WO2021073574A1

WO2021073574A1 - Transformer framework, transformer and electrical equipment

Info

Publication number: WO2021073574A1
Application number: PCT/CN2020/121183
Authority: WO
Inventors: 覃承勇; 黎青海; 马赤兵; 周福昌
Original assignee: 广东美的厨房电器制造有限公司
Priority date: 2019-10-16
Filing date: 2020-10-15
Publication date: 2021-04-22
Also published as: CN110690031A; CN110690031B

Abstract

The present application belongs to the technical field of transformers, and relates to a transformer framework (100), a transformer and electrical equipment. A primary winding groove (101) and a secondary winding groove (102) are provided on the transformer framework (100), the primary winding groove (101) is enclosed by a first side plate (20), a partition plate (40) and a bobbin (10), and the secondary winding groove (102) is enclosed by a second side plate (30), the partition plate (40) and the bobbin (10). Magnetic cores (200) can be inserted into ports (11) of the bobbin (10), respectively, and primary coils can be neatly and tightly wound around the primary winding groove (101), and secondary coils can be neatly and tightly wound around the secondary winding groove (102). The transformer framework (100) can avoid the risk of a winding insulation layer being broken down caused by multi-groove jumper wires of the existing transformer framework, and can improve the coupling rate between the secondary coils and the primary coils and can enable the coupling rate to be maintained in a stable range, and finally can increase the transmission efficiency of the transformer, and ensure the stability of batch production. A transformer having the transformer framework (100) and electrical equipment having the transformer can also ensure transmission efficiency after long time use of the transformer.

Description

Transformer skeleton, transformer and electrical equipment

This application claims the priority of the Chinese patent application filed at the Chinese Patent Office on October 16, 2019, with the application number 201910984296.8 and the invention title "transformer skeleton, transformer and electrical equipment", the entire content of which is incorporated by reference in In this application.

Technical field

This application belongs to the technical field of transformers, and relates to a transformer skeleton, a transformer having the transformer skeleton, and an electrical equipment having the transformer.

Background technique

Transformers are widely used in electrical equipment, such as frequency conversion microwave ovens. Frequency conversion microwave ovens use power electronic technology to first convert the power frequency of the mains voltage into a high-frequency voltage of 20000-50000Hz, and then output high voltage through a high-frequency step-up transformer to drive The magnetron outputs microwaves. The step-up transformer used in the frequency converter in the frequency conversion microwave oven is mainly composed of a skeleton, a primary coil and a secondary coil wound on the skeleton, and two magnetic cores inserted into the skeleton and arranged in pairs.

The transformer in the prior art adopts multiple secondary winding grooves. In the process of winding the transition from one secondary winding groove to another secondary winding groove, one wire will inevitably be connected across the winding groove. There will be a very high voltage difference between the bottom layer and the top layer of the line. If the transformer winding process is not good, this high voltage difference will be directly applied to the two times. On the jumper wire of the first-class winding groove, this voltage difference is basically close to the insulation voltage of the winding. After the transformer is used for a period of time, the winding will eventually be broken down due to the aging of the winding, and the transformer will be burned out multiple times at the same time. The first-level winding groove will inevitably increase the distance between the secondary coil and the primary coil, which will reduce the magnetic coupling between the primary and the secondary, and the reduction of the magnetic coupling will reduce the transmission efficiency of the transformer.

The transformer in the prior art adopts two C-shaped magnetic cores. After the two C-shaped magnetic cores are installed opposite to each other on the skeleton, the end faces of the magnetic cores must be separated by a certain distance, that is, an air gap. There will be a certain distance around the air gap. The magnetic flux diffuses beyond the magnetic core. Due to the small air gap distance, the diffused magnetic flux is basically concentrated in a small area around the air gap, and the magnetic field is very strong, which will cause local overheating of the magnetic field lines near the air gap. If it is used for a long time, the life of the transformer will be reduced.

technical problem

One of the objectives of the embodiments of the present application is to provide a transformer skeleton, a transformer, and electrical equipment to solve the technical problems in the prior art that the transformer is easy to burn and the transmission efficiency is reduced after a long time use of the transformer.

Technical solutions

In order to solve the above technical problems, the technical solutions adopted in the embodiments of this application are:

In a first aspect, a transformer skeleton is provided. The transformer skeleton has a primary winding groove and a secondary winding groove. The transformer skeleton includes a winding drum, and a first winding drum connected to one end of the winding drum. A side plate, a second side plate connected to the other end of the bobbin, and a partition plate connected to the outer surface of the bobbin and located between the first side plate and the second side plate , The first side plate, the partition plate, and the outer surface of the bobbin located between the first side plate and the partition plate enclose the primary winding groove, and the second side The outer surface of the board, the partition, and the bobbin located between the second side plate and the partition surrounds the secondary winding groove, and the two ports of the bobbin are respectively For the insertion of two magnetic cores.

In one embodiment, the side of the first side plate away from the partition plate is provided with a first positioning groove for positioning the magnetic core, and the first positioning groove is communicated with a port of the bobbin ；

A side of the second side plate away from the partition plate is provided with a second positioning groove for positioning another magnetic core, and the second positioning groove is communicated with the other port of the bobbin.

In an embodiment, a first positioning wall is provided on the side of the first side plate away from the partition, and the first positioning groove is formed in the first positioning wall;

A second positioning wall is provided on the side of the second side plate away from the partition, and the second positioning groove is formed in the second positioning wall.

In one embodiment, the first side plate has a first positioning opening communicating with the first positioning groove, the second side plate has a second positioning opening communicating with the second positioning groove, and the The orientation of the first positioning opening and the second positioning opening are the same, and the orientation of the first positioning opening and the axis of the bobbin are perpendicular to each other.

In one embodiment, the width of the primary winding groove is less than or equal to 15mm, the width of the secondary winding groove is less than or equal to 8mm, and the distance between the primary winding groove and the secondary winding groove The separation gap is less than or equal to 3mm.

In one embodiment, the inner diameter of the bobbin is greater than or equal to 16 mm.

In one embodiment, the bobbin, the first side plate, the second side plate and the partition are integrally formed;

Alternatively, the reel is divided into a first reel and a second reel, the partition is divided into a first partition and a second partition, the first reel, the first side The plate and the first partition are integrally formed, the second bobbin, the second side plate and the second partition are integrally formed, and the first partition is connected to the first partition. On the second partition.

In a second aspect, a transformer is provided, including the above-mentioned transformer skeleton, two magnetic cores, a primary coil wound in the primary winding groove, and a secondary coil wound in the secondary winding groove , The two magnetic cores are respectively inserted into the two ports of the bobbin, and the end faces of the two magnetic cores inserted in the bobbin abut against each other.

In one embodiment, the magnetic core includes a first section and a second section connected to one end of the first section, and the first sections of the two magnetic cores are respectively inserted into the two winding drums. Two ports, the end faces of the two first sections abut against each other, the two second sections are respectively located on the first side plate and the second side plate, and the end faces of the two second sections face the same.

In one embodiment, the magnetic core is L-shaped, and the first section and the second section are perpendicular to each other.

In one embodiment, the cross section of the first section is circular; and/or the cross section of the second section is rectangular.

In one embodiment, the cross section of the first section is circular, and the cross section diameter of the first section is greater than or equal to 16 mm.

In a third aspect, an electrical equipment is provided, including the above-mentioned transformer.

Beneficial effect

The beneficial effect of the transformer skeleton provided by the embodiments of the present application lies in that by arranging a primary winding groove and a secondary winding groove on the transformer skeleton, the primary winding groove is surrounded by the first side plate, the partition plate and the winding drum. The secondary winding groove is enclosed by the second side plate, the partition board and the winding drum. The ports of the winding drum can be inserted with magnetic cores, the primary winding groove can be neatly and tightly wound with the primary coil, and the secondary winding groove can be neatly and tightly wound with the secondary coil. The transformer skeleton can avoid the existing transformer skeleton. The multi-slot jumper leads to the risk of winding insulation breakdown, and at the same time, the coupling rate between the secondary coil and the primary coil is increased, and can be maintained in a stable range, which can ultimately improve the transmission efficiency of the transformer, and Ensure the stability, safety, reliability and service life of mass production, and can also reduce material costs by an appropriate amount.

The beneficial effects of the transformer and electrical equipment provided by the embodiments of the present application are: by winding the primary coil in the primary winding groove, the secondary coil is wound in the secondary winding groove, and the two magnetic cores are not inserted At the two ports of the bobbin, the end faces of the two magnetic cores inserted in the bobbin are brought into contact with each other, and the two end faces are in close contact with each other, and there is no gap, that is, there is no air gap, so the air gap will not be caused. The winding and cutting of the magnetic lines of force leads to local overheating. Because there is no air gap distance, the phenomenon of poor batch stability caused by inconsistent installation distances is avoided. The transformer with the transformer skeleton and the electrical equipment with the transformer can also ensure the transmission efficiency of the transformer after long-term use.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following description are only of the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

Figure 1 is a three-dimensional assembly diagram of a transformer provided by an embodiment of the application;

Fig. 2 is a three-dimensional exploded view of the transformer of Fig. 1;

Fig. 3 is a three-dimensional assembly diagram of two magnetic cores used in the transformer of Fig. 1.

Embodiments of the present invention

In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and not used to limit the application.

In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical" "," "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and The description is simplified, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "a plurality of" means two or more than two, unless otherwise specifically defined.

In the embodiments of this application, unless otherwise clearly specified and limited, the terms "installation", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection or a fixed connection. Disassembled connection, or integrated; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the embodiments of the present application can be understood according to specific circumstances.

1 to 3, an embodiment of the present application provides a transformer skeleton 100, which is suitable for assembling a magnetic core 200 and a coil to form a transformer, and is particularly suitable for transformers of variable frequency microwave ovens or other electrical equipment. The transformer skeleton 100 has a primary winding groove 101 and a secondary winding groove 102. The transformer skeleton 100 includes a winding drum 10, a first side plate 20 connected to one end of the winding drum 10, and a first side plate 20 connected to the winding drum 10. The second side plate 30 at the other end, and the partition plate 40 connected to the outer surface of the bobbin 10 and located between the first side plate 20 and the second side plate 30, the first side plate 20, the partition plate 40, and the The outer surface of the bobbin 10 between the first side plate 20 and the partition plate 40 encloses the primary winding groove 101, the second side plate 30, the partition plate 40, and the second side plate 30 and the partition plate 40. The outer surface of the bobbin 10 encloses a secondary winding groove 102, and the two ports 11 of the bobbin 10 are respectively used for two magnetic cores 200 to be inserted.

By arranging a primary winding groove 101 and a secondary winding groove 102 in the transformer skeleton 100, the primary winding groove 101 is surrounded by the first side plate 20, the partition 40 and the winding drum 10, and the secondary winding The groove 102 is surrounded by the second side plate 30, the partition 40 and the bobbin 10. The ports 11 of the bobbin 10 can be respectively inserted with the magnetic core 200, the primary winding groove 101 can be neatly and tightly wound with the primary coil, and the secondary winding groove 102 can be neatly and tightly wound with the secondary coil. The transformer skeleton 100 can It avoids the risk of winding insulation breakdown caused by the multi-slot jumper wires of the existing transformer skeleton, and at the same time increases the coupling rate between the secondary coil and the primary coil, and can be maintained in a stable range, which can finally make The transmission efficiency of the transformer is improved, and the stability, safety, reliability and service life of mass production are ensured, and the material cost can be reduced by an appropriate amount.

In another embodiment of the present application, the side of the first side plate 20 away from the partition 40 is provided with a first positioning groove 21 for positioning the magnetic core 200, and the first positioning groove 21 is connected to a port of the bobbin 10 11 is connected; the side of the second side plate 30 away from the partition 40 is provided with a second positioning groove 31 for positioning the other magnetic core 200, and the second positioning groove 31 communicates with the other port 11 of the bobbin 10. The first positioning groove 21 and the second positioning groove 31 are provided to facilitate the positioning and placement of the two magnetic cores 200, improve assembly efficiency, and allow the two magnetic cores 200 to be installed at a predetermined position.

In another embodiment of the present application, the side of the first side plate 20 facing away from the partition 40 is provided with a first positioning wall 22, and a first positioning groove 21 is formed in the first positioning wall 22; the second side plate 30 is facing away from A second positioning wall 32 is provided on one side of the partition 40, and a second positioning groove 31 is formed in the second positioning wall 32. By arranging the positioning wall to form the positioning groove, the structure is easy to shape, and the material cost can be reduced, and the requirement for the positioning and assembly of the magnetic core 200 can be met.

In another embodiment of the present application, the first side plate 20 has a first positioning opening 23 communicating with the first positioning groove 21, and the second side plate 30 has a second positioning opening 33 communicating with the second positioning groove 31. The orientation of a positioning opening 23 and the second positioning opening 33 are the same, and the orientation of the first positioning opening 23 and the axis of the bobbin 10 are perpendicular to each other. After the two L-shaped magnetic cores 200 are installed in the first positioning groove 21 and the second positioning groove 31 respectively, the end faces 202a of the two magnetic cores 200 located outside the bobbin 10 face the same (shown in FIG. 1), so that the two The magnetic circuit of each magnetic core 200 can be connected, so that the coupling rate between the secondary coil and the primary coil is improved, and can be maintained in a stable range, and the transmission efficiency of the transformer is improved.

In another embodiment of the present application, the width of the primary winding groove 101 is less than or equal to 15mm, the width of the secondary winding groove 102 is less than or equal to 8mm, and the distance between the primary winding groove 101 and the secondary winding groove 102 is The gap is less than or equal to 3mm. The width of the primary winding groove 101 refers to the distance between the opposite surfaces of the first side plate 20 and the partition 40 in the axial direction of the winding drum 10. The width of the secondary winding groove 102 refers to the distance between the opposite surface of the second side plate 30 and the partition plate 40 in the axial direction of the winding drum 10. The separation gap between the primary winding groove 101 and the secondary winding groove 102 refers to the gap between the surface of the partition 40 arranged in the primary winding groove 101 and the surface of the partition 40 arranged in the secondary winding groove 102 distance. The above solution has a compact structure and a small space occupation. Mounting the transformer formed by the coil and the magnetic core 200 on the transformer skeleton 100 increases the coupling rate between the secondary coil and the primary coil and can be maintained in a stable range between 0.7 and 0.75, which can effectively improve the transmission efficiency of the transformer . However, in the existing transformer formed by the assembly of the transformer skeleton, the magnetic core and the coil, the coupling ratio between the secondary coil and the primary coil is less than 0.68, which makes the transmission efficiency of the transformer low. Please refer to FIG. 2. In another embodiment of the present application, the inner diameter D of the bobbin 10 is greater than or equal to 16 mm. The bobbin 10 is easy to form, and accordingly, it is also convenient to form the magnetic core 200 that is adapted to the bobbin 10. Moreover, the magnetic core 200 can ensure magnetic saturation, and this solution can save the material cost of the coil, and avoid the situation that the outer diameter of the bobbin 10 is too large and the coil is wound too much and the cost is too high.

In another embodiment of the present application, the inner wall of the bobbin 10 is provided with a plurality of limit ribs 12 extending along the axis of the bobbin 10, and each limit rib 12 is distributed along the circumferential direction of the bobbin 10, and is arranged in the magnetic When the core 200 is inserted into the bobbin 10, the limiting rib 12 abuts against the magnetic core 200 to limit the position of the magnetic core 200. Only by pulling out the magnetic core 200 forcefully, can the magnetic core 200 be separated from the bobbin 10. This solution facilitates the assembly of the magnetic core 200 on the bobbin 10, and the connection is reliable.

In another embodiment of the present application, the bobbin 10, the first side plate 20, the second side plate 30, and the partition 40 are integrally formed. The structure is easy to manufacture, specifically, injection molding can be used, which is convenient for mass production.

In another embodiment of the present application, the bobbin 10 is divided into a first bobbin 103 and a second bobbin 104, the partition 40 is divided into a first partition 401 and a second partition 402, and the first winding drum The barrel 103, the first side plate 20, and the first partition 401 are an integral structure, the second winding barrel 104, the second side plate 30, and the second partition 402 are an integral structure, and the first partition 401 is connected to the first partition 401. On the two partitions 402, they are separated from each other and connected to each other. The structure is easy to make. Specifically, the structure including the first bobbin 103, the first side plate 20 and the first partition 401, the structure including the second bobbin 104, the second side plate 30 and the second partition 402, are all Injection molding can be used, and then the two structural parts are assembled, which is also convenient for mass production.

Further referring to Fig. 1, based on the above-mentioned transformer structure, the width W1 of the primary winding groove 101 (the distance between the opposite surface of the first side plate 20 and the first partition 401 in the axis direction of the winding drum 10) is less than or equal to 15 mm. The width W2 of the secondary winding groove 102 (the distance between the opposing surface of the second side plate 30 and the second partition 402 in the axial direction of the winding drum 10) is less than or equal to 8mm, the primary winding groove 101 and the secondary winding groove The separation gap W3 between 102 (the distance between the surface of the first partition 401 close to the primary winding groove 101 and the surface of the second partition 402 close to the secondary winding groove 102) is less than or equal to 3 mm.

1 to 3, in another embodiment of the present application, a transformer is provided, including the above-mentioned transformer skeleton 100, two magnetic cores 200, and a primary coil (not shown in the figure) wound in the primary winding groove 101 Shown) and the secondary coil (not shown) wound in the secondary winding slot 102, the two magnetic cores 200 are inserted into the two ports 11 of the bobbin 10, and the two magnetic cores 200 are inserted into the The end surface 201a in the bobbin 10 abuts against each other.

By winding the primary coil in the primary winding slot 101 and the secondary coil in the secondary winding slot 102, the two magnetic cores 200 are inserted into the two ports 11 of the bobbin 10, so that the two Two magnetic cores 200 are inserted into the end surface 201a of the bobbin 10 to abut against each other. The two end surfaces 201a are in close contact with each other. There is no gap, that is, there is no air gap, which will not cause the winding around the air gap to cut the magnetic lines of force. The phenomenon of local overheating, because there is no air gap distance, also avoids the phenomenon of poor batch stability caused by inconsistent installation distance.

In another embodiment of the present application, the primary coil and the secondary coil are both wound on the transformer skeleton 100 by a transformer winding machine. The transformer winding machine can wind the primary coil neatly and tightly in the primary winding groove 101. The secondary coil is neatly and tightly wound in the secondary winding groove 102 to ensure the safety of the transformer in use. It avoids the situation that the transformer skeleton in the prior art needs to be equipped with multiple secondary winding grooves and there are jumper wires.

In another embodiment of the present application, the magnetic core 200 includes a first section 201 and a second section 202 connected to one end of the first section 201, and the first sections 201 of the two magnetic cores 200 are respectively inserted into the bobbin 10 The two ports 11 of the two first sections 201 abut against each other, the two second sections 202 are respectively located on the first side plate 20 and the second side plate 30, and the end surfaces 202a of the two second sections 202 face the same . The magnetic core 200 is easy to shape, easy to assemble on the transformer skeleton 100, and improves the coupling ratio between the secondary coil and the primary coil, and can be maintained in a stable range, which can effectively improve the transmission efficiency of the transformer.

In another embodiment of the present application, the magnetic core 200 is L-shaped, and the first section 201 and the second section 202 are perpendicular to each other. The magnetic core 200 is easy to form. When the first section 201 is inserted into the bobbin 10, the two second sections 202 abut on the first side plate 20 and the second side plate 30 respectively, so that the magnetic core 200 is easily assembled on the transformer skeleton 100. At the same time, since the magnetic core 200 is L-shaped, when the end faces 201a of the first section 201 inserted in the bobbin 10 abut against each other, the ends of the two second sections 202 are still spaced apart to form the magnetic core 200 The necessary air gap between to ensure the performance of the transformer.

In another embodiment of the present application, the cross section of the first section 201 is circular; the cross section of the second section 202 is rectangular. When the first section 201 is inserted into the bobbin 10, the two first sections 201 fit into the inner cavity of the bobbin 10, and the circular end faces 201a of the two first sections 201 abut and cooperate to make the magnetic The two second sections 202 with a rectangular cross section are respectively abutted on the first side plate 20 and the second side plate 30, so that the magnetic core 200 can be easily assembled on the transformer skeleton 100.

Please refer to FIG. 2. In another embodiment of the present application, the cross section of the first section 201 is circular, and the cross-sectional diameter D'of the first section 201 is greater than or equal to 16 mm. The magnetic core 200 is easy to form, and accordingly, it is also convenient to form the bobbin 10 adapted to the magnetic core 200. Moreover, the magnetic core 200 can ensure magnetic saturation, and this solution can save the material cost of the coil, and avoid the situation that the outer diameter of the bobbin 10 is too large and the coil is wound too much to cause the cost to be too high.

Please refer to FIG. 1 to FIG. 3. In another embodiment of the present application, there is provided an electrical equipment including the above-mentioned transformer. Specifically, the electrical equipment may be a frequency conversion microwave oven or other electrical equipment.

By making the end faces 201a of the two magnetic cores 200 inserted in the bobbin 10 abut against each other, the two end faces 201a are in close contact, and there is no gap, that is, there is no air gap, and it will not cause the winding cutting around the air gap. The magnetic field lines in turn lead to the phenomenon of local overheating. Because there is no air gap distance, the phenomenon of poor batch stability caused by inconsistent installation distances is avoided. The transformer with the transformer skeleton 100 and the electrical equipment with the transformer can also ensure the transmission efficiency of the transformer after long-term use.

The above are only preferred embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in the protection scope of this application. Inside.

Claims

The transformer skeleton is characterized in that the transformer skeleton has a primary winding groove and a secondary winding groove, and the transformer skeleton includes a winding drum, a first side plate connected to one end of the winding drum, and A second side plate at the other end of the bobbin, and a partition plate connected to the outer surface of the bobbin and located between the first side plate and the second side plate, the first One side plate, the partition plate, and the outer surface of the bobbin between the first side plate and the partition plate enclose the primary winding groove, and the second side plate, the The partition and the outer surface of the bobbin located between the second side plate and the partition enclose the secondary winding groove, and the two ports of the bobbin are respectively supplied with two magnetic Core insertion.
The transformer skeleton of claim 1, wherein the side of the first side plate away from the partition plate is provided with a first positioning groove for positioning the magnetic core, and the first positioning groove is connected to the One port of the bobbin is connected;

A side of the second side plate away from the partition plate is provided with a second positioning groove for positioning another magnetic core, and the second positioning groove is communicated with the other port of the bobbin.
The transformer skeleton of claim 2, wherein a first positioning wall is provided on the side of the first side plate away from the partition, and the first positioning groove is formed in the first positioning wall ；

A second positioning wall is provided on the side of the second side plate away from the partition, and the second positioning groove is formed in the second positioning wall.
The transformer skeleton of claim 2, wherein the first side plate has a first positioning opening communicating with the first positioning groove, and the second side plate has a first positioning opening communicating with the second positioning groove. The orientation of the first positioning opening and the second positioning opening are the same, and the orientation of the first positioning opening and the axis of the bobbin are perpendicular to each other.
The transformer skeleton of claim 1, wherein the width of the primary winding groove is less than or equal to 15mm, the width of the secondary winding groove is less than or equal to 8mm, and the primary winding groove is connected to the The gap between the secondary winding grooves is less than or equal to 3mm.
The transformer skeleton according to any one of claims 1 to 5, wherein the inner diameter of the bobbin is greater than or equal to 16 mm.
The transformer skeleton according to any one of claims 1 to 5, wherein the bobbin, the first side plate, the second side plate and the partition are integrally formed; or, The reel is divided into a first reel and a second reel, the partition is divided into a first partition and a second partition, the first reel, the first side plate and The first partition is an integrally formed structure, the second bobbin, the second side plate, and the second partition are an integrally formed structure, and the first partition is connected to the second partition. On the board.
A transformer, characterized by comprising the transformer skeleton according to any one of claims 1 to 7, two magnetic cores, a primary coil wound in the primary winding groove, and a secondary winding For the secondary coil in the slot, the two magnetic cores are respectively inserted into the two ports of the bobbin, and the end faces of the two magnetic cores inserted in the bobbin abut against each other.
The transformer according to claim 8, wherein the magnetic core comprises a first section and a second section connected to one end of the first section, and the first sections of the two magnetic cores are respectively inserted in For the two ports of the bobbin, the end faces of the two first sections abut against each other, the two second sections are respectively located on the first side plate and the second side plate, and the two second sections The end faces of the segments face the same.
9. The transformer of claim 9, wherein the magnetic core is L-shaped, and the first section and the second section are perpendicular to each other.
The transformer according to claim 9, wherein the cross section of the first section is circular; and/or the cross section of the second section is rectangular.
The transformer according to claim 9, wherein the cross section of the first section is circular, and the diameter of the section of the first section is greater than or equal to 16 mm.
The electrical equipment is characterized by comprising the transformer according to any one of claims 8 to 12.