WO2022237067A1

WO2022237067A1 - Wireless charging anti-offset coupling mechanism

Info

Publication number: WO2022237067A1
Application number: PCT/CN2021/123886
Authority: WO
Inventors: 肖静; 尹立群; 吴晓锐; 龚文兰; 吴宁; 陈绍南; 韩帅; 陈卫东; 郭敏; 郭小璇; 梁水莹; 姚知洋; 阮诗雅; 赵立夏; 孙乐平
Original assignee: 广西电网有限责任公司电力科学研究院
Priority date: 2021-08-19
Filing date: 2021-10-14
Publication date: 2022-11-17
Also published as: ZA202210722B; CN113708506B; CN113708506A

Abstract

The present invention belongs to the technical field of wireless power transfer, and specifically relates to a wireless charging anti-offset coupling mechanism. The wireless charging anti-offset coupling mechanism comprises a transmitting-end mechanism and a receiving-end mechanism, wherein the transmitting-end mechanism comprises an energy transmitting coil and a transmitting-end resonant compensation network, and the transmitting-end resonant compensation network comprises a transmitting-end compensation coil; and the receiving-end mechanism comprises an energy receiving coil and a receiving-end resonant compensation network, and the receiving-end resonant compensation network comprises a receiving-end compensation coil. By means of the present invention, a compensation inductor is integrated into an energy transfer coil without mutual interference therebetween, and even if relative positions of an energy transmitting coil and an energy receiving coil have a certain offset and are not fully aligned, the function of transmitting energy by the energy transmitting coil to the energy receiving coil can also be well achieved, such that the anti-offset capability of the coupling mechanism is improved, and a system characteristic basically remains unchanged within a certain offset range; and the compensation inductor and the energy transfer coil are decoupled from each other, such that the problem of mutual interference therebetween is solved, thereby ensuring the constant-current output characteristic of a topology.

Description

A wireless charging anti-offset coupling mechanism

technical field

The invention belongs to the technical field of wireless power transmission, and in particular relates to a wireless charging anti-offset coupling mechanism.

Background technique

Wireless Power Transfer (WPT) technology provides an idea for solving the problem of safe, reliable, flexible and convenient power supply for electrical equipment. The wireless charging system based on the LCC-LCC compensation topology can realize the constant current output decoupled from the load, and the output power of the system is more stable within a certain offset range, and has received extensive attention in recent years. However, the introduction of the compensation inductor in the topology increases the volume and cost of the system, and also brings about the problem of mutual interference between the compensation inductor and the energy transmission coil, which brings difficulties to the structural design.

Contents of the invention

Aiming at the defects in the prior art, the present invention provides a wireless charging anti-offset coupling mechanism to solve the problem that in the prior art, the introduction of the compensation inductance of the compensation topology in the wireless charging system increases the system volume and cost, and also brings The problem of compensating the mutual interference between the inductance and the energy transmission coil is solved. In order to solve the above problems, the specific technical solutions of the present invention are as follows:

A wireless charging anti-offset coupling mechanism, comprising:

Transmitter mechanism and receiver mechanism;

The transmitter mechanism includes an energy transmitter coil and a transmitter resonance compensation network; the transmitter resonance compensation network includes a transmitter compensation coil, the energy transmitter coil is a unipolar coil, and the transmitter compensation coil includes two pairs of The same bipolar sub-coil with opposite directions; the energy transmitting coil and the transmitting end compensation coil are integrated on the same plane, and the energy transmitting coil is wound into a closed circle, and the first unwinding coil is left in the middle area, the transmitting end compensation coil is arranged in the first unwound area;

The receiving end mechanism includes an energy receiving coil and a receiving end resonant compensation network; the receiving end resonant compensation network includes a receiving end compensation coil, the energy receiving coil is a unipolar coil, and the receiving end compensation coil includes two pairs of The same bipolar sub-coils with opposite directions; the energy receiving coil and the receiving end compensation coil are integrated on the same plane, and the energy receiving coil is wound into a closed circle, leaving a second unwound coil in the middle area, the receiving end compensation coil is arranged in the second unwound area;

The energy transmitting coil is coupled to the energy receiving coil, the energy transmitting coil is decoupled from the receiving end compensation coil, the transmitting end compensation coil is decoupled from the energy receiving coil, and the transmitting end compensation coil is decoupled from the energy receiving coil. The receiving end compensation coil is decoupled, the energy transmitting coil is decoupled from the transmitting end compensation coil, and the energy receiving coil is decoupled from the receiving end compensation coil.

Preferably, the winding shapes of the two pairs of bipolar sub-coils of the compensation coil at the transmitting end and the two pairs of bipolar sub-coils of the compensation coil at the receiving end are different.

Preferably, the winding shape of each sub-coil of the compensation coil at the transmitting end and each sub-coil of the compensation coil at the receiving end is one of a loop coil, a triangular coil, a ring coil, and a sector coil.

Preferably, the winding shape and size of the energy transmitting coil and the energy receiving coil are the same.

Preferably, the winding shape of the energy transmitting coil and the energy receiving coil is one of loop coil, triangular coil, ring coil and sector coil.

Preferably, the outer sides of the energy transmitting coil and the energy receiving coil are provided with a magnetic core and a magnetic shielding layer

Preferably, the magnetic shielding layer includes an aluminum plate or a copper plate.

Preferably, the compensation coil at the transmitting end is located at the center of the energy transmitting coil; the compensation coil at the receiving end is located at the center of the energy receiving coil.

Preferably, the resonance compensation network at the transmitting end and the resonance compensation network at the receiving end are one of LCC-LCC, LCC-S, S-LCC, and LCL type resonance compensation networks.

The beneficial effects of the present invention are: the present invention provides a wireless charging anti-offset coupling mechanism, which integrates the compensation inductance into the energy transmission coil without interfering with each other, even if there is a certain deviation in the relative positions of the energy transmission coil and the energy reception coil. The degree of displacement is not completely aligned, and it can also well realize the function of transmitting energy from the energy transmitting coil to the energy receiving coil, which improves the anti-deflection ability of the coupling mechanism, and the system characteristics remain basically unchanged within a certain range of displacement; The compensation inductor and the energy transmission coil are decoupled from each other, which solves the problem of their mutual interference and ensures the constant current output characteristics of the topology.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the specific embodiments or the prior art. Throughout the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, elements or parts are not necessarily drawn in actual scale.

FIG. 1 is a schematic diagram of a wireless charging anti-offset coupling mechanism;

Fig. 2 is the schematic diagram of transmitting end mechanism;

Fig. 3 is the schematic diagram of receiving end mechanism;

Fig. 4 is the schematic diagram of LCC-LCC type resonant network structure topology;

Fig. 5 is the schematic diagram of LCC-LCC type resonant network equivalent circuit;

6 is a schematic diagram of the magnetic field distribution of a wireless charging anti-offset coupling mechanism;

Fig. 7 is a schematic diagram of the change of mutual inductance between the compensation coil at the transmitting end and the energy receiving coil after the offset of the wireless charging anti-offset coupling mechanism;

Fig. 8 is a schematic diagram of the change in mutual inductance between the compensation coil at the receiving end and the energy transmitting coil after the offset of a wireless charging anti-offset coupling mechanism;

Fig. 9 is a schematic diagram of the change in mutual inductance between the compensation coil at the transmitting end and the compensation coil at the receiving end after the offset of a wireless charging anti-offset coupling mechanism;

in:

10-transmitting end mechanism, 20-receiving end mechanism, 101-energy transmitting coil, 102 transmitting end compensation coil, 201 energy receiving coil, 202-receiving end compensation coil, 301-magnetic core, 302-magnetic shielding layer.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and/or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and/or collections thereof.

It should also be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural referents unless the context clearly dictates otherwise.

It should also be further understood that the term "and/or" used in the description of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations .

In order to solve the problem in the prior art that the introduction of the compensation inductance of the compensation topology in the wireless charging system increases the system size and cost, and also brings about the problem of mutual interference between the compensation inductance and the energy transmission coil, this embodiment proposes a wireless charging anti-corrosion The offset coupling mechanism can be applied to wireless charging scenarios such as automobiles and drones, see Figure 1 to Figure 3. The wireless charging anti-offset coupling mechanism includes:

Transmitter mechanism 10 and receiver mechanism 20;

The transmitting end mechanism 10 includes an energy transmitting coil 101 and a transmitting end resonant compensation network, and the transmitting end resonant compensation network includes a transmitting end compensation coil 102; the energy transmitting coil 101 is a monopolar coil, which is formed by a wire plane winding; The end compensation coil 102 includes two pairs of bipolar sub-coils with the same size and opposite directions. These four sub-coils are formed by a plane winding of a wire; the energy transmitting coil 101 and the transmitting end compensation coil 102 are integrated on the same plane. The energy transmitting coil 101 is wound into a closed circle, and a first unwound area is left in the middle, and the transmitting end compensation coil 102 is arranged in the first unwound area, that is, the energy transmitting coil 101 is arranged along the outer circumference of the transmitting end compensating coil 102 Winding, the energy transmitting coil 101 is located on the outer periphery of the compensating coil 102 at the transmitting end. The compensation coil 102 at the transmitting end in this embodiment can achieve decoupling from the energy transmitting coil 101 within a certain offset range.

The receiving end mechanism 20 includes an energy receiving coil 201 and a receiving end resonant compensation network, and the receiving end resonant compensation network includes a receiving end compensation coil 202; the energy receiving coil 201 is a unipolar coil, which is formed by a wire plane winding; The end compensation coil 202 includes two pairs of bipolar sub-coils with the same size and opposite directions. These four sub-coils are formed by a plane winding of a wire; the energy receiving coil 201 and the receiving end compensation coil 202 are integrated on the same plane, The energy receiving coil 201 is wound into a closed circle, and there is a second unwound area in the middle, and the receiving end compensation coil 202 is arranged in the second unwound area, that is, the energy receiving coil 201 is along the outer circumference of the receiving end compensation coil 202 Winding, the receiving end compensation coil 202 is located on the outer periphery of the energy receiving coil 201 . The compensation coil 202 at the receiving end in this embodiment can achieve decoupling from the energy receiving coil 201 within a certain offset range.

The resonance compensation network at the transmitting end and the resonance compensation network at the receiving end in this embodiment may be based on one of LCC-LCC, LCC-S, S-LCC, and LCL type resonance compensation networks.

In this embodiment, the energy transmitting coil 101 is coupled to the energy receiving coil 201, the energy transmitting coil 101 is decoupled from the receiving end compensation coil 202, the transmitting end compensation coil 102 is decoupled from the energy receiving coil 201, and the transmitting end compensation coil 102 is connected to the receiving end The compensation coil 202 is decoupled, the energy transmitting coil 101 is decoupled from the transmitting end compensation coil 102 , and the energy receiving coil 201 is decoupled from the receiving end compensation coil 202 . In this embodiment, except that the energy transmitting coil 101 and the energy receiving coil 201 are coupled to each other, the other two coils are decoupled from each other, that is, there is no mutual interference between the other two coils. By designing the compensation coil as two mutually decoupled bipolar sub-coils, the anti-offset capability of the coupling mechanism is improved.

In this embodiment, by setting the energy transmitting coil 101 and the transmitting end compensation coil 102 on the same plane, and the energy transmitting coil 101 is wound along the outer circumference of the transmitting end compensation coil 102, and the energy receiving coil 201 and the receiving end compensation coil 202 are arranged on the same plane, and the energy receiving coil 201 is wound along the outer circumference of the receiving end compensation coil 202, and except for the mutual coupling between the energy transmitting coil 101 and the energy receiving coil 201, the other two coils are decoupled from each other, That is to say, the compensation inductance is integrated into the energy transmitting coil 101 and the energy receiving coil 201 without interfering with each other. Even if the relative positions of the energy transmitting coil 101 and the energy receiving coil 201 have a certain degree of deviation and are not completely aligned, they can be easily The function of transmitting energy from the energy transmitting coil 101 to the energy receiving coil 201 is well realized, and the anti-offset ability of the coupling mechanism is improved. The wireless charging anti-offset coupling mechanism of this embodiment has a strong anti-offset ability, The system characteristics remain basically unchanged within the shift range. The compensation inductor and the energy transmission coil are decoupled from each other, which solves the problem of their mutual interference and ensures the constant current output characteristics of the topology.

The size of the compensation coil 102 at the transmitting end and the compensation coil 202 at the receiving end can be set according to actual needs, which is not limited in this embodiment. In one embodiment, referring to FIG. 2 and FIG. 3, the shape (loop coil) and winding direction of the energy transmitting coil 101 are shown in FIG. Shaped coil), position and winding direction; Figure 3 shows the shape (loop coil) and winding direction of energy receiving coil 201, and the shape (triangular coil) and position of the four sub-coils of receiving end compensation coil 202 and the winding direction; the arrows in Figure 2 and Figure 3 represent the winding direction of the coil.

Optionally, in this embodiment, the winding shapes of the two pairs of bipolar sub-coils of the compensation coil 102 at the transmitting end and the two pairs of bipolar sub-coils of the compensation coil 202 at the receiving end are different, so as to realize the solution of the two. couple. For example, the winding shapes of the two pairs of bipolar sub-coils of the compensation coil 102 at the transmitting end are loop coils, and the winding shapes of the two pairs of bipolar sub-coils of the compensation coil 202 at the receiving end are both triangular coils. Optionally, in this embodiment, the winding shape of each sub-coil of the compensation coil 102 at the transmitting end and each sub-coil of the compensation coil 202 at the receiving end is one of a loop coil, a triangular coil, a ring coil, and a sector coil. kind.

In this embodiment, the winding shape of the energy transmitting coil 101 and the energy receiving coil 201 can be the same or different, and the winding size can be the same or different, as long as a certain degree of coupling between the two is ensured. For example, the winding shape of the energy transmitting coil 101 and the energy receiving coil 201 can all be set as loop coils, and the size is the same, and the winding shape and size of the energy transmitting coil 101 and the energy receiving coil 201 are all the same. It is more reasonable; it is also possible that the winding shape of the energy transmitting coil 101 is set as a circular coil, and the winding shape of the energy receiving coil 201 is set as an elliptical loop coil, and the sizes are different. Optionally, in this embodiment, the winding shape of the energy transmitting coil 101 and the energy receiving coil 201 is one of a loop coil, a triangular coil, a ring coil, and a sector coil.

Optionally, in this embodiment, the outer sides of the energy transmitting coil 101 and the energy receiving coil 201 are provided with a magnetic core 301 and a magnetic shielding layer 302 to enhance the coupling strength between the energy transmitting coil 101 and the energy receiving coil 201, Simultaneously achieve magnetic shielding. Optionally, in this embodiment, the magnetic shielding layer 302 includes an aluminum plate or a copper plate.

Optionally, in this embodiment, referring to FIG. 2 and FIG. 3 , the compensation coil 102 at the transmitting end is located at the center of the energy transmitting coil 101 ; the compensation coil 202 at the receiving end is located at the center of the energy receiving coil 201 . The compensation coil is integrated in the middle of the energy transmission coil without mutual interference, and the compensation coil and the energy transmission coil share a set of magnetic core 301 and magnetic shielding layer 302, which reduces system volume and cost.

Optionally, in this embodiment, the shape and size of the winding area left for the transmitting end compensation coil 102 in the middle of the energy transmitting coil 101 is the same as the shape and size of the winding area left for the receiving end compensation coil 202 in the middle of the energy receiving coil 201 and the same size.

Referring to Figure 1 to Figure 9, the following will be explained with the LCC-LCC type resonance compensation network:

The LCC-LCC topology is shown in Figure 4. U _dc is the DC power input, and MOSFETs V1~V4 form a full-bridge inverter circuit.

represent the system input AC voltage and current vector respectively, L ₁ is the self-inductance of the energy transmitting coil 101, L ₂ is the self-inductance of the energy receiving coil 201, M is the mutual inductance between the energy transmitting coil 101 and the energy receiving coil 201, L _1P , C _1P and C _2P form the resonant compensation network at the transmitting end, L _1S , C _1S and C _2S form the resonant compensation network at the receiving end, and output DC power to the load through the rectification and filtering link, and R _L represents the load resistance.

The equivalent circuit of the LCC-LCC resonant network is shown in Figure 5, and the equivalent load resistance R _eq expression is:

The analysis of the compensation network at the energy transmitter includes:

The analysis of the compensation network at the energy pickup end includes:

The system is in a resonant state when it works normally. For the analysis of the energy receiving end, its equivalent impedance is:

So there are:

From formula (6), we can see that the impedance of the pick-up end

In the resonant state, it is only related to the load. When the load is a pure resistive load,

Shown as pure resistance. It can be seen from (7) that the load current

Mutual inductance value M with the coupling mechanism, power transmitter current

resonant network

related.

For reflective impedance there are:

The input impedance is:

So there are:

It can be seen from formula (10) that after the current of the energy transmitting coil 101 is determined in the system, its parameters and operating frequency remain basically unchanged, and the current at the transmitting end is only related to the input voltage of the transmitting end. Therefore, when the input voltage of the transmitting end is constant, the transmitting end can Keep working in a constant current state, and its constant current output characteristics make the current of the energy transmitting coil 101 not change with the load, and the transmitting magnetic field is stable. Combining with formula (7), it can be seen that when the system input voltage and resonant network parameters are determined, the output current of the pick-up terminal

It is only related to the mutual inductance M of the coupling mechanism, and has nothing to do with the load.

The coupling mechanism integration scheme based on LCC-LCC topology is shown in Figure 1 to Figure 3. Utilizing the decoupling principle of bipolar coils and unipolar coils, the compensation coil (including the transmitter compensation coil 102 and the receiver compensation coil 202) is integrated with the energy transmitter coil 101 and the energy receiver coil 201 respectively in one plane, and at the same time The compensation coils are designed as two bipolar sub-coils that are decoupled from each other, only the mutual coupling between the energy transmitting coil 101 and the energy receiving coil 201 is retained, and the other coils are decoupled from each other, ensuring the constant current output characteristics of the topology. At the same time, the coupling mechanism has good anti-offset performance, and the characteristics of the coupling mechanism basically remain unchanged when the X-axis and Y-axis are offset within a certain range.

As shown in FIGS. 1 to 3 , the energy transmitting coil 101 and the energy receiving coil 201 are loop coils, and the corresponding compensation coils are integrated on the same plane and located inside the energy transmitting coil 101 and the energy receiving coil 201 . The compensation coil is composed of two pairs of bipolar sub-coils with the same size and opposite directions, which can realize decoupling with the loop coil within a certain offset range, and the compensation coil 102 at the transmitting end and the compensation coil 202 at the receiving end are not coupled to each other. Only the coupling between the energy transmitting coil 101 and the energy receiving coil 201 is kept, thereby ensuring the constant current output characteristic of the topology. A magnetic core 301 and a magnetic shielding layer 302 are integrated outside the energy transmitting coil 101 and the energy receiving coil 201 to enhance the coupling strength between the coils and realize the shielding of the coupling mechanism at the same time.

In one embodiment, the parameters of the wireless charging anti-offset coupling mechanism are shown in Table 1 below:

Table 1

When the energy transmitting coil 101 is facing the energy receiving coil 201, the simulation results of the coupling mechanism are shown in Table 2 below:

Table 2

参数parameter	数值value
L ₁ L ₁	216.64μH216.64μH
L ₂ L ₂	216.6μH216.6μH
Mm	97.99μH97.99μH
L _1s L _1s	64μH64μH
L _1p L _1p	67.76μH67.76μH
M _1s-1 M _1s-1	0.37μH0.37μH
M _1p-2 M _1p-2	0.001μH0.001μH
M _1p-1 M _1p-1	0.049μH0.049μH

M _1s-2 M _1s-2	1.74μH1.74μH
M _1s-1p M _1s-1p	0.6μH0.6μH

As can be seen from the above table, compared with the mutual inductance M between the energy transmitting coil 101 and the energy receiving coil 201, the mutual inductance M 1s-1p between the transmitting end compensation coil 102 and the receiving end compensation coil 202, the mutual inductance M _1s-1p between the compensation coil and the energy transmitting coil Mutual inductance [M _1s-1 (mutual inductance between the receiving end compensation coil 202 and the energy transmitting coil 101), M _1p-2 (mutual inductance between the transmitting end compensation coil 102 and the energy receiving coil 201), M _1p-1 (transmitting The mutual inductance between the end compensation coil 102 and the energy transmitting coil 101), M _1s-2 (the mutual inductance between the receiving end compensation coil 202 and the energy receiving coil 201) is very small and can be ignored. The magnetic field distribution of the coupling mechanism is shown in Fig. 6, if it is not clear in Fig. 6, it will not affect the solution of this embodiment. Due to the effect of the magnetic core 301 and the magnetic shielding layer 302, the magnetic field is all concentrated inside the coupling mechanism, and there is almost no magnetic flux leakage.

Referring to Fig. 7 to Fig. 9, Fig. 7 to Fig. 9 show the variation of the mutual inductance of the coupling mechanism during lateral displacement, and the displacement range is [-8cm, 8cm]. Due to the symmetry of the coil structure, when the longitudinal offset occurs, the change of the mutual inductance is consistent with that of the lateral offset. It can be seen that when the mutual inductance between the compensation coils and between the compensation coil and the energy transmission coil changes within ±8cm, the maximum value does not exceed 2μH, which is much smaller than the mutual inductance between the energy transmission coil 101 and the energy reception coil 201, and can be ignored . The system can maintain good coupling characteristics within a certain offset range, and the anti-offset tolerance of the coupling mechanism reaches 30%.

Those of ordinary skill in the art can realize that the units of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software In the above description, the composition of each example has been generally described in terms of functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

In the embodiments provided in this application, it should be understood that the division of units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units can be combined into one unit, and one unit can be dismantled Divided into multiple units, or some features can be ignored, etc.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. All of them should be covered by the scope of the claims and description of the present invention.

Claims

A wireless charging anti-offset coupling mechanism, characterized in that it includes:

Transmitter mechanism and receiver mechanism;

The transmitter mechanism includes an energy transmitter coil and a transmitter resonance compensation network; the transmitter resonance compensation network includes a transmitter compensation coil, the energy transmitter coil is a unipolar coil, and the transmitter compensation coil includes two pairs of The same bipolar sub-coil with opposite directions; the energy transmitting coil and the transmitting end compensation coil are integrated on the same plane, and the energy transmitting coil is wound into a closed circle, and the first unwinding coil is left in the middle area, the transmitting end compensation coil is arranged in the first unwound area;

The receiving end mechanism includes an energy receiving coil and a receiving end resonant compensation network; the receiving end resonant compensation network includes a receiving end compensation coil, the energy receiving coil is a unipolar coil, and the receiving end compensation coil includes two pairs of The same bipolar sub-coils with opposite directions; the energy receiving coil and the receiving end compensation coil are integrated on the same plane, and the energy receiving coil is wound into a closed circle, leaving a second unwound coil in the middle area, the receiving end compensation coil is arranged in the second unwound area;

The energy transmitting coil is coupled to the energy receiving coil, the energy transmitting coil is decoupled from the receiving end compensation coil, the transmitting end compensation coil is decoupled from the energy receiving coil, and the transmitting end compensation coil is decoupled from the energy receiving coil. The receiving end compensation coil is decoupled, the energy transmitting coil is decoupled from the transmitting end compensation coil, and the energy receiving coil is decoupled from the receiving end compensation coil.
The wireless charging anti-offset coupling mechanism according to claim 1, wherein the two pairs of bipolar sub-coils of the compensation coil at the transmitting end and the two pairs of bipolar sub-coils of the compensation coil at the receiving end are Winding shapes are different.
The anti-offset coupling mechanism for wireless charging according to claim 2, wherein the winding shape of each sub-coil of the compensation coil at the transmitting end and each sub-coil of the compensation coil at the receiving end is a loop coil, One of triangular coils, toroidal coils, and sector coils.
The anti-offset coupling mechanism for wireless charging according to claim 1, wherein the energy transmitting coil and the energy receiving coil have the same winding shape and size.
The wireless charging anti-offset coupling mechanism according to claim 4, wherein the winding shape of the energy transmitting coil and the energy receiving coil is one of a loop coil, a triangular coil, a ring coil, and a sector coil kind.
The wireless charging anti-offset coupling mechanism according to claim 1, characterized in that, the outer sides of the energy transmitting coil and the energy receiving coil are both provided with a magnetic core and a magnetic shielding layer
The wireless charging anti-offset coupling mechanism according to claim 6, wherein the magnetic shielding layer comprises an aluminum plate or a copper plate.
The wireless charging anti-offset coupling mechanism according to claim 1, wherein the compensation coil at the transmitting end is located at the center of the energy transmitting coil; the compensation coil at the receiving end is located at the center of the energy receiving coil location.
The wireless charging anti-offset coupling mechanism according to claim 1, wherein the resonant compensation network at the transmitting end and the resonant compensation network at the receiving end are LCC-LCC, LCC-S, S-LCC, or LCL type resonant compensation networks One of.