CN209843460U - Output filter inductor of high-power inverter system - Google Patents
Output filter inductor of high-power inverter system Download PDFInfo
- Publication number
- CN209843460U CN209843460U CN201921060339.5U CN201921060339U CN209843460U CN 209843460 U CN209843460 U CN 209843460U CN 201921060339 U CN201921060339 U CN 201921060339U CN 209843460 U CN209843460 U CN 209843460U
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- China
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- coil
- iron core
- group
- inverter system
- output filter
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 61
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 31
- 239000010949 copper Substances 0.000 claims description 31
- 229910052802 copper Inorganic materials 0.000 claims description 31
- 238000004804 winding Methods 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 229910000976 Electrical steel Inorganic materials 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 3
- 230000005291 magnetic effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Inverter Devices (AREA)
Abstract
The utility model discloses an output filter inductor of a high-power inverter system, which comprises a coil group and an iron core group; the coil assembly comprises a first coil and a second coil; the iron core group comprises a first iron core and a second iron core; the first iron core and the second iron core are of C-shaped structures and are embedded in the coil group oppositely, and compared with traditional silicon steel laminated products and powder blocky products, the integral assembly of the products is easier; the first coil and the second coil are arranged in parallel, so that a product can bear larger current and is easy to manufacture; the first coil and the second coil are transversely arranged and overlapped along the height direction; the second coil is arranged above the first coil; the downward side of the first coil is provided with a base in an attaching manner; therefore, the overall installation height of a product can be reduced, meanwhile, the upper plane of the base is fully contacted with the outer plane of the coil, the temperature dissipation of the coil is facilitated, the temperature rise is reduced, and the operation stability is further improved; while reducing core eddy current losses.
Description
Technical Field
The utility model relates to an inductance field especially relates to a high-power inverter system output filter inductance.
Background
With the continuous development of new energy and the popularization of distributed power generation systems, inverter systems as their core technologies are beginning to attract attention. Due to the inherent characteristics of the inverter system, the output voltage of the inverter system contains more higher harmonic components. The main circuits of the grid-connected inverter system and the conventional inverter usually work in the SPWM working mode, and the output end of the grid-connected inverter system and the conventional inverter needs to be provided with a filter inductor to filter out higher harmonics of the current injected into the grid or the motor. From the circuit structure, the filter inductor is connected in series in the main circuit, and the output current of the inverter flows through the filter inductor, so that the filter inductor has great influence on the harmonic content of the output current of the inverter system. Therefore, the reasonable design of the filter inductor is an important guarantee for improving the efficiency of the inverter system and reducing the harmonic content of the output current. Meanwhile, as the inverter system is developed to high frequency, the traditional low-frequency filter inductance is limited by frequency, and the requirements of the existing inverter technology cannot be met. For a low-power high-frequency inversion system, most of output filter inductance magnetic materials adopt a ferrum-silicon-aluminum magnetic ring, although the ferrum-silicon-aluminum magnetic ring has many advantages as the output filter inductance of the inversion system, the power borne by the ferrum-silicon-aluminum maximum magnetic ring is only a few kilowatts at present, and the filtering requirement of the high-power inversion system cannot be met. Therefore, it is necessary to invent a high-power inverter system output filter inductor with strong current bearing capacity, stable inductance value and low loss.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the deficiencies in the prior art, the utility model provides a current bearing capacity is strong, steady value of feeling, the high-power inverter system output filter inductance of low-loss.
The technical scheme is as follows: in order to achieve the above object, the present invention provides an output filter inductor for a high power inverter system, which includes a winding assembly and an iron core assembly; the coil assembly comprises a first coil and a second coil; the iron core group comprises a first iron core and a second iron core; the first iron core and the second iron core are both of C-shaped structures and are embedded in the coil group oppositely; the first coil and the second coil are arranged in parallel; the first coil and the second coil are transversely arranged and vertically overlapped; the second coil is arranged above the first coil; the first coil is provided with the base in the laminating of one side down.
Furthermore, an air gap sheet is clamped between the first iron core and the second iron core; insulation plates are respectively arranged inside the first iron core and the second iron core; one side of the insulating plate, which is back to the corresponding iron core, is attached to the coil group.
Furthermore, a concave round corner structure is arranged at the inner side turning part of the first iron core and the second iron core.
Furthermore, the first coil and the second coil are wound by double-layer copper strips, and insulating frameworks are respectively arranged inside the first coil and the second coil; the outer surface of the first coil is coated with insulating paper; the starting position of the copper strip is connected with a starting bent copper bar; a tail bent copper bar is connected and arranged at the tail of the copper strip; insulating sleeves are sleeved on the starting bent copper bar and the tail bent copper bar; the winding directions of the first coil and the second coil are opposite.
Furthermore, a stainless steel ribbon is annularly bound on the periphery of the coil group; the coil group and the periphery of the base are annularly bound with a fixing binding belt; the planes of the winding directions of the stainless steel cable ties and the fixing cable ties are perpendicular to each other.
Has the advantages that: the utility model discloses an output filter inductor of a high-power inverter system, which comprises a coil group and an iron core group; the coil assembly comprises a first coil and a second coil; the iron core group comprises a first iron core and a second iron core; the first iron core and the second iron core are of C-shaped structures and are embedded in the coil group oppositely, and compared with traditional silicon steel laminated products and powder blocky products, the integral assembly of the products is easier; the first coil and the second coil are arranged in parallel, so that a product can bear larger current and is easy to manufacture; the first coil and the second coil are transversely arranged and overlapped along the height direction; the second coil is arranged above the first coil; the downward side of the first coil is provided with a base in an attaching manner; therefore, the overall installation height of a product can be reduced, meanwhile, the upper plane of the base is fully contacted with the outer plane of the coil, the temperature dissipation of the coil is facilitated, the temperature rise is reduced, and the operation stability is further improved; while reducing core eddy current losses.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an inductor;
FIG. 2 is a schematic diagram of a coil configuration;
FIG. 3 is a schematic diagram of an iron core structure;
FIG. 4 is a schematic view of a base structure;
fig. 5 is an inductor assembly diagram.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
An output filter inductor of a high-power inverter system is shown in figure 1 and comprises a coil group and an iron core group 1; the iron core group is specifically an iron core made of an iron-based amorphous material, the iron-based amorphous alloy has excellent soft magnetic performance, high hardness, high wear resistance and excellent corrosion resistance, a strip winding design is adopted, a long magnetic path structure design is adopted, so that the anti-saturation property of the product is improved, and the current drop can be effectively inhibited under a high-current working state, so that the product achieves the characteristics of miniaturization, low loss and high anti-saturation; meanwhile, the C-shaped opposite insertion structure is adopted, so that the integral assembly of the product is easier compared with the traditional silicon steel laminated products and powder blocky products;
the coil assembly includes a first coil 17 and a second coil 18; the iron core group comprises a first iron core 19 and a second iron core 20; the first iron core 19 and the second iron core 20 are both of C-shaped structures and are embedded in the coil group oppositely; the first coil 17 and the second coil 18 are arranged in parallel, so that the product can bear larger current under the condition of the same volume, and the product is easy to manufacture; meanwhile, the coils are connected in parallel, the inductance of the product is designed to be close to the required dynamic working inductance according to the inductance parallel principle under the static condition, so that the inductance is linearly distributed under the normal working current, and the anti-saturation characteristic of the product is far superior to that of the traditional series structure design;
the first coil 17 and the second coil 18 are transversely arranged and vertically overlapped, so that the overall installation height of a product can be reduced, meanwhile, the upper plane of the base is fully contacted with the outer plane of the coil, the temperature dissipation of the coil is facilitated, the temperature rise is reduced, and the operation stability is further improved; the second coil 18 is arranged above the first coil 17; the downward side of the first coil 17 is provided with a base 5 in an attaching manner; the traditional mounting base is fixed with the iron core, so that the eddy current loss of the iron core can be increased, and the base 5 is arranged on the coil side, so that the loss increase can be avoided;
as shown in fig. 3, an air gap sheet 13 is clamped between the first iron core 19 and the second iron core 20, the air gap sheet is made of aluminum material, the aluminum material has non-ferromagnetic property, the thickness consistency is high, the air gap sheet is not easy to deform under pressure, and the inductance of the product is stable; the first iron core 19 and the second iron core 20 are internally provided with insulating plates 10 respectively; and one side of the insulating plate 10, which is back to the corresponding iron core, is attached to the coil group.
The inner side turning positions of the first iron core 19 and the second iron core 20 are provided with concave round corner structures, so that the processing difficulty of the bending positions is reduced, the insulating plate 10 can be placed in a flat mode, and the window space is not occupied.
The first coil 17 and the second coil 18 are wound by double-layer copper strips 4, so that larger inductance value can be obtained by smaller volume; and the inside is respectively provided with an insulating framework 2; the outer surface of the first coil 17 is coated with insulating paper 3; the starting position of the copper strip 4 is connected with a starting bent copper bar 15; the tail of the copper strip 4 is connected with a tail bent copper bar 14; a connecting copper bar 9 is arranged between the starting bent copper bar 15 and the tail bent copper bar 14, and the connecting copper bar 9 is fastened through a brass screw 6, a brass gasket 7 and a brass nut 8; the starting bent copper bar 15 and the tail bent copper bar 14 are sleeved with insulating sleeves 16 for insulating the iron core group 1;
the winding directions of the first coil 17 and the second coil 18 are opposite, as shown in the attached drawing 2, the first coil 17 is wound by copper strips 4 in a double-layer mode clockwise, insulating paper 3 is padded between the copper strips 4, and specifically NMN insulating paper is adopted; the insulating framework 2 in the first coil 17 is made of NOMEX410 insulating paper; the installation base 5 and the fixing bandage 12 can be effectively isolated and insulated; the insulating framework 2 and the insulating paper 3 extend out of the upper end and the lower end of the coil copper strip 4 to serve as effective end air creepage distances; and the second coil 18 is wound along the anticlockwise direction, so that the initial bent copper bar 15 of the first coil 17 and the initial bent copper bar 15 of the second coil 18 can be connected in a coplanar manner in the same direction, and similarly, the bent copper bar 14 at the tail of the first coil 17 and the tail of the second coil 18 can also be connected in a coplanar manner in the same direction, so that the assembly and the external lead connection are easy.
A stainless steel ribbon 11 is annularly bound on the periphery of the coil group; the coil group and the periphery of the base 5 are annularly bound with a fixing binding belt 12; the planes of the winding directions of the stainless steel cable ties 11 and the fixing cable ties 12 are perpendicular to each other, so that the overall structural strength of the inductor can be obviously improved through bidirectional fixing; as shown in the attached figure 4, the base 5 is made of a cold-rolled steel plate with the thickness of 3mm, and is simple in structure due to the adoption of a bending forming process. The top plane fully contacts with first coil 17 surface, can effectively play the radiating action to coil winding.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (5)
1. The utility model provides a high-power inverter system output filter inductance which characterized in that: comprises a coil group and an iron core group (1); the coil assembly comprises a first coil (17) and a second coil (18); the iron core group comprises a first iron core (19) and a second iron core (20); the first iron core (19) and the second iron core (20) are both of C-shaped structures and are embedded in the coil group oppositely; the first coil (17) and the second coil (18) are arranged in parallel; the first coil (17) and the second coil (18) are transversely arranged and vertically overlapped; the second coil (18) is arranged above the first coil (17); the downward side of the first coil (17) is provided with a base (5) in an attaching manner.
2. The high power inverter system output filter inductor according to claim 1, wherein: an air gap sheet (13) is clamped between the first iron core (19) and the second iron core (20); insulating plates (10) are respectively arranged inside the first iron core (19) and the second iron core (20); one side of the insulating plate (10) back to the corresponding iron core is attached to the coil group.
3. The high power inverter system output filter inductor according to claim 2, wherein: and concave round corner structures are arranged at the inner side turning positions of the first iron core (19) and the second iron core (20).
4. The high power inverter system output filter inductor according to claim 1, wherein: the first coil (17) and the second coil (18) are wound by double-layer copper strips (4), and are internally provided with insulating frameworks (2) respectively; the outer surface of the first coil (17) is coated with insulating paper (3); the starting part of the copper strip (4) is connected with a starting bent copper bar (15); the tail of the copper strip (4) is connected with a tail bent copper bar (14); the starting bent copper bar (15) and the tail bent copper bar (14) are sleeved with insulating sleeves (16); the winding directions of the first coil (17) and the second coil (18) are opposite.
5. The high power inverter system output filter inductor according to claim 1, wherein: a stainless steel ribbon (11) is annularly bound on the periphery of the coil group; the coil group and the periphery of the base (5) are annularly bound with a fixing binding belt (12); the planes of the winding directions of the stainless steel cable tie (11) and the fixed cable tie (12) are perpendicular to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921060339.5U CN209843460U (en) | 2019-07-09 | 2019-07-09 | Output filter inductor of high-power inverter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921060339.5U CN209843460U (en) | 2019-07-09 | 2019-07-09 | Output filter inductor of high-power inverter system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209843460U true CN209843460U (en) | 2019-12-24 |
Family
ID=68899606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921060339.5U Expired - Fee Related CN209843460U (en) | 2019-07-09 | 2019-07-09 | Output filter inductor of high-power inverter system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209843460U (en) |
-
2019
- 2019-07-09 CN CN201921060339.5U patent/CN209843460U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |