制单元140接收具有占空比的控制信号,根据控制信号CNT调节电流以改变有效负载电阻的大小,并且调节反射电阻的大小,以便提尚效率。 [0118] Step S13 is to change the load resistance of the following steps: a load resistor modulation unit 140 receives a control signal having a duty ratio adjusted according to the current control signal CNT to change the magnitude of the effective load resistance and adjust the size of the resistance reflected to provide still effectiveness.

[0119] 占空比可以是固定或可变的占空比,并且整流步骤S12可以包括生成脉动DC电流的步骤。 [0119] The duty cycle may be fixed or variable duty cycle, and the rectification step S12 may include the step of generating a pulsating DC current.

[0120] 图13是图3中的无线功率传送系统的操作方法的流程图。 [0120] FIG. 13 is a flowchart of a method of operating a wireless power transfer system in FIG.

[0121] 如图13所示,无线功率传送系统的操作方法S100包括传送步骤S110、接收步骤S120、整流步骤S130、以及负载电阻改变步骤S140。 [0121] As shown in FIG. 13, the operation method of a wireless power transfer system includes a transfer S100 of step S110, the receiving step S120, the rectification step S130, the load resistor changing step S140.

[0122] 传送步骤S11是无线功率传送装置100传送功率的步骤。 [0122] Step S11 is a step of transmitting the transmission power 100 of a wireless power transmission apparatus.

[0123] 接收步骤S120是无线功率接收装置200接收所传送的功率的步骤。 [0123] S120 is a step of receiving the wireless power receiving step receives the transmitted power device 200.

[0124] 整流步骤S130是无线功率接收装置200对通过使用所接收的功率生成的电流进行整流的步骤。 [0124] Step S130 is rectifying the wireless power receiver 200 pairs the received current using the power generated by the step of rectifying means.

[0125] 负载电阻改变步骤S140是如下步骤:无线功率接收装置200接收具有占空比的控制信号CNT,根据控制信号CNT调节电流以改变有效负载电阻的大小,并且相应地调节反射电阻的大小以提尚功率传递效率。 [0125] Step S140 is to change the load resistance the steps of: a wireless power receiving apparatus 200 receives a control signal CNT has a duty ratio adjusted according to the current control signal CNT to change the resistance of payload size, and adjusts the size of the reflecting resistance to mention still power transfer efficiency.

[0126] 图14(a)是本发明与现有技术中的传送功率相对于传送装置与接收装置之间的距离的曲线图,并且图14(b)是本发明与现有技术中的传送功率相对于传送装置与接收装置之间的距离的曲线图。 [0126] FIG. 14 (a) is a transmission power according to the present invention and the prior art versus the distance between the transmitting device and a receiving device, and FIG. 14 (b) are transmitted with the prior art power versus the distance between the transmitting and receiving devices.

[0127] 如图14(a)及图14(b)所示,可以看出,在现有技术中,距离越长,传送功率与系统的效率越低。 [0127] FIG. 14 (a) and FIG. 14 (b) as shown, it can be seen in the prior art, the longer the distance, the lower the efficiency and the power transmission system. 相反地,可以看出,经由负载电阻调制单元,本发明具有与距离无关且不变的传送功率以及效率。 Conversely, it can be seen via the load resistor modulation unit, the present invention is independent of the distance and having a constant transmission power and efficiency.

[0128] 图15(a)是本发明与现有技术中的当输出21. 6W时的效率相对于距离的曲线图, 并且图15(b)是本发明与现有技术中的当输出10. 9W时的效率相对于距离的曲线图。 [0128] FIG. 15 (a) that the present invention and the prior art as at 21. 6W output efficiency versus distance, and FIG. 15 (b) that the present invention and the prior art when the output 10 efficiency of 9W. versus distance.

[0129] 这样,本发明可以接收接收装置的作为反馈的输出电压以调节反射电阻的大小(值)。 [0129] Thus, the present invention may receive the output voltage feedback means to adjust the size of the received reflection of the resistance (value). 另外,即使当存在长的距离时,也能够提供不变的功率。 Further, even when there is a long distance, it is possible to provide constant power. 相反地,当存在长距离且功率变换器之前的输出功率降低到小于或等于负载电阻器实际需要的功率时,现有技术已不能提供功率。 Conversely, when a long distance is present before the power converter and the output power is reduced to less than or equal to the load power resistor actual needs, the prior art has been unable to provide power.

[0130] 然而,由于本发明能够增加反射电阻,因此即使在较长距离的情况下,当存在长距离且功率变换器之前的输出功率降低到小于或等于负载电阻器实际需要的功率时,也可以维持传送装置需要的输出功率。 [0130] However, since the present invention is capable of increasing the resistance of the reflection, so even in the case of long distance, and when there is a long distance before the reduction in output power of the power converter to a power equal to or less than the actual needs of the load resistor, and transfer means may maintain the required output power.

[0131] 虽然使用特定实施例及图说明了本发明,但本发明不限于此,并且在本发明的技术精神以及下面的权利要求书的等同范围内,本发明所属领域的技术人员可以做出修改及改变。 [0131] Although particular embodiments of the present invention and FIG been described, but the present invention is not limited thereto, and within the scope of the following claims and technical spirit of the present invention, the scope of the claims of the equivalents, those skilled in the art may be made to the present invention modifications and changes.

[0132] 附图标记说明 [0132] REFERENCE NUMERALS

[0133] 100 :无线功率传送装置 [0133] 100: wireless power transmission apparatus

[0134] 120:接收单元 [0134] 120: receiving unit

[0135] 130:整流电路单元 [0135] 130: rectifier circuit means

[0136] 140:负载电阻调制单元 [0136] 140: load resistance modulating unit

[0137] 200:无线功率接收装置 [0137] 200: wireless power receiving apparatus

[0138] 210:第一调制电路 [0138] 210: a first modulation circuit

[0139] 220:第二调制电路 [0139] 220: second modulation circuit

[0140] 230:第三调制电路 [0140] 230: third modulation circuit

[0141] 240:第四调制电路 [0141] 240: fourth modulation circuit

[0142] 250:第五调制电路 [0142] 250: fifth modulating circuit

[0143] 260:第六调制电路 [0143] 260: a sixth modulation circuit

[0144] 300 :无线功率传送系统 [0144] 300: wireless power transfer system

Claims (12)

1. 一种无线功率接收装置,其包括: 接收单元,其从功率传送装置接收功率; 整流电路单元,其对从所述接收单元输出的电流进行整流,并输出所整流的电流;以及负载电阻调制单元,其接收具有占空比的控制信号,根据所接收的控制信号调节从所述整流电路单元提供的所述电流以改变有效负载电阻的大小,并增加反射电阻的大小以提高效率。 1. A wireless power receiving apparatus, comprising: a receiving unit that receives power from the power transmitting device; a current rectifier circuit means for rectifying a current output from the receiving unit, and outputs the rectified; and load resistors modulation unit that receives the control signal having a duty ratio control signal adjusts the current received from the rectifier circuit unit is provided to change the magnitude of the effective load resistance, and increase the size of the resistance to increase reflection efficiency.
2. 根据权利要求1所述的无线功率接收装置,其中,所述占空比是固定的或可变的占空比。 The power of the wireless receiving apparatus of claim 1, wherein said duty cycle is fixed or variable duty cycle.
3. 根据权利要求1或2所述的无线功率接收装置,其中,所述接收单元包括串联连接的电感器和电容器。 3. The wireless power receiving apparatus according to claim 1 or claim 2, wherein said receiving means includes an inductor and a capacitor connected in series.
4. 根据权利要求3所述的无线功率接收装置,其中,所述负载电阻调制单元调节从所述整流电路单元提供的所述电流以降低所述有效负载电阻的大小。 4. The wireless power receiving apparatus according to claim 3, wherein said modulation means adjust the load resistor current from the rectifier circuit unit is provided to reduce the resistance of the payload size.
5. 根据权利要求4所述的无线功率接收装置,其中,所述负载电阻调制单元是升压型调制电路或升压-降压型调制电路。 According to claim 4, wherein the wireless power receiving apparatus, wherein said load resistor section is a modulation step-up type modulation circuit or a boost - buck modulation circuit.
6. 根据权利要求4所述的无线功率接收装置,其中,所述负载电阻调制单元是SEPIC型调制电路。 6. The wireless power according to claim 4, wherein the receiving apparatus, wherein said modulation means is a load resistor SEPIC type modulation circuit.
7. 根据权利要求1或2所述的无线功率接收装置,其中,所述接收单元包括并联连接的电感器和电容器。 The wireless power of claim 1 or claim 2, wherein the receiving apparatus, wherein said receiving means includes an inductor and a capacitor connected in parallel.
8. 根据权利要求7所述的无线功率接收装置,其中,所述负载电阻调制单元调节从所述整流电路单元提供的电流以增加所述有效负载电阻的大小。 8. The wireless power receiving apparatus according to claim 7, wherein said load resistor modulation unit adjusts a current from the rectifier circuit means is provided to increase the size of the effective load resistance.
9. 根据权利要求8所述的无线功率接收装置,其中,所述负载电阻调制单元是降压型调制电路或降压-升压型调制电路。 9. The wireless power receiving apparatus according to claim 8, wherein said modulation means is a resistive load modulation circuit or a step-down buck - boost modulation circuit.
10. 根据权利要求8所述的无线功率接收装置,其中,所述负载电阻调制单元是降压-升压-级联型调制电路。 10. The wireless power of the receiving apparatus according to claim 8, wherein said modulation unit is a load resistor buck - boost - cascaded modulation circuit.
11. 根据权利要求1或2所述的无线功率接收装置,其中,所述接收单元包括电感器和两个电容器,其中,所述两个电容器之中的每者以串联-并联结构或并联-串联结构连接到所述电感器。 11. The wireless power receiving device according to claim 1, wherein said receiving means comprises an inductor and two capacitors, wherein each capacitor were among the two series - parallel configuration or parallel - are connected in series to the inductor.
12. 根据权利要求11所述的无线功率接收装置,其中,所述负载电阻调制单元是用于调制所述有效负载电阻以增加所述无线功率接收装置的加载Q值的调制电路。 According to claim 11, wherein the wireless power receiving apparatus, wherein said load resistor is a modulation unit for modulating the payload modulation circuit load resistor to increase the Q value of the wireless power receiving apparatus.
CN201280078160.7A 2012-12-18 2012-12-18 Efficiency and the wireless power reception device of power transmission can be improved by modulating the pay(useful) load resistance of receiving terminal CN104937810B (en)

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