Ultrahigh-frequency transformer with water-cooled magnetic core

Abstract

The utility model relates to an ultrahigh frequency transformer with a water-cooled magnetic core, which belongs to the technical field of transformers and comprises an insulating cylinder, a plurality of magnetic bars are fixedly mounted in the insulating cylinder, and a primary winding copper tube, a secondary winding copper bar and a secondary cooling copper tube are sequentially arranged on the outer wall of the insulating cylinder from inside to outside. According to the utility model, the magnetic bar, the primary winding copper pipe, the secondary winding copper bar, the secondary cooling copper pipe and other structures are respectively subjected to water cooling. The ultrahigh-frequency transformer is not provided with a magnetic core of a closed structure of a conventional transformer, and is not completely hollow like an air-core transformer; the ultrahigh frequency transformer provided by the utility model is provided with the magnetic core, but adopts a plurality of independent magnetic bars (as the magnetic core), a closed loop is not formed, and the magnetic core is cooled by water, so that the magnetic core is prevented from loss of excitation due to over-temperature; as the weight of the magnetic bar is far smaller than that of the closed magnetic core, the weight of the ultrahigh-frequency transformer is much smaller than that of a conventional high-frequency transformer.

Description

Technical Field

[0001] The utility model relates to an ultra-high frequency transformer with a water-cooled magnetic core, belongs to the technical field of transformers and is used as an ultra-high frequency current amplifying transformer in an ultra-high frequency induction heating power supply. Background Art

[0002] Conventional ultra-high frequency transformers use either U-shaped ferrite cores or air-core transformers. When using U-shaped ferrite cores, the cross-sectional area of ​​a single core is larger. During use, the core is often induced to heat by high-frequency eddy currents, resulting in abnormally high temperature rise in the transformer core, demagnetization or cracking of the core. When using an air-core transformer, its coupling efficiency is equipped with a water-cooling structure to effectively reduce the loss caused by increased heat and avoid device damage. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problems existing in the background technology, and for this purpose, provides an ultra-high frequency transformer with a water-cooled magnetic core.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] An ultra-high frequency transformer with a water-cooled magnetic core comprises an insulating cylinder;

[0006] A plurality of magnetic rods are fixedly installed inside the insulating cylinder, and both ends of the insulating cylinder are respectively threadedly connected to a first end cover and a second end cover, a first water connector is installed on the first end cover, and a second water connector is installed on the second end cover;

[0007] The outer wall of the insulating cylinder is provided with a primary winding copper tube, a secondary winding copper bar, and a secondary cooling copper tube in sequence from the inside to the outside; the two ends of the primary winding copper tube are respectively connected to a third water joint and a fourth water joint, and the two ends of the secondary cooling copper tube are respectively connected to a fifth water joint and a sixth water joint;

[0008] The first and second externally connected copper bars are welded to the two ends of the primary winding copper tube respectively; the third and fourth externally connected copper bars are welded to the two ends of the secondary winding copper bar respectively.

[0009] The following is a technical solution further defined by the present utility model: a first sealing ring is provided between the insulating cylinder and the first end cover, and a second sealing ring is provided between the insulating cylinder and the second end cover.

[0010] The following is a technical solution further defined by the present utility model: a plurality of honeycomb-shaped through holes are arranged in the insulating cylinder, the direction of the through holes is the same as the axial direction of the insulating cylinder, and the magnetic rod is installed in the through holes, and the diameter of the magnetic rod is smaller than the diameter of the through holes in the insulating cylinder.

[0011] The following is a technical solution further defined by the present invention: the primary winding copper tube is wound on the outer wall of the insulating cylinder, the secondary winding copper bar is wound on the outside of the primary winding copper tube, and the secondary cooling copper tube is welded to the outer wall of the primary winding copper bar.

[0012] The following is a technical solution further defined by the present utility model: a first water hole is provided on the third external connecting copper busbar, a second water hole is provided on the fourth external connecting copper busbar, the secondary cooling copper tube is connected to two water channel converging copper tubes, and the first water hole and the second water hole are respectively connected to the two water channel converging copper tubes.

[0013] Compared with the prior art, the utility model has the following technical effects:

[0014] The ultra-high frequency transformer of the present invention does not have a closed-structure magnetic core like a conventional transformer, nor is it completely hollow like an air-core transformer; the ultra-high frequency transformer of the present invention has a magnetic core, but uses multiple independent magnetic rods (as magnetic cores), does not form a closed loop, and the magnetic core is cooled by water to avoid overheating and demagnetization of the magnetic core; since the weight of the magnetic rods is much smaller than that of the closed magnetic core, the weight of the ultra-high frequency transformer of the present invention is much smaller than that of a conventional high-frequency transformer.

[0015] The primary winding and secondary winding of the ultra-high frequency transformer designed by the utility model are closely fitted, which reduces the leakage magnetic field between the primary winding and the secondary winding of the transformer as much as possible, and the magnetic rod design inside the transformer improves the coupling efficiency;

[0016] The utility model has a compact overall structure, a small volume, and a significantly reduced weight, and can be used as a portable transformer, which is convenient to move.

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a main structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0021] Figure 3 It is a right side structural schematic diagram of the utility model;

[0022] Figure 4 yes Figure 2 AA section view in;

[0023] Figure 5 yes Figure 3 BB section diagram in;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the utility model.

[0025] Figure numerals: 1. first end cover; 2. second end cover; 3. insulating cylinder; 4. first sealing ring; 5. second sealing ring; 6. magnetic rod; 7. first water joint; 8. second water joint; 9. primary winding copper tube; 10. secondary winding copper bar; 11. secondary cooling copper tube; 12. third external connection copper bar; 13. fourth external connection copper bar; 14. fifth water joint; 15. sixth water joint; 16. third water joint; 17. fourth water joint; 18. first external connection copper bar; 19. second external connection copper bar; 20. water channel confluence copper tube; 21. first water hole; 22. second water hole. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0030] like Figure 1-6 As shown, a UHF transformer with a water-cooled magnetic core is provided. Unlike conventional high-frequency transformers, the UHF transformer of the utility model does not have a closed-structure magnetic core of conventional transformers, nor is it completely hollow like a hollow transformer. The UHF transformer of the utility model has a magnetic core, but uses multiple independent magnetic rods (as magnetic cores), does not form a closed loop, and the magnetic core is cooled by water to prevent the magnetic core from overheating and demagnetizing. Since the weight of the magnetic rod is much smaller than that of the closed magnetic core, the weight of the UHF transformer of the utility model is much smaller than that of a conventional high-frequency transformer. Since the UHF transformer of the utility model has a magnetic rod design, the coupling efficiency of the transformer is much higher than that of a hollow transformer. It can output a small volume and high current output that meets the requirements of the UHF induction heating power supply. The specific structure is as follows:

[0031] An insulating cylinder 3 for water flow is designed inside the transformer close to the primary winding of the transformer. A plurality of through holes in a honeycomb shape are designed inside the insulating cylinder 3, wherein the direction of the through holes is the same as the axial direction of the insulating cylinder 3. The two ends of the insulating cylinder 3 are respectively connected to the first end cover 1 and the second end cover 2, a first sealing ring 4 is arranged between the insulating cylinder 3 and the first end cover 1, and a second sealing ring 5 is arranged between the insulating cylinder 3 and the second end cover 2; the first end cover 1 and the second end cover 2 are tightened with the insulating cylinder 3 by threads and can also be disassembled. A first water joint 7 is installed on the first end cover 1, and a second water joint 8 is installed on the second end cover 2, with water entering at one end and water exiting at the other end, flowing through the honeycomb through holes in the insulating cylinder 3. A plurality of high resistivity magnetic rods 6 are designed inside the insulating cylinder 3, and the magnetic rods 6 are installed in the through holes, and the diameter of the magnetic rods 6 is smaller than the diameter of the through holes in the insulating cylinder 3. Therefore, when the first water joints 7 and the second water joints 8 at both ends pass water to the insulating cylinder 3, the water will flow through the gap between the through holes of the insulating cylinder 3 and the magnetic rod 6, so as to cool the magnetic rod 6 and ensure that the temperature of the transformer core will not be overheated.

[0032] The primary winding copper tube 9 is tightly wound on the outer wall of the insulating cylinder 3, and the secondary winding copper bar 10 is tightly wound on the outer side of the primary winding copper tube 9. The secondary cooling copper tube 11 is welded to the outer wall of the primary winding copper bar 10. The primary winding copper tube 9 serves as the primary winding of the transformer, and the primary winding copper bar 10 serves as the secondary winding of the transformer. Both the primary winding copper tube 9 and the secondary cooling copper tube 11 are cooled by water, wherein the two ends of the primary winding copper tube 9 are respectively connected to the third water joint 16 and the fourth water joint 17, and the two ends of the secondary cooling copper tube 11 are respectively connected to the fifth water joint 14 and the sixth water joint 15. Therefore, the fifth water joint 14 and the sixth water joint 15 are responsible for cooling the secondary cooling copper tube 11 by water; the third water joint 16 and the fourth water joint 17 are responsible for cooling the primary winding copper tube 9 by water.

[0033] The first and second externally connected copper bars 18 and 19 are respectively welded to the two ends of the primary winding copper tube 9 for external connection of the primary winding copper tube 9. The first and second externally connected copper bars 18 and 19 are the primary input ends of the transformer.

[0034] The third external connection copper bar 12 and the fourth external connection copper bar 13 are respectively welded to the two ends of the secondary winding copper bar 10 for external connection of the secondary winding copper bar 10. The third external connection copper bar 12 and the fourth external connection copper bar 13 are the secondary output ends of the transformer and are used to connect the induction coil.

[0035] The third external connection copper bar 12 is provided with a first water hole 21, the fourth external connection copper bar 13 is provided with a second water hole 22, the secondary cooling copper tube 11 is connected to two water channel converging copper tubes 20, and the first water hole 21 and the second water hole 22 are respectively connected to the two water channel converging copper tubes 20. Therefore, the first water hole 21 of the third external connection copper bar 12 and the second water hole 22 of the fourth external connection copper bar 13 are responsible for passing water to the externally connected induction coil.

[0036] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the utility model without departing from the content of the technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. An ultra-high frequency transformer with a water-cooled magnetic core, characterized in that: It comprises an insulating cylinder (3); A plurality of magnetic rods (6) are fixedly installed inside the insulating cylinder (3); the two ends of the insulating cylinder (3) are respectively threadedly connected to a first end cover (1) and a second end cover (2); a first water connector (7) is installed on the first end cover (1), and a second water connector (8) is installed on the second end cover (2); The outer wall of the insulating cylinder (3) is provided with a primary winding copper tube (9), a secondary winding copper bar (10), and a secondary cooling copper tube (11) in sequence from the inside to the outside; the two ends of the primary winding copper tube (9) are respectively connected to a third water joint (16) and a fourth water joint (17), and the two ends of the secondary cooling copper tube (11) are respectively connected to a fifth water joint (14) and a sixth water joint (15); The two ends of the primary winding copper tube (9) are respectively welded with a first external connection copper bar (18) and a second external connection copper bar (19); the two ends of the secondary winding copper bar (10) are respectively welded with a third external connection copper bar (12) and a fourth external connection copper bar (13).

2. An ultra-high frequency transformer with a water-cooled magnetic core as claimed in claim 1, characterized in that: A first sealing ring (4) is arranged between the insulating cylinder (3) and the first end cover (1), and a second sealing ring (5) is arranged between the insulating cylinder (3) and the second end cover (2).

3. The ultra-high frequency transformer with a water-cooled magnetic core according to claim 1, characterized in that: The insulating cylinder (3) is provided with a plurality of honeycomb-shaped through holes, the direction of the through holes being the same as the axial direction of the insulating cylinder (3), the magnetic rod (6) being installed in the through holes, and the diameter of the magnetic rod (6) being smaller than the diameter of the through holes in the insulating cylinder (3).

4. The ultra-high frequency transformer with a water-cooled magnetic core according to claim 1, characterized in that: The primary winding copper tube (9) is wound on the outer wall of the insulating cylinder (3), the secondary winding copper bar (10) is wound on the outer side of the primary winding copper tube (9), and the secondary cooling copper tube (11) is welded to the outer wall of the secondary winding copper bar (10).

5. The ultra-high frequency transformer with a water-cooled magnetic core according to claim 1, characterized in that: The third externally connected copper bar (12) is provided with a first water hole (21), the fourth externally connected copper bar (13) is provided with a second water hole (22), the secondary cooling copper tube (11) is connected to two water channel converging copper tubes (20), and the first water hole (21) and the second water hole (22) are respectively connected to the two water channel converging copper tubes (20).

Images