CN217881122U

CN217881122U - Photovoltaic is winding difference common mode integrative inductance immediately with flat line of heavy current for inverter

Info

Publication number: CN217881122U
Application number: CN202221909802.0U
Authority: CN
Inventors: 李光荣; 杨成
Original assignee: Guangdong Lianda Mingci Technology Co ltd
Current assignee: Guangdong Lianda Mingci Technology Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-11-22
Anticipated expiration: 2032-07-20

Abstract

The utility model discloses a photovoltaic inverter is with big current flat line immediately around integrative inductance of poor common mode, including the magnetic core group, the magnetic core group is including piling up the common mode magnetic core and the differential mode magnetic core of design from top to bottom, the winding is provided with the coil on the magnetic core group, the coil has three groups and interval distribution on the magnetic core group, the magnetic core group lower extreme is equipped with the bottom plate, be equipped with a plurality of PIN feet of being connected with coil circular telegram end on the bottom plate, the coil passes through the epoxy glue and connects and fix on magnetic core group and bottom plate, and the differential mode and the common mode of this scheme are around reaching more excellent performance under reaching littleer volume altogether, finally make this scheme can effectively reduce the inductance weight of one-third to make the inductance account for the long-pending half that can optimize of face, the electric current turns into the copper loss that the heat caused in the coil can reduce the third, can effectively save PCB wiring space to reduce the complete machine manufacturing cost of the photovoltaic inverter who is applied to this inductance.

Description

Photovoltaic inverter is with integrative inductance of big current flat wire vertical winding difference common mode

Technical Field

The utility model belongs to the technical field of the photovoltaic inverter technique and specifically relates to a photovoltaic inverter is with flat line of heavy current immediately around integrative inductance of poor common mode.

Background

Photovoltaic inverters, including domestic inverters and outdoor inverters (outdoor inverter refers to large power above KW). In the existing photovoltaic inverter circuit, the design of inductors for EMI filtering of a photovoltaic three-phase power input end is realized by adopting a mode that differential mode inductors and common mode inductors are independent, and the two inductors are connected in series on a PCB (printed circuit board).

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's not enough, the utility model provides a photovoltaic inverter is with flat line of heavy current immediately around poor common mode integrative inductance makes this scheme can effectively reduce the inductance weight of one-third, makes the inductance account for the face long-pending half that can optimize, and the copper loss can reduce the one-third, can effectively save PCB wiring space, also can satisfy CISPR simultaneously- -requirement to EMI such correlation standard to reduce the complete machine manufacturing cost who is applied to the photovoltaic inverter of this inductance.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a photovoltaic inverter is with big current flat line immediately around integrative inductance of poor common mode, includes the magnetic core group, the magnetic core group is including piling up the common mode magnetic core and the differential mode magnetic core of design from top to bottom, the winding is provided with the coil on the magnetic core group, the coil has three groups and interval distribution on the magnetic core group, the magnetic core group lower extreme is equipped with the bottom plate, be equipped with a plurality of PIN feet of being connected with coil circular telegram end on the bottom plate, the coil passes through the epoxy glue and connects to be fixed on magnetic core group and bottom plate.

As a preferred technical scheme of the utility model, constitute the design is piled up from top to bottom in the common mode magnetic core of magnetic core group and the differential mode magnetic core adoption, just common mode magnetic core and differential mode magnetic core are the rectangle.

As an optimized technical scheme of the utility model, constitute the common mode magnetic core material of magnetic core group is nanocrystalline or the high ferrite that leads of high magnetic conductivity, constitutes the material of the differential mode magnetic core of magnetic core group is silicon steel, amorphous or one of them of magnetic powder core.

As an optimal technical scheme of the utility model, the coil adopts the formula winding of winding immediately by the flat enameled wire of single strand to form, the coil is electrically conductive along controlling the direction, and thickness 1mm-5mm, width are 5mm-8mm.

As a preferred technical scheme of the utility model, the differential mode magnetic core includes two bilateral symmetry's U type magnetism core, two the U type magnetism core passes through the bandage and connects, and two U type magnetism core accessible bandage spacing adjustment makes differential mode magnetic core middle part adjustment 0.5-2.0's differential mode feel value.

Compared with the prior art, the utility model discloses the beneficial effect that can reach is:

the common mode magnetic core and the differential mode magnetic core both use rectangular shapes, the breath thickness can be adjusted in the middle of the differential mode magnetic core, and the shape of the wound coil is rectangular, so that the coil is more tightly attached to a magnetic core group, the same specification and size can be smaller, in addition, the differential mode and the common mode are wound together to achieve better performance under the condition of achieving smaller size, finally, the scheme can effectively reduce the weight of an inductor by one third, the inductor occupies one half of the area of a board and can optimize the area of the board, the copper loss caused by the fact that current in the coil is converted into heat can be reduced by one third, two independent inductors of the differential mode inductor and the common mode inductor are replaced by one differential mode inductor, the wiring space of a PCB can be effectively saved, meanwhile, the requirements of relevant standards such as CISPR14-6-3 and the like on EMI can be met, and the manufacturing cost of the whole photovoltaic inverter applied to the inductor is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic view of the present invention;

fig. 2 is a side view of the flat wire vertical winding difference common mode integrated inductor of the present invention;

fig. 3 is a front view of the flat wire vertical winding difference common mode integrated inductor of the present invention;

fig. 4 is a top view of the flat wire vertical winding difference common mode integrated inductor of the present invention;

fig. 5 is a bottom view of the flat wire vertical winding difference and common mode integrated inductor of the present invention.

Wherein: 1. a base plate; 2. a coil; 3. a common mode magnetic core; 4. a PIN PIN; 5. a differential mode magnetic core; 6. epoxy glue; 7. and the magnetic core group.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the invention easy to understand, the invention is further explained below with reference to the specific embodiments, but the following embodiments are only the preferred embodiments of the invention, not all. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Referring to fig. 1-5, the utility model provides a photovoltaic inverter is with big current flat line immediately around integrative inductance of poor common mode, including magnetic core group 7, magnetic core group is including piling up the common mode magnetic core 3 and the differential mode magnetic core 5 of design from top to bottom, the winding is provided with coil 2 on the magnetic core group 7, coil 2 has three groups and interval distribution on magnetic core group 7, realize the integrated design of differential mode and common mode inductance, the 7 lower extremes of magnetic core group are equipped with bottom plate 1, the material of bottom plate 1 is FR-4, be equipped with a plurality of PIN feet 4 of being connected with coil 2 circular telegram end on the bottom plate 1, coil 2 is fixed on magnetic core group 7 and bottom plate 1 through epoxy glue 6 connection.

Preferably, the common mode magnetic core 3 and the differential mode magnetic core 5 forming the magnetic core group 7 are in a vertical stacking design, and the common mode magnetic core 3 and the differential mode magnetic core 5 are rectangular; the rectangular magnetic core can be wound by a vertical winding machine during winding, so that the winding cost is reduced.

Preferably, the material of the common mode magnetic core 3 forming the magnetic core group 7 is nanocrystalline or ferrite with high magnetic permeability, and the material of the differential mode magnetic core 3 forming the magnetic core group 7 is one of silicon steel, amorphous or magnetic powder core.

Preferably, the coil 2 is formed by winding a single-stranded flat enameled wire in a vertical winding manner, the coil 2 is conductive in the left-right direction, the thickness is 1mm-5mm, and the width is 5mm-8mm.

Preferably, the differential mode magnetic core 5 comprises two U-shaped magnetic core bodies which are bilaterally symmetrical, the two U-shaped magnetic core bodies are connected through a binding belt, and the distance between the two U-shaped magnetic core bodies can be adjusted through the binding belt, so that the differential mode inductance value of 0.5-2.0 is adjusted in the middle of the differential mode magnetic core 5; the bandage includes along 5 external diameter winding of differential mode magnetic core, the external diameter bandage of adjustable elasticity and the spacing bandage of the fixed magnetic core of magnetic core thickness direction in edge.

Compared with the original photovoltaic inverter circuit design, the differential mode inductor and the common mode inductor are independent, the two inductors are connected in series on a PCB, the common mode magnetic core 3 and the differential mode magnetic core 5 are in a rectangular shape, the breath thickness can be adjusted in the middle of the differential mode magnetic core 5, and the wound coil 2 is in a rectangular shape (the original scheme coil is in a circular shape).

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only the preferred embodiments of the present invention, and is not intended to limit the present invention, and that there may be various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a poor common mode integrative inductance is immediately wound to flat line of heavy current for photovoltaic inverter, includes, its characterized in that: including magnetic core group (7), magnetic core group (7) are including piling up common mode magnetic core (3) and the differential mode magnetic core (5) of design from top to bottom, the winding is provided with coil (2) on magnetic core group (7), coil (2) have three groups and interval distribution on magnetic core group (7), magnetic core group (7) lower extreme is equipped with bottom plate (1), be equipped with a plurality of PIN foot (4) of being connected with coil (2) circular telegram end on bottom plate (1), coil (2) are connected through epoxy glue (6) and are fixed on magnetic core group (7) and bottom plate (1).

2. The large-current flat wire vertical winding difference common mode integrated inductor for the photovoltaic inverter as claimed in claim 1, wherein: the common mode magnetic core (3) and the differential mode magnetic core (5) of the magnetic core group (7) are designed to be stacked up and down, and the common mode magnetic core (3) and the differential mode magnetic core (5) are rectangular.

3. The large-current flat wire vertical winding difference common mode integrated inductor for the photovoltaic inverter as claimed in claim 1, wherein: the common mode magnetic core (3) forming the magnetic core group (7) is made of nanocrystalline or high-conductivity ferrite with high magnetic conductivity, and the differential mode magnetic core (5) forming the magnetic core group (7) is made of one of silicon steel, amorphous or magnetic powder core.

4. The high-current flat wire vertical winding difference common mode integrated inductor for the photovoltaic inverter according to claim 1, characterized in that: the coil (2) is formed by winding a single-stranded flat enameled wire in a vertical winding manner, the coil (2) is conductive in the left and right directions, the thickness is 1mm-5mm, and the width is 5mm-8mm.

5. The large-current flat wire vertical winding difference common mode integrated inductor for the photovoltaic inverter as claimed in claim 1, wherein: the differential mode magnetic core (5) comprises two U-shaped magnetic core bodies which are bilaterally symmetrical, the two U-shaped magnetic core bodies are connected through a binding belt, and the distance between the two U-shaped magnetic core bodies can be adjusted through the binding belt, so that the differential mode inductance value of 0.5-2.0 is adjusted in the middle of the differential mode magnetic core (5).