A large current filter

Abstract

The utility model relates to the technical field of electrical components, and specifically relates to a large current filter, and the auxiliary device comprises a circuit board, a circular magnet, a rotating coil, a fixing block, a resistor and a capacitor. After the rotating coil is wound on the circular magnet, the contact area on the circuit board is connected, and then the appropriate resistor and capacitor are installed, so that the device can be used normally. The device assembles the capacitor, the resistor and the common mode inductance on one circuit board, reduces the space of the filter, reduces the loss, reduces the cost, effectively reduces the manufacturing difficulty by using the modular installation mode, has good practicability and economy, and is beneficial to the promotion and use of the device.

Description

Technical Field

[0001] This utility model relates to the technical field of electrical components, specifically to a high-current filter. Background Technology

[0002] A filter is a filtering circuit composed of capacitors, inductors, and resistors. It effectively filters or enhances signals of specific frequencies using these components to purify signals, suppress interference, and improve signal quality. Currently, common-mode inductors in high-current filters are typically supplied independently by magnetic core component manufacturers. This requires multiple components to be connected and soldered sequentially, resulting in low integration and a tendency to cause open circuits, which in turn hinders heat dissipation and reduces losses. Utility Model Content

[0003] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a high-current filter that effectively reduces filter space, has high integration, and simplifies manufacturing difficulty.

[0004] The technical solution adopted by this utility model is as follows: a high current filter, including a circuit board containing several independent lines; the two ends of the independent lines are provided with contact areas on the surface of the circuit board, a circular magnet is provided on the first side of the circuit board, several spiral coils are wound on the circular magnet, and the two ends of the spiral coils are connected to the contact areas at both ends of the independent lines; a series hole is connected in the middle of the independent lines, and a resistor and a capacitor are connected in the series hole.

[0005] In one embodiment, the number of independent circuits is two, and the two independent circuits are symmetrically arranged on the circuit board.

[0006] In one embodiment, a plurality of fixing grooves are provided in the contact area, and the end of the spiral coil passes through and is slidably connected to the fixing grooves.

[0007] In one embodiment, the spiral coil comprises several flat single conductors, which are symmetrically wound and then stacked to form the spiral coil, thereby improving the high-frequency performance of the inductor and reducing heat loss.

[0008] In one embodiment, the outer periphery of the wound coil is wrapped with an insulating layer.

[0009] In one embodiment, the single conductor is made of aluminum; or copper; or an aluminum product covered with a copper coating.

[0010] In one embodiment, a fixing block is provided on the contact area, the fixing block is provided with a fixing through hole, and a fixing nut is provided in the fixing through hole. The fixing nut is used to fix the wire connection device.

[0011] In one embodiment, the fixing block passes through and is slidably connected to the fixing groove.

[0012] The beneficial effects of this utility model are as follows: This utility model is a high-current filter that effectively reduces filter space, has high integration, and simplifies manufacturing difficulty; specifically, its beneficial effects are:

[0013] 1. By assembling capacitors, resistors, and common-mode inductors on a single circuit board, integration is improved, fabrication is simplified, filter space is reduced, losses are decreased, and costs are lowered.

[0014] 2. By improving the flat winding method of the common-mode inductor, leakage flux is reduced, the influence of differential-mode current excitation is decreased, and inductor saturation is prevented;

[0015] 3. Innovative multi-strand flat wire winding technology is adopted to improve the high-frequency performance of the inductor and reduce heat loss, ensuring the stability and long-term reliability of the inductor under high current operating conditions. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is the second three-dimensional structural schematic diagram of this utility model;

[0019] Figure 3 This is the third three-dimensional structural schematic diagram of this utility model;

[0020] Figure 4 This is a partial three-dimensional structural schematic diagram of the present invention.

[0021] Figure descriptions: 1. Circuit board; 11. Contact area; 12. Fixing groove; 2. Circular magnet; 3. Winding coil; 31. Single wire; 4. Fixing block; 41. Fixing nut; 5. Resistor; 6. Capacitor. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] The following is combined with Figure 1-4 This invention describes a high-current filter, comprising a circuit board 1 containing several independent circuits. Specifically, this invention uses a PCB board. Contact areas 11 are provided at both ends of the independent circuits on the surface of the circuit board 1. Several fixing slots 12 are provided within the contact areas 11. The ends of the spiral coils 3 are inserted into and slidably connected to the fixing slots 12. A circular magnet 2 is provided on one side of the circuit board 1. In this invention, a nanocrystalline magnetic core material is used, which has the characteristics of high saturation magnetic induction intensity, low hysteresis, low iron loss, and good high-frequency characteristics. Several spiral coils 3 are wound on the circular magnet 2, and the two ends of the spiral coils 3 are connected to the contact areas 11 at both ends of the independent circuits. A series hole is provided in the middle of the independent circuits to facilitate the connection of components. Components can be directly inserted, simplifying the manufacturing process. A resistor 5 and a capacitor 6 are connected in the series hole. The resistor 5 and capacitor 6 can be matched according to actual conditions.

[0025] Beneficially, there are two independent circuits, which are symmetrically arranged on circuit board 1.

[0026] Beneficially, the spiral coil 3 comprises several flat single conductors 31, which are symmetrically wound and stacked to form the spiral coil 3, thereby improving the high-frequency performance of the inductor and reducing heat loss; at the same time, the outer side of the spiral coil 3 is wrapped with an insulating layer, such as insulating varnish, mica wire, etc.

[0027] Advantageously, the single conductor 31 is made of aluminum; or copper; or aluminum with a copper coating, and in this case, copper conductors are preferred.

[0028] Beneficially, a fixing block 4 is provided on the contact area 11, and a fixing through hole is provided on the fixing block 4. A fixing nut 41 is provided in the fixing through hole. The fixing nut 41 is used to fix the wire connection device. The fixing block 4 is inserted into and slidably connected to the fixing groove 12, which facilitates disassembly and replacement.

[0029] Working principle of this utility model:

[0030] The capacitor 6, resistor 5, and common-mode inductor are assembled on a single circuit board 1, which improves integration, simplifies fabrication, reduces filter space, lowers losses, and reduces costs. Furthermore, by improving the flat winding method of the common-mode inductor, leakage flux is reduced, the influence of differential-mode current excitation is minimized, and inductor saturation is prevented. Innovative multi-strand flat wire winding technology is adopted to improve the high-frequency performance of the inductor and reduce heat loss, ensuring the stability and long-term reliability of the inductor under high-current operating conditions.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A high-current filter, characterized in that: The circuit board (1) includes several independent circuits; the two ends of the independent circuits are provided with contact areas (11) on the surface of the circuit board (1); a circular magnet (2) is provided on one side of the circuit board (1); several spiral coils (3) are wound on the circular magnet (2); the two ends of the spiral coils (3) are connected to the contact areas (11) at both ends of the independent circuits; a series hole is connected in the middle of the independent circuits; a resistor (5) and a capacitor (6) are connected in the series hole.

2. The high-current filter according to claim 1, characterized in that: The number of independent lines is two, and the two independent lines are symmetrically arranged on the circuit board (1).

3. The high-current filter according to claim 1, characterized in that: The contact area (11) is provided with several fixing slots (12), and the end of the spiral coil (3) is inserted into and slidably connected to the fixing slots (12).

4. The high-current filter according to claim 3, characterized in that: The spiral coil (3) comprises several flat single wires (31), which are symmetrically wound and stacked to form the spiral coil (3), in order to improve the high-frequency performance of the inductor and reduce heat loss.

5. The high-current filter according to claim 4, characterized in that: The outer side of the wound coil (3) is wrapped with an insulating layer.

6. The high-current filter according to claim 4, characterized in that: The single conductor (31) is made of aluminum; or copper; or an aluminum product covered with a copper coating.

7. The high-current filter according to claim 3, characterized in that: A fixing block (4) is provided on the contact area (11), and a fixing through hole is provided on the fixing block (4). A fixing nut (41) is provided in the fixing through hole, and the fixing nut (41) is used to fix the wire connection device.

8. The high-current filter according to claim 7, characterized in that: The fixing block (4) is inserted into and slidably connected to the fixing groove (12).

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