Resonant transformer

Abstract

The utility model discloses a resonance transformer which comprises a magnetic core assembly, a first winding, a second winding and a third winding. The magnetic core assembly comprises a plurality of polygonal magnetic chips which are sequentially connected in an overlapped mode, then the magnetic core assembly extends in the longitudinal direction and forms a hollow right prism with the polygonal bottom face, and the first winding, the second winding and the third winding are wound around the three side walls of the magnetic core assembly respectively. The first winding, the second winding and the third winding are distributed in an equilateral triangle mode, and therefore the distance between any two of the first winding, the second winding and the third winding is equal. According to the utility model, through the ingenious structural design, the distances between the primary winding and the secondary winding are equal, the coupling performance is good, the purpose of the same leakage inductance is achieved, and the circuit is driven to work; compared with a similar structure in the industry, the leakage inductance can be adjusted without additionally arranging a resonant inductor, the leakage inductance consistency is very good, the technical advantages are achieved, and great market competitiveness is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a resonant transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil, and the iron core (magnetic core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc. The existing single magnetic core is in the shape of a concave letter, with the open sides of the two sets of magnetic cores facing each other. Transformers with this shape of iron core have leakage inductance problems. Leakage inductance is due to the fact that the primary (secondary) magnetic flux is not coupled to the secondary (primary) through the magnetic core, but returns to the primary (secondary) through air closure. That is, the magnetic lines of force generated by the primary coil cannot all pass through the secondary coil, so the inductance that generates leakage magnetic is called leakage inductance, which refers to a part of the magnetic flux that is lost during the primary-secondary coupling process of the transformer.

[0003] In order to solve the above leakage inductance problem, the existing processing method is to add a resonant inductor to adjust the leakage inductance so that the leakage inductance is consistent. However, the added resonant inductor increases the cost of the transformer, has no technical advantages, and is not very competitive in the market. Utility Model Content

[0004] Aiming at the defects in the prior art, the resonant inductor design is cancelled, the consistency of leakage inductance is improved, and the market competitiveness is improved. The utility model provides a resonant transformer, including a magnetic core component, a first winding, a second winding and a third winding; the magnetic core component includes a plurality of polygonal magnetic core pieces which are overlapped and connected in sequence, so that the magnetic core component extends longitudinally and forms a hollow right prism with a polygonal bottom surface, the first winding, the second winding and the third winding are respectively wound on the three side walls of the magnetic core component, and the first winding, the second winding and the third winding are distributed in a regular triangle, so that the spacing between any two of the first winding, the second winding and the third winding is equal.

[0005] The beneficial effects of this device are reflected in: Compared with the existing conventional transformer structure, the distance between the primary and secondary windings is equal through ingenious structural design, that is, the distance between the N1 / N2 / N3 windings is the same, and the distribution of the magnetic lines of force generated will be more symmetrical, so the leakage inductance of N1 / N2 / N3 will be better, and the coupling will be better to achieve the purpose of making the leakage inductance the same, thereby driving the circuit to work. Compared with similar structures in the industry, there is no need to add a resonant inductor to adjust the leakage inductance, and the leakage inductance consistency is very good, which has technical advantages and is very competitive in the market.

[0006] Preferably, all polygonal magnetic core pieces are hexagonal in shape. Each of the polygonal magnetic core pieces includes six V-shaped sides of the same length, and the six V-shaped sides are connected end to end in sequence. One of the two sides of each V-shaped side is longer than the other side, and the angle between the two sides is 120°. The two longer sides of each two adjacent V-shaped sides in each polygonal magnetic core piece are butt-jointed, and the two shorter sides of each two adjacent V-shaped sides are butt-jointed. The two long sides are formed into longer sides, and the first winding, the second winding, and the third winding are all just stuck on the longer sides. The installation position is accurate, the installation error is small, and it is more conducive to the first winding, the second winding, and the third winding to be distributed in a regular triangle, and the coupling is better.

[0007] Preferably, a base is included, and the magnetic core assembly is installed on the base. The base includes a bottom plate and longitudinal columns; three longitudinal columns are arranged on the top of the bottom plate, and the magnetic core assembly is connected to the three longitudinal columns by steel belts, so that the magnetic core assembly is installed on the top of the bottom plate. The three longitudinal columns are all located on the outside of the magnetic core assembly, and the three longitudinal columns are respectively located between the first winding and the second winding, between the second winding and the third winding, and between the first winding and the third winding. The upper end of each longitudinal column is not lower than the upper end of the magnetic core assembly, and a plurality of steel belts are provided, each of which binds the longitudinal column and the magnetic core assembly tightly on the inside, and all the steel belts are distributed at equal intervals along the longitudinal direction. The first winding, the second winding and the third winding are wound around the steel belt and the outside of the magnetic core assembly, so that after the steel belt fixes the magnetic core assembly and the longitudinal columns on the bottom plate, the first winding, the second winding and the third winding are also fixed.

[0008] Preferably, pads supported on the bottom plate are provided below the first winding, the second winding and the third winding. The pads fill the holes between the first winding and the bottom plate, between the second winding and the bottom plate and between the third winding and the bottom plate, so that the first winding, the second winding and the third winding are installed more firmly without shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0010] Figure 1 It is a structural schematic diagram of this embodiment;

[0011] Figure 2 for Figure 1 The three-dimensional Figure 1 ;

[0012] Figure 3 for Figure 1 The three-dimensional Figure 2 ;

[0013] Figure 4 for Figure 1 A schematic diagram showing the first winding, the second winding and the third winding hidden in FIG.

[0014] Figure 5 for Figure 4 Stereoscopic diagram.

[0015] In the accompanying drawings, there are a magnetic core assembly 1, a first winding 2, a second winding 3, a third winding 4, a V-shaped edge 5, a base 6, a bottom plate 7, a longitudinal column 8, a steel belt 9, and a spacer 10. DETAILED DESCRIPTION

[0016] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0017] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0018] like Figure 1 , Figure 2 and Figure 4 As shown, this embodiment provides a resonant transformer, including a magnetic core component 1, a first winding 2, a second winding 3 and a third winding 4; the magnetic core component 1 includes a plurality of polygonal magnetic core pieces that are overlapped and connected in sequence, so that the magnetic core component 1 extends longitudinally and forms a hollow right prism with a polygonal bottom surface. Specifically, the shape of all polygonal magnetic core pieces is hexagonal. Each of the polygonal magnetic core pieces includes six VV-shaped edges 5 of the same length, and the six VV-shaped edges 5 are connected end to end in sequence. One of the two sides of each VV-shaped edge 5 is longer than the other, and the angle between the two sides is 120°. The two longer sides of each two adjacent VV-shaped edges 5 in each polygonal magnetic core piece are butt-jointed, and the two shorter sides of each two adjacent VV-shaped edges 5 are butt-jointed.

[0019] In this embodiment, the first winding 2, the second winding 3 and the third winding 4 are respectively wound on the three side walls of the magnetic core component 1, and the first winding 2, the second winding 3 and the third winding 4 are distributed in an equilateral triangle, so that the spacing between any two of the first winding 2, the second winding 3 and the third winding 4 is equal. The two long sides of each two adjacent VV-shaped edges 5 form a longer side, and the first winding 2, the second winding 3 and the third winding 4 are just stuck on the longer side, the installation position is accurate, the installation error is small, and it is more conducive to the first winding 2, the second winding 3 and the third winding 4 to be distributed in an equilateral triangle, and the coupling is better. In addition, in this embodiment, the two VV-shaped edges 5 of the polygonal magnetic core piece can be combined to form a whole, or the three VV-shaped edges 5 of the polygonal magnetic core piece can be combined to form a whole, which is not limited in this embodiment.

[0020] like Figure 4 and Figure 5 As shown, in order to fix the magnetic core component 1, the first winding 2, the second winding 3 and the third winding 4, this embodiment includes a base 6, and the magnetic core component 1 is installed on the base 6. The base 6 includes a bottom plate 7 and a longitudinal column 8; three longitudinal columns 8 are provided on the top of the bottom plate 7, and the magnetic core component 1 is connected to the three longitudinal columns 8 through a steel belt 9, so that the magnetic core component 1 is installed on the top of the bottom plate 7. The three longitudinal columns 8 are all located on the outside of the magnetic core component 1, and the three longitudinal columns 8 are respectively located between the first winding 2 and the second winding 3, between the second winding 3 and the third winding 4, and between the first winding 2 and the third winding 4. The upper end of each longitudinal column 8 is not lower than the upper end of the magnetic core component 1, and a plurality of steel belts 9 are provided, each of which binds the longitudinal column 8 and the magnetic core component 1 tightly on the inside, and all the steel belts 9 are evenly spaced along the longitudinal direction. The first winding 2, the second winding 3 and the third winding 4 are wound around the steel belt 9 and the outside of the magnetic core assembly 1, so that after the steel belt 9 fixes the magnetic core assembly 1 and the longitudinal column 8 on the base plate 7, the first winding 2, the second winding 3 and the third winding 4 are also fixed.

[0021] In addition, if Figure 2 and Figure 3 As shown, a pad 10 supported on the bottom plate 7 is provided below the first winding 2, below the second winding 3 and below the third winding 4. The pad 10 fills the holes between the first winding 2 and the bottom plate 7, between the second winding 3 and the bottom plate 7 and between the third winding 4 and the bottom plate 7, so that the first winding 2, the second winding 3 and the third winding 4 are installed more firmly without shaking.

[0022] The reasons for canceling the existing resonant inductor design in this embodiment are as follows:

[0023] The first winding 2, the second winding 3 and the third winding 4 are equidistant from each other, forming a regular triangle distribution. The magnetic lines of force generated are distributed symmetrically, so the leakage inductance of N1 / N2 / N3 is more consistent and has better coupling to achieve the purpose of making the leakage inductance the same, thereby driving the circuit to work. Compared with similar structures in the industry, there is no need to add a resonant inductor to adjust the leakage inductance, and the leakage inductance consistency is very good, which has technical advantages and is extremely competitive in the market.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A resonant transformer, characterized in that: It includes a magnetic core component, a first winding, a second winding and a third winding; the magnetic core component includes a plurality of polygonal magnetic core pieces which are overlapped and connected in sequence, so that the magnetic core component extends longitudinally and forms a hollow right prism with a polygonal bottom surface; the first winding, the second winding and the third winding are respectively wound on the three side walls of the magnetic core component, and the first winding, the second winding and the third winding are distributed in a regular triangle, so that the spacing between any two of the first winding, the second winding and the third winding is equal.

2. A resonant transformer according to claim 1, characterized in that: All polygonal core pieces are hexagonal in shape.

3. A resonant transformer according to claim 2, characterized in that: Each of the polygonal magnetic core pieces includes six V-shaped edges of the same length, and the six V-shaped edges are connected end to end in sequence.

4. A resonant transformer according to claim 3, characterized in that: One of the two sides of each V-shaped side is longer than the other side, and the angle between the two sides is 120°.

5. A resonant transformer according to claim 1, characterized in that: It comprises a base, and the magnetic core component is installed on the base.

6. A resonant transformer according to claim 5, characterized in that: The base comprises a bottom plate and longitudinal columns; three longitudinal columns are arranged on the top of the bottom plate, and the magnetic core assembly is connected to the three longitudinal columns through a steel belt, so that the magnetic core assembly is installed on the top of the bottom plate.

7. A resonant transformer according to claim 6, characterized in that: The three longitudinal columns are all located outside the magnetic core component, and the three longitudinal columns are respectively located between the first winding and the second winding, between the second windings and between the third winding, and between the first winding and the third winding.

8. A resonant transformer according to claim 6, characterized in that: Pads supported on the bottom plate are provided below the first winding, below the second winding and below the third winding.

Images