CN113991881A - Wireless power supply system with UT-type magnetic core and guide rail-type UT-type coupling structure - Google Patents
Wireless power supply system with UT-type magnetic core and guide rail-type UT-type coupling structure Download PDFInfo
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- CN113991881A CN113991881A CN202111272531.2A CN202111272531A CN113991881A CN 113991881 A CN113991881 A CN 113991881A CN 202111272531 A CN202111272531 A CN 202111272531A CN 113991881 A CN113991881 A CN 113991881A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
A wireless power supply system with a UT-type magnetic core and a guide rail type UT-type coupling structure relates to the field of design of coupling mechanisms of wireless power supply systems with rail limitation. To the problem that in current wireless power transmission technology, pick up mechanisms such as E type simple structure, coupling performance is not high, and double-ring shape and Y type pick up mechanism couple magnetic core easily saturate, pick up mechanisms such as S type can not use in monorail hoist' S power supply system, the technical scheme that this application adopted is: guide tracked UT type coupled structure wireless power supply system includes: the device comprises a transmitting guide rail, a receiving coil and a magnetic core; the transmission guide rail is at least one section, the magnetic core is a UT type magnetic core applied to the guide rail type wireless power supply system and consists of two parts, one part is of an E type structure, the other part is of a flat plate type structure, and the receiving coil is wound on a stand column in the middle of the E type structure; the magnetic core is coupled to the launch rail. The method is suitable for being applied to a monorail crane system adopting a dynamic wireless power transmission technology.
Description
Technical Field
The utility model relates to a coupling mechanism design field of wireless power supply system that has the track restriction, concretely relates to wireless power supply system of UT type magnetic core and guide tracked UT type coupling structure.
Background
The planning and construction of the green smart mine puts higher requirements on the safe electrical property of the underground electrical equipment with high gas dust. At present, the energy supply modes of underground electric equipment in a mine are mainly classified into three types, namely pantograph linear contact power supply, diesel engine energy supply and storage battery power supply. The monorail crane has been widely applied to coal mining transportation systems at home and abroad due to the advantages of strong traction capacity and high working efficiency. The adoption of a contact power supply mode can generate sparks and even explosion phenomena due to the contact of the electric wire; the diesel engine is adopted for supplying energy, so that the environment is easily polluted, and the diesel oil is not renewable and is not green and environment-friendly; the power supply mode of the storage battery is limited by the capacity of the storage battery, and the storage battery needs to return to the ground for charging at irregular time, so that remote construction operation cannot be carried out. The monorail crane system adopting the dynamic wireless power transmission technology avoids the safety problem caused by pantograph stringing contact power supply and the underground environmental pollution problem caused by diesel oil energy supply, can reduce the capacity requirement of a vehicle-mounted battery, increases the driving range and improves the convenience of power supply.
A monorail crane system adopting a dynamic wireless power transmission technology belongs to a guide rail type wireless power transmission system due to the limitation of a rail. The coupling mechanism is used as a bridge for realizing wireless power transmission and is the most important ring in system design, and comprises an energy emitting mechanism and an energy pickup mechanism. The emitting mechanism in the rail-type wireless power transmission technology is mostly long rail-type, but the structure of the picking mechanism is varied. Early studies have included E-, U-, S-type pick-up mechanisms. Thereafter, a double annular pickup mechanism and a Y-type pickup mechanism are proposed in successive documents. The E-type, U-type, S-type and other picking mechanisms are simple in shape and convenient to manufacture, but the coupling performance is not high, and the double-ring-shaped and Y-type picking mechanisms are high in coupling performance, but magnetic cores are easy to saturate when high power is transmitted.
The launch rail of the power supply system of a monorail hoist downhole is required to be suspended in the air, and therefore the shape of the core of the pick-up mechanism is also required, i.e. the coupling mechanism is able to pass smoothly through the transition node of the launch rail. Due to this limitation, pick-up mechanisms such as S-shaped, double loop and Y-shaped cannot be applied in the power supply system of the monorail crane.
Disclosure of Invention
The device aims at solving the problems that in the existing wireless power transmission technology, the E-shaped, U-shaped, S-shaped and other pick-up mechanisms are simple in shape and convenient to manufacture, but are not high in coupling performance, the double-ring-shaped and Y-shaped pick-up mechanisms are high in coupling performance, but magnetic cores are easy to saturate when high power is transmitted, and the S-shaped, double-ring-shaped and Y-shaped pick-up mechanisms cannot be applied to a power supply system of a monorail crane.
The present application includes two topics, respectively: UT type magnetic core, wireless power supply system of guide tracked UT type coupling structure, the concrete scheme is:
the UT-type magnetic core is characterized by comprising two parts, wherein one part is an E-type structure, the other part is a flat plate type structure, the flat plate type structure is fixed and covers the top end of a vertical plate in the middle of the E-type structure and is parallel to the bottom surface of the E-type structure, the width of a groove of the E-type structure is L, and the distance between the side edge of the flat plate type structure and the inner side wall of the groove of the E-type structure is larger than 0.3L.
Further, the flat plate structure is specifically as follows: rectangular.
Further, the thickness of the flat plate-shaped structure is the same as the thickness of the bottom surface of the E-shaped structure.
Guide tracked UT type coupled structure wireless power supply system includes: a guide rail; characterized in that the system comprises: the device comprises a transmitting guide rail, a receiving coil, a magnetic core and a power supply device; the launching guide rail is provided with at least one section, and each section comprises: the two sections of linear wires are parallel to each other, and the connecting wires are connected with a power supply device; the at least one section of emission guide rail is arranged in a straight line shape; the power supply device is used for supplying power to the transmitting guide rail; the magnetic core is a UT-type magnetic core as claimed in claim 1, the receiving coil is wound on the pillar in the middle of the E-type structure; two straight wires of the emission guide rail respectively pass through the two grooves of the magnetic core.
Furthermore, the connecting lead is of an arch structure.
Furthermore, the connecting wire is of a broken line type structure, and the included angle of the broken line type is smaller than 120 degrees.
Furthermore, the included angle of the broken line type is 45 degrees.
Further, the included angle of the broken line type is 60 degrees.
Further, the length of each section of the launching guide rail is 1.25 m.
Further, the length of each section of the launching guide rail is 1 m.
The application has the advantages that: the first subject of the present application is advantageous in that:
the technical scheme includes that the bias of the prior art is overcome, in the prior dynamic wireless power transmission technology of the monorail crane, because a transmitting guide rail is designed on the premise of saving power, a person skilled in the art usually adopts the transmitting guide rail with a sectional design, and a magnetic core with a closed top cannot freely move in the corresponding guide rail, so that the person skilled in the art only adopts the mode that the shape of the prior magnetic core is not changed, the purpose of transmitting more power to the crane is achieved by increasing the volume of the magnetic core, and the purpose of transmitting more power to the crane is achieved without considering the adoption of new characteristics added on the basis of the prior structure; the UT type magnetic core that this application provided is through on original E type magnetic core's basis, increases a dull and stereotyped structure that does not seal the opening of E type structure at its top, has increased the mutual inductance coefficient, can not hinder the magnetic core again simultaneously and freely move in corresponding guide rail. The difference between the magnetic core structure and the existing magnetic core structure is not particularly great, but the structural change is not a conventional design means in the field, and the structural change solves the technical problem which the existing magnetic core structure cannot solve and obtains unexpected technical results, and specifically comprises the following steps:
the UT-type magnetic core is extended in the travelling direction at the top end of the upright column in the middle compared with the existing E-type magnetic core, so that the magnetic core can capture more magnetic fields in the travelling direction; meanwhile, the UT-type magnetic core is extended in the direction horizontal to and vertical to the traveling direction, so that the magnetic resistance of a main magnetic circuit part of the coupling mechanism is reduced.
2. Set up the flat magnetic core on the basis of original E type magnetic core for UT type magnetic core simple manufacture.
3. The use of UT type cores at the same power transmission has a higher power density compared to other existing cores of the same volume.
4. The UT type magnetic core is used when the same power is transmitted, on the premise of ensuring the same power density, compared with other existing magnetic cores, the magnetic core has smaller volume and reduced cost, and meanwhile, because the magnetic core is small in volume and lighter in weight, the magnetic core is more suitable for being applied to light-weighted scenes such as a suspended wireless power supply system.
The second subject of the present application is advantageous in that:
compared with the practical application environment of a monorail crane under a mine, 1, the UT-type magnetic core is lighter under the premise of the same power density; 2. the UT type structure is easy to pass through the transition node of the transmitting guide rail, and 2, compared with the traditional E type coupling mechanism, the UT type magnetic core with the same volume has better coupling performance and higher power density.
The UT-type magnetic core is suitable for being applied to environments requiring light weight.
The wireless power supply system with the guide rail type UT coupling structure is suitable for being applied to a monorail crane system adopting a dynamic wireless power transmission technology.
Drawings
Fig. 1 is a schematic main body diagram of a UT-type magnetic core applied to a guideway wireless power supply system according to an embodiment;
fig. 2 is a schematic main body diagram of a wireless power supply system of a tracked UT-type coupling structure according to a fourth embodiment;
fig. 3 is a front view of a wireless power supply system of a rail-type UT-type coupling structure according to the fourth embodiment;
FIG. 4 is a side view of a wireless power supply system of a tracked UT-type coupling structure according to a fourth embodiment;
fig. 5 is a top view of a wireless power supply system of a tracked UT-type coupling structure according to the fourth embodiment;
FIG. 6 is a front view of a UT-type coupler core and its dimensional indicia as set forth in the first embodiment;
units in the figure are mm;
FIG. 7 is a side view of a UT-type coupler core and dimensional indicia thereof in accordance with one embodiment;
units in the figure are mm;
FIG. 8 is a top view of a UT-type coupler core and dimensional indicia thereof in accordance with an embodiment one;
units in the figure are mm;
the transmitting device comprises a transmitting guide rail 1, a magnetic core 2, a flat plate structure 21, a groove side wall 22 with an E-shaped structure, a groove 23 with an E-shaped structure, a bottom surface 24 with an E-shaped structure, a vertical plate 25 in the middle of the E-shaped structure, and a receiving coil 3.
Detailed Description
The present application is further explained below with reference to the drawings.
The first embodiment is described with reference to fig. 1 and fig. 6-8, and the first embodiment provides a UT-type magnetic core, the magnetic core is composed of two parts, one part is an E-type structure, the other part is a flat plate-type structure 21, the flat plate-type structure 21 is fixed and covered on the top end of a vertical plate 25 in the middle of the E-type structure and is parallel to the bottom surface 24 of the E-type structure, the width of a groove 23 of the E-type structure is L, and the distance between the side edge of the flat plate-type structure 21 and the inner side wall 22 of the groove of the E-type structure is greater than 0.25L.
Wherein L is 70 mm;
the size of the magnetic core can be optimally designed according to magnetic field finite element simulation software;
specifically, the UT-type magnetic core provided by the application is structurally regarded as a combination of a U-type magnetic core and a T-type magnetic core because a flat plate structure is added on the basis of an original E-type magnetic core, so that the UT-type magnetic core is named after the UT-type magnetic core;
referring to fig. 6-8, the E-shaped portion of the core structure has a length of 300mm, a width of 250mm, a height of 70mm, a groove width of 70mm, a groove height of 50mm, a sidewall thickness of 30mm, a middle standing plate width of 50mm, a plate portion length of 450mm, a width of 100mm, and a thickness of 10 mm.
In the second embodiment, referring to fig. 1, the present embodiment is further limited to the UT-type magnetic core provided in the first embodiment, and the flat plate-type structure 21 is: rectangular.
In the third embodiment, the UT-type magnetic core provided in the first embodiment is further limited by the description of the third embodiment with reference to fig. 1, and the thickness of the flat plate-type structure 21 is the same as the thickness of the bottom surface 24 of the E-type structure.
Fourth embodiment, the present embodiment is described with reference to fig. 2 to 5, and the present embodiment provides a wireless power supply system with a rail-type UT-type coupling structure, including: a guide rail; the system comprises: the device comprises a transmitting guide rail 1, a receiving coil 3, a magnetic core 2 and a power supply device; the launching guide rail 1 comprises at least one section, and each section comprises: the two sections of linear wires are parallel to each other, and the connecting wires are connected with a power supply device; the at least one section of the emission guide rail 1 is arranged in a straight line shape; the power supply device is used for supplying power to the launching guide rail 1; the magnetic core 2 is a UT-type magnetic core as claimed in claim 1, the receiving coil 3 is wound on the pillar in the middle of the E-type structure; two straight wires of the emission guide rail 1 respectively pass through the two grooves of the magnetic core 2.
The energy transmitting guide rail 1 and the energy receiving coil 3 are wound by litz wires so as to reduce the proximity effect between the coils and the skin effect of the coils, and the magnetic core 2 is made of ferrite made of PC 95.
The beneficial effects of the embodiment are as follows: the launching guide rail 1 is in a suspension form, and the coupling mechanism can smoothly pass through the node of each section of the launching guide rail 1.
In the fifth embodiment, the present embodiment is described with reference to fig. 2 to 5, and the present embodiment is a further limitation of the wireless power supply system with the rail-type UT-type coupling structure provided in the fourth embodiment, wherein the connection lead is in an arch-shaped structure.
Sixth embodiment, the present embodiment is described with reference to fig. 2 to 5, and the present embodiment is a further limitation of the wireless power supply system with the rail-type UT-type coupling structure provided in the fourth embodiment, wherein the connecting wire is of a zigzag structure, and an included angle of the zigzag structure is less than 120 °.
Seventh embodiment, the present embodiment is described with reference to fig. 2 to 5, and the present embodiment is a further limitation of the wireless power supply system with the rail-type UT-type coupling structure provided in the sixth embodiment, and an included angle of the broken line type is 45 °.
In an eighth embodiment, the present embodiment is described with reference to fig. 2 to 5, and the present embodiment further defines the rail-type UT-type coupling structure wireless power supply system provided in the sixth embodiment, wherein an angle between the two linear wires is 60 °.
Ninth embodiment, the present embodiment is described with reference to fig. 2 to 5, and the present embodiment is a further limitation of the wireless power supply system with rail-type UT-type coupling structure provided in the fourth embodiment, wherein the length of each section of the transmitting rail 1 is 1.25 m.
Tenth embodiment, the present embodiment is described with reference to fig. 2 to 5, and the present embodiment is a further limitation of the wireless power supply system with a rail-type UT-type coupling structure provided in the fourth embodiment, wherein each section of the transmission rail 1 has a length of 1 m.
Eleventh, the present embodiment provides a specific example of the wireless power supply system with a rail-type UT-type coupling structure provided in the present application, and as an explanation of an improvement of the effect of the present application, the specific example is as follows:
when the transmission rail 1 has 2 turns and the reception coil 3 has 6 turns, the comparison between the E-type coupling mechanism and the UT-type coupling mechanism is shown in table 1.
TABLE 1 comparison of coupling mechanism Performance
The parameters of the two types of coupling mechanisms are normalized by taking the corresponding parameters of the E-type coupling mechanism as reference variables, and the comprehensive cost comparison of the two types of coupling mechanisms is carried out, as shown in Table 2.
TABLE 2 comparison of the comprehensive costs of the two types of coupling mechanisms
From table 2, it can be seen that the increase ratio of the UT type coupling mechanism compared to the E type coupling mechanism in both the mutual inductance and the coupling coefficient is larger than the increase ratio in the magnetic core 2, and the increase ratio of the mutual inductance of the UT type coupling mechanism is 1.74, but the mass ratio is only 1.14, which means that the increase ratio of the mutual inductance of the UT type coupling mechanism can reach approximately 1.52 at the same volume. Because the output power and the mutual inductance are in a positive relation, the overall design of the system can be lighter and the characteristics of higher power density can be realized by using the UT type coupling mechanism when the same power is transmitted; in summary, the overall performance of UT-type is greater than that of E-type coupling mechanisms.
The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, combinations, equivalents, and improvements made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (10)
1. The UT-type magnetic core is characterized by comprising two parts, wherein one part is an E-type structure, the other part is a flat plate-type structure (21), the flat plate-type structure (21) is fixed and covers the top end of a vertical plate (25) in the middle of the E-type structure and is parallel to the bottom surface (24) of the E-type structure, the width of a groove (23) of the E-type structure is L, and the distance between the side edge of the flat plate-type structure (21) and the side wall (22) of the groove of the E-type structure is larger than 0.3L.
2. A UT core according to claim 1, characterized in that said plate-like structure (21) is: rectangular.
3. A UT core according to claim 1 characterized in that the thickness of the plate-like structure (21) is the same as the thickness of the bottom surface (24) of the E-shaped structure.
4. Guide tracked UT type coupled structure wireless power supply system includes: a guide rail; characterized in that the system comprises: the device comprises a transmitting guide rail (1), a receiving coil (3), a magnetic core (2) and a power supply device; the launching guide rail (1) comprises at least one section, and each section comprises: the two sections of linear wires are parallel to each other, and the connecting wires are connected with a power supply device; the at least one section of emission guide rail (1) is arranged in a straight line shape; the power supply device is used for supplying power to the launching guide rail (1); the magnetic core (2) is a UT-type magnetic core as claimed in claim 1, the receiving coil (3) is wound on a pillar in the middle of the E-shaped structure; two linear wires of the emission guide rail (1) respectively pass through the two grooves of the magnetic core (2).
5. The wireless power supply system of claim 4, wherein said trace UT-type coupling structure is an arch.
6. The wireless power supply system of claim 4, wherein the connection wire is a zigzag structure, and the included angle of the zigzag is less than 120 °.
7. The wireless power supply system of claim 6, wherein the angle of the fold line is 45 °.
8. The wireless power supply system of claim 6, wherein the angle between the two linear wires is 60 °.
9. The wireless power supply system of claim 4, wherein each section of said transmission rail (1) has a length of 1.25 m.
10. The wireless power supply system of claim 4, wherein each section of said transmission rail (1) has a length of 1 m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111272531.2A CN113991881B (en) | 2021-10-29 | 2021-10-29 | UT type magnetic core and guide tracked UT type coupling structure wireless power supply system |
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| CN202111272531.2A CN113991881B (en) | 2021-10-29 | 2021-10-29 | UT type magnetic core and guide tracked UT type coupling structure wireless power supply system |
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| CN113991881B CN113991881B (en) | 2023-10-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116317196A (en) * | 2023-03-23 | 2023-06-23 | 哈尔滨工业大学 | Embedded magnetic coupling mechanism applied to wireless power supply of automobile seat motor and power supply system thereof |
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