CN210743752U - Power inductor for reducing alternating current loss - Google Patents
Power inductor for reducing alternating current loss Download PDFInfo
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- CN210743752U CN210743752U CN201922328969.2U CN201922328969U CN210743752U CN 210743752 U CN210743752 U CN 210743752U CN 201922328969 U CN201922328969 U CN 201922328969U CN 210743752 U CN210743752 U CN 210743752U
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Abstract
The utility model discloses a power inductance for reducing AC loss, which comprises a first EC type magnetic core, a second EC type magnetic core and a winding type coil arranged between the first EC type magnetic core and the second EC type magnetic core, wherein the middle parts of the first EC type magnetic core and the second EC type magnetic core are respectively provided with an annular containing notch, the winding type coil and the containing notch are arranged in a concentric circle way, an annular first air layer is arranged between the inner diameter of the winding type coil and the inner diameter of the containing notch, an annular second air layer is arranged between the outer diameter of the winding type coil and the outer diameter of the containing notch, the concentric circle between the winding type coil and the containing notch is ensured by an external jig, the inductance value precision of the inductance is ensured, and the magnetic field generated by the winding type coil and the magnetic field generated by the EC type magnetic core can not generate the coupling phenomenon when the AC is introduced, reduces the AC loss and has the advantages of simple, stable and reliable structure.
Description
Technical Field
The utility model relates to an inductance especially relates to a reduce power inductance of alternating current loss.
Background
The inductor is an element which can convert electric energy into magnetic energy to be stored, the inductor can block the change of current, and if the inductor is in a state that no current passes through the inductor, the inductor tries to block the current from flowing through the inductor when a circuit is switched on; if the inductor is in a current passing state, the inductor will try to keep the current unchanged when the circuit is opened.
In the prior art, the inductor respectively comprises two EC-type magnetic cores and a winding-type coil arranged between the two EC-type magnetic cores, wherein annular accommodating grooves are formed in the two EC-type magnetic cores, the matching of the small circular diameter of the accommodating groove and the inner diameter of the winding-type coil and the matching of the large circular diameter of the accommodating groove and the outer diameter of the winding-type coil are both tight, the effect of positioning the winding-type coil is achieved, the concentricity of the winding-type coil and the accommodating groove is ensured, and the inductance value error of the inductor is controlled within a certain range, although the design is convenient for manual assembly and assembly, when alternating current is introduced into the inductor, the tight matching between the winding-type coil and the EC-type magnetic cores can cause the magnetic field generated by the EC-type magnetic cores to have the phenomenon of coupling at the matching position, and the technical problem of high inductance loss exists, in addition, in the high-speed development, the manual assembly efficiency is too low, and the efficient economic requirement is not met, so the research and development thought of the product should not be bound by the manual assembly, and how to facilitate efficient automatic production operation should be considered.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned defect among the prior art, provide a simple structure reliable and stable, be favorable to the power inductance that can reduce the alternating current loss of automated production operation.
In order to achieve the above object, the utility model provides a reduce power inductance of alternating current loss, including first EC type magnetic core and second EC type magnetic core to and install the winding type coil between first EC type magnetic core and second EC type magnetic core, annular holding groove has been opened respectively at the middle part of first EC type magnetic core and second EC type magnetic core, some of winding type coil is installed in the holding groove of first EC type magnetic core, and another part is installed in the holding groove of second EC type magnetic core, winding type coil and holding groove set up for concentric circles, be provided with annular first air bed between the internal diameter of winding type coil and the internal diameter of holding groove, be provided with annular second air bed between the external diameter of winding type coil and the external diameter of holding groove.
Preferably, the difference between the outer and inner diameters of the first air layer is 3 mm.
Preferably, the difference between the outer and inner diameters of the second air layer is 3 mm.
Preferably, the first EC type magnetic core is an air-gap-free magnetic core, and the second EC type magnetic core is an air-gap-containing magnetic core.
Preferably, the depth of the receiving notch is half of the height of the winding type coil.
Preferably, the bottom surface of the receiving slot is coated with epoxy resin.
Preferably, the end surfaces of the first EC type core and the second EC type core, which are bonded to each other, are coated with epoxy resin, respectively.
Preferably, the winding-type coil includes a first terminal and a second terminal.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model is provided with a first EC type magnetic core, a second EC type magnetic core and a winding type coil arranged between the first EC type magnetic core and the second EC type magnetic core, the middle parts of the first EC-type magnetic core and the second EC-type magnetic core are respectively provided with an annular accommodating notch, an annular first air layer is arranged between the inner diameter of the winding type coil and the inner diameter of the accommodating notch, an annular second air layer is arranged between the outer diameter of the winding type coil and the outer diameter of the accommodating notch, the concentric circle error between the winding type coil and the accommodating notch is ensured through an external jig, the inductance value precision of the inductor is ensured, because the first air layer and the second air layer are arranged, the magnetic field generated by the winding type coil and the magnetic field generated by the EC type magnetic core can not be coupled when alternating current is introduced, the alternating current loss is reduced, and the magnetic-field-free electromagnetic valve has the advantages of simple, stable and reliable structure and contribution to automatic production operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a power inductor for reducing ac loss according to the present invention;
fig. 2 is a schematic plan view of a power inductor for reducing ac loss according to the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
fig. 4 is a first exploded view of a power inductor for reducing ac losses according to the present invention;
fig. 5 is a second exploded view of the power inductor for reducing ac loss according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 5, the present invention provides a power inductor with reduced ac loss, which includes a first EC type magnetic core 1 and a second EC type magnetic core 2, and a winding type coil 3 disposed between the first EC type core 1 and the second EC type core 2, the middle parts of the first EC-type magnetic core 1 and the second EC-type magnetic core 2 are respectively provided with an annular accommodating notch 11, one part of the winding-type coil 3 is fitted in the accommodation notch 11 of the first EC-type core 1, the other part is fitted in the accommodation notch 11 of the second EC-type core 2, the winding type coil 3 and the accommodating notch 11 are arranged in a concentric circle, an annular first air layer 4 is arranged between the inner diameter of the winding type coil 3 and the inner diameter of the accommodating notch 11, an annular second air layer 5 is provided between the outer diameter of the winding-type coil 3 and the outer diameter of the accommodation notch 11.
Specifically, first EC type magnetic core 1 is the magnetic core without air gap, and second EC type magnetic core 2 is the magnetic core with air gap, winding type coil 3 includes first terminal 31 and second terminal 32, guarantees the concentric circles between winding type coil 3 and holding notch 11 through the outside tool, ensures the inductance value precision of inductance, owing to set up first air bed 4 and second air bed 5 for the magnetic field that winding type coil 3 produced and the magnetic field that EC type magnetic core produced can not appear the phenomenon of coupling when letting in alternating current, has reduced alternating current loss.
It was found through a lot of experiments that when the difference between the outer and inner diameters of the first air layer 4 was 3mm and the difference between the outer and inner diameters of the second air layer 5 was 3mm, the ac loss of the inductor was low.
The degree of depth of holding notch 11 is the half of the height of coiling type coil 3 for half of coiling type coil 3 is installed in the holding notch 11 of first EC type magnetic core 1, and the other half is installed in the holding notch 11 of second EC type magnetic core 2, makes when letting in alternating current on coiling type coil 3, and the magnetic field that coiling type coil 3 produced can the symmetric distribution in the middle part of the produced magnetic field of EC type magnetic core, makes the work of inductance more reliable and more stable.
The bottom surface 111 of the accommodating notch 11 is coated with epoxy resin, one end face of the winding type coil 3 is bonded to the accommodating notch 11 of the first EC type magnetic core 1 through the epoxy resin, and the other end face of the winding type coil is bonded to the accommodating notch 11 of the second EC type magnetic core 2 through the epoxy resin, so that the first EC type magnetic core 1, the winding type coil 3 and the second EC type magnetic core 2 are bonded into a whole, and the bonding mode is reliable and stable.
The end faces 12, to which the first EC-type magnetic core 1 and the second EC-type magnetic core 2 are attached, are coated with epoxy resin respectively, and the first EC-type magnetic core 1 and the second EC-type magnetic core 2 are bonded through the epoxy resin on the end faces 12, so that the first EC-type magnetic core 1 and the second EC-type magnetic core 2 are bonded into a whole, and the reliability and the stability of the inductor are further ensured.
To sum up, the utility model discloses can reduce the alternating current loss, have simple structure reliable and stable, be favorable to the advantage of automated production operation.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (8)
1. A power inductor for reducing alternating current loss comprises a first EC type magnetic core (1) and a second EC type magnetic core (2), and a winding type coil (3) provided between the first EC type core (1) and the second EC type core (2), characterized in that the middle parts of the first EC-type magnetic core (1) and the second EC-type magnetic core (2) are respectively provided with an annular containing notch (11), a part of the winding type coil (3) is mounted in the receiving notch (11) of the first EC type core (1), the other part is arranged in the containing notch (11) of the second EC-type magnetic core (2), the winding type coil (3) and the containing notch (11) are arranged in a concentric circle, an annular first air layer (4) is arranged between the inner diameter of the winding type coil (3) and the inner diameter of the accommodating notch (11), an annular second air layer (5) is arranged between the outer diameter of the winding type coil (3) and the outer diameter of the accommodating notch (11).
2. A power inductor with reduced ac losses according to claim 1, characterized in that the difference between the outer and inner circular diameters of the first air layer (4) is 3 mm.
3. A power inductor with reduced ac losses according to claim 1, characterized in that the difference between the outer and inner circular diameters of the second air layer (5) is 3 mm.
4. A power inductor with reduced ac losses according to claim 1, characterized in that the first EC-type core (1) is an air-gap-free core and the second EC-type core (2) is an air-gap-core.
5. A power inductor with reduced ac losses according to claim 1, characterized in that the depth of the receiving slot (11) is half the height of the winding coil (3).
6. A power inductor with reduced ac losses according to claim 1, characterized in that the bottom surface (111) of the receiving slot (11) is coated with epoxy.
7. The power inductor for reducing alternating current loss according to claim 1, wherein the attached end faces (12) of the first EC-type magnetic core (1) and the second EC-type magnetic core (2) are respectively coated with epoxy resin.
8. A power inductor with reduced ac losses according to claim 1, characterized in that the winding type coil (3) comprises a first terminal (31) and a second terminal (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922328969.2U CN210743752U (en) | 2019-12-23 | 2019-12-23 | Power inductor for reducing alternating current loss |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922328969.2U CN210743752U (en) | 2019-12-23 | 2019-12-23 | Power inductor for reducing alternating current loss |
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| CN210743752U true CN210743752U (en) | 2020-06-12 |
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| CN201922328969.2U Active CN210743752U (en) | 2019-12-23 | 2019-12-23 | Power inductor for reducing alternating current loss |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113223824A (en) * | 2021-04-29 | 2021-08-06 | 东莞沛波电子有限公司 | High-capacity power inductor convenient for automatic production |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113223824A (en) * | 2021-04-29 | 2021-08-06 | 东莞沛波电子有限公司 | High-capacity power inductor convenient for automatic production |
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