High-voltage-resistant common-mode inductor

Abstract

The utility model provides a high-voltage-resistant common-mode inductor which comprises a framework base, a flat copper coil and a magnetic core body, the flat copper coil is wound on the magnetic core body, the bottom end of the flat copper coil penetrates through a penetrating hole formed in the framework base and extends to the bottom of the framework base, two sets of L-shaped reinforcing plates are arranged on the top of the framework base, and the two sets of L-shaped reinforcing plates are arranged on the framework base. The L-shaped reinforcing plate is used for reinforcing the magnetic core body, the bottom end of the L-shaped reinforcing plate is inserted into a fixing hole formed in the framework base, a cavity is formed in the L-shaped reinforcing plate, a spring is fixedly connected to the inner wall of the cavity, an extrusion plate is fixedly connected to one end of the spring, and a limiting rod is fixedly connected to the side, away from the spring, of the extrusion plate. The high-voltage-resistant common-mode inductor solves the problems that an existing common-mode inductor is usually high in height and large in size, so that when the common-mode inductor is used on small electronic equipment, the size of the equipment is increased, and the requirement for miniaturization design is difficult to meet.

Description

Technical Field

[0001] This utility model relates to the field of common mode inductor technology, specifically a high-voltage resistant common mode inductor. Background Technology

[0002] Common-mode inductors are commonly used in switching power supplies of electronic devices to filter common-mode electromagnetic interference signals. Existing common-mode inductors typically have two coils with the same number of turns and phase but opposite winding directions wound on the same magnetic core. When normal current flows through the common-mode inductor, the current generates opposite magnetic fields in the inductor coils wound in the same phase, which cancel each other out. When common-mode current flows through the coil, due to the unidirectional nature of the common-mode current, a unidirectional magnetic field is generated in the coil, increasing the coil's inductive reactance and making the coil exhibit high impedance, thus producing a strong damping effect. This attenuates the common-mode current and achieves the purpose of filtering.

[0003] Existing common-mode inductors are typically tall and large, which inevitably increases the size of small electronic devices when used in them, making it difficult to meet the requirements of miniaturization design.

[0004] Therefore, it is necessary to provide a new high-voltage common-mode inductor to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a high-voltage common-mode inductor with a small size that can meet the requirements of miniaturization.

[0006] The high-voltage common-mode inductor provided by this utility model includes a frame base, a flat copper coil and a magnetic core body. The flat copper coil is wound on the magnetic core body, and the bottom end of the flat copper coil passes through a hole opened in the frame base and extends to the bottom of the frame base.

[0007] To achieve the effect of reinforcing the magnetic core body, as provided by this utility model for a high-voltage common-mode inductor, preferably, the top of the frame base is provided with two sets of L-shaped reinforcing plates. The L-shaped reinforcing plates are used to reinforce the magnetic core body. The bottom end of the L-shaped reinforcing plate is inserted into the fixing hole opened in the frame base. A cavity is opened inside the L-shaped reinforcing plate. A spring is fixedly connected to the inner wall of the cavity. A compression plate is fixedly connected to one end of the spring. A limit rod is fixedly connected to the side of the compression plate away from the spring. One end of the limit rod passes through the insertion hole opened in the L-shaped reinforcing plate and is inserted into the limit hole opened in the frame base.

[0008] In order to increase the friction between the L-shaped reinforcing plate and the magnetic core body, as a high-voltage common-mode inductor provided by this utility model, preferably, a friction pad is fixedly connected to the bottom of the L-shaped reinforcing plate, and the friction pad abuts against the magnetic core body.

[0009] In order to achieve the effect of separating the two flat copper coils, as provided by this utility model for a high voltage resistant common mode inductor, preferably, a partition plate is fixedly connected to the top of the frame base, and the partition plate separates the two flat copper coils.

[0010] To achieve a more practical effect for the frame base, as provided by this utility model, the high-voltage common-mode inductor is preferably designed with a reinforced structure on the four legs of the frame base, the leg spacing of which meets the product's KV high voltage requirements, and the height of the four legs of the frame base is higher than that of a conventional base.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This high-voltage common-mode inductor features a reinforced four-legged frame design. The leg spacing meets the 3KV high-voltage requirement of the product, and the frame is 10-15mm higher than conventional frame bases. This allows for the use of space underneath the frame base to install capacitors or other components, significantly saving PCB space and meeting miniaturization design requirements. Furthermore, the bottom of the flat copper coil extends to the bottom of the frame base, simplifying the inductor manufacturing process and reducing production costs. This solves the problem that existing common-mode inductors are typically tall and large, inevitably increasing the size of small electronic devices and hindering miniaturization design requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the high-voltage common-mode inductor provided by this utility model;

[0014] Figure 2 This is a side view of the structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the L-shaped reinforcing plate structure of this utility model;

[0016] Figure 4 This is an exploded view of the structure of this utility model.

[0017] The components include: 1. Frame base; 101. L-shaped reinforcing plate; 102. Fixing hole; 103. Chamber; 104. Spring; 105. Extrusion plate; 106. Limiting rod; 107. Insertion hole; 108. Limiting hole; 109. Friction pad; 110. Partition plate; 2. Flat copper coil; 3. Magnetic core body; 4. Perforation. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4,in Figure 1 This is a schematic diagram of the structure of the high-voltage common-mode inductor provided by this utility model; Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the L-shaped reinforcing plate structure of this utility model; Figure 4 This is an exploded view of the structure of this utility model. A high-voltage common-mode inductor includes a frame base 1, a flat copper coil 2, and a magnetic core body 3. The flat copper coil 2 is wound on the magnetic core body, and the bottom end of the flat copper coil 2 passes through a through hole 4 in the frame base 1 and extends to the bottom of the frame base 1. A partition plate 110 is fixedly connected to the top of the frame base 1, and the partition plate 110 separates the two flat copper coils 2. The four feet of the frame base 1 adopt a reinforced structural design, and its foot spacing design meets the 3KV high voltage requirement of the product. The height of the four feet of the frame base 1 is higher than that of a conventional base.

[0021] The above technical solution involves first winding flat copper coils 2 on the two side pillars of the magnetic core body 3, and then shaping the four legs of the flat copper coils 2 and inserting them into the through holes 4 opened in the frame base 1 to complete the assembly. This simplifies the common mode inductor manufacturing process and reduces the manufacturing cost of the common mode inductor. At the same time, the four legs of the frame base 1 adopt a reinforced structure design, and the height of the four legs is 10-15 mm higher than that of the conventional base, which meets the safety distance requirements of 3KV high voltage and the requirement that the space under the common mode inductor can be utilized, greatly saving PCB space and meeting the requirements of miniaturization design.

[0022] Reference Figure 1 , Figure 2 and Figure 3 The top of the frame base 1 is provided with two sets of L-shaped reinforcing plates 101. The L-shaped reinforcing plates 101 are used to reinforce the magnetic core body 3. The bottom end of the L-shaped reinforcing plate 101 is inserted into the fixing hole 102 opened in the frame base 1. A cavity 103 is opened inside the L-shaped reinforcing plate 101. A spring 104 is fixedly connected to the inner wall of the cavity 103. A compression plate 105 is fixedly connected to one end of the spring 104. A limit rod 106 is fixedly connected to the side of the compression plate 105 away from the spring 104. One end of the limit rod 106 passes through the insertion hole 107 opened in the L-shaped reinforcing plate 101 and is inserted into the limit hole 108 opened in the frame base 1. After the skeleton base 1, flat copper coil 2 and magnetic core body 3 are assembled, the bottom end of the L-shaped reinforcing plate 101 is inserted into the fixing hole 102, and the L-shaped reinforcing plate 101 contacts the magnetic core body 3. The magnetic core body 3 is reinforced by the L-shaped reinforcing plate 101, making the magnetic core body 3 more stable on the top of the skeleton base 1. One end of the limiting rod 106 in the cavity 103 is inserted into the limiting hole 108 by the elastic action of the spring 104. The L-shaped reinforcing plate 101 is fixed in the fixing hole 102 by the cooperation of the limiting rod 106 and the limiting hole 108, thereby making the L-shaped reinforcing plate 101 more stable when reinforcing the magnetic core body 3.

[0023] Reference Figure 3 A friction pad 109 is fixedly connected to the bottom of the L-shaped reinforcing plate 101. The friction pad 109 abuts against the magnetic core body 3. The friction pad 109 is used to increase the friction between the L-shaped reinforcing plate 101 and the magnetic core body 3, so that the L-shaped reinforcing plate 101 has a higher reinforcement effect on the magnetic core body 3.

[0024] The implementation principle of a high-voltage common-mode inductor according to this utility model embodiment is as follows: First, a flat copper coil 2 is wound on the two pillars of the magnetic core body 3. Then, the four legs of the flat copper coil 2 are shaped and inserted into the through holes 4 opened in the frame base 1 to complete the assembly. This makes the common-mode inductor manufacturing process simpler and reduces the manufacturing cost of the common-mode inductor. At the same time, the four legs of the frame base 1 adopt a reinforced structure design, and the height of the four legs is 10-15 mm higher than that of the conventional base, which meets the safety distance requirements of 3KV high voltage and the requirement that the space under the common-mode inductor can be utilized, which greatly saves PCB space and meets the requirements of miniaturization design.

[0025] All standard parts used in this utility model can be purchased from the market. Irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. Furthermore, the structure and principle of the components known to those skilled in the art can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-voltage common-mode inductor, characterized in that: It includes a skeleton base (1), a flat copper coil (2) and a magnetic core body (3). The flat copper coil (2) is wound around the magnetic core body (3). The bottom end of the flat copper coil (2) passes through a hole (4) opened in the skeleton base (1) and extends to the bottom of the skeleton base (1).

2. The high-voltage common-mode inductor according to claim 1, characterized in that: The top of the frame base (1) is provided with two sets of L-shaped reinforcing plates (101). The L-shaped reinforcing plates (101) are used to reinforce the magnetic core body (3). The bottom end of the L-shaped reinforcing plate (101) is inserted into the fixing hole (102) opened in the frame base (1). The L-shaped reinforcing plate (101) has a cavity (103) inside. A spring (104) is fixedly connected to the inner wall of the cavity (103). A compression plate (105) is fixedly connected to one end of the spring (104). A limiting rod (106) is fixedly connected to the side of the compression plate (105) away from the spring (104). One end of the limiting rod (106) passes through the insertion hole (107) opened in the L-shaped reinforcing plate (101) and is inserted into the limiting hole (108) opened in the frame base (1).

3. A high-voltage common-mode inductor according to claim 2, characterized in that: The bottom of the L-shaped reinforcing plate (101) is fixedly connected to a friction pad (109), which abuts against the magnetic core body (3).

4. A high-voltage common-mode inductor according to claim 1, characterized in that: The top of the frame base (1) is fixedly connected to a partition plate (110), which separates the two flat copper coils (2).

5. A high-voltage common-mode inductor according to claim 1, characterized in that: The frame base (1) adopts a reinforced structure design for its four legs. Its leg spacing design meets the product's 3KV high voltage requirement, and the height of the four legs of the frame base (1) is higher than that of a conventional base.

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