CN111799077A - Transformer, manufacturing method of transformer and electromagnetic device - Google Patents
Transformer, manufacturing method of transformer and electromagnetic device Download PDFInfo
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- CN111799077A CN111799077A CN201910282271.3A CN201910282271A CN111799077A CN 111799077 A CN111799077 A CN 111799077A CN 201910282271 A CN201910282271 A CN 201910282271A CN 111799077 A CN111799077 A CN 111799077A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/16—Toroidal transformers
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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
- H01F27/24—Magnetic cores
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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
- H01F27/2804—Printed windings
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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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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Abstract
The invention discloses a transformer, a manufacturing method of the transformer and an electromagnetic device, wherein the transformer comprises: an annular magnetic core, an inner region provided with an inner conductive member, and an outer region provided with an outer conductive member; the first side of the annular magnetic core is provided with a first conducting layer and a second conducting layer in a laminated mode, the second side opposite to the first side is provided with a third conducting layer and a fourth conducting layer in a laminated mode, and the first conducting layer, the second conducting layer and the fourth conducting layer comprise a plurality of conducting wire patterns; the inner and outer conductive members are sequentially connected to the conductive patterns on the first and third conductive layers and the conductive patterns on the second and fourth conductive layers to form a coil loop surrounding the annular magnetic core. Through the mode, the coupling effect is improved, and the performance of the transformer is improved.
Description
Technical Field
The invention relates to the technical field of integrated circuits, in particular to a transformer, a manufacturing method of the transformer and an electromagnetic device.
Background
The transformer consists of a magnetic core and a coil, wherein the coil is provided with two or more than two windings, the winding connected with a power supply is called an input coil, and the other windings are called coupling coils. It can transform alternating voltage, current and impedance.
At present, along with the miniaturization development of the transformer, the arrangement of the transformer coils is compact, so that stray capacitance exists between the input coil and the coupling coil, the common-mode noise is increased, meanwhile, the effective coupling length of the input coil and the coupling coil is small due to the miniaturization of the transformer, the coupling effect is poor frequently, and the performance of the transformer is reduced.
Disclosure of Invention
The invention mainly solves the technical problem of providing a transformer, a manufacturing method of the transformer and an electromagnetic device so as to improve the coupling effect and the performance of the transformer.
In order to solve the technical problems, the invention adopts a technical scheme that:
provided is a transformer including:
an annular magnetic core, an inner region of the annular magnetic core being provided with an inner conductive member; an external conductive part is arranged in the external area of the annular magnetic core;
a first conducting layer and a second conducting layer which are insulated from each other are stacked on a first side of the annular magnetic core, a third conducting layer and a fourth conducting layer which are insulated from each other are stacked on a second side of the annular magnetic core, wherein the second side of the annular magnetic core is opposite to the first side, and the first conducting layer, the second conducting layer and the fourth conducting layer respectively comprise a plurality of conducting wire patterns which are arranged at intervals along the circumferential direction of the annular magnetic core;
the inner conductive member and the outer conductive member are used for sequentially connecting the wire patterns on the first conductive layer and the third conductive layer and sequentially connecting the wire patterns on the second conductive layer and the fourth conductive layer to respectively form a coil loop surrounding the annular magnetic core; or
The inner conductive member and the outer conductive member are used to sequentially connect the conductive wire patterns on the first conductive layer and the fourth conductive layer, and to sequentially connect the conductive wire patterns on the second conductive layer and the third conductive layer, to form coil loops around the annular magnetic core, respectively.
In order to solve the technical problem, the invention adopts another technical scheme that:
provided is a method for manufacturing a transformer, the method including:
arranging an annular magnetic core;
arranging an inner conductive member in an inner region of the annular magnetic core; arranging an external conductive member in an external region of the annular magnetic core;
a first conducting layer and a second conducting layer which are insulated from each other are stacked on a first side of the annular magnetic core, a third conducting layer and a fourth conducting layer which are insulated from each other are stacked on a second side of the annular magnetic core, wherein the second side is opposite to the first side, and the first conducting layer, the second conducting layer and the fourth conducting layer are arranged in a stacked mode;
sequentially connecting the wire patterns on the first and third conductive layers and the wire patterns on the second and fourth conductive layers through the inner and outer conductive members to form coil loops around the annular magnetic core, respectively; or
Sequentially connecting the wire patterns on the first and fourth conductive layers and sequentially connecting the wire patterns on the second and third conductive layers through the inner and outer conductive members to form coil loops around the annular magnetic core, respectively.
In order to solve the technical problem, the invention adopts another technical scheme that:
an electromagnetic device is provided comprising at least one transformer as described above.
The invention has the beneficial effects that: different from the prior art, the first and second conductive layers which are insulated from each other are stacked on the first side of the annular magnetic core of the transformer, the third and fourth conductive layers which are insulated from each other are stacked on the second side opposite to the first side, and the first to fourth conductive layers respectively comprise a plurality of conductor patterns which are arranged at intervals along the circumferential direction of the annular magnetic core; sequentially connecting the wire patterns on the first and third conductive layers and the wire patterns on the second and fourth conductive layers through the inner and outer conductive members to form coil loops around the annular magnetic core, respectively; or the inner and outer conductive pieces are sequentially connected with the wire patterns on the first and fourth conductive layers and the wire patterns on the second and third conductive layers to form coil loops respectively surrounding the annular magnetic core, and the input wires and the coupling wires of the transformer are arranged in layers in the above manner, so that the number of the input wires and the coupling wires is increased, the effective coupling length of the input coil and the coupling coil is increased, the coupling effect is improved, and the performance of the transformer is improved.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a transformer according to the present invention;
FIG. 2 is a schematic cross-sectional view of a first embodiment of the transformer of the present invention;
FIG. 3 is a top view of a first embodiment of the transformer of the present invention;
FIG. 4 is a bottom view of the first embodiment of the transformer of the present invention;
FIG. 5 is a schematic structural diagram of a substrate in the transformer of the present invention;
FIG. 6 is a schematic structural diagram of a second embodiment of the transformer of the present invention;
FIG. 7 is a top view of a second embodiment of the transformer of the present invention;
FIG. 8 is a bottom view of a second embodiment of the transformer of the present invention;
FIG. 9 is a schematic flow chart of a method of manufacturing a transformer according to the present invention;
fig. 10 is a schematic view of the structure of an electromagnetic device of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of a transformer according to a first embodiment of the present invention. The transformer 100 includes:
a ring core 10, an inner region 11 of the ring core 10 being provided with an inner conductive member 111; the outer region 12 of the ring core 10 is provided with an outer conductive member 121.
In this embodiment, the annular magnetic core 10 may be formed by stacking a plurality of annular sheets in sequence, or by winding a long and narrow metal material, or by sintering a plurality of metal mixtures. The annular magnetic core 10 may be formed in various manners, and may be flexibly selected according to different materials, which is not limited in the present application.
The ring core 10 may be an iron core, or may be composed of various magnetic metal tea oxides, such as manganese-zinc ferrite, nickel-zinc ferrite, and the like.
With reference to fig. 2, specifically, fig. 2 is a schematic cross-sectional view along CC' of a first embodiment (fig. 1) of the transformer, a first conductive layer 21 and a second conductive layer 22 that are insulated from each other are stacked on a first side a of the annular magnetic core 10, a third conductive layer 23 and a fourth conductive layer 24 that are insulated from each other are stacked on a second side B of the annular magnetic core 10 opposite to the first side a, and each of the first to fourth conductive layers 21 to 24 includes a plurality of conductive wire patterns that are arranged at intervals along a circumferential direction of the annular magnetic core 10.
In this embodiment, the first conductive layer 21, the second conductive layer 22, the third conductive layer 23, and the fourth conductive layer 24 may be made of a metal material. The metal material used to form the first conductive layer 21, the second conductive layer 22, the third conductive layer 23, and the fourth conductive layer 24 includes, but is not limited to, copper, aluminum, iron, nickel, gold, silver, platinum group, chromium, magnesium, tungsten, molybdenum, lead, tin, indium, zinc, or any alloy thereof.
In this embodiment, the metal materials of the first conductive layer 21, the second conductive layer 22, the third conductive layer 23 and the fourth conductive layer 24 and the materials of the inner conductive member 111 and the outer conductive member 121 may be the same.
In this embodiment, the inner conductor 111 and the outer conductor 121 are used to sequentially connect the wire patterns on the first conductive layer 21 and the third conductive layer 23, and to sequentially connect the wire patterns on the second conductive layer 22 and the fourth conductive layer 24, so as to form coil loops respectively surrounding the annular magnetic core.
Wherein the first conductive layer 21 and the third conductive layer 23 are input line layers, the second conductive layer 22 and the fourth conductive layer 24 are coupling line layers, the conductive patterns on the input line layers are input lines, and the conductive patterns on the coupling line layers are coupling lines.
Wherein, the same input line layer at least comprises one input line, and the same coupling line layer at least comprises one coupling line.
All the conductive wire patterns on each conductive layer are conductive wires, and each conductive wire is connected across between a corresponding one of the inner conductive members 111 and one of the outer conductive members 121, thereby forming an input coil loop and a coupling coil loop capable of transmitting current around the annular magnetic core 10.
With reference to fig. 3, the transformer 100 further includes: a substrate 30, wherein the substrate 30 includes a central portion 31 and a peripheral portion 32 surrounding the central portion 31, the central portion 31 is opened with a plurality of inner via holes 311 penetrating through the substrate 30 for accommodating the inner conductive members 111; the peripheral portion 32 is formed with a plurality of external via holes 321 penetrating through the substrate 30 for accommodating the external conductive elements 121; an annular receiving groove 33 is formed between the central portion 31 and the peripheral portion 32 for receiving the annular magnetic core 10.
In this embodiment, the central portion 31 and the peripheral portion 32 may be a unitary structure, that is, the substrate 30 is divided into the central portion 31 and the peripheral portion 32 by opening the annular accommodating groove 33 at the center of the substrate 10.
In the present embodiment, the cross-sectional shape of the annular receiving groove 33 is substantially the same as the cross-sectional shape of the annular magnetic core 10, so that the annular magnetic core 10 can be received in the annular receiving groove 33. The cross section of the annular accommodating groove 33 may be circular, square, elliptical, or the like. Correspondingly, the shape of the annular magnetic core 10 may be a circular ring, a square ring, an oval, or the like.
As shown in fig. 2, the first conductive layer 21 and the second conductive layer 22 are located on the first side a of the substrate 30 and are perpendicular to and electrically connected to the inner conductive member 111 and the outer conductive member 121, the third conductive layer 23 and the fourth conductive layer 24 are located on the second side B of the substrate 30 and are perpendicular to and electrically connected to the inner conductive member 111 and the outer conductive member 121, and the first conductive layer 21 and the second conductive layer 22 and the third conductive layer 23 and the fourth conductive layer 24 are insulated from each other by providing an insulating layer 40 between the first conductive layer 21 and the second conductive layer 22 and between the third conductive layer 23 and the fourth conductive layer 24.
In this embodiment, the material of the insulating layer 40 may be PI (i.e., polyimide).
The inner vias 311 are uniformly distributed on one side of the central portion 31 close to the annular magnetic core 10 in a single layer or multiple layers, and the outer vias 321 are uniformly distributed on one side of the outer peripheral portion 32 close to the annular magnetic core 10.
The inner conductor 111 and the outer conductor 121 may be metal pillars, and the diameter of the metal pillars is smaller than or equal to the diameter of the corresponding inner via hole 311 or outer via hole 321.
In another embodiment of the present invention, it is different from the above-described embodiments in that the inner conductor 111 and the outer conductor 121 are used to sequentially connect the wire patterns on the first conductive layer 21 and the fourth conductive layer 24, and to sequentially connect the wire patterns on the second conductive layer 22 and the third conductive layer 23, to form coil loops around the annular magnetic core 10, respectively.
By respectively arranging the input line layer and the coupling line layer on the two opposite sides of the substrate 30, the input line and the coupling line which are positioned on the same side of the substrate 30 are respectively arranged on different layers, so that the number of the input lines and the coupling lines is increased, the effective coupling length of the input coil and the coupling coil is increased, the processing path of signals is lengthened, the coupling effect is improved, and the performance of the transformer is improved.
With reference to fig. 4 and 5, the input lines 211 on the first conductive layer 21 of the transformer 100 and the coupling lines 221 on the second conductive layer 22 are alternately arranged at intervals on a plane parallel to the plane of the annular magnetic core 10, and the projections of the input lines and the coupling lines do not overlap; meanwhile, the input lines 231 on the third conductive layer 23 and the coupling lines 241 on the fourth conductive layer 24 of the transformer 100 are alternately arranged at intervals on a plane parallel to the plane of the annular magnetic core 10, and the projections of the input lines and the coupling lines are not overlapped.
Through the mode, on the basis of layering the input lines and the coupling lines, the input lines and the coupling lines are alternately arranged on the plane parallel to the plane of the annular magnetic core 10 at intervals, and projections are not overlapped, so that the input lines and the coupling lines are isolated, further stray capacitance between the input lines and the coupling lines is reduced, and the transformer is favorable for suppressing common mode noise.
Fig. 6 is a schematic structural diagram of a transformer according to a second embodiment of the present invention. With reference to fig. 7 and 8, the difference from the first embodiment is that the input lines 211 on the first conductive layer 21 of the transformer 100 and the coupling lines 221 on the second conductive layer 22 are alternately arranged at intervals on a plane parallel to the plane of the annular magnetic core 10, and the projection portions of the input lines and the coupling lines overlap; meanwhile, the input lines 231 on the third conductive layer 23 of the transformer 100 and the coupling lines 241 on the fourth conductive layer 24 are alternately arranged at intervals on a plane parallel to the plane of the annular magnetic core 10, and the projection portions of the input lines and the coupling lines overlap.
Through the above manner, on the basis of layering the input lines and the coupling lines, the input lines and the coupling lines are alternately arranged at intervals on a plane parallel to the plane of the annular magnetic core 10, and the projections of the input lines and the coupling lines are partially overlapped, so that the coupling between the input lines and the coupling lines is increased, and the coupling and the isolation between the input lines and the coupling lines are balanced by controlling the overlapping area of the input lines and the coupling lines. The larger the overlapping area of the input line and the coupling line is, the better the coupling effect between the input line and the coupling line is, and the coupling is favorable for transmitting differential mode signals; the smaller the overlapping area of the input line and the coupling line is, the better the isolation effect between the input line and the coupling line is, and the isolation is beneficial to inhibiting common mode signals. The overlapping area of the input line and the coupling line is regulated and controlled, so that the transformer has a good coupling effect and a good common-mode signal suppression effect.
Fig. 9 is a schematic flow chart of a transformer manufacturing method according to the present invention. With reference to fig. 1 to 8, the method includes:
step S1: an annular magnetic core is provided.
Providing a substrate 30, wherein the substrate 30 comprises a central part 31 and a peripheral part 32 surrounding the central part 31, and a plurality of inner through holes 311 penetrating through the substrate 30 are arranged in the central part 31; a plurality of external via holes 321 penetrating the substrate 30 are opened in the peripheral portion 32; an annular accommodation groove 33 is formed between the central portion 31 and the outer peripheral portion 32, and accommodates the annular magnetic core 10.
Specifically, the substrate 30 is provided with the annular receiving groove 33, and the annular receiving groove 33 divides the substrate 30 into a central portion 31 surrounded by the annular receiving groove 33 and an outer peripheral portion 32 surrounding the central portion 31 and disposed around the annular receiving groove 33.
Step S2: arranging an inner conductive member in an inner region of the annular magnetic core; an outer conductive member is disposed in an outer region of the annular core.
The plurality of inner conductive vias 311 of the central portion 31 of the substrate 30 are configured to receive the inner conductive elements 111, and the plurality of outer conductive vias 321 of the peripheral portion 32 of the substrate 30 are configured to receive the outer conductive elements 121.
The inner through holes 311 are uniformly distributed in a single layer or multiple layers on the side of the central portion 31 close to the annular receiving groove 33, and the outer through holes 321 are uniformly distributed on the side of the outer peripheral portion 32 close to the annular receiving groove 33.
Step S3: the first conducting layer and the second conducting layer which are insulated from each other are stacked on the first side of the annular magnetic core, the third conducting layer and the fourth conducting layer which are insulated from each other are stacked on the second side, opposite to the first side, of the annular magnetic core, and the first conducting layer, the second conducting layer and the fourth conducting layer respectively comprise a plurality of conducting wire patterns which are arranged at intervals along the circumferential direction of the annular magnetic core.
The first conductive layer 21 and the second conductive layer 22 are located on the first side a of the substrate 30 and are perpendicular to and electrically connected to the inner conductive member 111 and the outer conductive member 121, the third conductive layer 23 and the fourth conductive layer 24 are located on the second side B of the substrate 30 and are perpendicular to and electrically connected to the inner conductive member 111 and the outer conductive member 121, and an insulating layer 40 is disposed between the first conductive layer 21 and the second conductive layer 22 and between the third conductive layer 23 and the fourth conductive layer 24 to isolate the first conductive layer 21 and the second conductive layer 22 from the third conductive layer 23 and the fourth conductive layer 24.
Step S4: sequentially connecting the wire patterns on the first and third conductive layers and the wire patterns on the second and fourth conductive layers through the inner and outer conductive members to form coil loops around the annular magnetic core, respectively; or
Sequentially connecting the wire patterns on the first and fourth conductive layers and sequentially connecting the wire patterns on the second and third conductive layers through the inner and outer conductive members to form coil loops around the annular magnetic core, respectively.
A specific method for forming the inner conductor 111 and the outer conductor 121 may be as follows: a metal layer is formed on inner walls of the inner and outer via holes 311 and 321 by, for example, plating, coating, etc., and the inner conductor 111 and the outer conductor 121 are formed from the metal layer, thereby electrically connecting the first conductive layer 21 and the third conductive layer 23 located at opposite sides of the substrate 30, and electrically connecting the second conductive layer 22 and the fourth conductive layer 24 located at opposite sides of the substrate 30.
Wherein the first conductive layer 21 and the third conductive layer 23 are input line layers, the second conductive layer 22 and the fourth conductive layer 24 are coupling line layers, the conductive patterns on the input line layers are input lines, and the conductive patterns on the coupling line layers are coupling lines.
Wherein, the same input line layer at least comprises one input line, and the same coupling line layer at least comprises one coupling line.
All the conductive wire patterns on each conductive layer are conductive wires, and each conductive wire is connected across between a corresponding one of the inner conductive members 111 and one of the outer conductive members 121, thereby forming an input coil loop and a coupling coil loop capable of transmitting current around the annular magnetic core 10.
The specific method for disposing the conductive wire pattern on each of the conductive layers 21-24 may be: and exposing and developing the conductive layer to obtain the protective film on the surface of the conductive layer. The protective film is then removed except where the conductive pattern is located. And then contacting the conductive layer with an etching solution, so that the etching solution dissolves the conductive layer which is not covered by the protective film and is in contact with the conductive layer. After the etching is completed, the substrate 30 is cleaned, the etching solution on the surface is removed, and then the protective film is removed, so that the conductive wire pattern is obtained.
By the method for arranging the input lines and the coupling lines in a layered mode, the arrangement areas of the input lines and the coupling lines can be increased, so that the line widths of the input lines and the coupling lines can be improved, the overcurrent capacity of the whole transformer can be improved, and the performance of the transformer can be improved.
And controlling the formation of the conductive pattern so that the input lines and the coupling lines are alternately arranged at intervals on a plane parallel to the plane of the annular magnetic core, and the projections of the input lines and the coupling lines are not overlapped or partially overlapped.
When the input lines and the coupling lines are alternately arranged at intervals on a plane parallel to the plane of the annular magnetic core and the projections are not overlapped, the input lines and the coupling lines are isolated, so that the stray capacitance between the input lines and the coupling lines is reduced, and the transformer is favorable for suppressing common mode noise.
When the input lines and the coupling lines are alternately arranged at intervals on a plane parallel to the plane of the annular magnetic core and the projection parts of the input lines and the coupling lines are overlapped, the coupling between the input lines and the coupling lines is increased, and the coupling and the isolation between the input lines and the coupling lines are balanced by controlling the overlapped area of the input lines and the coupling lines.
Fig. 10 is a schematic structural diagram of an electromagnetic device according to the present invention. The electromagnetic device 200 comprises the transformer 100 of any of the embodiments described above.
The invention arranges the first and the second conducting layers and the third and the fourth conducting layers on the two sides of the transformer substrate respectively, the first, second, third and fourth conductive layers include a plurality of conductive lines, and if the conductive lines of the first and third conductive layers are input lines, the conductive lines of the two and four conductive layers are coupling lines, the input lines and the coupling lines on each of two sides of the transformer substrate are arranged in layers, and electrically connecting the inner connecting member at the central portion of the substrate and the outer connecting member at the peripheral portion, each of the conductive wires being bridged between a corresponding one of the inner conductive members and one of the outer conductive members to form an input coil loop and a coupling coil loop capable of transmitting current around the transformer annular core, the coupling and isolation between the input line and the coupling line are balanced by reasonably arranging the overlapping area of the input line and the coupling line, so that the performance of the transformer is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A transformer, comprising:
an annular magnetic core, an inner region of the annular magnetic core being provided with an inner conductive member; an external conductive part is arranged in the external area of the annular magnetic core;
a first conducting layer and a second conducting layer which are insulated from each other are stacked on a first side of the annular magnetic core, a third conducting layer and a fourth conducting layer which are insulated from each other are stacked on a second side of the annular magnetic core, wherein the second side of the annular magnetic core is opposite to the first side, and the first conducting layer, the second conducting layer and the fourth conducting layer respectively comprise a plurality of conducting wire patterns which are arranged at intervals along the circumferential direction of the annular magnetic core;
the inner conductive member and the outer conductive member are used for sequentially connecting the wire patterns on the first conductive layer and the third conductive layer and sequentially connecting the wire patterns on the second conductive layer and the fourth conductive layer to respectively form a coil loop surrounding the annular magnetic core; or
The inner conductive member and the outer conductive member are used to sequentially connect the conductive wire patterns on the first conductive layer and the fourth conductive layer, and to sequentially connect the conductive wire patterns on the second conductive layer and the third conductive layer, to form coil loops around the annular magnetic core, respectively.
2. The transformer of claim 1, wherein the first conductive layer and the third conductive layer are input line layers and the second conductive layer and the fourth conductive layer are coupling line layers, or the first conductive layer and the fourth conductive layer are input line layers and the second conductive layer and the third conductive layer are coupling line layers, the conductive patterns on the input line layers are input lines and the conductive patterns on the coupling line layers are coupling lines.
3. The transformer of claim 2, wherein the input lines and the coupling lines are alternately arranged at intervals on a plane parallel to the plane of the annular magnetic core, and the projections of the input lines and the coupling lines are not overlapped or partially overlapped.
4. The transformer of claim 1, further comprising:
the substrate comprises a central part and a peripheral part surrounding the central part, and the central part is provided with a plurality of internal conducting holes penetrating through the substrate and used for accommodating the internal conducting pieces; the peripheral part is provided with a plurality of external conducting holes penetrating through the substrate and used for accommodating the external conducting pieces; an annular accommodating groove is formed between the central part and the peripheral part and is used for accommodating the annular magnetic core;
the first conducting layer and the second conducting layer are located on the first side of the substrate and are perpendicular to and electrically connected with the internal conducting piece and the external conducting piece, the third conducting layer and the fourth conducting layer are located on the second side of the substrate and are perpendicular to and electrically connected with the internal conducting piece and the external conducting piece, and the first conducting layer and the second conducting layer are isolated from the third conducting layer and the fourth conducting layer through insulating layers.
5. The transformer of claim 4, wherein the inner vias are uniformly distributed in a single layer or multiple layers on a side of the central portion adjacent to the annular core, and the outer vias are uniformly distributed on a side of the outer portion adjacent to the annular core.
6. A method for manufacturing a transformer, comprising:
arranging an annular magnetic core;
arranging an inner conductive member in an inner region of the annular magnetic core; arranging an external conductive member in an external region of the annular magnetic core;
a first conducting layer and a second conducting layer which are insulated from each other are stacked on a first side of the annular magnetic core, a third conducting layer and a fourth conducting layer which are insulated from each other are stacked on a second side of the annular magnetic core, wherein the second side is opposite to the first side, and the first conducting layer, the second conducting layer and the fourth conducting layer are arranged in a stacked mode;
sequentially connecting the wire patterns on the first and third conductive layers and the wire patterns on the second and fourth conductive layers through the inner and outer conductive members to form coil loops around the annular magnetic core, respectively; or
Sequentially connecting the wire patterns on the first and fourth conductive layers and sequentially connecting the wire patterns on the second and third conductive layers through the inner and outer conductive members to form coil loops around the annular magnetic core, respectively.
7. The method of claim 6, wherein the first conductive layer and the third conductive layer are input line layers, the second conductive layer and the fourth conductive layer are coupling line layers, or the first conductive layer and the fourth conductive layer are input line layers, the second conductive layer and the third conductive layer are coupling line layers, the conductive pattern on the input line layer is an input line, and the conductive pattern on the coupling line layer is a coupling line.
8. The method of claim 6, wherein the input lines and the coupling lines are alternately arranged at intervals on a plane parallel to a plane of the annular magnetic core, and the projections of the input lines and the coupling lines are not overlapped or partially overlapped.
9. The method of making a transformer of claim 6, further comprising:
arranging a substrate, wherein the substrate comprises a central part and a peripheral part surrounding the central part, and the central part is provided with a plurality of internal conducting holes penetrating through the substrate and accommodating the internal conducting pieces; a plurality of external conducting holes penetrating through the substrate are formed in the peripheral part and used for accommodating the external conducting pieces; an annular accommodating groove is formed between the central part and the peripheral part and used for accommodating the annular magnetic core;
the first conducting layer and the second conducting layer are located on the first side of the substrate and are perpendicular to and electrically connected with the internal conducting piece and the external conducting piece, the third conducting layer and the fourth conducting layer are located on the second side of the substrate and are perpendicular to and electrically connected with the internal conducting piece and the external conducting piece, and the first conducting layer and the second conducting layer are isolated from the third conducting layer and the fourth conducting layer through insulating layers.
10. An electromagnetic device, characterized in that it comprises at least one transformer according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910282271.3A CN111799077A (en) | 2019-04-09 | 2019-04-09 | Transformer, manufacturing method of transformer and electromagnetic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910282271.3A CN111799077A (en) | 2019-04-09 | 2019-04-09 | Transformer, manufacturing method of transformer and electromagnetic device |
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|---|---|---|---|---|
| US7375611B1 (en) * | 2007-04-19 | 2008-05-20 | Harris Corporation | Embedded step-up toroidal transformer |
| CN206602019U (en) * | 2017-04-18 | 2017-10-31 | 江西省高新超越精密电子有限公司 | A kind of new ring-shaped transformer combining structure |
| CN208570296U (en) * | 2018-04-29 | 2019-03-01 | 深南电路股份有限公司 | Transformer and electromagnetic device |
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2019
- 2019-04-09 CN CN201910282271.3A patent/CN111799077A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7375611B1 (en) * | 2007-04-19 | 2008-05-20 | Harris Corporation | Embedded step-up toroidal transformer |
| CN206602019U (en) * | 2017-04-18 | 2017-10-31 | 江西省高新超越精密电子有限公司 | A kind of new ring-shaped transformer combining structure |
| CN208570296U (en) * | 2018-04-29 | 2019-03-01 | 深南电路股份有限公司 | Transformer and electromagnetic device |
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Application publication date: 20201020 |