CN211604884U

CN211604884U - Novel magnetic integrated reactor

Info

Publication number: CN211604884U
Application number: CN201921740832.1U
Authority: CN
Inventors: 李福元; 仇亮安; 李宾; 胡维生
Original assignee: Shinenergy Technology Shanghai Co ltd
Current assignee: Shinenergy Technology Shanghai Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-09-29
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a novel magnetic integrated reactor, which comprises three core columns with air gaps, an upper yoke and a lower yoke, wherein the upper ends and the lower ends of the three core columns with air gaps are connected, and the upper yoke and the lower yoke are respectively clamped by a pair of upper clamping pieces, a pair of lower clamping pieces and a plurality of upper penetrating fastening screws and a plurality of lower penetrating fastening screws; the upper clamping piece and the corresponding lower clamping piece are connected through a plurality of pull screw rods; each core column with air gaps is provided with a coil, each coil is provided with an upper outlet line row and a lower outlet line row, the winding mechanism further comprises an air-gap-free side column, the air-gap-free side column is connected with an upper yoke and a lower yoke through a clamping piece, three core columns with air gaps are arranged on one side of the air-gap-free side column, all the core columns with air gaps are parallel to the side column, and the upper yoke is parallel to the lower yoke. The utility model discloses net side filter circuit among mainly used three-phase photovoltaic inverter, differential mode and common mode current among the suppression system.

Description

Novel magnetic integrated reactor

Technical Field

The utility model relates to a parallelly connected technical field of high-power photovoltaic inverter complete machine, in particular to altogether differential mode reactor.

Background

The scheme that the whole high-power photovoltaic inverters applied to the current market are connected in parallel and then connected to the grid is achieved, a key problem needs to be solved, namely, common mode current is generated between two devices after the two devices are connected in parallel due to errors of a control system and a power tube, the common mode current does not have a common mode filtering function because only differential mode filtering (LC filtering, wherein L is a three-phase three-column reactor) is arranged at the rear end of the inverter, and loss of power devices (the power tube and the differential mode reactor) is increased after the common mode current is generated. The disadvantages of these two solutions are as follows:

1. the cost is high. Compared with the common double-group transformer, the cost of the double-split transformer is higher by more than 10%, and the cost of the balance reactor is increased by more than 10% as well

2. Large volume and complex system. The double-split transformer has requirements on the distance between two input windings so as to ensure that the leakage inductance between the two windings meets the requirements, and the balance reactor needs an independent box body and space, so the volumes of the two schemes are large, and the complexity of the system is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem lie in to the parallelly connected back scheme of being incorporated into the power networks again of high-power photovoltaic inverter complete machine, provide a novel integrated reactor of magnetism, this novel integrated reactor of magnetism possesses differential mode filtering and common mode filtering function simultaneously for the rear end is incorporated into the power networks and only needs ordinary bifilar transformer, has cancelled balance reactor or two split transformers.

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

a novel magnetic integrated reactor comprises three core columns with air gaps, an upper yoke and a lower yoke, wherein the upper yoke is clamped by a pair of upper clamping pieces and a plurality of upper penetrating fastening screws, and the pair of upper clamping pieces are connected by a plurality of upper pressing plates; the lower yoke is clamped by a pair of lower clamping pieces and a plurality of lower penetrating fastening screws, and the pair of lower clamping pieces are connected by a plurality of bottom feet; the upper clamping piece and the corresponding lower clamping piece are connected through a plurality of pull screw rods; the winding device is characterized by further comprising an air-gap-free side column, wherein the upper end and the lower end of the air-gap-free side column are connected with the upper yoke and the lower yoke through a pair of clamping pieces, all the core columns with air gaps are parallel to the air-gap-free side column, and the upper yoke is parallel to the lower yoke.

In a preferred embodiment of the present invention, the widths of the upper yoke, the lower yoke and the non-air-gap side column are 0.5-1 times the width of the air-gap core column.

In a preferred embodiment of the invention, the coil is a foil/wire wound or edgewound coil.

The utility model discloses the parallelly connected technical field of mainly used high-power photovoltaic inverter complete machine, in particular to altogether differential mode reactor.

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

1. the cost is low: compared with a double-split transformer, the cost of the common double-winding transformer is reduced by 10% or more;

2. the loss is low: connecting wires and windings are reduced, and the comprehensive efficiency can be improved by 0.05% or more;

3. the reliability is high: the number of windings or balance reactors is reduced, namely devices are reduced, and the reliability is improved by 10% or more.

Drawings

Fig. 1 is a front view of the magnetic integrated reactor of the present invention.

Fig. 2 is the utility model discloses magnetism integrated reactor left side view.

Fig. 3 is a top view of the magnetic integrated reactor of the present invention.

Fig. 4 is a three-dimensional diagram (axonometric diagram) of the magnetic integrated reactor of the present invention.

Fig. 5 is a schematic diagram of the iron core of the magnetic integrated reactor of the present invention.

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 5, the novel magnetically integrated reactor shown in the figures comprises three air-gapped

core legs

5a, 5b, 5c, wherein the upper ends of the three air-gapped

core legs

5a, 5b, 5c are connected together by an upper yoke 10, the upper yoke 10 is clamped by a pair of

upper clamping pieces

7a, 7b and a plurality of upper piercing fastening screws 2a, and the pair of

upper clamping pieces

7a, 7b are connected together by a plurality of upper pressing plates 8.

The lower ends of the three air-

gap legs

5a, 5b, 5c are connected by a lower yoke 11, the lower yoke 11 is clamped by a pair of

lower clamping pieces

3a, 3b and a plurality of lower through fastening screws 2b, and the pair of

lower clamping pieces

3a, 3b are connected by a plurality of feet 1.

The upper clamping piece 7a is connected with the corresponding lower clamping piece 3a through a plurality of pull screw rods 9 a; the upper clamping piece 7b and the corresponding lower clamping piece 3b are connected through a plurality of pull screw rods 9 b.

A

coil

12a, 12b, 12c is mounted on each air-gapped

leg

5a, 5b, 5c, and each

coil

12a, 12b, 12c is provided with an upper outlet row 6 and a lower outlet row 4. Each

coil

12a, 12b, 12c is a foil-wound coil or a wire-wound coil or a vertically wound coil.

The utility model is characterized in that, still include one or not air gap side post 13, one or not air gap side post 13 couples together through a pair of folder 14 and upper yoke 10, lower yoke 11, is provided with three

stem stems

5a, 5b, 5c of taking the air gap on one side of one or not air gap side post 13, and all stem stems 5a, 5b, 5c of taking the air gap are parallel to each other with side post 13. The upper yoke 10 and the lower yoke 11 are parallel to each other.

The widths 13 of the upper yoke 10, the lower yoke 11 and the non-air-gap side column are all 0.5-1 times the widths of the air-

gap core columns

5a, 5b and 5 c.

The utility model discloses net side filter circuit among mainly used three-phase photovoltaic inverter, differential mode and common mode current among the suppression system.

Claims

1. A novel magnetic integrated reactor has the functions of differential mode filtering and common mode filtering simultaneously, and comprises three core columns with air gaps, an upper yoke and a lower yoke, wherein the upper yoke is clamped by a pair of upper clamping pieces and a plurality of upper penetrating fastening screws, and the pair of upper clamping pieces are connected by a plurality of upper pressing plates; the lower yoke is clamped by a pair of lower clamping pieces and a plurality of lower penetrating fastening screws, and the pair of lower clamping pieces are connected by a plurality of bottom feet; the upper clamping piece and the corresponding lower clamping piece are connected through a plurality of pull screw rods; the winding device is characterized by further comprising an air-gap-free side column, wherein the upper end and the lower end of the air-gap-free side column are connected with the upper yoke and the lower yoke through a pair of clamping pieces, all the core columns with air gaps are parallel to the air-gap-free side column, and the upper yoke is parallel to the lower yoke.

2. The novel magnetic integrated reactor according to claim 1, characterized in that the widths of the upper yoke, the lower yoke and the non-air-gap side column are all 0.5-1 times the width of the air-gap core column.

3. A novel magnetically integrated reactor according to claim 1, wherein said coil is a foil-wound coil or a wire-wound coil or a vertically wound coil.