High-frequency transformer with low-voltage and high-current output
By using an inner and outer copper busbar sleeve to wrap the primary coil, the problems of low winding utilization, heat generation, and electromagnetic interference in high-frequency transformers under high current output are solved, achieving efficient power conversion and good heat dissipation, and simplifying the connection process.
Patent Information
- Application Number
- CN202422850759.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing high-frequency transformers suffer from low winding conductor utilization, severe heat generation, difficulty in heat dissipation, and significant electromagnetic interference when outputting high current. Furthermore, the winding connections are complex, making it difficult to meet the requirements for efficient power conversion and electromagnetic shielding.
The primary coil is wrapped with inner and outer copper busbar sleeves. The inner and outer copper busbar sleeves serve as the secondary coils, achieving good coupling and heat dissipation of the windings. The outer copper busbar sleeve and the copper busbar support are integrally formed, integrating the magnetic core and output inductor, simplifying the connection.
It improves power conversion efficiency, reduces high-frequency noise radiation, enhances heat dissipation, simplifies winding connections, and reduces heat loss, making it suitable for widespread application.
Smart Images
Figure CN223566406U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transformer technical field especially relates to low voltage high current output's high frequency transformer. BACKGROUND
[0002] High frequency transformer as one of switching power supply's main devices, it plays the role of electrical isolation, voltage conversion and energy transmission, its design scheme has the vital influence to power output quality, reliability, conversion efficiency and the degree of external electromagnetic interference to many aspects performance, with the increase of power output power, the output current is bigger, the design difficulty of transformer increases, on the one hand due to high frequency skin effect, winding's proximity effect etc., lead to the current carrying capacity utilization rate of winding wire to reduce, wire package heating seriously influence reliability, also reduced the conversion efficiency of transformer, on the other hand, the electromagnetic interference generated to outside also increases greatly along with the increase of current, in the common transformer design of prior art, in order to increase the output side current when ensuring that temperature is not too high, it can need to adopt more multi-strand copper wire winding parallel connection to the output electrode, this scheme increases the connection difficulty between winding and electrode, and winding winding process is complex, and itself is difficult to achieve better electromagnetic shielding, due to the limitation of the size of the winding space, the output current capacity also has greater limitation, multiple winding extrusion together heat dissipation difficulty, when the load increases, the temperature is often difficult to control, the primary and secondary coupling is poor, and the loss is also large. SUMMARY
[0003] In view of the defects in the prior art, the utility model discloses a kind of low voltage high current output's high frequency transformer, adopt and set in the two vice coil between the inner copper row cover and outer copper row cover of primary high voltage wire package, high frequency wire package is fully wrapped in by inner copper row cover and outer copper row cover as two vice coil, the structure of transformer is simple and compact, coupling between primary and secondary coil is good, power conversion efficiency is high, and with good heat dissipation performance, therefore, it is suitable for wide promotion.
[0004] The utility model provides a kind of low voltage high current output's high frequency transformer, comprising: inner copper row cover, outer copper row cover and primary coil are arranged coaxially inside and outside;The inner copper row cover, inside cavity extends along the axial direction, for accommodating transformer magnetic core;The outer copper row cover is set on the inner copper row cover along the axial direction;The primary coil is arranged between the inner copper row cover and outer copper row cover, and is insulated and isolated with inner copper row cover and outer copper row cover respectively, wherein, the inner copper row cover and outer copper row cover are all vice coil of high frequency transformer.
[0005] As a further limitation of this utility model, the inner copper busbar sleeve includes: first to fourth inner copper plates connected in sequence, the first and third inner copper plates, and the second and fourth inner copper plates being arranged in parallel to each other; the outer copper busbar sleeve includes: first to fourth outer copper plates connected in sequence, the first and third outer copper plates, and the second and fourth outer copper plates being arranged in parallel to each other; wherein, the inner copper busbar sleeve is located inside the outer copper busbar sleeve.
[0006] As a further limitation of this utility model, the lower edge of the fourth inner copper plate of the inner copper busbar sleeve is bent at 90 degrees and extended towards the second inner copper plate to form an inner tap copper busbar; the lower edge of the first outer copper plate of the outer copper busbar sleeve is bent at 90 degrees and extended away from the third outer copper plate to form an outer tap copper busbar; both the inner tap copper busbar and the outer tap copper busbar are the center tap leads of the secondary coil.
[0007] As a further limitation of this utility model, the cross-section of the inner tap copper busbar is approximately U-shaped, with the opening of the U-shape facing the extension direction of the outer tap copper busbar of the outer copper busbar sleeve; the two ends of the bottom edge of the U-shape extend outward and protrude beyond the outer sides of the two ends of the inner copper busbar sleeve, and the width of the extended bottom edge is basically the same as the width of the outer tap copper busbar of the outer copper busbar sleeve; the far edges of the two sides of the U-shape are basically flush with the outer edges of the outer tap copper busbar of the outer copper busbar sleeve; wherein, the through holes on the two sides of the U-shape of the inner tap copper busbar and the screw holes on the two ends of the outer tap copper busbar of the outer copper busbar sleeve are electrically connected to the inner tap copper busbar and the outer tap copper busbar by bolts.
[0008] As a further limitation of this utility model, one end of the first inner copper plate of the inner copper busbar sleeve extends outward from the outer side of the inner copper busbar sleeve, parallel to the axis of the inner copper busbar sleeve; the first busbar includes: a first horizontal segment extending outward from one end of the first inner copper plate; a first vertical segment extending outward from the outer side of the first horizontal segment and bent downward at 90 degrees; and a second horizontal segment extending outward from the lower end of the first vertical segment by bending outward at 90 degrees, and the second horizontal segment is substantially parallel to the first horizontal segment; one end of the fourth outer copper plate of the outer copper busbar sleeve is parallel to the outer copper busbar sleeve. A second busbar extends outward from the outer side of the outer copper busbar along the axis of the bushing. The second busbar includes: a third horizontal section extending outward from one end of the fourth outer copper plate; a second vertical section extending downward at a 90-degree angle along the outer side of the third horizontal section; and a fourth horizontal section extending outward at a 90-degree angle along the lower end of the second vertical section, with the fourth horizontal section being substantially parallel to the third horizontal section. The second horizontal section of the first busbar forms the output terminal of the secondary coil of the high-frequency transformer, and the fourth horizontal section of the second busbar forms the other output terminal of the secondary coil of the high-frequency transformer.
[0009] As a further limitation of the utility model, the two ends of the third inner copper plate of the inner copper bar sleeve, the copper plate extension part extending outward respectively, are used for installing temperature sensing switches.
[0010] As a further limitation of the utility model, the utility model further comprises a copper bar support in the shape of a Chinese character 'er', which is electrically connected with the tap copper bar of the secondary coil of the high-frequency transformer and is used for installing the magnetic core of the output inductor, and comprises a first vertical copper bar, a second vertical copper bar, a first horizontal copper bar and a second horizontal copper bar.
[0011] As a further limitation of the utility model, the first vertical copper bar, the second vertical copper bar and the first horizontal copper bar have the same width size, and the first vertical copper bar and the second vertical copper bar have the same height size.
[0012] As a further limitation of the utility model, the first to fourth outer copper plates of the outer copper bar sleeve, the outer tap copper bar, the second bus bar and the first vertical copper bar, the second vertical copper bar, the first horizontal copper bar and the second horizontal copper bar of the copper bar support are integrally formed.
[0013] As a further limitation of the utility model, the first to fourth inner copper plates of the inner copper bar sleeve, the inner tap copper bar and the first bus bar are integrally formed.
[0014] The high-frequency transformer with low-voltage and large-current output provided by the utility model has the following technical effects:
[0015] 1. The primary high-voltage wire package is arranged between the two secondary coils of the inner copper bar sleeve and the outer copper bar sleeve, which realizes good coupling of the primary and secondary windings, reduces the reduction of utilization rate of the wire caused by the proximity effect under high-frequency conditions, and improves the power conversion efficiency.
[0016] 2. The inner and outer copper bar sleeves are used as the secondary coil, which is beneficial to the rapid conduction of the heat generated by the high-frequency transformer to the outside, and therefore the heat dissipation is good.
[0017] 3. The inner copper bar sleeve is used as a secondary coil (output winding) of the high-frequency transformer, and also replaces the traditional transformer coil framework, which facilitates the winding of the high-voltage winding wire package on the surface of the inner copper bar sleeve.
[0018] 4. The outer copper bar sleeve and the copper bar support adopt an integrated structure, the transformer magnetic core and the output inductance magnetic core are installed on the integrated outer copper bar sleeve, the integrated design of the transformer and the output filter inductance is realized, the assembly and connection process of the output large current wire is reduced, and the heat loss caused by the contact resistance of the additional connection end point is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0020] Figure 1 is a structural schematic view of the embodiment 1 of the present application;
[0021] Figure 2 is a second structural schematic view of the embodiment 1 of the present application;
[0022] Figure 3 is a third structural schematic view of the embodiment 1 of the present application;
[0023] Figure 4 is an exploded structural schematic view of the embodiment 1 of the present application;
[0024] Figure 5 is a structural schematic view of the inner copper bar sleeve and the primary coil of the embodiment 1 of the present application;
[0025] Figure 6 is a structural schematic view of the inner copper bar sleeve of the embodiment 1 of the present application;
[0026] Figure 7 is another perspective structural schematic view of the inner copper bar sleeve of the embodiment 1 of the present application;
[0027] Figure 8 is a structural schematic view of the outer copper bar sleeve of the embodiment 1 of the present application;
[0028] Figure 9 is another perspective structural schematic view of the outer copper bar sleeve of the embodiment 1 of the present application;
[0029] Figure 10 is a circuit principle diagram of the embodiment 1 of the present application;
[0030] Figure 11 is a structural schematic view of the embodiment 2 of the present application;
[0031] Figure 12Is the structural schematic diagram of the embodiment 3 of the utility model.
[0032] Reference signs:
[0033] Inner copper bar sleeve 1;Cavity 11;First inner copper plate 12;Second inner copper plate 13;Third inner copper plate 14;Copper plate extension 14a;Fourth inner copper plate 15;Inner tap copper bar 16;Bottom edge 16a;Side edge 16b;First busbar 17;First horizontal section 17a;First vertical section 17b;Second horizontal section 17c;
[0034] Outer copper bar sleeve 2;First outer copper plate 21;Second outer copper plate 22;Third outer copper plate 23;Fourth outer copper plate 24;Outer tap copper bar 25;Second busbar 26;Third horizontal section 26a;Second vertical section 26b;Fourth horizontal section 26c;Copper bar support 27;First vertical copper bar 27a;Second vertical copper bar 27c;First horizontal copper bar 27c;Second horizontal copper bar 27d;
[0035] Transformer magnetic core 3;
[0036] Inductance magnetic core 4;
[0037] Primary coil 5. Specific implementation
[0038] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.
[0039] Embodiment 1
[0040] Please see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 10As shown, the high-frequency transformer with low-voltage and large-current output provided by the embodiment comprises an inner copper bar sleeve 1, an outer copper bar sleeve 2 and a primary winding 5 arranged coaxially. The inner copper bar sleeve 1 has a cavity 11 with two open ends extending along the axial line a-a, and the cavity 11 is used to accommodate a transformer magnetic core 3. The transformer magnetic core 3 is composed of two EE ferrite magnetic cores, and the inner copper bar sleeve 1 is arranged around the inner magnetic column of the EE ferrite magnetic core. The outer copper bar sleeve 2 is arranged outside the inner copper bar sleeve 1 along the axial line a-a, and the inner wall of the outer copper bar sleeve 2 and the outer wall of the inner copper bar sleeve 1 have a gap. The primary winding 5 is arranged in the gap between the inner copper bar sleeve 1 and the outer copper bar sleeve 2, and the primary winding 5 is insulated from the inner copper bar sleeve 1 and the outer copper bar sleeve 2. The inner copper bar sleeve 1 and the outer copper bar sleeve 2 are both made of copper plates subjected to anti-oxidation treatment, and are used as two secondary windings of the high-frequency transformer to form a full-wave rectification output side.
[0041] The primary winding 5 is wound on the inner copper bar sleeve 1, and the inner copper bar sleeve 1 and the outer copper bar sleeve 2 are arranged inside and outside the primary winding 5 to wrap the primary winding 5. On the one hand, this is conducive to the good coupling of the primary winding and the secondary winding, reduces the utilization reduction of the wire caused by the proximity effect under high-frequency conditions, and improves the power conversion efficiency. On the other hand, since the primary winding 5 is wrapped by the inner copper bar sleeve 1 and the outer copper bar sleeve 2, the radiation interference of high-frequency switching noise to the outside is effectively reduced. The current of the inner copper bar sleeve 1 and the outer copper bar sleeve 2 as the output secondary winding is a direct current after rectification by a rectifier diode, and has small external interference and shielding effect on internal high-frequency signals.
[0042] As shown in Figure 6 and Figure 7 is a structural schematic diagram of the inner copper bar sleeve 1. The inner copper bar sleeve 1 comprises first to fourth inner copper plates connected in sequence, and the first and third inner copper plates and the second and fourth inner copper plates are arranged in parallel with each other. The cross section of the first to fourth inner copper plates is approximately in the shape of a mouth. Specifically, the first inner copper plate 12 is located at the bottom of the inner copper bar sleeve 1, and one side of the first inner copper plate 12 is bent upward by 90 degrees and extends to form the second inner copper plate 13. The upper side of the second inner copper plate 13 is bent inward by 90 degrees and extends to form the third inner copper plate 14, which is parallel to the first inner copper plate 12. The side of the third inner copper plate 14 away from the second inner copper plate 13 is bent downward by 90 degrees and extends to form the fourth inner copper plate 15, which is parallel to the second inner copper plate 13. Therefore, the first inner copper plate 12, the second inner copper plate 13, the third inner copper plate 14 and the fourth inner copper plate 15 form a square tube structure with two open ends.
[0043] At the lower edge of the fourth inner copper plate 15 of the inner copper bar sleeve 1, bend 90 degrees and extend to form an inner tap copper bar 16 in the direction of the second inner copper plate 13, which is used as the center tap lead-out end of the inner copper bar sleeve 1 as the secondary coil. Specifically, the cross section of the inner tap copper bar 16 is approximately U-shaped, the two ends of the bottom edge 16a of the U-shaped extend outward respectively, and extend outside the two ends of the inner copper bar sleeve 1, and the two side edges 16b at the two ends of the bottom edge 16a are located outside the two ends of the inner copper bar sleeve 1, and a plurality of through holes are distributed on the two side edges 16b.
[0044] As shown in Figure 6 , the two ends of the third inner copper plate 14 of the inner copper bar sleeve 1 extend outward respectively, and the copper plate extension 14a can be installed with a temperature sensing switch for temperature rise protection of the transformer, which is a common technology and will not be described again.
[0045] As shown in Figure 7 , one end of the first inner copper plate 13 of the inner copper bar sleeve 1 is provided with a first bus bar 17 outside the inner copper bar sleeve 1 parallel to the axial direction of the inner copper bar sleeve 1. Specifically, the first bus bar 17 includes: a first horizontal section 17a extending outward along one end of the first inner copper plate 12, a first vertical section 17b extending 90 degrees downward along the outside of the first horizontal section 17a, and a second horizontal section 17c extending outward 90 degrees outward along the lower end of the first vertical section 17b, and the second horizontal section 17c is substantially parallel to the first horizontal section 17a, and a plurality of external connection holes are provided on the second horizontal section 17c, and the second horizontal section 17c forms the output end of the secondary coil of the high-frequency transformer.
[0046] As shown in Figure 8 and Figure 9 , the outer copper bar sleeve 2 includes: first to fourth outer copper plates connected in sequence, the first and third outer copper plates, and the second and fourth outer copper plates arranged in parallel with each other, and the cross section of the first to fourth outer copper plates is approximately in the shape of a mouth. Specifically, the first outer copper plate 21 of the outer copper bar sleeve 2 is arranged in parallel with the second inner copper plate 13 of the inner copper bar sleeve 1, and the upper side of the first outer copper plate 21 bends 90 degrees inward and extends to form the second outer copper plate 22; the side of the second outer copper plate 22 away from the first outer copper plate 21 bends 90 degrees downward and extends to form the third outer copper plate 23; and the lower side of the third outer copper plate 23 bends 90 degrees and extends to form the fourth outer copper plate 24 in the direction of the first outer copper plate 21. Thus, the first to fourth outer copper plates are bent multiple times to form a square tube structure with open ends.
[0047] From the lower side of the first outer copper plate 21 of the outer copper bar sleeve 2, the outer tap copper bar 25 is formed by bending outwardly 90 degrees and extending away from the third outer copper plate 23, which is used as the center tap lead-out end of the outer copper bar sleeve 2 as the secondary coil. The outer tap copper bar 25 has a plurality of openings at both ends, which correspond to the through holes of the side edges 16b of the U-shaped inner tap copper bar 16 of the inner copper bar sleeve 1. The outer tap copper bar 25 and the inner tap copper bar 16 are electrically connected by bolts.
[0048] As shown in Figure 8 , along one end of the fourth outer copper plate 24 of the outer copper bar sleeve 2, the second bus bar 26 is extended outside the outer copper bar sleeve 2 in parallel to the axis a-a of the outer copper bar sleeve 2, forming another output end of the secondary coil of the high-frequency transformer. Specifically, the second bus bar 26 includes: a third horizontal segment 26a extending outwardly along one end of the fourth outer copper plate 24, a second vertical segment 26b extending downwardly 90 degrees and extending outwardly along the outside of the third horizontal segment 26a; and a fourth horizontal segment 26c extending outwardly 90 degrees and extending outwardly along the lower end of the second vertical segment 26b, and the fourth horizontal segment 26c is substantially parallel to the third horizontal segment 26a. A plurality of connecting screw holes are provided on the fourth horizontal segment 26c.
[0049] As shown in Figure 2 , Figure 4 , Figure 6 and Figure 8 , the U-shaped opening of the inner tap copper bar 16 of the inner copper bar sleeve 1 faces the extending direction of the outer tap copper bar 25 of the outer copper bar sleeve 2; the two ends of the bottom edge 16a of the U-shaped opening extend outwardly and extend outside the two ends of the inner copper bar sleeve 1, and the width of the extended bottom edge 16a is substantially the same as the width of the outer tap copper bar 25 of the outer copper bar sleeve 2; the distal edges of the two side edges 16b of the U-shaped opening are substantially flush with the outer edges of the outer tap copper bar 25 of the outer copper bar sleeve 2; wherein the inner copper bar sleeve 1 is located inside the outer copper bar sleeve 2, and the longitudinal section forms a back-to-back structure.
[0050] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9As shown, the high-frequency transformer further comprises a copper bar support 27 in the shape of a Chinese character and integrally formed with the outer tap copper bar 25 of the outer copper bar sleeve 2 of the high-frequency transformer. Specifically, the copper bar support 27 comprises a first vertical copper bar 27a, a second vertical copper bar 27b, a first horizontal copper bar 27c and a second horizontal copper bar 27d. The lower end of the first vertical copper bar 27a is connected to the outer side of the outer tap copper bar 25 of the outer copper bar sleeve 2, the upper end of the first vertical copper bar 27a is connected to one end of the first horizontal copper bar 27c, the other end of the first horizontal copper bar 27c is connected to the upper end of the second vertical copper bar 27b, the lower end of the second vertical copper bar 27b is connected to one end of the second horizontal copper bar 27d, and the other end of the second horizontal copper bar 27d is connected to the positive output end of the high-frequency transformer. The first vertical copper bar 27a, the second vertical copper bar 27b and the first horizontal copper bar 27c have the same width, and the first vertical copper bar 27a and the second vertical copper bar 27b have the same height. The first vertical copper bar 27a is sleeved with the inductance magnetic core 4.
[0051] It should be noted that in the embodiment, the first outer copper plate 21, the second outer copper plate 22, the third outer copper plate 23 and the fourth outer copper plate 24 of the outer copper bar sleeve 2, the outer tap copper bar 25 and the second bus bar 26, and the first vertical copper bar 27a, the second vertical copper bar 27b, the first horizontal copper bar 27c and the second horizontal copper bar 27d of the copper bar support 27 are integrally bent and formed. The first to fourth inner copper plates of the inner copper bar sleeve 1, the inner tap copper bar 16 and the first bus bar 17 are integrally bent and formed.
[0052] Embodiment 2
[0053] As shown in the drawings, Figure 11 The high-frequency transformer capable of low-voltage and large-current output provided in the embodiment is different from that in Embodiment 1 in that an inductance magnetic core 4 is mounted on the first vertical copper bar 27a of the copper bar support 27, and another inductance magnetic core 4 is mounted on the second vertical copper bar 27b. The output filter inductance can realize the assembly of multiple inductance magnetic cores on the copper bar support 27 of the outer copper bar sleeve 2.
[0054] Embodiment 3
[0055] As shown in the drawings, Figure 12 The high-frequency transformer capable of low-voltage and large-current output provided in the embodiment is different from that in Embodiment 1 in that an inductance magnetic core 4 is mounted on the copper bar support 27, and the inductance magnetic core 4 is composed of an EE ferrite magnetic core.
[0056] The output filter inductance of the utility model can realize the assembly of multiple magnetic cores on the copper bar support 27 of the outer copper bar sleeve 2, so that from the economic point of view, a pair of EE ferrite magnetic cores or a group of flat ring amorphous iron cores, or two groups of amorphous magnetic cores and the like can be adopted, and the requirement of different magnetic core assembly forms in different power output can be realized flexibly and variously in one structure design.
[0057] The utility model discloses can realize integral modular assembly with high frequency transformer and output filter inductance on same structure, reduced bridging process between different devices (transformer and output inductance), also reduced the contact resistance that exists at connecting point when connecting inevitably, make the case of the larger heat loss that occurs when passing through large current.
[0058] In the utility model, in the case where no opposite statement is made, the orientation words such as "up and down, left and right, front and back, inside and outside and vertical and horizontal" contained in the term only represent the orientation of the term in the conventional use state, or the common name understood by the person skilled in the art, and should not be regarded as the limitation of the term, at the same time, the serial nouns such as "first", "second" and "third" do not represent the specific quantity and order, and are only used for distinguishing the name, and moreover, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in such process, method, article or equipment.
[0059] The above only is the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A high frequency transformer with low voltage and high current output, characterized in that, The high-frequency transformer comprises: An inner copper bar sleeve (1), an outer copper bar sleeve (2) and a primary coil (5) arranged coaxially inside and outside; The inner copper bar sleeve (1) has a cavity (11) extending along the axial direction, which is used for accommodating a transformer magnetic core (3); The outer copper bar sleeve (2) is arranged on the inner copper bar sleeve (1) along the axial direction; The primary coil (5) is arranged between the inner copper bar sleeve (1) and the outer copper bar sleeve (2) and is insulated from the inner copper bar sleeve (1) and the outer copper bar sleeve (2); The inner copper bar sleeve (1) and the outer copper bar sleeve (2) are both secondary coils of the high-frequency transformer.
2. The high-frequency transformer according to claim 1, wherein: The inner copper bar sleeve (1) comprises first to fourth inner copper plates connected in sequence, and the first and third inner copper plates and the second and fourth inner copper plates are arranged in parallel with each other; The outer copper bar sleeve (2) comprises first to fourth outer copper plates connected in sequence, and the first and third outer copper plates and the second and fourth outer copper plates are arranged in parallel with each other; The inner copper bar sleeve (1) is arranged in the outer copper bar sleeve (2).
3. The high-frequency transformer according to claim 2, wherein: The fourth inner copper plate (15) of the inner copper bar sleeve (1) is bent by 90 degrees towards the second inner copper plate (13) and extends to form an inner tap copper bar (16); The lower edge of the first outer copper plate (21) of the outer copper bar sleeve (2) is bent by 90 degrees away from the third outer copper plate (23) and extends to form an outer tap copper bar (25); The inner tap copper bar (16) and the outer tap copper bar (25) are both center tap lead-out ends of the secondary coil.
4. The high-frequency transformer according to claim 3, wherein: The inner tap copper bar (16) has a cross section in the shape of a U, and the opening of the U is directed towards the extending direction of the outer tap copper bar (25) of the outer copper bar sleeve (2); The two ends of the bottom edge (16a) of the U extend outwards and beyond the two ends of the inner copper bar sleeve (1), and the width of the extension of the bottom edge (16a) is substantially the same as the width of the outer tap copper bar (25) of the outer copper bar sleeve (2); The distal edges of the two side edges (16b) of the U are substantially flush with the outer edges of the outer tap copper bar (25) of the outer copper bar sleeve (2); The through holes in the two side edges (16b) of the U of the inner tap copper bar (16) and the threaded holes in the two ends of the outer tap copper bar (25) of the outer copper bar sleeve (2) are connected by bolts to realize the electrical connection between the inner tap copper bar (16) and the outer tap copper bar (25).
5. The high-frequency transformer according to claim 4, wherein: One end of the first inner copper plate (12) of the inner copper bar sleeve (1) extends out of the inner copper bar sleeve (1) as a first bus bar (17) parallel to the axial direction of the inner copper bar sleeve (1); The first bus bar (17) comprises: A first horizontal section (17a) extending outwards from one end of the first inner copper plate (12); A first vertical section (17b) extending downwards by 90 degrees from the outside of the first horizontal section (17a); and A first horizontal section (17c) extending outwards from the outside of the first vertical section (17b). and the second horizontal section (17c) is substantially parallel to the first horizontal section (17a); One end of the fourth outer copper plate (24) of the outer copper bar sleeve (2) extends outward along the axis direction of the outer copper bar sleeve (2) to form a second bus bar (26) outside the outer copper bar sleeve (2); The second bus bar (26) comprises: A third horizontal section (26a) extending outward from one end of the fourth outer copper plate (24); A second vertical section (26b) extending downward by 90 degrees outside the third horizontal section (26a); And a fourth horizontal section (26c) extending outward by 90 degrees at the lower end of the second vertical section (26b), and the fourth horizontal section (26c) is substantially parallel to the third horizontal section (26a); Wherein, the second horizontal section (17c) of the first bus bar (17) forms an output end of a secondary side coil of a high-frequency transformer, and the fourth horizontal section (26c) of the second bus bar (26) forms another output end of the secondary side coil of the high-frequency transformer.
6. The high-frequency transformer of claim 5, wherein: Both ends of the third inner copper plate (14) of the inner copper bar sleeve (1) extend outward to form copper plate extensions (14a) for mounting temperature sensing switches.
7. The high-frequency transformer according to claim 6, characterized in that Further comprising: A copper bar support (27) in the shape of a U, electrically connected to the tap copper bar of the secondary side coil of the high-frequency transformer, for mounting the magnetic core of the output inductor, comprising a first vertical copper bar (27a), a second vertical copper bar (27b), a first horizontal copper bar (27c), and a second horizontal copper bar (27d); Wherein, the lower end of the first vertical copper bar (27a) is connected to the outside of the outer tap copper bar (25) of the outer copper bar sleeve (2), the upper end of the first vertical copper bar (27a) is connected to one end of the first horizontal copper bar (27c), the other end of the first horizontal copper bar (27c) is connected to the upper end of the second vertical copper bar (27b), the lower end of the second vertical copper bar (27b) is connected to one end of the second horizontal copper bar (27d), and the other end of the second horizontal copper bar (27d) is connected to the positive output end.
8. The high-frequency transformer of claim 7, wherein: The first vertical copper bar (27a), the second vertical copper bar (27b), and the first horizontal copper bar (27c) have the same width, and the first vertical copper bar (27a) and the second vertical copper bar (27b) have the same height.
9. The high-frequency transformer of claim 8, wherein: The first to fourth outer copper plates, the outer tap copper bar (25), the second bus bar (26), and the first vertical copper bar (27a), the second vertical copper bar (27b), the first horizontal copper bar (27c), and the second horizontal copper bar (27d) of the copper bar support (27) of the outer copper bar sleeve (2) are integrally formed.
10. The high-frequency transformer of claim 8, wherein: The first to fourth inner copper plates of the inner copper bar sleeve (1), the inner-tapped copper bar (16) and the first bus bar (17) are integrally formed.