CN204066936U - A kind of exoskeletal self-cooling high-frequency Switching Power Supply secondary inductance - Google Patents

Abstract

The utility model provides exoskeletal self-cooling high-frequency Switching Power Supply secondary inductance described in a kind of exoskeletal self-cooling high-frequency Switching Power Supply secondary inductance and comprises iron core, two groups of copper strips, input end tab, export end tab, insulating paper and two epoxy plate cushion blocks, described iron core is an O type magnet ring combined by two C shaped iron cores, often organize the equal rivet welding in one end of described copper strips on described input end tab, two outer surfaces often organizing described copper strips are all covered with insulating paper, the one end often organizing described copper strips all penetrates from the center of described iron core and is surrounded on a side arm described iron core two C type side arms respectively, and stretch out the respective other end respectively, mutually and merge rivet welding on described output end tab, described two epoxy plate cushion blocks are installed in two medial surfaces of described O type magnet ring to the other end of copper strips described in two groups respectively.The utility model has that induction structure is compact, heating less, good heat dissipation effect, easily install, the advantage that safe and reliable, performance is good.

Description

A frameless self-cooling high-frequency switching power supply secondary inductor

technical field

The utility model belongs to the technical field of high-frequency switching power supply, in particular relates to a secondary inductor for medium and high-power high-frequency switching power supply.

Background technique

Large and medium power switching power supplies are widely used in the industrial field. As an indispensable auxiliary component of switching power supplies, the performance of secondary inductors directly affects the quality of power supply output from high-frequency switching power supplies to the load. The secondary inductance can make most of the harmonic voltage output by the high-frequency switching power supply drop to the secondary inductance, so that the harmonic voltage on the load is very small, and there is almost no harmonic current on the load.

At present, the commonly used secondary inductors use multi-strand enameled wires to wind on the skeleton, which cannot be wound more due to the window of the iron core, resulting in insufficient inductance, sacrificing the output performance of high-frequency switching power supply, or reducing multi-strand enameled wires in order to meet the inductance The number of strands has caused serious defects in the secondary inductor heating.

Utility model content

In order to solve the shortcomings of the above-mentioned prior art, the purpose of this utility model is to provide a secondary inductor of a skeletonless self-cooling high-frequency switching power supply. The input and output lead-out boards of the system improve the heat dissipation effect of the secondary inductance, so as to overcome the defects in the prior art.

In order to achieve the above purpose, the utility model provides a skeletonless self-cooling high-frequency switching power supply secondary inductance, the skeletonless self-cooling high-frequency switching power supply secondary inductor includes an iron core, two sets of copper strips, input lead-out board, output lead-out board, insulating paper and two epoxy board pads, wherein the iron core is an O-shaped magnetic ring composed of two C-shaped iron cores, and one end of each set of copper strips is riveted The two outer surfaces of each set of copper strips welded on the input and output boards are covered with insulating paper, and one end of each set of copper strips penetrates from the center of the iron core and wraps around the on one of the two side arms of the iron core, and protrude the other end respectively; The plate spacers are clamped on the two inner sides of the O-shaped magnetic ring formed by the two C-shaped iron cores, so as to separate the sides of each group of copper strips from the iron core.

As a further description of the secondary inductor of the frameless self-cooling high-frequency switching power supply of the present invention, preferably, the iron core is made of nanocrystalline, amorphous or ferrite.

As a further description of the frameless self-cooling high-frequency switching power supply secondary inductor of the present invention, preferably, the copper strip is formed by stacking copper skin or multiple layers of copper foil.

As a further description of the secondary inductor of the frameless self-cooling high-frequency switching power supply of the present invention, preferably, the width of the copper strip is smaller than the width of the insulating paper.

As a further description of the secondary inductor of the frameless self-cooling high-frequency switching power supply of the present invention, preferably, the copper strip is riveted to the input lead-out plate and the output lead-out plate through copper rivets.

As a further description of the secondary inductor of the frameless self-cooling high-frequency switching power supply of the present invention, preferably, both the input lead-out plate and the output lead-out plate are made of copper plates. Therefore, since the secondary inductor of the utility model frameless self-cooling high-frequency switching power supply adopts a frameless structure, in the case of the same iron core, the number of coils can be increased to increase the inductance or increase the thickness of the copper strip. It can increase the carrying capacity and reduce the current density, reduce the volume of the inductor, and reduce the heat generation. It has the advantages of compact structure, less heat generation, good heat dissipation effect, easy installation, safety and reliability, and good performance.

Description of drawings

Fig. 1 is a schematic diagram of the decomposition structure of the secondary inductance of the frameworkless self-cooling high-frequency switching power supply of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of the secondary inductor of the frameless self-cooling high-frequency switching power supply of the present invention.

Explanation of drawings and symbols:

Copper rivet 1, input lead-out plate 2, copper strip 3, output lead-out plate 4, iron core 5, epoxy plate spacer 6, insulating paper 10, side arm 11, side arm 12.

Detailed ways

In order to enable the examiner to further understand the structure, features and other purposes of the utility model, the attached preferred embodiments are attached with accompanying drawings in detail as follows. The embodiments illustrated in the accompanying drawings are only used to illustrate the utility model The technical solution does not limit the utility model.

First of all, please refer to Figure 1 and Figure 2 at the same time, Figure 1 is a schematic diagram of the decomposition structure of the secondary inductor of the frameless self-cooling high-frequency switching power supply of the present invention, and Figure 2 is the frameless self-cooling high-frequency switch of the present invention Schematic diagram of the cross-sectional structure of the secondary inductor of the power supply. As shown in Figure 1 and Figure 2, the secondary inductance of the frameless self-cooling high-frequency switching power supply of the present invention includes copper rivets 1, input lead-out plate 2, copper strip 3, output lead-out plate 4, iron core 5, epoxy Board spacer 6, insulating paper 10, side arm 11 and side arm 12.

Wherein, the iron core 5 is an O-shaped magnetic ring composed of two C-shaped iron cores, and the material of the iron core 5 can be various materials such as nanocrystalline, amorphous or ferrite.

One end of each group of copper strips 3 is riveted and welded on the input and output plate 2 through copper rivets 1, the two outer surfaces of each group of copper strips 3 are covered with insulating paper 10, and one end of each group of copper strips 3 is connected from the iron core The center of 5 penetrates and wraps around one of the two side arms 11 and 12 of the iron core 5 respectively, and protrudes from the other end respectively. The other ends of the two groups of copper strips 3 merge with each other and pass through The copper rivet 1 is riveted and welded on the output lead-out plate 4 .

In the present utility model, the copper strip 3 is formed by stacking copper skin or multi-layer copper foil, and the width of the copper strip 3 is smaller than the width of the insulating paper 10, that is, in addition to the copper strip 3 and the input lead-out plate 2, the output lead-out plate 4 Outside the two connected ends, the insulating paper 10 can completely wrap the copper strip 3 , so that no frame is needed, and the copper strip 3 is directly wound on the two side arms 11 and 12 of the iron core 5 . Two epoxy board pads 6 are respectively clamped on the two inner sides of the O-shaped magnetic ring formed by two C-shaped iron cores, thereby separating the sides of each group of copper strips 3 from the iron core 5, The insulation is strengthened, and the insulation problem caused by the lack of a skeleton is avoided.

In addition, in terms of materials, the temperature resistance of the insulating paper 10 of the present invention must meet the requirement that the insulating paper 10 will not be damaged when welding the ends. At the same time, both the input lead-out plate 2 and the output lead-out plate 4 are made of copper plates with good thermal conductivity.

It can be seen that the secondary inductance of the skeletonless self-cooling high-frequency switching power supply of the present invention is improved by using copper strips instead of enameled wires, and riveting the copper strips on the large-area copper input and output lead-out plates. The heat dissipation effect of the inductor, in the case of the same iron core, can increase the number of coils to increase the inductance or increase the thickness of the copper strip to increase the carrying capacity and reduce the current density, which reduces the volume of the inductor and reduces the power generation. Heat, with the advantages of compact inductor structure, less heat generation, good heat dissipation effect, easy installation, safety and reliability, and good performance.

It should be declared that the content of the above utility model and specific implementation methods are intended to prove the practical application of the technical solutions provided by the utility model, and should not be interpreted as limiting the scope of protection of the utility model. Those skilled in the art may make various modifications, equivalent replacements or improvements within the spirit and principle of the present utility model. The scope of protection of the utility model shall be determined by the appended claims.

Claims (6)

1. A frameless self-cooling type high-frequency switching power supply secondary inductance is characterized in that: the frameless self-cooling type high-frequency switching power supply secondary inductance comprises iron core (5), two groups of copper strips (3), Input lead-out plate (2), output lead-out plate (4), insulating paper (10) and two epoxy board pads (6), wherein, the described iron core (5) is formed by the combination of two C-type iron cores One end of each group of copper strips (3) is riveted and welded on the input and output board (2), and the two outer surfaces of each group of copper strips (3) are covered with insulating paper (10). One end of each group of copper strips (3) passes through the center of the iron core (5) and wraps around one of the two side arms of the iron core (5) respectively, and stretches out the other end respectively; The other ends of the group of copper strips (3) are combined and riveted to the output lead-out plate (4), and the two epoxy board spacers (6) are respectively clamped on the O-shaped iron core composed of two C-shaped iron cores. The two inner sides of the magnetic ring are separated from the iron core (5) by the sides of each group of copper strips (3). the 2. The skeletonless self-cooling secondary inductor of high-frequency switching power supply according to claim 1, characterized in that: the iron core (5) is made of nanocrystalline, amorphous or ferrite. the 3. The skeletonless self-cooling secondary inductor of high-frequency switching power supply according to claim 1, characterized in that: the copper strip (3) is made of copper skin or multi-layer copper foil. the 4. The frameless self-cooling secondary inductor of high-frequency switching power supply according to claim 3, characterized in that the width of the copper strip (3) is smaller than the width of the insulating paper (10). the 5. The skeletonless self-cooling high-frequency switching power supply secondary inductor according to claim 3, characterized in that: the copper strip (3) is riveted and welded to the input lead-out plate (2) and the output lead-out plate through copper rivets (1) (4) up. the 6. The frameless self-cooling secondary inductor of high-frequency switching power supply according to claim 1, characterized in that: both the input lead-out plate (2) and the output lead-out plate (4) are made of copper plates. the