TWI819902B - Wireless power transfer device and system - Google Patents

Abstract

A wireless charging device includes a first coil, a first capacitor, a second capacitor and a first inductor. The first coil has a radius of curvature and an inductance value associated with the radius of curvature, and is used for converting an alternating current signal into a magnetic field. One end of the first capacitor is connected to one end of the first coil. One end of the second capacitor is connected to the other end of the first capacitor, and the other end of the second capacitor is connected to the other end of the first coil. One end of the first inductor is connected to the other end of the first capacitor and one end of the second capacitor, and the other end is configured to receive the AC signal. At least one of the capacitance value of the first capacitor and the capacitance value of the second capacitor is determined by the inductance of the first coil.

Description

Translated fromChinese

無線充電裝置及系統Wireless charging devices and systems

本發明係關於一種無線充電裝置及系統，特別是關於一種適用於移動載具的無線充電裝置及系統。The present invention relates to a wireless charging device and system, and in particular to a wireless charging device and system suitable for mobile vehicles.

一般來說，無線充電技術可分為靜態無線充電技術或動態無線充電(Dynamic Wireless Power Transfer，DWPT)技術。實施靜態無線充電時，需要將待充物以特定方向及距離靠近充電物，並等待一定時間；而對於動態無線充電而言，充電物可隨著待充物的移動調控內部的充電電路以實時進行充電工作。Generally speaking, wireless charging technology can be divided into static wireless charging technology or dynamic wireless charging (Dynamic Wireless Power Transfer, DWPT) technology. When implementing static wireless charging, you need to bring the object to be charged close to the charging object in a specific direction and distance and wait for a certain period of time; for dynamic wireless charging, the charging object can adjust the internal charging circuit in real time as the object to be charged moves. Carry out charging work.

動態無線充電目前仍具有諸多限制，舉例來說，充電線圈需要沿直線設置。然而考量到許多彎曲軌道上的實際需求(如一般道路)，直線架構的無線充電系統的各式參數將不符合彎道上的應用，造成其充電效率不佳或是較不穩定。Dynamic wireless charging still has many limitations. For example, the charging coil needs to be placed in a straight line. However, considering the actual needs on many curved tracks (such as ordinary roads), the various parameters of a linear wireless charging system will not meet the application on curves, resulting in poor charging efficiency or instability.

鑒於上述，本發明提供一種無線充電裝置及系統。In view of the above, the present invention provides a wireless charging device and system.

依據本發明一實施例的無線充電裝置，包含第一線圈、第一電容、第二電容以及第一電感。第一線圈具有一曲率半徑及關聯於該曲率半徑的電感值，用於將一交流電訊號轉換為磁場。第一電容的一端連接於第一線圈的一端。第二電容的一端連接於第一電容的另一端，且另一端連接於第一線圈的另一端。第一電感的一端連接於第一電容的另一端及第二電容的一端，且另一端用於接收所述交流電訊號。第一電容的電容值及第二電容的電容值中的至少一者由所述第一線圈的電感值決定。A wireless charging device according to an embodiment of the present invention includes a first coil, a first capacitor, a second capacitor and a first inductor. The first coil has a radius of curvature and an inductance value associated with the radius of curvature, and is used to convert an alternating current signal into a magnetic field. One end of the first capacitorConnected to one end of the first coil. One end of the second capacitor is connected to the other end of the first capacitor, and the other end is connected to the other end of the first coil. One end of the first inductor is connected to the other end of the first capacitor and one end of the second capacitor, and the other end is used to receive the alternating current signal. At least one of the capacitance value of the first capacitor and the capacitance value of the second capacitor is determined by the inductance value of the first coil.

依據本發明一實施例的動態無線充電系統，包含多個傳輸線圈、一接收線圈以及一補償電容。所述多個傳輸線圈的每一者具有一曲率半徑及關聯於所述曲率半徑的電感值，且各用於將一交流電訊號轉換為磁場。所述多個補償電路各包含第一電容、第二電容及第一電感，其中第一電容之一端連接於所述多個傳輸線圈中的一者的一端；第二電容的之一端連接於第一電容的另一端，且以另一端連接於所述傳輸線圈的另一端；第一電感之一端連接於第一電容的另一端及第二電容的一端，且另一端用於接收所述交流電訊號。接收線圈用於將所述多個傳輸線圈中的至少二者各自產生的磁場轉換為另一交流電訊號，且一端用於連接至一負載。第一電容的電容值及第二電容的電容值中的至少一者由所述傳輸線圈的電感值決定。A dynamic wireless charging system according to an embodiment of the present invention includes multiple transmission coils, a receiving coil and a compensation capacitor. Each of the plurality of transmission coils has a radius of curvature and an inductance value associated with the radius of curvature, and is each used to convert an alternating current signal into a magnetic field. Each of the plurality of compensation circuits includes a first capacitor, a second capacitor and a first inductor, wherein one end of the first capacitor is connected to one end of one of the plurality of transmission coils; one end of the second capacitor is connected to the The other end of a capacitor is connected to the other end of the transmission coil; one end of the first inductor is connected to the other end of the first capacitor and one end of the second capacitor, and the other end is used to receive the alternating current signal. . The receiving coil is used to convert the magnetic field generated by at least two of the plurality of transmitting coils into another alternating current signal, and one end is used to be connected to a load. At least one of the capacitance value of the first capacitor and the capacitance value of the second capacitor is determined by the inductance value of the transmission coil.

藉由上述結構，本案所揭示的無線充電裝置及系統可透過使用補償電路，確保系統中電壓與電流同相，使系統成為純電阻性，減少傳輸時的損耗，藉此增加傳輸效率。傳輸線圈可依據應用需求而具有一彎曲結構(伴隨著一曲率半徑)，所述補償電路中的電容的配置是依據傳輸線圈的電感值而定，而傳輸線圈的電感值隨著所述曲率半徑而變化。如此一來，可隨著傳輸線圈的曲率半徑調整補償電路中的電容配置，提供適用於彎道的無線充電裝置及系統，達成整體傳輸效率的優化。With the above structure, the wireless charging device and system disclosed in this case can ensure that the voltage and current in the system are in phase by using a compensation circuit, making the system purely resistive, reducing transmission losses, thereby increasing transmission efficiency. The transmission coil can have a curved structure (accompanied by a radius of curvature) according to application requirements. The configuration of the capacitor in the compensation circuit is based on the inductance value of the transmission coil, and the inductance value of the transmission coil changes with the radius of curvature. And changechange. In this way, the capacitor configuration in the compensation circuit can be adjusted according to the curvature radius of the transmission coil, providing a wireless charging device and system suitable for curves, thereby optimizing the overall transmission efficiency.

以上之關於本揭露內容之說明及以下之實施方式之說明係用以示範與解釋本發明之精神與原理，並且提供本發明之專利申請範圍更進一步之解釋。The above description of the present disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principles of the present invention, and to provide further explanation of the patent application scope of the present invention.

1,1’:無線充電裝置1,1’: Wireless charging device

10,10A,10B:第一線圈10,10A,10B: first coil

10_1,10_2,10_3,10_4,10_n:傳輸線圈10_1,10_2,10_3,10_4,10_n:Transmission coil

12:第一電容12: First capacitor

12_1,12_2,12_n:電容12_1,12_2,12_n: capacitor

14:第二電容14: Second capacitor

14_1,14_2,14_n:電容14_1,14_2,14_n: capacitor

15:處理器15: Processor

16:第一電感16: First inductor

16_1,16_2,16_n:電感16_1,16_2,16_n: inductor

18_1,18_2,18_n:開關元件18_1,18_2,18_n: switching elements

19_1,19_2,19_n:電流感測器19_1,19_2,19_n:Current sensor

20:接收線圈20:Receive coil

22:補償電容22: Compensation capacitor

5:無線充電系統5:Wireless charging system

AC:交流電源供應器AC: AC power supply

C1,C2,Cn:補償電路C1, C2, Cn: compensation circuit

d1,d2:間距d1,d2: spacing

Fe:鐵氧體層Fe:ferrite layer

N1,N2:端N1, N2: end

O:虛圓心O: center of virtual circle

R_L:負載R_L : load

r1,r2,r3:曲率半徑r1, r2, r3: radius of curvature

ra:線圈寬度ra: coil width

w:寬度w:width

θ1,θ2,θ3:角度θ1, θ2, θ3: angle

D1,D2,D3:實驗數據D1, D2, D3: experimental data

圖1係依據本發明一實施例所繪示的無線充電裝置的電路圖。FIG. 1 is a circuit diagram of a wireless charging device according to an embodiment of the present invention.

圖2A係依據本發明一實施例所繪示的無線充電裝置的傳輸線圈的一實施態樣的示意圖。FIG. 2A is a schematic diagram of an implementation of a transmission coil of a wireless charging device according to an embodiment of the present invention.

圖2B係依據本發明一實施例所繪示的無線充電裝置的傳輸線圈的另一實施態樣的示意圖。FIG. 2B is a schematic diagram of another implementation of the transmission coil of the wireless charging device according to an embodiment of the present invention.

圖3係依據本發明另一實施例所繪示的無線充電裝置的電路圖。FIG. 3 is a circuit diagram of a wireless charging device according to another embodiment of the present invention.

圖4係依據本發明一實施例所繪示的動態無線充電系統的電路圖。FIG. 4 is a circuit diagram of a dynamic wireless charging system according to an embodiment of the present invention.

圖5A係依據本發明一實施例所繪示的動態無線充電系統的多個傳輸線圈的排列示意圖。FIG. 5A is a schematic diagram of the arrangement of multiple transmission coils of a dynamic wireless charging system according to an embodiment of the present invention.

圖5B係依據本發明一實施例所繪示的動態無線充電系統的接收線圈的示意圖。FIG. 5B is a schematic diagram of a receiving coil of a dynamic wireless charging system according to an embodiment of the present invention.

圖6係依據本發明另一實施例所繪示的動態無線充電系統的功能方塊圖。FIG. 6 is a functional block diagram of a dynamic wireless charging system according to another embodiment of the present invention.

圖7係依據本發明另一實施例所繪示的動態無線充電系統在不同實施態樣下的傳輸效率圖表。FIG. 7 is a diagram illustrating the transmission efficiency of a dynamic wireless charging system under different implementation aspects according to another embodiment of the present invention.

以下在實施方式中詳細敘述本發明之詳細特徵以及優點，其內容足以使任何熟習相關技藝者了解本發明之技術內容並據以實施，且根據本說明書所揭露之內容、申請專利範圍及圖式，任何熟習相關技藝者可輕易地理解本發明相關之目的及優點。以下之實施例係進一步詳細說明本發明之觀點，但非以任何觀點限制本發明之範疇。The detailed features and advantages of the present invention are described in detail below in the implementation mode. The content is sufficient to enable anyone skilled in the relevant art to understand the technical content of the present invention and implement it according to the content disclosed in this specification, the patent scope and the drawings. , anyone familiar with the relevant art can easily understand the relevant objectives and advantages of the present invention. The following examples further illustrate the aspects of the present invention in detail, but do not limit the scope of the present invention in any way.

請參考圖1，圖1為依據本發明一實施例所繪示的無線充電裝置的電路圖。如圖1所示，無線充電裝置1包含第一線圈10、第一電容12、第二電容14及第一電感16。第一線圈10具有一電感值L_tp，且用於將一交流電源供應器AC提供的交流電訊號轉換為磁場。第一電容12之一端連接於第一線圈10的一端N1。第二電容14的一端連接於第一電容12的另一端，且另一端連接於第一線圈10的另一端N2。第一電感16的一端連接於第一電容12的另一端及第二電容14的一端，且另一端用於接收所述交流電訊號。第一電容12的電容值C_tp及第二電容14的電容值C_ts中的至少一者由所述第一線圈的電感值L_tp決定。Please refer to FIG. 1 , which is a circuit diagram of a wireless charging device according to an embodiment of the present invention. As shown in FIG. 1 , thewireless charging device 1 includes afirst coil 10 , afirst capacitor 12 , asecond capacitor 14 and afirst inductor 16 . Thefirst coil 10 has an inductance value L_tp and is used to convert an alternating current signal provided by an alternating current power supply AC into a magnetic field. One end of thefirst capacitor 12 is connected to one end N1 of thefirst coil 10 . One end of thesecond capacitor 14 is connected to the other end of thefirst capacitor 12 , and the other end is connected to the other end N2 of thefirst coil 10 . One end of thefirst inductor 16 is connected to the other end of thefirst capacitor 12 and one end of thesecond capacitor 14 , and the other end is used to receive the AC signal. At least one of the capacitance value C_tp of thefirst capacitor 12 and the capacitance value C_ts of thesecond capacitor 14 is determined by the inductance value L_tp of the first coil.

在本例中，交流電源供應器AC用於提供交流電訊號。在其他實施例中，交流電源供應器AC可由其他方式實現，例如一直流電源供應器搭配一逆變器(DC/AC converter)，本案不限於此。第一線圈10可為導線環繞多圈形成的線圈，且如具備本領域通常知識者能理解的，環形導線具有電感效應因而具有電感值。特別來說，第一線圈10的電感值L_tp可由以下因素決定：線圈面積(A)、環繞圈數(N)及環繞圈數密度(L/N)，即

，其中μ為磁導率。應用上，無線充電裝置1的傳輸功率可由交流電訊號的大小、頻率以及第一線圈10的電感值L_tp決定，於此不贅述。In this example, the AC power supply AC is used to provide AC power signals. In other embodiments, the AC power supply AC can be implemented in other ways, such as a DC power supply coupled with an inverter (DC/AC converter), but this case is not limited thereto. Thefirst coil 10 may be a coil formed by multiple turns of wire, and as a person with ordinary knowledge in the art can understand, the loop wire has an inductance effect and therefore has an inductance value. Specifically, the inductance value L_tp of thefirst coil 10 can be determined by the following factors: coil area (A), number of surrounding turns (N), and density of surrounding turns (L/N), that is

, where μ is the magnetic permeability. Practically speaking, the transmission power of thewireless charging device 1 can be determined by the size and frequency of the AC signal and the inductance value L_tp of thefirst coil 10 , which will not be described again here.

另一方面，無線充電裝置1的傳輸效率可根據第一電容12、第二電容14以及第一電感16組成的補償電路決定。具體來說，本例的補償電路的第一電容12的電容值C_tp及第二電容14的電容值C_ts可由第一線圈的電感值L_tp決定。請參考下列關係式1。On the other hand, the transmission efficiency of thewireless charging device 1 can be determined according to the compensation circuit composed of thefirst capacitor 12 , thesecond capacitor 14 and thefirst inductor 16 . Specifically, the capacitance value C_tp of thefirst capacitor 12 and the capacitance value C_ts of thesecond capacitor 14 of the compensation circuit in this example can be determined by the inductance value L_tp of the first coil. Please refer to the followingrelationship 1.

上述關係式中的ω為該交流電訊號之振盪角頻率。透過關係式1可以適當調整對應的第一電容12的電容值C_tp及第二電容14的電容值C_ts。此外，若將第一電感的電感值L_ts納入考量，可參考下列關係式2。ω in the above relationship is the oscillation angular frequency of the AC signal. The corresponding capacitance value C_tp of thefirst capacitor 12 and the capacitance value C_ts of thesecond capacitor 14 can be appropriately adjusted through therelational expression 1. In addition, if the inductance value L_ts of the first inductor is taken into consideration, the followingrelational expression 2 can be referred to.

當第一電容12的電容值C_tp、第二電容14的電容值C_ts及第一電感的電感值L_ts滿足上述關係式1及2時，無線充電裝置1可視為一諧振電路(Resonant Circuit)，也就是電流與電壓的相位一致，因而使阻抗(impedance)最低而具有較佳的傳輸效率。When the capacitance value C_tp of thefirst capacitor 12 , the capacitance value C_ts of thesecond capacitor 14 and the inductance value L_ts of the first inductor satisfy the above-mentionedrelational expressions 1 and 2, thewireless charging device 1 can be regarded as a resonant circuit (Resonant Circuit). ), that is, the phase of the current and voltage is consistent, thus minimizing impedance and having better transmission efficiency.

請結合圖1參照圖2A及圖2B，圖2A係依據本發明一實施例所繪示的無線充電裝置的傳輸線圈的一實施態樣的示意圖，圖2B係依據本發明一實施例所繪示的無線充電裝置的傳輸線圈的另一實施態樣的示意圖。如圖2A所示，第一線圈10A為一種Q型線圈，可具有一彎曲結構以及對應於彎曲結構的一曲率半徑r1或r2(以第一線圈10A兩邊的虛擬延伸線相交處為一虛圓心O)。如上所述的，第一線圈10A的電感值L_tp可由線圈面積、環繞圈數及環繞圈數密度決定，也就是說，第一線圈10A的電感值L_tp可關聯於曲率半徑r1及r2。第一線圈的另一實施態樣如圖2B所示，第一線圈10B為一種DD型線圈，可具有一彎曲結構以及對應於彎曲結構的一曲率半徑r1、r2或r3(以第一線圈10B兩邊的虛擬延伸線相交處為一虛圓心O)，且第一線圈10B的電感值L_tp也可關聯於曲率半徑r1、r2及r3，在此不贅述。需要注意的是，第一線圈10A與10B的彎曲程度可具有多種描述方式，本案不限於此。具體來說，除了上述的曲率半徑r1、r2及r3以外，也可將曲率半徑進行運算(如算術平均或幾何平均)，或是透過角度對彎曲程度進行定義。此外，上述的交流電訊號可由線圈的一端N1及另一端N2輸入至線圈以產生磁場，且由於交流電訊號本身隨時間變換電流方向，故兩端N1及N2並沒有輸入端與輸出端的差異。需要注意的是，DD型線圈(第一線圈10B)的上下兩半部的電流傳遞方向相反，此部分於後面詳述。Please refer to FIGS. 2A and 2B in conjunction with FIG. 1 . FIG. 2A is a schematic diagram of a transmission coil of a wireless charging device according to an embodiment of the present invention. FIG. 2B is a schematic diagram of a transmission coil according to an embodiment of the present invention. A schematic diagram of another embodiment of the transmission coil of the wireless charging device. As shown in FIG. 2A , thefirst coil 10A is a Q-shaped coil, which may have a curved structure and a curvature radius r1 or r2 corresponding to the curved structure (the intersection of the virtual extension lines on both sides of thefirst coil 10A is an imaginary circle center. O). As mentioned above, the inductance value L_tp of thefirst coil 10A can be determined by the coil area, the number of surrounding turns, and the density of the surrounding turns. That is to say, the inductance value L_tp of thefirst coil 10A can be related to the curvature radii r1 and r2. Another implementation of the first coil is shown in Figure 2B. Thefirst coil 10B is a DD-type coil, which can have a curved structure and a curvature radius r1, r2 or r3 corresponding to the curved structure (take thefirst coil 10B The intersection of the virtual extension lines on both sides is a virtual circle center O), and the inductance value L_tp of thefirst coil 10B can also be related to the curvature radii r1, r2 and r3, which will not be described again here. It should be noted that the bending degree of thefirst coils 10A and 10B can be described in various ways, and this case is not limited thereto. Specifically, in addition to the above-mentioned curvature radii r1, r2 and r3, the curvature radius can also be calculated (such as arithmetic mean or geometric mean), or the degree of curvature can be defined through angles. In addition, the above-mentioned alternating current signal can be input to the coil from one end N1 and the other end N2 of the coil to generate a magnetic field, and since the alternating current signal itself changes the current direction with time, there is no difference between the input end and the output end of the two ends N1 and N2. It should be noted that the current transmission directions of the upper and lower halves of the DD-type coil (first coil 10B) are opposite, and this part will be described in detail later.

除了圖2A及圖2B所示的Q型線圈及DD型線圈以外，本案不限制其他實施態樣中採用不同形狀的線圈。舉例來說，將上述的DD型線圈的兩半部錯位重疊以在中間形成另一環狀空間的線圈，也可能作為本案線圈的一種實施態樣，在此不予以限制。請參照圖3，圖3為依據本發明另一實施例所繪示的無線充電裝置的電路圖。如圖3所示，無線充電裝置1’的第一傳輸線圈10_1、第一電容12_1、第二電容14_1及第一電感16_1分別與圖1所示的第一線圈10、第一電容12、第二電容14及第一電感16相同，在此省略重複敘述。本例更包含第二傳輸線圈10_2、第三電容12_2、第四電容14_2及第二電感16_2，並聯於圖1所示的元件。類似地，第二傳輸線圈10_2具有一曲率半徑及關聯於該曲率半徑的一電感值L_tp，且用於將交流電訊號轉換為磁場。第三電容12_2之一端連接於第二傳輸線圈10_2的一端。第四電容14_2之一端連接於第三電容12_2的另一端。第二電感16_2之一端連接於第三電容12_2的另一端及第四電容14_2的一端，且第二電感16_2的另一端用於接收交流電訊號。第三電容12_2的電容值C_tp及第四電容14_2的電容值C_ts中的至少一者取決於第二傳輸線圈10_2的電感值L_tp，其中第一傳輸線圈10_1為一Q型線圈，第二傳輸線圈10_2為一DD型線圈。In addition to the Q-shaped coil and the DD-shaped coil shown in FIGS. 2A and 2B , this case does not limit the use of coils of different shapes in other implementations. For example, a coil in which the two halves of the above-mentioned DD-type coil are staggered and overlapped to form another annular space in the middle may also be used as an implementation mode of the coil of this invention, and is not limited here. Please refer to FIG. 3 , which is a circuit diagram of a wireless charging device according to another embodiment of the present invention. As shown in Figure 3, the first transmission coil 10_1, the first capacitor 12_1, the second capacitor 14_1 and the first inductor 16_1 of the wireless charging device 1' are respectively connected with thefirst coil 10, thefirst capacitor 12 and the first inductor 16_1 shown in Figure 1. The twocapacitors 14 and thefirst inductor 16 are the same, and repeated descriptions are omitted here. This example further includes a second transmission coil 10_2, a third capacitor 12_2, a fourth capacitor 14_2 and a second inductor 16_2, which are connected in parallel to the components shown in FIG. 1 . Similarly, the second transmission coil 10_2 has a radius of curvature and an inductance value L_tp associated with the radius of curvature, and is used to convert alternating current signals into magnetic fields. One end of the third capacitor 12_2 is connected to one end of the second transmission coil 10_2. One end of the fourth capacitor 14_2 is connected to the other end of the third capacitor 12_2. One end of the second inductor 16_2 is connected to the other end of the third capacitor 12_2 and one end of the fourth capacitor 14_2, and the other end of the second inductor 16_2 is used to receive an alternating current signal. At least one of the capacitance value C_tp of the third capacitor 12_2 and the capacitance value C_ts of the fourth capacitor 14_2 depends on the inductance value L_tp of the second transmission coil 10_2, where the first transmission coil 10_1 is a Q-shaped coil, and the first transmission coil 10_1 is a Q-shaped coil. The second transmission coil 10_2 is a DD type coil.

另外，本例的無線充電裝置1’更選擇性設有兩開關元件18_1及18_2，分別連接於第一電感16_1的另一端及第二電感16_2的另一端，且分別用於將交流電訊號導通至第一傳輸線圈10_1及第二傳輸線圈10_2，或使交流電訊號不被傳輸至第一傳輸線圈10_1及第二傳輸線圈10_2。本例的第一傳輸線圈10_1與第二傳輸線圈10_2在空間上彼此靠近排列，且在開關元件18_1及18_2皆導通的情形下，Q型線圈與DD型線圈各自的磁場對彼此產生的感應電流相較於交流電源供應器AC提供的交流電訊號可忽略不計。請結合參考圖2B，DD型線圈的上半部與下半部的繞線方向相反，使得DD型線圈的上半部與下半部產生的磁場方向相反，因此在Q型線圈上產生的感應電流可互相抵消(換言之，Q型線圈於DD型線圈上半部及下半部產生的感應電流同理可互相抵消)。In addition, the wireless charging device 1' of this example is further selectively provided with two switching elements 18_1 and 18_2, which are respectively connected to the other end of the first inductor 16_1 and the other end of the second inductor 16_2, and are respectively used to conduct the AC signal to The first transmission coil 10_1 and the second transmission coil 10_2 may prevent the AC signal from being transmitted to the first transmission coil 10_1 and the second transmission coil 10_2. In this example, the first transmission coil 10_1 and the second transmission coil 10_2 are spatially arranged close to each other, and when the switching elements 18_1 and 18_2 are both turned on, the magnetic fields of the Q-type coil and the DD-type coil generate induced currents for each other. Compared with the AC power supply, the AC signal provided by AC is negligible. Please refer to Figure 2B. The winding directions of the upper half and the lower half of the DD-type coil are opposite, so that the magnetic fields generated by the upper and lower half of the DD-type coil are in opposite directions. Therefore, the induction generated on the Q-type coil The currents can cancel each other out (in other words, the induced currents generated by the Q-type coil in the upper and lower parts of the DD-type coil can cancel each other out in the same way).

在本例中，開關元件18_1及18_2的控制可依據待充電裝置與傳輸線圈10_1及10_2的相對位置而定。舉例來說，當待充電裝置靠近傳輸線圈10_1且遠離傳輸線圈10_2時，開關元件18_1可被導通且開關元件18_2可被關斷；當待充電裝置靠近傳輸線圈10_2且遠離傳輸線圈10_1時，開關元件18_2可被導通且開關元件18_1可被關斷；當待充電裝置靠近傳輸線圈10_1及10_2時，開關元件18_1及18_2可皆被導通；當待充電裝置遠離傳輸線圈10_1及10_2時，開關元件18_1及18_2可皆被關斷。在上述情形中，當開關元件18_1及18_2皆被導通時，相鄰設置的第一傳輸線圈(Q型線圈)10_1與第二傳輸線圈(DD型線圈)10_2也可不彼此影響而保持傳輸效率。具體來說，待充電裝置上可設有定位元件，定位元件可訊號連接至無線充電裝置1’的一控制器，且開關元件可連接至該控制器並受其控制。In this example, the control of the switching elements 18_1 and 18_2 may be based on the relative positions of the device to be charged and the transmission coils 10_1 and 10_2. For example, when the device to be charged is close to the transmission coil 10_1 and far away from the transmission coil 10_2, the switching element 18_1 can be turned on and the switching element 18_2 can be turned off; when the device to be charged is close to the transmission coil 10_2 and far away from the transmission coil 10_1, the switch The element 18_2 can be turned on and the switching element 18_1 can be turned off; when the device to be charged is close to the transmission coils 10_1 and 10_2, the switching elements 18_1 and 18_2 can both be turned on; when the device to be charged is far away from the transmission coils 10_1 and 10_2, the switching element 18_1 and 18_2 can both be turned off. In the above situation, when the switching elements 18_1 and 18_2 are both turned on, the adjacently arranged first transmission coil (Q-type coil) 10_1 and the second transmission coil (DD-type coil) 10_2 can maintain transmission efficiency without affecting each other. Specifically, the device to be charged can be provided with a positioning element, the positioning element can be signal-connected to a controller of the wireless charging device 1', and the switching element can be connected to and controlled by the controller.

請參照圖4，圖4係依據本發明一實施例所繪示的動態無線充電系統的電路圖。如圖4所示，動態無線充電系統5包含多個傳輸線圈(10_1、10_2至10_n)、多個補償電路、一接收線圈20以及一補償電容22。每個傳輸線圈具有一曲率半徑及關聯於該曲率半徑的一電感值，且用於將一交流電訊號轉換為磁場。補償電路包含第一電容(12_1、12_2至12_n)、第二電容(14_1、14_2至14_n)及第一電感(16_1、16_2至16_n)。第一電容之一端連接於第一線圈的一端。第二電容的一端連接於第一電容的另一端，且另一端連接於第一線圈的另一端。第一電感的一端連接於第一電容的另一端及第二電容的一端，且另一端用於接收所述交流電訊號。第一電容的電容值及第二電容的電容值中的至少一者由所述第一線圈的電感值決定。接收線圈20用於將傳輸線圈中的至少二者各自產生的磁場轉換為另一交流電訊號，且一端用於連接於一負載R_L。補償電容22之一端連接於接收線圈20且另一端用於連接於負載R_L。以下為了避免重複敘述，於本例將帶過對應於圖1至圖3且與傳輸線圈相關的細節。Please refer to FIG. 4 , which is a circuit diagram of a dynamic wireless charging system according to an embodiment of the present invention. As shown in FIG. 4 , the dynamicwireless charging system 5 includes multiple transmission coils (10_1, 10_2 to 10_n), multiple compensation circuits, a receivingcoil 20 and acompensation capacitor 22. Each transmission coil has a radius of curvature and an inductance value associated with the radius of curvature, and is used to convert an alternating current signal into a magnetic field. The compensation circuit includes first capacitors (12_1, 12_2 to 12_n), second capacitors (14_1, 14_2 to 14_n) and first inductors (16_1, 16_2 to 16_n). One end of the first capacitor is connected to one end of the first coil. One end of the second capacitor is connected to the other end of the first capacitor, and the other end is connected to the other end of the first coil. One end of the first inductor is connected to the other end of the first capacitor and one end of the second capacitor, and the other end is used to receive the alternating current signal. At least one of the capacitance value of the first capacitor and the capacitance value of the second capacitor is determined by the inductance value of the first coil. The receivingcoil 20 is used to convert the magnetic field generated by at least two of the transmitting coils into another alternating current signal, and one end is used to be connected to a load_RL . One end of thecompensation capacitor 22 is connected to the receivingcoil 20 and the other end is used to connect to the load_RL . In order to avoid repeated description, in this example, details corresponding to FIGS. 1 to 3 and related to the transmission coil will be discussed below.

進一步，本例的每個第一電容的電容值C_tp及第二電容的電容值C_ts可由傳輸線圈的電感值L_tp決定，請參考關係式1。而第一電感的電感值L_ts可由第二電容的電容值C_ts決定，請參考關係式2。另外，接收線圈20的電感值L_r以及補償電容22的電容值C_r可依照下列關係式3進行設計。Furthermore, in this example, the capacitance value C_tp of each first capacitor and the capacitance value C_ts of the second capacitor can be determined by the inductance value L_tp of the transmission coil. Please refer to therelational expression 1. The inductance value L_ts of the first inductor can be determined by the capacitance value C_ts of the second capacitor. Please refer toRelationship Equation 2. In addition, the inductance value L_r of the receivingcoil 20 and the capacitance value C_r of thecompensation capacitor 22 can be designed according to the followingrelational expression 3.

上述關係式中的ω為該交流電訊號之振盪角頻率。當第一電容的電容值C_tp、第二電容14的電容值C_ts及第一電感的電感值L_ts滿足上述關係式時，系統的無線充電裝置可視為一諧振電路(Resonant Circuit)，也就是電流與電壓的相位一致，因而使阻抗(impedance)最低而具有最佳的傳輸效率。另一方面當接收線圈20的電感值L_r以及補償電容22的電容值C_r滿足關係式3時，接收線圈20與補償電容22亦達成諧振條件，具有較高的接收效率。透過上述的無線充電系統5，交流電源供應器AC可並聯至所述多個傳輸線圈，並透過磁場變化將能量傳輸給接收線圈20。需要注意的是，在接收線圈20接受磁場變化後，會產生相應的感應交流電並透過補償電容22後施加於一負載R_L；而在其他實施態樣中，感應交流電可透過一整流器(Rectifier)被轉換為一直流電再施加於負載R_L；此外也可以額外並聯設置一個濾波電容，以減少閃頻訊號對負載R_L的影響。ω in the above relationship is the oscillation angular frequency of the AC signal. When the capacitance value C_tp of the first capacitor, the capacitance value C_ts of thesecond capacitor 14 and the inductance value L_ts of the first inductor satisfy the above relationship, the wireless charging device of the system can be regarded as a resonant circuit (Resonant Circuit), also That is, the phase of the current and voltage is consistent, so that the impedance (impedance) is the lowest and has the best transmission efficiency. On the other hand, when the inductance value L_r of the receivingcoil 20 and the capacitance value C_r of thecompensation capacitor 22 satisfyrelational expression 3, the receivingcoil 20 and thecompensation capacitor 22 also reach resonance conditions, resulting in higher receiving efficiency. Through the above-mentionedwireless charging system 5, the AC power supply AC can be connected in parallel to the multiple transmission coils and transmit energy to the receivingcoil 20 through changes in the magnetic field. It should be noted that after the receivingcoil 20 receives changes in the magnetic field, a corresponding induced alternating current will be generated and applied to a load_RL through thecompensation capacitor 22; in other implementations, the induced alternating current may pass through a rectifier (Rectifier) It is converted into a DC current and then applied to the load R_L ; in addition, an additional filter capacitor can be set in parallel to reduce the impact of the flash signal on the load R_L.

請結合圖4參考圖5A及圖5B，圖5A係依據本發明一實施例所繪示的動態無線充電系統的多個傳輸線圈的排列示意圖，圖5B係依據本發明一實施例所繪示的動態無線充電系統的接收線圈的示意圖。如圖5A所示，傳輸線圈10_1及10_3為Q型線圈，傳輸線圈10_2及10_4為DD型線圈，且彼此為交錯排列。本例的傳輸線圈設置在鐵氧體層Fe上，以避免磁場發散造成能量損耗。在本例中，每個傳輸線圈相對於圓心佔有的旋轉角度θ1為18°，傳輸線圈的內緣曲率半徑r1(相對於虛圓心O)為160毫米(mm)，外緣的曲率半徑r2為263.75毫米，線圈寬度ra為103.75毫米，線圈線寬w為13.8毫米，鐵氧體邊界的寬度d1為10毫米。Please refer to FIGS. 5A and 5B in conjunction with FIG. 4 . FIG. 5A is a schematic diagram of the arrangement of multiple transmission coils of a dynamic wireless charging system according to an embodiment of the present invention. FIG. 5B is a schematic diagram of a plurality of transmission coils according to an embodiment of the present invention. Schematic diagram of the receiving coil of a dynamic wireless charging system. As shown in FIG. 5A , the transmission coils 10_1 and 10_3 are Q-shaped coils, and the transmission coils 10_2 and 10_4 are DD-shaped coils, and are arranged in a staggered manner. The transmission coil in this example is set on the ferrite layer Fe to avoid energy loss caused by magnetic field divergence. In this example, the rotation angle θ1 occupied by each transmission coil relative to the center of the circle is 18°, the radius of curvature r1 of the inner edge of the transmission coil (relative to the virtual center O) is 160 millimeters (mm), and the radius of curvature r2 of the outer edge is 263.75 mm, the coil width ra is 103.75 mm, the coil line width w is 13.8 mm, and the width of the ferrite boundary d1 is 10 mm.

如圖5B所示，接收線圈20為一DDQ型串聯線圈，即包含一Q型線圈串聯一DD型線圈的結構。在本例中，接收線圈20的Q型線圈部分的張角θ2為41.5°，DD型線圈部分的張角為38.5°，換言之，接收線圈20可在旋轉角度θ1的方向上涵蓋一個Q型線圈及一個DD型線圈(38.5°>2×18°)；然而在其他實施態樣中，接收線圈20的張角可被設為傳輸線圈的旋轉角度θ1的三倍如54°，使得接收線圈無論在何種情形下都能確保涵蓋至少一個Q型傳輸線圈及一個DD型傳輸線圈。本例的接收線圈20同樣設置在鐵氧體層(未標號)上以避免磁場發散，且鐵氧體邊界的寬度d2為10毫米。此外，接收線圈20的線圈寬度(圖未示)可大於或等於傳輸線圈的線圈寬度ra，使得接收線圈20能充分接收來自傳輸線圈產生的磁場。As shown in FIG. 5B , the receivingcoil 20 is a DDQ-type series coil, that is, a structure including a Q-type coil connected in series with a DD-type coil. In this example, the opening angle θ2 of the Q-type coil part of the receivingcoil 20 is 41.5°, and the opening angle of the DD-type coil part is 38.5°. In other words, the receivingcoil 20 can cover a Q-type coil and a Q-type coil in the direction of the rotation angle θ1 DD type coil (38.5°>2×18°); however, in other implementations, the opening angle of the receivingcoil 20 can be set to three times the rotation angle θ1 of the transmitting coil, such as 54°, so that the receiving coil can be In all cases, it is guaranteed to cover at least one Q-type transmission coil and one DD-type transmission coil. The receivingcoil 20 in this example is also arranged on the ferrite layer (not labeled) to avoid magnetic field divergence, and the width d2 of the ferrite boundary is 10 mm. In addition, the coil width (not shown) of the receivingcoil 20 may be greater than or equal toThe coil width ra of the transmission coil enables the receivingcoil 20 to fully receive the magnetic field generated from the transmission coil.

請結合圖4及圖5參考圖6，圖6為依據本發明另一實施例所繪示的動態無線充電系統的功能方塊圖。無線充電系統5可更包含多個開關元件(18_1、18_2至18_n)，所述多個開關元件中的每一者連接於多個補償電路(C1、C2至Cn)中的一對應者的第一電感(16_1、16_2至16_n)的另一端，且用於使所述交流電訊號導通至傳輸線圈(10_1、10_2至10_n)，或使所述交流電訊號不被導通至傳輸線圈中的所述對應者。為了便於理解，圖4至圖6的傳輸線圈以相同符號標記，例如圖4、圖5A及圖6的傳輸線圈10_1可互相對應，其餘元件以此類推。在一種實施態樣中，開關元件可根據接收線圈20與多個傳輸線圈(10_1、10_2至10_n)的相對位置被控制。舉例來說，當系統偵測到接收線圈接近傳輸線圈10_1時，可控制對應的開關元件18_1使交流電訊號導通至傳輸線圈10_1。在另一實施態樣中，無線充電系統5更可包含多個電流感測器(19_1、19_2至19_n)及一處理器。如圖6所示，所述多個電流感測器分別連接於補償電路(C1、C2至Cn)，所述多個電流感測器中的每一者用於感測補償電路(C1、C2至Cn)中的一對應者的一電流。處理器15連接於電流感測器(19_1、19_2至19_n)及開關元件(18_1、18_2至18_n)，用於在判斷補償電路中的第一補償電路的電流的變化量大於一預設值且補償電路中的至少一第二補償電路的電流大於零時，控制開關元件中與第一補償電路連接的一第一開關元件為一關斷狀態，並控制該些開關元件中的一第二開關元件為一導通狀態，其中傳輸線圈中對應於第一開關元件的一第一傳輸線圈、對應於所述至少一第二補償電路的至少一第二傳輸線圈以及對應於第二開關元件的一第三傳輸線圈依序相鄰排列。Please refer to FIG. 6 in conjunction with FIG. 4 and FIG. 5 . FIG. 6 is a functional block diagram of a dynamic wireless charging system according to another embodiment of the present invention. Thewireless charging system 5 may further include a plurality of switching elements (18_1, 18_2 to 18_n), each of the plurality of switching elements being connected to a corresponding one of the plurality of compensation circuits (C1, C2 to Cn). The other end of an inductor (16_1, 16_2 to 16_n), and is used to conduct the AC signal to the transmission coil (10_1, 10_2 to 10_n), or to prevent the AC signal from being conducted to the corresponding part of the transmission coil. By. For ease of understanding, the transmission coils in Figures 4 to 6 are marked with the same symbols. For example, the transmission coils 10_1 in Figures 4, 5A and 6 can correspond to each other, and the rest of the components can be deduced by analogy. In one implementation, the switching element can be controlled according to the relative positions of the receivingcoil 20 and the plurality of transmitting coils (10_1, 10_2 to 10_n). For example, when the system detects that the receiving coil is close to the transmitting coil 10_1, the corresponding switching element 18_1 can be controlled to conduct the AC signal to the transmitting coil 10_1. In another implementation, thewireless charging system 5 may further include a plurality of current sensors (19_1, 19_2 to 19_n) and a processor. As shown in FIG. 6 , the plurality of current sensors are respectively connected to the compensation circuits (C1, C2 to Cn), and each of the plurality of current sensors is used to sense the compensation circuit (C1, C2 A current to a counterpart in Cn). Theprocessor 15 is connected to the current sensors (19_1, 19_2 to 19_n) and the switching elements (18_1, 18_2 to 18_n), and is used to determine that the change in the current of the first compensation circuit in the compensation circuit is greater than a preset value and When the current of at least one second compensation circuit in the compensation circuit is greater than zero, a first switching element among the switching elements connected to the first compensation circuit is controlled to be in an off state, and a second switch among the switching elements is controlled. The element is in a conductive state, wherein the transmission coil corresponds to the first switchA first transmission coil of the element, at least a second transmission coil corresponding to the at least one second compensation circuit, and a third transmission coil corresponding to the second switching element are arranged adjacently in sequence.

具體來說，圖5A中所示的傳輸線圈10_1為第一傳輸線圈10_1，傳輸線圈10_2及10_3為兩第二傳輸線圈10_2及10_3，傳輸線圈10_4為第三傳輸線圈10_4。當處理器15根據第一電流感測器19_1的量測判斷對應於第一傳輸線圈10_1的第一補償電路C1的電流的變化大於一預設值時，表示接收線圈20即將離開第一傳輸線圈10_1的感應範圍並往下一個傳輸線圈(即第三傳輸線圈10_4)的感應範圍靠近。處理器15便可控制第三開關元件為導通狀態並控制第一開關元件19_1為關斷狀態。需要注意的是，於上述過程中，對應於兩第二傳輸線圈10_2及10_3的第二開關元件被保持在導通狀態。Specifically, the transmission coil 10_1 shown in FIG. 5A is the first transmission coil 10_1, the transmission coils 10_2 and 10_3 are the two second transmission coils 10_2 and 10_3, and the transmission coil 10_4 is the third transmission coil 10_4. When theprocessor 15 determines based on the measurement of the first current sensor 19_1 that the change in the current of the first compensation circuit C1 corresponding to the first transmission coil 10_1 is greater than a preset value, it indicates that the receivingcoil 20 is about to leave the first transmission coil. The sensing range of 10_1 is close to the sensing range of the next transmission coil (ie, the third transmission coil 10_4). Theprocessor 15 can control the third switching element to be in a conductive state and control the first switching element 19_1 to be in an off state. It should be noted that during the above process, the second switching elements corresponding to the two second transmission coils 10_2 and 10_3 are maintained in the on state.

另外，第二傳輸線圈的數量不限於兩個而可以是一或多個，具體視接收線圈與傳輸線圈之間的感應範圍而定，例如第二傳輸線圈的數量若為兩個則對應於一次開啟三個傳輸線圈的方案，或數量若為四個則對應於一次開啟五個傳輸線圈的方案等，本案不限於此。上述的處理器15可以中央處理器(CPU)、圖形處理器(GPU)、可程式邏輯控制器(PLC)、微控制器(MCU)等實現，在此不予以限制。透過上述方案，無線傳輸系統可採用分段致能的方式，每次控制接近接收線圈的數個傳輸線圈導通，進而減少傳輸功率的損耗。需要注意的是，上述多個開關元件的初始狀態可皆為關斷狀態，處理器可存有各傳輸線圈的設置位置(如地理位置)並通訊連接於設有接收線圈的裝置以取得裝置的所在位置，藉此推得接收線圈所對應的多個傳輸線圈並使傳輸線圈所連接的開關元件為導通狀態。In addition, the number of the second transmission coil is not limited to two but may be one or more, depending on the induction range between the receiving coil and the transmission coil. For example, if the number of the second transmission coil is two, it corresponds to one The scheme of turning on three transmission coils, or if the number is four, corresponds to the scheme of turning on five transmission coils at one time, etc. This case is not limited to this. The above-mentionedprocessor 15 can be implemented by a central processing unit (CPU), a graphics processing unit (GPU), a programmable logic controller (PLC), a microcontroller (MCU), etc., and is not limited here. Through the above solution, the wireless transmission system can adopt a segmented enablement method to control the conduction of several transmission coils close to the receiving coil at a time, thereby reducing the loss of transmission power. It should be noted that the initial states of the above-mentioned multiple switching elements can all be in the off state. The processor can store the location of each transmission coil (such as the geographical location) and communicate with the device equipped with the receiving coil to obtain the device's location. locationSet, thereby pushing multiple transmission coils corresponding to the receiving coils and causing the switching elements connected to the transmission coils to be in a conductive state.

在能量轉換效率上，本案透過實驗找出了優化的參數條件，即無論接收線圈的移動速度為何，在適當的實驗架構下能量轉換效率可達約70%。請結合圖4至圖6參照圖7，圖7係依據本發明另一實施例所繪示的動態無線充電系統在不同實施態樣下的傳輸效率圖表。在圖5A所示的實驗架構及負載最佳化的條件下，本圖表分別記錄一次開啟相鄰三個線圈(實驗數據D1)、一次開啟相鄰五個線圈(實驗數據D2)及一次開啟全部線圈(實驗數據D3)，也就是不執行分段致能的能量傳輸效率，其中橫軸座標為馬達轉速，可代表接收線圈在圖5A所示的環形軌道上的移動速度。如圖5A所示，執行分段致能可大幅提升能量傳輸效率，其中一次開啟三個傳輸線圈效果尤佳。此外，實驗中採用的負載為優化後的最佳負載，具體來說，最佳負載R_L可以關係式4表示。In terms of energy conversion efficiency, this project found optimized parameter conditions through experiments, that is, no matter what the moving speed of the receiving coil is, the energy conversion efficiency can reach about 70% under an appropriate experimental structure. Please refer to FIG. 7 in conjunction with FIGS. 4 to 6 . FIG. 7 is a transmission efficiency chart of a dynamic wireless charging system in different implementations according to another embodiment of the present invention. Under the conditions of the experimental structure and load optimization shown in Figure 5A, this chart records that three adjacent coils are turned on at one time (experimental data D1), five adjacent coils are turned on at one time (experimental data D2), and all are turned on at one time. Coil (experimental data D3), that is, the energy transmission efficiency without performing segmented activation, in which the horizontal axis coordinate is the motor speed, which can represent the moving speed of the receiving coil on the circular track shown in Figure 5A. As shown in Figure 5A, performing segmented enablement can greatly improve energy transmission efficiency, in which turning on three transmission coils at one time is particularly effective. In addition, the load used in the experiment is the optimal load after optimization. Specifically, the optimal load R_L can be expressed byrelationship equation 4.

上述關係式4中的R_tp為傳輸線圈10_1的寄生電阻值，R_ts為第一電感16_1的寄生電阻值，R_r為接收線圈20的寄生電阻值，M為傳輸線圈與接收線圈20之間的互感值。需要注意的是，不同的傳輸線圈及補償電路所對應的最佳負載也不同。以依實際應用為例，無線充電系統的傳輸線圈被設置於道路表面下方，而接收線圈設置於車子底盤上方，使得當車子在道路上行駛時，傳輸線圈可將能量傳輸至接收線圈。進一步，接收線圈可連接至一固定負載，傳輸線圈及補償電路可適當搭配以滿足該固定負載恰為最佳負載之情形。另外在道路蜿蜒處，傳輸線圈可根據不同的道路曲率半徑進行調整，且隨著傳輸線圈的電感值及寄生電阻值的變化，可調整與該傳輸線圈連接的補償電路的電感值及電容值，以保持在車子上與接收線圈連接的該固定負載為最佳負載。如此一來，無論車子的速度為何，道路的彎曲程度如何改變，無線充電系統可(透過上述分段致能控制)保持能量傳輸效率在一定水準之上。R_tp in the aboverelational expression 4 is the parasitic resistance value of the transmission coil 10_1, R_ts is the parasitic resistance value of the first inductor 16_1, R_r is the parasitic resistance value of the receivingcoil 20, and M is between the transmission coil and the receivingcoil 20 mutual inductance value. It should be noted that the optimal loads corresponding to different transmission coils and compensation circuits are also different. Taking a practical application as an example, the transmission coil of the wireless charging system is placed below the road surface, and the receiving coil is placed above the car chassis, so that when the car is driving on the road, the transmission coil can transmit energy to the receiving coil. Furthermore, the receiving coil can be connected to a fixed load, and the transmitting coil and the compensation circuit can be appropriately matched to satisfy the situation that the fixed load is the optimal load. In addition, where the road is winding, the transmission coil can be adjusted according to different road curvature radii, and as the inductance value and parasitic resistance value of the transmission coil change, the inductance value and capacitance value of the compensation circuit connected to the transmission coil can be adjusted. , the fixed load connected to the receiving coil on the car is the optimal load. In this way, no matter what the speed of the car is or how the curvature of the road changes, the wireless charging system can (through the above-mentioned segmented enablement control) maintain the energy transmission efficiency above a certain level.

藉由上述結構，本案所揭示的動態無線充電系統及無線充電裝置可透過使用補償電路，確保系統中電壓與電流同相，使系統成為純電阻性，減少傳輸時的損耗，藉此增加傳輸效率。傳輸線圈可依據應用需求而具有一彎曲結構(伴隨著一曲率半徑)，所述補償電路中的電容的配置是依據傳輸線圈的電感值而定，而傳輸線圈的電感值隨著所述曲率半徑而變化。如此一來，可隨著傳輸線圈的曲率半徑調整補償電路中的電容配置，達成整體傳輸效率的優化。另外，透過Q型線圈與DD型線圈的交錯排列可減少傳輸線圈緊鄰設置時最彼此的影像；無線充電系統更可透過偵測接收線圈的位置對傳輸線圈執行分段致能控制優化整體能量傳輸效率。With the above structure, the dynamic wireless charging system and wireless charging device disclosed in this case can use a compensation circuit to ensure that the voltage and current in the system are in phase, making the system purely resistive, reducing transmission losses, thereby increasing transmission efficiency. The transmission coil can have a curved structure (accompanied by a radius of curvature) according to application requirements. The configuration of the capacitor in the compensation circuit is based on the inductance value of the transmission coil, and the inductance value of the transmission coil changes with the radius of curvature. And change. In this way, the capacitor configuration in the compensation circuit can be adjusted according to the curvature radius of the transmission coil, thereby optimizing the overall transmission efficiency. In addition, the staggered arrangement of Q-type coils and DD-type coils can reduce mutual interference when the transmission coils are placed close to each other; the wireless charging system can also perform segmented enablement control on the transmission coils by detecting the position of the receiving coil to optimize the overall energy transmission. efficiency.

雖然本發明以前述之實施例揭露如上，然其並非用以限定本發明。在不脫離本發明之精神和範圍內，所為之更動與潤飾，均屬本發明之專利保護範圍。關於本發明所界定之保護範圍請參考所附之申請專利範圍。Although the present invention is disclosed in the foregoing embodiments, they are not intended to limit the present invention. All changes and modifications made without departing from the spirit and scope of the present invention shall fall within the scope of patent protection of the present invention. Regarding the protection scope defined by the present invention, please refer to the attached patent application scope.

1:無線充電裝置1:Wireless charging device

10:第一線圈10: First coil

12:第一電容12: First capacitor

14:第二電容14: Second capacitor

16:第一電感16: First inductor

AC:交流電源供應器AC: AC power supply

N1,N2:端N1, N2: end

Claims (10)

Translated fromChinese

一種無線充電裝置，包含： 一第一線圈，具有一曲率半徑及關聯於該曲率半徑的一電感值，且用於將一交流電訊號轉換為磁場； 一第一電容，一端連接於該第一線圈的一端； 一第二電容，一端連接於該第一電容的另一端，且該第二電容的另一端連接於該第一線圈的另一端；以及 一第一電感，一端連接於該第一電容的另一端及該第二電容的一端，且該第一電感的另一端用於接收該交流電訊號； 其中該第一電容的一電容值及該第二電容的一電容值中的至少一者取決於該第一線圈的該電感值。A wireless charging device including: A first coil has a radius of curvature and an inductance value associated with the radius of curvature, and is used to convert an alternating current signal into a magnetic field; a first capacitor, one end connected to one end of the first coil; a second capacitor with one end connected to the other end of the first capacitor, and the other end of the second capacitor connected to the other end of the first coil; and A first inductor with one end connected to the other end of the first capacitor and one end of the second capacitor, and the other end of the first inductor is used to receive the AC signal; At least one of a capacitance value of the first capacitor and a capacitance value of the second capacitor depends on the inductance value of the first coil.如請求項1所述的無線充電裝置， 其中該第一線圈的該電感值、該第一電容的該電容值及該第二電容的該電容值滿足以下關係式：其中L_tp為該第一線圈的該電感值，C_tp為該第一電容的該電容值，C_ts為該第二電容的該電容值，且ω為該交流電訊號的一振盪角頻率。The wireless charging device of claim 1, wherein the inductance value of the first coil, the capacitance value of the first capacitor, and the capacitance value of the second capacitor satisfy the following relationship: Where L_tp is the inductance value of the first coil, C_tp is the capacitance value of the first capacitor, C_ts is the capacitance value of the second capacitor, and ω is an oscillation angular frequency of the AC signal.如請求項1所述的無線充電裝置，更包含： 一第二線圈，具有一曲率半徑及關聯於該曲率半徑的一電感值，且用於將該交流電訊號轉換為磁場； 一第三電容，一端連接於該第二線圈的一端； 一第四電容，一端連接於該第三電容的另一端，且該第四電容的另一端連接於該第二線圈的另一端；以及 一第二電感，一端連接於該第三電容的另一端及該第四電容的一端，且該第二電感的另一端用於接收該交流電訊號； 其中該第三電容的一電容值及該第四電容的一電容值中的至少一者取決於該第二線圈的該電感值，該第一線圈為一Q型線圈，該第二線圈為一DD型線圈。The wireless charging device as described in claim 1 further includes: a second coil having a radius of curvature and an inductance value associated with the radius of curvature, and used to convert the alternating current signal into a magnetic field; a third capacitor, one end connected to one end of the second coil; A fourth capacitor has one end connected to the other end of the third capacitor, and the other end of the fourth capacitor is connected to the other end of the second coil; and a second inductor with one end connected to the other end of the third capacitor and one end of the fourth capacitor, and the other end of the second inductor is used to receive the AC signal; At least one of a capacitance value of the third capacitor and a capacitance value of the fourth capacitor depends on the inductance value of the second coil, the first coil is a Q-shaped coil, and the second coil is a DD type coil.如請求項1所述的無線充電裝置，更包含一開關元件，連接於該第一電感的該另一端，且用於使該交流電訊號導通至該第一線圈，或使該交流電訊號不被傳輸至該第一線圈。The wireless charging device of claim 1 further includes a switching element connected to the other end of the first inductor and used to conduct the AC signal to the first coil or prevent the AC signal from being transmitted. to the first coil.一種動態無線充電系統，包含： 多個傳輸線圈，各具有一曲率半徑及關聯於該曲率半徑的一電感值，各用於將一交流電訊號轉換為磁場； 多個補償電路，各包含： 一第一電容，一端連接於該些傳輸線圈中的一者的一端； 一第二電容，一端連接於該第一電容的另一端且該第二電容的另一端連接於該些傳輸線圈的該者的另一端；以及 一第一電感，一端連接於該第一電容的另一端及該第二電容的一端，且該第一電感的另一端用於接收該交流電訊號； 一接收線圈，用於將該些傳輸線圈中的至少二者各自產生的該磁場轉換為另一交流電訊號，且一端用於連接於一負載；以及 一補償電容，一端連接於該接收線圈且另一端用於連接於該負載， 其中該第一電容的一電容值及該第二電容的一電容值中的至少一者取決於該些傳輸線圈中的該者的該電感值。A dynamic wireless charging system containing: A plurality of transmission coils, each having a radius of curvature and an inductance value associated with the radius of curvature, are each used to convert an alternating current signal into a magnetic field; Multiple compensation circuits, each containing: a first capacitor, one end connected to one end of one of the transmission coils; a second capacitor with one end connected to the other end of the first capacitor and the other end of the second capacitor connected to the other end of the transmission coil; and A first inductor with one end connected to the other end of the first capacitor and one end of the second capacitor, and the other end of the first inductor is used to receive the AC signal; A receiving coil for converting the magnetic field generated by at least two of the transmission coils into another alternating current signal, and one end for connecting to a load; and a compensation capacitor, one end connected to the receiving coil and the other end used to connect to the load, At least one of a capacitance value of the first capacitor and a capacitance value of the second capacitor depends on the inductance value of the one of the transmission coils.如請求項5所述的動態無線充電系統，其中，該些傳輸線圈的一者的該電感值、該第一電容的該電容值、該第二電容的該電容值滿足以下關係式： ω(L_tp-1/ω²C_tp)-1/ωC_ts=0， 其中L_tp為該些傳輸線圈的一者的該電感值，C_tp為該第一電容的該電容值，C_ts為該第二電容的該電容值，且ω為該交流電訊號的一振盪角頻率。The dynamic wireless charging system of claim 5, wherein the inductance value of one of the transmission coils, the capacitance value of the first capacitor, and the capacitance value of the second capacitor satisfy the following relationship: ω( L_tp -1/ω² C_tp )-1/ωC_ts =0, where L_tp is the inductance value of one of the transmission coils, C_tp is the capacitance value of the first capacitor, and C_ts is The capacitance value of the second capacitor, and ω is an oscillation angular frequency of the alternating current signal.如請求項5所述的動態無線充電系統，其中該些傳輸線圈包含多個Q型線圈及多個DD型線圈，該些Q型線圈與該些DD型線圈彼此交錯排列。The dynamic wireless charging system of claim 5, wherein the transmission coils include multiple Q-shaped coils and multiple DD-shaped coils, and the Q-shaped coils and the DD-shaped coils are staggered with each other.如請求項5所述的動態無線充電系統，其中該接收線圈為一DDQ型串聯線圈。The dynamic wireless charging system of claim 5, wherein the receiving coil is a DDQ series coil.如請求項5所述的動態無線充電系統，更包含多個開關元件，該些開關元件中的每一者連接於該些補償電路中的一對應者的該第一電感的另一端，且用於使該交流電訊號導通至該些傳輸線圈中的一對應者，或使該交流電訊號不被導通至該些傳輸線圈中的該對應者。The dynamic wireless charging system as claimed in claim 5, further comprising a plurality of switching elements, each of the switching elements being connected to the other end of the first inductor of a corresponding one of the compensation circuits, and using In order to conduct the alternating current signal to a corresponding one of the transmission coils, or to prevent the alternating current signal from being conducted to the corresponding one of the transmission coils.如請求項9所述的動態無線充電系統，更包含： 多個電流感測器，分別連接於該些補償電路，該些電流感測器中的每一者用於感測該些補償電路中的一對應者的一電流；以及 一處理器，連接於該些電流感測器及該些開關元件，用於在判斷該些補償電路中的一第一補償電路的該電流的變化量大於一預設值且該些補償電路中的至少一第二補償電路的該電流大於零時，控制該些開關元件中與該第一補償電路連接的一第一開關元件為一關斷狀態，並控制該些開關元件中的一第二開關元件為一導通狀態； 其中該些傳輸線圈中對應於該第一開關元件的一第一傳輸線圈、對應於該至少一第二補償電路的至少一第二傳輸線圈以及對應於該第二開關元件的一第三傳輸線圈依序相鄰排列。The dynamic wireless charging system as described in claim 9 further includes: A plurality of current sensors are respectively connected to the compensation circuits, each of the current sensors is used to sense a current of a corresponding one of the compensation circuits; and A processor, connected to the current sensors and the switching elements, for determining that the change in the current of a first compensation circuit in the compensation circuits is greater than a preset value and that the current in the compensation circuits is greater than a preset value. When the current of at least one second compensation circuit is greater than zero, a first switching element connected to the first compensation circuit among the switching elements is controlled to be in an off state, and a second switching element among the switching elements is controlled. The switching element is in a conductive state; Among the transmission coils, there is a first transmission coil corresponding to the first switching element, at least a second transmission coil corresponding to the at least one second compensation circuit, and a third transmission coil corresponding to the second switching element. Arrange adjacently in order.

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