CN205881644U - Low noise CD sections core and adopt high voltage transformers of this kind of iron core - Google Patents
Low noise CD sections core and adopt high voltage transformers of this kind of iron core Download PDFInfo
- Publication number
- CN205881644U CN205881644U CN201620583923.9U CN201620583923U CN205881644U CN 205881644 U CN205881644 U CN 205881644U CN 201620583923 U CN201620583923 U CN 201620583923U CN 205881644 U CN205881644 U CN 205881644U
- Authority
- CN
- China
- Prior art keywords
- iron core
- short
- coil
- side arm
- long
- 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
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The utility model relates to a low noise CD sections core adopts the nanocrystalline strip of magnetism to make, it can be each other to the length of closing, two short U -iron core to include, the side arm length of short U -iron core does 9 of two long, short U -iron core side arm length sums 12%. The utility model discloses still relate to a high voltage transformers, include the iron core and install primary and the secondary coil on the iron core, the iron core adopts low noise CD sections core, primary and secondary coil cup joint by the side arm of two long, short U -iron cores is each other to on the iron core post that closes formation. The transformer noise that adopts the preparation of this kind of iron core is low, and electromagnetic performance is good.
Description
Technical field
This utility model relates to a kind of low noise CD shaped iron core and a kind of high-tension transformer using this iron core, mainly may be used
For high-tension transformer and other transformators.
Background technology
Transformator is a kind of common power equipment, is widely used, such as, along with the enhancing of people's environmental consciousness, air
Pollutant control work is day by day strengthened, and the flue dust that particularly produces burning coal, SO2 etc. suspend the improvement of granule in atmosphere
Being one of the vital task of China's present stage, the high purifying rate being had due to high-pressure static cleaner, to atmosphere pollution
Control more and more use the way of high-pressure electrostatic precipitation, therefore the demand of electrostatic dust-removing electrical source is increased
Add.Existing high-tension transformer, such as supporting with electric dust-removing equipment booster transformer, many employing CD shaped iron cores, there is silicon steel core,
Also there is a nanocrystalline or amorphous alloy iron core, but the iron core of the most any material, it is the most all to wind continuously with a steel band
After be fixed to the rectangle that corner is round and smooth, then cut in the middle of the long limit of rectangle and form two identical U-shapeds of structure, in order to coil
Installation, install latter two U-iron core of coil in the most involutory state, form the complete rectangle that a corner is round and smooth, this
Plant the transformator of structure, particularly iron core and use the nanocrystalline or transformator of non-crystaline amorphous metal, in use can produce higher making an uproar
Sound, and the output characteristics of transformator is the most not ideal enough.
Summary of the invention
For overcoming the drawbacks described above of prior art, this utility model provides a kind of low noise CD shaped iron core, a kind of employing
The transformator of this low noise CD shaped iron core, particularly high-tension transformer, the transformer noise using this iron core to prepare is low, and
Electromagnetic performance is good.
The technical solution of the utility model is:
A kind of low noise CD shaped iron core, uses Magnetic Nanocrystals Containing band to make, including can be the most involutory long and short two
U-iron core, described long and short two U-iron cores are to being combined into rectangle, and the corner of described rectangle is curved, it is characterised in that described short U
The 9-12% of a length of described long and short two the U-iron core side arm length sums of side arm of shape iron core.
A kind of high-tension transformer, the primary coil including iron core and being arranged on iron core and secondary coil, described iron core is adopted
With any one low noise CD shaped iron core disclosed in this utility model, described primary coil and secondary coil are socketed in by described
In the iron core column that the side arm of long and short two U-iron cores is mutually combined to form, described primary coil and secondary coil are enclosed within iron core one
In the same iron core column of side or described primary coil and secondary coil are enclosed within the different iron core column of iron core both sides.
The beneficial effects of the utility model are: noise is low, for exporting the booster transformer of 12kV, in total structure, work
In the case of other factors such as skill and material are similar, use the prior art of same configuration, noise (A sound relative to two U-iron cores
Level, lower same) it is generally possible to reduce about 30-50 dB (A), even can reduce 60-70 dB (A), meanwhile, temperature rise and output harmonic wave etc.
Aspect also has some improvement.
Accompanying drawing explanation
Fig. 1 relates to the inside transformer organigram of iron core and coil.
Detailed description of the invention
See Fig. 1, the utility model discloses a kind of low noise CD shaped iron core, use Magnetic Nanocrystals Containing band to make, bag
Include can be the most involutory long and short two U-iron cores 10,60, length X of the side arm 61 of described short U-iron core 60 be described length,
The 9-12% of short two U-iron core side arm length 11,61 sums L, the most described long and short two U-iron core side arm length sums
9.9-10.1%, the 10% of the most described long and short two U-iron core side arm length sums.Iron core uses two U-shapeds
The structure that iron core is the most involutory, is divided into the most involutory two U-iron core, it is simple to the coil set that will prepare in other words by iron core
It is connected in iron core column, and without directly coiling on iron core, preparation and the installation of described coil can use any suitable
Prior art.In the iron core of fit on coil, said two U-iron core is the most involutory, forms a rectangle, generally this square
The corner of shape is round and smooth arc, can this shape and analogous shape be called racetrack (shape).
Based on the facility in processing and raising production efficiency, described long and short two U-iron cores can be by same runway sections
Core cutting forms, and the section that cutting is formed constitutes the involutory surface (i.e. side arm end face) that described long and short two U-iron cores are the most involutory
50。
Applicant studies discovery, the position of otch, or more precisely, the side arm of described long and short two U-iron cores is long
The proportionate relationship of degree, is the key factor affecting transformer noise, also affects the output performance of transformator simultaneously.According to applicant
Test, in the case of other factors are identical, when a length of described long and short two the U-iron core side arms of the side arm of short U-iron core
In one narrow range of about the 10% of length sum, transformer noise (use A sound level metering, lower with) there will be one bright
Aobvious paddy deformation, valley (minimum) is located substantially on the position of (10 ± 0.1) % (different iron core slightly difference), works as institute
State the side arm length of short U-iron core and the ratio of described long and short two U-iron core side arm length sums when being 9-12%, at noise
In the mildest the lowest point, for the transformator for noise relatively big (such as, more than 100 dB (A) under routine techniques), decibel
Value can be down under routine techniques (i.e. iron core is involuted by two isometric U-iron cores) about the 1/2 of noise decibel value, and ratio closes on model
Enclose (the side arm length of described short U-iron core and described long and short two U-iron core side arm length ratio less than 8% and be more than
15%) noise can reduce at least 15-25 dB (A), when a length of described long and short two U-irons of the side arm of described short U-iron core
Time in the range of the 9.9-10.1% of core side arm length sum, noise substantially achieves or close to valley.Thus, when cutting runway
During shaped iron core, with the racetrack a length of L of iron core internal ring, incision site distance X away from iron core internal ring one end thinks that the 1/10 of L is
Preferably.
The transformator of multiple different size contrast test data under several cutting modes are presented herein below:
Mode 1, when X takes the 1/2 of L:
| Noise (dB (A)) | Primary inductance (mH) | Secondary inductance (H) | Output voltage (kV) |
| 90-110 | 6.0-6.5 | 400-450 | 11.6-12.0 |
Mode 2, when X takes the 1/3 of L:
| Noise (dB (A)) | Primary inductance (mH) | Secondary inductance (H) | Output voltage (kV) |
| 85-105 | 5.5-6.0 | 300-330 | 11.2-12.0 |
Mode 3, when X takes the 1/4 of L:
| Noise (dB (A)) | Primary inductance (mH) | Secondary inductance (H) | Output voltage (kV) |
| 81-98 | 8.0-8.4 | 450-550 | 12.5-12.8 |
Mode 4, when X takes the 1/8 of L:
| Noise (dB (A)) | Primary inductance (mH) | Secondary inductance (H) | Output voltage (kV) |
| 56-68 | 4.5-5.0 | 350-400 | 12.7-12.9 |
Mode 5, when X takes the 1/10 of L:
| Noise (dB (A)) | Primary inductance (mH) | Secondary inductance (H) | Output voltage (kV) |
| 54-61 | 5.0-8.0 | 400-600 | 11.7-13.3 |
(side arm of described short U-iron core is equivalent to when employing U-iron core adds the iron core conformation of transverse sheet (in-line iron core)
A length of zero), then noise is similar with the noise using the iron core involuted by two isometric U-iron cores.
Above-mentioned correction data transformator based on plurality of specifications, the power of the transformator of different size is different, every kind of specification
Transformator peek, to reject the impact of single transformer error, metering system (such as height and distance etc.) is identical.Change of the same race
Depressor is under different cutting modes, in addition to cutting mode difference, and other factors (including structure, material and technique etc.) basic phase
With.For the transformator of different size, under a kind of cutting mode, noise is relatively large, and under other cutting modes, noise is also
Relatively large, vice versa, and such as, the maximum noise under different cutting modes is from a kind of transformator, and minimum noise is from separately
A kind of transformator.
The surface of described racetrack iron core is preferably provided with the face coat formed through workmanship of spraying plastics, thus, is formed after cutting
Two U-iron cores surface except cutting formed section in addition to, the most all with face coat on all outer surfaces, face coat
Setting not only contributes to protection and insulation, and is also beneficial to reduce vibration and noise.
The invention also discloses a kind of high-tension transformer, including iron core and primary coil 40 He being arranged on iron core
Secondary coil 30, described iron core uses disclosed any one low noise CD shaped iron core of this utility model, described primary coil and
Secondary coil is socketed in the iron core column being mutually combined to form by the side arm of described long and short two U-iron cores, according to transformator
Design, described primary coil and secondary coil can be enclosed within the same iron core column of iron core side, it is also possible to be socketed in iron core two
In the different iron core column of side.
Described primary coil and the secondary coil socket mode in described iron core column may is that in described iron core column fixing
It is socketed with coil rack 20, described primary coil and secondary coil fixedly sleeved on described coil rack, described coil rack
Prior art or the other technologies of any suitable can be used, be typically provided with central authorities' axially extending bore, so that corresponding ferrum can be enclosed within
On stem stem, can fix to be provided with the coil of annular groove-shaped structure or other forms for installing and fixing corresponding coil outside it
Assembly.
Preferably, described primary coil and described secondary coil along the axial distribution of coil, be provided with each other spacer and/
Or leaving external series gap, described spacer can use any nonmagnetic substance or other appropriate materials.
Preferably, described secondary coil is divided into some groups along coil axial distribution, be provided with between each group spacer and/or
Leaving external series gap, the electrical connection between each group can realize by connecting wire and/or connector according to prior art, institute
State spacer and can use any nonmagnetic substance or other appropriate materials.
This utility model transformator adapt to high pressure occasion under, by arrange between primary coil and secondary coil every
From, isolation is set between each group of secondary coil, effectively solves coil turn-to-turn voltage height and puncture magnet wire insulation layer
Problem.
The invention also discloses a kind of for preparing various low noise CD shaped iron core disclosed in the utility model
Iron core preparation method, by nanocrystalline strip coiling annular core, is pressed into mold the internal ring of annular core, makes the shape of annular core
Shape becomes racetrack (rectangle that corner is round and smooth or analogous shape) with the press-in of mold, and thermally treated, dipping lacquer and drying and processing must
Can also be increased other when wanting and process technique, take out mold after sizing, obtain racetrack iron core, by two of this racetrack iron core
Corresponding sides (usually two long limits) cutting perpendicularly, long and short two the U-iron cores described in formation, described mold can use appoints
Anticipate suitable prior art, generally round and smooth in corner rectangle, corresponding outside pressing mold can be set and coordinate with mold, by annular
Iron core forming is racetrack iron core, and the U-iron core cut out is lamination.
Preferably, before being cut, described racetrack iron core is carried out surface plastic spraying process, at described racetrack iron core
Surface forms face coat, thus, the outer surface of described long and short two U-iron cores, in addition to the end face that cutting is formed, is all provided with
There is face coat, the setting of these face coats, not only facilitate protection, and contribute to interfixing lamination, form one
Individual entirety, and then reduce vibration and the noise of lamination.
Preferably, the material processed for described plastic-blasting is the epoxy molding powder with epoxy resin as main film forming substance, institute
State and epoxy molding powder is mixed with the ferromagnetic nano magnetic powder that mass fraction is 0.15-0.25%, the existing skill of any suitable can be used
Art makes the fully dispersed and uniform mixing of nano-magnetic powder being mixed in epoxy molding powder.Such as, described epoxy molding powder is also mixed with quality
Mark is the PVP(Polyvinyl pyrrolidone of 0.015-0.025%, polyvidone), when i.e. preparing described oxidation molding powder, add
Enter the ferromagnetic nano magnetic powder that mass fraction is 0.15-0.25% and the PVP that mass fraction is 0.015-0.025% as newly increasing
Raw material, prepare according to routine techniques together with each raw material of original epoxy molding powder.
It is further preferred that the described mode adding ferromagnetic nano magnetic powder and PVP when preparing epoxy molding powder is first will
Required PVP is prepared as aqueous solution, and (dispersion of water consumption Main Basis magnetic powder and the requirement being spray-dried, can be according to practical situation
Determine according to equipment performance, empirical data and/or by test), described PVP aqueous solution adds required ferromagnetic nano magnetic
Powder, mix homogeneously and make magnetic powder fully dispersed, then it is spray-dried, forms magnetic mixed powder, by described magnetic mixed powder
As preparing the raw material of epoxy molding powder, according to the epoxy molding powder described in usual manner preparation together with other raw materials.Described epoxy
On the basis of molding powder can use the existing epoxy molding powder being arbitrarily suitable to nano crystal iron wicking surface plastic-blasting, increase the ferrum of corresponding proportion
Magnetic Nano magnetic powder and PVP, the physical characteristic of the epoxy molding powder thus prepared and plastic-blasting process technique and usual manner system
Identical for the corresponding epoxy magnetic powder without magnetic powder gone out.
The described preferred nanometer iron powder of ferromagnetic nano magnetic powder, the mass ratio of described ferromagnetic nano magnetic powder and PVP is preferably
10:1, while thus can requiring meeting magnetic powder dispersion, it is to avoid the too much PVP adverse effect to epoxy molding powder performance.
According to the test of applicant, the epoxy molding powder used by plastic-blasting adds ferromagnetic nano magnetic powder (nanometer iron powder),
The ferromagnetism of magnetic powder can be utilized, rely on the interaction with lamination, it will be apparent that improve the noise reduction of face coat, often
After rule epoxy molding powder is mixed into ferromagnetic nano magnetic powder and PVP with above-mentioned optimal way, in the case of other factors are identical, phase
For using Conventional epoxy molding powder, it is possible to reduce noise about 2-4dB(A further), and do not interfere with the electromagnetic performance of transformator.
First iron powder and PVP are prepared as magnetic mixed powder by above-mentioned spray drying, contribute to magnetic powder at final epoxy
Dispersion in molding powder and uniformly, and contribute to iron powder in oxidation molding powder with adhesion or the bond strength of other compositions, and then
It is favorably improved noise reduction effect and avoids the negative effect to transformator electromagnetic performance.
Preferably, after racetrack iron core is cut into long and short two U-iron cores, formed by cutting on U-iron core
Section (side arm end face) use the corundum of 400 mesh to carry out blasting treatment, remove the trickle burr in edge and by sharp-pointed seamed edge
(including property at parts of edges and corners) wears into round and smooth arc, thus reduces between faradic current and the lamination concentrating on seamed edge because of seamed edge
The interaction that place's faradic current (induced current density) causes greatly, reduces consequent vibration and noise.According to applicant
Test, abrasive material used by sandblasting select impact reduce the effect of noise, particle diameter and hardness excessive, too small all will affect noise reduction imitate
Really, even can produce opposite effect, increase noise to a certain extent.According to the test of applicant, for existing nanocrystalline
For transformer core prepared by material, use the corundum of 400 mesh can obtain preferable noise reduction, in other factor phases
In the case of Tong, the contribution to this utility model noise reduction is about 1-3dB (A), in different cutting techniques, power and output
Can be different under the factors such as voltage.
Preferably, should carry out the iron core circumferential surface with handled end surfaces during sandblasting covering protection to avoid injuring
Face coat, but owing to face coat is different from core lamination stack cutting characteristic and cutting accuracy limits the different cutting knots caused
Really, under the conditions of protection, the mild wear of the face coat (coating end face) of end face periphery is contributed to facilitating transformator by sandblasting
Assemble and improve assembly precision, and then avoid affecting the electromagnetic performance of transformator because cut end is not good in the face of conjunction.
Described Magnetic Nanocrystals Containing band is the band that can be used in preparing nanocrystalline iron core, can use showing of any suitable
There are technology and other technologies, such as, for preparing the Fe base of nanocrystalline iron core, Co under the brand such as existing Finemet, Nanoperm
Base, Ni base alloy strip steel rolled stock, can be in amorphous state when these alloy strip steel rolled stocks dispatch from the factory, in prepared by iron core, through suitable annealing treatment
Reason is formed nanocrystalline.
Claims (11)
1. a low noise CD shaped iron core, uses Magnetic Nanocrystals Containing band to make, including long and short two U that can be the most involutory
Shape iron core, described long and short two U-iron cores are to being combined into rectangle, and the corner of described rectangle is curved, it is characterised in that described short U
The 9-12% of a length of described long and short two the U-iron core side arm length sums of side arm of shape iron core.
2. low noise CD shaped iron core as claimed in claim 1, it is characterised in that the side arm of described short U-iron core is a length of described
The 9.9-10.1% of long and short two U-iron core side arm length sums.
3. low noise CD shaped iron core as claimed in claim 2, it is characterised in that the side arm of described short U-iron core is a length of described
The 10% of long and short two U-iron core side arm length sums.
4. the low noise CD shaped iron core as described in claim 1,2 or 3, it is characterised in that described long and short two U-iron cores are by same
One racetrack iron core cutting forms, and the section that cutting is formed constitutes the involutory surface that described long and short two U-iron cores are the most involutory.
5. low noise CD shaped iron core as claimed in claim 4, it is characterised in that the surface of described racetrack iron core is provided with through spray
Mould the face coat that technique is formed.
6. a high-tension transformer, the primary coil including iron core and being arranged on iron core and secondary coil, it is characterised in that institute
Stating iron core and use any one low noise CD shaped iron core in claim 1-5, described primary coil and secondary coil are socketed in
In the iron core column being mutually combined to form by the side arm of described long and short two U-iron cores, described primary coil and secondary coil are enclosed within
In the same iron core column of iron core side or described primary coil and secondary coil are enclosed within the different iron core column of iron core both sides.
7. high-tension transformer as claimed in claim 6, it is characterised in that described primary coil and secondary coil are at described iron core
Socket mode on post is fixedly sleeved in described iron core column to have coil rack, and described primary coil and secondary coil are fixedly sleeved
On described coil rack.
8. high-tension transformer as claimed in claim 7, it is characterised in that described coil rack is provided with central authorities' axially extending bore, institute
State the outside of coil rack and be provided with the coil fixation kit of annular groove-shaped structure for installing and fix corresponding coil.
9. high-tension transformer as claimed in claim 8, it is characterised in that described primary coil and described secondary coil are along coil
Axial distribution, be provided with spacer each other and/or leave external series gap.
10. high-tension transformer as claimed in claim 9, it is characterised in that described secondary coil is divided into along coil axial distribution
Some groups, it is provided with spacer between each group and/or leaves external series gap.
11. high-tension transformers as claimed in claim 10, it is characterised in that described spacer is nonmagnetic substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620583923.9U CN205881644U (en) | 2016-06-16 | 2016-06-16 | Low noise CD sections core and adopt high voltage transformers of this kind of iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620583923.9U CN205881644U (en) | 2016-06-16 | 2016-06-16 | Low noise CD sections core and adopt high voltage transformers of this kind of iron core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205881644U true CN205881644U (en) | 2017-01-11 |
Family
ID=57691481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620583923.9U Active CN205881644U (en) | 2016-06-16 | 2016-06-16 | Low noise CD sections core and adopt high voltage transformers of this kind of iron core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205881644U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690031A (en) * | 2019-10-16 | 2020-01-14 | 广东美的厨房电器制造有限公司 | Transformer framework, transformer and electric equipment |
-
2016
- 2016-06-16 CN CN201620583923.9U patent/CN205881644U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690031A (en) * | 2019-10-16 | 2020-01-14 | 广东美的厨房电器制造有限公司 | Transformer framework, transformer and electric equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106024321B (en) | Low noise CD iron-cores, transformer and iron core preparation method | |
| US20160086715A1 (en) | Mixed magnetic powders and the electronic device using the same | |
| KR101719496B1 (en) | Soft magnetic metal powder core | |
| CN205881644U (en) | Low noise CD sections core and adopt high voltage transformers of this kind of iron core | |
| CN102610370A (en) | Composite soft magnetic core for resisting electromagnetic interference | |
| CN109103010B (en) | Material and method for improving density of magnetic powder core insulating layer | |
| CN108766737B (en) | Combined inductor and preparation method thereof | |
| CN105551708A (en) | Additive-manufactured magnetic core and magnetic device employing same | |
| CN107119174B (en) | Annealing method for improving DC bias performance of Fe-Si-Al soft magnetic powder core | |
| CN102962465B (en) | Low-permeability, low-power consumption Fe-Si-Al soft magnetic material and production method thereof | |
| JPS5825561A (en) | Low weight magnetic field treatment unit for providing magnetic field to fluid in piping | |
| CN211350331U (en) | Toroidal core, toroidal transformer and inductor | |
| CN110853860A (en) | Iron-silicon-aluminum-nickel soft magnetic powder core with effective magnetic conductivity of 60 and preparation method thereof | |
| CN206921633U (en) | Power inductor | |
| CN210668047U (en) | Adjustable flat wire vertical winding annular magnetic core | |
| CN108831662A (en) | A kind of preparation method of iron powder core raw material and ferrocart core | |
| CN205595155U (en) | Non - closed magnetic circuit reactor | |
| WO2015106568A1 (en) | Preparation process for mnzn soft ferrite having ultra-low value loss and high uq | |
| CN202363214U (en) | Magnetic core for transformer | |
| CN208014546U (en) | A kind of silicon steel sheet lamination device for discharging, unidirectional laminating machine and its automatic laminating machine | |
| CN208368310U (en) | A kind of Novel inductor | |
| CN204991381U (en) | Three -dimensional book of silicon steel 20kV unshakable in one's determination open -type dry -type transformer unshakable in one's determination | |
| CN202120707U (en) | Novel chip inductor | |
| CN110853907A (en) | Iron-silicon-aluminum-nickel soft magnetic powder core with effective magnetic conductivity of 90 for switching power supply and preparation method thereof | |
| CN2919484Y (en) | No-noise low-magnetic-leakage power supply transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |