PFC inductor for switching power supply

Abstract

The utility model discloses a PFC (power factor correction) inductor for a switching power supply, which comprises an upper iron core and a lower iron core, the framework is buckled between the upper iron core and the lower iron core; the winding is sleeved on the framework; the side connection type pins are inserted into the framework; and the inserting groove is laterally formed in the bottom face of the framework, one end of the inserting groove penetrates out of the side wall of the framework, and exposed pins are installed in the inserting groove and make contact with the lower iron core. The beneficial effects are that the structure design of the product is optimized, the contact exposed pin with a hidden structure is arranged in the magnetic core, and the magnetic core is in contact with the exposed pin so as to realize the function of direct grounding. In addition, the conductive glue coated between the auxiliary magnetic core and the exposed pin enables the circuit conduction capability between the magnetic core and the exposed pin to be better, the anti-interference capability of a product can be enhanced, the magnetic core fixing effect can be improved in an auxiliary mode, noise is prevented from occurring in the operation process of equipment, meanwhile, the assembly technology is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of PFC inductor manufacturing technology for switching power supplies, and specifically to a PFC inductor for switching power supplies. Background Technology

[0002] The PFC inductor for miniature switching power supplies is a compact yet high-performance electronic component. It utilizes high-quality silicon steel sheets and high-performance magnetic materials, with excellent insulation between windings, providing superior electrical isolation. Its small size and light weight make it easy to install in confined spaces, and it is widely used in electronic equipment, instrumentation, and communication fields, such as laptops, mobile phone chargers, and audio equipment. The PFC inductor for miniature switching power supplies features high efficiency and low loss, enabling stable operation at high frequencies, effectively reducing energy loss and improving equipment energy efficiency. Simultaneously, it possesses excellent anti-interference capabilities, effectively shielding against electromagnetic interference to ensure stable and reliable signal transmission.

[0003] Testing revealed flaws in the current structural design of PFC inductors used in micro switching power supplies. Traditional PFC magnetic shielding is achieved by wrapping copper foil around an iron core, winding leads around pins, and then soldering ground. This design results in a cumbersome manufacturing process, hindering automation and increasing material and labor costs. Furthermore, the copper foil is prone to oxidation, affecting the product's appearance and, in severe cases, compromising the grounding function of the PFC inductor, thus reducing its electromagnetic interference immunity and failing to meet current application requirements. Utility Model Content

[0004] The purpose of this invention is to provide a PFC inductor for switching power supplies to solve the aforementioned problems. This addresses the shortcomings of existing technologies where PFC magnetic shielding is achieved by wrapping a copper foil around an iron core, winding leads around pins, and then soldering grounding. This design results in a cumbersome manufacturing process, hinders automation, and increases material and labor costs. Furthermore, the copper foil is prone to oxidation, affecting the product's appearance and, in severe cases, compromising the grounding function of the PFC inductor in micro-switching power supplies, reducing its electromagnetic interference immunity, and failing to meet current usage requirements. The preferred solution in this invention optimizes the product structure by incorporating a hidden contact pin structure within the magnetic core, achieving direct grounding through contact between the core and the exposed pins. Additionally, the conductive adhesive applied between the core and the exposed pins enhances circuit conductivity, improves interference immunity, and helps fix the core, preventing noise during operation. This simplifies assembly and improves production efficiency, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The PFC inductor for switching power supplies provided by this utility model includes:

[0007] An upper iron core, with a lower iron core fastened and installed below the upper iron core;

[0008] The frame is fastened and installed between the upper and lower iron cores;

[0009] The windings are fitted onto the frame;

[0010] Side-mounted pins that plug into the frame;

[0011] The insertion slot is located on the bottom surface of the frame, with one end extending through the side wall of the frame. An exposed pin is installed in the insertion slot, and the exposed pin contacts the lower iron core.

[0012] Preferably, the upper and lower iron cores are provided with interlocking magnetic core columns.

[0013] Preferably, the frame consists of an upper support plate, a connecting tube, and a lower support plate. The connecting tube is disposed between the upper and lower support plates and is hollow inside to facilitate the insertion and positioning of the magnetic core column.

[0014] Preferably, the top of the upper support plate is provided with a positioning protrusion.

[0015] Preferably, both the upper and lower iron cores have storage grooves at the edges of their inner surfaces to accommodate pin positioning.

[0016] The beneficial effects are:

[0017] By optimizing the product structure design, a hidden contact pin is incorporated inside the magnetic core, allowing for direct grounding through contact between the core and the exposed pin. Furthermore, conductive adhesive applied between the core and the exposed pin enhances circuit conductivity, improving the product's anti-interference capabilities. This also helps secure the core, preventing noise during operation, while simplifying assembly and improving production efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is the explosive structure of the present invention. Figure 1 ;

[0020] Figure 2 This is the explosive structure of the present invention. Figure 2 ;

[0021] Figure 3 This utility model is a three-dimensional structural view. Figure 1 ;

[0022] Figure 4 This utility model is a three-dimensional structural view. Figure 2 .

[0023] The annotations in the attached figures are explained as follows:

[0024] 1. Winding; 2. Side-mounted pins; 3. Core post; 4. Lower core; 5. Storage groove; 6. Exposed pins; 7. Frame; 701. Lower support plate; 702. Connecting tube; 703. Upper support plate; 8. Positioning protrusion; 9. Upper core; 10. Insertion slot. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] See Figures 1-4 As shown, this utility model provides a PFC inductor for a switching power supply, comprising:

[0027] The upper iron core 9 is fastened to the lower iron core 4. The upper iron core 9 and the lower iron core 4 have completely identical structures and are fastened to each other to support and position the central frame 7.

[0028] The skeleton 7 is fastened between the upper iron core 9 and the lower iron core 4. The skeleton 7 is used to cooperate with the winding 1 for winding and positioning, and at the same time provides an installation position for the pins.

[0029] Winding 1 is mounted on frame 7 and is used to facilitate power transmission.

[0030] Side-mounted pins 2 are inserted into the frame 7. The side-mounted pins 2 are arranged at equal intervals on one side of the frame 7 to facilitate circuit conduction and are inserted into subsequent mounting holes.

[0031] The insertion slot 10 is located on the bottom surface of the frame 7, with one end extending through the side wall of the frame 7. An exposed pin 6 is installed in the insertion slot 10, and the exposed pin 6 contacts the lower iron core 4. The insertion slot 10 is located on the bottom surface of the frame 7 to facilitate the horizontal insertion of the exposed pin 6 and its contact with the lower iron core 4 for grounding.

[0032] During installation, the orientation of the upper iron core 9 and the lower iron core 4 is adjusted by a vibratory feeder to facilitate conveying and positioning. Then, the robotic arm clamps the upper iron core 9 and the lower iron core 4 respectively, moves them, and places them at the installation station for positioning. At the same time, the external robotic arm places the frame 7 after the winding 1 is completed between the upper iron core 9 and the lower iron core 4, and presses it into the frame 7 for fixation. Finally, the assembled upper iron core 9 and the lower iron core 4 are coated with glue, thus completing the installation process of the PFC inductor for the micro switching power supply.

[0033] In another embodiment, the upper iron core 9 and the lower iron core 4 are provided with interlocking magnetic core columns 3, wherein the cooperation between the upper iron core 9 and the lower iron core 4 can realize the positioning and installation of the frame 7.

[0034] In another embodiment, the frame 7 is composed of an upper support plate 703, a connecting pipe 702, and a lower support plate 701. The connecting pipe 702 is disposed between the upper support plate 703 and the lower support plate 701. The connecting pipe 702 is hollow inside to facilitate the insertion and positioning of the magnetic core post 3. The insertion groove 10 is laterally opened on the side wall of the lower support plate 701 to facilitate the lateral insertion of the exposed pin 6. At the same time, the insertion groove 10 extends into the bottom plane of the lower support plate 701, so that the exposed pin 6 can contact the lower iron core 4 below the lower support plate 701, thereby realizing the function of automatic grounding. In addition, conductive adhesive is applied between the exposed pin 6 and the magnetic core to improve conductivity.

[0035] In another embodiment, the top of the upper support plate is provided with a positioning protrusion 8. The positioning protrusion 8 is designed to facilitate the differentiation of the front and back of the frame 7, thereby improving assembly efficiency and quality. The surface of the upper support plate is also provided with a numerical marking to facilitate the identification of the product model and to meet subsequent assembly needs, thereby improving installation efficiency.

[0036] In another embodiment, storage grooves 5 for positioning the pins are provided on the inner surface edges of both the upper core 9 and the lower core 4. The storage grooves 5 correspond to the positions of the exposed pins 6. In order to improve product assembly efficiency and shorten the corresponding process time, the upper core 9 and the lower core 4 are designed to have completely identical structures. However, when the side-mounted pin 2 is installed in the lower support plate, its bottom surface is lower than the bottom surface of the lower support plate. Therefore, storage grooves 5 are provided on the upper core 9 and the lower core 4 to meet the positioning requirements during pin installation.

[0037] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A PFC inductor for a switching power supply, characterized in that: include: Upper iron core (9), and a lower iron core (4) is fastened and installed below the upper iron core (9); The frame (7) is fastened and installed between the upper iron core (9) and the lower iron core (4); The winding (1) is fitted onto the frame (7); Side-mounted pins (2) are inserted into the skeleton (7); The insertion slot (10) is located on the bottom surface of the frame (7), with one end extending through the side wall of the frame (7). An exposed pin (6) is installed in the insertion slot (10), and the exposed pin (6) contacts the lower iron core (4).

2. The PFC inductor for a switching power supply according to claim 1, characterized in that: The upper iron core (9) and the lower iron core (4) are provided with interlocking magnetic core columns (3).

3. The PFC inductor for a switching power supply according to claim 2, characterized in that: The frame (7) consists of an upper support plate (703), a connecting pipe (702) and a lower support plate (701). The connecting pipe (702) is located between the upper support plate (703) and the lower support plate (701). The connecting pipe (702) is hollow inside so as to facilitate the insertion and positioning of the magnetic core column (3).

4. The PFC inductor for a switching power supply according to claim 3, characterized in that: The top of the upper support plate (703) is provided with a positioning protrusion (8).

5. The PFC inductor for a switching power supply according to claim 1, characterized in that: The inner surface edges of the upper iron core (9) and the lower iron core (4) are provided with storage grooves (5) for positioning with the pins.

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