CN203552879U

CN203552879U - Magnetic core structure of electric reactor

Info

Publication number: CN203552879U
Application number: CN201320726721.1U
Authority: CN
Inventors: 赵宜泰
Original assignee: Individual
Current assignee: Kunshan Maji Electronics Co ltd
Priority date: 2013-11-18
Filing date: 2013-11-18
Publication date: 2014-04-16
Anticipated expiration: 2023-11-18

Abstract

The utility model discloses a magnetic core structure of an electric reactor. The magnetic core structure comprises two first iron cores and two second iron cores. The two first iron cores are made of iron-based nanocrystalline alloy and are in a U shape, a rectangular body is arranged on each first iron core, the two ends of each body are bent to form two symmetric bent sections, and the bent sections are respectively provided with an end face. The two second iron cores are made of iron silicon aluminum alloy, a column is arranged on each second iron core, and the two ends of the each column are respectively provided with an end portion. The length of the two second iron cores is smaller than that of the bent sections of the first iron cores, the two end portions of the two second iron cores and the two end faces of the two first iron cores correspond and are assembled to form the magnetic core structure, the magnetic core structure is formed by combining different materials, and iron losses and the number of turns of winding coils can be reduced, so that the internal resistance value of the electric reactor is reduced, and copper losses are reduced.

Description

The core structure of reactor

Technical field

The utility model relates to a kind of reactor, espespecially a kind of magnetic core structure-improved for the reactor in AC power.

Background technology

Reactor is also inductor, reactance is divided into induction reactance and capacitive reactance, relatively the classification of science is that impedor (inductor) and capacitive reactance device (capacitor) are referred to as reactor, but because first there has been inductor in the past, and by appellation reactor, so the said capacitor of people is exactly capacitive reactance device now, and reactor specially refers to inductor.

When electric power system is short-circuited, can produce the short circuit current that numerical value is very large.If do not limited, keep electric equipment dynamic stability and thermally-stabilised be very difficult.Therefore,, in order to meet the requirement of some circuit breaker interrupting capacity, the wire-outgoing breaker place series reactor of being everlasting, increases short-circuit impedance, limiting short-circuit current.

Owing to having adopted reactor, when being short-circuited, the voltage on reactor is larger by force, so also played the effect that maintains busbar voltage level, makes the voltage fluctuation on bus less, has guaranteed the stability of the user's electric equipment operation on non-fault line.

Traditional reactor combination, it is mainly the iron core with a manganese-zinc ferrite or the made U-shaped of iron sial, again the iron core of two U-shapeds is formed to a core structure, this core structure and the drum stand that is wound with coil are combined into a reactor, this kind of reactor in use, iron loss is 46W, and copper loss is 41.25W.

Alternative reactor is to make a ring-like core structure with a manganese-zinc ferrite or iron sial equally, be to make a layer insulating on this ring-like core structure, on this ring-like core structure, be wound around a coil again, to form a ring-like reactor, this reactor in use iron loss is 13.89W, and copper loss is 41.25W.

Because reactor is in use during power transmission, can produce the magnetic line of force, and these magnetic lines of force can run in iron core the inside, iron core has magnetic resistance, can generate heat, and heat is exactly to lose.Although iron core is very thin, always go back some thickness, so how many magnetic lines of force, in the race of iron core the inside, can turn, the circle of looping, be just eddy current, be also loss.The magnetic line of force runs in iron core the inside, and iron core has magnetic resistance, can allow the magnetic line of force slow down, and is exactly magnetic hysteresis, is also loss.Square being directly proportional of iron loss and eddy current loss, magnetic hysteresis loss, during non-transformer, without iron loss.Copper loss, when electric current is flowed through enamel covered wire, enamel covered wire has resistance, can generate heat, and heat is exactly loss.Copper loss is directly proportional to current squaring, during no-load current, without copper loss.Therefore, iron loss and copper loss are too high will reduce reactor self character and useful life.

Utility model content

In view of this, the technical problems to be solved in the utility model is to provide a kind of core structure of reactor, can reduce iron loss and copper loss.

For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that

A core structure for reactor, this core structure comprises: 2 first iron cores, the material of these 2 first iron cores is iron-base nanometer crystal alloy, and be U font, on it, have a main body, two ends of this main body are respectively bent with two symmetrical bending segments, respectively have an end face on this bending segment; 2 second iron cores, the material of these 2 second iron cores is sendust, has a cylinder on it, on two ends of this cylinder, respectively has an end; Wherein, the length of these the 2 second iron cores bending segment of this first iron core is short, and two ends of this 2 second iron core connect biend group that should 2 first iron cores, and is formed with an air gap between two ends and biend.

As preferred version, this 2 first iron core is reeled and is formed by the iron-base nanometer crystal alloy of plates.

As preferred version, the main body of these 2 first iron cores is rectangle.

As preferred version, the cylinder of these 2 second iron cores is rectangle.

As preferred version, the magnetic permeability mu of these 2 second iron cores is 125.

As preferred version, more include a pad, this pad is seated in this air gap.

As preferred version, this pad is non-conductive material.

As preferred version, on the surface of this 2 first iron core and these 2 second iron cores, respectively there is an insulating barrier.

As preferred version, the iron loss of the core structure that this 2 first iron core and this 2 second iron core form is 10.45W.

As preferred version, the copper loss of the core structure that this 2 first iron core and this 2 second iron core form is 15.53W.

As preferred version, the internal resistance value of this reactor is 20.7mhom.

As preferred version, more include two drum stands, this drum stand is placed on this 2 second iron core.

The technique effect that the utility model reaches is as follows: the core structure of the utility model reactor, with different combinations of materials, become, and can reduce iron loss and reduce the coil winding number of turns, can make the internal resistance value of reactor reduce, can reduce copper loss.

Accompanying drawing explanation

Fig. 1 is the first coiling iron core schematic diagram of the present utility model;

Fig. 2 is that the first iron core of the present utility model cuts schematic diagram;

Fig. 3 is the second iron core schematic appearance of the present utility model;

Fig. 4 is the combination schematic diagram of two the first iron cores of the present utility model and two the second iron cores;

Fig. 5 is the schematic side view of Fig. 4;

Fig. 6 is the combination schematic diagram of another embodiment of the present utility model;

Fig. 7 is the schematic side view of Fig. 6;

Fig. 8 is the section cross-sectional schematic that the second iron core sleeve of the present utility model is provided with drum stand.

[symbol description]

The first iron core 1

Main body 11

Bending segment 12

End face 13

The second iron core 2

Cylinder 21

End 22

Air gap 3

Pad 4

Drum stand 5

Body 51

Ora terminalis 52

Chamfering 53

Coil 6.

Embodiment

Relevant the technical content and a detailed description of the present utility model, coordinate graphic being described as follows now:

Refer to Fig. 1 ~ Fig. 3, for the first coiling iron core of the present utility model, cut and the second iron core schematic appearance.As shown in the figure: the core structure of the utility model reactor, this core structure comprises: the first iron core 1 and the second iron core 2.

This first iron core 1, for iron-base nanometer crystal alloy (Nanocrystal), this iron-base nanometer crystal alloy is comprised of iron, silicon, boron and a small amount of copper, molybdenum, niobium etc., and process technique is made into plates by this iron-base nanometer crystal alloy, the iron-base nanometer crystal alloy of these plates is being wound into this first iron core 1.After this first iron core 1 has been reeled, this first iron core 1 is cut into the first iron core 1 of two U fonts, on this first iron core 1, have a rectangular main body 11, two ends of this main body 11 are respectively bent with two symmetrical bending segments 12, respectively have an end face 13 on this bending segment 12.

This second iron core 2, with sendust powder (sendust), utilizes thermosetting or compact technique that iron sial powder compaction is made into after a rectangular cylinder 21, then with sintering technology sintering, forms the structure of this second iron core 2.On two ends of the cylinder 21 of this second iron core 2, respectively there is an end 22.In this is graphic, the length of this second iron core 2 bending segment 12 of this first iron core 1 is short, and utilizes sintering technology, makes magnetic permeability mu=125.

Referring to Fig. 4 and Fig. 5, is two the first iron cores of the present utility model and the combination of two the second iron cores and the schematic side view of Fig. 4.As shown in the figure: after the first iron core 1 of the present utility model and the second iron core 2 complete, with transparent or nontransparent insulating varnish, coat on the surface of this first iron core 1 and this second iron core 2, make the surface of this first iron core 1 and this second iron core 2 be formed with an insulating barrier (not shown), this insulating barrier can be for being wound around the coil (not shown) being coiled into by copper cash on this second iron core 2.

While again two the first iron cores 1 and two the second iron cores 2 being combined into core structure, biend 13 by two ends 22 of the cylinder of these 2 second iron cores 2 21 to body that should 2 first iron cores 1, and between two ends 22 and biend 13, be formed with an air gap 3, in this air gap 3, can put the pad 4 of non-conductive material, to control air gap 3 sizes, can control the magnetic saturation state of reactor, in this is graphic, this air gap 3 is 0.5mm.

When the second iron core 2 of making at above-mentioned the first iron core 1 made from this iron-base nanometer crystal alloy and this iron sial is combined into the core structure of reactor, can reduce the coil winding number of turns, making internal resistance value is 20.7mohm, and iron loss is 10.45W, and copper loss is 15.53W.The core structure that hence one can see that is combined into two kinds of different materials can significantly reduce copper loss.

Referring to Fig. 6 and Fig. 7, is the combination of another embodiment of the present utility model and the schematic side view of Fig. 6.As shown in the figure: at the first iron core 1 of the present utility model and this second iron core 2, be combined into before core structure, each cover on this 2 second iron core 2 can be had to a drum stand (bobbin) 5, this drum stand 5 has the rectangular body 51 of a hollow, respectively has an ora terminalis 52 on two ends of this body 51.

When the body 51 of this drum stand 5 is being placed on this 2 second iron core 2, can winding around 6 on the body 51 of this drum stand 5.When the second iron core 2 of making due to the first iron core 1 made from this iron-base nanometer crystal alloy and this iron sial is combined into the core structure of reactor, can reduce coil 6 number of turns that are wound on this drum stand 5, making internal resistance value is 20.7mohm, and iron loss is 10.45W, and copper loss is 15.53W.The core structure that hence one can see that is combined into two kinds of different materials can significantly reduce copper loss.

Further, refer to Fig. 8, for the second iron core sleeve of the present utility model is provided with the section cross-sectional schematic of drum stand.As shown in the figure: when this drum stand 5 is placed on this second iron core 2 outer surface, can on the body of this drum stand 5 51, be wound around copper cash and forms coil 6.While being 1mm due to the thickness of this drum stand 5, therefore the length 53 of the chamfering on this drum stand 3 is 1mm, and after winding around 6, the desirable 1mm of this chamfering 53 controls winding turns.

The above, be only preferred embodiment of the present utility model, is not intended to limit protection range of the present utility model.

Claims

1. a core structure for reactor, is characterized in that, this core structure comprises:

2 first iron cores, the material of these 2 first iron cores is iron-base nanometer crystal alloy, and is U font, has a main body on it, two ends of this main body are respectively bent with two symmetrical bending segments, respectively have an end face on this bending segment;

2 second iron cores, the material of these 2 second iron cores is sendust, has a cylinder on it, on two ends of this cylinder, respectively has an end;

Wherein, the length of these the 2 second iron cores bending segment of this first iron core is short, and two ends of this 2 second iron core connect biend group that should 2 first iron cores, and is formed with an air gap between two ends and biend.

2. the core structure of reactor according to claim 1, is characterized in that, this 2 first iron core is reeled and formed by the iron-base nanometer crystal alloy of plates.

3. the core structure of reactor according to claim 2, is characterized in that, the main body of these 2 first iron cores is rectangle.

4. the core structure of reactor according to claim 3, is characterized in that, the cylinder of these 2 second iron cores is rectangle.

5. the core structure of reactor according to claim 4, is characterized in that, the magnetic permeability mu of these 2 second iron cores is 125.

6. the core structure of reactor according to claim 5, is characterized in that, more includes a pad, and this pad is seated in this air gap.

7. the core structure of reactor according to claim 6, is characterized in that, this pad is non-conductive material.

8. the core structure of reactor according to claim 7, is characterized in that, on the surface of this 2 first iron core and these 2 second iron cores, respectively has an insulating barrier.

9. the core structure of reactor according to claim 8, is characterized in that, the iron loss of the core structure that this 2 first iron core and this 2 second iron core form is 10.45W.

10. the core structure of reactor according to claim 9, is characterized in that, the copper loss of the core structure that this 2 first iron core and this 2 second iron core form is 15.53W.

The core structure of 11. reactors according to claim 10, is characterized in that, the internal resistance value of this reactor is 20.7mhom.

The core structure of 12. reactors according to claim 11, is characterized in that, more includes two drum stands, and this drum stand is placed on this 2 second iron core.