CN214674564U - Wireless energy emission guide rail and multi-guide-rail wireless energy transmission system - Google Patents
Wireless energy emission guide rail and multi-guide-rail wireless energy transmission system Download PDFInfo
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- CN214674564U CN214674564U CN202121286856.1U CN202121286856U CN214674564U CN 214674564 U CN214674564 U CN 214674564U CN 202121286856 U CN202121286856 U CN 202121286856U CN 214674564 U CN214674564 U CN 214674564U
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Abstract
The utility model belongs to the technical field of wireless power transmission, specifically provide a wireless energy transmission guide rail and many guide rails wireless energy transmission system, wherein wireless energy transmission guide rail includes energy transmitting coil and magnetic core, energy transmitting coil is pressed the rectangular coil coiling by the litz wire, and the energy transmission section at its middle part is located the upper surface of magnetic core, the energy changeover portion at both ends is followed about it the edge of magnetic core is around locating the lower surface of magnetic core. The effect is as follows: will the utility model provides a when wireless energy transmission guide rail uses in many guide rails wireless power transmission system, can effectively overcome the mutual inductance problem of declining that both ends arouse around the coil, simple structure, simple to operate moreover.
Description
Technical Field
The utility model relates to a wireless energy technical field, concretely relates to wireless energy transmission guide rail and many guide rails wireless energy transmission system.
Background
The wireless charging technology of the electric automobile is derived from a wireless electric energy transmission technology, and can adopt an electromagnetic induction type or resonant wireless transmission mode to transmit electric energy from a power supply device to the electric automobile, and the electric automobile charges a battery according to the received electric energy. However, due to the limitations of the energy density and the stored electric quantity of the battery, the charging speed cannot be greatly improved due to the limitations of the battery technology, the charging technology, the grid compatibility and the like, and the cruising ability of the electric automobile is further reduced.
At present, an energy transmitting coil can be laid on a driving lane of the electric automobile, an energy receiving coil is arranged on a vehicle body of the electric automobile, and the electric automobile in driving is charged in a mobile dynamic wireless mode so as to improve the cruising ability of the electric automobile. However, the mobile dynamic wireless charging method requires a guide rail containing an energy transmitting coil to be laid on a driving lane. If long sections of guide rails are laid, the cost of the system and the power consumption are very large. In order to solve the above problems, the prior art adopts the multi-segment guide rail type wireless charging road shown in fig. 1 to solve the problem of overlong guide rail setting, and generally combines technologies such as infrared sensing and RFID tag to realize identification switching of guide rails.
However, the prior art has the technical defects that:
by adopting the multi-section guide rail coupling mechanism shown in fig. 1, taking two sections of coils as an example, where 1 is an energy transmitting coil and 2 is an energy receiving coil, due to the influence of the transverse current at the end of the guide rail, the problem of output power drop caused by mutual inductance drop can be encountered in the transition region of two adjacent sections of guide rails, in addition, the problem of output power fluctuation can also be encountered when the coil enters and leaves, the influence effect is shown in fig. 2, where a is just entering the wireless charging region, C is leaving the wireless charging region, and B is the transition region of two adjacent sections of wireless energy transmitting guide rails, it can be seen that A, C two power fluctuations are serious, and the power drop phenomenon at B is serious.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a wireless energy transmission guide rail through improving guide rail structure, when making it be applied to among the many guide rails wireless energy transmission system, can effectively reduce the influence of coil end portion transverse current to mutual inductance.
In order to achieve the above object, the utility model adopts the following technical scheme:
a wireless energy transmission guide rail comprises an energy transmission coil and a magnetic core, and is characterized in that: the energy transmitting coil is formed by winding a litz wire according to a rectangular coil, an energy transmission section in the middle of the energy transmitting coil is arranged on the upper surface of the magnetic core, and energy transition sections at the left end and the right end of the energy transmitting coil are arranged on the lower surface of the magnetic core in a winding mode along the edge of the magnetic core.
Optionally, the magnetic core is a long strip, the middle of the left end and the right end of the magnetic core is provided with a protruding part, two shoulder sides of each protruding part are provided with openings, and transition sections at the left end and the right end of the energy emission coil are wound on the lower surface of the magnetic core along the openings on the corresponding side respectively.
Optionally, the protruding lengths of the protruding portions at the left end and the right end of the magnetic core are adapted to the wire diameter of the litz wire, so that the end edges of the protruding portions are tangent to the left outer diameter and the right outer diameter of the energy transmitting coil.
Optionally, the energy transmission section in the middle of the energy emitting coil is attached to the upper surface of the magnetic core, and the energy transition sections at the left and right ends of the energy emitting coil are attached to the lower surface of the magnetic core.
In combination with the above description of the wireless energy transmitting guide rail, another object of the present invention is to provide a multi-guide-rail wireless energy transmission system, which is characterized in that: the wireless energy transmitting guide rail comprises a plurality of sections of wireless energy transmitting guide rails which are sequentially arranged in the length direction, and an energy transmitting coil in each section of wireless energy transmitting guide rail is connected with a wireless energy transmitting circuit.
Optionally, a dc power supply, an inverter circuit, and a resonant capacitor connected in series or in parallel with the energy transmitting coil are disposed in the wireless energy transmitting circuit.
Optionally, the energy transmitting guide rail is embedded below the ground, and the receiving coil coupled with the energy transmitting coil is arranged on the electric trolley.
The utility model discloses a show the effect and be:
the provided wireless energy transmitting guide rail is simple in structure and convenient to install, and when the wireless energy transmitting guide rail is used in a multi-guide-rail wireless energy transmission system, the problem of mutual inductance fading caused by the front end and the rear end of a coil can be effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a prior art energy transmitting coil and a multi-track wireless energy transmission system;
FIG. 2 is a graph illustrating the effects of mutual inductance fading caused by an energy transmitting coil in the prior art;
fig. 3 is a side view of the wireless energy transmitting guide rail of the present invention;
fig. 4 is a rear view of the wireless energy transmitting rail of the present invention;
fig. 5 is a schematic view of a magnetic core structure in the wireless energy transmitting guide rail provided by the present invention;
fig. 6 is a schematic structural view of the wireless energy transmitting rail and the multi-rail wireless energy transmission system of the present invention;
fig. 7 is a diagram illustrating the mutual inductance fading effect caused by the wireless energy transmitting guide rail of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As can be seen from fig. 3 and 4, the embodiment provides a wireless energy transmission guide rail, which includes an energy transmission coil 1 and a magnetic core 3, wherein the energy transmission coil 1 is formed by winding litz wire in a rectangular coil, an energy transmission section at the middle of the energy transmission coil is disposed on the upper surface of the magnetic core 3, and energy transition sections at the left and right ends of the energy transmission coil are disposed on the lower surface of the magnetic core 3 along the edge of the magnetic core 3.
In specific implementation, the magnetic core 3 is in a long strip shape, as shown in fig. 5, a protruding portion is arranged between the left end and the right end of the magnetic core 3, two shoulder sides of the protruding portion at each end are provided with a notch, and transition sections at the left end and the right end of the energy emitting coil 1 are wound on the lower surface of the magnetic core 3 along the notches at the corresponding sides respectively.
For the convenience of installation, the protruding lengths of the protruding parts at the left end and the right end of the magnetic core 3 are matched with the wire diameter of the litz wire, so that the end edges of the protruding parts are tangent to the left outer diameter and the right outer diameter of the energy transmitting coil 1. The two adjacent sections of wireless energy transmitting guide rails can be better attached, the mutual inductance falling phenomenon of the transition area of the two adjacent sections of wireless energy transmitting guide rails can be better reduced, and the continuity of energy transmission is ensured.
As can also be seen from fig. 3 and 4, the energy transmission section in the middle of the energy transmitting coil is attached to the upper surface of the magnetic core, and the energy transition sections at the left and right ends of the energy transmitting coil are attached to the lower surface of the magnetic core.
As can be seen from fig. 6, the present embodiment further provides a multi-rail wireless energy transmission system, which includes multiple sections of wireless energy transmission rails, where the multiple sections of wireless energy transmission rails are sequentially arranged in a length direction, and an energy transmission coil in each section of wireless energy transmission rail is connected to a wireless energy transmission circuit. In fig. 6, an energy receiving coil 2 coupled with the energy transmitting coil 1 is correspondingly arranged, and in combination with an application scenario of wireless power supply of an electric trolley, the energy transmitting coil 1 is usually embedded below the ground, and the energy receiving coil 2 is arranged on the electric trolley.
In order to realize wireless energy transmission between the energy transmitting coil 1 and the energy receiving coil 2, a dc power supply, an inverter circuit, and a resonant capacitor connected in series or in parallel with the energy transmitting coil are generally disposed in the wireless energy transmitting circuit. A corresponding energy receiving circuit is usually also provided on one side of the energy receiving coil 2.
It can be seen through fig. 7 that, adopt the utility model provides a wireless energy transmission guide rail constitutes many guide rails wireless energy transmission system, and energy receiving coil just begins to get into wireless charging area and leaves wireless charging area at last when regional, and it is less to pick up the volatility of energy, and in the transition region department of two sections adjacent energy transmission guide rails, it is also less to fall mutually, compares with the effect that fig. 2 shows, and this system is whole in the transition state of relatively steady, has effectively overcome the technical problem that proposes in the background art.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (7)
1. A wireless energy transmission guide rail comprises an energy transmission coil and a magnetic core, and is characterized in that: the energy transmitting coil is formed by winding a litz wire according to a rectangular coil, an energy transmission section in the middle of the energy transmitting coil is arranged on the upper surface of the magnetic core, and energy transition sections at the left end and the right end of the energy transmitting coil are arranged on the lower surface of the magnetic core in a winding mode along the edge of the magnetic core.
2. The wireless energy transmission guide rail of claim 1, wherein: the magnetic core is long strip-shaped, the middle of the left end and the right end of the magnetic core is provided with a protruding part, two shoulder sides of each protruding part are provided with openings, and transition sections at the left end and the right end of the energy emission coil are wound on the lower surface of the magnetic core along the openings on the corresponding side respectively.
3. The wireless energy transmission guide rail of claim 2, wherein: the protruding length of the protruding parts at the left end and the right end of the magnetic core is matched with the wire diameter of the litz wire, so that the end edges of the protruding parts are tangent to the left outer diameter and the right outer diameter of the energy transmitting coil.
4. The wireless energy transmission guide rail of any one of claims 1-3, wherein: the energy transmission section in the middle of the energy transmitting coil is attached to the upper surface of the magnetic core, and the energy transition sections at the left end and the right end of the energy transmitting coil are attached to the lower surface of the magnetic core.
5. A multi-guide-rail wireless energy transmission system is characterized in that: the wireless energy emission guide rail comprises a plurality of sections of the wireless energy emission guide rail according to any one of claims 1 to 4, the plurality of sections of the wireless energy emission guide rail are sequentially arranged in the length direction, and a wireless energy emission circuit is connected to an energy emission coil in each section of the wireless energy emission guide rail.
6. The multi-rail wireless energy transfer system of claim 5, wherein: the wireless energy transmitting circuit is internally provided with a direct current power supply, an inverter circuit and a resonant capacitor connected with the energy transmitting coil in series or in parallel.
7. The multi-rail wireless energy transfer system of claim 5 or 6, wherein: the energy transmitting guide rail is embedded below the ground, and the receiving coil coupled with the energy transmitting coil is arranged on the electric trolley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121286856.1U CN214674564U (en) | 2021-06-09 | 2021-06-09 | Wireless energy emission guide rail and multi-guide-rail wireless energy transmission system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121286856.1U CN214674564U (en) | 2021-06-09 | 2021-06-09 | Wireless energy emission guide rail and multi-guide-rail wireless energy transmission system |
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| CN214674564U true CN214674564U (en) | 2021-11-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334437A (en) * | 2022-01-07 | 2022-04-12 | 重庆前卫无线电能传输研究院有限公司 | Winding method of energy transmitting coil and multi-stage guide rail wireless energy transmission system |
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2021
- 2021-06-09 CN CN202121286856.1U patent/CN214674564U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114334437A (en) * | 2022-01-07 | 2022-04-12 | 重庆前卫无线电能传输研究院有限公司 | Winding method of energy transmitting coil and multi-stage guide rail wireless energy transmission system |
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