CN218100914U - Magnetic core structure and transformer - Google Patents
Magnetic core structure and transformer Download PDFInfo
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- CN218100914U CN218100914U CN202222184616.1U CN202222184616U CN218100914U CN 218100914 U CN218100914 U CN 218100914U CN 202222184616 U CN202222184616 U CN 202222184616U CN 218100914 U CN218100914 U CN 218100914U
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Abstract
This application is applicable to transformer technical field, provides a magnetic core structure and transformer, includes: a magnetic core, the magnetic core comprising: the bottom plate comprises a central part, a first end part and a second end part, wherein the first end part and the second end part are connected to two opposite sides of the central part; a center pillar connected to the central portion; a first side column connected to the first end; the second side column is connected to the second end part; the effective sectional area of the second side column is greater than or equal to the sum of the effective sectional area of the first side column and the effective sectional area of the middle column; or the height of the first side column is less than or equal to that of the second side column, and the height of the middle column is less than or equal to that of the second side column; this application sets up simultaneously around the second primary who locates first limit post and center pillar to this forms resonance inductance and establishes ties in the transformer, with reaching the effect of integrating resonance inductance in the transformer, has reduced the volume of transformer, has realized the miniaturization of transformer.
Description
Technical Field
The application relates to the technical field of transformers, in particular to a magnetic core structure and a transformer.
Background
The transformer is a magnetic component commonly used in various electrical equipment, and adjusts different voltages by using the principle of conversion induction of electric energy and magnetic energy, so that the transformer can reach the applicable range of the electrical equipment. In a power supply system such as a switching power supply, a resonant circuit has a wide application.
At present, under the traditional resonant circuit architecture, there are two resonant architecture designs:
1. the transformer and the resonance inductor are separately designed, and the size of the transformer and the resonance inductor is large, so that the miniaturization requirements of the designed product and the magnetic element cannot be met;
2. the leakage inductance of the transformer is used as an auxiliary inductance, the inductance value is not easy to control accurately, and the requirement of accurate efficiency cannot be met.
SUMMERY OF THE UTILITY MODEL
To above-mentioned problem, the application provides a new magnetic core structure and transformer, has solved in the prior art at least that transformer and resonance inductance discrete design lead to the product volume great, the difficult accurate control's of transformer leakage inductance value problem.
The embodiment of the application provides a magnetic core structure, includes: a magnetic core, the magnetic core comprising:
a base plate including a central portion and first and second end portions connected to opposite sides of the central portion;
a center pillar connected to the central portion;
a first side post connected to the first end;
a second side post connected to the second end;
the effective sectional area of the second side column is less than or equal to the sum of the effective sectional area of the first side column and the effective sectional area of the middle column; or
The height of the first side column is smaller than or equal to that of the second side column, and the height of the middle column is smaller than that of the second side column.
In an embodiment, the first side column includes a first arc-shaped surface, the first arc-shaped surface is disposed on a side of the first side column departing from the central column, and the first arc-shaped surface is curved in a direction departing from the central column.
In an embodiment, the first side pillar includes a second arc-shaped surface, the second arc-shaped surface is disposed on a side of the first side pillar facing the central pillar, and the second arc-shaped surface is curved in a direction away from the central pillar; the second side column comprises a third arc-shaped surface, the third arc-shaped surface is arranged on one side, facing the middle column, of the second side column, and the third arc-shaped surface is bent towards the direction departing from the middle column; the second arc-shaped surface, the third arc-shaped surface and the side wall of the center pillar jointly enclose a winding slot.
In an embodiment, the magnetic core structure includes two magnetic cores, two magnetic cores are disposed oppositely, and the two center pillars, the two first side pillars, and the two second side pillars are disposed oppositely.
The embodiment of the present application further provides a transformer, including:
the magnetic core structure;
the first primary coil is wound on the center pillar;
the second primary coil is annular and is wound on the middle column and the first side column simultaneously.
And the secondary coil is wound on the center post.
In an embodiment, the first primary coil is adjacent to the second primary coil.
In one embodiment, the magnetic core structure comprises two oppositely arranged magnetic cores, two middle pillars are opposite and form a magnetic pillar, and two first side pillars are opposite and form a first side wall; the first primary coil and the secondary coil are wound on the magnetic column; the second primary coil is wound on the magnetic column and the first side wall at the same time.
In one embodiment, a first air gap exists between two of the center pillars.
In an embodiment, a second air gap exists between two of the first side legs.
In an embodiment, magnetic lines of force generated by the first primary coil and the second primary coil wound around the center pillar are respectively coupled with the secondary coil.
The magnetic core structure that this application embodiment provided leads to the great problem of product volume to make improvement design to transformer and resonance inductance discrete design in the prior art, makes the effective sectional area of second side post be greater than the effective sectional area of first side post and the effective sectional area sum of center pillar, or changes the center pillar, the length of the relative second side post of first side post to make first side post and center pillar can cooperate the coil to constitute resonance inductance and establish ties in the transformer, in order to reach the effect of integrateing resonance inductance into the transformer.
The vary voltage that this application embodiment provided makes improved design to the not wayward problem of inductance value that utilizes transformer leakage inductance to lead to as resonant inductance among the prior art, with a secondary coil simultaneously around establishing with center pillar and side pillar to make the side pillar as transformer integrated inductance's partial magnetic circuit and form resonant inductance, so that the inductance value is controllable.
The transformer and the resonance inductor are designed in a separated mode to solve the problem that the product size is large due to the fact that a transformer and the resonance inductor are designed in the prior art; the second primary winding that sets up simultaneously around locating first side post and center pillar to this forms resonance inductance and establishes ties in the transformer, with reaching the effect of integrating resonance inductance in the transformer, has reduced the volume of transformer, has realized the miniaturization of transformer.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic perspective view of a magnetic core in a magnetic core structure provided in an embodiment of the present application.
Fig. 2 is a front view of the magnetic core in the magnetic core structure shown in fig. 1.
Fig. 3 isbase:Sub>A schematic cross-sectional view atbase:Sub>A-base:Sub>A in fig. 2.
Fig. 4 is a schematic front view of a magnetic core structure according to an embodiment of the present application.
Fig. 5 is a schematic cross-sectional view of the magnetic core structure shown in fig. 4.
Fig. 6 is a schematic front view of a magnetic core structure according to another embodiment of the present application.
Fig. 7 is a schematic front view of a magnetic core structure according to another embodiment of the present application.
Fig. 8 is a schematic front view of a magnetic core structure according to still another embodiment of the present application.
Fig. 9 is a schematic perspective view of a transformer according to an embodiment of the present application.
Fig. 10 is an exploded view of the transformer shown in fig. 7.
The designations in the figures mean:
100. a magnetic core structure;
10. a magnetic core; 11. a base plate; 111. a central portion; 112. a first end portion; 113. a second end portion; 12. a center pillar; 13. a first side column; 131. a first arc-shaped surface; 132. a second arcuate surface; 14. a second side column; 141. a third arc-shaped surface; 15. a winding slot;
20. a magnetic column; 201. a first air gap;
30. a first side wall; 301. a second air gap;
200. a transformer;
40. a first primary coil;
50. a secondary coil;
60. a second primary coil.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings, which are examples. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, are not to be construed as limiting the patent. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of technical features. The meaning of "plurality" is two or more unless explicitly defined otherwise.
It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.
The transformer is a magnetic component commonly used in various electrical equipment, and adjusts different voltages by using the principle of conversion induction of electric energy and magnetic energy, so that the transformer can reach the applicable range of the electrical equipment. In a power supply system such as a switching power supply, a resonant circuit has a wide application.
At present, under the traditional resonant circuit architecture, there are two resonant architecture designs:
1. the transformer and the resonance inductor are separately designed, and the size of the transformer and the resonance inductor is large, so that the miniaturization requirements of the designed product and the magnetic element cannot be met;
2. the leakage inductance of the transformer is used as an auxiliary inductance, the inductance value is not easy to control accurately, and the requirement of accurate efficiency cannot be met.
This application provides a magnetic core structure and transformer from this, makes the effective sectional area of first side post be less than the effective sectional area of second side post, or changes the length of center pillar, the relative second side post of first side post to make first side post can cooperate the coil to constitute resonant inductance, in order to reach the effect with the integrated income transformer of resonant inductance, realize transformer and resonant inductance integrate, the miniaturization and realize the controllable effect of inductance value.
For explaining the technical solution of the present application, the following description is made with reference to the specific drawings and examples.
Referring to fig. 1 to 6, an embodiment of a first aspect of the present application provides a magnetic core structure 100, which includes a magnetic core 10, where the magnetic core 10 includes a bottom plate 11, a center pillar 12, a first side pillar 13, and a second side pillar 14.
The bottom plate 11 is used for providing a fixed foundation for the center pillar 12, the first side pillar 13 and the second side pillar 14, and the bottom plate 11 is also used for conducting magnetism, the bottom plate 11 includes a central portion 111 and a first end portion 112 and a second end portion 113, the first end portion 112 and the second end portion 113 are respectively disposed on two opposite sides of the central portion 111, so as to provide a fixed foundation for the center pillar 12, the first side pillar 13 and the second side pillar 14.
The center pillar 12 is connected to the center portion 111, the first side pillar 13 is connected to the first end portion 112, and the second side pillar 14 is connected to the second end portion 113, that is, the first side pillar 13 and the second side pillar 14 are located on opposite sides of the center pillar 12.
Referring to fig. 4 and 5, the magnetic core structure 100 may form a closed magnetic circuit by arranging two magnetic cores 10 oppositely, in this case, an EE-type magnetic core structure is formed, in this case, the center pillar 12, the first side pillar 13 and the second side pillar 14 are located on the same side of the bottom plate 11 and all extend in the same direction, the center pillars 12 on the two magnetic cores 10 arranged oppositely extend oppositely, the two first side pillars 13 extend oppositely and abut against each other, the two center pillars 12 and the two first side pillars 13 form a closed magnetic circuit, the closed magnetic circuit is used for conducting magnetism, and when a coil is wound around any one of the two center pillars 12, the coil is electrified, so that a magnetic field is formed in the closed magnetic circuit formed by the two center pillars 12 and the two first side pillars 13; the two second side columns 14 extend to be abutted against each other, the two center pillars 12 and the two second side columns 14 form a closed magnetic circuit for magnetic conduction, and when the coil is wound around any one of the two center pillars 12, the coil is energized to form a magnetic field in the closed magnetic circuit formed by the two center pillars 12 and the two second side columns 14.
Referring to fig. 6, the magnetic core structure 100 may also form a closed magnetic circuit by the magnetic core 10 cooperating with the cover plate, the cover plate is disposed on a side of the center pillar 12 away from the bottom plate 11, and the cover plate abuts against the second side pillar 14, at this time, an EI type magnetic core structure is formed, at this time, the center pillar 12, the bottom plate 11, the first side pillar 13, and the cover plate may form a closed magnetic circuit, the center pillar 12, the bottom plate 11, the second side pillar 14, and the cover plate may also form a closed magnetic circuit, both of the two closed magnetic circuits are used for magnetic conduction, and after the coil is wound around the center pillar 12 and energized, a magnetic field is formed in the two closed magnetic flows.
It is understood that core structure 100 based on core 10 may also form an EC type core structure, an EF type core structure, or other various transformer core structures.
The effective cross-sectional area of the second side leg 14 is equal to or larger than the sum of the effective cross-sectional area of the first side leg 13 and the effective cross-sectional area of the center leg 12 because the magnetic flux in the magnetic core 10 is related to the minimum of the effective cross-sectional area of the center leg 12, the effective cross-sectional area of the first side leg 13, and the effective cross-sectional area of the second side leg 14, and this arrangement enables the magnetic flux in the magnetic core 10 to be influenced by the effective cross-sectional area of the center leg 12 or the effective cross-sectional area of the first side leg 13, so that part of the magnetic flux is not passed through the magnetic core 10 and is returned by air closure, and resonance inductance is formed by the part of the magnetic flux.
The beneficial effect of this embodiment lies in: the effective cross-sectional area of the second side column 14 is larger than the sum of the effective cross-sectional area of the first side column 13 and the effective cross-sectional area of the center column 12, so that the first side column 13 and the center column 12 can form a resonant inductor with a coil and are connected in series with the transformer 200, thereby achieving the effect of integrating the resonant inductor into the transformer 200.
Referring to fig. 1 and 2, in the embodiment, the middle pillar 12, the first side pillar 13, and the second side pillar 14 are perpendicular to the bottom plate 11, so that the two bottom plates 11 can face each other when the two magnetic cores 10 are oppositely disposed, thereby reducing the occupied space, improving the space utilization rate, and reducing the manufacturing difficulty.
Referring to fig. 3, in an embodiment, the effective cross-sectional area of the first side leg 13 is smaller than that of the second side leg 14, the coil is wound around the middle leg 12 and the first side leg 13, and the magnetic lines of force of the magnetic circuit passing through the first side leg 13 do not participate in the primary-secondary coupling of the transformer 200 and form an independent primary-side inductance, which is a resonant inductance.
Referring to fig. 1 to fig. 3, in an embodiment, the first side pillar 13 includes a first arc-shaped surface 131, the first arc-shaped surface 131 is disposed on a side of the first side pillar 13 away from the central pillar 12, and the first arc-shaped surface 131 is bent toward a direction away from the central pillar 12, that is, a center of a circle of the first arc-shaped surface 131 is on a side of the first side pillar 13 facing the central pillar 12, the arrangement is such that the coil is wound around the central pillar 12 and the first side pillar 13 at the same time, specifically, when the coil is wound around the central pillar 12 and the first side pillar 13 at the same time, a part of the coil abuts against the first arc-shaped surface 131, there is no corner angle in the arc-shaped first arc-shaped surface 131, and the coil can be effectively prevented from being worn by the corner angle.
Referring to fig. 1 to fig. 3, in an embodiment, the first side pillar 13 further includes a second arc-shaped surface 132, the second arc-shaped surface 132 is disposed on a side of the first side pillar 13 facing the center pillar 12, and the second arc-shaped surface 132 is curved in a direction away from the center pillar 12, that is, a center of the second arc-shaped surface 132 is on a side of the first side pillar 13 facing the center pillar 12; optionally, the second arc surface 132 and the first arc surface 131 are parallel to each other.
The second side column 14 includes a third arc-shaped surface 141, the third arc-shaped surface 141 is disposed on a side of the second side column 14 facing the center column 12, and the third arc-shaped surface 141 is curved away from the center column 12, i.e., a center of the third arc-shaped surface 141 is located on a side of the second side column 14 facing the center column 12; optionally, the diameter of the second arc-shaped surface 132 is equal to the diameter of the third arc-shaped surface 141.
In this embodiment, the second arc-shaped surface 132 and the third arc-shaped surface 141 are both parallel to the side wall of the center pillar 12, and the cross-sectional area of the winding slot 15 can be made equal everywhere by this arrangement, that is, the area of the window is made equal everywhere, so as to effectively utilize the space.
Referring to fig. 4 and 5, an embodiment of a second aspect of the present application provides a magnetic core structure 100, which includes a magnetic core 10, the magnetic core 10 including a bottom plate 11, a center pillar 12, a first side pillar 13, and a second side pillar 14, wherein:
the height of the first side column 13 is equal to the height of the second side column 14, and the height of the center column 12 is smaller than the height of the first side column 13, that is, the height of the center column 12 is also smaller than the height of the second side column 14.
When the magnetic core structure 100 forms a closed magnetic circuit by matching the magnetic core 10 with the cover plate, the first side column 13 abuts against the cover plate, and the second side column 14 also abuts against the cover plate, at this time, the cover plate is arranged on one side of the central column 12, which is far away from the bottom plate 11, and the cover plate abuts against the second side column 14, at this time, the central column 12 is not in contact with the cover plate, and a space between the central column 12 and the cover plate is used for increasing magnetic resistance, so that magnetic flux passing through the central column 12 is adjusted, part of the magnetic flux is not returned through the magnetic core 10 but through air closure, and resonance inductance is formed through the part of the magnetic flux.
When the magnetic core structure 100 forms a closed magnetic circuit by arranging two magnetic cores 10 oppositely, two first side pillars 13 are abutted against each other, and two second side pillars 14 are abutted against each other, when the two center pillars 12 are opposite but not in contact, the space between the two center pillars 12 is used for increasing the magnetic resistance between the two center pillars 12, thereby adjusting the magnetic flux passing on the center pillars 12, enabling part of the magnetic flux to pass through the air closed return without passing through the magnetic cores 10, and forming resonant inductance by the part of the magnetic flux.
It will be appreciated that if the distance between the two center pillars 12 is too large, this will result in too strong stray magnetic field in the coil, too large eddy currents and also greater losses, so the difference between the height of the center pillar 12 and the height of the first side pillar 13 should be balanced between avoiding magnetic saturation and avoiding too large losses.
Referring to fig. 7, in another embodiment, the height of the center pillar 12 is equal to the height of the second side pillar 14, and the height of the first side pillar 13 is smaller than the height of the center pillar 12, i.e. the height of the first side pillar 13 is also smaller than the height of the second side pillar 14.
When the magnetic core structure 100 forms a closed magnetic circuit by arranging two magnetic cores 10 oppositely, two second side columns 14 are abutted against each other, and two middle columns 12 are abutted against each other, at this time, two first side columns 13 are opposite but not in contact, and the space between the two first side columns 13 is used for increasing the magnetic resistance between the two first side columns 13, so that the magnetic flux passing on the first side columns 13 is adjusted, part of the magnetic flux is closed and returned through air without passing through the magnetic cores 10, and resonance inductance is formed by the part of the magnetic flux.
When the magnetic core structure 100 forms a closed magnetic circuit by matching the magnetic core 10 with the cover plate, the second side column 14 abuts against the cover plate, the middle column 12 also abuts against the cover plate, at this time, the first side column 13 is not in contact with the cover plate, and the space between the first side column 13 and the cover plate is used for increasing the magnetic resistance, so that the magnetic flux passing through the first side column 13 is adjusted, part of the magnetic flux is closed and returned through air without passing through the magnetic core 10, and resonance inductance is formed by the part of the magnetic flux.
Referring to fig. 8, in a further embodiment, the height of the center leg 12 is less than the height of the second side leg 14, and the height of the first side leg 13 is also less than the height of the second side leg 14.
When the magnetic core structure 100 forms a closed magnetic circuit by arranging two magnetic cores 10 oppositely, two second side columns 14 are abutted with each other, and at this time, two center columns 12 are opposite but not in contact, a space between the two center columns 12 is used for increasing the magnetic resistance between the two center columns 12, two first side columns 13 are opposite but not in contact, and a space between the two first side columns 13 is used for increasing the magnetic resistance between the two first side columns 13, so that the magnetic flux passing on the first side columns 13 is adjusted, part of the magnetic flux is closed and returned through air without passing through the magnetic cores 10, and resonance inductance is formed by the part of the magnetic flux.
When the magnetic core structure 100 forms a closed magnetic circuit by matching the magnetic core 10 with the cover plate, the second side column 14 abuts against the cover plate, at this time, the first side column 13 is not in contact with the cover plate, the space between the first side column 13 and the cover plate is used for increasing the magnetic resistance, so as to adjust the magnetic flux passing through the first side column 13, the center column 12 is not in contact with the cover plate, and the space between the center column 12 and the cover plate is used for increasing the magnetic resistance, so as to adjust the magnetic flux passing through the center column 12, so that part of the magnetic flux does not pass through the magnetic core 10 but passes through the air to be closed and returned, and the resonance inductance is formed by the part of the magnetic flux.
The embodiment of the second aspect of the present application has the following beneficial effects: by changing the relative lengths of the center leg 12, the first side leg 13 and the second side leg 14, part of the magnetic flux is not passed through the magnetic core 10 but is closed and returned through the air, and the resonance inductance is formed by the part of the magnetic flux and is connected in series with the transformer 200, so that the effect of integrating the resonance inductance into the transformer 200 is achieved.
Referring to fig. 9 and 10, an embodiment of the third aspect of the present application further provides a transformer 200, which includes a magnetic core structure 100, and a first primary coil 40, a second primary coil 60, and a secondary coil 50, where:
the first primary coil 40 is wound around the center pillar 12; the second primary coil 60 is wound around the center pillar 12 and the first side pillar 13 at the same time, the second primary coil 60 is annular, and the magnetic lines of force of the magnetic circuit passing through the first side pillar 13 do not participate in the coupling between the second primary coil 60 and the secondary coil 50 in the transformer 200, but form a resonant inductor by being wound around the second primary coil 60 and the first side pillar 13, so that the resonant inductor is integrated in the transformer 200; the secondary coil 50 is wound around the center leg 12.
In this embodiment, the magnetic lines generated by the first primary coil 40 are coupled to the secondary coil 50, and the magnetic lines generated by the second primary coil 60 wound around the center leg 12 are also coupled to the secondary coil 50.
In the present embodiment, the first primary coil 40 is adjacent to the second primary coil 60; in another embodiment, the first primary coil 40 and the second primary coil 60 can be alternatively wound; this arrangement can reduce the magnetic leakage between the first primary coil 40 and the second primary coil 60.
Referring to fig. 4, 5, 7 and 8, in an embodiment, the magnetic core structure 100 includes two oppositely disposed magnetic cores 10, two middle pillars 12 are opposite to each other and form a magnetic pillar 20, and two first side pillars 13 are opposite to each other and form a first side wall 30 after the two magnetic cores 10 are oppositely disposed.
The first primary coil 40 is wound on the magnetic pole 20; the second primary coil 60 is wound around the magnetic pillar 20 and the first sidewall 30 at the same time, and the second primary coil 60 is annular; the secondary coil 50 is wound around the magnetic pole 20.
Referring to fig. 4, 5, 7 and 8, in the present embodiment, a first air gap 201 exists between two center pillars 12, and the arrangement corresponds to the arrangement in the second aspect of the present application, specifically, when the height of the center pillar 12 is less than the height of the second side pillar 14, and the height of the first side pillar 13 is equal to the height of the second side pillar 14, the first air gap 201 is formed in the magnetic pillar 20; when the height of the first side pillar 13 is smaller than the height of the second side pillar 14, a second air gap 301 is formed in the first sidewall 30.
The effect of the first air gap 201 and the second air gap 301 is to increase the magnetic reluctance in the magnetic pillar 20 and the first sidewall 30, so that part of the magnetic flux can pass through the second primary coil 60 and form a resonant inductance; meanwhile, the arrangement of the first air gap 201 and the second air gap 301 can effectively avoid the magnetic saturation phenomenon.
It can be understood that, in the magnetic core structure 100 provided in the embodiment of the present application, the first air gap 201 or the second air gap 301 may exist, or the air gap may not exist, or both the first air gap 201 and the second air gap 301 may exist.
It can be understood that if the heights of the first air gap 201 and the second air gap 301 are too high, the stray magnetic field in the coil will be too strong, the eddy current will be too large, and the loss will be larger, so the heights of the first air gap 201 and the second air gap 301 should be balanced between avoiding magnetic saturation and avoiding too large loss.
In this embodiment, the first primary coil 40 and the second primary coil 60 are wound on the same center pillar 12, the secondary coil 50 and the first primary coil 40 are wound on different center pillars 12, and the first air gap 201 is located at one side of the secondary coil 50, so that leakage flux can return to the first primary coil 40 through the second primary coil 60 by air closing, thereby improving leakage inductance and reducing the harm caused by leakage inductance.
The embodiment of the third aspect of the application has the advantages that: the winding mode of the first primary coil 40 and the second primary coil 60 is provided, the effect of integrating the resonance inductor into the transformer 200 is achieved by simultaneously winding the second primary coil 60 around the center pillar 12 and the first side pillar 13, the volume of the transformer 200 is reduced, and the miniaturization of the transformer 200 is realized; meanwhile, the first air gap 201 and the second air gap 301 are arranged, so that magnetic leakage of the resonant inductor can be better processed, and magnetic saturation is prevented.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments can be modified, or technical features of the central portion can be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (10)
1. A magnetic core structure, comprising: a magnetic core, the magnetic core comprising:
a base plate including a central portion and first and second end portions connected to opposite sides of the central portion;
a center pillar connected to the central portion;
a first side post connected to the first end;
a second side post connected to the second end;
the effective sectional area of the second side column is larger than or equal to the sum of the effective sectional area of the first side column and the effective sectional area of the middle column; or
The height of the first side column is smaller than or equal to that of the second side column, and the height of the middle column is smaller than or equal to that of the second side column.
2. The magnetic core structure of claim 1, wherein the first side leg includes a first arc-shaped surface, the first arc-shaped surface is disposed on a side of the first side leg facing away from the center leg, and the first arc-shaped surface is curved in a direction facing away from the center leg.
3. A magnetic core structure according to claim 1 or 2, characterized in that the first side leg comprises a second arc-shaped surface, which is provided on a side of the first side leg facing the central leg, the second arc-shaped surface being curved in a direction away from the central leg; the second side column comprises a third arc-shaped surface, the third arc-shaped surface is arranged on one side, facing the middle column, of the second side column, and the third arc-shaped surface is bent towards the direction departing from the middle column; the second arc-shaped surface, the third arc-shaped surface and the side wall of the center pillar jointly enclose a winding slot.
4. The magnetic core structure of claim 1, wherein the magnetic core structure comprises two magnetic cores, the two magnetic cores are disposed opposite to each other, and the two center pillars, the two first side pillars, and the two second side pillars are disposed opposite to each other.
5. A transformer, comprising:
the magnetic core structure of any of claims 1-4;
the first primary coil is wound on the center pillar;
the second primary coil is annular and is wound on the middle column and the first side column simultaneously;
and the secondary coil is wound on the center post.
6. The transformer of claim 5, wherein the first primary coil is adjacent to the second primary coil.
7. The transformer of claim 5 or 6, wherein the core structure comprises two oppositely disposed cores, two central legs being opposed and forming a magnetic column, two first side legs being opposed and forming a first side wall; the first primary coil and the secondary coil are wound on the magnetic column; the second primary coil is wound on the magnetic column and the first side wall at the same time.
8. The transformer of claim 7, wherein a first air gap exists between the two center legs.
9. The transformer of claim 7, wherein a second air gap exists between the two first side legs.
10. The transformer of claim 5, wherein the magnetic lines of force generated by the first primary coil and the second primary coil around the portion of the center leg are coupled to the secondary coil, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202222184616.1U CN218100914U (en) | 2022-08-18 | 2022-08-18 | Magnetic core structure and transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222184616.1U CN218100914U (en) | 2022-08-18 | 2022-08-18 | Magnetic core structure and transformer |
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| CN218100914U true CN218100914U (en) | 2022-12-20 |
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| CN202222184616.1U Active CN218100914U (en) | 2022-08-18 | 2022-08-18 | Magnetic core structure and transformer |
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- 2022-08-18 CN CN202222184616.1U patent/CN218100914U/en active Active
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