High-leakage-inductance coupling inductor structure for suppressing EMI (Electro-Magnetic Interference)

Abstract

The utility model discloses a large leakage inductance coupling inductor structure for inhibiting EMI, which belongs to the technical field of inductors and comprises a magnetic core, coils are wound on the outer side walls of two ends of the magnetic core, magnetic bars are arranged on two sides of the magnetic core, one side, far away from the magnetic core, of each coil is attached to the corresponding magnetic bar, a shielding layer is sleeved on the outer side wall of each magnetic bar, and the magnetic core is made of nanocrystalline and amorphous materials. The magnetic rod is made of manganese zinc materials and is rectangular, the number of the magnetic cores is two, the magnetic cores are U-shaped, and the two ends of the two magnetic cores are connected. According to the large-leakage-inductance coupling inductance structure for inhibiting EMI, the two magnetic cores are connected end to end, the coil is wound at the joint of the magnetic cores, the magnetic bars are additionally arranged on the two sides of the magnetic cores, and the magnetic cores made of nanocrystalline and amorphous materials provide high saturation magnetic flux density and low loss of the magnetic cores; and two rectangular magnetic bars made of manganese zinc are additionally arranged, so that the leakage inductance of the device is improved, and the electromagnetic interference on the alternating current side is favorably inhibited.

Description

Technical Field

[0001] This utility model belongs to the field of inductor technology, specifically, it relates to a large leakage inductance coupled inductor structure for suppressing EMI. Background Technology

[0002] In the field of modern power electronics technology, inverters play a crucial role and are widely used in many fields such as renewable energy power generation systems, industrial motor drives, and uninterruptible power supplies. Their main function is to convert DC power into AC power to meet the needs of different AC loads.

[0003] Traditional inductor structures often generate electromagnetic interference during operation, affecting the normal operation of the device itself and other surrounding electronic equipment. In the use of traditional coupled inductors, leakage inductance is often ignored or not fully utilized. Therefore, it is difficult to use mutual inductance to limit circulating current while using leakage inductance to suppress electromagnetic interference on the AC side, thus reducing the suppression effect of electromagnetic interference.

[0004] To address the aforementioned issues, this application proposes a large leakage inductance coupled inductor structure for suppressing EMI. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a large leakage inductance coupled inductor structure to suppress EMI, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A large leakage inductance coupled inductor structure for suppressing EMI includes a magnetic core, with coils wound around the outer walls at both ends of the magnetic core, and magnetic rods disposed on both sides of the magnetic core. The side of the coils away from the magnetic core is in contact with the magnetic rods, and a shielding layer is sleeved on the outer wall of the magnetic rods. The magnetic core is made of nanocrystalline and amorphous materials, and the magnetic rods are made of manganese-zinc material and are rectangular.

[0008] Preferably, two magnetic cores are provided. The magnetic cores are U-shaped and their two ends are connected. By setting the magnetic cores and the coil, the two ends of the two magnetic cores are connected to each other, and the coil is wound at the connection point of the two magnetic cores.

[0009] Preferably, the outer wall of the shielding layer is fitted with a mounting frame, a heat dissipation frame is fixedly connected to the center of the side of the mounting frame away from the shielding layer, and a fixing frame is fixedly connected to the center of the side of the heat dissipation frame away from the mounting frame. By setting the mounting frame, the heat dissipation frame and the fixing frame, the mounting frame limits the installation of the inductor.

[0010] Preferably, a fixing bracket is fixedly connected to the inner side wall of the fixing frame, and a cooling fan is provided on the outer side wall of the fixing bracket. By setting the fixing bracket and the cooling fan, the cooling fan is fixed inside the fixing frame through the fixing bracket, so that the cooling fan can dissipate heat from the inside of the cooling frame.

[0011] Preferably, the inner wall of the heat dissipation frame is provided with a heat dissipation plate, and a connecting post is fixedly connected to the side of the heat dissipation plate near the mounting frame. A heat dissipation fin is fixedly connected to the end of the connecting post away from the heat dissipation plate. By setting the heat dissipation plate, the connecting post and the heat dissipation fin, the heat dissipation plate is located inside the heat dissipation frame, and the heat dissipation plate is connected to the heat dissipation fin through the connecting post, so that the heat dissipation plate can dissipate heat from the heat dissipation fin.

[0012] Preferably, the heat dissipation fins are located on the inner side wall of the mounting frame, and the side of the heat dissipation fins away from the connecting post is attached to the outer side wall of the shielding layer. By setting the connecting post and the heat dissipation fins, heat dissipation of the inductor is achieved by placing the heat dissipation fins inside the mounting frame.

[0013] Preferably, the outer wall of the heat dissipation frame is provided with heat dissipation holes. By providing heat dissipation holes, a number of heat dissipation holes are provided on the outer wall of the heat dissipation frame, so that the hot gas inside the heat dissipation frame can be discharged.

[0014] In summary, the technical effects and advantages of this utility model are as follows: This large leakage inductance coupled inductor structure for suppressing EMI, through the arrangement of a magnetic core, a coil, and magnetic rods, consists of two magnetic cores connected end to end, with the coil wound at the connection point of the magnetic cores, and magnetic rods added to both sides of the magnetic cores. The magnetic cores, made of nanocrystalline and amorphous materials, provide high saturation magnetic flux density and low core loss. Furthermore, by adding two rectangular magnetic rods made of manganese-zinc, the leakage inductance of the device is increased, thereby helping to suppress electromagnetic interference on the AC side. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the coil and related structures of this utility model;

[0017] Figure 3 This is a schematic diagram of the magnetic rod and related structures of this utility model;

[0018] Figure 4 This is a schematic diagram of the heat dissipation fins and related structures of this utility model.

[0019] In the diagram: 1. Magnetic core; 2. Coil; 3. Magnetic rod; 4. Shielding layer; 5. Mounting frame; 6. Heat dissipation frame; 7. Fixing frame; 8. Fixing bracket; 9. Cooling fan; 10. Heat dissipation plate; 11. Connecting post; 12. Heat dissipation fins; 13. Heat dissipation holes. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-3 A large leakage inductance coupled inductor structure for suppressing EMI includes a magnetic core 1, coils 2 wound around the outer walls of both ends of the magnetic core 1, and magnetic rods 3 disposed on both sides of the magnetic core 1. The side of the coils 2 away from the magnetic core 1 is attached to the magnetic rods 3. A shielding layer 4 is sleeved on the outer wall of the magnetic rods 3. The magnetic core 1 is made of nanocrystalline and amorphous materials, and the magnetic rods 3 are made of manganese-zinc material and are rectangular. By winding the coils 2 around the two ends of the magnetic core 1 and attaching the magnetic rods 3 to both sides of the magnetic core 1, the magnetic core 1, made of nanocrystalline and amorphous materials, can provide high saturation magnetic flux density and low loss. In addition, the rectangular magnetic rods 3 made of manganese-zinc material are added to improve the leakage inductance of the device, which helps to suppress electromagnetic interference on the AC side, thereby ensuring the EMI suppression effect in high-frequency environments.

[0022] Reference Figure 2-3 There are two magnetic cores 1. The magnetic cores 1 are U-shaped and the two ends of the two magnetic cores 1 are connected. By connecting the two ends of the two magnetic cores 1, the two magnetic cores 1 form a ring. A coil 2 is wound at the connection point of the magnetic cores 1, and both coils 2 are wound at the connection point of the magnetic cores 1. The coils 2 adopt the interleaved and multi-layer planar winding technology to minimize parasitic effects.

[0023] Reference Figure 1 and Figure 4 The outer wall of the shielding layer 4 is fitted with a mounting frame 5. A heat dissipation frame 6 is fixedly connected to the center of the side of the mounting frame 5 away from the shielding layer 4. A fixing frame 7 is fixedly connected to the center of the side of the heat dissipation frame 6 away from the mounting frame 5. By placing the magnetic core 1, coil 2 and magnetic rod 3 inside the mounting frame 5, the inductor can be limited by the mounting frame 5, effectively preventing the inductor from becoming loose. The heat dissipation frame 6 is installed at the center of the side of the mounting frame 5 away from the inductor, and the equipment can be cooled and protected by the heat dissipation frame 6.

[0024] Reference Figure 4 A fixing frame 8 is fixedly connected to the inner side wall of the fixing frame 7, and a cooling fan 9 is provided on the outer side wall of the fixing frame 8. The cooling fan 9 is fixed inside the fixing frame 7 by the fixing frame 8, so that the cooling fan 9 can operate inside the fixing frame 7 and drive the air into the heat sink 6, thereby cooling the inductor through the air entering the heat sink 6.

[0025] Reference Figure 4A heat sink 10 is provided on the inner wall of the heat sink frame 6. A connecting post 11 is fixedly connected to the side of the heat sink 10 near the mounting frame 5. A heat sink fin 12 is fixedly connected to the end of the connecting post 11 away from the heat sink 10. By installing the heat sink 10 inside the heat sink frame 6 and connecting the heat sink 10 to the heat sink fin 12 inside the mounting frame 5 through the connecting post 11, the heat generated by the inductor can be conducted to the inside of the heat sink 10 through the heat sink fin 12. The heat sink 10 is then cooled by the cooling fan 9, which in turn cools the heat sink fin 12.

[0026] Reference Figure 4 The heat dissipation fin 12 is located on the inner wall of the mounting frame 5. The side of the heat dissipation fin 12 away from the connecting post 11 is attached to the outer wall of the shielding layer 4. By attaching the inductor to the heat dissipation fin 12, the heat generated by the inductor can be conducted to the interior of the heat dissipation fin 12, thereby effectively reducing the heat of the inductor and thus effectively preventing the inductor from overheating and affecting the EMI suppression effect.

[0027] Reference Figure 4 The outer side wall of the heat sink frame 6 is provided with heat dissipation holes 13. By opening a number of heat dissipation holes 13 on the outer side wall of the heat sink frame 6, the heat dissipation holes 13 opened in the heat sink frame 6 can improve the heat dissipation effect of the heat sink 10. When the cooling fan 9 dissipates heat on the heat sink 10, it can exhaust hot gas through the heat dissipation holes 13, thereby improving the heat dissipation effect of the heat sink 10.

[0028] Working principle: By connecting the two magnetic cores 1 end to end and winding two sets of coils 2 around the connection of the two magnetic cores 1, the magnetic cores 1, made of nanocrystalline and amorphous materials, can provide the inductor with high saturation magnetic flux density and low loss. Rectangular magnetic rods 3 made of manganese zinc are set on both sides of the magnetic cores 1, which can improve the leakage inductance of the device and help suppress electromagnetic interference on the AC side, thereby ensuring the EMI suppression effect in high-frequency environments. By providing a shielding layer 4 on the outer wall of the magnetic cores 1, coils 2 and magnetic rods 3, the shielding layer 4 can effectively shield the magnetic field generated inside the inductor from leaking outward, thereby suppressing EMI. By installing the inductor inside the mounting frame 5 and making the inductor fit against the heat sink fins 12, the heat absorbed by the heat sink fins 12 is conducted to the inside of the heat sink 10 through the connecting post 11. The heat sink 10 is cooled by the cooling fan 9, thereby reducing the temperature of the inductor and effectively preventing the temperature from being too high and affecting the EMI suppression effect.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A large leakage inductance coupled inductor structure for suppressing EMI, comprising a magnetic core (1), characterized in that, The magnetic core (1) has coils (2) wound around its outer walls at both ends. Magnetic rods (3) are provided on both sides of the magnetic core (1). The side of the coil (2) away from the magnetic core (1) is in contact with the magnetic rod (3). The outer wall of the magnetic rod (3) is covered with a shielding layer (4). The magnetic core (1) is made of nanocrystalline and amorphous materials. The magnetic rod (3) is made of manganese zinc material. The magnetic rod (3) is rectangular.

2. The large leakage inductance coupled inductor structure for suppressing EMI according to claim 1, characterized in that, Two magnetic cores (1) are provided. The magnetic cores (1) are U-shaped and the two ends of the two magnetic cores (1) are connected together.

3. The large leakage inductance coupled inductor structure for suppressing EMI according to claim 1, characterized in that, The outer wall of the shielding layer (4) is fitted with an installation frame (5), and a heat dissipation frame (6) is fixedly connected to the center of the side of the installation frame (5) away from the shielding layer (4), and a fixing frame (7) is fixedly connected to the center of the side of the heat dissipation frame (6) away from the installation frame (5).

4. The large leakage inductance coupled inductor structure for suppressing EMI according to claim 3, characterized in that, The inner wall of the fixed frame (7) is fixedly connected to a fixed bracket (8), and the outer wall of the fixed bracket (8) is provided with a cooling fan (9).

5. The large leakage inductance coupled inductor structure for suppressing EMI according to claim 3, characterized in that, The inner wall of the heat dissipation frame (6) is provided with a heat dissipation plate (10). A connecting column (11) is fixedly connected to the side of the heat dissipation plate (10) near the mounting frame (5). A heat dissipation fin (12) is fixedly connected to the end of the connecting column (11) away from the heat dissipation plate (10).

6. The large leakage inductance coupled inductor structure for suppressing EMI according to claim 5, characterized in that, The heat dissipation fin (12) is located on the inner wall of the mounting frame (5), and the side of the heat dissipation fin (12) away from the connecting column (11) is attached to the outer wall of the shielding layer (4).

7. The large leakage inductance coupled inductor structure for suppressing EMI according to claim 3, characterized in that, The outer wall of the heat dissipation frame (6) is provided with heat dissipation holes (13).

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