CN215644025U

CN215644025U - Integrated magnetic device

Info

Publication number: CN215644025U
Application number: CN202120826198.4U
Authority: CN
Inventors: 叶欣; 刘海志; 瞿清
Original assignee: Inventronics Hangzhou Co Ltd
Current assignee: Inventronics Hangzhou Co Ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2022-01-25
Anticipated expiration: 2031-04-21

Abstract

The utility model discloses an integrated magnetic device, which comprises a first framework and a second framework, wherein the first framework and the second framework are provided with through holes which are integrally communicated; side magnetic cores fixed through the through holes are arranged on the outer side of the first framework and the outer side of the second framework, and a middle magnetic core is arranged between the first framework and the second framework; the limit magnetic core is E type magnetic core, at least one side of middle magnetic core be equipped with the relative side post of limit magnetic core and middle post. The integrated magnetic device improves the consistency of the magnetic saturation points of the integrated magnetic devices and the magnetic density during magnetic saturation, thereby improving the performance of the integrated magnetic device.

Description

Integrated magnetic device

Technical Field

The utility model relates to the field of magnetic devices, in particular to an integrated magnetic device.

Background

Two-stage circuits are commonly used in a driving power supply, a more commonly used two-stage circuit topology structure is a combination of a non-isolated DC-DC circuit and an isolated DC-DC circuit, for example, circuit structures such as Boost + LLC, Boost + Flyback, Flyback + Buck and the like, each stage of circuit topology structure is provided with at least one magnetic device, for example, an inductor of the non-isolated circuit and a transformer of the isolated circuit, and therefore, two or more independent magnetic devices are arranged in the traditional driving power supply. Can reduce the processing cost through setting up a plurality of magnetism device integratively, magnetism device after the integration includes the limit magnetic core of middle board magnetic core and both sides, because the structural feature of the limit magnetic core of middle magnetic core and both sides leads to middle magnetic core to produce the magnetic saturation easily, and the magnetic saturation point uniformity of different magnetism devices is lower, is unfavorable for the unified production of product.

Therefore, how to improve the consistency of the magnetic saturation point of the integrated magnetic device becomes a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an integrated magnetic device, which improves the consistency of magnetic saturation points and magnetic density during magnetic saturation of a plurality of integrated magnetic devices and improves the performance of the integrated magnetic device.

In order to achieve the above object, the present invention provides an integrated magnetic device, comprising a first frame and a second frame, wherein the first frame and the second frame are provided with through holes which are integrally communicated; side magnetic cores fixed through the through holes are arranged on the outer side of the first framework and the outer side of the second framework, and a middle magnetic core is arranged between the first framework and the second framework; the limit magnetic core is E type magnetic core, at least one side of middle magnetic core be equipped with the relative side post of limit magnetic core and middle post.

Optionally, the both sides of first skeleton with the both sides of second skeleton all are equipped with keeps off the platform, the first skeleton outside with the second skeleton outside keep off the platform below and be equipped with the stitch that is used for connecting the winding wire, first skeleton with the second skeleton passes through the two inboards keep off the platform and can dismantle the connection.

Optionally, the baffle table side wall on the inner side of the first framework is provided with a protruding part, and the baffle table side wall on the inner side of the second framework is provided with a groove matched with the protruding part in an inserted manner.

Optionally, middle magnetic core is E type magnetic core, middle magnetic core orientation first skeleton the limit magnetic core sets up, the side post of middle magnetic core with on the first skeleton the side post of limit magnetic core offsets.

Optionally, the middle magnetic core is shaped like a Chinese character 'wang', and the side columns of the middle magnetic core are respectively abutted to the side columns of the side magnetic cores on two sides.

Optionally, retaining walls are arranged on the two sides of the first framework and the two sides of the second framework, and the retaining walls are arranged above one side of the blocking table.

Optionally, isolation retaining walls are arranged between the retaining walls on two sides of the second framework.

Optionally, the middle column of the middle magnetic core is arranged in a gap with the middle column of the side magnetic core.

Optionally, the lower surfaces of the blocking platforms on the inner sides of the first framework and the second framework are provided with lead grooves.

Optionally, an energy storage inductor winding is wound between the retaining walls of the first framework, and a transformer winding is wound between the retaining walls and the isolation retaining walls of the second framework.

Compared with the background technology, the integrated magnetic device provided by the utility model integrates the first framework and the second framework, the side magnetic cores are arranged on the two sides of the first framework and the second framework, and the middle magnetic core is arranged between the first framework and the second framework, so that the integration of the magnetic device is realized. Meanwhile, by improving the structure of the middle magnetic core, the side column and the middle column of the middle magnetic core are matched with the side column and the middle column of the side magnetic core at least on one side, so that a magnetic loop formed by the middle magnetic core and the side magnetic core at least on one side is optimized, the consistency of a magnetic saturation point of the integrated magnetic device is improved, the magnetic density of the magnetic device during magnetic saturation is increased, and the performance of the integrated magnetic device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is an exploded view of an integrated magnetic device provided by an embodiment of the present invention;

FIG. 2 is a schematic view of the assembly of the first frame and the second frame;

FIG. 3 is a diagram illustrating the combination of a center core and an edge core of an integrated magnetic device according to an embodiment of the present invention;

fig. 4 is a diagram illustrating a combination of a middle core and an edge core of an integrated magnetic device according to another embodiment of the present invention.

Wherein:

1-a first framework, 2-a second framework, 3-a side magnetic core, 4-a middle magnetic core, 5-a baffle table, 6-a retaining wall, 7-an isolation retaining wall, 8-a pin, 9-a side column, 10-a middle column, 11-a bulge, 12-a groove and 13-a lead groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 4, fig. 1 is an exploded view of an integrated magnetic device according to an embodiment of the present invention, fig. 2 is an assembly diagram of a first frame and a second frame, fig. 3 is a matching diagram of a middle core and a side core of an integrated magnetic device according to an embodiment of the present invention, and fig. 4 is a matching diagram of a middle core and a side core of an integrated magnetic device according to another embodiment of the present invention.

The integrated magnetic device provided by the utility model comprises a first framework 1, a second framework 2, a side magnetic core 3 and a middle magnetic core 4. Connect integrative realization magnetic device with the help of first skeleton 1 and second skeleton 2 and integrate, first skeleton 1 and second skeleton 2 set up integrative through-hole that link up, and two sets of limit magnetic cores 3 are E type magnetic cores, through the middle post 10 with the cooperation of through-hole install respectively in the outside of first skeleton 1 and second skeleton 2, middle magnetic core 4 then installs between first skeleton 1 and second skeleton 2. By improving the structure of the middle magnetic core 4, the side columns 9 and the middle column 10 of the middle magnetic core 4 are matched with at least the side columns 9 and the middle column 10 of the side magnetic core 3 on one side, so that a magnetic loop formed by the middle magnetic core 4 and at least one side magnetic core 3 is optimized, the consistency of the magnetic saturation point of the integrated magnetic device is improved, the magnetic density of the magnetic device during magnetic saturation is increased, and the performance of the integrated magnetic device is improved.

In the specific embodiment provided by the present invention, as shown in fig. 1 and 3, the main body portions of the first frame 1 and the second frame 2 are provided with through holes, and the side magnetic cores 3 are fixed by the through holes; the bottom of 1 both sides of first skeleton and the bottom of 2 both sides of second skeleton all set up and keep off platform 5, and limit magnetic core 3 and middle magnetic core 4 set up in the top that keeps off platform 5. And a pin 8 is further arranged below the blocking table 5, which is close to the outer side, of the first framework 1 and the second framework 2, and the pin 8 is used for leading out a lead of the winding coil. In this embodiment, the edge-to-edge magnetic core is an E-shaped magnetic core, the middle column 10 of the edge magnetic core 3 is inserted into the through hole, and the side column 9 clamps and fixes the main body portions of the first framework 1 and the second framework 2. Side post 9 and the middle post 10 of middle magnetic core 4 set up towards one side, also adopt E type magnetic core for middle magnetic core 4 promptly, and middle post 10 and the side post 9 of middle magnetic core 4 all set up towards the limit magnetic core 3 of first skeleton 1. So that the middle column 10 of the side magnetic core 3 on the first framework 1 is opposite to the middle column 10 of the middle magnetic core 4, and the side column 9 of the side magnetic core 3 on the first framework 1 is abutted against the side column 9 of the middle magnetic core 4.

Preferably, the length of the middle column 10 is set to be smaller than that of the side column 9, that is, the middle column 10 of the side core 3 and the middle column 10 of the middle core 4 on the first bobbin 1 are spaced apart by a predetermined distance. The magnetic density of a magnetic loop formed by the mutual matching of the side magnetic core 3 and the middle magnetic core 4 on the first framework 1 is higher when the magnetic loop is in magnetic saturation, and the consistency of magnetic saturation points in a plurality of magnetic devices is also higher. Obviously, the side legs 9 and the middle leg 10 of the middle core 4 may be disposed not only toward the side core 3 of the first bobbin 1 but also toward the side core 3 on the second bobbin 2 as needed.

Referring to fig. 2, the first frame 1 and the second frame 2 are detachably assembled to facilitate the installation and fixation of the side magnetic cores 3 and the middle magnetic core 4. The side wall of one of the baffle table 5 at the inner side of the first framework 1 and the baffle table 5 at the inner side of the second framework 2 is provided with a convex part 11, and the other is provided with a groove 12 matched with the convex part 11; of course, it is also possible to stagger the protrusions 11 and the grooves 12 on the first bobbin 1 and the second bobbin 2. As shown in fig. 2, a protrusion 11 is disposed in the center of the sidewall of the inner side baffle 5 of the first framework 1, grooves 12 are disposed on both sides of the sidewall, the corresponding groove 12 is disposed in the center of the sidewall of the inner side baffle 5 of the second framework 2, and the protrusion 11 is disposed on both sides of the sidewall. In order to improve the fixing effect, the protruding part 11 may be configured as a multi-step cylindrical boss structure, and the shape of the groove 12 is always matched with the shape of the protruding part 11.

In another embodiment of the present invention, both sides of the middle core 4 are provided with the side legs 9 and the middle leg 10 opposite to the side core 3. As shown in fig. 1 and 4, the middle magnetic core 4 is "king" shaped, that is, the first side of the middle magnetic core 4 is provided with a side pillar 9 abutting against the side pillar 9 of the side magnetic core 3 on the first framework 1, and the first side of the middle magnetic core 4 is further provided with a middle pillar 10 oppositely arranged with a preset gap or without a gap from the middle pillar 10 of the side magnetic core 3 on the first framework 1; the second side of the middle magnetic core 4 is provided with a side column 9 which is abutted against the side column 9 of the side magnetic core 3 on the second framework 2, and the second side of the middle magnetic core 4 is also provided with a middle column 10 which is oppositely arranged with a preset gap or no gap with the middle column 10 of the side magnetic core 3 on the second framework 2. Through the setting of the middle magnetic core 4 of "king" style of calligraphy, form the cooperation with the limit magnetic core 3 of both sides, improved the return circuit that arbitrary limit magnetic core 3 and middle magnetic core 4 formed, improved the uniformity of integrated magnetism device magnetism saturation point.

In the above embodiment, the first bobbin 1 and the second bobbin 2 are provided with not only the blocking platform 5 but also the retaining wall 6 for limiting the winding coil, the retaining wall 6 is located at one side of the blocking platform 5 close to the upper side of the bobbin body, the winding coil is wound on the bobbin body of the first bobbin 1 and the second bobbin 2, and the winding wire is led out through the stitch 8 below the blocking platform 5. Furthermore, an energy storage inductor winding can be wound between the pair of retaining walls 6 of the first framework 1, and a transformer winding can be wound around the pair of retaining walls 6 of the second framework 2.

One or a pair of isolation retaining walls 7 are further arranged between the pair of retaining walls 6 of the second framework 2, and the isolation retaining walls 7 isolate the second framework 2 to form two winding areas which can be used for winding a primary winding and a secondary winding of a transformer winding. The size of the leakage inductance is adjusted by changing the thickness of one retaining wall 7 or the distance between a pair of isolation retaining walls 7, so that when the integrated magnetic device is used for an LLC circuit, the resonance inductance of the LLC circuit is replaced by the leakage inductance, and the magnetic integration of the isolation transformer and the resonance inductance is realized.

The integrated magnetic device can be a magnetic device integrating an energy storage inductor of a non-isolated DC/DC circuit and a transformer of the isolated DC/DC circuit; the magnetic device can also be a magnetic device integrating the energy storage inductor of the two-stage DC/DC circuit. Corresponding winding coils can be wound on the framework main bodies of the first framework 1 and the second framework 2 according to use requirements, and for example, the energy storage inductor adopting a non-isolated DC/DC circuit at least comprises a main winding and a current detection winding; when the isolated DC/DC circuit is an LLC circuit, one or a pair of isolation retaining walls 7 is/are arranged, the thickness of one retaining wall 7 or the distance between the pair of retaining walls 7 is adjusted, leakage inductance is adjusted to replace resonant inductance, and magnetic integration of the isolation transformer and the resonant inductance is realized.

As a preferred embodiment of the integrated magnetic device, when the first bobbin 1 and the second bobbin 2 are both used for winding an energy storage inductor in a DC/DC circuit, such as a Boost + Flyback circuit, the middle magnetic core 4 is shaped like a "king", and two side magnetic cores 3 outside the first bobbin 1 and the second bobbin 2 and the middle "king" magnetic core respectively form a magnetic loop of the Boost inductor and the Flyback inductor.

In the above embodiment, when the winding coil of the second bobbin 2 is a transformer winding, the pins 8 of the primary winding and the secondary winding of the transformer should be arranged on different sides according to the safety requirements, that is, the pins 8 should be arranged below the baffle table 5 on the inner side of the second bobbin 2. As a preferred alternative embodiment, in the present application, the lead groove 13 is formed below the blocking table 5 inside the first framework 1 and the second framework 2, and the winding between the isolation retaining wall 7 and the retaining wall 6 inside the transformer winding in the second framework 2 is led to the stitch 8 below the blocking table 5 outside the first framework 1 through the lead groove 13, so that not only is the processing of the first framework 1 and the second framework 2 facilitated, but also the assembly efficiency of the first framework 1 and the second framework 2 is improved, and the stitch 8 below the blocking table 5 inside is prevented from being arranged below the blocking table 5 inside and damaged in the assembly process.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The integrated magnetic device provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. An integrated magnetic device is characterized by comprising a first framework and a second framework, wherein the first framework and the second framework are provided with through holes which are integrally communicated; side magnetic cores fixed through the through holes are arranged on the outer side of the first framework and the outer side of the second framework, and a middle magnetic core is arranged between the first framework and the second framework; the limit magnetic core is E type magnetic core, at least one side of middle magnetic core be equipped with the relative side post of limit magnetic core and middle post.

2. The integrated magnetic device according to claim 1, wherein two sides of the first frame and two sides of the second frame are provided with a baffle table, a pin for connecting a winding wire is arranged below the baffle table outside the first frame and the second frame, and the first frame and the second frame are detachably connected through the baffle table inside the first frame and the second frame.

3. The integrated magnetic device according to claim 2, wherein the sidewall of the baffle table inside the first frame is provided with a protrusion, and the sidewall of the baffle table inside the second frame is provided with a groove fitted with the protrusion.

4. The integrated magnetic device of claim 2, wherein the middle core is an E-core, the middle core is disposed toward the side core of the first bobbin, and the side legs of the middle core abut the side legs of the side core on the first bobbin.

5. The integrated magnetic device according to claim 2, wherein the middle magnetic core is "king" shaped, and the side legs of the middle magnetic core are respectively abutted against the side legs of the side magnetic cores at two sides.

6. The integrated magnetic device according to any one of claims 2 to 5, wherein retaining walls are disposed on both sides of the first framework and both sides of the second framework, and the retaining walls are disposed above one side of the blocking platform.

7. The integrated magnetic device of claim 6, wherein an isolation wall is disposed between the walls on both sides of the second frame.

8. The integrated magnetic device of claim 4 or 5, wherein the middle leg of the middle core is disposed in a gap with the middle leg of the side core.

9. The integrated magnetic device of claim 6, wherein the lower surfaces of the blocking platforms at the inner sides of the first and second frameworks are provided with lead grooves.

10. The integrated magnetic device according to claim 7, wherein an energy storage inductor winding is wound between a pair of said retaining walls of said first framework, and a transformer winding is wound between said retaining wall and said isolation retaining wall of said second framework.