CN114520544A - Wireless power transmission coupling mechanism with compatibility - Google Patents

Abstract

The invention relates to the field of wireless power transmission, in particular to a wireless power transmission coupling mechanism with compatibility, which comprises a coupling mechanism main body and a coupling mechanism base body, wherein the coupling mechanism main body comprises: a transmitting end and a receiving end; the transmitting end comprises a first coil, a second coil, a third coil, a fourth coil and a transmitting end magnetic core which can change connection modes, and the receiving end comprises a receiving coil and a receiving end magnetic core; the transmitting end magnetic core comprises a first magnetic core block, a second magnetic core block, a third magnetic core block and a fourth magnetic core block; the receiving end comprises a receiving end plane spiral coil, a receiving end space spiral coil, a receiving end flat solenoid type coil and a receiving end magnetic core. The invention enables the transmitting end coil to be compatible with different types of receiving coils by optimizing the connecting mode of the transmitting end coil and the transmitting end coil, thereby improving the interoperability of the wireless power transmission coupling mechanism and further having important significance for promoting the large-scale application process of the wireless charging industry in China.

Description

A Compatible Wireless Power Transmission Coupling Mechanism

technical field

The invention relates to the field of wireless power transmission, in particular to a compatible wireless power transmission coupling mechanism.

Background technique

Compared with traditional charging methods, wireless power transmission technology has the characteristics of safety and flexibility, and has broad development potential in electric vehicles, consumer electronics, smart homes, medical care, etc. The magnetic coupling resonance wireless power transmission technology uses the transmitting end of the wireless power transmission to convert the high-frequency alternating electric field into a high-frequency alternating magnetic field, and transfers the energy to the load through the coupling of the receiving end. plays a vital role in the transmission system. And how to be compatible with different coil types becomes one of the design requirements of the magnetic coupler.

In addition, the commonly used coupling mechanisms for wireless power transmission systems include flat solenoid type, plane helical type, and space helical coil. The advantages of the flat solenoid type coupling mechanism are compact structure, light weight, and strong lateral offset resistance. , and the planar helical and space helical coupling mechanisms have the advantage of low leakage magnetic field, but the flat solenoid coil, the planar helical coil and the space helical coil have different requirements for the direction of the coupled magnetic field when they are used as receiving coils. Flat solenoid coils need to couple a magnetic field parallel to the plane of the transmitter, while planar helical coils and space helical coils need to couple a magnetic field perpendicular to the plane of the transmitter. The traditional wireless power transmission transmitter can only generate a magnetic field in one of the directions, and cannot take into account the flat solenoid receiver, the plane helix receiver, and the space helix receiver.

SUMMARY OF THE INVENTION

In order to solve the deficiencies mentioned in the above background art, the purpose of the present invention is to provide a wireless power transmission coupling mechanism with compatibility.

The object of the present invention can be realized through the following technical solutions:

A compatible wireless power transmission coupling mechanism, the coupling mechanism includes a transmitting end and a receiving end, the transmitting end and the receiving end are electrically connected, the transmitting end includes a transmitting coil and a transmitting end magnetic core, and the transmitting coil is wound around the On the magnetic core of the transmitting end;

The receiving end includes a receiving end plane spiral coil, a receiving end space helical coil, a receiving end flat solenoid type coil and a receiving end magnetic core, the receiving end plane helical coil, the receiving end space helical coil, and the receiving end flat solenoid type coil. The coils are all arranged on the magnetic field receiving side, and the flat solenoid coil at the receiving end is wound on the magnetic core at the receiving end.

Further, the transmitting coil includes a first coil, a second coil, a third coil, and a fourth coil; the transmitting-end magnetic core includes a first magnetic core block, a second magnetic core block, a third magnetic core block, and a fourth magnetic core block. Core block; the first coil is wound on the first magnetic core block to form a first section of the solenoid type coil transmitting end, the second coil is wound on the second magnetic core block to form a second section of the solenoid type transmitting end, The third coil is wound on the third magnetic core block to form a third section of the solenoid-type transmitting end, and the fourth coil is wound on the fourth magnetic core block to form the fourth section of the solenoid-type transmitting end.

Further, the first coil, the second coil, the third coil, and the fourth coil have the same size, and they are all rectangular solenoid coils; the first coil, the second coil, the third coil, and the fourth coil are made of the same The Litz wire is wound; the first coil, the second coil, the third coil, and the fourth coil are arranged in a counterclockwise direction, and the angle between adjacent coils is 90 degrees and closely arranged.

Further, the first magnetic core block, the second magnetic core block, the third magnetic core block, and the fourth magnetic core block have the same height, shape and size; the first magnetic core block, the second magnetic core block, The third magnetic core block and the fourth magnetic core block are cuboid ferrite strips with a length of 0.2-0.4L, where L is the total length of the transmitting end.

Beneficial effects of the present invention:

The invention can generate a magnetic field perpendicular to the transmitting end or a magnetic field parallel to the transmitting end by dividing the transmitting coil into four parts, adding a magnetic core in the middle of the coil, and connecting them in different ways. System compatibility.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. In other words, on the premise of no creative work, other drawings can also be obtained from these drawings;

Fig. 1 is the schematic diagram of the transmitting end of the coupling mechanism of the present invention;

Fig. 2 is the schematic diagram of the transmitting end and the flat solenoid type receiving end of the coupling mechanism of the present invention;

3 is a schematic diagram of the transmitting end of the coupling mechanism and the receiving end of the plane spiral coil of the present invention;

4 is a schematic diagram of the transmitting end of the coupling mechanism and the receiving end of the space helical coil according to the present invention;

FIG. 5 is a schematic diagram of the connection of a transmitting end suitable for a plane spiral type and a space spiral type receiving end according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the connection of a transmitting end suitable for a flat solenoid type receiving end according to an embodiment of the present invention;

7 is a schematic diagram of the spatial magnetic field line distribution suitable for a planar helical receiving coil generated by an embodiment of the present invention;

8 is a schematic diagram of the distribution of magnetic field lines in space suitable for a space helical receiving coil generated by an embodiment of the present invention;

9 is a schematic diagram of the spatial magnetic field line distribution suitable for a flat solenoid type receiving coil generated by an embodiment of the present invention;

Among them, the reference numerals are described as follows:

1a, the first coil; 1b, the second coil; 1c, the third coil; 1d, the fourth coil; 2a, the first magnetic core block of the transmitting end; 2b, the second magnetic core block of the transmitting end; 2c, the third magnetic core block of the transmitting end Magnetic core block; 2d, the fourth magnetic core block at the transmitting end; 5, the plane spiral coil at the receiving end; 6, the space spiral coil at the receiving end; 7, the flat solenoid type coil at the receiving end; 71, the magnetic core at the receiving end.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A compatible wireless power transmission coupling mechanism, as shown in Figure 1-4, the coupling mechanism includes a transmitter and a receiver, and the transmitter and receiver are electrically connected.

The transmitting end includes a transmitting coil and a transmitting end magnetic core, and the transmitting coil is wound on the transmitting end magnetic core. The transmitting coil includes a first coil 1a, a second coil 1b, a third coil 1c, and a fourth coil 1d; the transmitting-end magnetic core includes a first magnetic core block 2a, a second magnetic core block 2b, and a third magnetic core block 2c 2. The fourth magnetic core block 2d; the first coil 1a is wound on the first magnetic core block 2a to form the first segment of the solenoid coil transmitting end, and the second coil 1b is wound on the second magnetic core block 2b to form the first coil. Two-segment solenoid-type transmitting end, the third coil 1c is wound on the third magnetic core block 2c to form a third-segment solenoid-type transmitting end, and the fourth coil 1d is wound on the fourth magnetic core block 2d to form the first Four-segment solenoid type transmitter.

Changing the connection method between the transmitting coils can be applied to different types of receiving coils. At the same time, the four-segment transmitting ends are connected in series according to the direction of the inward excitation magnetic field, which is suitable for plane spiral or space spiral receiving coils; The two-stage transmitter ends are connected in series according to the ports that excite the magnetic field in the same direction, which is suitable for solenoid-type receiving coils.

Among them, the first coil 1a, the second coil 1b, the third coil 1c, and the fourth coil 1d have the same size and are all rectangular solenoid coils; the first coil 1a, the second coil 1b, the third coil 1c, the third coil The four coils 1d are wound from the same Litz wire; the first coil 1a, the second coil 1b, the third coil 1c, and the fourth coil 1d are arranged in a counterclockwise direction, and the angle between adjacent coils is 90 degrees and closely arranged.

Among them, the first magnetic core block 2a, the second magnetic core block 2b, the third magnetic core block 2c, and the fourth magnetic core block 2d have the same height, shape and size; the first magnetic core block 2a, the second magnetic core block The block 2b, the third magnetic core block 2c, and the fourth magnetic core block 2d are cuboid ferrite strips with a length of 0.2-0.4L, where L is the total length of the transmitting end. The length of the magnetic core block is a non-limiting preferred choice, and the length of the magnetic core block can be designed according to the actual situation. The shape of the magnetic core at the transmitting end includes a rectangular parallelepiped, and the shape is not strictly limited.

The receiving end includes the receiving end plane helical coil 5, the receiving end space helical coil 6, the receiving end flat solenoid coil 7 and the receiving end magnetic core 71, the receiving end plane helical coil 5, the receiving end space helical coil 6, the receiving end flat The solenoid coils 7 are all disposed on the magnetic field receiving side, and the flat solenoid coil 7 at the receiving end is wound on the magnetic core 71 at the receiving end.

Based on the above analysis, in order to generate a magnetic field perpendicular to the plane of the transmitting end to match the plane spiral or space spiral receiving coil, as shown in Fig. Connect the transmitting coil in the way of →B`, B→C`, C→D`. As shown in Figure 7 and Figure 8, the distribution diagram of the magnetic lines of force generated after the transmitting coil is connected according to the above connection method, it can be seen from the figure that above the transmitting coil A vertical magnetic field is generated that can be coupled with a planar helical coil or a space helical coil.

For the flat solenoid type receiving coil, a magnetic field parallel to the transmitting end is required to couple with it. As shown in Figure 6, the transmitting coil flows in from A` according to the current, A→C`, B and B`, D and D` If the connection is empty, a magnetic field with parallel magnetic flux will be generated above the transmitting end, as shown in Figure 9.

Compared with the existing technology, by dividing the transmitting coil into four parts and adding a magnetic core in the middle of the coil, and connecting them in different ways, a magnetic field perpendicular to the transmitting end or a magnetic field parallel to the transmitting end can be generated, which is suitable for a variety of receiving end coil types , to improve the compatibility of wireless power transfer system.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Various changes and modifications fall within the scope of the claimed invention.

Claims (4)

1. A wireless power transmission coupling mechanism with compatibility is characterized in that the coupling mechanism comprises a transmitting end and a receiving end, the transmitting end is electrically connected with the receiving end, the transmitting end comprises a transmitting coil and a transmitting end magnetic core, and the transmitting coil is wound on the transmitting end magnetic core;

the receiving terminal includes receiving terminal plane spiral coil (5), receiving terminal space spiral coil (6), the flat solenoid type coil of receiving terminal (7) and receiving terminal magnetic core (71), and receiving terminal plane spiral coil (5), receiving terminal space spiral coil (6), receiving terminal flat solenoid type coil of receiving terminal (7) all set up in the magnetic field receiving side, and the winding of receiving terminal flat solenoid type coil of receiving terminal (7) is on receiving terminal magnetic core (71).

2. A wireless power transfer coupling mechanism with compatibility according to claim 1, wherein the transmitting coil comprises a first coil (1a), a second coil (1b), a third coil (1c), a fourth coil (1 d); the transmitting end magnetic core comprises a first magnetic core block (2a), a second magnetic core block (2b), a third magnetic core block (2c) and a fourth magnetic core block (2 d); the first coil (1a) is wound on the first magnetic core block (2a) to form a first section of solenoid type coil transmitting end, the second coil (1b) is wound on the second magnetic core block (2b) to form a second section of solenoid type transmitting end, the third coil (1c) is wound on the third magnetic core block (2c) to form a third section of solenoid type transmitting end, and the fourth coil (1d) is wound on the fourth magnetic core block (2d) to form a fourth section of solenoid type transmitting end.

3. A compatible wireless power transmission coupling mechanism according to claim 2, wherein the first coil (1a), the second coil (1b), the third coil (1c) and the fourth coil (1d) have the same size and are all rectangular solenoid type coils; the first coil (1a), the second coil (1b), the third coil (1c) and the fourth coil (1d) are formed by winding the same litz wire; the first coil (1a), the second coil (1b), the third coil (1c) and the fourth coil (1d) are arranged in the anticlockwise direction, and the included angle between adjacent coils is 90 degrees and the adjacent coils are tightly arranged.

4. A compatible wireless power transmission coupling mechanism according to claim 2, wherein the first, second, third and fourth magnetic core blocks (2a, 2b, 2c, 2d) have the same height, shape and size; the first magnetic core block (2a), the second magnetic core block (2b), the third magnetic core block (2c) and the fourth magnetic core block (2d) are cuboid ferrite bars, the length is 0.2-0.4L, and L is the total length of the transmitting end.

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