Magnetic coupling structure of high-efficiency and high-power miniaturized charging receiving device

Abstract

The utility model discloses a magnetic coupling structure of a high-efficiency high-power miniaturized charging receiving device, which comprises a charging end and a receiving end, the charging end and the receiving end are respectively provided with a magnetic coupling part formed by a coil and a magnetic core which are close to each other, and when the magnetic coupling parts of the charging end and the receiving end are assembled, the magnetic coupling parts of the charging end and the receiving end are assembled together. Any coil and any magnetic core are arranged in a space surrounded by the other coil, and at least two groups of opposite surfaces of the magnetic core of the charging end and the magnetic core of the receiving end are used as coupling contact surfaces of the charging end and the receiving end to form a shortest magnetic loop. The technical problems that the coupling degree is poor due to the fact that a traditional charger is vertically opposite to a receiver coil and the size is large due to the fact that high-power charging is achieved are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless charging circuits, and in particular to a magnetic coupling structure of a miniaturized charging receiving device with high efficiency and high power. Background Art

[0002] With the upgrading of electronic products and the continuous expansion of battery capacity, the charging power requirements for wireless chargers are constantly increasing. Figure 1 Generally, the charger and receiver coils used for coupling are perpendicular to each other. In order to obtain better coupling effect and achieve greater power, it is necessary to increase the relative area of ​​the charging coil and the receiving coil, which requires a large area for winding. This not only increases the volume of the charger, but also increases the charging loss due to the increase in coil length. Moreover, since the charger and receiver are separated by a shell, the shell will have a certain thickness, so the coupling degree between the charger coil and the receiver coil is generally not high, resulting in low transmission power and low efficiency. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problems that the coupling between the traditional charger and the receiver coil is poor due to being perpendicular to each other and the volume is large due to the high-power charging.

[0004] The utility model provides a magnetic coupling structure of a miniaturized charging receiving device with high efficiency and high power, comprising a charging end and a receiving end, wherein the charging end comprises a first coil and a first magnetic core, and the receiving end comprises a second coil and a second magnetic core. When the charging end and the receiving end are coupled, the first coil and the first magnetic core are surrounded by the second coil; the first magnetic core and the second magnetic core have at least two sets of opposing surfaces serving as coupling contact surfaces between the charging end and the receiving end.

[0005] Preferably, the first magnetic core has two horizontal end surfaces facing the horizontal end surface of the second magnetic core, forming the shortest magnetic loop.

[0006] Another solution is a magnetic coupling structure of a high-efficiency and high-power miniaturized charging receiving device, characterized in that it includes a charging end and a receiving end, the charging end includes a first coil and a first magnetic core, and the receiving end includes a second coil and a second magnetic core. When the charging end and the receiving end are coupled, the second coil and the second magnetic core are surrounded by the first coil; the first magnetic core and the second magnetic core have at least two sets of opposing surfaces as coupling contact surfaces of the charging end and the receiving end.

[0007] Preferably, the first magnetic core has two horizontal end surfaces facing the horizontal end surface of the second magnetic core, forming the shortest magnetic loop.

[0008] Another solution is a magnetic coupling structure of a high-efficiency and high-power miniaturized charging receiving device, including a charging end and a receiving end, the charging end including a first coil and a first magnetic core, the receiving end including a second coil and a second magnetic core, when the charging end and the receiving end are coupled, the first coil and the second magnetic core are surrounded by the second coil; the first magnetic core and the second magnetic core have at least two sets of opposing surfaces serving as coupling contact surfaces of the charging end and the receiving end.

[0009] Preferably, the second magnetic core has at least two horizontal end surfaces facing the horizontal end surfaces of the first magnetic core, forming the shortest magnetic loop.

[0010] Another solution is a magnetic coupling structure of a high-efficiency and high-power miniaturized charging receiving device, including a charging end and a receiving end, the charging end including a first coil and a first magnetic core, the receiving end including a second coil and a second magnetic core, when the charging end and the receiving end are coupled, the second coil and the first magnetic core are surrounded by the first coil; the first magnetic core and the second magnetic core have at least two sets of opposing surfaces serving as coupling contact surfaces of the charging end and the receiving end.

[0011] Preferably, the first magnetic core has at least two horizontal end surfaces facing the horizontal end surfaces of the second magnetic core, forming the shortest magnetic loop.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The utility model discloses a magnetic coupling structure of a miniaturized charging receiving device with high efficiency and high power, comprising a charging end and a receiving end, wherein each of the charging end and the receiving end has a magnetic coupling portion consisting of a coil and a magnetic core close together. When the magnetic coupling portions of the charging end and the receiving end are assembled, any coil and any magnetic core are arranged in a space surrounded by the other coil, and the magnetic core of the charging end and the magnetic core of the receiving end have at least two sets of opposing surfaces serving as coupling contact surfaces of the charging end and the receiving end, thereby forming a shortest magnetic loop. At the same time, any coil and any magnetic core are arranged in a space surrounded by the other coil, i.e., a structure in which one magnetic core is simultaneously in the space surrounded by two coils. The coupling between the two coils is also strengthened due to the presence of the magnetic core therein, thereby improving the magnetic coupling effect.

[0014] This magnetic coupling structure maximizes the magnetic flux or inductance between the charger and receiver coils, while minimizing the leakage inductance between the two coils. This optimal coupling ensures that the charger coupling portion directly transmits voltage to the receiver. Furthermore, low leakage inductance, combined with appropriate circuitry, reduces the output series impedance, thereby improving output power and energy efficiency. The structure, in which two coils simultaneously surround a single magnetic core, allows for a compact magnetic coupling structure, resolving the technical issues of conventional charger and receiver coils, which face poor coupling due to their perpendicular orientation, and the resulting bulk required to achieve high-power charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an existing magnetic coupling structure in the background technology.

[0016] Figure 2 Schematic diagram of embodiment 1 of the magnetic coupling structure of the miniaturized charging receiving device with high efficiency and high power of the present invention.

[0017] Figure 3 It is a schematic diagram of embodiment 2 of the magnetic coupling structure of the miniaturized charging receiving device with high efficiency and high power of the utility model.

[0018] Figure 4 Schematic diagram of embodiment 3 of the magnetic coupling structure of the miniaturized charging receiving device with high efficiency and high power of the present invention.

[0019] Figure 5 It is a schematic diagram of embodiment 4 of the magnetic coupling structure of the high-efficiency and high-power miniaturized charging receiving device of the present invention.

[0020] Figure identification: 1-charging end; 11-first coil; 12-first magnetic core; 2-receiving end; 21-first coil; 22-second magnetic core. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] Please see the attached Figure 2A magnetic coupling structure for a high-efficiency, high-power, miniaturized charging receiver includes a charging terminal 1 and a receiving terminal 2. The charging terminal 1 includes a first coil 11 and a first magnetic core 12, and the receiving terminal 2 includes a second coil 21 and a second magnetic core 22. When the charging terminal 1 and the receiving terminal 2 are coupled, the first coil 11 and the first magnetic core 12 are surrounded by the second coil 21. The first magnetic core 12 and the second magnetic core 22 each have at least two surfaces close to the coupling contact surface formed by the charging terminal 1 and the receiving terminal 2. The first magnetic core 12 has two horizontal end surfaces that face the horizontal end surfaces of the second magnetic core 22, forming the shortest magnetic loop.

[0024] Furthermore, the first magnetic core 12 of the charging terminal 1 is in an inverted T-shape, and the second magnetic core 22 of the receiving terminal 2 is in an inverted U-shape. When the charging terminal 1 and the receiving terminal 2 are coupled, the vertical section of the first magnetic core 12 is inserted into the groove of the second magnetic core 22. The vertical section of the first magnetic core 12 and the first coil 11 adjacent to the first magnetic core 12 are surrounded by the second coil 21, enhancing the magnetic coupling effect. The end surface of the vertical section of the inverted T-shaped first magnetic core 12 and the horizontal surface of the base are respectively aligned with the horizontal surface of the top and the end surface of the vertical section of the inverted U-shaped second magnetic core 22, achieving the shortest magnetic loop. This magnetic coupling structure maximizes the magnetic flux or inductance between the charger coil and the receiver coil, while minimizing the leakage inductance between the two coils. The optimal coupling effect allows the charger coupling portion to directly transmit voltage to the receiving terminal. The low leakage inductance, combined with appropriate circuitry, can reduce the output series impedance, thereby improving output power and energy efficiency. The nested structure enhances coupling while miniaturizing the device.

[0025] Example 2

[0026] Please see the attached Figure 3 A magnetic coupling structure for a high-efficiency, high-power, miniaturized charging receiver includes a charging terminal 1 and a receiving terminal 2. The charging terminal 1 includes a first coil 11 and a first magnetic core 12, and the receiving terminal 2 includes a second coil 21 and a second magnetic core 22. When the charging terminal 1 and the receiving terminal 2 are coupled, the second coil 21 and the second magnetic core 22 are surrounded by the first coil 11. The first magnetic core 12 and the second magnetic core 22 each have at least two surfaces close to the coupling contact surface formed by the charging terminal 1 and the receiving terminal 2. The first magnetic core 12 has two horizontal end surfaces that face the horizontal end surfaces of the second magnetic core 22, forming the shortest magnetic loop.

[0027] Furthermore, the first magnetic core 12 of the charging terminal 1 is a positive U-shape, and the second magnetic core 22 of the receiving terminal 2 is a positive T-shape. When the charging terminal 1 and the receiving terminal 2 are coupled, the vertical section of the second magnetic core 22 is inserted into the groove of the first magnetic core 12. The vertical section of the second magnetic core 22 and the second coil 21 adjacent to the second magnetic core 22 are surrounded by the first coil 11, enhancing the magnetic coupling effect. The end surface of the vertical section of the positive U-shaped first magnetic core 12 and the horizontal surface of the base are respectively aligned with the horizontal surface of the top and the end surface of the vertical section of the positive T-shaped second magnetic core 22, achieving the shortest magnetic loop. This magnetic coupling structure maximizes the magnetic flux or inductance between the charger coil and the receiver coil, while minimizing the leakage inductance between the two coils. The optimal coupling effect allows the charger coupling portion to directly transmit voltage to the receiving terminal. The low leakage inductance, combined with appropriate circuitry, can reduce the output series impedance, thereby improving output power and energy efficiency. The nested structure enhances coupling while miniaturizing the device.

[0028] Example 3

[0029] Please see the attached Figure 4 A magnetic coupling structure of a high-efficiency and high-power miniaturized charging receiving device includes a charging end 1 and a receiving end 2. The charging end 1 includes a first coil 11 and a first magnetic core 12, and the receiving end 2 includes a second coil 21 and a second magnetic core 22. When the charging end 1 and the receiving end 2 are coupled, the first coil 11 and the second magnetic core 22 are surrounded by the second coil 21; the first magnetic core 12 and the second magnetic core 22 have at least two sets of opposing surfaces as coupling contact surfaces of the charging end 1 and the receiving end 2.

[0030] Furthermore, the first magnetic core 12 of the charging end 1 is of an "I" type, and the first coil 11 is arranged in a vertical section perpendicular to the first magnetic core 12, and the second magnetic core 22 of the receiving end 2 is of an "E" type with an opening downward. When the charging end 1 and the receiving end 2 are combined for coupling, the vertical section of the first coil 11 is inserted into the two downward-opening grooves of the second magnetic core 22, and the middle vertical section of the second magnetic core 22 and the vertical first coil 11 arranged perpendicular to the first magnetic core 12 are surrounded by the second coils 21 arranged at both ends of the E"-shaped second magnetic core 22 with an opening downward, thereby improving the magnetic coupling effect.

[0031] The vertical section of the downward-opening E-shaped second magnetic core 22 has three horizontal end surfaces that face the horizontal surface of the first magnetic core 12, achieving the shortest magnetic loop. This magnetic coupling structure maximizes the magnetic flux or inductance between the charger coil and the receiver coil, while minimizing the leakage inductance between the two coils. The optimal coupling effect allows the charger coupling portion to directly transmit voltage to the receiving end. Low leakage inductance combined with appropriate circuitry can reduce the output series impedance, thereby improving output power and energy efficiency. The nested structure enhances coupling while miniaturizing the device.

[0032] Example 4

[0033] Please see the attached Figure 5 A magnetic coupling structure of a high-efficiency and high-power miniaturized charging receiving device includes a charging end 1 and a receiving end 2. The charging end 1 includes a first coil 11 and a first magnetic core 12, and the receiving end 2 includes a second coil 21 and a second magnetic core 22. When the charging end 1 and the receiving end 2 are coupled, the first magnetic core 12 and the second coil 21 are surrounded by the first coil 11; the first magnetic core 12 and the second magnetic core 22 have at least two sets of opposing surfaces as coupling contact surfaces of the charging end 1 and the receiving end 2.

[0034] Furthermore, the first magnetic core 12 of the charging end 1 is an "E" type with an opening upward, the second magnetic core 22 of the receiving end 2 is an "I" type, and the second coil 21 is arranged in a vertical section perpendicular to the second magnetic core 22. When the charging end 1 and the receiving end 2 are combined for coupling, the vertical section of the second coil 21 is inserted into the two grooves of the first magnetic core 12 with an opening upward. The middle vertical section of the first magnetic core 12 and the vertical second coil 21 arranged perpendicular to the second magnetic core 22 are surrounded by the first coil 11 arranged at both ends of the E"-shaped first magnetic core 12 with an opening upward, thereby improving the magnetic coupling effect.

[0035] The vertical section of the upward-opening E-shaped first magnetic core 12 has three horizontal end surfaces that face the horizontal surface of the second magnetic core 22, achieving the shortest magnetic loop. This magnetic coupling structure maximizes the magnetic flux or inductance between the charger coil and the receiver coil, while minimizing the leakage inductance between the two coils. The optimal coupling effect allows the charger coupling portion to directly transmit voltage to the receiving end. The low leakage inductance combined with appropriate circuitry can reduce the output series impedance, thereby improving output power and energy efficiency. The nested structure enhances coupling while miniaturizing the device.

[0036] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention is disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the profession can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to the technical contents disclosed above into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention without departing from the content of the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A magnetic coupling structure of a miniaturized charging receiving device with high efficiency and high power, characterized in that: The invention comprises a charging end (1) and a receiving end (2), wherein the charging end (1) comprises a first coil (11) and a first magnetic core (12), and the receiving end (2) comprises a second coil (21) and a second magnetic core (22). When the charging end (1) and the receiving end (2) are coupled, the first coil (11) and the first magnetic core (12) are surrounded by the second coil (21); and the first magnetic core (12) and the second magnetic core (22) have at least two sets of opposite surfaces serving as coupling contact surfaces of the charging end (1) and the receiving end (2).

2. The magnetic coupling structure of the high-efficiency and high-power miniaturized charging receiving device according to claim 1, characterized in that: The first magnetic core (12) has two horizontal end surfaces that are opposite to the horizontal end surface of the second magnetic core (22), forming the shortest magnetic loop.

3. A magnetic coupling structure of a miniaturized charging receiving device with high efficiency and high power, characterized in that: The invention comprises a charging end (1) and a receiving end (2), wherein the charging end (1) comprises a first coil (11) and a first magnetic core (12), and the receiving end (2) comprises a second coil (21) and a second magnetic core (22). When the charging end (1) and the receiving end (2) are coupled, the second coil (21) and the second magnetic core (22) are surrounded by the first coil (11); and the first magnetic core (12) and the second magnetic core (22) have at least two sets of opposite surfaces serving as coupling contact surfaces of the charging end (1) and the receiving end (2).

4. The magnetic coupling structure of the high-efficiency and high-power miniaturized charging receiving device according to claim 3, characterized in that: The first magnetic core (12) has two horizontal end surfaces that are opposite to the horizontal end surface of the second magnetic core (22), forming the shortest magnetic loop.

5. A magnetic coupling structure of a miniaturized charging receiving device with high efficiency and high power, characterized in that: The invention comprises a charging end (1) and a receiving end (2), wherein the charging end (1) comprises a first coil (11) and a first magnetic core (12), and the receiving end (2) comprises a second coil (21) and a second magnetic core (22). When the charging end (1) and the receiving end (2) are coupled, the first coil (11) and the second magnetic core (22) are surrounded by the second coil (21); and the first magnetic core (12) and the second magnetic core (22) have at least two sets of opposite surfaces serving as coupling contact surfaces of the charging end (1) and the receiving end (2).

6. The magnetic coupling structure of the high-efficiency and high-power miniaturized charging receiving device according to claim 5, characterized in that: The second magnetic core (22) has at least two horizontal end surfaces that are opposite to the horizontal end surfaces of the first magnetic core (12), forming the shortest magnetic loop.

7. A magnetic coupling structure of a miniaturized charging receiving device with high efficiency and high power, characterized in that: The invention comprises a charging end (1) and a receiving end (2), wherein the charging end (1) comprises a first coil (11) and a first magnetic core (12), and the receiving end (2) comprises a second coil (21) and a second magnetic core (22). When the charging end (1) and the receiving end (2) are coupled, the second coil (21) and the first magnetic core (12) are surrounded by the first coil (11); and the first magnetic core (12) and the second magnetic core (22) have at least two sets of opposite surfaces serving as coupling contact surfaces of the charging end (1) and the receiving end (2).

8. The magnetic coupling structure of the high-efficiency and high-power miniaturized charging receiving device according to claim 7, characterized in that: The first magnetic core (12) has at least two horizontal end surfaces that are opposite to the horizontal end surfaces of the second magnetic core (22), forming the shortest magnetic loop.

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