CN217216112U

CN217216112U - Transmitting device for multi-stage guide rail wireless energy transmission

Info

Publication number: CN217216112U
Application number: CN202220037246.6U
Authority: CN
Inventors: 谭森林; 赵鱼名; 李思平; 包清山; 瞿先奇; 蒲强
Original assignee: Chongqing Qianwei Radio Power Transmission Research Institute Co ltd
Current assignee: Chongqing Qianwei Radio Power Transmission Research Institute Co ltd
Priority date: 2022-01-07
Filing date: 2022-01-07
Publication date: 2022-08-16
Anticipated expiration: 2032-01-07

Abstract

The utility model discloses a transmitting device for multistage guide rail wireless energy transmission, including energy transmitting coil, energy transmitting coil is including the main coil that is the rectangular coil coiling, and the coiling is in inside and two at least compensating coil along the parallel range of main coil length direction of main coil, the main coil with compensating coil around to the same the main coil about both ends below has laid the magnetic core, the tip at both ends about the main coil with be close to the tip of two compensating coil at both ends is rolled over about the main coil turns over extremely the below of magnetic core becomes to turn over a section. When the transmitting guide rail is formed by using the transmitting device, the end parts of two adjacent energy transmitting coils can form a coil which is approximately rectangular, so that the directions of the magnetic fields of the two energy transmitting coils are uniform, the reverse magnetic field is weakened, the mutual inductance value of the cross connection area of the two adjacent energy transmitting coils is larger, and the mutual inductance fading problem caused by the left end and the right end of the energy transmitting coil is effectively overcome.

Description

Transmitting device for multi-stage guide rail wireless energy transmission

Technical Field

The utility model relates to a wireless energy transmission technology, specifically speaking relates to an emitter that is used for multistage guide rail wireless energy transmission.

Background

The dynamic wireless charging system is a wireless energy transmission system capable of wirelessly charging the electric equipment in the motion process of the electric equipment, and the wireless charging system of the electric automobile is a typical application.

In dynamic charging systems, two magnetic coupling schemes are typically used for implementation. One is a long guide rail type structure, and the other is a sectional type guide rail structure. The long guide structure is constituted by a coil having a dimension much longer than that of the pickup coil in the pickup end moving direction. Instead, the short track structure consists of a series of coils that are the same size as the pick-up coils. The long guide rail structure is researched mainly based on two reasons that the number of ground power supply equipment needed for simultaneously supplying power to a plurality of electric automobiles and less ground power supply equipment is convenient. However, the long rail structure necessarily results in a very small coupling coefficient between the launch end and the pick-up end. The long-distance transmitting end coil also necessarily generates a large parasitic resistance. The above two fatal drawbacks can cause the system to have low efficiency and serious electromagnetic interference problems. In contrast, the segmented track structure lends itself only to the portion actually coupled to the pick-up coil, which helps to improve the energy transfer efficiency and to avoid electromagnetic field radiation from the uncoupled track portion. Therefore, a segmented rail structure is generally adopted as an electromagnetic coupling scheme of a dynamic wireless charging system.

Although dynamic wireless charging systems employing segmented rail structures have many advantages, there are still some problems and challenges to be solved. Because the coupling degree between the pick-up end and the transmitting end changes along with the movement of the pick-up end and even drops to zero, when the pick-up end moves along the track, the output power fluctuates and drops, so that the pick-up coil has uneven pick-up electrode, and the use of the load is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an at first provide an emitter for multistage guide rail wireless energy transmission, can weaken energy transmission's fluctuation and fall, alleviate the influence of tip electric current to mutual inductance.

In order to achieve the above object, the utility model adopts the following specific technical scheme:

the transmitting device for the multi-stage guide rail wireless energy transmission comprises an energy transmitting coil and is characterized in that the energy transmitting coil comprises a main coil wound by a rectangular coil and at least two compensating coils wound in the main coil and arranged in parallel along the length direction of the main coil, the winding directions of the main coil and the compensating coils are the same, magnetic cores are laid below the left end and the right end of the main coil, and the end parts of the left end and the right end of the main coil and the end parts of the two compensating coils close to the left end and the right end of the main coil are folded to the lower part of the magnetic core to form folded sections.

Furthermore, the lengths of the turnover sections at the left end and the right end of the main coil are the same.

Furthermore, the two compensation coils at the left end and the right end have the same shape and size, and the lengths of the turnover sections of the two compensation coils are also the same.

Furthermore, the compensation coils are the same in size and are uniformly distributed in the main coil.

Furthermore, the plurality of compensation coils are wound in a rectangular shape, and two adjacent compensation coils are mutually abutted on the same plane.

Furthermore, a plurality of compensation coils are connected in series with the main coil.

Furthermore, the compensation section of the two compensation coils at the left end and the right end above the magnetic core and the turnover section below the magnetic core are arranged up and down symmetrically.

Furthermore, the magnetic core is a rectangular sheet magnetic core, and the energy emission section in the middle of the main coil is entirely positioned on the upper surface of the magnetic core.

The utility model discloses a show the effect and be:

1. the utility model designs the end structure of the energy transmitting coil, when the transmitting guide rail is formed by the transmitting device, the end parts of two adjacent energy transmitting coils can form a coil similar to a rectangle, so that the directions of the magnetic fields of the two energy transmitting coils are uniform, the reverse magnetic field is weakened, the mutual inductance value of the cross-connection area of the two adjacent energy transmitting coils is larger, and the mutual inductance fading problem caused by the left end and the right end of the energy transmitting coil is effectively overcome;

2. the utility model discloses under compensation coil's effect, can be applicable to the longer scene of main coil energy transmission section, offset because of the power consumption that main coil parasitic resistance leads to, coupling coefficient is bigger, and wireless energy transmission efficiency is higher and more stable.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a schematic overall structure diagram according to a first embodiment;

FIG. 2 is a layer relationship diagram according to the first embodiment;

FIG. 3 is a schematic winding diagram of an energy transmitting coil according to an embodiment;

the figure is marked with: the device comprises a 1-main coil, a 2-main coil energy transmission section, a 3-main coil turnover section, a 4-magnetic core, a 5-compensation coil and a 6-compensation coil turnover section.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Fig. 1 and 2 show a first embodiment of the present invention: the utility model provides an emitter for multistage guide rail wireless energy transmission, includes energy transmitting coil, energy transmitting coil is including the main coil 1 that is the winding of rectangular coil, and the coiling is in inside and two at least bucking coils 5 of following the parallel range of 1 length direction in the main coil 1, main coil 1 with bucking coil 5 winds to the same main coil 1 has laid magnetic core 4 in both ends below about main coil 1, the tip at both ends is turned over with being close to the tip of two bucking coils 5 at both ends about main coil 1 turns over to the below of magnetic core becomes turns over a section (main coil turns over a section 3 and bucking coil and turns over a section 6 promptly).

In specific implementation, in order to ensure the stability of wireless energy transmission as much as possible and improve the mutual inductance of the junction area of two adjacent energy transmitting coils when forming the transmitting guide rail, the lengths of the folded sections 3 at the left end and the right end of the main coil 1 are the same. The two compensation coils 5 at the left and right ends have the same shape and size, and the folded sections 6 of the two compensation coils 5 have the same length. Preferably, the compensation coils 5 are the same size and are uniformly distributed inside the main coil 1. The compensation coils 5 are all wound in a rectangular shape, and two adjacent compensation coils 5 are mutually abutted on the same plane. The two compensation coils 5 at the left end and the right end are arranged in a vertically symmetrical manner at a compensation section above the magnetic core and a turnover section 6 below the magnetic core.

As can be seen from fig. 2, the lengths of the folded sections 6 of the two compensation coils 5 at the left and right ends are respectively smaller than the lengths of the folded sections 3 at the left and right ends of the main coil 1. The bending angles of the left end and the right end of the main coil 1 and the bending angles of the compensation coils 5 at the left end and the right end are both 180 degrees, so that the main coil turning section 3 and the compensation coil turning section 6 are tightly attached to the lower surface of the magnetic core.

Fig. 2 also clearly shows the layered relationship of the energy transmitting coil, as can be seen from fig. 2, no matter the main coil 1 or the compensating coils 5 at the left and right ends, the inward-folded part can not only be far away from the receiving coil, but also can form a reserved space for sandwiching the magnetic core 4 with the main coil energy transmission section 2 and the compensating coil compensating section at the upper part, during the wireless energy transmission process, the section of the energy transmitting coil mainly realizing the power transmission can better transmit energy to one side of the pickup coil, and the partial coils (i.e. the main coil folded section 3 and the compensating coil folded section 6) at the left and right ends of the energy transmitting coil easily cause the mutual inductance drop can be shielded by the magnetic core 4, thereby reducing the influence on the power transmission.

The winding manner of the energy transmitting coil is shown in fig. 3, wherein the solid line represents a part of the energy transmitting coil (the main coil energy transmission section 2 and the compensation coil compensation section) at the upper end of the magnetic core 4, and the dotted line represents a part of the energy transmitting coil (i.e. the main coil folded section 3 and the compensation coil folded section 6) at the lower end of the magnetic core 4, and it can be seen from fig. 3 that a plurality of compensation coils 5 are connected in series with the main coil 1.

Referring to fig. 1, the magnetic core 4 is a rectangular sheet magnetic core, and the energy emitting section 2 in the middle of the primary coil is entirely located on the upper surface of the magnetic core 4. Because the main coil turning section 3 and the compensation coil turning section 6 are also tightly attached to the lower surface of the magnetic core 4, the design can ensure that the magnetic core 4 can be tightly attached to the energy transmitting coil, and the edge profile of the energy transmitting coil is just tangent to the edge profile of the magnetic core 4, so that the structure is compact, and the installation and the fixation are more convenient.

To sum up, the utility model discloses a design energy transmitting coil end structure, when utilizing emitter to constitute the transmission guide rail, two adjacent energy transmitting coil's tip can form the coil of an approximate rectangle for the two magnetic field direction is unified, has weakened the reverse magnetic field, and it is bigger to appear as the cross-connection regional mutual inductance value at two adjacent energy transmitting coil, thereby effectively overcomes the mutual inductance problem of declining that both ends arouse about the energy transmitting coil. The utility model discloses under compensating coil 5's effect, can be applicable to the longer scene of main coil energy transmission section 2, offset the power consumption because of main coil 1 parasitic resistance leads to, coupling coefficient is bigger, and wireless energy transmission efficiency is higher and more stable.

Finally, it should be noted that the above-mentioned technical solutions are only preferred embodiments of the present invention, and certainly, the scope of the present invention should not be limited thereby, and those skilled in the art can understand that all or part of the procedures of the above-mentioned embodiments can be realized, and the equivalent changes made according to the claims of the present invention still belong to the scope covered by the present invention.

Claims

1. The transmitting device for the multi-stage guide rail wireless energy transmission comprises an energy transmitting coil and is characterized in that the energy transmitting coil comprises a main coil wound by a rectangular coil and at least two compensating coils wound in the main coil and arranged in parallel along the length direction of the main coil, the winding direction of the main coil is the same as that of the compensating coils, magnetic cores are laid below the left end and the right end of the main coil, and the end parts of the left end and the right end of the main coil and the end parts of the two compensating coils close to the left end and the right end of the main coil are folded to the lower part of the magnetic cores to form folded sections.

2. The transmitting device for multi-stage guideway wireless energy transmission of claim 1, wherein the lengths of the folded sections at the left and right ends of the primary coil are the same.

3. The transmitting device for multi-stage guideway wireless energy transmission of claim 2, wherein the two compensation coils at the left and right ends have the same shape and size, and the lengths of the folded sections of the two compensation coils are also the same.

4. The transmitting device for multi-stage guideway wireless energy transmission of claim 3, wherein a plurality of compensation coils are the same size and are uniformly distributed inside the main coil.

5. The transmitting device for multi-stage rail wireless energy transmission according to claim 4, wherein the plurality of compensation coils are wound in rectangular shape, and two adjacent compensation coils are abutted against each other on the same plane.

6. The transmitting device for multi-stage rail wireless energy transmission according to any of claims 3 to 5, wherein a plurality of compensating coils are connected in series with the main coil.

7. The transmitting device for multi-stage guideway wireless energy transmission according to claim 6, wherein the two compensation coils at the left and right ends are arranged up and down symmetrically at the compensation section above the magnetic core and the turnover section below the magnetic core.

8. The transmitting device for multi-stage rail wireless energy transmission according to any of claims 1 to 5, wherein the magnetic core is a rectangular sheet-shaped magnetic core, and the energy transmitting section in the middle of the primary coil is entirely located on the upper surface of the magnetic core.