CN220651783U - Composite iron core structure for reactor - Google Patents
Composite iron core structure for reactor Download PDFInfo
- Publication number
- CN220651783U CN220651783U CN202322344492.3U CN202322344492U CN220651783U CN 220651783 U CN220651783 U CN 220651783U CN 202322344492 U CN202322344492 U CN 202322344492U CN 220651783 U CN220651783 U CN 220651783U
- Authority
- CN
- China
- Prior art keywords
- iron core
- core
- magnetic powder
- composite
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Soft Magnetic Materials (AREA)
Abstract
The utility model relates to a composite iron core structure for a reactor, and belongs to the technical field of manufacturing of reactors. The technical proposal is as follows: the upper iron yoke and the lower iron yoke of the composite iron core are silicon steel sheet iron cores (1), the center column of the composite iron core is formed by compounding the silicon steel sheet iron cores (1) and the magnetic powder core iron cores (2), and an air gap is not arranged in the whole magnetic circuit of the composite iron core. The beneficial effects of the utility model are as follows: the high magnetic conductivity of the silicon steel sheet iron core and the advantages of uniform air gap, low loss and low noise of the metal magnetic powder iron core are combined, and the high magnetic conductivity and the advantages of low loss and low noise of the metal magnetic powder iron core are jointly established on the same magnetic circuit, so that the loss and the noise of the reactor can be reduced on the premise of meeting the inductance requirement, the overall size of the reactor is reduced, and the cost is reduced.
Description
Technical Field
The utility model relates to a composite iron core structure for a reactor, and belongs to the technical field of manufacturing of reactors.
Background
In the power grid, reactive compensation plays a key role in improving the quality of electric energy and improving the economic benefit of the power grid, so reactive compensation technology is always a hot spot and a difficult point of electric power system research. The shunt reactor is used as the electric device which is the core in the reactive compensation technology, can effectively compensate the capacitance effect on the transmission line, and can absorb reactive power in light load, thereby ensuring the stability and high efficiency of electric energy transmission. Currently, in the prior art, an iron core reactor is mostly adopted as a reactive compensation device of a transformer substation, for example, a Chinese patent CN201720647389.8 name is an iron core reactor with a double zero crossing adjustment function, and a CN202021421665.7 name is a three-phase reactive compensation reactor. However, the noise pollution problem caused by the iron core reactor is serious, which has adverse effect on the environment, and the noise generated by the reactor needs to be further reduced. The use of an all-magnetic-powder-core reactor can reduce reactor noise, for example: chinese patent CN202320268777.0 name a medium power magnetic powder core reactor structure, CN201420662707.4 name a magnetic powder core reactor core without air gap, etc. However, the length of the ABC three-phase magnetic field magnetic circuit of the all-magnetic powder core planar reactor cannot be equal, the deviation of inductance is unbalanced due to the difference of the magnetic circuit lengths, the deviation can reach more than 20%, the index requirement that the three-phase deviation of the silicon steel reactor is less than or equal to 5% cannot be met, and the silicon steel reactor cannot be used on site.
Disclosure of Invention
The utility model aims to provide a composite iron core structure for a reactor, which integrates the advantages of a silicon steel sheet iron core and a metal magnetic powder iron core, is built on the same magnetic path together, reduces the loss and noise of the reactor on the premise of meeting the inductance requirement, reduces the overall size of the reactor, reduces the cost and solves the problems existing in the background technology.
The technical scheme of the utility model is as follows:
a composite iron core structure for a reactor is formed by a silicon steel sheet iron core and a magnetic powder core iron core together, wherein an upper iron yoke and a lower iron yoke of the composite iron core are silicon steel sheet iron cores, a center column of the composite iron core is formed by compositing the silicon steel sheet iron cores and the magnetic powder core iron cores, and an air gap is not arranged in an integral magnetic circuit of the composite iron core; the magnetic powder core iron core is a cylinder, a plurality of hollow stainless steel pipes are arranged in the radial direction of the cylinder, the stainless steel pipes are used as heat dissipation channels of the magnetic powder core iron core, and two ends of the stainless steel pipes are used as heat dissipation holes. The stainless steel tube is used for heat dissipation, and the stainless steel tube is non-magnetic and does not generate heat.
The center post of the composite iron core is formed by bonding a silicon steel sheet iron core and a magnetic powder core iron core together through epoxy resin.
The magnetic powder core iron core is positioned in the middle of the middle column of the composite iron core, and both ends of the magnetic powder core iron core are bonded with the silicon steel sheet iron core through epoxy resin.
The stainless steel tube is obliquely arranged along the radial direction of the magnetic powder core iron core cylinder.
The maximum working magnetic flux density of the composite iron core is not more than 1 Tkilovolt ampere/cm.
The magnetic powder core iron core is formed by putting a mixture composed of a magnetic powder core and a forming agent into a mold, wherein the mold is a PC plastic cylinder, a bottom plate is an epoxy glass cloth plate, the mold is provided with mold radiating holes at the positions of the magnetic powder core iron core radiating holes, the mold radiating holes are transversely arranged in pairs in the plastic cylinder, the mixture is poured into the mold, then a stainless steel pipe is penetrated into the mold radiating holes, the mixture in the mold is compacted, and the mold is heated and solidified after demolding to form the magnetic powder core iron core; the magnetic powder core iron core and the silicon steel sheet iron core are bonded through epoxy resin to form a composite iron core.
The beneficial effects of the utility model are as follows: the high magnetic conductivity of the silicon steel sheet iron core and the advantages of uniform air gap, low loss and low noise of the metal magnetic powder iron core are combined, and the high magnetic conductivity and the advantages of low loss and low noise of the metal magnetic powder iron core are jointly established on the same magnetic circuit, so that the loss and the noise of the reactor can be reduced on the premise of meeting the inductance requirement, the overall size of the reactor is reduced, and the cost is reduced. Because the composite iron core is not provided with an air gap, the magnetic powder core iron core has extremely low magnetostriction coefficient, and can effectively reduce the vibration problem of the reactor, thereby reducing the noise of the reactor. The magnetic powder core iron core is provided with a heat dissipation hole, which is beneficial to heat dissipation and reduces the temperature rise of the reactor.
Drawings
FIG. 1 is a schematic view of a composite core structure according to an embodiment of the present utility model;
fig. 2 is a schematic view of manufacturing a magnetic powder core according to an embodiment of the present utility model;
in the figure: the magnetic powder iron core comprises a silicon steel sheet iron core 1, a magnetic powder iron core 2, a first pressing plate 3, a nut 4, a disc spring 5, a screw 6, a pressing block 7, a second pressing plate 8, a magnetic powder core 9, a die 10 and a stainless steel pipe 11.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings.
A composite iron core structure for a reactor is formed by a silicon steel sheet iron core 1 and a magnetic powder core iron core 2, wherein an upper iron yoke and a lower iron yoke of the composite iron core are silicon steel sheet iron cores 1, a middle column of the composite iron core is formed by compositing the silicon steel sheet iron cores 1 and the magnetic powder core iron cores 2, and an air gap is not arranged in an overall magnetic circuit of the composite iron core; the magnetic powder core iron core 2 is a cylinder, a plurality of hollow stainless steel pipes 11 are arranged in the radial direction of the cylinder, the stainless steel pipes 11 are used as heat dissipation channels of the magnetic powder core iron core 2, and two ends of the stainless steel pipes 11 are used as heat dissipation holes. The stainless steel tube 11 is used for heat dissipation, and the stainless steel tube is non-magnetic and does not generate heat.
The center leg of the composite iron core is formed by bonding a silicon steel sheet iron core 1 and a magnetic powder core iron core 2 together through epoxy resin.
The magnetic powder core iron core 2 is positioned in the middle of the middle column of the composite iron core, and two ends of the magnetic powder core iron core 2 are bonded with the silicon steel sheet iron core 1 through epoxy resin.
The stainless steel tube 11 is obliquely arranged along the radial direction of the cylinder of the magnetic powder core iron core 2.
The maximum working magnetic flux density of the composite iron core is not more than 1 Tkilovolt ampere/cm.
The magnetic powder core 2 is formed by putting a mixture composed of a magnetic powder core and a forming agent into a die 10, wherein the die 10 is a PC plastic cylinder, a bottom plate is an epoxy glass cloth plate, the die 10 is provided with die radiating holes at the radiating holes of the magnetic powder core 2, the die radiating holes are arranged in pairs transversely in the plastic cylinder, the mixture is poured into the die 10 and then penetrates into a stainless steel tube 11 through the die radiating holes, the mixture in the die is compacted, and the mixture is heated and solidified after demoulding to form the magnetic powder core 2; the magnetic powder core 2 and the silicon steel sheet core 1 are bonded by epoxy resin to form a composite core.
The magnetic powder core is made of iron-silicon-aluminum magnetic powder and is formed by pressing 85% of iron, 9% of silicon and 6% of aluminum alloy powder in a weight ratio; the magnetic powder core and the forming agent are mixed to form a mixture, and the weight ratio of the magnetic powder core of the mixture to the forming agent is 15-17: 1, the forming agent consists of epoxy resin, a curing agent, a toughening agent and an accelerator according to the following weight portion ratio: 1000:800:150:2.
the number of the mold radiating holes is multiple, and the mold radiating holes are longitudinally arranged along the mold 10; placing the mixture into a mold 10, compacting while discharging, temporarily penetrating a steel wire when the height exceeds a pair of mold heat dissipation holes, straightening the steel wire, penetrating a stainless steel pipe 11 from the mold heat dissipation holes along the direction of the steel wire, taking out the steel wire, placing the mixture and the mold on a vibration platform for vibration, and further compacting the magnetic powder core of the mixture.
In an embodiment, the specific manufacturing process of the composite core is as follows:
the process of mixing the magnetic powder core and the forming agent into a mixture comprises the following steps: the magnetic powder core and the forming agent are manually stirred until no liquid is seen, then poured into a stirring tank, the stirring speed of the stirring tank is set to be 50 revolutions per minute, the stirring time is 25 minutes, and the uniformly stirred mixture is poured into a die 10.
The mold 10 is a PC plastic cylinder with the cylinder wall of 5mm and the bottom plate of 5mm thick epoxy glass cloth, the mold 10 is provided with mold heat dissipation holes in the heat dissipation holes of the magnetic powder core 2, the mold heat dissipation holes are arranged in pairs in the radial direction of the plastic cylinder and temporarily penetrate into steel wires, a polyester film is placed at the bottom of the plastic cylinder, the mold is convenient to demould, and the cylinder wall and the bottom plate are adhered and fixed by unsaturated resin; fixing the die with a tool to prevent the die from moving; a plurality of mold heat dissipation holes are formed in the mold, and the mold heat dissipation holes are plugged by transparent adhesive tapes to prevent magnetic powder from extruding out
Placing the mixture into a die 10, discharging and compacting at the same time, polishing a plastic cylinder to observe whether the iron core is compact or not, temporarily penetrating a steel wire when the height exceeds a pair of die heat dissipation holes, straightening the steel wire, compacting the magnetic powder core iron core 2 once by using a compaction tool when the height of the magnetic powder core iron core 2 is raised by 60mm until the height requirement of the magnetic powder core iron core 2 is met; straightening the steel wire, penetrating a stainless steel pipe 11 from the position of a heat radiation hole of the die along the direction of the steel wire, selecting a thin-wall stainless steel pipe with the wall thickness of 0.2mm and the diameter of 6mm, taking out the steel wire, putting the mixture and the die on a vibration platform for vibration, and further compacting the magnetic powder core of the mixture; the pressing time is pressurized by a tool consisting of a screw rod 6, a nut 4, a disc spring 5, a first pressing plate 3, a second pressing plate 8 and a pressing block 7, wherein the disc springs 5 are in a plurality of pairs, so that the magnetic powder core can keep proper pressure for a long time in the heating and curing process; then heating and solidifying the demolded magnetic powder core iron core, wherein the heating temperature is 90 ℃ and the heating time is 5 hours; the cured magnetic powder core 2 is processed to the required design size, assembled with the silicon steel sheet core 1 of the composite core, and bonded with epoxy resin. Because the composite iron core is not provided with an air gap, the magnetic powder core has extremely low magnetostriction coefficient, and can effectively reduce the vibration problem of the reactor, thereby reducing the noise of the reactor. The magnetic powder core iron core 2 is provided with a radiating hole, which is beneficial to radiating and reducing the temperature rise of the reactor.
The tool comprises a screw rod 6, a nut 4, a disc spring 5, a first pressing plate 3, a second pressing plate 8 and a pressing block 7, wherein the first pressing plate 3 is arranged at the bottom and the upper side of the magnetic powder core iron core 2, a plurality of screw rods 6 are arranged around the magnetic powder core 2, the first pressing plates 3 are connected together by the screw rods 6, the second pressing plate 8 is arranged at the top of the magnetic powder core 2, the pressing block 7 is arranged between the second pressing plate 8 and the first pressing plate 3 above, and the top of the screw rod 6 tightly presses the second pressing plate 8 with the magnetic powder core 2 through the disc spring 5 and the nut 4.
Claims (3)
1. The utility model provides a compound iron core structure for reactor which characterized in that: the upper iron yoke and the lower iron yoke of the composite iron core are silicon steel sheet iron cores (1), the center column of the composite iron core is formed by compositing the silicon steel sheet iron cores (1) and the magnetic powder core iron cores (2), and an air gap is not arranged in the whole magnetic circuit of the composite iron core; the magnetic powder core iron core (2) is a cylinder, a plurality of hollow stainless steel pipes (11) are arranged in the radial direction of the cylinder, the stainless steel pipes (11) are used as heat dissipation channels of the magnetic powder core iron core (2), and two ends of the stainless steel pipes (11) are used as heat dissipation holes.
2. A composite core structure for a reactor according to claim 1, wherein: the center post of the composite iron core is formed by bonding a silicon steel sheet iron core (1) and a magnetic powder iron core (2) together through epoxy resin.
3. A composite core structure for a reactor according to claim 1 or 2, characterized in that: the stainless steel tube (11) is obliquely arranged along the radial direction of the cylinder of the magnetic powder core (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322344492.3U CN220651783U (en) | 2023-08-30 | 2023-08-30 | Composite iron core structure for reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322344492.3U CN220651783U (en) | 2023-08-30 | 2023-08-30 | Composite iron core structure for reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220651783U true CN220651783U (en) | 2024-03-22 |
Family
ID=90268875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322344492.3U Active CN220651783U (en) | 2023-08-30 | 2023-08-30 | Composite iron core structure for reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220651783U (en) |
-
2023
- 2023-08-30 CN CN202322344492.3U patent/CN220651783U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101556864B (en) | Method for winding resin insulating dry type transformer coil | |
| JP2022023021A (en) | MOLDING DEVICE FOR RING-SHAPED Nd-Fe-B BASED SINTERED MAGNETIC MATERIAL AND METHOD FOR MANUFACTURING RING-SHAPED Nd-Fe-B BASED SINTERED MAGNETIC MATERIAL | |
| CN117059374A (en) | Composite iron core structure and manufacturing method for reactor | |
| CN109722057A (en) | Graphene composite material, preparation method and its preparation facilities of high heat conductance | |
| CN218019703U (en) | Horizontal epoxy casting structure of full-conductor coil | |
| CN108598495A (en) | A kind of device and method preparing fuel cell composite dual-electrode plates | |
| CN202084397U (en) | 35kV amorphous alloy epoxy dry-type transformer | |
| CN202034202U (en) | Transformer body cushion block with silicon rubber bar | |
| CN201570357U (en) | Amorphous alloy transformer and low-voltage coil structure thereof | |
| CN215152021U (en) | Composite material propeller blade forming die | |
| CN112837925B (en) | Five tooth module coil forming device of marine wind power | |
| CN212848033U (en) | But height-adjusting's coil mould | |
| CN202523519U (en) | Coil structure for dry-type transformer | |
| CN211416170U (en) | Mold core cooling device for injection molding | |
| CN2919480Y (en) | Epoxide resin dry-type iron-core reactor | |
| CN2387620Y (en) | Amorphous alloy drying transformer | |
| CN223890423U (en) | A high-efficiency injection mold | |
| CN223833476U (en) | A high-strength pressing device for the production of iron-silicon-aluminum soft magnets | |
| CN221633981U (en) | Bare cell heating device | |
| CN2641784Y (en) | Dry type transformer of resin casted insulation winding iron core | |
| CN114919114B (en) | Horizontal epoxy pouring structure of all-conductor coil | |
| CN103280306B (en) | Production method for pouring dry type transformer with epoxy resin by using three-in-one common mold | |
| CN222451484U (en) | High-frequency heating solidification matrix preparation equipment | |
| CN223131155U (en) | Carbon fiber equipment cabin bottom plate production equipment and its installation structure for high-speed EMUs | |
| CN218054154U (en) | Magnetic material produces die mould device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |