CN111584220B - High-power wireless charging magnetic coupling mechanism and electric energy transmission system thereof - Google Patents
High-power wireless charging magnetic coupling mechanism and electric energy transmission system thereof Download PDFInfo
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- CN111584220B CN111584220B CN202010420767.5A CN202010420767A CN111584220B CN 111584220 B CN111584220 B CN 111584220B CN 202010420767 A CN202010420767 A CN 202010420767A CN 111584220 B CN111584220 B CN 111584220B
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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
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
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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
- H01F27/28—Coils; Windings; Conductive connections
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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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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Abstract
The invention discloses a high-power wireless charging magnetic coupling mechanism and an electric energy transmission system thereof, and belongs to the field of wireless charging. The magnetic coupling mechanism comprises a primary side mechanism and a secondary side mechanism, and the primary side mechanism and the secondary side mechanism are completely symmetrical. The primary side mechanism is provided with an aluminum shell heat dissipation cover, a fan, a heat dissipation component, a magnetic core component, an insulation board component, a coil layer, a silica gel layer and an insulation pressing board from bottom to top in sequence, and power exceeding hundreds of kilowatts is wirelessly transmitted between the primary side mechanism and the secondary side mechanism. The wireless charging magnetic coupling mechanism is applied to a high-energy-density transmission scene, the primary side mechanism and the secondary side mechanism can still keep a high coupling coefficient level at a long distance, energy loss in the wireless charging process is reduced, and meanwhile, the wireless charging magnetic coupling mechanism has excellent heat dissipation performance and magnetic shielding performance, and light weight of high-power wireless charging is realized.
Description
Technical Field
The invention belongs to the technical field of wireless charging, and particularly relates to a high-power wireless charging magnetic coupling mechanism and an electric energy transmission system thereof.
Background
Electromagnetic induction type wireless charging has been widely and mature applied in electric vehicles, but the power is only kilowatt level at present. Aiming at a high-power wireless charging system with power exceeding hundreds of kilowatts, a wireless charging magnetic coupling mechanism is required to have higher power density, a compact and simple structure and higher requirement on system stability, and meanwhile, the requirement on magnetic shielding is also higher in order to reduce magnetic leakage.
At present, the magnetic coupling mechanism that high-power wireless charges adopts the plate structure more, adopt the way of circular coil back laminating a monoblock plane magnetic core promptly, this kind of structure mode simple structure, transmission efficiency and anti skew characteristic are better, but because it does not have make full use of coupling mechanism's height, strengthen coupling mechanism direction of height's magnetic field, lead to coupling mechanism though can accomplish thinly, but its area is too big, power density is lower, the loss is great, the magnetic shielding effect is relatively poor, the heat dissipation problem of magnetic coupling mechanism also does not considered mostly simultaneously. Therefore, the existing high-power wireless charging magnetic coupling mechanism needs to be improved in structure.
Disclosure of Invention
In view of the above drawbacks and needs of the prior art, the present invention provides a high power wireless charging magnetic coupling mechanism and a power transmission system thereof, and aims to provide a magnetic coupling mechanism suitable for high power wireless charging with power exceeding hundreds of kilowatts.
To achieve the above object, according to one aspect of the present invention, there is provided a high power wireless charging magnetic coupling mechanism, including: the primary side mechanism and the secondary side mechanism are symmetrically distributed; the primary side mechanism comprises a radiator assembly, a magnetic core assembly, an insulating plate assembly, a coil layer, a silica gel layer and an insulating pressing plate which are sequentially distributed from bottom to top;
the radiator component is provided with a groove, and the magnetic core component is embedded in the groove; the insulating board assembly is fixed between the magnetic core assembly layer and the coil layer to realize electrical insulation; the silica gel layer is arranged between the coil layer and the insulating pressing plate and used for insulation and heat dissipation; the insulating pressing plate is used for preventing dust and water;
the magnetic core assembly is of a layered structure, is formed by stacking standard cuboid ferrite magnetic cores, is arranged in the direction of a magnetic induction curve, and is provided with different thicknesses according to the magnetic field intensity of different positions of the coil layer; the coil layer is wound by litz wires and is formed by vertically stacking two oval wire coils with splayed structures; alternating current is formed in the coil layer to carry out wireless power transmission.
Further, the magnetic core assembly is of a three-layer structure; the lowest layer and the middle layer are of complete cubic structures; the thickness of the lowest layer is the largest, and the thickness of the middle layer is the smallest; the width of the middle layer is larger than that of the lowest layer; the uppermost layer is composed of two small cubic bosses which are respectively arranged at the position where the magnetic field of the coil layer is strongest.
Furthermore, the insulating plate assembly is made of epoxy resin materials, through holes are formed in the positions, corresponding to the two cubic bosses in the magnetic core assembly, of the insulating plate assembly, and the insulating plate assembly is completely attached to the magnetic core assembly.
Further, the mechanism further comprises: an aluminum shell heat dissipation cover and a fan;
the fans are embedded in the radiator assembly and used for discharging heat in the mechanism;
the aluminum shell heat dissipation cover completely wraps the plurality of fans and the radiator assembly and is used for fixing, mechanical protection and magnetic shielding of the mechanism.
Furthermore, the back of the radiator component is provided with an inserting piece, so that heat can be conveniently discharged; the side surface is provided with a screw hole for fixing the fan and the aluminum shell heat dissipation cover.
Further, the insulating pressing plate is made of epoxy resin materials.
According to another aspect of the present invention, an electric energy transmission system of a high-power wireless charging magnetic coupling mechanism is provided, which includes the high-power wireless charging magnetic coupling mechanism, a dc power supply, a high-frequency inverter, a primary side mechanism compensation capacitor, a secondary side mechanism compensation capacitor, a high-frequency rectifier and a load;
the direct current power supply is connected with one end of the high-frequency inverter and used for providing high-power electric energy; the other end of the high-frequency inverter is connected with the primary structure compensation capacitor, and converts direct-current voltage provided by the direct-current power supply into high-frequency alternating-current voltage;
under the action of high-frequency alternating voltage, the secondary side mechanism coil and the primary side mechanism coil are magnetically coupled to generate induced current, so that wireless electric energy transmission is realized; the primary side mechanism compensation capacitor and the secondary side mechanism are used for stabilizing the output power of the system;
the high-frequency rectifier is connected with the secondary side mechanism, converts high-frequency alternating current into direct current and outputs the direct current to a load, and hundred-kilowatt power output is realized.
In general, the above technical solutions contemplated by the present invention can achieve the following advantageous effects compared to the prior art.
(1) The magnetic core assembly adopts a layered structure, different thicknesses are set according to the magnetic field intensity of different positions of the coil layer, and the magnetic core assembly is arranged according to the magnetic induction curve direction, so that the magnetic core assembly can play a good constraint role in the magnetic field when transmitting hundred kilowatts, the optimal coupling coefficient is realized, the use number of the cuboid ferrite magnetic cores is reduced, the cost is saved, the magnetic saturation of the ferrite magnetic cores is prevented, the magnetic core loss is reduced, and the energy density of a magnetic coupling mechanism is improved; in addition, the magnetic core component adopts a layered structure, so that the surface area of the magnetic core component layer is increased, the heat generated by the high-power magnetic coupling mechanism is rapidly discharged, the heat dissipation pressure is reduced, the volume of the magnetic coupling mechanism is reduced, and the light weight and the integrated design of the magnetic coupling mechanism are favorably realized.
(2) The coil layer is wound by litz wires and formed by stacking two layers of oval wire coils in a splayed structure up and down, hundreds of kilowatt of power can flow in the coil, the volume of the coil is reduced, the self-inductance of the coil can be increased by the stacked coil structure, the loss of the coil is reduced, and the efficiency of a magnetic coupling mechanism is improved.
(3) The radiator assembly is provided with the grooves to be embedded into the magnetic core assembly, so that the maximum radiating contact area is ensured, and the heat conduction efficiency of the magnetic core assembly and the coil layer is improved; and meanwhile, the magnetic core and the coil are wrapped, so that the radiation of a magnetic field is shielded, and the influence of the magnetic field of the surrounding environment on electric energy transmission is reduced.
Drawings
Fig. 1 is a three-dimensional structure diagram of a primary side mechanism/a secondary side mechanism of a high-power wireless charging magnetic coupling mechanism provided by the invention;
FIG. 2 is a front view of a three-layer structure of a magnetic core assembly of a high-power wireless charging magnetic coupling mechanism provided by the invention;
FIG. 3 is a top view of a three-layer structure of a magnetic core assembly of a high-power wireless charging magnetic coupling mechanism provided by the present invention;
FIG. 4 is a schematic diagram of a coil layer of a high-power wireless charging magnetic coupling mechanism provided by the present invention;
FIG. 5 is a schematic view of a high power wireless charging magnetic coupling mechanism heat sink assembly provided by the present invention;
FIG. 6 is a schematic diagram of the magnetic field distribution of the high-power wireless charging magnetic coupling mechanism provided by the invention;
FIG. 7 is a schematic diagram of the variation of the coupling coefficient of the high-power wireless charging magnetic coupling mechanism provided by the invention with the transmission distance;
FIG. 8 is a schematic diagram of a power transmission system of a high-power wireless charging magnetic coupling mechanism provided by the present invention;
FIG. 9 is a schematic view of a current waveform when the high-power wireless charging magnetic coupling mechanism provided by the present invention transmits hundreds of kilowatts;
the parts in the drawings are numbered as follows: 1-a radiator component, 2-a magnetic core component, 3-an insulating board component, 4-a coil layer, 5-a silica gel layer, 6-an insulating pressing plate, 7-an aluminum shell heat dissipation cover and 8-a fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, an embodiment of the present invention provides a high-power wireless charging magnetic coupling mechanism, including: the primary side mechanism and the secondary side mechanism are symmetrically distributed; the primary side mechanism comprises a radiator component 1, a magnetic core component 2, an insulating plate component 3, a coil layer 4, a silica gel layer 5 and an insulating pressing plate 6 which are sequentially distributed from bottom to top;
the heat radiator component 1 is provided with a groove, the magnetic core component 2 is embedded in the groove to ensure the maximum heat radiation contact area, and the back surface of the heat radiator component is provided with an inserting piece to facilitate heat discharge; the insulating plate component 3 is fixed between the magnetic core component 2 and the coil layer 4 to realize electrical insulation; the silica gel layer 5 is arranged between the coil layer 4 and the insulating pressing plate 6 and used for insulation and heat dissipation; the insulating pressing plate 6 is made of epoxy resin materials and is used for dust prevention and water prevention;
the magnetic core assembly is formed by stacking standard cuboid ferrite magnetic cores, is arranged in the direction of a magnetic induction curve, and is provided with different thicknesses according to the magnetic field intensity of different positions of the coil layer; the coil layer is wound by litz wires and is formed by vertically stacking two oval wire coils with splayed structures; alternating current is formed in the coil layer to carry out wireless power transmission.
Specifically, the magnetic core assembly is arranged into a three-layer structure; as shown in fig. 2 and 3, the lowest layer and the middle layer are in a complete cubic structure; the thickness of the lowest layer is the largest, and the thickness of the middle layer is the smallest; the width of the middle layer is larger than that of the lowest layer; the uppermost layer is composed of two small cubic bosses which are respectively arranged at the position where the magnetic field of the coil layer is strongest. The magnetic core assembly of the embodiment of the invention has the advantages that the length is 560mm, the width is 460mm, the total height is 108mm, the length of the magnetic core cube at the lowermost layer is narrower, the length is 336mm, the width is 460mm, and the height is 48 mm; the middle layer magnetic core cube is wider in length, 560mm in length, 460mm in width and 24mm in height; the magnetic core cube at the uppermost layer is formed by placing two small cuboid blocks on the magnetic core at the middle layer in a left-right mode, and each cuboid block is 231mm in length, 56mm in width and 36mm in height. The cube is formed by splicing cuboid ferrite cores and can transmit hundreds of kilowatts. The magnetic core components are arranged in the direction of a magnetic induction curve, and the magnetic field in the middle of the splayed coil is strongest, so that the thickest magnetic core constraint magnetic field is placed in the middle of the coil at the corresponding position, namely, the uppermost magnetic core constraint magnetic field is set, the magnetic saturation of the ferrite magnetic core is prevented, and fewer magnetic core constraint magnetic fields are only needed to be used on two sides of the coil, so that the magnetic leakage is reduced. The three-layer structure magnetic core assembly can effectively reduce the using number of the cuboid ferrite magnetic cores, simultaneously optimize the coupling coefficient, and greatly reduce the influence of the deviation of the magnetic coupling mechanism on the coupling coefficient. In addition, the surface area of the magnetic core assembly is effectively increased by using the three-layer structure, and the rapid heat discharge generated by the high-power wireless charging magnetic coupling mechanism is facilitated. The core thickness affects the maximum magnetic induction in the core, while the core losses are related to the maximum magnetic induction in the core, which will increase dramatically when the core is saturated. Therefore, the invention prevents the magnetic core from saturation by optimizing the thickness of the magnetic core, effectively reduces the loss of the magnetic core, improves the energy density of the magnetic coupling mechanism, lightens the pressure for heat dissipation, reduces the volume of the radiator assembly, reduces the weight of the magnetic coupling mechanism and lightens the weight of the magnetic coupling mechanism.
Further, the insulating plate assembly 3 is made of epoxy resin materials, through holes are formed in the positions, corresponding to the two cubic bosses in the magnetic core assembly, of the insulating plate assembly, and the insulating plate assembly is completely attached to the magnetic core assembly.
As shown in fig. 4, the coil layer 4 is formed by winding litz wire into an elliptical coil having a splayed structure, and stacking the two coils one on another. The wire coil on the left is wound clockwise from the middle, and the wire coil connected to the right after going to the outer layer is wound counterclockwise from the outside to the inside and is led out from the middle. The coil conducting wire of the coil layer is made of litz wires, the coil current and the current density of the coil are determined according to the rated power of the high-power wireless charging system, the number of strands of the litz wires is determined to be 5000, the alternating current impedance of the coil under high frequency can be reduced, the coil loss under the high-frequency state is reduced, and the quality factor of the coil is improved. The thickness of the coil layer was 10 mm. The number of turns of the coil is set to be 10, the number of turns ensures the self-inductance value of the coil, meanwhile, the coupling coefficient between the coils is increased, the output power of the coil is improved, the cost is saved, the size of the magnetic coupling mechanism is optimized, meanwhile, the number of turns is less, the situation that the voltage at two ends of the coil is not too high can be ensured, the insulation level of the coil is in a reasonable range, and a certain gap is reserved between every two turns of the coil. Compared with a rectangular coil, the elliptical coil has the advantages that the coupling coefficient is guaranteed, the length of the coil is reduced, the cost is saved, and meanwhile, the processing is convenient. For the elliptical coil, the length-width ratio of the coil is optimized, and the magnetic core assembly with the three-layer structure is combined, so that the coupling coefficient is optimized, and more energy can be transmitted in two magnetic pole directions of the coil. Meanwhile, the coil structure overlapped up and down increases the self-inductance of the coil, reduces the loss of the coil and improves the efficiency of the magnetic coupling mechanism; and the current in the coil can be averaged, the coupling coefficient is increased, and the volume of the coil is reduced.
Further, the above mechanism further comprises: an aluminum shell heat dissipation cover 7 and a fan 8; the fans are embedded in the radiator assembly and used for discharging heat in the mechanism; the aluminum shell heat dissipation cover completely wraps the plurality of fans and the radiator assembly and is used for fixing, mechanical protection and magnetic shielding of the mechanism.
As shown in fig. 5, the heat sink assembly 1 embeds the magnetic core assembly 2 therein, so as to ensure the maximum heat dissipation contact area, and at the same time, wrap the magnetic core and the coil, shield the magnetic field radiation, and reduce the magnetic field influence of the surrounding environment; the side of the radiator component is provided with a groove so that the coil outgoing line penetrates out, the back of the radiator component is provided with an inserting piece, the heat dissipation surface area is increased, the heat dissipation efficiency is improved, and the side of the radiator component is provided with a screw hole for fixing a fan and an aluminum shell heat dissipation cover.
The current is introduced from one end of the oval coil on the left side of the coil layer and flows out from the oval coil on the right side of the other end, and the magnetic field distribution is shown in fig. 6 when the magnetic coupling mechanism transmits hundreds of kilowatts. The current is alternating current, the frequency is 20kHz, the transmission distance between the primary side structure and the secondary side structure is 50mm, and the working environment of the magnetic coupling mechanism is air. The magnetic field distribution of the magnetic coupling mechanism is bilaterally symmetrical about the magnetic coupling mechanism, wherein the position with the largest magnetic induction intensity is positioned inside the magnetic core, and the highest magnetic induction intensity in the magnetic core is 400mT, and the magnetic core is not saturated, as can be seen from FIG. 6. The high-power wireless charging needs to consider the magnetic field leakage of the magnetic coupling mechanism due to the fact that the magnetic field intensity is large. The magnetic coupling mechanism structure has good magnetic shielding performance and small magnetic field radiation, can well protect electronic elements in the wireless charging device, and reduces magnetic field interference to the surrounding environment.
Fig. 7 is a schematic diagram of the variation relationship of the coupling coefficient of the high-power wireless charging magnetic coupling mechanism provided by the invention along with the transmission distance. As shown in fig. 7, as the transmission distance increases, the coupling coefficient of the wireless charging magnetic coupling mechanism of the present invention decreases slowly, until the transmission distance of the magnetic coupling mechanism exceeds 100mm, and the coil coupling coefficient is still greater than 0.5. For the offset characteristics of the magnetic coupling mechanism, the influence of the offset of the short side in the radial direction of the magnetic coupling mechanism with respect to the offset of the long side on the coupling coefficient is small. The wireless charging magnetic coupling mechanism has good offset characteristics, and when coil offset exists, the coupling coefficient does not drop off along a cliff.
As shown in fig. 8, the present invention further provides a power transmission system of a high-power wireless charging magnetic coupling mechanism; besides the high-power wireless charging magnetic coupling mechanism, the wireless charging magnetic coupling mechanism also comprises a direct-current power supply, a high-frequency inverter, a compensation capacitor, a high-frequency rectifier and a load; the direct current power supply provides hundreds of kilowatts of power electric energy; the high-frequency inverter converts direct-current voltage provided by the direct-current power supply into high-frequency alternating-current voltage; the output of the middle point of one bridge arm of the high-frequency inverter is connected with a compensation capacitor, the compensation capacitor is connected with the high-power magnetic coupling mechanism in series, and then the output of the other coil of the high-power magnetic coupling mechanism is connected with the middle point of the other bridge arm of the inverter to form a resonant circuit. The compensation capacitor reduces the consumption of reactive power of a system, balances the influence of inductive reactance in a circuit, further compensates the influence caused by the misalignment of the magnetic coupling mechanism, and avoids the phenomenon that the coupling coefficient is reduced too fast to generate approximately constant power output; the alternating current is output from the high-frequency inverter and is connected to a primary side magnetic coupling mechanism coil, and the secondary side magnetic coupling mechanism coil and the primary side mechanism coil are magnetically coupled to generate induced current so as to realize wireless electric energy transmission; the high-frequency induced current output by the secondary magnetic coupling mechanism is converted into direct current through the secondary mechanism high-frequency rectifier and finally output to a load, and hundred kilowatt power output is realized. The high-power wireless electric energy transmission system is high in reliability, efficiency and power density.
Fig. 9 is a schematic view of a current waveform when the high-power wireless charging magnetic coupling mechanism provided by the invention transmits hundreds of kilowatts. As shown in fig. 9, the primary side mechanism is connected to the output of the full-bridge inverter, the secondary side mechanism is connected to the output of the full-bridge rectifier, the inverter operates at a resonant frequency of 20kHz, the interval between the primary side mechanism and the secondary side mechanism is 70mm, and when no lateral deviation exists, the waveform of the steady-state operation is obtained. The first channel CH1 is the output midpoint voltage of the inverter of the primary mechanism, the second channel CH2 is the input voltage of the rectifier bridge of the secondary mechanism, and the third channel CH3 is the current flowing through the coil of the primary mechanism. At the moment, the output power of the magnetic coupling mechanism is 105kw, and the designed high-power wireless power transmission system can reliably and stably output the preset design power through experimental waveforms, so that the designed coupling mechanism is verified to have good performance.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A high-power wireless charging magnetic coupling mechanism is characterized by comprising: the primary side mechanism and the secondary side mechanism are symmetrically distributed; the primary side mechanism comprises a radiator component (1), a magnetic core component (2), an insulating plate component (3), a coil layer (4), a silica gel layer (5) and an insulating pressing plate (6) which are sequentially distributed from bottom to top;
the radiator component (1) is provided with a groove, and the magnetic core component (2) is embedded in the groove; the insulating board component (3) is fixed between the magnetic core component layer and the coil layer (4) to realize electrical insulation; the silica gel layer (5) is arranged between the coil layer (4) and the insulating pressing plate (6) and is used for insulation and heat dissipation; the insulating pressing plate (6) is used for preventing dust and water;
the magnetic core assembly (2) is of a layered structure, is formed by stacking standard cuboid ferrite magnetic cores, is arranged in the direction of a magnetic induction curve, and is provided with different thicknesses according to the magnetic field intensity of different positions of a coil layer; the coil layer (4) is wound by litz wires and is formed by vertically stacking two oval wire coils with splayed structures; alternating current is formed in the coil layer (4) to carry out wireless power transmission; the magnetic core component (2) is of a three-layer structure; the lowest layer and the middle layer are of complete cubic structures; the thickness of the lowest layer is the largest, and the thickness of the middle layer is the smallest; the width of the middle layer is larger than that of the lowest layer; the uppermost layer is composed of two small cubic bosses which are respectively arranged at the position where the magnetic field of the coil layer is strongest.
2. A high-power wireless charging magnetic coupling mechanism according to claim 1, wherein the insulating plate assembly (3) is made of epoxy resin, and through holes are provided at positions corresponding to the two cubic bosses in the magnetic core assembly, so that the insulating plate assembly and the magnetic core assembly are completely attached.
3. A high power wireless charging magnetic coupling mechanism according to claim 1 or 2, further comprising: an aluminum shell heat dissipation cover (7) and a fan (8);
the fans are embedded in the radiator assembly and used for discharging heat in the mechanism;
the aluminum shell heat dissipation cover completely wraps the plurality of fans and the radiator assembly and is used for fixing, mechanical protection and magnetic shielding of the mechanism.
4. A high-power wireless charging magnetic coupling mechanism according to claim 1 or 2, characterized in that the back of the heat sink assembly (1) is provided with an insert for facilitating heat dissipation; the side surface is provided with a screw hole for fixing the fan (8) and the aluminum shell heat dissipation cover (7).
5. A high-power wireless charging magnetic coupling mechanism according to claim 1, characterized in that the insulating pressing plate (6) is made of epoxy resin material.
6. An electric energy transmission system of a high-power wireless charging magnetic coupling mechanism is characterized by comprising the high-power wireless charging magnetic coupling mechanism, a direct-current power supply, a high-frequency inverter, a primary side mechanism compensation capacitor, a secondary side mechanism compensation capacitor, a high-frequency rectifier and a load according to any one of claims 1 to 5;
the direct current power supply is connected with one end of the high-frequency inverter and used for providing high-power electric energy; the other end of the high-frequency inverter is connected with the primary structure compensation capacitor, and converts direct-current voltage provided by the direct-current power supply into high-frequency alternating-current voltage;
under the action of high-frequency alternating voltage, the secondary side mechanism coil and the primary side mechanism coil are magnetically coupled to generate induced current, so that wireless electric energy transmission is realized; the primary side mechanism compensation capacitor and the secondary side mechanism are used for stabilizing the output power of the system;
the high-frequency rectifier is connected with the secondary side mechanism, converts high-frequency alternating current into direct current and outputs the direct current to a load, and hundred-kilowatt power output is realized.
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| CN113871159B (en) * | 2021-11-05 | 2023-11-03 | 合肥工业大学 | Magnetic coupling structure based on ferrite core modularized design |
| CN115379722A (en) * | 2022-07-21 | 2022-11-22 | 广西电网有限责任公司电力科学研究院 | Water-cooled wireless energy pickup device |
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| CN106560905B (en) * | 2016-05-09 | 2019-07-19 | 中兴新能源汽车有限责任公司 | Wireless charging loosely coupled transformer and automobile wireless charging unit |
| CN107425610B (en) * | 2017-05-10 | 2023-07-04 | 北京交通大学长三角研究院 | Wireless power transmission system for load compensation of parallel energy system and control method |
| CN208316418U (en) * | 2018-07-03 | 2019-01-01 | 浙江中创天成科技有限公司 | A kind of wireless charging LCC compensation circuit and its radiator structure |
| CN110014911B (en) * | 2019-05-23 | 2023-10-13 | 合肥有感科技有限责任公司 | Wireless charging ground lock with heat radiation structure |
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