Inductor wiring structure and magnetic element
By designing different winding spaces and number of windings between the center post and the side post in the inductor routing structure, the problems of inductor winding loss and core flux imbalance are solved, achieving the effects of reduced loss and smaller size.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-10
AI Technical Summary
Existing technologies are difficult to effectively reduce inductor winding losses and avoid core flux imbalance, while also resulting in a large overall size.
An inductor trace structure is adopted, in which the inductor traces surround the central post in different spaces between the central post and the two side posts, ensuring that the number of windings is evenly distributed in different spaces. By the difference in the number of windings on the upper and lower side walls of the central post, a uniform magnetic flux distribution in the magnetic core is formed and the copper wire loss is reduced.
This approach reduces inductor winding losses and achieves a uniform distribution of magnetic flux in the iron core, effectively reducing the overall size and improving the space utilization of inductor devices.
Smart Images
Figure CN224110104U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an inductance winding, and especially relates to an inductance winding structure and a magnetic element. BACKGROUND
[0002] With the rapid development of information industry, the server power supply has played an indispensable role, and the circuit architecture is LLC resonant converter, buck converter (also called buck converter), series capacitor buck converter (SCB) and the like.
[0003] For example, the resonant converter usually includes resonant inductance and transformer and the like magnetic elements, and these magnetic elements are usually composed of a coil and a core. How to effectively reduce the inductance winding loss and avoid the core magnetic flux imbalance, and effectively reduce the overall volume, is one of the subjects that the person skilled in the art desires to study. UTILITY MODEL CONTENTS
[0004] The utility model provides an inductance winding structure, effectively reduces the inductance winding loss and avoids the core magnetic flux imbalance, and effectively reduces the overall volume.
[0005] The inductance winding structure of the utility model, including an inductance winding and a core piece, the inductance winding has an input end and an output end, and includes a first winding connected with the input end and a second winding connected with the output end. The core piece is magnetically coupled to the inductance winding, and the core piece includes a base, a middle column and two side columns protruding from the base, the middle column and the two side columns have a first space and a second space between them, the first winding passes through the first space at least to surround the middle column, and the second winding passes through the second space to surround the middle column, wherein the number of times of passing through the first space by the inductance winding is equal to the number of times of passing through the second space by the inductance winding.
[0006] The inductance winding structure of the utility model, including an inductance winding, a core piece and a circuit board. The inductance winding has an input end and an output end, and includes a first winding connected with the input end and a second winding connected with the output end. The core piece is magnetically coupled to the inductance winding, and the core piece includes a base, a middle column and two side columns protruding from the base, the middle column and the two side columns have a first space and a second space between them, the first winding passes through the first space at least to surround the middle column, and the second winding passes through the second space to surround the middle column, wherein the number of times of passing through the first space by the inductance winding is equal to the number of times of passing through the second space by the inductance winding. The inductance winding is formed on the circuit board, and the middle column passes through the through hole of the circuit board.
[0007] The utility model discloses a magnetic component, including a wiring and a iron core spare. Wiring has a first wiring and a second wiring. The iron core spare includes a base, a upper cover, a middle column, a first side column and a second side column, and the middle column, the first side column and the second side column are arranged between the base and the upper cover, and the middle column is located between the first side column and the second side column. The first wiring passes through the middle column and the first side column, and the second wiring passes through the middle column and the second side column, and the first wiring and the second wiring do not contact each other.
[0008] In an embodiment of the utility model, the middle column cross section area is bigger than each side column cross section area.
[0009] In an embodiment of the utility model, the first wiring has a first end away from the input end, and the second wiring has a second end away from the output end, and the input end and the output end are located on one side of the iron core spare, and the first end and the second end are located on the other side of the iron core spare.
[0010] In an embodiment of the utility model, the middle column includes a upper side wall and a lower side wall which are symmetrically divided with the middle column center, the upper side wall corresponds to the first space, the lower side wall corresponds to the second space, the input end and the first end have a first winding section, the first winding section winds the upper side wall of the middle column, the output end and the second end have a second winding section, and the second winding section winds the lower side wall of the middle column.
[0011] In an embodiment of the utility model, the middle column includes a upper side wall and a lower side wall which are symmetrically divided with the middle column center, the upper side wall corresponds to the first space, the lower side wall corresponds to the second space, the input end and the first end have a first winding section, the first winding section winds the upper side wall and the lower side wall of the middle column, the first winding section passes through the upper side wall N times, the first winding section passes through the lower side wall N-1 times, the output end and the second end have a second winding section, and the second winding section winds the lower side wall of the middle column, and the second winding section passes through the lower side wall 1 time.
[0012] In an embodiment of the utility model, the first end and the second end are used to connect a transformer.
[0013] In an embodiment of the utility model, the two side columns are arranged in a first direction, and the extension direction of the primary side coil of the transformer and the extension direction of the secondary side coil of the transformer are parallel to the first direction.
[0014] In an embodiment of the utility model, the circuit board is a single layer board, the middle column includes a upper side wall and a lower side wall which are symmetrically divided with the middle column center, the upper side wall corresponds to the first space, the lower side wall corresponds to the second space, the input end and the first end have a first winding section, the first winding section winds the upper side wall of the middle column, the output end and the second end have a second winding section, and the second winding section winds the lower side wall of the middle column.
[0015] In an embodiment of the present application, the circuit board is a multi-layer board, the middle column includes an upper sidewall and a lower sidewall which are symmetrically distributed with respect to the center of the middle column, the upper sidewall corresponds to the first space, the lower sidewall corresponds to the second space, the input end and the first end have a first winding segment, the first winding segment winds around the upper sidewall and the lower sidewall of the middle column, the first winding segment passes through the upper sidewall for N times, the first winding segment passes through the lower sidewall for N-1 times, the output end and the second end have a second winding segment, the second winding segment winds around the lower sidewall of the middle column, and the second winding segment passes through the lower sidewall for 1 time.
[0016] In an embodiment of the present application, the circuit board includes a first layer and a second layer, a conductive structure is arranged between the first layer and the second layer, the first winding segment includes a first section and a second section, the first section is located on the first layer, the second section is located on the second layer, the first section completely winds around the upper sidewall and the lower sidewall of the middle column and is electrically connected to the second section through the conductive structure, and the second section winds around the upper sidewall.
[0017] In an embodiment of the present application, the second winding segment is located on the second layer.
[0018] In an embodiment of the present application, the magnetic element further includes a third trace and a conductive structure. The third trace passes through between the middle column and the first side column and between the middle column and the second side column. The conductive structure connects the third trace and the first trace.
[0019] In an embodiment of the present application, the first trace and the second trace have a first spacing, a second spacing and a third spacing, and the first spacing is greater than the second spacing, and the second spacing is greater than or equal to the third spacing.
[0020] Based on the above, in the inductance trace structure of the present application, the middle column and the two side columns have a first space and a second space respectively, the first trace passes through at least the first space to surround the middle column, and the second trace only passes through the second space to surround the middle column. Therefore, the total number of windings formed by the inductance trace in the first space is equal to the total number of windings formed by the inductance trace in the second space, which can maintain a relatively uniform magnetic core magnetic flux distribution and effectively reduce the winding loss of the copper wire.
[0021] In order to make the above features and advantages of the present application more obvious and easy to understand, the following embodiments are described in detail below, and the drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a top view schematic diagram of the inductance trace structure of an embodiment of the present application;
[0023] Figure 2 is Figure 1 the circuit diagram of the inductance trace structure of
[0024] Figure 3 is Figure 2 application architecture schematic diagram of the inductance trace structure of the present application;
[0025] Figures 4A-4D is Figure 3 circuit diagram of the inductance trace structure of the present application in different application architectures;
[0026] Figure 5A is a three-dimensional schematic diagram of a magnetic element of an embodiment of the present application;
[0027] Figure 5B is Figure 5A disassembly diagram of the magnetic element of the present application;
[0028] Figure 5C is Figure 5A path schematic diagram of the inductance trace on the circuit board of the present application;
[0029] Figure 5C is a path schematic diagram of the inductance trace on the circuit board of another embodiment of the present application;
[0030] Figure 5D is Figure 5A top view schematic diagram of the inductance trace on the core member of the present application;
[0031] Figure 6A is a three-dimensional schematic diagram of a magnetic element of an embodiment of the present application;
[0032] Figure 6B is Figure 6A disassembly diagram of the magnetic element of the present application;
[0033] Figure 6C is Figure 6A path schematic diagram of the inductance trace on the circuit board of the present application;
[0034] Figure 6D is Figure 6A top view schematic diagram of the inductance trace on the core member of the present application;
[0035] Figure 7A and Figure 7B is a three-dimensional schematic diagram of a core member of a plurality of embodiments of the present application;
[0036] Figure 8 and Figure 9 is a three-dimensional schematic diagram of an inductance trace structure of a plurality of embodiments of the present application.
[0037] BRIEF DESCRIPTION OF DRAWINGS
[0038] 100, 100D, 100E: inductance trace structure
[0039] 50B, 50C: magnetic element
[0040] 110: Inductive trace
[0041] 110B: Trace
[0042] 111, 111B: First trace
[0043] 1111, 1111B, 1111C: First winding segment
[0044] 112, 112B: Second trace
[0045] 1121, 1121B, 1121C: Second winding segment
[0046] 120, 120B, 120C, 120D, 120F, 120G: Core piece
[0047] 121, 121B, 121C, 121F, 121G: Base
[0048] 122, 122B, 122C, 122F, 122G: Pillar
[0049] 1221, 1221B, 1221C, 1221F, 1221G: Upper sidewall
[0050] 1222, 1222B, 1222C, 1222F, 1222G: Lower sidewall
[0051] 123, 123D, 123F, 123G: Side pillar
[0052] 123B, 123C: First side pillar
[0053] 124B, 124C: Second side pillar
[0054] 125B, 125C: Upper cover
[0055] 130, 130B, 130C, 130D, 130E: Circuit board
[0056] 1301, 1302, 1303, 1304, 1305, 1306: Copper wire
[0057] X1, X2, X3, X4, X5, X6: Line width
[0058] 131: First layer board
[0059] 132: Second layer board
[0060] 133: Via
[0061] 200: Transformer
[0062] 201: primary side coil
[0063] 202: secondary side coil
[0064] A1: input terminal
[0065] A2: output terminal
[0066] B1: first end
[0067] B2: second end
[0068] G1: first distance
[0069] G2: second distance
[0070] G3, G3’: third distance
[0071] N1: first direction
[0072] S1: first space
[0073] S2: second space
[0074] T1: first section
[0075] T2: second section
[0076] Lr: resonant inductance
[0077] Lm: magnetizing inductance
[0078] Lr1: primary side resonant inductance
[0079] Lr2: secondary side resonant inductance
[0080] 1A: primary side circuit
[0081] 2A: transformer
[0082] 22A: primary side coil
[0083] 24A: secondary side coil
[0084] 3A: secondary side circuit
[0085] Q1, Q2: power switch
[0086] SR1, SR2: rectifier switch
[0087] 24A-1: first coil
[0088] 24A-2: second coil DETAILED DESCRIPTION
[0089] Generally, the inductance winding is wound to a full circle and then connected to the next layer or element, so that the inductance reaches the design value, and the magnetic flux distribution of the inductance magnetic core can be kept uniform distribution. However, the inductance winding of a full circle cannot reduce the copper loss in other ways. The inductance winding structure of the utility model can solve the above problems.
[0090] Figure 1 is a top view schematic diagram of the inductance winding structure of an embodiment of the utility model. Figure 2 Figure 1 is a circuit diagram of the inductance winding structure of Figure 3 Figure 2 is an application architecture schematic diagram of the inductance winding structure of
[0091] Figures 4A-4D is a circuit diagram of the inductance winding structure of Figure 3 in different application architectures. It should be noted that, Figure 1 only the relative positions of the elements are simply shown schematically, and the actual size ratio is not limited thereto.
[0092] Please refer to Figure 1 and Figure 2 , the inductance winding structure 100 of the embodiment includes an inductance winding 110 and a core member 120. The inductance winding 110 has an input end A1 and an output end A2, and includes a first winding 111 connected to the input end A1 and a second winding 112 connected to the output end A2.
[0093] In the embodiment, the first winding 111 has a first end B1 away from the input end A1, the second winding 112 has a second end B2 away from the output end A2, the input end A1 and the output end A2 are located on one side of the core member 120, and the first end B1 and the second end B2 are located on the other side of the core member 120.
[0094] In an embodiment, the cross-sectional area of the middle column 122 is greater than that of each side column 123, but the utility model is not limited thereto.
[0095] In the embodiment, the core member 120 is magnetically coupled to the inductance winding 110, and the core member 120 includes a base 121, a middle column 122 protruding from the base 121, and two side columns 123. The middle column 122 and the two side columns 123 have a first space S1 and a second space S2 therebetween, respectively.
[0096] In the embodiment, the center column 122 includes an upper sidewall 1221 and a lower sidewall 1222 which are distinguished in the center column 122. The upper sidewall 1221 corresponds to the first space S1, and the lower sidewall 1222 corresponds to the second space S2. Specifically, the upper sidewall 1221 and the adjacent side column 123 define the first space S1, and the lower sidewall 1222 and the adjacent side column 123 define the second space S2. The utility model is not limited thereto.
[0097] In the embodiment, there is a first winding segment 1111 between the input end A1 and the first end B1, the first winding segment 1111 winds the upper sidewall 1221 and the lower sidewall 1222 of the center column 122, the first winding segment 1111 passes through the upper sidewall 1221 for N times, and the first winding segment 1111 passes through the lower sidewall 1222 for N-1 times. Here, N is 2, but the utility model is not limited thereto. In the embodiment, there is a second winding segment 1121 between the output end A2 and the second end B2, the second winding segment 1121 winds the lower sidewall 1222 of the center column 122, and the second winding segment 1121 passes through the lower sidewall 1222 for 1 time. In this way, the total winding number of the inductance wire 110 formed in the first space S1 is equal to the total winding number of the inductance wire 110 formed in the second space S2, the relative uniform magnetic core magnetic flux distribution can be maintained, and the winding loss of the copper wire can be effectively reduced.
[0098] Specifically, in the embodiment, the first wire 111 extends into the core member 120 from left to right along the direction perpendicular to the first direction N1, passes through the first space S1, and winds the upper half of the center column 122 in the clockwise direction, then enters the second space S2 to wind the lower half of the center column 122 in the clockwise direction, thereby winding the complete center column 122 for one turn, then returns to the first space S1 to wind the upper half of the center column 122 in the clockwise direction, and finally moves out of the core member 120 to the right with the end as the first end B1. In this way, the first wire 111 winds the upper side of the center column 122, that is, the first space S1 for two times (forms two layers). The first wire 111 winds the lower side of the center column 122, that is, the second space S2 for one time (forms one layer). Here, the upper half of the center column 122 refers to the position corresponding to the upper sidewall 1221, and the lower half of the center column 122 refers to the position corresponding to the lower sidewall 1222, but the utility model is not limited thereto.
[0099] Similarly, in the embodiment, the second wire 112 extends into the core member 120 from left to right and winds the lower half of the center column 122 in the counterclockwise direction through the second space S2, and finally moves out of the core member 120 to the right with the end as the second end B2. In this way, the second wire 112 winds the lower side of the center column 122, that is, the second space S2 for one time (forms one layer).
[0100] Therefore, the total number of turns of the inductor winding 110 formed in the first space S1 is 2, and the total number of turns of the inductor winding 110 formed in the second space S2 is also 2. In this way, the total number of turns of the inductor winding 110 formed in the first space S1 is equal to the total number of turns of the inductor winding 110 formed in the second space S2, so that the relative uniform distribution of the magnetic flux of the core can be maintained, and the winding loss of the copper wire can be effectively reduced.
[0101] In the above embodiment, the total number of turns of the inductor winding 110 is 2, but it is not limited thereto. In other embodiments, the total number of turns of the inductor winding is 1, the first winding passes through the first space to wind in the first space once (to form 1 layer), and the second winding only passes through the second space to wind in the second space once (to form 1 layer). Therefore, the total number of turns of the inductor winding formed in the first space is 1, and the total number of turns of the inductor winding formed in the second space is also 1. In this way, the total number of turns of the inductor winding formed in the first space is equal to the total number of turns of the inductor winding formed in the second space, so that the relative uniform distribution of the magnetic flux of the core can be maintained, the imbalance of the core magnetic flux can be avoided, the winding loss of the copper wire can be effectively reduced, and the overall volume can be effectively reduced.
[0102] In addition, in an embodiment, the first end B1 and the second end B2 are used to connect a transformer 200, but it is not limited thereto. The two side columns 123 are arranged in a first direction N1, and the extension direction of the primary side coil 201 of the transformer 200 and the extension direction of the secondary side coil 202 of the transformer 200 are parallel to the first direction N1.
[0103] Here, the inductor winding structure 100 is applicable to an architecture containing a resonant inductor and a transformer. The first winding 111 and the second winding 112 both pass through the core member 120 and can pass through one or two secondary side switches and the transformer, so that the current loop presents a closed loop, the resonant inductor generates magnetic flux and normally operates. In this embodiment, L r is a resonant inductor, L m is an excitation inductor. Under the above configuration, after the resonant inductor part turns, it is connected to the transformer 200 first, and then the resonant inductor is pulled back to make up the remaining turns, so that the overall space utilization of the inductor winding structure 100 is good, the resonant inductor is wound around the complete n turns of the middle column 122, the core magnetic flux is balanced, and no additional circuit board space is needed.
[0104] Please refer to Figure 3 , L r1 is a primary side resonant inductor, L r2 is a secondary side resonant inductor, that is, the resonant inductor of the present embodiment can be placed on the primary side or the secondary side, used as a resonant application or to assist the switch to perform zero voltage switching, which is called a resonant inductor.
[0105] Further, the application architecture of the inductor winding structure 100 can beFigure 4A LLC resonant converter Figure 4B CCL resonant converter Figure 4C CLLC resonant converter or Figure 4D The present invention does not limit the scope of the full-bridge phase shift converter.
[0106] by Figure 4A For example, an LLC resonant converter includes a primary-side circuit 1A, a transformer 2A, and a secondary-side circuit 3A. The primary-side circuit 1A includes two power switches Q1 and Q2 connected in series. The secondary-side circuit 3A includes a rectifier circuit 32, which includes rectifier switches SR1 and SR2. The secondary-side coil 24A of the transformer 2A includes a first coil 24A-1 and a second coil 24A-2. In one embodiment, Figure 4A The LLC resonant converter can control the rectifier switches SR1 and SR2 to turn on or off via a controller (not shown), so that the first coil 24A-1 and the second coil 24A-2 are respectively coupled to the primary-side coil 22A. Here, the circuit structure of the primary-side circuit 1A and the secondary-side circuit 3A is only schematically shown, and this utility model does not limit it. In addition, in one embodiment, the transformer 2A can be as follows: Figure 4A The example shown is of one type, but is not limited thereto. In another embodiment, it may include one or more transformers 2A. This invention is not limited thereto.
[0107] Other embodiments will be listed below for illustration. It must be noted that the following embodiments use the component reference numerals and some content from the foregoing embodiments, where the same reference numerals are used to represent the same or similar components, and descriptions of the same technical content are omitted. For explanations of the omitted parts, please refer to the foregoing embodiments; these will not be repeated in the following embodiments.
[0108] Figure 5A This is a three-dimensional schematic diagram of a magnetic element according to an embodiment of the present invention. Figure 5B yes Figure 5A Disassembly diagram of the magnetic components. Figure 5C yes Figure 5A A schematic diagram of the inductor traces on a circuit board. Figure 5D yes Figure 5A A top-view diagram of the inductor traces on the iron core component. It should be noted that... Figure 5C The routing path is schematically shown using thick line segments, while Figure 5D The circuit board has been omitted for ease of description. Please refer to [link / reference]. Figures 5A-5DThe magnetic element 50B of the embodiment includes a core member 120B. The core member 120B includes a base 121B, an upper cover 125B, a middle column 122B, a first side column 123B, and a second side column 124B. The middle column 122B, the first side column 123B, and the second side column 124B are disposed between the base 121B and the upper cover 125B, and the middle column 122B is between the first side column 123B and the second side column 124B. In an embodiment, the middle column 122B of the core member 120B passes through the through hole 133 of the circuit board 130. As shown in Figure 5C The magnetic element 50B includes a wire 110B, for example, a planar winding, formed on a printed circuit board (PCB) 130, but the utility model is not limited thereto.
[0109] In the embodiment, the circuit board 130 is a single-layer board. That is, the magnetic element 50B is designed as a planar inductor by the PCB wire method, but the utility model is not limited thereto.
[0110] Please refer to Figure 5C and Figure 5D In the embodiment, the first wire 111B passes between the middle column 122B and the first side column 123B, and the second wire 112B passes between the middle column 122B and the second side column 123B. Specifically, the first winding segment 1111B of the first wire 111B winds around the upper side wall 1221B of the middle column 122B, and the second winding segment 1121B of the second wire 112B winds around the lower side wall 1222B of the middle column 122B. That is, the first wire 111B passes through the first space S1 to wind once (form 1 layer) in the first space S1. The second wire 112B only passes through the second space S2 to wind once (form 1 layer) in the second space S2. Therefore, the total number of windings of the inductor wire 110B formed in the first space is 1, and the total number of windings of the inductor wire 110B formed in the second space S2 is also 1. In this way, the total number of windings of the inductor wire 110B formed in the first space S1 is equal to the total number of windings of the inductor wire 110B formed in the second space S2, which can achieve a relatively uniform magnetic core magnetic flux distribution, avoid imbalance of the core magnetic flux, effectively reduce the winding loss of the copper wire, and effectively reduce the overall volume.
[0111] As shown in Figure 5C In the embodiment, the first wire 111B and the second wire 112B do not contact each other, which means that the first wire 111B and the second wire 112B do not have structural physical contact. Therefore, there is a spacing between the first wire 111B and the second wire 112B. Here, the minimum spacing between the first wire 111B and the second wire 112B is greater than zero.
[0112] For example, in the embodiment, the first trace 111B and the second trace 112B have a first spacing G1, a second spacing G2 and a third spacing G3. Here, the second spacing G2 is the gap defined between the input end A1 and the output end A2. The first spacing G1 is the gap defined between the first winding segment 1111B and the second winding segment 1121B. The third spacing G3 is the gap defined between the first end B1 and the second end B2.
[0113] In the embodiment, the first spacing G1 is greater than the second spacing G2, and the second spacing G2 is greater than the third spacing G3, but the utility model is not limited thereto. Figure 5C is the path diagram of the inductance trace on the circuit board of another embodiment of the utility model. Please refer to Figure 5C In an embodiment, the first spacing G1 is greater than the second spacing G2, and the second spacing G2 is equal to the third spacing G3', but the utility model is not limited thereto.
[0114] Figure 6A is the three-dimensional diagram of the magnetic element of an embodiment of the utility model. Figure 6B is Figure 6A is the exploded view of the magnetic element of Figure 6A and Figure 6B In the embodiment, the magnetic element 50C and the magnetic element 50B of Figure 5A are slightly different, and the main difference is that the circuit board 130C is a multilayer board, and the magnetic element 50C further comprises a conduction structure 140.
[0115] In the embodiment, the core member 120C comprises a base 121C, an upper cover 125C, a middle column 122C, a first side column 123C and a second side column 124C. The middle column 122C, the first side column 123C and the second side column 124C are arranged between the base 121C and the upper cover 125C, and the middle column 122C is located between the first side column 123C and the second side column 124C.
[0116] In the embodiment, the circuit board 130C comprises a first layer board 131 and a second layer board 132, and the conduction structure 140 is arranged between the first layer board 131 and the second layer board 132.
[0117] Figure 6C is the path diagram of the inductance trace on the circuit board of Figure 6A . Figure 6D is the top view diagram of the inductance trace on the core member of Figure 6A . It should be noted that, Figure 6C the trace path is schematically shown by thick line segments in the figure, and Figure 6D the circuit board is omitted for description. Here, the size of the conduction structure is only schematically shown, and the actual size is not limited thereto.
[0118] Please refer to Figure 6C With Figure 6D In this embodiment, the first winding segment 1111C includes a first segment T1 and a second segment T2, the first segment T1 is located on the first layer plate 131, and the second segment T2 is located on the second layer plate 132, the first segment T1 completely surrounds the upper sidewall 1221C and the lower sidewall 1222C of the middle column 122C and is electrically connected to the second segment T2 through the conductive structure 140, and the second segment T2 is wound around the upper sidewall 1221C. The second winding segment 1121C is located on the second layer plate 132. The second segment T2 does not contact the second winding segment 1121C, which means that the second segment T2 and the second winding segment 1121C do not have structural physical contact. Therefore, there is a spacing between the second segment T2 and the second winding segment 1121C. Here, the minimum spacing between the second segment T2 and the second winding segment 1121C is greater than zero. Further, the first layer plate 131 where the first segment T1 is located can be understood as a trace between the middle column 122C and the first side column 123C and between the middle column 122C and the second side column 124C. Similarly, the part of the second layer plate 132 corresponding to the second segment T2 can be understood as a trace between the middle column 122C and the first side column 123C. The part of the second layer plate 132 corresponding to the second winding segment 1121C can be understood as a trace between the middle column 122C and the second side column 124C.
[0119] In this embodiment, the first winding segment 1111C passes through the upper sidewall 1221C twice and the lower sidewall 1222C once, but the present application is not limited thereto. In this embodiment, the second winding segment 1121C passes through the lower sidewall 1222C once. In this way, the total number of windings formed by the inductor trace 110 in the first space S1 is equal to the total number of windings formed by the inductor trace 110 in the second space S2, which can achieve a relatively uniform magnetic core magnetic flux distribution, avoid core magnetic flux imbalance, and effectively reduce the winding loss of the copper wire. It can also effectively reduce the overall volume.
[0120] In addition, in Figure 5B With Figure 5C In the above embodiment, the middle column 122B, 122C of the core member 120B, 120C is a long oval column, but the present application is not limited thereto. Figure 7A With Figure 7B is a three-dimensional schematic view of the core member of the plurality of embodiments of the present application. Figure 7A The core member 120F includes a base 121F, a middle column 122F protruding from the base 121F, and two side columns 123F. Here, the middle column 122F is a cylindrical column, and the side column 123F has an arc-shaped notch, but the present application is not limited thereto. Figure 7BThe iron core piece 120G includes a base 121G, a middle column 122G protruding from the base 121G, and two side columns 123G, where the base 121G is two opposite fan-shaped structures, and the side column 123G has a notch corresponding to the outer contour of the middle column 122G, and the utility model is not limited thereto.
[0121] Figure 8 With Figure 9 It is a three-dimensional schematic diagram of the inductance wiring structure of the plurality of embodiments of the utility model. It should be noted that, Figure 8 With Figure 9 Only the relative positions of the elements are simply shown schematically, and the actual size ratio is not limited thereto. Please refer to Figure 8 The iron core piece 120D of the inductance wiring structure 100D includes a base 121D, a middle column 122D protruding from the base 121D, and two side columns 123D, and the line width X1 of the copper wire 1301 between one of the two side columns 123D of the circuit board 130D to the middle column 122D is equal to the line width X2 of the copper wire 1302 between the other of the two side columns 123D to the middle column 122D.
[0122] Please refer to Figure 9 The line width X3 of the copper wire 1303 of the circuit board 130E is equal to the line width X4 of the copper wire 1304, and the line width X5 of the copper wire 1305 is equal to the line width X6 of the copper wire 1306. Here, the line width X3 can be equal to or not equal to the line width X6, and the utility model is not limited thereto.
[0123] In summary, in the inductance wiring structure of the utility model, the middle column and the two side columns have a first space and a second space therebetween, and the first wiring at least passes through the first space to surround the middle column, and the second wiring only passes through the second space to surround the middle column. Therefore, the total number of windings formed by the inductance wiring in the first space is equal to the total number of windings formed by the inductance wiring in the second space, which can achieve a relatively uniform magnetic core magnetic flux distribution, avoid imbalance of the core magnetic flux, effectively reduce the winding loss of the copper wire, and effectively reduce the overall volume. In an embodiment, the inductance wiring structure can also complete the design of the planar inductance through the PCB wiring.
[0124] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. An inductive wiring structure, characterized by comprising: The inductor winding has an input end and an output end, and includes a first winding connected to the input end and a second winding connected to the output end. The core member is magnetically coupled to the inductor winding, and includes a base, a middle column protruding from the base, and two side columns, the middle column and the two side columns have a first space and a second space between them respectively, the first winding passes through at least the first space to surround the middle column, and the second winding passes through the second space to surround the middle column, wherein the number of times the inductor winding passes through the first space is equal to the number of times the inductor winding passes through the second space. The cross-sectional area of the middle column is greater than that of each side column. The first winding has a first end away from the input end, and the second winding has a second end away from the output end, the input end and the output end are located on one side of the core member, and the first end and the second end are located on the other side of the core member.
2. The inductive trace structure of claim 1, wherein, The middle column includes an upper sidewall and a lower sidewall which are symmetrically divided with the center of the middle column, the upper sidewall corresponds to the first space, and the lower sidewall corresponds to the second space, the input end and the first end have a first winding segment, the first winding segment winds around the upper sidewall of the middle column, and the output end and the second end have a second winding segment, the second winding segment winds around the lower sidewall of the middle column.
3. The inductive trace structure of claim 1, wherein, The middle column includes an upper sidewall and a lower sidewall which are symmetrically divided with the center of the middle column, the upper sidewall corresponds to the first space, and the lower sidewall corresponds to the second space, the input end and the first end have a first winding segment, the first winding segment winds around the upper sidewall and the lower sidewall of the middle column, the first winding segment passes through the upper sidewall N times, and the first winding segment passes through the lower sidewall N-1 times, the output end and the second end have a second winding segment, the second winding segment winds around the lower sidewall of the middle column, and the second winding segment passes through the lower sidewall once.
4. The inductive trace structure of claim 3, wherein, The first end and the second end are used to connect a transformer.
5. The inductive trace structure of claim 3, wherein, The two side columns are arranged in a first direction, and the extension direction of the primary side coil of the transformer and the extension direction of the secondary side coil of the transformer are parallel to the first direction.
6. The inductor trace structure of claim 3, wherein, The inductor winding has an input end and an output end, and includes a first winding connected to the input end and a second winding connected to the output end.
7. The inductive trace structure of claim 6, wherein, The core member is magnetically coupled to the inductor winding, and includes a base, a middle column protruding from the base, and two side columns, the middle column and the two side columns have a first space and a second space between them respectively, the first winding passes through at least the first space to surround the middle column, and the second winding passes through the second space to surround the middle column, wherein the number of times the inductor winding passes through the first space is equal to the number of times the inductor winding passes through the second space.
8. An inductive wiring structure, characterized by The circuit board, and the inductor winding is formed on the circuit board, and the middle column passes through the through hole of the circuit board. The cross-sectional area of the middle column is greater than that of each side column. 9. The inductive trace structure of claim 8, wherein, 10. The inductive trace structure of claim 8, wherein, The first wire has a first end away from the input end, and the second wire has a second end away from the output end. The input end and the output end are located on one side of the core member, and the first end and the second end are located on the other side of the core member.
11. The inductive trace structure of claim 10, wherein, The circuit board is a single-layer board, the middle column includes an upper sidewall and a lower sidewall which are distinguished by the center of the middle column, the upper sidewall corresponds to the first space, and the lower sidewall corresponds to the second space. There is a first winding segment between the input end and the first end, and the first winding segment winds around the upper sidewall of the middle column. There is a second winding segment between the output end and the second end, and the second winding segment winds around the lower sidewall of the middle column.
12. The inductive line structure of claim 10, wherein, The circuit board is a multi-layer board, the middle column includes an upper sidewall and a lower sidewall which are distinguished by the center of the middle column, the upper sidewall corresponds to the first space, and the lower sidewall corresponds to the second space. There is a first winding segment between the input end and the first end, and the first winding segment winds around the upper sidewall and the lower sidewall of the middle column. The first winding segment passes through the upper sidewall N times, and the first winding segment passes through the lower sidewall N-1 times. There is a second winding segment between the output end and the second end, and the second winding segment winds around the lower sidewall of the middle column. The second winding segment passes through the lower sidewall once.
13. The inductive trace structure of claim 12, wherein, The circuit board includes a first layer and a second layer, and a conductive structure is provided between the first layer and the second layer. The first winding segment includes a first section and a second section. The first section is located on the first layer, and the second section is located on the second layer. The first section completely surrounds the upper sidewall and the lower sidewall of the middle column and is electrically connected to the second section through the conductive structure. The second section winds around the upper sidewall.
14. The inductive trace structure of claim 13, wherein, The second winding segment is located on the second layer.
15. The inductive line structure of claim 10, wherein, The first end and the second end are used to connect a transformer.
16. The inductive line structure of claim 15, wherein, The two side columns are arranged in a first direction, and the extension direction of the primary side coil of the transformer and the extension direction of the secondary side coil of the transformer are parallel to the first direction.
17. A magnetic element, comprising: Comprise: Wires, including a first wire and a second wire; And A core member including a base, an upper cover, a middle column, a first side column, and a second side column. The middle column, the first side column, and the second side column are arranged between the base and the upper cover, and the middle column is located between the first side column and the second side column. The first wire passes through the middle column and the first side column, the second wire passes through the middle column and the second side column, and the first wire and the second wire do not contact each other.
18. The magnetic element of claim 17, wherein, Further comprise: A third wire passing through the middle column and the first side column and passing through the middle column and the second side column; And A conductive structure connecting the third wire and the first wire.
19. The magnetic element of claim 17, wherein, The first wire and the second wire have a first spacing, a second spacing, and a third spacing, and the first spacing is greater than the second spacing, and the second spacing is greater than or equal to the third spacing.