CN206558349U

CN206558349U - A kind of parallel reactor of three-phase and current transformer

Info

Publication number: CN206558349U
Application number: CN201720143916.1U
Authority: CN
Inventors: 姜圳; 喻俊鹏; 黄欢; 刘彬
Original assignee: Shenzhen Hopewind Electric Co Ltd
Current assignee: Shenzhen Hopewind Electric Co Ltd
Priority date: 2017-02-17
Filing date: 2017-02-17
Publication date: 2017-10-13
Anticipated expiration: 2027-02-17

Abstract

The utility model discloses a kind of parallel reactor of three-phase and current transformer, the parallel reactor of the three-phase includes N groups magnetic core, six vertical iron yokes and 3N winding, and every group of magnetic core includes three iron core columns iron yoke parallel with two, wherein N >=2；Wherein, six vertical iron yokes are connected with every group of magnetic core；Three iron core columns are disposed side by side between two parallel iron yokes, and a winding is all arranged with each iron core column.The parallel reactor of three-phase disclosed in the utility model and current transformer, compared with five post scheme inductance, single winding differential mode sensibility reciprocal does not change, but common mode magnetic circuit is longer than differential mode magnetic circuit, common mode sensibility reciprocal is relatively large, the iron core column and iron yoke of reactor are reduced, and can save installing space, can effectively reduce cost.

Description

A kind of parallel reactor of three-phase and current transformer

Technical field

The utility model is related to converter topology field, more particularly to a kind of parallel reactor of three-phase and current transformer.

Background technology

In wind electric converter, existing scheme generally reduces mains by harmonics electric current using LC or LCL filter, but should Scheme easily causes the generation of wind field resonance accident.

For wind field resonance problems, offset by phase-shifting carrier wave shunt chopper mains by harmonics, reduce and even take Disappear ac filter electric capacity, so as to fundamentally solve the problem.

However, phase-shifting carrier wave can produce common-mode voltage between shunt chopper, and existing three-phase three-column reactor without Common mode inhibition capacity, easily causes great circulation, therefore, more than prior art using three-phase and five-pole reactance or three-phase and four-pole reactance come Common code impedance needed for providing, so as to reduce circulation.But not only volume is big for the reactor of the use program, cost is also higher.

Utility model content

Main purpose of the present utility model is to propose a kind of parallel reactor of three-phase and current transformer, it is intended to solve existing skill The technical problem that art is present.

To achieve the above object, the utility model embodiment first aspect provides a kind of parallel reactor of three-phase, described three Mutually parallel reactor includes N groups magnetic core, six vertical iron yokes and 3N winding, and every group of magnetic core includes three iron core columns and two flat Row iron yoke, wherein N >=2；

Wherein, described six vertical iron yokes are connected with every group of magnetic core；

Three iron core columns are disposed side by side between two parallel iron yokes, and one is all arranged with each iron core column Winding.

Further, the vertical iron yoke is arranged between the parallel iron yoke and the iron core column；Or it is described parallel Iron yoke is arranged between the vertical iron yoke and the iron core column.

Further, the iron core column is provided with air gap.

Further, the material of the iron core column, the parallel iron yoke and the vertical iron yoke is free of air gap for inside Magnetic material.

Further, magnetic material of the inside without air gap is specially silicon steel sheet, ferrite, non-crystalline material or crystallite Material.

In addition, to achieve the above object, the utility model embodiment second aspect provides a kind of current transformer, including it is N number of simultaneously The power model of connection, the current transformer also includes the parallel reactor of three-phase for being concatenated into the power model output end；The three-phase Parallel reactor includes N groups magnetic core, six vertical iron yokes and 3N winding, and it is parallel with two that every group of magnetic core includes three iron core columns Iron yoke, wherein N >=2；

Further, the iron core column is provided with air gap.

The parallel reactor of three-phase and current transformer that the utility model embodiment is provided, it is single compared with five post scheme inductance Winding differential mode sensibility reciprocal does not change, but common mode magnetic circuit is longer than differential mode magnetic circuit, and common mode sensibility reciprocal is relatively large, the iron core column of reactor and Iron yoke is reduced, and can save installing space, can effectively reduce cost.

Brief description of the drawings

Fig. 1 is the parallel reactor schematic diagram of three-phase of the utility model embodiment；

Fig. 2 is another structural representation of the parallel reactor of three-phase of the utility model embodiment；

Fig. 3 is the converter structure schematic diagram of the utility model embodiment；

Fig. 4 is the magnetic field structure schematic diagram of the parallel reactor of three-phase of the utility model embodiment；

Fig. 5 is another magnetic field structure schematic diagram of the parallel reactor of three-phase of the utility model embodiment.

Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.

Embodiment

It should be appreciated that specific embodiment described herein is not used to limit this only to explain the utility model Utility model.

Each embodiment of the utility model is realized referring now to accompanying drawing description.In follow-up description, using for The suffix of such as " module ", " part " or " unit " of element is represented only for being conducive to explanation of the present utility model, itself Not specific meaning.

The description for being related to " first ", " second " etc. in the utility model is only used for describing purpose, and it is not intended that referring to Show or imply its relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " are defined At least one this feature can be expressed or be implicitly included to two " feature.In addition, the technical scheme between each embodiment can To be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical scheme occurs It is conflicting or when can not realize it will be understood that the combination of this technical scheme is not present, also not in the guarantor of the utility model requirement Within the scope of shield.

As shown in figure 1, the utility model first embodiment proposes a kind of parallel reactor of three-phase, including two groups of magnetic cores, six Individual vertical iron yoke and two groups of three-phase windings, specifically, the parallel reactor of the three-phase include first group of magnetic core 10, second group of magnetic core 11st, six vertical iron yokes 12 and six windings 103, first group of magnetic core 10 include three iron core columns 101 iron yoke parallel with two 102.Second group of magnetic core 11 is similar with the structure of first group of magnetic core 10.Six windings 103 constitute two groups of three-phase windings.

Wherein, six vertical iron yokes 12 are connected with first group of magnetic core 10 and second group of magnetic core 11.Specifically, three vertical iron Yoke 12 is arranged between parallel iron yoke 102 and iron core column 101, and the vertical iron yoke 12 of the other three is similarly disposed at parallel iron yoke 102 Between iron core column 101.

It refer to shown in Fig. 2, in another embodiment, parallel iron yoke 102 is arranged on vertical iron yoke 12 and iron core column 101 Between, another parallel iron yoke 102 is similarly disposed between vertical iron yoke 12 and iron core column 101.

Three iron core columns 101 are disposed side by side between two parallel iron yokes 102, are set in day character form structure, every group of three-phase Winding is around in three iron core columns of the magnetic core respectively, i.e., be all arranged with a winding 103 in each iron core column 101.Two Parallel iron yoke 102 be arranged in parallel.

In the present embodiment, iron core column 101 is provided with air gap.

In the present embodiment, the material of iron core column 101, parallel iron yoke 102 and vertical iron yoke 12 is free of air gap for inside Magnetic material.Magnetic material concretely silicon steel sheet, ferrite, non-crystalline material or micro crystal material of the inside without air gap.

Go out the situation of the parallel reactor of the post of three-phase six it should be noted that Fig. 1 is example, it is envisaged that ground, three-phase nine The parallel reactor of post, the parallel reactor of the post of three-phase 12 structure similarly.For example：The parallel reactor of the post of three-phase nine is relative For the parallel reactor of the post of three-phase six, many one group of magnetic cores, by taking Fig. 1 as an example, many magnetic cores may be provided at first group of magnetic core 10 Between second group of magnetic core 11, other structures part is still constant.

Reference picture 3, a kind of current transformer that Fig. 3 proposes for the utility model second embodiment, including N number of power mould in parallel Block 20.In the present embodiment, power model 20 can be three-phase inverter.

The current transformer also includes the parallel reactor 21 of three-phase for being concatenated into the output end of power model 20；Three-phase reactor 21 is wrapped Include N groups magnetic core, six vertical iron yokes and 3N winding, every group of magnetic core includes three iron core columns iron yoke parallel with two, wherein N >= 2。

Wherein, six vertical iron yokes are connected with N group magnetic cores.Specifically, three vertical iron yokes are arranged on parallel iron yoke and iron Between stem, the vertical iron yoke of the other three is similarly disposed between parallel iron yoke and iron core column.

In another embodiment, parallel iron yoke 102 is arranged between vertical iron yoke 12 and iron core column 101, another Parallel iron yoke 102 is similarly disposed between vertical iron yoke 12 and iron core column 101.

Three iron core columns are disposed side by side between two parallel iron yokes, are set in day character form structure, every group of three-phase windings point It is not around in three iron core columns of the magnetic core, i.e., a winding is all arranged with each iron core column.Two parallel iron yokes are parallel Set.

In the present embodiment, iron core column is provided with air gap.

In the present embodiment, the material of iron core column, parallel iron yoke and vertical iron yoke is the internal magnetic material for being free of air gap. Magnetic material concretely silicon steel sheet, ferrite, non-crystalline material or micro crystal material of the inside without air gap.

It please check shown in Fig. 4 and Fig. 5, by taking N=2 as an example, shunt chopper phase-shifting carrier wave angle is 360/N=180 °, right For every group of inverter, inverter current is divided into two parts：Differential-mode current and common mode circulation.

Because every group of inverter differential-mode current three-phase sum is zero, corresponding iron yoke magnetic field sum is zero, now three-phase six The parallel reactance of post is equal to two paralleling three-phase three-column reactance, and compared with three-phase and five-pole reactance, differential mode sensibility reciprocal does not become Change, as shown in Figure 4.

Common mode circulation between shunt chopper always flows into another place's outflow at one, flow into where winding three of electric current The magnetic direction that the magnetic direction that iron core column is produced is produced with three iron core columns where electric current outflow winding is on the contrary, so that electricity It is anti-to be provided with common mode inhibition capacity, as shown in Figure 5.Even if not opening air gap between parallel iron yoke and vertical iron yoke, common mode magnetic circuit is long In differential mode magnetic circuit, compared to five post schemes, common mode sensibility reciprocal is also than larger, if opened after air gap, common mode sensibility reciprocal is bigger.

In addition, the parallel reactance of the post of three-phase six reduces four iron core columns and part iron yoke compared with two three-phase and five-pole reactance, And part installing space is saved, therefore, it is possible to effectively reduce cost.

It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row His property is included, so that process, method, article or device including a series of key elements not only include those key elements, and And also including other key elements being not expressly set out, or also include for this process, method, article or device institute inherently Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this Also there is other identical element in process, method, article or the device of key element.

Preferred embodiment of the present utility model is these are only, the scope of the claims of the present utility model is not thereby limited, it is every The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in Other related technical fields, are similarly included in scope of patent protection of the present utility model.

Claims

1. a kind of parallel reactor of three-phase, it is characterised in that the parallel reactor of three-phase includes N groups magnetic core, six vertical iron Yoke and 3N winding, every group of magnetic core include three iron core columns iron yoke parallel with two, wherein N >=2；

Three iron core columns are disposed side by side between two parallel iron yokes, be all arranged with each iron core column one around Group.

2. the parallel reactor of a kind of three-phase according to claim 1, it is characterised in that the vertical iron yoke is arranged on described Between parallel iron yoke and the iron core column；Or the parallel iron yoke is arranged between the vertical iron yoke and the iron core column.

3. the parallel reactor of a kind of three-phase according to claim 1, it is characterised in that the iron core column is provided with air gap.

4. according to a kind of any described parallel reactors of three-phase of claim 1-3, it is characterised in that the iron core column, described The material of parallel iron yoke and the vertical iron yoke is the internal magnetic material for being free of air gap.

5. the parallel reactor of a kind of three-phase according to claim 4, it is characterised in that the inside is free of the magnetic of air gap Material is specially silicon steel sheet, ferrite, non-crystalline material or micro crystal material.

6. a kind of current transformer, including N number of power model in parallel, it is characterised in that：The current transformer also includes being concatenated into the work( The parallel reactor of three-phase of rate module output end；The parallel reactor of three-phase includes N groups magnetic core, six vertical iron yokes and 3N Winding, every group of magnetic core includes three iron core columns iron yoke parallel with two, wherein N >=2；

7. a kind of current transformer according to claim 6, it is characterised in that the vertical iron yoke is arranged on the parallel iron yoke Between the iron core column；Or the parallel iron yoke is arranged between the vertical iron yoke and the iron core column.

8. a kind of current transformer according to claim 6, it is characterised in that the iron core column is provided with air gap.

9. according to a kind of any described current transformers of claim 6-8, it is characterised in that the iron core column, the parallel iron yoke Material with the vertical iron yoke is the internal magnetic material for being free of air gap.

10. a kind of current transformer according to claim 9, it is characterised in that magnetic material of the inside without air gap has Body is silicon steel sheet, ferrite, non-crystalline material or micro crystal material.