High-frequency transformer device and manufacturing method thereof

Abstract

The invention relates to a transformer, in particular to a high-frequency transformer device and a manufacturing method thereof, and the high-frequency transformer device comprises a secondary side framework, a secondary side winding, an insulation isolating ring, a secondary side positioning pipe, a primary side winding, a primary side framework, a U-shaped magnetic core and an insulation pressing block; the U-shaped magnetic cores are divided into two groups, each group of U-shaped magnetic cores are respectively placed on the insulating pressing block, the two ends of the primary side framework are respectively sleeved on vertical beams attached to each group of U-shaped magnetic cores, and the secondary side positioning pipes are respectively sleeved on the outer sides of the two ends of the primary side framework and are clamped with corresponding U-shaped magnetic core cross beams; the insulation isolation rings and the secondary side framework are sequentially installed on the primary side framework, and the insulation isolation rings on the two sides are clamped with the corresponding secondary side positioning pipes respectively. The two groups of U-shaped magnetic cores are in butt joint with the inner hole of the primary side framework, so that magnetic saturation is effectively avoided; the primary winding and the secondary winding are coaxially assembled, so that the efficiency of the transformer is improved, and the eddy-current loss is reduced.

Description

Technical Field

[0001] The present invention relates to a transformer, and particularly to a high-frequency transformer device and a manufacturing method thereof. Background Art

[0002] A high-frequency transformer is a core component of an electron microscope equipment system and a key element for realizing electric energy conversion and voltage transformation. The high-frequency transformer integrates knowledge of disciplines such as electromagnetics, materials science, and thermodynamics, and also has a certain technical difficulty. In the design, problems such as the skin effect and eddy current loss caused by high frequency need to be overcome. Similar to a general transformer, a high-frequency transformer is also composed of a primary winding, a secondary winding, a primary and secondary skeleton, a magnetic core, etc. When the wire diameter of the secondary winding is small, the number of turns is large, and the winding method is improper, the existing high-frequency transformer is prone to generate more distributed capacitance and more leakage inductance, which will lead to heating and large losses, resulting in unstable operation of the high-frequency transformer and easy damage. Summary of the Invention

[0003] Aiming at the deficiencies of the above-mentioned transformer, the purpose of the present invention is to provide a high-frequency transformer with reasonable and novel structure, stable performance, good insulation performance, and high efficiency.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A high-frequency transformer device includes a secondary skeleton, a secondary winding, an insulating isolation ring, a secondary positioning tube, a primary winding, a primary skeleton, a U-shaped magnetic core, and an insulating pressing block; there are two groups of U-shaped magnetic cores, and each group is composed of two U-shaped magnetic cores placed side by side, and their vertical beams are attached back to back; each group of U-shaped magnetic cores is respectively placed on the insulating pressing block, the primary winding is wound on the primary skeleton, and both ends of the primary skeleton are respectively sleeved on the vertical beams where each group of U-shaped magnetic cores are attached; the secondary positioning tubes are respectively sleeved on the outer sides of both ends of the primary skeleton and are clamped with the corresponding U-shaped magnetic core cross beams; the secondary winding is wound on the secondary skeleton, and the insulating isolation ring and the secondary skeleton are sequentially installed on the primary skeleton, and the insulating isolation rings on both sides are respectively clamped with the corresponding secondary positioning tubes; the two insulating pressing blocks are fastened and pressed tightly through a fastening device.

[0005] Further, the insulating pressing block is processed and formed from an epoxy resin board, and a groove is provided on the insulating pressing block, and the cross beam back of the U-shaped magnetic core is placed in the groove of the insulating pressing block.

[0006] Further, the primary skeleton is a cylindrical tube made of insulating material, and slots are opened at both ends, and the slots are clamped on the cross beam of the U-shaped magnetic core.

[0007] Further, the secondary positioning tube is a cylindrical tube made of insulating material, and a slot is opened on one side, and its slot opening is clamped on the cross beam of the U-shaped magnetic core.

[0008] Further, the insulating isolation ring is an annular insulator with a circular ring groove, and the secondary side positioning tube is clamped in the circular ring groove of the corresponding insulating isolation ring.

[0009] Further, the secondary side skeleton is a cylindrical tubular shape made of insulating material.

[0010] Further, the U-shaped magnetic core is made by pressing ferrite powder.

[0011] Further, the fastening device is a bolt and nut.

[0012] A manufacturing method of a high-frequency transformer device includes the following steps: (1) Wind the primary side winding according to the design with Litz wire or enameled wire for the number of turns and fix both ends. Take a group of two U-shaped magnetic cores and place them side by side on an insulating pressing block. Put the vertical beam of the U-shaped magnetic core into the inner hole at one end of the primary side skeleton, and place the cross beam of the U-shaped magnetic core in the slot of the primary side skeleton; (2) Take a secondary side positioning tube and put it on the outside of the primary side skeleton, and place its slot horizontally on the cross beam of the U-shaped magnetic core; Take an insulating isolation ring and place it on the upper end of the secondary side positioning tube, and then place the secondary side skeleton with the wound secondary side winding on the insulating isolation ring. By analogy, assemble the insulating isolation ring, the secondary side winding and the skeleton completely, and finally place the secondary side positioning tube on the upper end of the insulating isolation ring; (3) Then take another group of two U-shaped magnetic cores and place them side by side in the inner hole at the other end of the primary side skeleton. Place the cross beam of the magnetic core in the slot of the primary side skeleton, and at the same time, place it in the slot of the secondary side positioning tube; (4) Then take another insulating pressing block and place it on the back of the cross beam of the other group of magnetic cores, and fasten and press it tightly with fastening bolts and nuts. Connect the head and tail ends of the secondary side winding of each group in series, weld and wrap the joints well and fix them to complete the assembly work.

[0013] Compared with the prior art, the beneficial effects of the present invention are: By docking two groups of U-shaped magnetic cores in the inner hole of the primary side skeleton, the present invention effectively avoids magnetic saturation; by coaxially assembling the primary side winding and the secondary side winding, the efficiency of the transformer is improved and the eddy current loss is reduced. Through improvement, the transformer has the advantages of high voltage resistance, high temperature resistance, small loss and stable performance. Description of the Drawings

[0014] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings: Figure 1 is an axonometric view of the present invention; Figure 2 is a schematic diagram of the insulating isolation ring; Figure 3 is a schematic diagram of the secondary side skeleton positioning sleeve; Figure 4 Schematic diagram of the primary side skeleton and the primary side winding; Figure 5 Schematic diagram of the U-shaped magnetic core; Figure 6 Schematic diagram of the insulating pressing block.

[0015] In the figure: 1. Secondary side skeleton, 2. Secondary side winding, 3. Insulating isolation ring, 3-1. Ring groove, 4. Secondary side positioning tube, 4-1. Notch, 5. Primary side skeleton, 5-1. Notch, 6. U-shaped magnetic core, 6-1. Cross beam, 6-2. Vertical beam, 7. Insulating pressing block, 7-1. Round hole, 7-2. Shallow groove, 8. Bolt. Detailed implementation manners

[0016] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0017] As Figure 1 shown, a high-frequency transformer device of the present invention includes a secondary side skeleton 1, an insulating isolation ring 3, a secondary side positioning sleeve 4, a primary side skeleton 5, a U-shaped magnetic core 6, an insulating pressing block 7, and a bolt 8.

[0018] As Figures 2 to 6 shown, according to the manufacturing process, first, the vertical beams 6-2 of a group of U-shaped magnetic cores 6 are placed back-to-back, and the cross beam 6-1 is placed on the shallow groove 7-2 of the insulating pressing block 7; The primary side skeleton 5 with the primary side winding wound thereon is sleeved outside the vertical beam 6-2 of the U-shaped magnetic core 6, and the notch 5-1 of the primary side skeleton is stuck on the cross beam 6-1 of the U-shaped magnetic core. Take a secondary side positioning tube 4 and sleeve it outside the primary side skeleton 5, and its notch 4-1 is stuck on the cross beam 6-1 of the magnetic core; Take an insulating isolation ring 3 and sleeve it on the secondary side positioning tube 4 so that it is stuck in the ring groove 3-1 of the insulating isolation ring; place the secondary side skeleton 1 with the secondary side winding 2 wound thereon in the ring groove 3-1 of the insulating isolation ring 3; Then place another insulating isolation ring 3. Since the number of turns of the secondary side winding is large, the windings are respectively wound on several skeletons. And so on, the secondary side skeleton 1 and the insulating isolation ring 3 are successively installed outside the primary side skeleton 5, and a secondary side positioning tube 4 is placed at the uppermost end.

[0019] Similarly, take two U-shaped magnetic cores 6, place the vertical beams 6-2 of the magnetic cores back-to-back into the inner hole of the primary side skeleton, with the back of the cross beam 6-1 of the magnetic core facing upward, and press another insulating pressing block 7 on the magnetic core 6, and the back of the cross beam of the magnetic core lies in the shallow groove 7-2 of the insulating pressing block 7. Pass the bolt 8 through the round hole 7-1 of the insulating pressing block 7 and fasten it with a nut.

[0020] Connect the ends of adjacent secondary windings 2 in series, fasten them securely, fix them with tape, and coat the secondary windings 2 with epoxy resin, which can not only isolate the air but also play a fixing role.

[0021] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed as above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-frequency transformer device, characterized in that: It includes a secondary side skeleton, a secondary side winding, an insulation isolation ring, a secondary side positioning tube, a primary side winding, a primary side skeleton, a U-shaped magnetic core, and an insulation pressing block; there are two groups of the U-shaped magnetic cores, and each group is composed of two U-shaped magnetic cores placed side by side, with their vertical beams attached back to back; each group of U-shaped magnetic cores is respectively placed on the insulation pressing block, the primary side winding is wound on the primary side skeleton, and both ends of the primary side skeleton are respectively sleeved on the vertical beams where each group of U-shaped magnetic cores are attached. The secondary side positioning tubes are respectively sleeved outside both ends of the primary side skeleton and are engaged with the cross beams of the corresponding U-shaped magnetic cores; the secondary side winding is wound on the secondary side skeleton, and the insulation isolation ring and the secondary side skeleton are sequentially installed on the primary side skeleton, and the insulation isolation rings on both sides are respectively engaged with the corresponding secondary side positioning tubes; the two insulation pressing blocks are fastened and pressed tightly through a fastening device.

2. The high-frequency transformer device as described in claim 1, characterized in that: The insulation pressing block is processed and formed from an epoxy resin board, and a groove is provided on the insulation pressing block, and the cross beam of the U-shaped magnetic core is placed on the groove of the insulation pressing block.

3. A high-frequency transformer device as described in claim 1, characterized in that: The primary side skeleton is a cylindrical tube made of insulating material, and notch openings are provided at both ends, and the notch openings are engaged with the cross beams of the U-shaped magnetic cores.

4. A high-frequency transformer device as described in claim 1, characterized in that: The secondary side positioning tube is a cylindrical tube made of insulating material, and a groove is provided on one side, and its notch opening is engaged with the cross beam of the U-shaped magnetic core.

5. A high-frequency transformer device according to claim 1 or 4, characterized in that: The insulation isolation ring is an annular insulator with an annular groove, and the secondary side positioning tube is stuck in the annular groove of the corresponding insulation isolation ring.

6. A high-frequency transformer device according to claim 1, characterized in that: The secondary side skeleton is a cylindrical tube made of insulating material.

7. A high-frequency transformer device according to claim 1, characterized in that: The U-shaped magnetic core is pressed and formed from ferrite powder.

8. A high-frequency transformer device according to claim 1, characterized in that: The fastening device is a bolt and nut.

9. A manufacturing method of a high-frequency transformer device, characterized in that: It includes the following steps: (1) Wind the primary side winding with the designed number of turns using Litz wire or silk-covered wire and fix both ends. Take a group of two U-shaped magnetic cores and place them side by side on an insulation pressing block. Put the vertical beam of the U-shaped magnetic core into the inner hole at one end of the primary side skeleton, and place the cross beam of the U-shaped magnetic core in the notch opening of the primary side skeleton. (2) Take a secondary side positioning tube and sleeve it outside the primary side skeleton, and place its notch opening horizontally on the cross beam of the U-shaped magnetic core. Take an insulation isolation ring and place it on the upper end of the secondary side positioning tube, and then place the secondary side skeleton wound with the secondary side winding on the insulation isolation ring. And so on, assemble the insulation isolation ring, the secondary side winding and the skeleton completely, and finally place the secondary side positioning tube on the upper end of the insulation isolation ring. (3) Then take another group of two U-shaped magnetic cores and place them side by side into the inner hole at the other end of the primary side skeleton. The cross beam of the magnetic core is placed in the notch opening of the primary side skeleton and is also placed in the notch opening of the secondary side positioning tube. (4) Then take an insulation pressing block and place it on the back of the cross beam of the other group of magnetic cores, and fasten and press tightly with fastening bolts and nuts. Connect the head and tail ends of the secondary side winding in series for each group, weld and wrap the joints well and fix them to complete the assembly work.

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