CN211907185U

CN211907185U - Two-path magnetic integrated inductor with high balance rate

Info

Publication number: CN211907185U
Application number: CN201922237140.1U
Authority: CN
Inventors: 李福元; 李宾; 仇亮安; 胡维生
Original assignee: Shinenergy Technology Shanghai Co ltd
Current assignee: Shinenergy Technology Shanghai Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-11-10
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses a two-path magnetic integrated inductor with high balance rate, which comprises an upper yoke, a lower yoke and a left core column and a right core column with air gaps, wherein the upper yoke, the lower yoke and the core column are bonded together by an adhesive, and the whole body is fixed by a pressing plate and a screw rod; the coil is arranged on the left core column and the right core column with air gaps, and each coil is provided with an inner winding and an outer winding; the outer winding on the left core column is connected with the inner winding of the right core column in series to form an inductor, the inner winding of the left core column is connected with the outer winding of the right core column in series to form another inductor, and the two inductors are connected in series again. The utility model discloses every inductance coils all distributes about two posts, and the number of turns, magnetic core material and air gap of two inductance coils are all the same, and the inductance value difference of those two inductances is less than 1%, and is the no difference basically.

Description

Two-path magnetic integrated inductor with high balance rate

Technical Field

The utility model relates to a power electronic technology field, two way magnetism integrated inductor of high balancing rate very much.

Background

The power electronic half-bridge circuit and full-wave rectifier circuit applied in the current market is divided into two inductors of an upper half part and a lower half part, load current alternately flows through the two inductors, the difference of the inductance requirements of the circuit on the two inductors is less than 5%, preferably no difference can be made (the system has the best stability), the inductance of the inductor mainly depends on the magnetic core performance, the number of turns of a coil and the size of an air gap (including the thickness of adhesive for bonding) in the magnetic core, the inductance of the inductor depends on the magnetic core performance and the thickness of an air gap material after the number of turns of the coil is determined, the difference of the magnetic core performance and the air gap material thickness is 10-30% in practice, the difference of processes in the manufacturing process is added, the qualification rate of a balance rate index of the two inductors in batch is less than 60%, and the current three methods are mainly used for solving the following problems:

firstly, two independent inductors are manufactured: the inductance of each inductor is controlled within plus 5% of the rated inductance, so that the air gap of each inductor needs to be adjusted according to the actual test result, and the process time is long.

Secondly, a conjugate magnetic integrated inductor is manufactured: a set of magnetic core, including upper and lower yoke and two side columns and a center pillar, wherein two sets of coil respectively on two side columns, every side column represents an inductance, and the center pillar does not overlap the coil, and this kind of mode has saved a yoke iron than the first kind, but also because the magnetic circuit still is relative isolation, the inductance of two ways also has great difference in the manufacturing process, also needs to adjust the air gap in the processing procedure.

And thirdly, a magnetic integration two-column inductor is made, a set of magnetic core comprises an upper yoke, a lower yoke and two side columns (without middle columns), and the side columns are respectively provided with a coil, so that two yokes are saved compared with the first mode, and one yoke is saved compared with the second mode.

The three solutions have a common disadvantage of long manufacturing time, poor batch consistency and poor manufacturability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that two inductors are used to half-bridge circuit and full wave rectifier circuit, provide two way magnetic integrated inductor of high equilibrium rate, two way inductance difference of this two way magnetic integrated inductor of high equilibrium rate are less than within 1%, need not to consider two way inductance problems in the manufacturing process for the manufacturing process is simplified, and two way inductance equilibrium rate index qualification rate when in batches is more than 99.5%.

The utility model discloses the technical problem that will solve can realize through following technical scheme:

a two-path magnetic integrated inductor with high balance rate comprises an upper yoke, a lower yoke and a left core column and a right core column with air gaps, wherein the upper yoke, the lower yoke and the core columns are bonded together through an adhesive, and the whole body is fixed by a pressure plate and a screw; the coil is arranged on the left core column and the right core column with air gaps, and each coil is provided with an inner winding and an outer winding; the outer winding on the left core column is connected with the inner winding of the right core column in series to form an inductor, the inner winding of the left core column is connected with the outer winding of the right core column in series to form another inductor, and the two inductors are connected in series again. Therefore, each inductance coil is uniformly distributed on the left core column and the right core column, the number of turns, the material of the magnetic core and the air gap of the two inductance coils are the same, and the inductance difference of the two inductances is less than 1 percent and basically has no difference.

In a preferred embodiment of the invention, the coil is a foil-wound coil or a wire-wound coil or a stand-wound coil.

In a preferred embodiment of the present invention, the inductance value obtained by serially connecting the outer winding of the left core column, the inner winding of the right core column, the inner winding of the left core column and the outer winding of the right core column is 4 times the inductance value between the outer winding of the left core column and the inner winding of the right core column or between the inner winding of the left core column and the outer winding of the right core column.

The utility model discloses mainly used half-bridge circuit and full wave rectifier circuit involve two way bridge arm inductors.

Through the actual test, compared with the prior art, the utility model has the following advantages:

1. small volume and low cost: compared with the prior first and second schemes, the volume is smaller by 15 percent and more, and the cost is reduced by more than 10 percent;

2. the manufacturing method is as follows: the first pass percent in the manufacturing process is improved by more than 50 percent, and the balance rate of the two paths of inductors is improved from within 40 percent to 99 percent or more

3. The total inductance of the two coils after being connected in series is 4 times of that of a single inductor, and the total inductance of the two independent inductors after being connected in series is two times of that of the single inductor, so that the no-load loss of the inductors is reduced by 2-4 times, and the efficiency of the system is improved.

Drawings

Fig. 1 is the utility model discloses a two way magnetism integrated inductor application topological diagrams of high balancing rate.

Fig. 2 is the utility model relates to a two way magnetism integrated inductor electrical schematic diagrams of high balancing rate.

Fig. 3 is the utility model relates to a two way magnetism integrated inductor iron core structure charts of high balancing rate.

Fig. 4 is the utility model relates to a two way magnetism integrated inductor three-dimensional diagrams of high balancing rate.

Detailed Description

The present invention is described in detail below with reference to the attached drawings and the detailed description.

Referring to fig. 1 to 4, there is shown a two-way magnetic integrated inductor with high balancing rate (topology L1 and L2), which includes a left leg 10 with an air gap, a right leg 20 with an air gap, a left coil 30, a right coil 40, a lower yoke 50 and an upper yoke 60, wherein the upper end of the left leg 10 with an air gap and the upper end of the right leg 20 with an air gap are connected to the upper yoke 60 by an adhesive, the lower end of the left leg 10 with an air gap and the lower end of the right leg 20 with an air gap are connected to the lower yoke 50 by an adhesive, and the lower yoke 50 and the upper yoke 60 are connected by a lower yoke pressing plate 5 and an upper yoke pressing plate 6 through pulling

screws

7a and 7 b.

The upper yoke 60, the lower yoke 50, the left core column 10 and the right core column 20 are made of silicon steel sheets, ferrite, iron silicon powder cores, iron silicon aluminum or the like.

The left coil 30 is sleeved on the left stem 10 with the air gap, the right coil 40 is sleeved on the right stem 20 with the air gap, and the left coil 30 and the right coil 40 are foil-wound coils or wire-wound coils or vertical-wound coils.

The left coil 30 is provided with an inner winding 31 and an outer winding 32, and the parameters of the inner winding 31 and the outer winding 32 are consistent and are insulated from each other; the right coil 40 is provided with an inner winding 41 and an outer winding 42, and the inner winding 41 and the outer winding 42 have the same parameters and are insulated from each other

Referring to fig. 2, the outer winding 32 of the left coil 30 is connected in series with the inner winding 41 of the right coil 40 to form an inductor (L1 in fig. 1), the inner winding 31 of the left coil 30 is connected in series with the outer winding 42 of the right coil 40 to form another inductor (L2 in fig. 1), and the two inductors are connected in series. Left coil 30 is connected to right coil 40 as shown in fig. 2, with exposed connector end identified as 1/2/3 (i.e., 9/8/10 in fig. 4 and 1/2/3 in fig. 1).

The utility model is characterized in that the inductance between the outer winding 32 of the left coil 30 and the inner winding 41 of the right coil 40 and the inductance between the inner winding 31 of the left coil 30 and the outer winding 42 of the right coil 40 are not different, and the inductance balance is good. The inductance of the series connection of the outer winding 32 of the left coil 30, the inner winding 41 of the right coil 40, the inner winding 31 of the left coil 30 and the outer winding 42 of the right coil 40 is 4 times the inductance between the outer winding 32 of the left coil 30 and the inner winding 41 of the right coil 40 or between the inner winding 31 of the left coil 30 and the outer winding 42 of the right coil 40.

T1 in fig. 1 is a transformer, and A, B is the primary input terminal of the transformer T1.

The utility model discloses every inductance coil all learns to distribute on controlling two stem stems, and the number of turns, magnetic core material and air gap of two inductance coils are all the same, and the inductance difference of those two inductances is less than 1%, and is the no difference basically.

The utility model is used for half-bridge circuit and full wave rectifier circuit involve two way bridge arm inductors.

Claims

1. A two-path magnetic integrated inductor with high balance rate comprises an upper yoke, a lower yoke and a left core column and a right core column with air gaps, wherein the upper yoke, the lower yoke and the core columns are bonded together through an adhesive, and the whole body is fixed by a pressure plate and a screw; the coil is arranged on the left core column and the right core column with air gaps, and each coil is provided with an inner winding and an outer winding; the outer winding on the left core column is connected with the inner winding of the right core column in series to form an inductor, the inner winding of the left core column is connected with the outer winding of the right core column in series to form another inductor, and the two inductors are connected in series again.

2. A high balance ratio two-way magnetic integrated inductor as claimed in claim 1 wherein said coil is a foil-wound coil or a wire-wound coil or a vertically wound coil.

3. The two-way magnetic integrated inductor with high balance rate as claimed in claim 1, wherein the inductance of the series connection of the outer winding of the left core column, the inner winding of the right core column, the inner winding of the left core column and the outer winding of the right core column is 4 times the inductance between the outer winding of the left core column and the inner winding of the right core column or the inductance between the inner winding of the left core column and the outer winding of the right core column.