Magnetic integrated structure, composite sensor and power supply equipment
Through the magnetic integrated structure, the current transformer and resonant inductor share space, which solves the problem of low space utilization caused by the independent design of the current transformer and resonant inductor, achieves high power density and effective heat dissipation, and reduces production and process costs.
Patent Information
- Application Number
- CN202421449048.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-06-24
AI Technical Summary
In the prior art, the independent design of current transformers and resonant inductors leads to low space utilization, affecting the design and specifications of other modules, increasing the structural size and increasing the system design cost.
Using a magnetic integrated structure, the primary side of the current transformer is arranged in the magnetic core assembly, and the electromagnetic wire is wound on the magnetic core assembly to form a resonant inductor, and is wound on the primary side of the current transformer to form the primary winding of the current transformer. The series connection characteristics of the resonant inductor and the primary side of the current transformer are used to reduce the electrical connection points and realize the common space between the current transformer and the resonant inductor.
It effectively saves the primary coil of the current transformer, reduces the production and process costs, reduces the plane size of the inductor and the current transformer, improves the space utilization, achieves high power density, and reduces the distance between the resonant inductor and the heat sink, ensuring the heat dissipation of the resonant inductor.
Smart Images
Figure CN223092669U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of inductors, in particular to a magnetic integration structure, a composite sensor and a power supply device. Background Technique
[0002] The CLLLC bidirectional circuit is applied to a bidirectional charging module for V2G, V2L, V2X, etc. In order to achieve bidirectional synchronous rectification, its hardware circuit design usually needs to realize high-frequency synchronous current acquisition through a hardware current transformer sampling. The current transformer and the resonant inductor can be independently designed. The primary side of the current transformer is connected in series with the resonant inductor to realize resonant current sampling. This method can effectively realize synchronous current signal acquisition.
[0003] However, the space resources of the power supply device module are very limited. If a relatively large resonant current is collected by connecting the primary side of the current transformer in series with the resonant inductor, both the resonant inductor and the current transformer will occupy a certain space, resulting in waste of planar space and low utilization rate of vertical space, affecting the design and specifications of other modules, thereby increasing the structural size and raising the system design cost. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the problem of low space utilization rate caused by the independent design of the current transformer and the resonant inductor in the prior art, and to propose a magnetic integration structure.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A magnetic integration structure, the magnetic integration structure includes the primary side of a current transformer, a magnetic core assembly and an electromagnetic wire. The primary side of the current transformer passes through the magnetic core assembly, the electromagnetic wire is wound around the magnetic core assembly to form a resonant inductor, and the electromagnetic wire is also wound around the primary side of the current transformer to form the primary side winding of the current transformer;
[0007] Preferably, the magnetic integration structure further includes a lower mounting plate and an upper mounting plate. The upper mounting plate is located above the lower mounting plate, and the upper mounting plate and the lower mounting plate are connected by columns. It is located between the lower mounting plate and the upper mounting plate, and a support member for supporting the primary side of the current transformer is mounted on the upper surface of the.
[0008] Preferably, the current transformer further includes a secondary side winding, and the turns ratio of the primary side winding to the secondary side winding is 200:1.
[0009] Preferably, the support member includes two support frames, both of the two support frames are fixedly connected to the upper surface of the upper mounting plate, and the two support frames are mutually attached.
[0010] Preferably, after the two support frames are fitted together, two cavities can be formed for the two ends of the primary side of the current transformer to pass through.
[0011] Preferably, a rectangular through groove adapted to the primary side of the current transformer is formed inside the upper mounting plate.
[0012] Preferably, through holes adapted to the two end parts of the primary side of the current transformer are formed inside the lower mounting plate.
[0013] Preferably, the number of the columns is four, and the four columns are distributed at intervals.
[0014] The present utility model further provides a composite sensor, and the composite sensor includes the magnetic integration structure as described above.
[0015] The present utility model further provides a power supply device, and the power supply device includes the magnetic integration structure as described above;
[0016] Alternatively, the power supply device includes the composite sensor as described above.
[0017] Compared with the prior art, the present utility model provides a magnetic integration structure, which has the following beneficial effects:
[0018] This solution cleverly utilizes the characteristic that the resonant inductor and the primary side of the current transformer are connected in series, so that the winding lead-out of the inductor serves as the input of the current transformer. While saving the primary side coil of the current transformer, the traditional inductive current sampling series current transformer requires at least 6 electrical connection points (2 for the inductor, 2 for each of the primary side and the secondary side of the current transformer), which is effectively reduced to 4 (1 for the inductor, 1 for the primary side of the current transformer, and 2 for the secondary side of the current transformer), thereby reducing the production and process costs; and compared with the traditional series connection method of the resonant inductor and the current transformer, the planar size of the inductor and the current transformer is reduced by half, so that the space size can be utilized more efficiently, and then while achieving high power density, the distance between the resonant inductor and the heat dissipation housing is reduced, effectively ensuring the heat dissipation of the resonant inductor. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.
[0020] Figure 2 is a connection schematic diagram of the lower mounting plate and the upper mounting plate of the present utility model.
[0021] Figure 3 is a three-dimensional structural schematic diagram of the support member of the present utility model.
[0022] In the figure:
[0023] 1. Lower mounting plate; 2. Upper mounting plate; 3. Column; 4. Resonant inductor; 5. Support member; 51. Support frame; 52. Cavity; 6. Primary side of current transformer; 7. Rectangular through slot; 8. Through hole. Specific embodiments
[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0025] Referring to Figures 1 to 3 , a magnetic integration structure, the magnetic integration structure includes the primary side 6 of a current transformer, a magnetic core assembly, and an electromagnetic wire. The primary side 6 of the current transformer is passed through the magnetic core assembly, and the electromagnetic wire is wound around the magnetic core assembly to form a resonant inductor 4, and the electromagnetic wire is also wound around the primary side 6 of the current transformer to form a primary winding of the current transformer.
[0026] Among them, the magnetic core assembly can be in a ring structure, and the primary side 6 of the current transformer can be in a "U" shape. By passing the primary side 6 of the current transformer through the magnetic core assembly in this solution, it enables the primary side 6 of the current transformer and the magnetic core assembly of the resonant inductor 4 to share part of the structural space. Compared with the traditional solution of independently designing the current transformer and the resonant inductor, it undoubtedly reduces the overall occupied space volume of the current transformer and the magnetic core assembly, thereby effectively improving the space utilization rate of the magnetic integration structure.
[0027] The magnetic integration structure further includes a lower mounting plate 1 and an upper mounting plate 2. The upper mounting plate 2 is located above the lower mounting plate 1, and the upper mounting plate 2 and the lower mounting plate 1 are connected by a column 3. The resonant inductor 4 is located between the lower mounting plate 1 and the upper mounting plate 2, and a support member 5 for supporting the primary side 6 of the current transformer is mounted on the upper surface of the upper mounting plate 2.
[0028] In this solution, the current transformer may further include a secondary winding corresponding to the primary winding. The ratio of the electromagnetic turns wound on the primary winding to the electromagnetic turns wound on the secondary winding is the turns ratio of the current transformer. In this embodiment, the magnet wire can be enameled wire. In an alternative embodiment, the turns ratio of the current transformer is 200:1, and 200 turns of enameled wire are wound on the secondary side of the current transformer. Thus, when a large current flows through the primary winding of the current transformer, a small current of 1 / 200 of the size will be correspondingly induced on the enameled wire of its secondary winding. For example, when a large current of 200 A flows through the primary winding, a small current of 1 A will be correspondingly induced on the secondary winding. The induced small current is then output to a main controller such as an MCU at the back end, and the main controller such as an MCU performs analog-to-digital conversion and corresponding data processing on the small current, and thus the magnitude of the large current flowing through the primary winding can be obtained. Since the magnet wires of the primary winding and the resonant inductor 4 are the same wire in this solution, the current sampling of the current transformer is also the flowing current of the resonant current, thereby enabling the current sampling function for the resonant inductor.
[0029] Of course, in practical applications, the turns ratio of the current transformer can also be other ratios, such as 100:1 or 300:1, and this solution does not limit this.
[0030] In this solution, since the resonant inductor 4 and the primary side 6 of the current transformer share the same electromagnetic wire, the resonant inductor 4 and the primary side 6 of the current transformer can be regarded as being connected in series. This solution cleverly utilizes the characteristic of the series connection of the resonant inductor 4 and the primary side 6 of the current transformer, making the winding outgoing line of the resonant inductor 4 the input of the primary side 6 of the current transformer. While saving the coil of the primary side 6 of the current transformer, the traditional inductive current sampling series current transformer requires at least 6 electrical connection points (2 for the inductor, 2 for the primary side and 2 for the secondary side of the current transformer), which is effectively reduced to 4 (1 for the inductor, 1 for the primary side of the current transformer, and 2 for the secondary side of the current transformer), thus reducing the production and process costs; and compared with the traditional series connection method of the resonant inductor 4 and the current transformer, the planar size of the resonant inductor 4 and the current transformer is reduced by half, so that the space size can be utilized more efficiently. Furthermore, while achieving high power density, the distance between the resonant inductor 4 and the heat dissipation case is reduced, effectively ensuring the heat dissipation of the resonant inductor 4. Specifically: The electromagnetic wire on the resonant inductor 4 requires 2 electrical connection points for current to flow in and out respectively, and the primary winding and secondary winding of the current transformer each require 2 electrical connection points for current to flow in and out respectively. Therefore, the current transformer in the traditional solution requires 6 electrical connection points, which is effectively reduced to 1 electrical connection point for current to flow into the 4 resonant inductors 4, 1 electrical connection point for current to flow out of the primary winding of the current transformer, and 2 electrical connection points for current to flow into and out of the secondary winding of the current transformer, reducing the production and process costs. And compared with the traditional series connection method of the resonant inductor 4 and the primary side 6 of the current transformer, since the current transformer and the resonant inductor 4 adopt an up-and-down interpenetrating structure, the planar size of the resonant inductor 4 and the current transformer is reduced by half, so that the space size can be utilized more efficiently. Furthermore, while achieving high power density, the distance between the resonant inductor 4 and the heat dissipation case is reduced, effectively ensuring the heat dissipation of the resonant inductor 4.
[0031] The support member 5 includes two support frames 51. Both of the two support frames 51 are fixedly connected to the upper surface of the upper mounting plate 2, and the two support frames 51 are in contact with each other; all the edges of the two support frames 51 are flush.
[0032] After the two support frames 51 are in contact, two cavities 52 can be formed for the two ends of the primary side 6 of the current transformer to pass through. There is a gap for the electromagnetic wire to be wound between the cavity 52 and the primary side 6 of the current transformer. Thus, the two support frames 51 can support the primary side 6 of the current transformer without affecting the specific use of the primary side 6 of the current transformer.
[0033] A rectangular through slot 7 adapted to the primary side 6 of the current transformer is opened inside the upper mounting plate 2, and a through hole 8 adapted to the two end portions of the primary side 6 of the current transformer is opened inside the lower mounting plate 1. Both the rectangular through slot 7 and the through hole 8 are for the primary side 6 of the current transformer to pass through.
[0034] There are four columns 3, and the four columns 3 are spaced apart; the height of the column 3 is greater than the thickness of the resonant inductor 4, so that the resonant inductor 4 can be located between the lower mounting plate 1 and the upper mounting plate 2, and thus the current transformer and the resonant inductor 4 can form an up-and-down cross structure.
[0035] The present utility model also provides a composite sensor, which includes a magnetic integration structure. The specific structure of the magnetic integration structure refers to the above embodiments. Since this composite sensor adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated herein one by one.
[0036] The present utility model also provides a power supply device, which includes a composite sensor. The specific structure of the composite sensor refers to the above embodiments. Since this power supply device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated herein one by one.
[0037] Alternatively, the power supply device includes a magnetic integration structure. The specific structure of the magnetic integration structure refers to the above embodiments. Since this power supply device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated herein one by one
[0038] Among them, the power supply device may further have a heat dissipation housing, and the magnetic integration structure may be disposed in the heat dissipation housing. Since the technical solution of the present utility model enables the primary magnetic core of the current transformer and the resonant inductor 4 to share the same electromagnetic wire, the positions occupied by the current transformer and the resonant inductor 4 in the power supply device can be reduced. At the same time, while improving the power density of the power supply device, the distance between the resonant inductor 4 and the heat dissipation housing can also be reduced, which is beneficial to improving the heat transfer efficiency of the resonant inductor 4.
[0039] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present utility model. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.
[0040] It should be noted that the standard components used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the inventor will not elaborate herein.
[0041] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0042] The above has described a specific embodiment of the present utility model in detail, but the content described is only the preferred embodiment of the present utility model and cannot be considered as used to limit the scope of implementation of the present utility model. Any equal changes and improvements made within the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.
Claims
1. A magnetic integration structure, characterized in that, The magnetic integration structure includes the primary side (6) of a current transformer, a magnetic core assembly, and electromagnetic wire. The primary side (6) of the current transformer passes through the magnetic core assembly, and the electromagnetic wire is wound around the magnetic core assembly to form a resonant inductor (4), and the electromagnetic wire is also wound around the primary side (6) of the current transformer to form the primary winding of the current transformer.
2. The magnetic integration structure according to claim 1, wherein The current transformer further includes a secondary winding, and the turn ratio of the primary winding to the secondary winding is 200:
1.
3. A magnetic integration structure according to claim 1, characterized in that, The magnetic integration structure further includes a lower mounting plate (1) and an upper mounting plate (2). The upper mounting plate (2) is located above the lower mounting plate (1), and the upper mounting plate (2) and the lower mounting plate (1) are connected by columns (3). The (4) is located between the lower mounting plate (1) and the upper mounting plate (2), and a support member (5) for supporting the primary side (6) of the current transformer is mounted on the upper surface of the (2).
4. A magnetic integration structure according to claim 3, characterized in that, The support member (5) includes two support frames, and both of the two support frames are fixedly connected to the upper surface of the upper mounting plate (2), and the two support frames are in contact with each other.
5. A magnetic integration structure according to claim 4, characterized in that After the two support frames are in contact, two cavities can be formed for the two ends of the primary side (6) of the current transformer to pass through.
6. A magnetic integration structure according to claim 3, characterized in that, A rectangular through groove (7) adapted to the primary side (6) of the current transformer is formed inside the upper mounting plate (2).
7. A magnetic integration structure according to claim 3, characterized in that Through holes (8) adapted to the two end portions of the primary side (6) of the current transformer are formed inside the lower mounting plate (1).
8. The magnetic integration structure according to claim 3, wherein, The number of the columns (3) is four, and the four columns (3) are spaced apart.
9. A composite sensor, characterized in that, The composite sensor includes the magnetic integration structure according to any one of claims 1 to 8.
10. A power supply device, characterized in that, The power supply device includes the magnetic integration structure according to any one of claims 1-8; Alternatively, the power supply device includes the composite sensor according to claim 9.