CN210297354U - Magnetic coupling mechanism based on track wireless power supply system - Google Patents
Magnetic coupling mechanism based on track wireless power supply system Download PDFInfo
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- CN210297354U CN210297354U CN201921553681.9U CN201921553681U CN210297354U CN 210297354 U CN210297354 U CN 210297354U CN 201921553681 U CN201921553681 U CN 201921553681U CN 210297354 U CN210297354 U CN 210297354U
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Abstract
The utility model discloses a magnetic coupling mechanism based on track wireless power supply system, including magnetic core, receiving coil and alternating current track line, this scheme improves the design to magnetic core and relevant annex, through carrying out creative improvement design to the shape of magnetic core and the shape of support, and the magnetic core adopts two G type structural design, and two alternating current track lines correspond the center of passing upper and lower two recesses respectively, and the interior electric current direction of two alternating current track lines is opposite; compared with the prior art, the magnetic core structure in the scheme has a better magnetic gathering effect, so that magnetic field lines surrounding the alternating current track cable can be gathered in the magnetic core as much as possible, the problem of magnetic flux leakage of the magnetic core is reduced, and the energy output efficiency of the power supply device is improved; and the magnetic core adopts an integrated structure design, is convenient to install and maintain, and has higher practical and popularization values.
Description
Technical Field
The utility model relates to a wireless charging device technical field, concretely relates to magnetic coupling mechanism based on track wireless power supply system.
Background
The wireless power supply technology is a safe and convenient new technology, and provides energy supply for static or moving electric equipment in real time in a non-electric contact mode. The technology is a wireless electric energy transmission mode based on an inductive coupling principle, mainly takes a magnetic field as an electric energy transmission medium, and realizes wireless electric energy transmission by improving the frequency of the magnetic field and reducing air gap loss through a power electronic technology based on a transformer loose inductive coupling structure. The wireless power transmission technology has the characteristics of high transmission power which can reach kilowatt level and high efficiency in a very close distance.
The coupling mechanism of the track wireless power supply technology comprises a transmitting coil, a receiving coil and a magnetic core. By utilizing the magnetic conduction effect of the magnetic core, a high-frequency alternating magnetic field is generated in the receiving coil, so that current is induced. Wherein the magnetic core structure is mostly E type magnetic core or U type magnetic core. Traditional E type or U type magnetic core because its one side magnetic core is not closed, can not form the magnetic conduction return circuit, can lead to the magnetic core to have great magnetic leakage at the opening part, and this can lead to coupling mechanism's transmission efficiency to reduce, and then leads to system output and efficiency to reduce.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the lower problem of current track power supply energy coupling mechanism transmission efficiency, provide a magnetic coupling mechanism based on track wireless power supply unit to reduce the magnetic leakage, improve energy transmission efficiency.
The utility model discloses an adopt following technical scheme to realize: a magnetic coupling mechanism based on a track wireless power supply system, wherein the track wireless power supply system is used for supplying power to a movable device, the movable device moves along a track, the magnetic coupling mechanism comprises a pickup and an alternating current track wire, the pickup is fixed on the movable device, the pickup comprises a magnetic core and a receiving coil, the receiving coil is wound on the magnetic core, and the alternating current track wire penetrates through the magnetic core;
the magnetic core comprises an integrated frame formed by sequentially connecting an upper magnetic plate, a left magnetic plate, a lower magnetic plate and a right magnetic plate, a middle magnetic plate parallel to the upper magnetic plate and the lower magnetic plate is arranged at the middle position in the frame, two grooves are formed in the upper side and the lower side of the middle magnetic plate, and the receiving coil is wound on the middle magnetic plate; the intermediate position of left side magnetic sheet is provided with one and the relative opening of middle part magnetic sheet, and the last one end that is close to the open-ended of middle part magnetic sheet is provided with the magnetic sheet that blocks of perpendicular to middle part magnetic sheet, and open-ended length L1 is less than the length L2 that blocks the magnetic sheet, the exchange track line includes two, the center of two upper and lower recesses of passing that corresponds respectively, and two exchange track line internal current opposite directions.
Furthermore, the alternating current track line is supported by a support to keep horizontal, the support is arranged on the track, two support arms for supporting the alternating current track line are arranged on the support, the support arms extend into the grooves of the magnetic cores, a notch is formed in the support, and the remaining part of the left magnetic plate except the opening is embedded in the notch.
Furthermore, a hard insulating sleeve is arranged on the outer side of the alternating current track line and fixed on the support arm.
Furthermore, the support is made of rigid materials, so that structural strength is guaranteed, and deformation is prevented.
Furthermore, the bracket is made of PC material.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
the utility model discloses research has been carried out to wireless power supply system pickup ware magnetic core structure, has designed two G type magnetic core structures to cooperate with the structural design of support, the particularity of magnetic core structural design compares traditional E type magnetic core, and its transmission efficiency improves more than 30% at least, effectively improves coupling mechanism's electric energy transmission ability, improves system output; in addition, the magnetic core is of an integrated structure, the magnetic flux leakage phenomenon is reduced, the energy transmission efficiency is improved, meanwhile, the complexity of installation and maintenance is simplified, the equipment is more flexible to use, and the practical value is higher.
Drawings
Fig. 1 is a schematic structural diagram of a magnetic coupling mechanism according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a pickup according to an embodiment of the present invention;
fig. 3 is a schematic view of the magnetic field line distribution of a conventional E-shaped magnetic core according to an embodiment of the present invention;
fig. 4 is a schematic diagram of magnetic field line distribution of a magnetic core structure according to an embodiment of the present invention;
fig. 5 is a schematic view of a matching structure of the magnetic core and the bracket according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another magnetic core structure according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the above objects and advantages of the present invention, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, it should be noted that the positional relationships of the upper, lower, left, and right sides in the present embodiment are based on the directions shown in fig. 2, and the positional relationships are only for explanation and are not limited to the specific embodiments.
The embodiment of the invention relates to a magnetic coupling mechanism based on a track wireless power supply system, as shown in fig. 1-2, the magnetic coupling mechanism comprises a pickup and an alternating current track line 3, the pickup comprises a magnetic core 1 and a receiving coil 2, the magnetic core 1 comprises an integrated rectangular frame formed by sequentially connecting an upper magnetic plate, a left magnetic plate, a lower magnetic plate and a right magnetic plate, a middle magnetic plate parallel to the upper magnetic plate and the lower magnetic plate is arranged at the middle position in the rectangular frame, two grooves are formed on the upper side and the lower side of the middle magnetic plate, the receiving coil 2 is wound on the middle magnetic plate, an opening 11 opposite to the middle magnetic plate is arranged in the middle of the left magnetic plate, a blocking magnetic plate perpendicular to the middle magnetic plate is arranged at one end of the middle magnetic plate close to the opening 11, and the length L1 of the blocking magnetic plate is slightly greater than the length L2 of the opening 11; as shown in fig. 2, the ac track lines 3 include two lines, which respectively and correspondingly pass through the centers of the upper and lower grooves, and the directions of currents in the two ac track lines 3 are opposite.
To current track power supply technique, because exchange track cable self has certain quality, can lead to every section cable mid portion to hang down when unsettling it, in order to guarantee that whole track circuit is in on the same horizontal plane, every interval a short distance just need set up a support and support the track line. The distance of each bracket is changed along with the parameters of the track line, so that the sagging of the track line caused by self weight can not influence the sliding of the pickup. Therefore, in order to ensure smooth sliding of the pickup, the core must be provided with an opening so that the core can pass through the rail holder. The magnetic core opening inevitably causes magnetic leakage of the magnetic core, which reduces the energy transmission efficiency of the coupling mechanism, and the magnetic core cannot slide relative to the rail without the opening.
Specifically, in the present embodiment, the rail 6 is a fixed route along which the movable device travels, and the electric device (movable device) is suspended on the rail 6 and moves along the rail 6. Under the prerequisite that does not influence the consumer and remove, set up the support 5 that is used for fixed track line 3 to stretch out two long and thin support arms in support end position, stretch into the ware magnetic core recess of picking up, just be provided with the breach on the support 5, the part that opening 11 will left magnetic plate cut apart imbeds just in the breach, in order to further guarantee that whole track line is in same horizontal plane, use stereoplasm insulation support 4 to wrap up alternating current track line 3 after, will exchange on the support arm with alternating current track line 3 again.
The working principle of the magnetic coupling mechanism provided by the scheme is as follows:
it should be noted that the track wireless power supply system is used for supplying power to the movable device, and the system allows the electric device to pick up power when the electric device is moving or static. Thus, the core 1 and the part of the receiving coil 2 are fixed with the electrical equipment and move along the fixed line of the equipment. The ac track line 3 is substantially identical to the equipment moving line, so that the magnetic core 1 will move along the path of the ac track 3 when the system is in operation. High-frequency alternating current is introduced into the two track lines 3, a high-frequency alternating magnetic field is generated around the high-frequency alternating magnetic field, the magnetic field forms a magnetic circuit along the magnetic core 1, and then the high-frequency alternating current is induced in the receiving coil 2, so that electric energy transmission is completed. The two track lines 3 are located in the middle of the groove of the magnetic core 1, and the directions of the currents in the two track lines 3 are opposite, so that the magnetic fields generated by the two track lines are in the same direction in the middle of the magnetic core 1, which is equivalent to doubling the magnetic field of a single track line.
As shown in fig. 3, a magnetic field line distribution diagram of a conventional E-shaped magnetic core shows that there is no magnetic core at an opening of the magnetic core, which results in a large magnetic leakage of the structure, and the magnetic leakage is more serious because the magnetic field of the two side track lines is offset above the E-shaped magnetic core structure.
As shown in fig. 4, for the embodiment of the utility model provides a magnetic core structure be similar to two G types, fig. 4 is magnetic core magnetic field line distribution schematic diagram, because the opening is left in the centre of 1 left side magnetic sheet of two G type magnetic cores, and the magnetic core wall salient of left side magnetic sheet is in middle part magnetic sheet, the one end of middle part magnetic sheet is provided with the magnetic sheet that blocks that its direction of perpendicular to extends to bigger area forms the magnetic field return circuit, it is required to explain that, the opening width of this structure will guarantee that the picker can install smoothly and at the picker slip in-process with the support frictionless, the phenomenon of colliding with. As can be seen from fig. 4, in the magnetic core with this structure, there is a gap between the core walls, and when the magnetic permeability of the magnetic core is achieved, most of the magnetic paths enter the upper core wall again through the air gap, or enter the upper core wall from the middle core wall through the gap. Although the magnetic leakage and magnetic field offset phenomena exist at the tail ends of the two upper magnetic core walls, the magnetic leakage and magnetic field offset phenomena are weak because most of magnetic circuits are transmitted at the parts of the magnetic cores close to the two sides and the density of the magnetic circuits at the tail ends of the upper magnetic core walls is low. In conclusion, although the magnetic core structure is still provided with the magnetic core opening, the magnetic core structure basically has no magnetic leakage and has better magnetic conduction effect.
As shown in fig. 5, in cooperation with the structure of the magnetic core 1, a bracket 5 for supporting the high-frequency track line 3 is designed, the bracket extends from the middle of the magnetic core, two bracket arms are divided from the magnetic core structure near the tail end to support the track line 3, and two notches are formed at the positions where the magnetic core wall passes above the magnetic core, so that the magnetic core can smoothly pass through the bracket when sliding. Due to the existence of the notch and the bracket arm, when the bracket 5 supports the track line 3, the stress at the notch and the root of the bracket arm can be increased. In order to ensure the mechanical strength of the bracket, PC material is adopted for production and manufacture. The material is heat-resistant, impact-resistant and high in mechanical strength, and can ensure that the bracket 5 cannot deform and damage due to stress and collide with the magnetic core.
The utility model provides a magnetic core structure has better magnetic effect of gathering for prior art for the magnetic field that encircles alternating current track cable 3 can assemble in two G type magnetic cores 1 as far as, has reduced the magnetic leakage problem of magnetic core, has improved power supply unit's energy output efficiency. And the magnetic core is of an integrated structure, an additional magnetic core structure is not required to be supplemented, and the installation and maintenance of equipment are more convenient.
For the magnetic coupling mechanism provided by the scheme, ANSYS software experimental modeling analysis shows that compared with the traditional E-shaped magnetic core, on the premise that the length L of the magnetic core and the thickness of the magnetic core are equal, and all parameters of the coil are the same, the coupling coefficient of the magnetic core structure provided by the scheme is higher (the coupling coefficient of the magnetic core structure provided by the scheme is about 0.68, and the coupling coefficient of the traditional E-shaped magnetic core is only 0.52), and the higher the coupling coefficient is, the higher the transmission efficiency is. If the opening L1 of the magnetic core is reduced or the distance L3 between the left magnetic plate and the blocking magnetic plate is correspondingly reduced, or the length L2 of the blocking magnetic plate is increased, at least one of the above-mentioned 3 conditions is satisfied, so that the coupling coefficient is further increased, and therefore, the transmission efficiency of the magnetic core structure proposed by the present embodiment is improved more significantly.
In specific implementation, the size of the parameters is set according to actual conditions and requirements, such as L1 being smaller than 20mm, L2 being larger than 25mm, and L3 being smaller than 5mm, and the specific parameters are not limited herein. Of course, besides the above structure described in this embodiment, the magnetic core structure shown in fig. 6 may also be adopted without departing from the above design concept, and of course, corresponding adaptive improvement on the structure of the bracket is also needed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. Magnetic coupling mechanism based on track wireless power supply system, the track wireless power supply system is used for supplying power for mobile device, and mobile device moves along track (6), magnetic coupling mechanism includes pickup and alternating current track line (3), the pickup is fixed on mobile device, the pickup includes magnetic core (1) and receiving coil (2), receiving coil (2) twines on magnetic core (1), alternating current track line (3) pass magnetic core (1) setting, its characterized in that:
the magnetic core (1) comprises an integrated frame formed by sequentially connecting an upper magnetic plate, a left magnetic plate, a lower magnetic plate and a right magnetic plate, a middle magnetic plate parallel to the upper magnetic plate and the lower magnetic plate is arranged at the middle position in the frame, two grooves are formed in the upper side and the lower side of the middle magnetic plate, and the receiving coil (2) is wound on the middle magnetic plate; the intermediate position of left side magnetic sheet is provided with one and middle part magnetic sheet relative opening (11), and the one end that is close to opening (11) on the middle part magnetic sheet is provided with the magnetic sheet that blocks of perpendicular to middle part magnetic sheet, and the length L1 of opening (11) is less than the length L2 that blocks the magnetic sheet, exchange track line (3) including two, the center of two upper and lower recesses of passing that corresponds respectively, and two exchange track line (3) interior current opposite direction.
2. The magnetic coupling mechanism of a track-based wireless power supply system of claim 1, wherein: the alternating current track line (3) is supported through a support (5) to be horizontal, the support (5) is arranged on a track (6), two support arms used for supporting the alternating current track line (3) are arranged on the support (5), the support arms extend into a groove of the magnetic core (1), a notch is formed in the support (5), and the rest of the left magnetic plate except for the opening (11) is embedded in the notch.
3. The magnetic coupling mechanism of a track-based wireless power supply system of claim 2, wherein: and a hard insulating sleeve (4) is arranged on the outer side of the alternating current track line (3), and the hard insulating sleeve (4) is fixed on the support arm.
4. A magnetic coupling mechanism based on a rail wireless power supply system according to claim 2 or 3, characterized in that: the support (5) is made of rigid materials.
5. A magnetic coupling mechanism based on a rail wireless power supply system according to claim 2 or 3, characterized in that: the bracket (5) is made of PC material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921553681.9U CN210297354U (en) | 2019-09-18 | 2019-09-18 | Magnetic coupling mechanism based on track wireless power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921553681.9U CN210297354U (en) | 2019-09-18 | 2019-09-18 | Magnetic coupling mechanism based on track wireless power supply system |
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| CN210297354U true CN210297354U (en) | 2020-04-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110544988A (en) * | 2019-09-18 | 2019-12-06 | 青岛中科瑞信电力技术有限公司 | Magnetic coupling mechanism based on track wireless power supply system |
| CN112636484A (en) * | 2020-12-09 | 2021-04-09 | 北京临近空间飞行器系统工程研究所 | Guide rail type wireless energy supply system applied to aerospace craft |
-
2019
- 2019-09-18 CN CN201921553681.9U patent/CN210297354U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110544988A (en) * | 2019-09-18 | 2019-12-06 | 青岛中科瑞信电力技术有限公司 | Magnetic coupling mechanism based on track wireless power supply system |
| CN110544988B (en) * | 2019-09-18 | 2024-04-05 | 青岛中科瑞信无线充电技术有限公司 | Magnetic coupling mechanism based on track wireless power supply system |
| CN112636484A (en) * | 2020-12-09 | 2021-04-09 | 北京临近空间飞行器系统工程研究所 | Guide rail type wireless energy supply system applied to aerospace craft |
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