Large-current inverter inductor

Abstract

The utility model discloses a large-current inverter inductor which comprises a circuit board, a first protective cover and a second protective cover are fixed to the top end of the circuit board, and a first magnetic core assembly and a second magnetic core assembly are installed in the first protective cover and the second protective cover respectively. The surface of the first magnetic core assembly is respectively connected with a first pin and a second pin, the surface of the second magnetic core assembly is respectively connected with a third pin and a fourth pin, and windings are wound on the surfaces of the first magnetic core assembly and the second magnetic core assembly. According to the utility model, the two groups of inductors are connected in parallel to share current, the total current bearing capacity is improved, and the temperature rise of a single inductor is reduced, so that a photovoltaic energy storage system or an industrial large-current scene can be met, the system reliability can be improved, and partial power transmission can still be maintained when a single inductor fails.

Description

Technical Field

[0001] This utility model relates to the field of inverter inductor technology, specifically a high-current inverter inductor. Background Technology

[0002] An inverter inductor is an inductor used in an inverter. Its main function is to filter and regulate the current, ensuring the stability of the AC output power from the inverter. An inverter is a device that converts direct current (DC) to alternating current (AC), and is widely used in solar power generation, uninterruptible power supplies (UPS), and electric vehicle charging stations.

[0003] Inverter inductors are core components in inverter systems used to handle high currents. Their design and performance directly affect energy conversion efficiency and system stability. However, conventional inverter inductors have limited total current carrying capacity. When a large current is applied, they heat up quickly and their reliability decreases, making it difficult to meet the requirements of photovoltaic energy storage systems or industrial high-current scenarios. Therefore, we propose a high-current inverter inductor. Utility Model Content

[0004] The purpose of this invention is to provide a high-current inverter inductor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-current inverter inductor, comprising a circuit board, wherein a first protective cover and a second protective cover are fixed to the top of the circuit board, and a first magnetic core assembly and a second magnetic core assembly are respectively installed inside the first protective cover and the second protective cover. A first pin and a second pin are respectively connected to the surface of the first magnetic core assembly, and a third pin and a fourth pin are respectively connected to the surface of the second magnetic core assembly. Windings are wound around the surfaces of the first magnetic core assembly and the second magnetic core assembly.

[0006] Preferably, the surface of the circuit board is provided with a first pad, a second pad, a third pad, and a fourth pad.

[0007] Preferably, the first pin, the second pin, the third pin, and the fourth pin are soldered to the first pad, the second pad, the third pad, and the fourth pad, respectively.

[0008] Preferably, the inner side of the winding is wound with mica tape, and the outer side of the winding is wound with polyimide film.

[0009] Preferably, a first opening and a second opening are respectively provided on the outer walls of the first protective cover and the second protective cover.

[0010] Preferably, a first heat dissipation window and a second heat dissipation window are respectively provided inside the circuit board at the positions of the first protective cover and the second protective cover.

[0011] Preferably, mounting holes are provided on both sides of the surface of the circuit board.

[0012] Preferably, a support foot is fixed at the corner of the bottom end of the circuit board.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This high-current inverter inductor is composed of a first magnetic core assembly and a second magnetic core assembly of the same model connected in parallel. Correspondingly, a first protective cover and a second protective cover are set on the circuit board to protect the first magnetic core assembly and the second magnetic core assembly. The first magnetic core assembly and the second magnetic core assembly have first pins, second pins, third pins and fourth pins, which are soldered and fixed to the first pads, second pads, third pads and fourth pads on the surface of the circuit board. By sharing the current in parallel, the total current carrying capacity is improved and the temperature rise of a single inductor is reduced. This can meet the needs of photovoltaic energy storage systems or industrial high-current scenarios. Moreover, this design can improve system reliability, and can still maintain partial power output when a single inductor fails. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0017] Figure 3 This is a side view of the structure of this utility model;

[0018] Figure 4 This is an enlarged cross-sectional view of the first magnetic core assembly of this utility model;

[0019] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Circuit board; 2. First protective cover; 3. First magnetic core assembly; 4. First pin; 5. Second pin; 6. Second protective cover; 7. Second magnetic core assembly; 8. Third pin; 9. Fourth pin; 10. First pad; 11. Second pad; 12. Third pad; 13. Fourth pad; 14. First heat dissipation window; 15. Second heat dissipation window; 16. Mounting hole; 17. Support; 18. First through-hole; 19. Second through-hole; 20. Winding; 21. Mica tape; 22. Polyimide film. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0022] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-5 The present invention provides an embodiment of a high-current inverter inductor, comprising a circuit board 1, a first protective cover 2 and a second protective cover 6 fixed at the top of the circuit board 1, a first magnetic core assembly 3 and a second magnetic core assembly 7 respectively installed inside the first protective cover 2 and the second protective cover 6, a first pin 4 and a second pin 5 respectively connected to the surface of the first magnetic core assembly 3, a third pin 8 and a fourth pin 9 respectively connected to the surface of the second magnetic core assembly 7, and a winding 20 wound around the surface of the first magnetic core assembly 3 and the second magnetic core assembly 7.

[0024] Specifically, the high-current inverter inductor is composed of a first magnetic core assembly 3 and a second magnetic core assembly 7 of the same model connected in parallel. A first protective cover 2 and a second protective cover 6 are set on the circuit board 1 to protect the first magnetic core assembly 3 and the second magnetic core assembly 7. The first magnetic core assembly 3 and the second magnetic core assembly 7 have first pins 4 and second pins 5, third pins 8 and fourth pins 9 led out and are welded to the first pads 10, second pads 11, third pads 12 and fourth pads 13 on the surface of the circuit board 1. By sharing the current in parallel, the total current carrying capacity is improved and the temperature rise of a single inductor is reduced, so as to meet the requirements of photovoltaic energy storage systems or industrial high-current scenarios. Secondly, this design can improve the reliability of the system, and can still maintain part of the power output when a single inductor fails.

[0025] The surface of the circuit board 1 is provided with a first pad 10, a second pad 11, a third pad 12, and a fourth pad 13 respectively; the first pin 4, the second pin 5, the third pin 8, and the fourth pin 9 are soldered to the first pad 10, the second pad 11, the third pad 12, and the fourth pad 13 respectively.

[0026] The inner side of the winding 20 is wound with mica tape 21, and the outer side of the winding 20 is wound with polyimide film 22.

[0027] Specifically, the first magnetic core assembly 3 and the second magnetic core assembly 7 have windings 20 wound on their iron cores, with mica tape 21 wound on the inner side and polyimide film 22 wound on the outer side. This provides good high-temperature resistance and improves insulation and toughness. The mica sheet does not absorb water (water absorption rate <0.1%), is moisture resistant, and has a temperature resistance of over 500℃ (natural mica). It has extremely strong thermal stability, a dielectric strength of 150-200 kV / mm, and excellent arc resistance. Polyimide is solvent resistant and acid and alkali resistant, making it suitable for humid or corrosive environments. The polyimide film has a dielectric strength of up to 200-300 kV / mm, making it suitable for high-frequency and high-voltage scenarios. It is lightweight and flexible (thickness can be as low as 0.025mm), making it easy to wrap complex-shaped windings or magnetic cores. Polyimide has high tensile strength (≥150 MPa), which can withstand winding or vibration stress. The composite insulation scheme of mica tape 21 and polyimide film 22 can balance flexibility and pressure resistance.

[0028] The outer walls on both sides of the first protective cover 2 and the second protective cover 6 are respectively provided with a first opening 18 and a second opening 19; the circuit board 1 at the positions of the first protective cover 2 and the second protective cover 6 is respectively provided with a first heat dissipation window 14 and a second heat dissipation window 15.

[0029] Specifically, by setting a support foot 17 at the bottom of the circuit board 1, a heat dissipation space is formed below the circuit board 1. Combined with the setting of the first heat dissipation window 14 and the second heat dissipation window 15, it is beneficial to dissipate the heat of the first magnetic core assembly 3 and the second magnetic core assembly 7. The setting of the first port 18 and the second port 19 further improves the heat dissipation effect.

[0030] The circuit board 1 has mounting holes 16 on both sides of its surface; a support foot 17 is fixed at the corner of the bottom of the circuit board 1.

[0031] In use, the high-current inverter inductor is firstly composed of a first magnetic core assembly 3 and a second magnetic core assembly 7 of the same model connected in parallel. A first protective cover 2 and a second protective cover 6 are correspondingly provided on the circuit board 1 to protect the first magnetic core assembly 3 and the second magnetic core assembly 7. First pins 4 and 5, third pins 8 and 9 are led out from the first magnetic core assembly 3 and the second magnetic core assembly 7 and are correspondingly soldered to the first pad 10, second pad 11, third pad 12, and fourth pad 13 on the surface of the circuit board 1. By sharing the current in parallel, the total current carrying capacity is improved, and the temperature rise of a single inductor is reduced, thereby meeting the requirements of photovoltaic energy storage systems. In industrial high-current scenarios, this design can improve system reliability, maintaining partial power output even in the event of a single inductor failure. Furthermore, windings 20 are wound around the iron cores of the first magnetic core assembly 3 and the second magnetic core assembly 7, with mica tape 21 wound on the inner side and polyimide film 22 wound on the outer side, providing good high-temperature resistance and improving insulation and toughness. In addition, by setting a support foot 17 at the bottom of the circuit board 1, a heat dissipation space is formed below the circuit board 1. Combined with the setting of the first heat dissipation window 14 and the second heat dissipation window 15, it is beneficial to dissipate heat from the first magnetic core assembly 3 and the second magnetic core assembly 7. The setting of the first port 18 and the second port 19 further improves the heat dissipation effect.

[0032] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A high-current inverter inductor comprising a circuit board (1), characterized in that, The top of the circuit board (1) is fixed with a first protective cover (2) and a second protective cover (6). The first protective cover (2) and the second protective cover (6) are respectively installed with a first magnetic core assembly (3) and a second magnetic core assembly (7). The surface of the first magnetic core assembly (3) is respectively connected with a first pin (4) and a second pin (5). The surface of the second magnetic core assembly (7) is respectively connected with a third pin (8) and a fourth pin (9). The surfaces of the first magnetic core assembly (3) and the second magnetic core assembly (7) are wound with windings (20).

2. The high-current inverter inductor according to claim 1, characterized in that: The surface of the circuit board (1) is provided with a first pad (10), a second pad (11), a third pad (12), and a fourth pad (13).

3. A high-current inverter inductor according to claim 1, characterized in that: The first pin (4), the second pin (5), the third pin (8), and the fourth pin (9) are soldered to the first pad (10), the second pad (11), the third pad (12), and the fourth pad (13) respectively.

4. A high-current inverter inductor according to claim 1, characterized in that: The inner side of the winding (20) is wound with mica tape (21), and the outer side of the winding (20) is wound with polyimide film (22).

5. A high-current inverter inductor according to claim 1, characterized in that: The outer walls on both sides of the first protective cover (2) and the second protective cover (6) are respectively provided with a first opening (18) and a second opening (19).

6. A high-current inverter inductor according to claim 1, characterized in that: The circuit board (1) at the positions of the first protective cover (2) and the second protective cover (6) is provided with a first heat dissipation window (14) and a second heat dissipation window (15), respectively.

7. A high-current inverter inductor according to claim 1, characterized in that: Mounting holes (16) are provided on both sides of the surface of the circuit board (1).

8. A high-current inverter inductor according to claim 1, characterized in that: The circuit board (1) has a support foot (17) fixed at the corner of the bottom.

Images