CN210606926U

CN210606926U - Two-way reactor

Info

Publication number: CN210606926U
Application number: CN201921996944.3U
Authority: CN
Inventors: 周腾; 吴智富
Original assignee: Anhui Yingdakot Magnetoelectric Technology Co Ltd
Current assignee: Anhui Yingdakot Magnetoelectric Technology Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-05-22
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses a two way reactors relates to power electronic technology field. The technical key points of the device comprise two middle column bodies, wherein the two middle column bodies are parallel and arranged at intervals; the number of the reactance coils is two, the number of turns and the winding direction of the two groups of reactance coils are the same and the two groups of reactance coils are respectively wound in the middle parts of the two middle columns; the connecting pieces are connected to two ends of the two middle columns respectively and fix the two middle columns, and a space is reserved between each connecting piece and the corresponding reactance coil; well cylinder and connecting piece structurally constitute closed annular but do not constitute closed magnetic circuit, the utility model has the advantages of inductance decay reduces under the heavy current, and the inductance uniformity is good.

Description

Two-way reactor

Technical Field

The utility model relates to a power electronic technology field, more specifically say, it relates to a two way reactors.

Background

The reactor is mainly used on the direct current side of the converter, and has more applications on a general frequency converter. The reactor has a dc current having an ac component flowing therethrough. The main purpose is to limit the AC component superimposed on the DC current to a specified value, keep the rectified current continuous, reduce the current ripple value, improve the input power factor and inhibit the harmonic wave generated by the converter.

With the development of power electronic technology and the expansion of application range, two rectification or inversion modules are often required to be operated in parallel. And if two reactors are directly connected in parallel, magnetic field interaction between the two reactors can be caused. Under the action of large current, the reactor is easy to form inductance saturation, and after the inductance saturation, the resistance of the reactor inductance to the current disappears to form a non-inductive-reactance lead; thereby affecting the operation of the circuit under high current conditions.

SUMMERY OF THE UTILITY MODEL

To the technical problem that has now, an object of the utility model is to provide a two way reactors, it has the inductance decay under the heavy current and reduces, advantage that the inductance uniformity is good.

In order to achieve the above purpose, the utility model provides a following technical scheme: a two-way reactor comprising:

the number of the middle columns is two, and the two middle columns are arranged in parallel at intervals;

the number of the reactance coils is two, the number of turns and the winding direction of the two groups of reactance coils are the same and the two groups of reactance coils are respectively wound in the middle parts of the two middle columns;

the connecting pieces are connected to two ends of the two middle columns respectively and fix the two middle columns, and a space is reserved between each connecting piece and the corresponding reactance coil;

the middle cylinder and the connecting piece structurally form a closed ring shape but do not form a closed magnetic circuit.

Through adopting above-mentioned technical scheme, the center pillar body interval is parallel, and reactor coil winds and establishes in center pillar body middle part for it makes things convenient for the direct parallel operation of two-wheeled to have the interval between two reactances. A closed annular structure is formed between the middle column body and the connecting piece, so that a framework structure formed by the middle column body and the connecting piece is stable and firm; and because the middle column body and the connecting piece do not form a closed magnetic circuit, the whole magnetic circuit is an open magnetic circuit passing through the external air, the two reactances are mutually independent and have larger inductance, the attenuation of the inductance is small under the condition of difficult saturation and large current, and the consistency of the direct current bias performance is good.

The utility model discloses further set up to: the reactance coil includes coil, last conducting strip and lower conducting strip, go up the conducting strip and all be on a parallel with coil axial setting down with the conducting strip, and go up the conducting strip and set up in reactance coil's the one side that is close to the outer lane, lower conducting strip sets up in reactance coil one side that is close to the inner circle, the coil is basically around establishing and being fixed in between conducting strip and the lower conducting strip.

By adopting the technical scheme, the framework of the reactance coil is formed by the upper conducting strip and the lower conducting strip, so that the overall structure of the reactance coil is stable, and meanwhile, the upper conducting strip and the lower conducting strip have the magnetic conduction effect, so that the overall inductance of the reactance coil in the axial direction is uniformly distributed.

The utility model discloses further set up to: the connecting piece comprises two connecting plates which are respectively and fixedly connected with two opposite end surfaces of the end part of the middle column body.

Through adopting above-mentioned technical scheme, the fixed firmness is promoted to the fixed mode of two connecting plates, makes simultaneously to have great air gap between two well cylinders.

The utility model discloses further set up to: the middle column body is made of nonmagnetic materials, and the connecting plate is made of magnetic conductive materials.

Through adopting above-mentioned technical scheme for can constitute closed annular but still can not constitute closed magnetic circuit between center pillar body and the connecting plate.

The utility model discloses further set up to: the middle column body is made of a magnetic conductive material, and the connecting plate is made of a non-magnetic material.

The utility model discloses further set up to: a plurality of separation supporting pieces are arranged between the middle cylinder and the reactance coil, the outer walls of the separation supporting pieces are attached to the reactance coil, and the inner walls of the separation supporting pieces are attached to the middle cylinder, so that a gap is formed between the middle cylinder and the reactance coil.

Through adopting above-mentioned technical scheme, separate support piece and make to produce the space between well cylinder and the reactance coil for can not direct contact between the iron core that well cylinder constitutes and the reactance coil, thereby guaranteed the stability of reactor.

The utility model discloses further set up to: the connector lug is electrically connected with the reactance coil; the outstanding current conducting plate that is provided with on the outer wall of connecting plate, the connector lug laminate in on the current conducting plate, and be provided with the ribbon of cover locating current conducting plate and connector lug outside with fixed connector lug on the current conducting plate.

Through adopting above-mentioned technical scheme, under the connecting plate was conducting material's the condition, through the mode of ribbon fixed connection lug, can avoid the electric current on the connector direct access to the connecting plate on with other circuit interference production influences.

The utility model discloses further set up to: the connector lug is electrically connected with the reactance coil; the connecting plate is fixed on the middle cylinder through bolts, the connector lug is fixed on the connecting plate through bolts and connected with the connecting plate and the middle cylinder and connected with the connector lug and the connecting plate through the same bolt.

By adopting the technical scheme, the connecting plate is made of the insulating material, so that the connecting plate can be fixed through the same bolt, and the connector lug can also be fixed through the same bolt.

The utility model discloses further set up to: the middle columns are arranged in parallel along the horizontal direction or the vertical direction.

By adopting the technical scheme, the arrangement direction of the middle cylinders can be adjusted according to different scene requirements.

The utility model discloses further set up to: a supporting bottom frame is fixed to one side of the bottom of the connecting piece, and bolt holes are formed in the supporting bottom frame.

Through adopting above-mentioned technical scheme, the connecting piece can the snap-on at organism or subaerial through supporting the chassis for the reactor monolithic stationary is firm, is difficult for being damaged.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the unsaturated characteristic of the existing non-closed magnetic circuit inductor is utilized, so that the inductor cannot lose effectiveness along with the increase of current, the direct current bias performance is consistent, and the inductor is almost not attenuated;

(2) overall structure is simple, and the installation is quick.

Drawings

Fig. 1 is a schematic structural diagram of two paths of inductors with iron cores in central columns;

FIG. 2 is a schematic cross-sectional view of two inductors with iron cores in the center pillar;

FIG. 3 is a schematic structural diagram of a two-way inductor with a hollow center pillar;

fig. 4 is a schematic front view of a two-way inductor with a hollow center pillar.

Reference numerals: 1. a middle column body; 2. a reactor coil; 3. a connecting member; 4. a connecting plate; 5. a connector lug; 6. a separation support; 7. corner supports; 8. an end face support; 9. a support plate; 10. a conductive plate; 11. binding a belt; 12. positioning a groove; 13. a support chassis; 14. winding a coil; 15. an upper conducting strip; 16. and a lower conductive sheet.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

The reactor mainly refers to an inductor which is mainly used for connecting the direct current side of the rectification or inversion module. The reactor is mainly used for limiting an alternating current component superposed on a direct current to a certain specified value, keeping a rectified current continuous and reducing a current ripple value. With the development of power electronic technology and the expansion of application range, two rectification or inversion modules are often required to be operated in parallel. The market has therefore had a need for two-way reactors in parallel.

A two-way reactor is shown in figure 1 and comprises two middle cylinders 1, two groups of reactance coils 2 and two groups of connecting pieces 3. The two middle columns 1 are arranged in parallel and at intervals, as shown in fig. 1, the middle columns 1 can be arranged in the horizontal direction, as shown in fig. 2, the middle columns 1 can also be arranged in parallel in the vertical direction; two groups of reactance coils 2 are respectively wound on the middle part of the middle column body 1 to respectively form two paths of reactors. Two groups of connecting pieces 3 are respectively connected at two ends of the middle cylinder 1 and fix the two middle cylinders 1, and a space is reserved between each connecting piece 3 and the corresponding reactance coil 2. In this embodiment, therefore, the center cylinder 1 and the connecting member 3 constitute a closed loop in structure, but constitute a non-closed magnetic circuit as viewed in magnetic circuit. The inductor of the non-closed magnetic circuit has the unsaturated characteristic, so that the inductor cannot fail along with the increase of current, and has consistent direct current bias performance.

As shown in fig. 1 and 2, the reactance coil 2 includes a winding coil 14, an upper conductive sheet 15 and a lower conductive sheet 16, both the upper conductive sheet 15 and the lower conductive sheet 16 are disposed in parallel with the axial direction of the winding coil 14, the upper conductive sheet 15 is disposed on a side of the reactance coil 2 close to the outer ring, the lower conductive sheet 16 is disposed on a side of the reactance coil 2 close to the inner ring, and the winding coil 14 is substantially wound and fixed between the upper conductive sheet 15 and the lower conductive sheet 16.

As shown in fig. 1 and 2, the connecting pieces 3 at both ends each include two connecting plates 4, the two connecting plates 4 are respectively and fixedly connected to two opposite end faces of the end portion of the middle column body 1, and the connecting plate 4 at one side of the connecting piece 3 is fixed with a connector lug 5 electrically connected with the reactance coil 2. The connector lug 5 on the connecting plate 4 at one end of the middle column 1 forms an input connector, and the connector lug on the connecting plate 4 at the other end of the middle column 1 forms an output connector. The number of the input connectors is two, and the two input connectors are electrically connected with the lower conducting strips 16 at the input ends of the two reactance coils 2 in a one-to-one correspondence manner. The number of the output connectors can be set to be one or two according to requirements. When the number of the output terminals is two, as shown in fig. 1, the two output terminals are electrically connected to the upper conductive plates 15 of the output terminals of the two reactor coils 2 in a one-to-one correspondence. And when the number of output terminals is one, see fig. 2, one output terminal is electrically connected to the upper conductive plates 15 at the output terminals of the two reactor coils 2.

In one embodiment, as shown in fig. 1, the middle column 1 is made of a magnetically conductive material and the connecting plate 4 is made of a non-magnetic material. So that it forms a closed loop in structure and a non-closed magnetic circuit on the magnetic circuit. In this embodiment, the reactor formed by the center pillar 1 and the reactor coil 2 is an iron core reactor. The iron core formed by the middle column 1 is a column without air gaps and upper and lower yokes, so that a closed magnetic circuit cannot be formed.

In another embodiment, as shown in fig. 3, the middle column 1 is made of a non-magnetic material and the connecting plate 4 is made of a magnetically conductive material. So that it forms a closed loop in structure and a non-closed magnetic circuit on the magnetic circuit. In this embodiment, the reactor formed by the center pillar 1 and the reactor coil 2 is an air core reactor. A closed magnetic circuit cannot be formed naturally.

Further, as shown in fig. 1 and 3, a plurality of separation supports 6 are disposed between the middle column 1 and the reactance coil 2, outer walls of the separation supports 6 are attached to the reactance coil 2, and inner walls of the separation supports 6 are attached to the middle column 1, so that a gap is generated between the middle column 1 and the reactance coil 2.

As shown in fig. 1, when the middle column body 1 is made of a magnetic conductive material, the outer cross section of the middle column body 1 adopted for obtaining magnetic induction is a rectangle slightly smaller than the inner circle of the reactance coil 2, and the distance between the middle column body 1 and the inner circle of the reactance coil 2 is small. In this case, therefore, the separation support 6 comprises four corner supports 7 arranged on the corners of the central column 1. The cross section of the corner support member 7 is approximately L-shaped, and the four corner support members 7 are made of glass fiber materials and play a role in supporting and insulating.

As shown in fig. 3 and 4, when the middle column 1 is made of a nonmagnetic material, the middle column 1 mainly functions only as a center skeleton, and therefore the area of the rectangle of the cross section of the middle column 1 is generally set to 1/4 to 1/2 in comparison with the rectangle of the inner circle of the reactor coil 2. The distance between the middle cylinder 1 and the inner circle of the reactance coil 2 is larger. In this case, therefore, the partition supports 6 include end face supports 8 provided on the four side walls of the middle cylinder 1. The end face support member 8 is in a gourd shape with large inner and outer end faces and small middle, and one or two end face support members 8 are arranged on the side wall end face of the middle cylinder 1 according to the distance between the middle cylinder 1 and the inner ring of the reactance coil 2. In addition, in order to improve the overall support of the inner ring of the reactor coil 2, a support plate 9 is arranged between the outer end face of the end face support 8 and the inner ring of the reactor coil 2, so that the four end faces of the inner wall of the reactor coil 2 are uniformly stressed. The end face support member 8 and the support plate 9 are made of glass fiber.

As shown in fig. 1, when the middle column 1 is made of a magnetic conductive material and the connecting plate 4 is made of a non-magnetic insulating material, the connecting plate 4 is fixed on the middle column 1 by bolts, and the connector lug 5 is fixed on the connecting plate 4 by bolts, and the same bolt is used for connecting the connecting plate 4 with the middle column 1 and connecting the connector lug 5 with the connecting plate 4. Further, in this state, the tab 5 is integrally connected to the upper conductive plate 15 or the lower conductive plate 16 so as to be bolted to the connecting plate 4.

As shown in fig. 3, when the middle column body 1 is made of a non-magnetic insulating material, and the connecting plate 4 is made of a metal material, an L-shaped conductive plate 10 protrudes from the outer wall of the connecting plate 4, the connector lug 5 is attached to the side wall of the conductive plate 10 parallel to the connecting plate 4, a binding band 11 which is sleeved on the conductive plate 10 and the connector lug 5 to fix the connector lug 5 is arranged on the conductive plate 10, the number of the binding bands 11 on the conductive plate 10 is at least two, and it is ensured that the connector lug 5 can be fixed firmly in the linear direction. In order to make the ribbon 11 slide on the conductive plate 10, the side wall of the conductive plate 10 is provided with a positioning groove 12 which is concave and in which the ribbon 11 is embedded. The connecting plates 4 and the ends of the middle cylinders 1 are fastened and fixed by the two connecting plates 4 through bolts and nuts, and the positions where the bolts are fixed are located in grooves formed by the conductive plates 10 and the connecting plates 4.

As shown in fig. 3, a support chassis 13 is fixed to one side of the bottom of the connector 3, and the support chassis 13 allows a space to be created between the reactor 2 and the ground. The supporting chassis 13 is provided with bolt holes. Specifically, as shown in fig. 1, when the connecting plate 4 is made of a non-magnetic material, the supporting chassis 13 is fixed at the bottom of the connecting plate 4 by bolts; when the connecting plate 4 is made of a magnetic conductive material, as shown in fig. 2, the supporting chassis 13 may be fixed to the supporting chassis 13 by an integral connection.

The utility model has the advantages as follows:

because the middle cylinder 1 and the connecting piece 3 do not form a closed magnetic circuit, the whole magnetic circuit is an open magnetic circuit passing through the external air, the two reactances are mutually independent and have larger inductance, the attenuation of the inductance is small under the condition of difficult saturation and large current, and the consistency of the direct current bias performance is good.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A two-way reactor is characterized in that: the method comprises the following steps:

the number of the middle columns (1) is two, and the two middle columns (1) are parallel and arranged at intervals;

the number of the reactance coils (2) is two, the number of turns and the winding direction of the two groups of the reactance coils (2) are the same and the two groups of the reactance coils are respectively wound in the middle parts of the two middle columns (1);

the connecting pieces (3) are two groups, the two groups of connecting pieces (3) are respectively connected to two ends of the two middle cylinders (1) and fix the two middle cylinders (1), and a space is reserved between each connecting piece (3) and the corresponding reactance coil (2);

the middle cylinder (1) and the connecting piece (3) form a closed ring shape structurally but do not form a closed magnetic circuit.

2. The two-way reactor according to claim 1, characterized in that: reactance coil (2) are including coil (14), last conducting strip (15) and lower conducting strip (16), go up conducting strip (15) and lower conducting strip (16) and all be on a parallel with coil (14) axial setting, and go up conducting strip (15) and set up in reactance coil (2) be close to outer lane one side, lower conducting strip (16) set up in reactance coil (2) one side that is close to the inner circle, coil (14) are basically around establishing and are fixed in between conducting strip (15) and lower conducting strip (16).

3. The two-way reactor according to claim 1, characterized in that: the connecting piece (3) comprises two connecting plates (4), and the two connecting plates (4) are respectively and fixedly connected to two opposite end faces of the end part of the middle column body (1).

4. The two-way reactor according to claim 3, characterized in that: the middle column body (1) is made of nonmagnetic materials, and the connecting plate (4) is made of magnetic conductive materials.

5. The two-way reactor according to claim 3, characterized in that: the middle column body (1) is made of a magnetic conductive material, and the connecting plate (4) is made of a non-magnetic material.

6. Two-way reactor according to claim 4 or 5, characterized in that: a plurality of separation supporting pieces (6) are arranged between the middle cylinder body (1) and the reactance coil (2), the outer wall of each separation supporting piece (6) is attached to the reactance coil (2), the inner wall of each separation supporting piece (6) is attached to the middle cylinder body (1), and a gap is formed between the middle cylinder body (1) and the reactance coil (2).

7. The two-way reactor according to claim 4, characterized in that: the connector lug (5) is electrically connected with the reactance coil (2); the outstanding current conducting plate (10) that is provided with on the outer wall of connecting plate (4), connector lug (5) laminate in on current conducting plate (10), and be provided with ribbon (11) that the cover was located current conducting plate (10) and connector lug (5) outside with fixed connector lug (5) on current conducting plate (10).

8. The two-way reactor according to claim 5, characterized in that: the connector lug (5) is electrically connected with the reactance coil (2);

the connecting plate (4) is fixed on the middle cylinder (1) through bolts, the connector lug (5) is fixed on the connecting plate (4) through bolts and connected with the connecting plate (4) and the middle cylinder (1) and the connector lug (5) and the connecting plate (4) through the same bolt.

9. The two-way reactor according to claim 1, characterized in that: the middle columns (1) are arranged in parallel along the horizontal direction or the vertical direction.

10. The two-way reactor according to claim 1, characterized in that: a supporting bottom frame (13) is fixed to one side of the bottom of the connecting piece (3), and a bolt hole is formed in the supporting bottom frame (13).