CN220190534U - Economical coupling mechanism suitable for dynamic wireless charging - Google Patents
Economical coupling mechanism suitable for dynamic wireless charging Download PDFInfo
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- CN220190534U CN220190534U CN202321576949.7U CN202321576949U CN220190534U CN 220190534 U CN220190534 U CN 220190534U CN 202321576949 U CN202321576949 U CN 202321576949U CN 220190534 U CN220190534 U CN 220190534U
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Abstract
The utility model discloses an economical coupling mechanism suitable for dynamic wireless charging, which comprises rectangular coils, compensation coils, DD coils and receiving coils, wherein the rectangular coils, the compensation coils and the DD coils are connected in series to form a transmitting coil together, the compensation coils are positioned at the inner sides of the rectangular coils, the receiving coils comprise equidistant circular arc coils and circular coils, the circular coils are positioned at the outer sides of the equidistant circular arc coils, the length of the rectangular coils is six times of the radius of the receiving coils, the receiving coils are positioned in the area where the rectangular coils are positioned, only one transmitting coil works at the moment, and energy transmission is carried out among the rectangular coils, the compensation coils and the circular coils. The utility model provides an economical coupling mechanism suitable for dynamic wireless charging, which can eliminate cross coupling among transmitting coils and realize stable output by optimally designing the structure of the coupling mechanism of a dynamic wireless charging system.
Description
Technical Field
The utility model relates to the field of wireless power transmission, in particular to an economical coupling mechanism suitable for dynamic wireless charging.
Background
The utility model and application of the wireless power transmission technology change the use mode of the electric energy and bring infinite possibilities for unmanned and intelligent future social life and industrial production. The electric automobile industry is one of the most promising markets for wireless charging, and the wireless charging is helpful for eliminating the problems of electric shock hazard, cable aging and the like of the traditional plug-in charging, and the constraint of the cable is eliminated. One of the major problems in the current development of electric vehicles is that the battery technology is not improved due to the bottleneck, and high energy density cannot be realized, and the dynamic wireless charging technology can reduce the dependence of the electric vehicle on the battery capacity, so that the electric vehicle is a large power assisting device for electric vehicle popularization. However, the dynamic wireless charging technology has some problems, such as: when the vehicle-mounted transmitting coil moves, when the vehicle-mounted transmitting coil and the ground receiving coil are offset, fluctuation of transmission power and efficiency of the system can be caused, stable power transmission can not be realized, and the problem of extremely high early investment cost is solved. There are many studies to improve the problem of output power fluctuation, such as phase shift control of output voltage by control means, control by tracking frequency, etc., but these methods increase the control complexity of the system, and the control speed and accuracy are required for high-speed moving vehicles; or the long guide rail emission structure is utilized to realize stable output power, but the long guide rail design has the problems of larger magnetic leakage, low efficiency and the like; when the dynamic wireless charging coupling mechanism is optimally designed, stable output power and higher transmission efficiency can be simultaneously realized. At present, a plurality of researches on the optimal design of a dynamic wireless charging transmitting coil are carried out at home and abroad, including the optimal arrangement of ferrite so as to improve the economical efficiency of the system; the primary side transmitting coil structure design realizes stable output power and efficiency; and by optimizing the compensation topology and the inverter structure, the multiplexing of the compensation inverter device is realized, so that the early investment cost is saved on the premise of realizing stable output, and along with the continuous development of technology, the manufacturing process requirements of people on the coupling mechanism of dynamic wireless charging are higher and higher.
The prior wireless charging coupling mechanism has certain defects when in use, firstly, in the aspect of primary side transmitting coil structure design, the prior traditional transmitting coil provides a DD coil and rectangular coil alternate arrangement mode, double-layer DD coil misplacement, rectangular coil overlapping arrangement and split coil design, and the structure is mainly provided for solving the problem of fluctuation of transmission power and efficiency of a system in the secondary side coil moving process, but the problem of early input cost is not considered in the analysis process, and the number of coils, compensation, inverters and the like is large; the optimized compensation topology and the inverter structural design can realize lower early input cost compared with the traditional dynamic wireless charging system, but have higher requirements on the robustness of the control of the system, which is unfavorable for people, and in the existing dynamic wireless charging system structural design, only a single index of stable output of the system or lower early input cost is often considered, and the two indexes are not organically combined, so that the practical application of the dynamic wireless charging technology is unfavorable, and a certain adverse effect is brought to the practical use process.
Disclosure of Invention
The technical problems to be solved are as follows: aiming at the defects of the prior art, the utility model provides an economical coupling mechanism suitable for dynamic wireless charging, and provides a coupling mechanism design with economical efficiency, which can eliminate cross coupling among transmitting coils and realize stable output and can effectively solve the problems in the background technology by optimally designing the structure of the coupling mechanism of the dynamic wireless charging system.
The technical scheme is as follows: in order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides an economical coupling mechanism who is applicable to dynamic wireless charging, includes rectangular coil, compensation coil, DD coil and receiving coil, rectangular coil, compensation coil, DD coil establish ties and constitute transmitting coil jointly, compensation coil is located rectangular coil's inboard, receiving coil includes equidistance circular arc coil and circular coil, circular coil is located equidistant circular arc coil's outside, rectangular coil's length is receiving coil radius six times.
Preferably, the receiving coil is located in the area where the rectangular coil is located, at this time, only one transmitting coil works, and energy transmission is performed among the rectangular coil, the compensating coil and the circular coil.
Preferably, when the receiving coil is located in the region of the DD coil, both the transmitting coils are in a working state, and energy transmission is performed between the equidistant arc coils and the DD coil.
Preferably, the rectangular coil and the DD coil are connected in series and cross coupling is eliminated.
Preferably, the receiving coil is formed by overlapping equidistant circular arc coils and circular coils.
Preferably, the rectangular coil is six times larger than the radius of the receiving coil and is provided with one turn of compensation coil.
The beneficial effects are that: compared with the prior art, the utility model provides an economical coupling mechanism suitable for dynamic wireless charging, which has the following beneficial effects: the economic coupling mechanism suitable for dynamic wireless charging is designed by optimizing the structure of the coupling mechanism of a dynamic wireless charging system, the design of the coupling mechanism with economy is provided, which can eliminate cross coupling among transmitting coils and realize stable output, and the cross coupling is eliminated on the premise of tight placement by utilizing the series connection of rectangular coils and DD coils; the receiving coil is formed by overlapping equidistant circular coils and circular coils, so that stable output power and higher transmission efficiency can be realized under the condition that only one equidistant circular coil is needed to be added, and the requirement of a system on complex control is greatly reduced; utilize length for 6 times receiving coil radius's rectangular coil and 1 turn's compensation coil, can realize that the mutual inductance of great scope is stable to this has reduced the demand to control, has increased equivalent charge length ratio, has reduced the use of compensation element and dc-to-ac converter, has reduced earlier stage input cost, and the coupling mechanism simple structure of whole dynamic wireless charging, convenient operation, the effect of use is better for traditional mode.
Drawings
Fig. 1 is a schematic diagram of the overall structure of an economical coupling mechanism suitable for dynamic wireless charging according to the present utility model.
Fig. 2 is a schematic diagram illustrating a detailed coil structure in a coupling mechanism suitable for dynamic wireless charging according to the present utility model.
In the figure: 1. a rectangular coil; 2. a compensation coil; 3. DD coil; 4. a receiving coil; 5. equidistant arc coils; 6. a circular coil.
Detailed Description
The technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings and detailed description, but it will be understood by those skilled in the art that the examples described below are some, but not all, examples of the present utility model, and are intended to be illustrative of the present utility model only and should not be construed as limiting the scope of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 and 2, an economical coupling mechanism suitable for dynamic wireless charging comprises a rectangular coil 1, a compensation coil 2, a DD coil 3 and a receiving coil 4, wherein the rectangular coil 1, the compensation coil 2 and the DD coil 3 are connected in series to form a transmitting coil together, the compensation coil 2 is positioned at the inner side of the rectangular coil 1, the receiving coil 4 comprises equidistant circular arc coils 5 and circular coils 6, the circular coils 6 are positioned at the outer sides of the equidistant circular arc coils 5, the length of the rectangular coil 1 is six times of the radius of the receiving coil 4, and the economical coupling mechanism design capable of eliminating cross coupling between the transmitting coils and realizing stable output is provided by optimally designing the structure of the coupling mechanism of the dynamic wireless charging system, and by utilizing the series connection of the rectangular coil and the DD coil, the cross coupling is eliminated on the premise of close placement. The receiving coil is formed by overlapping equidistant circular coils and circular coils, so that stable output power and higher transmission efficiency can be realized under the condition that only one equidistant circular coil is needed to be added, and the requirement of a system on complex control is greatly reduced; the rectangular coil with the length being 6 times of the radius of the receiving coil and the 1-turn compensating coil are utilized, so that the large-range mutual inductance stability can be realized, the control requirement is reduced, the equivalent charging length ratio is increased, the use of the compensating element and the inverter is reduced, and the early investment cost is reduced.
Further, the receiving coil 4 is located in the area where the rectangular coil 1 is located, at this time, only one transmitting coil is operated, and energy transmission is performed among the rectangular coil 1, the compensating coil 2 and the circular coil 6.
Further, when the receiving coil 4 is located in the region of the DD coil 3, both transmitting coils are in a working state, and energy transmission is performed between the equidistant arc coil 5 and the DD coil 3.
Further, the rectangular coil 1 and the DD coil 3 are connected in series and cross-coupling is eliminated.
Further, the receiving coil 4 is formed by overlapping equidistant circular coils 5 and circular coils 6.
Further, the rectangular coil 1 is six times larger than the radius of the receiving coil 4 and one turn of the compensation coil 2 is provided.
Working principle: the utility model comprises a rectangular coil 1, a compensation coil 2, a DD coil 3, a receiving coil 4, equidistant circular arc coils 5 and a circular coil 6, adopts a mode that the rectangular coil 1, the compensation coil 2 and the DD coil 3 are connected in series to form a transmitting coil arrangement together, can realize the elimination of cross coupling under the condition of compact placement by optimizing the length of the DD coil, can realize zero cross coupling among the transmitting coils without overlapping or long-distance arrangement, simplifies the design of compensation topological elements, can not only improve the efficiency of a system, avoid the problem that the transmission power is suddenly reduced when the transmitting coils are arranged at long distances, but also can ensure enough charging length as far as possible, and improve the economical efficiency of the system. The receiving coil is formed by overlapping equidistant arc coils and a circular coil, the coil design is carried out in an arc mode, the effect of saving wires can be achieved, the equidistant arc coils 5 can compensate the problem that the power of the circular coil 6 in the DD coil 3 area drops sharply, and stable output power transmission is achieved. In order to further improve the economical efficiency of the system, the length of the rectangular coil 1 is set to be 6 times of the radius of the receiving coil, and through the use of the 1-turn compensation coil, a relatively stable mutual inductance area of the rectangular coil 1 is ensured, and stable output can be realized in the area without control, so that the use of an inverter and a compensation element can be reduced on the premise of ensuring higher transmission efficiency.
During the movement of the receiving coil, the specific energy transfer process is as follows: when the receiving coil is positioned in the area where the rectangular coil is positioned, only one transmitting coil works at the moment, and energy transmission is mainly carried out among the rectangular coil, the compensating coil and the circular coil, and stable output can be realized without excessive control because the mutual inductance is relatively stable at the moment; when the receiving coil is located in the DD coil area, the two transmitting coils are all in operation at the moment, wherein energy transmission is mainly carried out through the DD coil and the equidistant arc coils, and energy supplementation is carried out on the rectangular coil parts of the round coil and the two transmitting coils, so that output power is stable.
It should be noted that in this document, relational terms such as first and second (first and second), and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (6)
1. An economical coupling mechanism suitable for dynamic wireless charging comprises a rectangular coil (1), a compensation coil (2), a DD coil (3) and a receiving coil (4), and is characterized in that: the rectangular coil (1), the compensation coil (2) and the DD coil (3) are connected in series to form a transmitting coil together, the compensation coil (2) is located on the inner side of the rectangular coil (1), the receiving coil (4) comprises equidistant circular arc coils (5) and circular coils (6), the circular coils (6) are located on the outer side of the equidistant circular arc coils (5), and the length of the rectangular coil (1) is six times of the radius of the receiving coil (4).
2. An economical coupling mechanism for dynamic wireless charging as defined in claim 1, wherein: the receiving coil (4) is positioned in the area where the rectangular coil (1) is positioned, only one transmitting coil works at the moment, and energy transmission is carried out among the rectangular coil (1), the compensating coil (2) and the circular coil (6).
3. An economical coupling mechanism for dynamic wireless charging as defined in claim 1, wherein: when the receiving coil (4) is positioned in the region of the DD coil (3), the two transmitting coils are in a working state, and energy transmission is carried out between the equidistant arc coils (5) and the DD coil (3).
4. An economical coupling mechanism for dynamic wireless charging as defined in claim 1, wherein: the rectangular coil (1) and the DD coil (3) are connected in series and cross coupling is eliminated.
5. An economical coupling mechanism for dynamic wireless charging as defined in claim 1, wherein: the receiving coil (4) is formed by overlapping equidistant circular arc coils (5) and circular coils (6).
6. An economical coupling mechanism for dynamic wireless charging as defined in claim 1, wherein: the rectangular coil (1) is six times larger than the radius of the receiving coil (4) and is provided with one turn of compensation coil (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321576949.7U CN220190534U (en) | 2023-06-20 | 2023-06-20 | Economical coupling mechanism suitable for dynamic wireless charging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321576949.7U CN220190534U (en) | 2023-06-20 | 2023-06-20 | Economical coupling mechanism suitable for dynamic wireless charging |
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- 2023-06-20 CN CN202321576949.7U patent/CN220190534U/en active Active
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