CN112614679A

CN112614679A - N unification inductance

Info

Publication number: CN112614679A
Application number: CN202011482358.4A
Authority: CN
Inventors: 王议锋; 程鹏宇; 马小勇; 陶珑; 赵丹枫; 张明智
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-04-06

Abstract

The invention discloses an N-in-one inductor, wherein N is N²And n is 1,2,3 …, each two adjacent inductors have a shared arm, and magnetic paths between the adjacent inductors sharing the same shared arm are mutually cancelled. Because the magnetic circuits on the common arm are mutually offset, the cross sections of the parts can be reduced, the volume and the weight of the synthesized inductor are reduced, the miniaturization and the light weight of the inductor are finally realized, and the cost is reduced. The invention has wide application range and strong operability, has the development and application of modularization, standardization and generalization, and can effectively solve the problems existing in the prior staggered parallel topology.

Description

N unification inductance

Technical Field

The invention relates to the field of electronic components, in particular to a novel N-in-one inductor.

Background

Although the problem that the output power of the DC/DC converter is continuously increased is solved by adopting the staggered parallel technology, the number of magnetic elements in the converter is multiplied, so that the size, the weight and the cost of the converter are increased. In order to reduce the number of magnetic elements in the converter, the magnetic components in the converter may be integrated, i.e. using magnetic integration techniques. By adopting the technology, the problems of large volume and large quantity of magnetic elements in the converter can be solved, and the steady-state and transient performance of the circuit can be improved.

The traditional coupling inductor has the problems that 1, the winding and the magnetic circuit are relatively concentrated, so that the magnetic pressure distribution is uneven, and the eddy current loss, the iron core loss and the electromagnetic interference of a magnetic piece are overlarge. 2. The magnetic circuit model is too complex, the edge and air gap magnetic resistance is difficult to calculate, and the symmetric coupling of the winding is not suitable to be realized. 3. High cost, difficult heat dissipation, difficult industrial production and the like.

Therefore, in order to improve some problems of the existing coupling inductor, a novel coupling inductor is provided. The method has the advantages that the magnetic circuit distribution is more uniform, the coupling degree is increased, and the eddy current loss and the copper loss of the winding can be effectively reduced. And secondly, the production cost is reduced, and the iron core and copper materials are saved. And thirdly, the method has the characteristics of simple and convenient design and convenience for industrial production.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide an N-in-one inductor, wherein N inductors are integrated into one inductor to be designed and manufactured under the condition that each inductor can work independently, so that the volume and the material consumption are reduced. Wherein N is N²，n＝1，2，3……。

The purpose of the invention is realized by the following technical scheme:

an N-in-one inductor, N ═ N²And n is 1,2,3 … …, each two adjacent inductors have a shared arm, and magnetic paths between the adjacent inductors sharing the same shared arm are mutually cancelled.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

1. this patent proposes an N unification inductance, has a sharing arm between per two adjacent inductances wherein, on at least one sharing arm, the magnetic circuit of two adjacent inductances offsets each other.

2. Because the magnetic circuits on the common arm are mutually offset, the cross sections of the parts can be reduced, the volume and the weight of the synthesized inductor are reduced, the miniaturization and the light weight of the inductor are finally realized, and the cost is reduced.

3. The invention has wide application range and strong operability, has the development and application of modularization, standardization and generalization, and can effectively solve the problems existing in the prior staggered parallel topology.

4. And secondly, the production cost is reduced, and the iron core and copper materials are saved. And thirdly, the design is simple and convenient, and the industrial production is convenient.

Drawings

FIG. 1 is a schematic diagram of an N-up coupled inductor.

FIG. 2 is a schematic diagram of a 9-in-one coupled inductor.

Fig. 3 is a schematic diagram of a single inductor configuration.

FIG. 4 is a schematic diagram of the first 9 single inductors of magnetic integration.

Fig. 5 is a schematic diagram of a variation of the arrangement of inductors.

Fig. 6 is a schematic diagram of an integrated inductor.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides an N-in-one inductor as shown in figure 1, wherein N inductors are integrated into one inductor to be designed and manufactured under the condition that each inductor can work independently, so that the volume and the material consumption are reduced. Wherein N is N²N is 1,2,3 … …; wherein, a shared arm is arranged between every two adjacent inductors, and the magnetic circuits between the adjacent inductors sharing the same shared arm are mutually offset.

In the embodiment of the present invention, a 9-in-one inductor is taken as an example for description, and for convenience of description, a coordinate system is established, as shown in fig. 2, under the condition that the inductance value, the characteristics and the like of each inductor are not changed, 9 inductors (1, 1) - (3, 3) are combined into one inductor, and the total weight and the volume of the inductor are smaller than the total weight and the volume of the original plurality of inductors, so as to achieve the purpose of magnetic integration. Wherein the first inductor is located at (1, 1), the second inductor is located at (1, 2), the third inductor is located at (1, 3), the fourth inductor is located at (2, 1), the fifth inductor is located at (2, 2), the sixth inductor is located at (2, 3), the seventh inductor is located at (3, 1), the eighth inductor is located at (3, 2), the ninth inductor is located at (3, 3)

The first shared arm is arranged between the first inductor and the second inductor, the second shared arm is arranged between the second inductor and the third inductor, the third shared arm is arranged between the fourth inductor and the fifth inductor, the fourth shared arm is arranged between the fifth inductor and the sixth inductor, the fifth shared arm is arranged between the seventh inductor and the eighth inductor, the sixth shared arm is arranged between the eighth inductor and the ninth inductor, the seventh shared arm is arranged between the first inductor and the fourth inductor, the eighth shared arm is arranged between the second inductor and the fifth inductor, the ninth shared arm is arranged between the third inductor and the sixth inductor, the tenth shared arm is arranged between the fourth inductor and the seventh inductor, the eleventh shared arm is arranged between the fifth inductor and the eighth inductor, and the twelfth shared arm is arranged between the sixth inductor and the ninth inductor. The magnetic paths on the common arms cancel each other out. Because the magnetic circuits on the common arm are mutually offset, the cross sections of the parts can be reduced, the volume and the weight of the synthesized inductor are reduced, the miniaturization and the light weight of the inductor are finally realized, and the cost is reduced. And secondly, the production cost is reduced, and the iron core and copper materials are saved. And thirdly, the design is simple and convenient, and the industrial production is convenient.

In this embodiment, magnetic integration is further performed using a shared magnetic circuit. In brief, the design of the nine-in-one inductor is to make the nine inductors share the magnetic circuit. On the magnetic circuit of the shared part, the directions of the magnetic beams generated by each coil are mutually offset directions, and the magnetic beams which cannot be completely offset pass through the shared magnetic circuit part, so that the material consumption is reduced. And simultaneously, the heat generation amount on the shared magnetic circuit is reduced due to mutual offset.

Figure 4 shows nine single inductors before integration. Referring to fig. 4, nine single inductors (1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3), (3, 1), (3, 2), and (3, 3) are arranged. As shown in fig. 3, each single inductor has a coil and a plurality of coils made of magnetic material.

The direction of the arrow in fig. 4 is a magnetic flux direction. As can be seen from fig. 4, the single inductors have the same magnetic flux distribution therebetween. Between the first inductor (1, 1) and the second inductor (1, 2), the magnetic flux directions of the adjacent magnetic columns are opposite. Similarly, the magnetic flux directions of the adjacent magnetic columns are opposite between the second inductors (1, 2) and the third inductors (1, 3). This is the basis for the integration of the inductance.

To integrate the inductors, it is preferable to rearrange the single inductor shown in fig. 4. Specifically, the second inductors (1, 2), the fifth inductors (2, 2), and the seventh inductors (3, 2) are turned upside down, as shown in fig. 5. Thus, the magnetic flux directions of the adjacent magnetic columns are opposite between the first inductor (1, 1) and the second inductor (1, 2). Between the second inductor and the third inductor, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the first inductor and the fourth inductor, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the second inductor and the fifth inductor, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the third inductance and the sixth inductance, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the fourth inductance and the fifth inductance, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the fifth inductance and the sixth inductance, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the seventh inductor and the eighth inductor, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the eighth inductor and the ninth inductor, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the fourth inductance and the seventh inductance, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the fifth inductance and the eighth inductance, the magnetic flux directions of the adjacent magnetic columns are opposite. Between the sixth inductance and the ninth inductance, the magnetic flux directions of the adjacent magnetic columns are opposite.

Magnetic integration is performed according to the arrangement shown in fig. 5, so as to obtain the nine-in-one inductor shown in fig. 6 according to the embodiment of the present invention. Referring to fig. 6, the nine-in-one inductor is still divided into a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a sixth inductor, a seventh inductor, an eighth inductor, and a ninth inductor, and as can be seen from the magnetic circuit distribution of fig. 3, the directions of the magnetic fluxes on the common magnetic columns of the common inductors are opposite.

Under the condition that the currents flowing through the nine inductors are completely the same, the cross sections of the shared magnetic columns on which the magnetic circuits are mutually cancelled can be infinitely close to 0 theoretically due to the fact that the magnetic fluxes are the same in magnitude and opposite in direction. Therefore, the size and the weight of the nine-in-one inductor are reduced, and the purpose of reducing the cost is achieved.

Therefore, the N-in-one inductor reduces the volume and weight of the synthesized inductor through the shared magnetic circuit among the inductors, finally realizes the miniaturization and the light weight of the inductor and reduces the cost. The embodiment of the invention can be used for a multiphase staggered medium-inductance design scheme and can also be used for synthesizing a plurality of low-capacity inductors into a large-capacity inductor.

The present invention is not limited to the above-described embodiments. The foregoing description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above specific embodiments are merely illustrative and not restrictive. Those skilled in the art can make many changes and modifications to the invention without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An N-in-one inductor, wherein N is N²And n is 1,2,3 … …, each two adjacent inductors have a shared arm, and magnetic paths between the adjacent inductors sharing the same shared arm are mutually cancelled.