CN214410946U - Laminated inductor - Google Patents

Laminated inductor Download PDF

Info

Publication number
CN214410946U
CN214410946U CN202120130747.4U CN202120130747U CN214410946U CN 214410946 U CN214410946 U CN 214410946U CN 202120130747 U CN202120130747 U CN 202120130747U CN 214410946 U CN214410946 U CN 214410946U
Authority
CN
China
Prior art keywords
coil
core
cap
inductor
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202120130747.4U
Other languages
Chinese (zh)
Inventor
朱秀美
马俊思
李强
宋毅华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Fenghua Advanced Tech Holding Co Ltd
Original Assignee
Guangdong Fenghua Advanced Tech Holding Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Fenghua Advanced Tech Holding Co Ltd filed Critical Guangdong Fenghua Advanced Tech Holding Co Ltd
Priority to CN202120130747.4U priority Critical patent/CN214410946U/en
Application granted granted Critical
Publication of CN214410946U publication Critical patent/CN214410946U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a laminated inductor, which comprises a core body unit, wherein the core body unit comprises a first core body and a second core body which are sequentially overlapped from bottom to top, and the two ends of the core body unit are respectively provided with a first end cap and a second end cap so as to connect the first core body and the second core body; the first core comprises a first coil which rises spirally, a first current input end is arranged at the lower end of the first coil, a first current output end is arranged at the upper end of the first coil, and the first current input end and the first current output end are electrically connected with the first end cap and the second end cap in a one-to-one correspondence manner; the second core body comprises a second coil which descends in a spiral mode, a second current output end is arranged at the lower end of the second coil, a second current input end is arranged at the upper end of the second coil, and the second current input end and the second current output end are electrically connected to the first sealing end and the second sealing end in a one-to-one correspondence mode; the laminated inductor is provided with the first coil and the second coil which are connected in parallel, so that the overall resistance value of the inductance coil can be effectively reduced, the Q value of the inductor is improved, and a better filtering effect is achieved.

Description

Laminated inductor
Technical Field
The utility model relates to an electron device technical field especially relates to a lamination inductor.
Background
Some electronic devices such as mobile phones often have inductors to implement the filtering function, but these inductors are a single coil, and the resistance value of the inductor is large, and the Q value of the inductor is low (the Q value is the ratio of the inductance presented by the inductor when the inductor works under an ac voltage of a certain frequency and the resistance of the equivalent loss, which is the quality factor of the inductor), so that the quality of the inductor is not high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: a multilayer inductor having a higher Q value is provided.
In order to achieve the above object, the present invention provides a laminated inductor, which includes a core unit, wherein the core unit includes a first core and a second core stacked in sequence from bottom to top, and two ends of the core unit are respectively provided with a first end cap and a second end cap for connecting the first core and the second core; the first core comprises a first coil which rises spirally, a first current input end is arranged at the lower end of the first coil, a first current output end is arranged at the upper end of the first coil, and the first current input end and the first current output end are electrically connected to the first end cap and the second end cap in a one-to-one correspondence manner; the second core body comprises a second coil which is spirally descended, a second current output end is arranged at the lower end of the second coil, a second current input end is arranged at the upper end of the second coil, and the second current input end and the second current output end are electrically connected to the first end cap and the second end cap in a one-to-one correspondence mode.
Preferably, a winding direction of the first coil from the upper end to the lower end of the first coil is opposite to a winding direction of the second coil from the upper end to the lower end of the second coil from a top view of the second coil.
Preferably, the first core includes a plurality of first magnetic layers stacked in sequence from bottom to top, each of the first magnetic layers has a first conductor, and the first conductors are connected in sequence to define the first coil; the second core body comprises a plurality of second magnetic layers which are stacked in sequence from top to bottom, each second magnetic layer is provided with a second conductor, and the second conductors are connected in sequence to form the second coil.
Preferably, the first conductor is screen-printed on the first magnet layer, and the second conductor is screen-printed on the second magnet layer.
Preferably, the first coil and the second coil are arranged in a mirror image.
Preferably, the first coil and the second coil are both made of metallic silver.
Preferably, a first insulating layer is provided between the first core and the second core.
Preferably, the first insulating layer is made of ceramic.
Preferably, the first end cap and the second end cap are made of metallic silver.
Preferably, the periphery of the core unit is wrapped by a second insulating layer, and the material of the second insulating layer comprises ceramic.
The utility model discloses laminated inductor, compared with the prior art, its beneficial effect lies in:
the laminated inductor is connected with a circuit, a first end cap is used as an input end of current of the laminated inductor, a second end cap is used as an output end of the current, the current flows into a first coil and a second coil through the first end cap respectively through a first current input end and a second current input end, then flows into the second end cap from the first current output end and the second current output end, and then returns to the circuit, the first coil and the second coil can generate inductive reactance after being electrified, and the change of the current inside the first coil and the second coil can be hindered; the laminated inductor is provided with the first coil and the second coil which are connected in parallel, so that the overall resistance value of the inductance coil can be effectively reduced, and the Q value of the inductor is improved, thereby improving the quality of the inductor and leading the laminated inductor to have better filtering effect.
Drawings
Fig. 1 is a schematic diagram of a multilayer inductor according to an embodiment of the present invention;
fig. 2 is an exploded view of a multilayer inductor according to an embodiment of the present invention;
in the figure, 1, a first core; 11. a first coil; 12. a first magnetic layer; 13. a first current input terminal; 14. a first current output terminal; 15. a first conductor; 2. a second core; 21. a second coil; 22. a second magnetic layer; 23. a second current input terminal; 24. a second current output terminal; 25. a second conductor; 3. a second insulating layer; 4. a first end cap; 5. a second end cap; 6. a core unit; 7. a first insulating layer.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "first", "second", and the like are used in the present invention to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
As shown in fig. 1-2, a multilayer inductor according to a preferred embodiment of the present invention includes a core unit 6, the core unit 6 includes a first core 1 and a second core 2 stacked in sequence from bottom to top, and a first end cap 4 and a second end cap 5 are respectively disposed at two ends of the core unit 6 to connect the first core 1 and the second core 2; the first core body 1 comprises a first coil 11 which rises spirally, a first current input end 13 is arranged at the lower end of the first coil 11, a first current output end 14 is arranged at the upper end of the first coil 11, and the first current input end 13 and the first current output end 14 are electrically connected to the first end cap 4 and the second end cap 5 in a one-to-one correspondence manner; the second core body 2 comprises a second coil 21 which is spirally descended, a second current output end 24 is arranged at the lower end of the second coil 21, a second current input end 23 is arranged at the upper end of the second coil 21, and the second current input end 23 and the second current output end 24 are electrically connected to the first end cap 4 and the second end cap 5 in a one-to-one correspondence manner.
Based on the above technical solution, the multilayer inductor is connected to a circuit, the first terminal 4 is used as an input terminal of a current of the multilayer inductor, the second terminal 5 is used as an output terminal of the current, the current flows into the first coil 11 and the second coil 21 through the first terminal 4 via the first current input terminal 13 and the second current input terminal 23, respectively, then flows into the second terminal 5 from the first current output terminal 14 and the second current output terminal 24, and then returns to the circuit, the first coil 11 and the second coil 21 generate an inductive reactance after being electrified, so as to hinder the change of the current therein; the laminated inductor is provided with the first coil 11 and the second coil 21 which are connected in parallel, so that the overall resistance value of the inductance coil can be effectively reduced, and the Q value of the inductor is improved, thereby improving the quality of the inductor, reducing the magnetic loss of the inductor and enabling the laminated inductor to have a better filtering effect.
Specifically, the Q value of the inductor is calculated by the formula: q ═ wL/R, where w is the supply frequency at which the circuit resonates, L is the inductance, and R is the resistance; therefore, the two coils are connected in parallel, so that the overall resistance value of the inductor is reduced, and the Q value is increased; the Q value is a quality factor of the inductor and is a ratio of active power to total power of the inductor, and the larger the Q value is, the higher the efficiency of the inductor is and the smaller the magnetic loss is; while excessive Q will cause the circuit to resonate, in some radio devices, the resonance characteristic is often used to increase the amplitude of the weak signal. In addition, in the present embodiment, two coils are connected in parallel in a substrate, and compared with the original case where one coil is disposed in the substrate, the volume of the substrate is not increased, that is, the volume of the multilayer inductor is the same as the volume of the original inductor having only a single coil, so that the multilayer inductor can be connected to a circuit instead of the original inductor having a single coil without other adjustments.
Preferably, as viewed from the top view of the second coil 21, the winding direction of the first coil 11 from the upper end to the lower end thereof is opposite to the winding direction of the second coil 21 from the upper end to the lower end thereof, as shown in fig. 2 of the present embodiment, the winding direction of the upper end to the lower end of the first coil 11 is counterclockwise, the winding direction of the upper end to the lower end of the second coil 21 is clockwise, according to the right-hand screw rule, the magnetic field generated by the first coil 11 after being energized and the magnetic field generated by the second coil 21 after being energized can be superposed with each other, and at this time, the inductance of the first coil 11 or the second coil 21 is larger than that of the respective coil (the magnetic field becomes stronger, the inductance becomes larger), the Q value of the laminated inductor is higher (the Q value is the ratio of the inductive reactance of the inductor working under a certain alternating frequency voltage to the resistance of the equivalent loss of the inductor), the quality of the laminated inductor is better, and the laminated inductor has better filtering effect; specifically, the first core 1 of the present embodiment includes a plurality of first magnetic layers 12 stacked in sequence from bottom to top, each first magnetic layer 12 has a first conductor 15, the first conductors 15 are screen-printed on the first magnetic layers 12, and the plurality of first conductors 15 are connected in sequence to define the first coil 11; in this embodiment, the first magnet layer 12 located at the lowermost position is provided with a first current input terminal 13, and the first magnet layer 12 located at the uppermost position is provided with a first current output terminal 14; similarly, the second core 2 includes a plurality of second magnetic layers 22 stacked in sequence from top to bottom, each second magnetic layer 22 has a second conductor 25, the second conductors 25 are screen-printed on the second magnetic layers 22, the plurality of second conductors 25 are connected in sequence to define the second coil 21, the uppermost second magnetic layer 22 is provided with a second current input terminal 23, and the lowermost second magnetic layer 22 is provided with a second current output terminal 24.
Further, the first coil 11 and the second coil 21 are arranged in a mirror image manner, the resistance values of the first coil 11 and the second coil 21 are the same, magnetic fields generated by the first coil 11 and the second coil 21 when the power is supplied are in mirror image symmetry, and the magnetic fields in mirror image symmetry can be superposed with each other, so that the inductance of the first coil 11 and the inductance of the second coil 21 are increased.
In this embodiment, preferably, the first coil 11 and the second coil 21 are made of metallic silver, the first end cap 4 and the second end cap 5 are also made of metallic silver, and the metallic silver has good conductivity, so that when used as a coil, the resistance value of the coil can be reduced, the Q value of the coil can be improved, and when used as an end cap, the conductivity of the coil can be improved.
A first insulating layer 7 is arranged between the first core body 1 and the second core body 2, and the material of the first insulating layer 7 is preferably ceramic; the periphery of the core body unit 6 is also wrapped with a second insulating layer 3, the material of the second insulating layer 3 comprises ceramic, and one of the outer sides of the second insulating layer 3 is coated with a marking pattern such as a black square, which indicates that the outer side faces upwards, so that the laminated inductor can be conveniently installed.
The utility model discloses a working process does:
one of the outer sides of the second insulating layer 3 is coated with a logo pattern, which means that the outer side faces upward for mounting the multilayer inductor; the first end cap 4 is electrically connected to the input end of the current, the second end cap 5 is electrically connected to the output end of the current, the current flows through the first coil 11 and the second coil 21 through the first end cap 4 respectively, then flows out from the second end cap 5, and the first coil 11 and the second coil 21 are arranged in a mirror image mode, magnetic fields generated by the first coil 11 and the second coil 21 when the first end cap and the second end cap are electrified can be mutually superposed, so that the inductance (compared with the single coil) of the first coil 11 and the second coil 21 is larger, and after the first coil 11 and the second coil 21 are connected in parallel, the integral resistance value of the lamination inductor is reduced, finally, the Q value of the lamination inductor is increased, namely, the quality (the Q value is the quality factor of the inductor) of the lamination inductor is improved, and the lamination inductor has a better filtering effect.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims (10)

1. A laminated inductor is characterized by comprising a core unit, wherein the core unit comprises a first core and a second core which are sequentially laminated from bottom to top, and a first end cap and a second end cap are respectively arranged at two ends of the core unit so as to connect the first core and the second core;
the first core comprises a first coil which rises spirally, a first current input end is arranged at the lower end of the first coil, a first current output end is arranged at the upper end of the first coil, and the first current input end and the first current output end are electrically connected to the first end cap and the second end cap in a one-to-one correspondence manner;
the second core body comprises a second coil which is spirally descended, a second current output end is arranged at the lower end of the second coil, a second current input end is arranged at the upper end of the second coil, and the second current input end and the second current output end are electrically connected to the first end cap and the second end cap in a one-to-one correspondence mode.
2. The multilayer inductor according to claim 1, wherein a winding direction of the first coil from an upper end to a lower end thereof is opposite to a winding direction of the second coil from an upper end to a lower end thereof, as viewed from a top view of the second coil.
3. The multilayer inductor of claim 1, wherein the first core comprises a plurality of first magnetic layers stacked in sequence from bottom to top, each of the first magnetic layers having a first conductor, the plurality of first conductors being connected in sequence to define the first coil;
the second core body comprises a plurality of second magnetic layers which are stacked in sequence from top to bottom, each second magnetic layer is provided with a second conductor, and the second conductors are connected in sequence to form the second coil.
4. The multilayer inductor of claim 3, wherein the first conductor is screen printed on the first magnet layer and the second conductor is screen printed on the second magnet layer.
5. The multilayer inductor according to any one of claims 1-4, wherein the first coil and the second coil are arranged in mirror image.
6. The multilayer inductor of claim 1, wherein the first coil and the second coil are made of silver.
7. The multilayer inductor of claim 1, wherein a first insulating layer is disposed between the first core and the second core.
8. The multilayer inductor of claim 7, wherein the first insulating layer is made of ceramic.
9. The multilayer inductor of claim 1, wherein the first and second terminations are made of metallic silver.
10. The multilayer inductor of claim 1, wherein the core unit is wrapped around a second insulating layer, the second insulating layer comprising a ceramic.
CN202120130747.4U 2021-01-18 2021-01-18 Laminated inductor Active CN214410946U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120130747.4U CN214410946U (en) 2021-01-18 2021-01-18 Laminated inductor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120130747.4U CN214410946U (en) 2021-01-18 2021-01-18 Laminated inductor

Publications (1)

Publication Number Publication Date
CN214410946U true CN214410946U (en) 2021-10-15

Family

ID=78046147

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120130747.4U Active CN214410946U (en) 2021-01-18 2021-01-18 Laminated inductor

Country Status (1)

Country Link
CN (1) CN214410946U (en)

Similar Documents

Publication Publication Date Title
US20060214760A1 (en) Air core inductive element on printed circuit board for use in switching power conversion circuitries
WO2004055841A1 (en) Multiple choke coil and electronic equipment using the same
WO2008007705A1 (en) Layered inductor
CN105305996B (en) Combined electronical assembly and plate with the combined electronical assembly
TW495776B (en) Electronic device
KR20190004669A (en) Winding module, hybrid transformer, module and circuit for dc-dc power conversion
US2963669A (en) Air-core transformer
CN209418265U (en) A kind of inductor
CN214410946U (en) Laminated inductor
US20150130577A1 (en) Insulation planar inductive device and methods of manufacture and use
CN214279762U (en) Laminated inductor
JPH10335146A (en) Inductance element
US20220108823A1 (en) Inductor
KR101853129B1 (en) Multilayer power inductor
EP1782440A1 (en) Coil form for forming an inductive element
KR20180025592A (en) Coil component
CN111430133A (en) Half-turn structure of transformer coil and winding method thereof
CN207977198U (en) A kind of electronic transformer
CN109686539A (en) A kind of inductor
CN206921632U (en) A kind of magnetic bar type transformer
CN211879199U (en) Half-turn structure of transformer coil
CN215680348U (en) Space-saving oscillating inductor
CN207282250U (en) A kind of super thin inductive of modified form
CN214377944U (en) Differential-common mode inductor
CN216015047U (en) Thin film inductor and power conversion circuit

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant