CN212810002U

CN212810002U - Hybrid integrated magnetic circuit step-up transformer for communication module

Info

Publication number: CN212810002U
Application number: CN202021680976.5U
Authority: CN
Inventors: 费云波; 欧晓红
Original assignee: Chengdu Jinzhichuan Electronic Co ltd
Current assignee: Chengdu Jinzhichuan Electronic Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-03-26
Anticipated expiration: 2030-08-13

Abstract

A magnetic core main body is formed by splicing a pair of C-shaped magnetic cores, a first center pillar and a second center pillar which are vertical to the bottom surface of each C-shaped magnetic core are arranged at the bottom of each C-shaped magnetic core, the first center pillar is formed after the first center pillars are spliced, the second center pillar is formed after the second center pillars are spliced, and gaps exist in the middle parts of the first center pillar and the second center pillar; a plurality of segmented air gap magnetic materials and non-ferromagnetic media which are connected with the central column I are arranged in the gap of the central column I, the segmented air gap magnetic materials and the non-ferromagnetic media are distributed at intervals, and a single-opening air gap is formed in the gap of the middle part of the central column II; and the second coil is wound outside the first center pillar to form a secondary winding of the transformer, and the coils are simultaneously wound outside the first center pillar and the second coil to form a combination of a primary winding and an inductor of the transformer. The utility model discloses be in the same place resonance inductance and main transformer integration, sharing a pair magnetic core, great reduction the board area of product, improved the utilization ratio of magnetic core, reduced the copper loss, saved the cost of product.

Description

Hybrid integrated magnetic circuit step-up transformer for communication module

Technical Field

The utility model relates to a transformer technical field especially relates to a mix integrated magnetic circuit step up transformer for communication module.

Background

The transformer is a device for transmitting electric energy or electric signals by utilizing the electromagnetic induction principle, and has the functions of voltage transformation, current transformation and impedance transformation. The inductor mainly plays the roles of filtering, oscillating, delaying, trapping and the like in a circuit, and also has the roles of screening signals, filtering noise, stabilizing current, suppressing electromagnetic wave interference and the like. No matter a transformer or an inductor, a magnetic core is used, and in order to meet the design requirements of the transformer and the inductor, an air gap is often formed in the magnetic core, namely, in a magnetic circuit formed by a non-closed magnetic core, the air gap is a magnetic circuit part without the magnetic core, and the magnetic circuit part is formed by air, so that the magnetic circuit part is called an air gap, namely, the air gap for short. The air gap can avoid the magnetic saturation phenomenon under the alternating current large signal or direct current bias, and the inductance value can be better controlled.

As shown in fig. 6, the transformer 10 and the inductor 11 of the PCB in the prior art are not integrated, the transformer 10 and the inductor 11 occupy a large area of the PCB, and the transformer 10 and the inductor 11 are provided with magnetic cores, respectively, resulting in low energy density and high cost of the PCB.

SUMMERY OF THE UTILITY MODEL

Problem to among the prior art scheme, the utility model provides a mix integrated magnetic circuit step up transformer for communication module.

The utility model provides a following technical scheme: a magnetic core main body is formed by splicing a pair of C-shaped magnetic cores, a pair of first center pillars and second center pillars which correspond to the positions of the bottom surfaces of the magnetic cores respectively and are vertical to the bottom surfaces of the magnetic cores are arranged at the bottoms of the C-shaped magnetic cores, first center pillars are formed after the first center pillars are spliced, second center pillars are formed after the second center pillars are spliced, and gaps exist in the middle parts of the first center pillars and the second center pillars; a plurality of segmented air gap magnetic materials and non-ferromagnetic media which are connected with the first center pillar are arranged in the gap of the first center pillar, the segmented air gap magnetic materials and the non-ferromagnetic media are distributed at intervals, and a single-opening air gap is formed in the gap of the middle part of the second center pillar; and the second coil is wound outside the first center pillar to form a secondary winding of the transformer, and the coils are simultaneously wound outside the first center pillar and the second coil to form a combination of a primary winding and an inductor of the transformer.

Furthermore, the material of the magnetic core main body is Mn-Zn ferrite magnetic core.

Furthermore, the section of the segmented air gap magnetic material is the same as that of the center pillar I, and the section of the non-ferromagnetic medium is smaller than that of the center pillar I.

Furthermore, the segmented air gap magnetic material and the non-ferromagnetic medium are connected through heat conducting glue and connected with the first central column through the heat conducting glue.

Furthermore, the non-ferromagnetic medium material is alumina ceramics.

Furthermore, an arc-shaped groove parallel to the axis of the center pillar is formed in the inner side of the magnetic core main body.

The utility model has the advantages that: the utility model discloses be in the same place resonance inductance and main transformer integration, sharing a pair magnetic core, great reduction the board area of product, and resonance inductance and main transformer are separately through the work of the magnetic circuit of two differences, and are higher to the utilization ratio of magnetic core. Meanwhile, the resonant inductor and the primary side of the main transformer share the same winding, so that the utilization rate of materials is improved, copper loss is reduced compared with an uncomposited product, the cost of the product is saved, and the efficiency of the product is improved. And the magnetic core structure of the main body of the product is ferrite, and the product can work at higher working frequency.

Drawings

Fig. 1 is a schematic diagram of an embodiment of the present invention.

FIG. 2 is a cross-sectional view in the direction AB of the embodiment shown in FIG. 1.

Fig. 3 is a cross-sectional view in the vertical direction of the embodiment of fig. 1.

Fig. 4 is a schematic diagram of an embodiment of the C-shaped magnetic core of the present invention.

FIG. 5 is a cross-sectional view of the core body of the embodiment of FIG. 1 taken in the CD direction.

Fig. 6 is a schematic diagram of a PCB circuit board in the prior art.

Reference numerals: 1-a magnetic core body; 2, a first coil; 3-coil two; 4-a first middle column; 5-a second middle column; 6-segmented air gap magnetic material; 7-non-ferromagnetic media; 8-single open air gap; 9-a groove; 10-a transformer; 11-an inductance; 12-a first king post; 13-second central pillar.

Detailed Description

The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement the embodiments after studying the specification. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model provides a mix integrated magnetic circuit step-up transformer for communication module as shown in fig. 1-5, magnetic core main part 1 is formed by a pair of C type magnetic core concatenation, and the tank bottom of each C type magnetic core is equipped with a pair of position and corresponds respectively and perpendicular first center pillar 12 and the second center pillar 13 of magnetic core bottom surface, forms center pillar one 4 after the first center pillar 12 is spliced, forms center pillar two 5 after the second center pillar 13 is spliced, there is the clearance in the middle part of center pillar one 4 and center pillar two 5; a plurality of segmented air gap magnetic materials 6 and non-ferromagnetic media 7 which are connected with the first center pillar 12 are arranged in the gap of the first center pillar 4, the segmented air gap magnetic materials 6 and the non-ferromagnetic media 7 are distributed at intervals, and a single open air gap 8 is formed in the middle gap of the second center pillar 5; and the second coil 3 is wound outside the second center pillar 5 to form a secondary winding of the transformer, and the first coil 2 is simultaneously wound outside the first center pillar 4 and the second coil 3 to form a combination of a primary winding and an inductor of the transformer.

The principle of the utility model is as follows: the coil I2 is connected with current, the coil I2 is wound around the part of the center post I4 and the center post II 5 to generate magnetic lines of force which change along with time, the coil I2 generates induced potential, the center post II 5 is also wound with the coil II 3, the coil I2 and the coil II 3 generate mutual induction, at the moment, the coil I2 is equivalent to a primary winding of the transformer, and the coil II 3 is equivalent to a secondary winding of the transformer. The middle connecting part of the center post I4 is formed by connecting and combining segmented air gap magnetic materials 6 and non-ferromagnetic media 7 at intervals, and the non-ferromagnetic media 7 are equivalent to segmented air gaps and play a role in closing magnetic lines.

The center post I4 is a resonant circuit, the coverage of magnetic lines is large, and the eddy current loss is serious, so that the eddy current loss is reduced in a segmented air gap mode. When the magnetic force line passes through the segmented air gap magnetic material 6, the eddy current in each segmented air gap magnetic material 6 forms a narrow loop, the electrostatic kinetic force in the narrow loop is small, the loop length is large, and the resistivity of the segmented air gap magnetic material 6 is large, so the eddy current loss is obviously reduced.

The second center pillars 5 are transformer circuits, have small eddy current loss, and adopt a single-opening air gap mode, and as shown in fig. 3, the gaps between the second center pillars 5 form a single-opening air gap 8.

Specifically, the material of the magnetic core main body 1 is Mn-Zn ferrite magnetic core, and the Mn-Zn ferrite magnetic core has high initial permeability, low loss and low price in medium and low frequency (less than 1 MHz) application occasions.

Specifically, the section of the segmented air-gap magnetic material 6 is the same as that of the center pillar one 4, so that the AE values (effective sectional areas of magnetic cores) of the segmented air-gap magnetic material 6 and the center pillar one 4 are approximately the same, and serious local heating is avoided; the cross section of the non-ferromagnetic medium 7 is smaller than that of the center pillar I4, so that the bonding is facilitated.

Specifically, the segmented air gap magnetic material 6 and the non-ferromagnetic medium 7 are connected through heat-conducting glue and connected with the center post I4 through the heat-conducting glue, and the phenomenon that the segmented air gap magnetic material 6 is overheated can be avoided through the heat-conducting glue.

Specifically, the non-ferromagnetic medium 7 is made of alumina ceramic, has a high thermal conductivity coefficient, and can quickly conduct heat generated by the segmented air gap magnetic material 6.

Specifically, as shown in fig. 2 and 4, the inner side of the magnetic core main body 1 is provided with an arc-shaped groove 9 parallel to the axis of the center pillar one 4, so that the coil one 2 and the coil two 3 are prevented from wrapping the outer side of the center pillar two 5 and not interfering with the inner side of the magnetic core main body 1.

The foregoing is directed to embodiments of the present invention, and the description is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a mix integrated magnetic circuit step-up transformer for communication module which characterized in that: the magnetic core main body (1) is formed by splicing a pair of C-shaped magnetic cores, a pair of first center pillars (12) and second center pillars (13) which correspond to the positions of the bottom surfaces of the magnetic cores respectively and are vertical to the bottom surfaces of the magnetic cores are arranged at the bottoms of the C-shaped magnetic cores, the first center pillars (12) are spliced to form first center pillars (4), and the second center pillars (13) are spliced to form second center pillars (5); gaps are formed in the middle parts of the first middle column (4) and the second middle column (5); a plurality of segmented air gap magnetic materials (6) and non-ferromagnetic media (7) which are connected with the first center pillar (12) are arranged in the gap of the first center pillar (4), the segmented air gap magnetic materials (6) and the non-ferromagnetic media (7) are distributed at intervals, and a single-opening air gap (8) is formed in the gap of the middle part of the second center pillar (5); and a second coil (3) is wound outside the second center pillar (5) to form a secondary winding of the transformer, and a first coil (2) is simultaneously wound outside the first center pillar (4) and the second coil (3) to form a combination of a primary winding and an inductor of the transformer.

2. A hybrid integrated magnetic circuit step-up transformer for a communication module as claimed in claim 1, wherein: the material of the magnetic core main body (1) is Mn-Zn ferrite magnetic core.

3. A hybrid integrated magnetic circuit step-up transformer for a communication module as claimed in claim 1, wherein: the section of the segmented air gap magnetic material (6) is the same as that of the center pillar I (4), and the section of the non-ferromagnetic medium (7) is smaller than that of the center pillar I (4).

4. A hybrid integrated magnetic circuit step-up transformer for a communication module as claimed in claim 1, wherein: the segmented air gap magnetic material (6) is connected with the non-ferromagnetic medium (7) through heat-conducting glue, and is connected with the central column I (4) through the heat-conducting glue.

5. A hybrid integrated magnetic circuit step-up transformer for a communication module as claimed in claim 1, wherein: the non-ferromagnetic medium (7) is made of aluminum oxide ceramic.

6. A hybrid integrated magnetic circuit step-up transformer for a communication module as claimed in claim 1, wherein: an arc-shaped groove (9) parallel to the axis of the first center pillar (4) is formed in the inner side of the magnetic core main body (1).