A high frequency transformer

Abstract

The utility model discloses a high-frequency transformer, including a magnetic core body, the magnetic core body is composed of a left magnetic core body and a right magnetic core body; the left magnetic core body and the right magnetic core body both include a vertical plate portion, the middle of the relative wall surfaces of the two vertical plate portions are formed with relatively extended magnetic core columns, the relative wall surfaces of the top and bottom of the two vertical plate portions are formed with extended plate portions, and the end faces of the two corresponding extended plate portions on the left and right are pressed against each other; there is a gap between the two magnetic core columns, a winding drum is inserted and sleeved on the two magnetic core columns and clamped between the two vertical plate portions, and a plurality of windings are wound on the outer wall of the winding drum; an annular through groove is formed between the inner side wall of the winding drum and the outer side walls of the two magnetic core columns. An annular through groove is formed between the inner side wall of the winding drum and the outer side walls of the two magnetic core columns to improve the heat dissipation effect, and the gap and insulating sheet provided therein realize multi-stage air gaps, further effectively resisting high-frequency noise and interference.

Description

Technical field:

[0001] The utility model relates to the technical field of transformers, and more specifically to a high-frequency transformer. Background technology:

[0002] Existing transformers generally use iron cores, while some high-frequency and high-power transformers use magnetic cores. The main core of the existing magnetic core generally has a fixed frame on which windings are wound. However, the existing frame is tightly attached to the outer wall of the main core, and the gap between the two is relatively small, so the heat dissipation effect is limited. At the same time, the magnetic core of the existing high-frequency transformer generally has only one air gap, so its noise reduction effect is limited. Utility model content:

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a high-frequency transformer, wherein an annular through groove is formed between the inner wall of the winding bobbin and the outer walls of the two magnetic core cylinders to improve the heat dissipation effect, and the gap and insulating sheet provided therein realize multi-stage air gaps to further effectively resist high-frequency noise and interference.

[0004] The solution of the utility model to solve the technical problem is:

[0005] A high-frequency transformer comprises a magnetic core body, wherein the magnetic core body consists of a left magnetic core body and a right magnetic core body;

[0006] The left magnetic core body and the right magnetic core body each include a vertical plate portion, the middle portions of the opposite walls of the two vertical plate portions are formed with relatively extended magnetic core columns, the opposite walls of the top and bottom of the two vertical plate portions are formed with extended plate portions, and the end surfaces of the two corresponding left and right extended plate portions are pressed against each other;

[0007] There is a gap between the two magnetic core columns, the winding drum is inserted into the two magnetic core columns and clamped between the two vertical plate parts, and a plurality of windings are wound on the outer wall of the winding drum;

[0008] An annular through groove is formed between the inner side wall of the winding drum and the outer side walls of the two magnetic core columns.

[0009] The two magnetic core columns have the same cross-section, and the opposite wall surfaces of the two magnetic core columns overlap.

[0010] The magnetic core column of the left magnetic core body is a short column, and the magnetic core column of the right magnetic core body is composed of a plurality of sub-columns, the rightmost sub-column of which is formed on the left wall of the middle part of the vertical plate portion, and an insulating sheet is fixed between each two adjacent sub-columns of the remaining sub-columns. The insulating sheet and the gap are used to form an air gap in the magnetic core body, so that the magnetic permeability of the magnetic core can be reduced, so that it has better noise suppression and overload protection functions in the circuit, more effectively resists high-frequency noise and interference, and ensures circuit stability and reliability.

[0011] The bottom surfaces of the extended plate portions at the bottom of the left magnetic core body and the right magnetic core body are pressed against an insulating bottom plate.

[0012] The outstanding effects of the utility model are:

[0013] An annular through groove is formed between the inner wall of the winding barrel and the outer walls of the two magnetic core columns to improve the heat dissipation effect. The gap and insulating sheet provided therein realize multi-section air gaps to further effectively resist high-frequency noise and interference. Description of the drawings:

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 Schematic diagram of the angle-changing structure;

[0016] Figure 3 It is a partial cross-sectional view of the utility model;

[0017] Figure 4 It is a schematic diagram of the partial structure of the left magnetic core. Specific implementation method:

[0018] For example, see Figures 1 to 4 As shown, a high-frequency transformer includes a magnetic core 10, wherein the magnetic core 10 is composed of a left magnetic core 11 and a right magnetic core 12;

[0019] The left magnetic core body 11 and the right magnetic core body 12 each include a vertical plate portion 13, and a relatively extended magnetic core column 14 is formed in the middle of the opposite wall surfaces of the two vertical plate portions 13, and an extended plate portion 15 is formed on the opposite wall surfaces of the top and bottom of the two vertical plate portions 13, and the end surfaces of the two corresponding extended plate portions 15 on the left and right are pressed against each other;

[0020] The magnetic core column 14 of the left magnetic core body 11 is a short column, and the magnetic core column 14 of the right magnetic core body 12 is composed of a plurality of sub-columns 141, wherein the rightmost sub-column 141 is formed on the left side wall of the middle part of the vertical plate portion 13, and among the remaining sub-columns 141, an insulating sheet 2 is fixed between each two adjacent sub-columns 141, and a gap 1 is provided between the leftmost sub-column 141 and the right end surface of the magnetic core column 14 of the left magnetic core body 11;

[0021] The thickness of the insulating sheet 2 in this embodiment is about 1.2 mm, and the gap 1 and the insulating sheet 2 form an air gap. At the same time, this distance setting can reduce the magnetic permeability of the magnetic core, so that it has better noise suppression and overload protection functions in the circuit, more effectively resists high-frequency noise and interference, and ensures circuit stability and reliability.

[0022] This distance is the air gap spacing, which is very suitable for high-frequency circuits and has better high-frequency characteristics and electromagnetic characteristics.

[0023] Moreover, it can better resist electromagnetic interference and improve the anti-interference ability and reliability of the circuit.

[0024] Furthermore, the bobbin 20 is inserted into the two magnetic core columns 14 and clamped between the two vertical plate portions 13, and a plurality of windings 21 are wound on the outer wall of the bobbin 20;

[0025] An annular through groove 9 is formed between the inner wall of the winding drum 20 and the outer walls of the two magnetic core columns 14. The thickness of the annular through groove 9 is about 1.5 mm, which has a better heat dissipation effect.

[0026] Furthermore, the two magnetic core columns 14 have the same cross-section, and the opposite wall surfaces of the two magnetic core columns 14 overlap.

[0027] Furthermore, the opposite wall surfaces of the two extending plate portions 15 of the vertical plate portion 13 are arc-shaped wall surfaces, and the outer wall surface of the winding 21 is close to the arc-shaped wall surfaces.

[0028] Furthermore, the bottom surfaces of the extension plate portions 15 at the bottom of the left magnetic core body 11 and the right magnetic core body 12 are pressed against the insulating bottom plate 30 .

[0029] Furthermore, the left magnetic core 11 and the right magnetic core 12 are fixed into the magnetic core 10 by the first tape 3 , and the first tape 3 is wound and fixed along the outer wall surfaces of the vertical plate portion 13 and the extension plate portion 15 of the left magnetic core 11 and the right magnetic core 12 .

[0030] The magnetic core 10 and the insulating bottom plate 30 are fixed by the second adhesive tape 4. The second adhesive tape 4 is wound along the side wall and top surface of the magnetic core 10 and the side wall and bottom surface of the insulating bottom plate 30 for fixing.

[0031] The first adhesive tape 3 and the second adhesive tape 4 are both insulating adhesive tapes.

[0032] Furthermore, a plug-in hole 31 is formed at the front or rear of the insulating base plate 30, and an insulating plate 40 is clamped between the bottom surface of the magnetic core body 10 on one side of the plug-in hole 31 and the top surface of the insulating base plate 30. A blocking portion 41 extending vertically upward is formed on one side of the insulating plate 40 extending out of the magnetic core body 10, and the plug-in hole 31 is located on the outside of the blocking portion 41.

[0033] The plug-in through hole 31 can be inserted with a terminal wire, and the terminal wire is electrically connected to the winding 21 .

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high frequency transformer, comprising a magnetic core (10), characterized in that: The magnetic core (10) consists of a left magnetic core (11) and a right magnetic core (12); The left magnetic core body (11) and the right magnetic core body (12) both comprise a vertical plate portion (13), the middle portions of the opposite wall surfaces of the two vertical plate portions (13) are both formed with relatively extended magnetic core columns (14), the top and bottom opposite wall surfaces of the two vertical plate portions (13) are both formed with extended plate portions (15), and the end surfaces of the two corresponding left and right extended plate portions (15) are pressed against each other; There is a gap (1) between the two magnetic core columns (14), a winding bobbin (20) is inserted into the two magnetic core columns (14) and clamped between the two vertical plate portions (13), and a plurality of windings (21) are wound on the outer wall of the winding bobbin (20); An annular through groove (9) is formed between the inner side wall of the winding drum (20) and the outer side walls of the two magnetic core columns (14).

2. A high frequency transformer according to claim 1, characterized in that: The two magnetic core columns (14) have the same cross-section, and the opposite wall surfaces of the two magnetic core columns (14) overlap.

3. A high frequency transformer according to claim 1, characterized in that: The opposing wall surfaces of the two extending plate portions (15) of the vertical plate portion (13) are arc-shaped wall surfaces, and the outer wall surface of the winding (21) is close to the arc-shaped wall surfaces.

4. A high frequency transformer according to claim 1, characterized in that: The magnetic core column (14) of the left magnetic core body (11) is a short column, and the magnetic core column (14) of the right magnetic core body (12) is composed of a plurality of sub-columns (141), wherein the rightmost sub-column (141) is formed on the left side wall of the middle part of the vertical plate portion (13), and among the remaining sub-columns (141), an insulating sheet (2) is fixed between each two adjacent sub-columns (141).

5. A high frequency transformer according to claim 1, characterized in that: The bottom surfaces of the extended plate portions (15) at the bottom of the left magnetic core body (11) and the right magnetic core body (12) are pressed against an insulating bottom plate (30).

6. A high frequency transformer according to claim 5, characterized in that: The left magnetic core (11) and the right magnetic core (12) are fixed to form a magnetic core (10) by a first adhesive tape (3), and the magnetic core (10) and the insulating bottom plate (30) are fixed by a second adhesive tape (4).

7. A high frequency transformer according to claim 5, characterized in that: A plug-in through hole (31) is formed at the front or rear of the insulating bottom plate (30); an insulating plate (40) is sandwiched between the bottom surface of the magnetic core (10) on one side of the plug-in through hole (31) and the top surface of the insulating bottom plate (30); a blocking portion (41) extending vertically upward is formed at one side of the insulating plate (40) extending out of the magnetic core (10); and the plug-in through hole (31) is located outside the blocking portion (41).

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