CN112652438A - Transformer and inductance matrix integrated structure - Google Patents
Transformer and inductance matrix integrated structure Download PDFInfo
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- CN112652438A CN112652438A CN202011543020.5A CN202011543020A CN112652438A CN 112652438 A CN112652438 A CN 112652438A CN 202011543020 A CN202011543020 A CN 202011543020A CN 112652438 A CN112652438 A CN 112652438A
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- 238000004804 winding Methods 0.000 claims abstract description 181
- 230000010354 integration Effects 0.000 claims abstract description 3
- 230000006698 induction Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 18
- 230000004907 flux Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F2038/006—Adaptations of transformers or inductances for specific applications or functions matrix transformer consisting of several interconnected individual transformers working as a whole
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Abstract
The invention discloses a transformer and inductor matrix type integrated structure, and belongs to the technical field of power electronics. The transformer and inductor matrix type integrated structure is composed of a pair of magnetic cores at least comprising 4 magnetic columns, a primary winding and a secondary winding; the transformer and the inductor can be integrated in one magnetic core, the integration of the winding and the flexible configuration of the winding structure can be realized, and any turn ratio of the transformer and any inductance ratio can be realized. The magnetic core loss can be reduced, the efficiency is improved, and meanwhile, the volume and the weight of the power magnetic part are greatly reduced by the magnetic core integrated structure and the winding integrated structure, so that the power density of the converter is improved.
Description
Technical Field
The invention relates to a transformer and inductor matrix type integrated structure, and belongs to the technical field of power electronics.
Background
In recent years, large-scale integrated circuits are developed more and more rapidly, so that electronic systems such as computers and communication have more and more requirements on DC/DC multi-module series-parallel power supplies with low power supply voltage and large power supply current. Having a modular power supply with a high power density is one of the main objectives of research, where it is critical that the converter still has a high efficiency at a high switching frequency. The transformer and the inductor are important elements in a direct current power supply, and the volume and the loss of the transformer and the inductor account for a large proportion of the power supply working at high frequency. Therefore, it is important to integrate the transformer and the inductor into one magnetic core by using a magnetic integration technology to reduce the size and loss of the converter and improve the power density.
Disclosure of Invention
The purpose of the invention is as follows:
the invention aims to overcome the defects in the prior art and provides a transformer and inductor matrix type integrated structure, which can integrate a transformer and an inductor in a magnetic core, conveniently control the turn ratio and the inductance ratio of the transformer, optimize the magnetic flux distribution, reduce the loss of the magnetic core, greatly reduce the volume of a magnetic element of a power converter and improve the power density.
The technical scheme is as follows:
in order to achieve the above purpose, the invention adopts the following technical scheme:
the transformer and inductor matrix type integrated structure comprises a magnetic core (10), a primary winding (20) and a secondary winding (30); the magnetic core consists of two magnetic plates, m multiplied by n winding posts and k non-winding posts; wherein m is more than or equal to 2, n is more than or equal to 2, k is more than or equal to 0, and m, n and k are integers.
The two magnetic plates are the same in shape and size, and the magnetic plates are cuboids, cylinders, elliptic cylinders or prisms.
The m multiplied by n winding posts are distributed in a matrix type; the section of each winding post is circular, rectangular, semicircular, crescent or polygonal; the winding posts are the same in size and shape; each winding post is provided with an air gap, and the air gaps are the same in length.
The non-wrapping posts are positioned at the geometric center of each 4 wrapping posts or positioned at the periphery of the integral wrapping post; the section of the material is round, rectangular, semicircular, crescent or polygonal; the non-winding post has no air gap, and the upper end and the lower end of the non-winding post are both contacted with the magnetic plate.
A primary winding is wound on each winding post; the primary windings of every two adjacent winding posts are opposite in winding direction; the primary winding posts on each winding post in each row are connected in series, and the primary windings between each row are connected in series or in parallel.
The secondary windings are divided into n-1 groups, wherein the jth group of secondary windings is wound on the ith row and the ith
The winding posts in the row (i is more than or equal to 1 and less than or equal to m, j is more than or equal to 1 and less than or equal to n-1); or the secondary windings are divided into n-1 groups, wherein the jth group of secondary windings is wound on the ith row and the ith
The winding posts in the row (i is more than or equal to 1 and less than or equal to m, j is more than or equal to 1 and less than or equal to n-1); the secondary windings of each group are connected in series or in parallel.
The primary winding and the secondary winding can adopt a planar winding and a winding.
The essential difference between the technical scheme of the invention and the existing technical scheme is that m multiplied by n winding posts are introduced, the winding directions of primary windings on the adjacent winding posts are opposite, and n-1 groups of m adjacent winding posts with the same magnetic flux direction are wound with integrated secondary windings, so that the remaining m winding posts without winding the secondary windings are used as inductance magnetic posts, and the purpose of integrating a transformer and an inductor is achieved; meanwhile, any turn ratio and any inductance ratio are realized by changing the series-parallel connection mode of m, n and each group of secondary windings.
The invention has the following beneficial effects:
(1) meanwhile, the transformer and the inductor are integrated, so that the volume weight of the power magnetic part can be greatly reduced, the power density of the converter is improved, the multi-path parallel output can be realized, and the multi-module series-parallel power supply is particularly suitable for a multi-module series-parallel power supply with low voltage and large current output;
(2) the magnetic core structure is flexibly configured, and any transformer turn ratio and any inductance ratio can be realized;
(3) the magnetic columns of the matrix type are distributed in the opposite directions of the magnetic fluxes of the adjacent magnetic columns, so that the winding structure and the magnetic flux path are optimized, the mutual offset of the magnetic fluxes is realized, the magnetic core loss is greatly reduced, and the efficiency is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only some embodiments of the invention and are therefore not to be considered limiting of its scope, for those skilled in the art will be able to derive additional related drawings therefrom without the benefit of the inventive faculty.
FIG. 1 is an exploded view of a 2 × 3 matrix integrated transformer and inductor structure;
FIG. 2 is a schematic diagram of a primary winding of a transformer and inductor 2 × 3 matrix integrated structure;
FIG. 3 is a schematic diagram of a secondary winding of a 2 × 3 matrix integrated transformer and inductor structure;
FIG. 4 is an equivalent circuit diagram of a 2 × 3 matrix integrated transformer and inductor structure;
FIG. 5 is a schematic diagram of a conventional LLC resonant converter;
FIG. 6 is an exploded view of a 3 × 7 matrix integrated transformer and inductor structure;
FIG. 7 is a schematic diagram of a primary winding of a 3 × 7 matrix integrated transformer and inductor structure;
FIG. 8 is a schematic diagram of a first layer secondary winding of a 3 × 7 matrix integrated transformer and inductor structure;
FIG. 9 is a schematic diagram of a second layer secondary winding of a 3 × 7 matrix integrated transformer and inductor structure;
fig. 10 is an equivalent circuit diagram of a 3 × 7 matrix integrated transformer and inductor structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; in the figure, the symbol "x" indicates that the magnetic flux direction is from outside to inside, the symbol "·" indicates that the magnetic flux direction is from inside to outside, and the symbol "·" indicates the end of the same name.
A first embodiment of the present invention provides a 2 × 3 matrix integrated structure of a transformer and an inductor, and fig. 1 to 3 illustrate an explosion diagram, a schematic diagram of a primary winding and a schematic diagram of a secondary winding of the 2 × 3 matrix integrated structure of the transformer and the inductor according to the first embodiment of the present invention;
the transformer and inductor 2 x 3 matrix integrated structure comprises: a magnetic core 10, a primary winding 20, and a secondary winding 30; the magnetic core 10 is composed of an upper magnetic plate 101, a winding post 102 and a lower magnetic plate 103; the winding posts 102 comprise 6 magnetic posts which are distributed in a 2 x 3 matrix form, the 6 magnetic posts have the same cross section area, and the air gaps are the same;
the primary winding 20 is wound on 6 magnetic columns of the winding column 102, the number of turns of the primary winding on each magnetic column is Np, and the winding directions of adjacent magnetic columns are opposite; secondary winding 30 includes a first set of secondary windings 301 and a second set of secondary windings 302; the first group of secondary windings 301 are wound on the magnetic columns of the 1 st row and the 2 nd column and the magnetic columns of the 2 nd row and the 1 st column, the second group of secondary windings 302 are wound on the magnetic columns of the 1 st row and the 3 rd column and the magnetic columns of the 2 nd row and the 2 nd column, the number of turns of the secondary windings on each magnetic column is Ns, and the winding directions of the first group of secondary windings 301 and the second group of secondary windings 302 are opposite; the first group of secondary windings 301 and the second group of secondary windings 302 are connected in parallel to form two secondary side parallel outputs, and fig. 4 is an equivalent circuit diagram of a 2 × 3 matrix type integrated structure of a transformer and an inductor; the turn ratio of the transformer is Np: Ns, the inductance ratio is the ratio of the number of the magnetic columns wound with the secondary winding to the number of the magnetic columns not wound with the secondary winding, namely 4: 2, and the expressions of the excitation inductance and the inductance of the primary winding are respectively as follows:
in the formula, muoIs air permeability, AeIs the cross-sectional area of each magnetic pillar, and l is the air gap length of each magnetic pillar.
Fig. 5 is a schematic diagram of a conventional LLC resonant converter, where a primary side adopts an asymmetric half-bridge structure, and a secondary side adopts a two-way parallel full-wave synchronous rectification structure, including two transformers and an inductor, and in order to reduce size and improve efficiency, a second embodiment of the present invention provides a 3 × 7 matrix integrated structure of transformers and inductors, and fig. 6 to 9 show an explosion diagram, a schematic diagram of a primary winding, a schematic diagram of a first layer of secondary windings, and a schematic diagram of a second layer of secondary windings of the 3 × 7 matrix integrated structure of transformers and inductors provided by the second embodiment of the present invention;
the 3 x 7 matrix integrated transformer and inductor structure comprises: a magnetic core 40, a primary winding 50, and a secondary winding 60; the magnetic core 40 is composed of an upper magnetic plate 401, a winding post 402 and a lower magnetic plate 403; the winding posts 402 comprise 21 magnetic posts which are distributed in a 3 x 7 matrix form, the cross sections of the 21 magnetic posts are the same, and the air gaps are the same;
the primary winding 50 is wound on 21 magnetic columns of the winding column 402, the number of turns of the primary winding on each magnetic column is 3.5, and the winding directions of adjacent magnetic columns are opposite;
the first group of secondary windings 601a in the first layer is wound on the 2 nd column and magnetic column in the 1 st row, the 1 st column and magnetic column in the 2 nd row, and the 2 nd column in the 3 rd row, the second group of secondary windings 601b is wound on the 3 rd column and magnetic column in the 1 st row, the 2 nd column and magnetic column in the 3 rd row, the 3 rd column, the third group of secondary windings 601c is wound on the 4 th column and magnetic column in the 1 st row, the 3 rd column and magnetic column in the 3 rd row, and the 4 th column in the 3 rd row, and the fourth group of secondary windings 601d is wound on the 5 th column and magnetic column in the 1 st row, the magnetic pillar of the 4 th column in the 2 nd row and the magnetic pillar of the 5 th column in the 3 rd row, the fifth group of secondary windings 601e are wound on the 6 th column and the magnetic pillar in the 1 st row, the magnetic pillar of the 5 th column in the 2 nd row and the magnetic pillar in the 6 th column in the 3 rd row, and the sixth group of secondary windings 601f are wound on the 7 th column and the magnetic pillar in the 1 st row, the magnetic pillar in the 6 th column in the 2 nd row and the magnetic pillar in the 7 th column in the 3 rd row;
a first set of secondary windings 602a in the second layer is wound on the 1 st row, 1 st column and magnetic pillar, the 2 nd row, 2 nd column and the 3 rd row, 1 st column, a second set of secondary windings 602b is wound on the 1 st row, 2 nd column and magnetic pillar, the 2 nd row, 3 rd column and the 3 rd row, 2 nd column, a third set of secondary windings 602c is wound on the 1 st row, 3 rd column and magnetic pillar, the 2 nd row, 4 th column and the 3 rd row, 3 rd column, a fourth set of secondary windings 602d is wound on the 1 st row, 4 th column and magnetic pillar, the magnetic pillar of the 5 th column in the 2 nd row and the magnetic pillar of the 4 th column in the 3 rd row, the fifth group of secondary windings 602e are wound on the 5 th column and the magnetic pillar in the 1 st row, the magnetic pillar of the 6 th column in the 2 nd row and the magnetic pillar of the 5 th column in the 3 rd row, and the sixth group of secondary windings 602f are wound on the 6 th column and the magnetic pillar in the 1 st row, the magnetic pillar in the 7 th column in the 2 nd row and the magnetic pillar in the 6 th column in the 3 rd row;
the number of turns of the first layer of secondary winding and the second layer of secondary winding on each magnetic pole is 2; in each layer of secondary windings, the winding directions of adjacent groups of secondary windings are opposite; in the first layer of secondary windings 601, a first group of secondary windings 601a, a second group of secondary windings 601b and a third group of secondary windings 601c are connected in series, and a fourth group of secondary windings 601d, a fifth group of secondary windings 601e and a sixth group of secondary windings 601f are connected in series; in the second layer of secondary windings 602, the first group of secondary windings 602a, the second group of secondary windings 602b, and the third group of secondary windings 602c are connected in series, and the fourth group of secondary windings 602d, the fifth group of secondary windings 602e, and the sixth group of secondary windings 602f are connected in series; in each layer of secondary windings, the front three groups of secondary windings are connected in parallel with the rear three groups of secondary windings, the first layer of secondary windings 601 is connected in parallel with the second layer of secondary windings 602 to form 4 paths of secondary side parallel output, and fig. 10 is an equivalent circuit diagram of a 3 × 7 matrix type integrated structure of a transformer and an inductor; the turn ratio of the transformer T1 to the transformer T2 is 7: 4, and the inductance ratio (Lmp1+ Lmp2)/L is the ratio of the number of magnetic columns wound with the secondary winding to the number of magnetic columns not wound with the secondary winding, namely 6: 1; the expressions of the primary winding excitation inductance and the inductance are respectively as follows:
in the formula, muoIs air permeability, Ae1Is the cross-sectional area of each magnetic column,/1The air gap length of each magnetic pole.
Having thus described the preferred embodiments of the present invention, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts, and it is therefore intended that the appended claims be interpreted as including the preferred embodiments and all variations and modifications that fall within the scope of the present invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The utility model provides a transformer and inductance matrix integrated structure which characterized in that: the transformer and inductor matrix type integrated structure comprises a magnetic core, a primary winding and a secondary winding; the magnetic core consists of two magnetic plates, m multiplied by n winding posts and non-winding posts; the letter m is more than or equal to 2, n is more than or equal to 2, and m and n are integers.
2. The magnetic plate of claim 1, wherein: the two magnetic plates have the same shape and size, and the shape of the magnetic plates can be cuboid, cylinder, elliptic cylinder, prism and the like.
3. The wrapping post according to claim 1, characterized in that: the m multiplied by n winding posts are distributed in a matrix type; the section of each winding post can be circular, rectangular, semicircular, crescent, polygonal and the like; the sectional areas of the winding posts are equal; each winding post is provided with an air gap, and the length of the air gap of each winding post is the same.
4. The non-wrapping post as recited in claim 1, wherein: the non-wrapping posts can be positioned at the geometric center of every 4 wrapping posts and can also be positioned at the periphery of the integral wrapping post; the section of the device can be round, rectangular, semicircular, crescent, polygonal and the like; the sectional areas of the non-winding posts can be equal or unequal; the non-winding post has no air gap, and the upper end and the lower end of the non-winding post are both contacted with the magnetic plate; the number of the non-winding posts can be 1, a plurality of non-winding posts can be provided, or none of the non-winding posts can be provided.
5. The primary winding post of claim 1, wherein: a primary winding is wound on each winding post; the primary windings of every two adjacent winding posts are opposite in winding direction; the primary winding posts on each winding post in each row are connected in series, and the primary windings between each row can be connected in series or in parallel.
6. The secondary winding of claim 1, wherein the secondary winding is characterized by: the secondary windings may be divided into n-1 groups, with the jth group of secondary windings being wound in the ith row, the ith
The winding posts in the row (i is more than or equal to 1 and less than or equal to m, j is more than or equal to 1 and less than or equal to n-1); the secondary windings can also be divided into n-1 groups, wherein the jth group of secondary windings is wound on the ith row and the ith
The winding posts in the row (i is more than or equal to 1 and less than or equal to m, j is more than or equal to 1 and less than or equal to n-1); each group of secondary windings can be connected in series or in parallel; in a certain period of time when the transformer and the magnetic induction integrated structure work, at least m winding columns with non-wound secondary windings or secondary windings with current of 0 exist.
7. A transformer and inductor magnetic integration structure as claimed in claim 1, wherein: the primary winding and the secondary winding can adopt a planar winding and a winding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011543020.5A CN112652438A (en) | 2020-12-23 | 2020-12-23 | Transformer and inductance matrix integrated structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011543020.5A CN112652438A (en) | 2020-12-23 | 2020-12-23 | Transformer and inductance matrix integrated structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113314312A (en) * | 2021-04-16 | 2021-08-27 | 西安交通大学 | Integrated planar inductor based on magnetic core structure |
| CN114156041A (en) * | 2021-12-07 | 2022-03-08 | 捷蒽迪电子科技(上海)有限公司 | Magnetic core structure and magnetic element |
| CN116247958A (en) * | 2023-05-10 | 2023-06-09 | 东南大学 | Multi-port magnetic network energy router, control method and equipment |
| EP4310871A4 (en) * | 2021-04-14 | 2024-04-17 | Huawei Digital Power Tech Co Ltd | Planar transformer and related device |
-
2020
- 2020-12-23 CN CN202011543020.5A patent/CN112652438A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4310871A4 (en) * | 2021-04-14 | 2024-04-17 | Huawei Digital Power Tech Co Ltd | Planar transformer and related device |
| CN113314312A (en) * | 2021-04-16 | 2021-08-27 | 西安交通大学 | Integrated planar inductor based on magnetic core structure |
| CN114156041A (en) * | 2021-12-07 | 2022-03-08 | 捷蒽迪电子科技(上海)有限公司 | Magnetic core structure and magnetic element |
| CN114156041B (en) * | 2021-12-07 | 2024-01-12 | 捷蒽迪电子科技(上海)有限公司 | Magnetic core structure and magnetic element |
| CN116247958A (en) * | 2023-05-10 | 2023-06-09 | 东南大学 | Multi-port magnetic network energy router, control method and equipment |
| CN116247958B (en) * | 2023-05-10 | 2023-09-19 | 东南大学 | Multi-port magnetic network energy router, control method and equipment |
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