CN217788161U

CN217788161U - Unilateral pin surrounding type magnetic core PFC inductor

Info

Publication number: CN217788161U
Application number: CN202221737922.7U
Authority: CN
Inventors: 刘华朝
Original assignee: Shenzhen Zhongzheng Magnetic Energy Technology Co ltd
Current assignee: Shenzhen Huarui Magnetic Energy Technology Co ltd
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-11-11
Anticipated expiration: 2032-07-05

Abstract

The utility model relates to a PFC inductance technical field especially relates to a unilateral pin enclosed magnetic core PFC inductance, include bobbin, magnetic core group and twine the winding on bobbin, magnetic core group is including last magnetic core and lower magnetic core of splicing each other and locate the magnetic core and/or the stem on the magnetic core down, it includes the top cap to go up the magnetic core, the magnetic core includes the bottom and locates the bottom lateral wall of border department all around, go up the magnetic core and splice back internal formation installation cavity with lower magnetic core, bobbin and the assembly body of winding install in the installation cavity and by last magnetic core and lower magnetic core surround. The utility model discloses a set up the last magnetic core and the lower magnetic core of mutual concatenation to install the assembly body of bobbin and coil in the installation cavity that supreme magnetic core and lower magnetic core concatenation formed, make the coil whole by go up the magnetic core and surround with lower magnetic core, improved the magnetic core utilization ratio, have good magnetic screen ability, and reduced the whole volume of PFC inductance.

Description

Unilateral pin surrounding type magnetic core PFC inductor

Technical Field

The utility model relates to a PFC inductance technical field especially relates to an unilateral pin enclosed magnetic core PFC inductance.

Background

The PFC inductance is an inductor for forming a PFC circuit, and can improve power factors in the circuit, reduce reactive power in the circuit and improve the power conversion effect through a circuit structure. The PFC inductor is usually manufactured by adopting a framework and a magnetic core, an enameled wire is wound outside a bobbin body of the framework to form a winding, then a wire end of a leading-out end of the enameled wire is fixed on a contact pin of the framework, and finally a cylinder body of the magnetic core is inserted into the bobbin body of the framework to enable the winding to be positioned in a shielding cover of the magnetic core.

However, most of the existing PFC inductors adopt a vertical annular magnetic core structure, which results in a high height of a final product and a large volume, and under the condition of limited installation positions, the installation difficulty is increased or the installation is directly impossible.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem in the above-mentioned background art, the utility model provides an unilateral pin enclosed magnetic core PFC inductance has advantages such as the magnetic core high-usage, the magnetic screen function is strong, and whole small.

The utility model provides a scheme that its technical problem adopted is: the utility model provides a veneer pin enclosed magnetic core PFC inductance, includes bobbin, magnetic core group and twines the winding on bobbin, magnetic core group is including the last magnetic core of mutual concatenation and lower magnetic core and locate the magnetic core and/or locate down the stem on the magnetic core, it includes the top cap to go up the magnetic core, the magnetic core includes the bottom down and locates the bottom lateral wall of border department all around, go up the magnetic core and splice back internal formation installation cavity with lower magnetic core, bobbin and the assembly body of winding install in the installation cavity and by last magnetic core and lower magnetic core surround.

Further, the stem is positioned in the mounting cavity, and the stem is vertically connected to the end surface of the bottom cover and/or vertically connected to the end surface of the top cover.

Furthermore, the winding framework comprises a winding post, an upper end plate and a lower end plate, wherein the upper end plate and the lower end plate are respectively arranged at the upper end and the lower end of the winding post, and the winding is wound on the winding post.

Furthermore, a through hole penetrating through the upper end plate and the lower end plate is formed in the winding post, and the core post is inserted into the through hole.

Furthermore, a wire hanging part is connected to the side wall of the upper end plate, a pin support is arranged at a position of the lower end plate corresponding to the wire hanging part, and an outgoing wire of the winding bypasses the wire hanging part and is connected to the pin support.

Furthermore, a plurality of pins are arranged at the bottom of the pin support, and all outgoing lines of the winding are connected with the pins respectively after bypassing the hanging wire part.

Furthermore, a plurality of pin holes are formed in the pin support, and all outgoing lines of the winding are connected into the pin holes after bypassing the hanging wire part.

Furthermore, the side wall is provided with an opening at the position corresponding to the pin support and the wire hanging part, and the pin support and the wire hanging part extend out of the opening.

Further, be equipped with the hanging wire barricade that surrounds the hanging wire portion on the up end plate terminal surface, be equipped with the support barricade that surrounds pin support on the lower end plate, be equipped with the hanging wire breach with hanging wire barricade structure looks adaptation on going up the magnetic core, be equipped with the support breach with support barricade structure looks adaptation down on the magnetic core, hanging wire barricade and hanging wire breach gomphosis, support barricade and support breach gomphosis.

Furthermore, the bottom of the lower magnetic core is provided with an insulating baffle, connecting holes are symmetrically formed in the insulating baffle at positions corresponding to the support notches, and the pins positioned on two sides of the pin support are inserted into the connecting holes.

To sum up, the beneficial effects of the utility model are that:

1. the utility model discloses a set up the last magnetic core and the lower magnetic core of mutual concatenation to install the assembly body of bobbin and coil in the installation cavity that supreme magnetic core and lower magnetic core concatenation formed, make the whole by last magnetic core and lower magnetic core of coil surround, improved the magnetic core utilization ratio, have good magnetic screen ability, and reduced the whole volume of PFC inductance.

2. The utility model discloses a with hanging wire portion and pin support setting in same one side, shortened winding inlet wire and the distance of being qualified for the next round of competitions, further reduced the whole volume of PFC inductance, be favorable to the miniaturized design of PFC inductance.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural diagram according to a first embodiment;

FIG. 2 is an exploded view of the first embodiment;

FIG. 3 is a schematic structural diagram according to a second embodiment;

FIG. 4 is an exploded view of the second embodiment;

FIG. 5 is a schematic structural diagram of another embodiment of the second embodiment;

FIG. 6 is an exploded view of another embodiment of the second embodiment;

fig. 7 is an exploded view of the third embodiment.

In the figure: 1. winding a bobbin; 11. a winding post; 12. an upper end plate; 121. hanging a wire and retaining walls; 13. a lower end plate; 14. a through hole; 15. a wire hanging part; 151. a wire clamp slot; 16. a pin support; 161. a stitch; 162. a pin hole; 163. a bracket retaining wall; 2. a magnetic core group; 21. an upper magnetic core; 211. a top cover; 212. a wire hanging notch; 22. a lower magnetic core; 221. a bottom cover; 222. a side wall; 223. an opening; 224. a bracket notch; 23. a core column; 231. a core column block; 3. an insulating barrier; 31. and (4) connecting the holes.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following description of the present invention is provided in connection with the accompanying drawings.

It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. used herein indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. "plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The first embodiment is as follows:

as shown in fig. 1 to 2, a single-plate pin-surrounded magnetic core PFC inductor includes a winding frame 1, a magnetic core group 2 and a winding, and the assembly of the winding frame 1 and the winding is surrounded by the magnetic core group 2 by winding the winding on the winding frame 1, so as to realize the assembly of the PFC inductor; magnetic core group 2 in this embodiment includes last magnetic core 21 and lower magnetic core 22 of mutual concatenation and locates the stem 23 on magnetic core 21 or lower magnetic core 22, and stem 23 pegs graft in bobbin 1, goes up magnetic core 21 and surrounds bobbin 1 outside with lower magnetic core 22, makes the winding of winding on bobbin 1 can be enclosed and carries out the magnetism shielding between magnetic core group 2.

The cross section of the upper magnetic core 21 in the first embodiment is of a T-shaped structure, and comprises a top cover 211 and a core column 23 vertically connected to the bottom end face of the top cover 211, the lower magnetic core 22 is of a uncovered cavity structure and comprises a bottom cover 221 and a side wall 222 connected to the periphery of the bottom cover 221, when the upper magnetic core 21 is spliced with the lower magnetic core 22, the lower end face of the core column 23 abuts against the upper end face of the bottom cover 221, the top end face of the side wall 222 abuts against the lower end face of the top cover 211, and a mounting cavity is formed inside the upper magnetic core 21 and the lower magnetic core 22, and by mounting the bobbin 1 in the mounting cavity, the winding bobbin 1 and the winding are surrounded, so that the utilization rate of the magnetic core group 2 is increased, and the magnetic shielding function of the PFC inductor is enhanced; meanwhile, when the winding bobbin 1 is installed in the installation cavity, the upper end face of the winding bobbin 1 is attached to the lower end face of the top cover 211, the lower end face of the winding bobbin 1 is attached to the lower end face of the bottom cover 221, and the core column 23 is inserted into the through hole 14 of the winding bobbin 1, so that the overall structure of the PFC inductor is more compact, and the size of the PFC inductor is reduced.

The winding framework 1 in the embodiment comprises a winding post 11, and an upper end plate 12 and a lower end plate 13 which are respectively arranged at the upper end and the lower end of the winding post 11, wherein a winding is wound on the winding post 11, and the winding position of the winding is limited by the upper end plate 12 and the lower end plate 13; the through holes 14 of the present embodiment are disposed in the winding post 11 and along the length direction of the winding post 11, and the through holes 14 penetrate through the upper end plate 12 and the lower end plate 13, respectively, so as to facilitate the insertion installation of the core column 23; after the core column 23 is inserted into the through hole 14, the winding is surrounded in the space formed by combining the upper magnetic core 21, the lower magnetic core 22 and the core column 23, so that most of the winding is wrapped by the magnetic core, the magnetic shielding capability of the winding is enhanced, and the magnetic flux leakage phenomenon can be reduced.

As shown in fig. 2, the hanging portion 15 is connected to the side wall 222 of the upper end plate 12, and the pin support 16 is disposed at the position of the lower end plate 13 corresponding to the hanging portion 15, so that when the winding is connected to the pins, the outgoing lines of the winding can be led out around the hanging portion 15 and then connected to the pin support 16, thereby avoiding mutual interference when the outgoing lines are connected; the wire inlet end and the wire outlet end of the embodiment are both arranged on the pin support 16, so that the distance between the wire inlet end and the wire outlet end of the winding is shortened, the arrangement of the pin support 16 is reduced, and the carp PFC inductor is designed in a miniaturized manner.

In the embodiment, the side wall 222 is provided with an opening 223 at a position corresponding to the pin support 16 and the wire hanging part 15, and both the pin support 16 and the wire hanging part 15 extend out of the opening 223, so as to be conveniently connected with a power switch; the positions of the wire hanging portion 15 and the lead frame 16 of the present embodiment are located on the same side, and the wire inlet end and the wire outlet end of the winding are both disposed on the lead frame 16, so as to reduce the number of the openings 223, and increase the surrounding area of the magnetic core set 2 as much as possible.

The wire hanging part 15 of the embodiment is provided with the wire clamping groove 151 for winding, and when each outgoing wire of the winding is connected with the pin support 16, the outgoing wires can be separated by the wire clamping groove 151, so that the influence of the mutual interference of the adjacent outgoing wires on the normal work of the PFC inductor is avoided.

As shown in fig. 1 and fig. 2, a plurality of pins 161 are provided at the bottom of the pin support 16 of the first embodiment, and the outgoing line of the winding can be connected to the pins 161 to realize connection with the switch circuit; in this embodiment, the number of the pins 161 is the same as that of the line card slots 151, so that each outgoing line of the winding can be wound around the line card slot 151 and connected to each pin 161, thereby realizing connection with the switch circuit.

Example two:

as shown in fig. 3 to 6, the difference from the first embodiment is that the core column 23 of the second embodiment is vertically connected to the upper end surface of the bottom cover 221 of the lower magnetic core 22, and when the bobbin 1 is installed, the core column 23 is inserted into the through hole 14 from the bottom of the bobbin 1, and the same effect as the first embodiment can be obtained; in order to realize stable installation of the upper magnetic core 21 and the lower magnetic core 22, in the second embodiment, a wire hanging retaining wall 121 surrounding the wire hanging portion 15 is further disposed on the end surface of the upper end plate 12, a support retaining wall 163 surrounding the lead support 16 is disposed on the lower end plate 13, a wire hanging notch 212 matching with the structure of the wire hanging retaining wall 121 is disposed on the top cover 211 of the upper magnetic core 21, a support notch 224 matching with the structure of the support retaining wall 163 is disposed on the lower magnetic core 22, so that when the upper magnetic core 21 is installed on the bobbin 1, the wire hanging retaining wall 121 can be embedded in the wire hanging notch 212, and when the lower magnetic core 22 is installed at the bottom of the bobbin 1, the support retaining wall 163 can be embedded in the support notch 224, thereby realizing stable installation of the upper magnetic core 21 and the lower magnetic core 22, and avoiding looseness;

meanwhile, the bottom of the lower magnetic core 22 in the second embodiment is also provided with the insulating barrier 3, so that when the PFC inductor in the second embodiment is installed, the installation insulating distance can be increased through the insulating barrier 3, and the stability of the PFC inductor is further improved; the cross section of the insulating barrier piece 3 in this embodiment is the same as that of the lower magnetic core 22, and in order to implement the installation of the insulating barrier piece 3, the connecting holes 31 are symmetrically formed in the positions, corresponding to the support notches 224, of the insulating barrier piece 3 in this embodiment, so that when the insulating barrier piece 3 is installed, pins 161 located at two sides of the pin support 16 can be inserted into the connecting holes 31, and thus the working stability of the PFC inductor is improved.

In another embodiment, as shown in fig. 5 and 6, the upper core 21 and the lower core 22 have the same structure, and the stem 23 includes two stem blocks 231 having the same structure, and the two stem blocks 23 are respectively vertically connected to the lower end surface of the top cover 211 of the upper core 21 and the upper end surface of the bottom cover 221 of the lower core 22, when the upper core 21 and the lower core 22 are mounted on the bobbin 1, the two stem blocks 231 are inserted into the through hole 14 of the bobbin 1, and the end surfaces of the two stem blocks 231 are tightly attached to the through hole 14 to form the stem 23, and the end surfaces of the side walls 222 of the upper core 21 and the lower core 22 having the same structure are abutted against each other to surround the bobbin 1, thereby achieving the same technical effects as in the first embodiment.

Example three:

as shown in fig. 7, the difference from the first embodiment is that a plurality of pin holes 162 are formed in the pin holder 16 of the third embodiment, and the outgoing line of the winding can be connected to the circuit board of the switching power supply through the pin holes 162; the number of the pin holes 162 is the same as that of the line card slots 151, so that each outgoing line led out from the line card slots 151 can be connected to each pin hole 162; when the outgoing lines of the windings are connected, the outgoing lines are wound around the line clamping grooves 151 and are inserted into the pin holes 162, and pass through the pin holes 162 to be connected with the switch circuit.

The working principle of the embodiment is as follows: in the embodiment, the upper magnetic core 21 and the lower magnetic core 22 which are spliced with each other are arranged, and the assembly body of the bobbin 1 and the coil is installed in the installation cavity formed by splicing the upper magnetic core 21 and the lower magnetic core 22, so that the coil is integrally surrounded by the upper magnetic core 21 and the lower magnetic core 22, the utilization rate of the magnetic cores is improved, and the magnetic shielding capacity is good; and, when the last magnetic core 21 of this embodiment was installed with lower magnetic core 22, the inner wall of going up magnetic core 21 and lower magnetic core 22 all with winding skeleton 1 butt to reduce the whole volume of PFC inductance, be favorable to miniaturized product design.

The above-mentioned embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and modifications made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a unilateral pin enclosed magnetic core PFC inductance, includes bobbin (1), magnetic core group (2) and twines the winding on bobbin (1), its characterized in that: magnetic core group (2) including last magnetic core (21) and lower magnetic core (22) of mutual concatenation and locate magnetic core (21) and/or down stem (23) on magnetic core (22), it includes top cap (211) to go up magnetic core (21), lower magnetic core (22) include bottom (221) and locate bottom (221) side wall (222) of border department all around, go up inside formation installation cavity behind magnetic core (21) and lower magnetic core (22) concatenation, bobbin (1) and the assembly body of winding install in the installation cavity and by last magnetic core (21) and lower magnetic core (22) surround.

2. The single-sided pin-on core PFC inductor of claim 1, wherein: the stem (23) is positioned in the mounting cavity, and the stem (23) is vertically connected to the end surface of the bottom cover (221) and/or the end surface of the top cover (211).

3. The single-sided pin-on core PFC inductor of claim 2, wherein: the winding framework (1) comprises winding posts (11), an upper end plate (12) and a lower end plate (13) which are respectively arranged at the upper end and the lower end of each winding post (11), and the windings are wound on the winding posts (11).

4. The single-sided pin-on core PFC inductor of claim 3, wherein: the winding post (11) is internally provided with a through hole (14) penetrating through the upper end plate (12) and the lower end plate (13), and the core post (23) is inserted in the through hole (14).

5. The single-leg wound core PFC inductor of claim 4, wherein: the winding is characterized in that a hanging wire part (15) is connected to the side wall (222) of the upper end plate (12), a pin support (16) is arranged at the position, corresponding to the hanging wire part (15), of the lower end plate (13), and the outgoing wire of the winding bypasses the hanging wire part (15) and is connected to the pin support (16).

6. The single-sided pin-on core PFC inductor of claim 5, wherein: a plurality of pins (161) are arranged at the bottom of the pin support (16), and each outgoing line of the winding is connected with each pin (161) after bypassing the hanging wire part (15).

7. The single-sided pin-on core PFC inductor of claim 5, wherein: the winding is characterized in that the pin support (16) is provided with a plurality of pin holes (162), and each outgoing line of the winding is connected in each pin hole (162) after bypassing the hanging wire part (15).

8. The single-sided pin-around core PFC inductor according to any one of claims 6 and 7, wherein: openings (223) are formed in the positions, corresponding to the pin support (16) and the wire hanging portion (15), of the side wall (222), and the pin support (16) and the wire hanging portion (15) extend out of the openings (223).

9. The single-sided pin-on core PFC inductor of claim 6, wherein: be equipped with on upper end plate (12) terminal surface and surround hanging line barricade (121) of hanging line portion (15), be equipped with on lower end plate (13) and surround support barricade (163) of pin support (16), be equipped with on going up magnetic core (21) with hanging line barricade (121) structure looks adaptation hang line breach (212), be equipped with on lower magnetic core (22) with support barricade (163) structure looks adaptation support breach (224), hanging line barricade (121) and hanging line breach (212) gomphosis, support barricade (163) and support breach (224) gomphosis.

10. The single-sided pin-on core PFC inductor of claim 9, wherein: the bottom of the lower magnetic core (22) is provided with an insulating blocking piece (3), connecting holes (31) are symmetrically formed in positions, corresponding to the support notches (224), of the insulating blocking piece (3), and the pins (161) located on two sides of the pin support (16) are inserted into the connecting holes (31).