CN215342247U - Surface-mounted inductor and circuit board - Google Patents
Surface-mounted inductor and circuit board Download PDFInfo
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- CN215342247U CN215342247U CN202121409626.XU CN202121409626U CN215342247U CN 215342247 U CN215342247 U CN 215342247U CN 202121409626 U CN202121409626 U CN 202121409626U CN 215342247 U CN215342247 U CN 215342247U
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- flat wire
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- 238000004804 winding Methods 0.000 abstract description 45
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000011162 core material Substances 0.000 description 24
- 238000005452 bending Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a surface-mounted inductor, which comprises an insulating bottom plate and an inductor winding, wherein the insulating bottom plate is provided with a plurality of insulating layers; the inductance winding is formed by winding a flat conducting wire for a plurality of turns; the width of the flat wire is larger than the thickness of the flat wire; the thickness direction of the flat wire is in the axial direction of the inductance winding, and the width direction of the flat wire is in the radial direction of the inductance winding; the insulating bottom plate is provided with a first conductive pin and a second conductive pin; two ends of the flat wire are respectively and electrically connected to a first conductive pin and a second conductive pin of the insulating bottom plate; the axis of the inductance winding is vertical to the insulating bottom plate; a circular through hole is formed in the middle of the insulating base plate corresponding to the inner ring of the inductance winding. The utility model also discloses a circuit board. The surface-mounted inductor has the advantages of larger inductance, simple structure, low manufacturing cost, larger current density design value, smaller overall occupied space and better heat dissipation.
Description
Technical Field
The present invention relates to electronic technologies, and in particular, to a surface mount inductor and a circuit board.
Background
Along with the increasingly important environmental protection requirements of social development, the energy conservation and emission reduction of the automobile industry are under increasing pressure, 48V micro-hybrid systems are researched more and more, the standard voltage of automobile equipment is increased to 48V for use, the power of the whole system is improved, the working conditions of starting and stopping an engine, starting, braking and the like can be better optimized, and the oil saving efficiency is greatly improved; the circuit commonly adopted in the automobile 48V electric energy conversion unit direct current converter is a bidirectional Buck-Boost circuit, the circuit can be shown in figure 1, the circuit adopts a plurality of Buck circuits in parallel when the circuit is converted from 48V to 12V, and the plurality of Buck circuits in parallel when the circuit is converted from 12V to 48V in the reverse direction. In this circuit, one filter inductor (L) is required for each parallel branch1、L2……Ln) As shown in fig. 1, the power inductor serves to store energy and filter ripple current. The current industry types of the power inductor can be roughly divided into two types, one type is a common independent inductor, where independent means that the inductor is independent from a main power PCB (printed circuit board), and the two types are soldered or Surface Mounted (SMT) on the PCB through pin pins (pins) of the inductor, for this way, a converter developer generally finds an inductor supplier to buy the independent inductor, but the cost of the independent inductor is relatively high and is not optimal after being processed by the inductor supplier; one is planar or notThe inductance is not independent of a main power PCB, the winding part of the inductance is realized by the PCB, then the appropriate magnetic core is directly used, and a converter developer is directly assembled and formed, so that the processing of an intermediate link of an inductance supplier is omitted, and the cost is very advantageous at present; however, the planar inductor utilizes the PCB winding, the PCB winding has limited current carrying capacity due to the limitation of the layer thickness of the PCB winding, and the multilayer PCB has limited layer number in the current industry, and relatively high cost, so that the number of turns of the inductor is limited in the design of the planar inductor, and when the inductor core material does not have a large development space, the planar inductor is caused, and in the limited layout space, with the improvement of the power density requirement and the control of the converter cost, sufficient inductance cannot be provided, and the application range is relatively limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a surface-mounted inductor which has the advantages of larger designed inductance, simple structure, low manufacturing cost, larger design value of current density, smaller overall occupied space and better heat dissipation.
In order to solve the technical problem, the surface-mounted inductor provided by the utility model comprises an insulating base plate 1 and an inductor winding 2;
the inductance winding 2 is formed by winding a flat conducting wire for a plurality of turns;
the width of the flat wire is larger than the thickness of the flat wire;
the thickness direction of the flat wire is in the axial direction of the inductance winding, and the width direction of the flat wire is in the radial direction of the inductance winding;
the insulating bottom plate 1 is provided with a first conductive pin 11 and a second conductive pin 12;
two ends of the flat wire are respectively and electrically connected to a first conductive pin 11 and a second conductive pin 12 of the insulating base plate 1;
the axis of the inductance winding 2 is perpendicular to the insulating bottom plate 1;
and a circular through hole 10 is formed in the middle of the insulating base plate 1 corresponding to the inner ring of the inductance winding 2.
Preferably, the insulating base plate 1 is further provided with a third pin 13;
the first conductive pin 11 and the second conductive pin 12 are located on the left side of the circular through hole 10, and the third pin 13 is located on the right side of the circular through hole 10.
Preferably, the flat wire at one end of the inductance winding 2 is flatly attached to the insulating base plate 1.
Preferably, the width of the flat wire is 2 to 15 times of the thickness of the flat wire.
Preferably, the inductance winding 2 is formed by winding a flat wire for 3-10 turns.
Preferably, the flat wire is made of copper.
Preferably, the insulating base plate 1 is made of plastic.
Preferably, the inductance winding 2 and the insulating base plate 1 are fixed together by glue.
Preferably, the first conductive pin 11 is formed by bending one end of the flat wire and then fixing the bent end on the insulating base plate 1;
the second conductive pins 12 are formed by bending the other end of the flat wire and then fixing the bent end on the insulating base plate 1.
The utility model also provides the circuit board with the surface mounted inductor, which further comprises a printed circuit board 3 and a magnetic core 4;
the magnetic core 4 comprises an E-shaped magnetic core;
the printed circuit board 3 is provided with a bottom plate placing hole matched with the insulating bottom plate 1;
side column mounting holes matched with the side columns 41 of the E-shaped magnetic core are formed in the front side and the rear side of the bottom plate mounting hole of the printed circuit board 3;
the insulating bottom plate 1 with the surface mounted inductor is assembled to the bottom plate placing hole;
the E-shaped magnetic core is fixed to the printed circuit board 3 with its side post 41 passing through the side post seating hole and with its post 40 inserted axially into the inner ring of the inductance winding 2.
Preferably, the magnetic core 4 is formed by buckling two E-shaped magnetic cores.
Preferably, the magnetic core 4 is formed by combining an E-type magnetic core and an I-type magnetic core.
The surface-mounted inductor is realized by combining the simple multi-turn flat lead with the insulating base plate, is independent of a Printed Circuit Board (PCB), can properly design the number of turns required by the inductor winding 1 without the limitation of the number of layers of the PCB, has a larger designed inductance, simple structure, low manufacturing cost and wider application range; meanwhile, the sectional area of the flat conducting wire used by the inductance winding 1 can be properly designed, the current density can be adjusted, a larger current density design value can be achieved, the overall occupied space can be smaller, the inductance winding 1 is in direct contact with air, the radiating surface is larger, the heat dissipation is better, and the hot air risk is smaller.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a bidirectional Buck-Boost circuit diagram;
FIG. 2 is a schematic structural diagram of an embodiment of a surface mount inductor according to the present invention;
FIG. 3 is a schematic view of an embodiment of an insulated base plate of the surface mount inductor of the present invention;
FIG. 4 is a schematic diagram of a circuit board of an embodiment of the present invention with surface mount inductors mounted thereon;
FIG. 5 is a diagram of a circuit board with a surface mount inductor and a magnetic core according to an embodiment of the present invention.
The reference numbers in the figures illustrate:
1, insulating a bottom plate; 10 through holes; 11 a first conductive pin; 12 a second conductive pin; 13 a third stitch; 2, an inductance winding; 3 a printed circuit board; 4 magnetic cores; 41 side columns; 40 column.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 2, a Surface Mount Technology (SMT) inductor includes an insulating base plate 1, an inductor winding 2;
the inductance winding 2 is formed by winding a flat conducting wire for a plurality of turns;
the width of the flat wire is larger than the thickness of the flat wire;
the thickness direction of the flat wire is in the axial direction of the inductance winding, and the width direction of the flat wire is in the radial direction of the inductance winding;
the insulating bottom plate 1 is provided with a first conductive pin 11 and a second conductive pin 12;
two ends of the flat wire are respectively and electrically connected to a first conductive pin 11 and a second conductive pin 12 of the insulating base plate 1;
the axis of the inductance winding 2 is perpendicular to the insulating bottom plate 1;
and a circular through hole 10 is formed in the middle of the insulating base plate 1 corresponding to the inner ring of the inductance winding 2.
In the surface-mounted inductor of the first embodiment, the inductor winding 2 is formed by winding a flat wire into a plurality of turns, and the first conductive pin 11 and the second conductive pin 12 arranged on the insulating base plate 1 are used for connecting the input end and the output end of the circuit; the circular through hole 10 formed in the middle of the insulating base plate 1 corresponding to the inner ring of the inductance winding 2 is used for the magnetic core center pillar to pass through.
The surface-mounted inductor of the first embodiment is realized by combining a simple multi-turn flat wire with the insulating base plate, is independent of a Printed Circuit Board (PCB), can properly design the number of turns required by the inductor winding 1 without the limitation of the number of layers of the PCB, and has the advantages of larger designability of inductance, simple structure, low manufacturing cost and wider application range; meanwhile, the sectional area of the flat conducting wire used by the inductance winding 1 can be properly designed, the current density can be adjusted, a larger current density design value can be achieved, the overall occupied space can be smaller, the inductance winding 1 is in direct contact with air, the radiating surface is larger, the heat dissipation is better, and the hot air risk is smaller. This surface mounting inductance can directly put the corresponding position on PCB through SMT technology's suction nozzle or tongs, then the surface mounting welding is on PCB, is convenient for paste the dress to PCB through SMT technology.
Example two
Based on the surface mount inductor of the first embodiment, the insulating base plate 1 is further provided with a third pin 13;
the first conductive pin 11 and the second conductive pin 12 are located on the left side of the circular through hole 10, and the third pin 13 is located on the right side of the circular through hole 10.
The flat conductor at one end of the inductance winding 2 is flatly attached to the insulating base plate 1.
Preferably, the width of the flat wire is 2 to 15 times of the thickness of the flat wire.
Preferably, the inductance winding 2 is formed by winding a flat wire for 3-10 turns.
Preferably, the flat wire is made of copper.
Preferably, the insulating base plate 1 is made of plastic.
Preferably, the inductance winding 2 and the insulating base plate 1 are fixed together by glue.
Preferably, the first conductive pin 11 is formed by bending one end of the flat wire and then fixing the bent end on the insulating base plate 1;
the second conductive pins 12 are formed by bending the other end of the flat wire and then fixing the bent end on the insulating base plate 1.
In the surface mount inductor of the second embodiment, the third pins 13 disposed on the insulating base plate 1 are pins for fixing, have no electrical property, and are used to ensure that no vibration occurs after the surface mount inductor is Surface Mounted (SMT) on a PCB.
EXAMPLE III
A circuit board comprising a surface mount inductor of one embodiment or two embodiments, further comprising a Printed Circuit Board (PCB)3, a magnetic core 4;
the magnetic core 4 comprises an E-shaped magnetic core;
a bottom plate placing hole matched with the insulating bottom plate 1 is formed in the Printed Circuit Board (PCB) 3;
side column mounting holes matched with the side columns 41 of the E-shaped magnetic core are formed in the front side and the rear side of the bottom plate mounting hole of the Printed Circuit Board (PCB) 3;
the insulating bottom plate 1 with the surface mounted inductor is assembled to the bottom plate placing hole;
the E-shaped magnetic core is fixed to the Printed Circuit Board (PCB)3 with a leg 41 passing through the leg seating hole and a leg 40 axially inserted into the inner ring of the inductor winding 2.
Preferably, the magnetic core 4 is formed by buckling two E-shaped magnetic cores.
Preferably, the magnetic core 4 is formed by combining an E-type magnetic core and an I-type magnetic core.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. A surface-mounted inductor is characterized by comprising an insulating base plate (1) and an inductor winding (2);
the inductance winding (2) is formed by winding a flat conducting wire for a plurality of turns;
the width of the flat wire is larger than the thickness of the flat wire;
the thickness direction of the flat wire is in the axial direction of the inductance winding, and the width direction of the flat wire is in the radial direction of the inductance winding;
the insulating bottom plate (1) is provided with a first conductive pin (11) and a second conductive pin (12);
two ends of the flat wire are respectively and electrically connected to a first conductive pin (11) and a second conductive pin (12) of the insulating bottom plate (1);
the axis of the inductance winding (2) is perpendicular to the insulating bottom plate (1);
and a circular through hole (10) is formed in the middle of the insulating base plate (1) corresponding to the inner ring of the inductance winding (2).
2. The surface mount inductor according to claim 1,
the insulating bottom plate (1) is also provided with a third pin (13);
the first conductive pin (11) and the second conductive pin (12) are arranged on the left side of the circular through hole (10), and the third pin (13) is arranged on the right side of the circular through hole (10).
3. The surface mount inductor according to claim 1,
and a flat lead at one end of the inductance winding (2) is flatly attached to the insulating base plate (1).
4. The surface mount inductor according to claim 1,
the width of the flat wire is 2-15 times of the thickness of the flat wire.
5. The surface mount inductor according to claim 1,
the inductance winding (2) is formed by winding 3-10 circles of flat conducting wires.
6. The surface mount inductor according to claim 1,
the flat lead is made of copper.
7. The surface mount inductor according to claim 1,
the insulating bottom plate (1) is made of plastic.
8. The surface mount inductor according to claim 1,
the inductance winding (2) and the insulation base plate (1) are fixed together through glue dispensing.
9. The surface mount inductor according to claim 1,
the first conductive pin (11) is formed by bending one end of the flat wire and then fixing the bent end on the insulating bottom plate (1);
the second conductive pins (12) are formed by bending the other end of the flat wire and then fixing the bent flat wire on the insulating base plate (1).
10. A circuit board comprising a surface mount inductor according to any of claims 1 to 9, further comprising a printed circuit board (3), a magnetic core (4);
said core (4) comprises an E-shaped core;
the printed circuit board (3) is provided with a bottom plate placing hole matched with the insulating bottom plate (1);
side column mounting holes matched with the side columns (41) of the E-shaped magnetic core are formed in the front side and the rear side of the bottom plate mounting hole of the printed circuit board (3);
the insulating bottom plate (1) with the surface mounted with the inductor is assembled to the bottom plate placing hole;
the E-shaped magnetic core is fixed to the printed circuit board (3), a side column (41) of the E-shaped magnetic core penetrates through the side column placement hole, and a column (40) of the E-shaped magnetic core is inserted into the inner ring of the inductance winding (2) along the axial direction.
11. The circuit board of claim 10,
the magnetic core (4) is formed by buckling two E-shaped magnetic cores.
12. The circuit board of claim 10,
the magnetic core (4) is formed by combining an E-shaped magnetic core and an I-shaped magnetic core.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021205870181 | 2021-03-23 | ||
| CN202120587018 | 2021-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215342247U true CN215342247U (en) | 2021-12-28 |
Family
ID=79561082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121409626.XU Active CN215342247U (en) | 2021-03-23 | 2021-06-24 | Surface-mounted inductor and circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215342247U (en) |
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2021
- 2021-06-24 CN CN202121409626.XU patent/CN215342247U/en active Active
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