CN108039271B - Method for optimizing EI transformer material - Google Patents
Method for optimizing EI transformer material Download PDFInfo
- Publication number
- CN108039271B CN108039271B CN201710984278.0A CN201710984278A CN108039271B CN 108039271 B CN108039271 B CN 108039271B CN 201710984278 A CN201710984278 A CN 201710984278A CN 108039271 B CN108039271 B CN 108039271B
- Authority
- CN
- China
- Prior art keywords
- transformer
- electrical steel
- steel material
- magnetic induction
- load
- 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
- 239000000463 material Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 69
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000004088 simulation Methods 0.000 claims abstract description 38
- 230000004907 flux Effects 0.000 claims abstract description 36
- 230000006698 induction Effects 0.000 claims abstract description 28
- 229910052742 iron Inorganic materials 0.000 claims abstract description 27
- 238000004804 winding Methods 0.000 claims description 10
- 230000005284 excitation Effects 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 7
- 238000007716 flux method Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/341—Preventing or reducing no-load losses or reactive currents
Abstract
The invention provides a method for optimizing EI transformer materials, wherein the EI transformer is made of electrical steel materials; the method comprises the following steps: establishing a physical simulation model of the transformer according to EI transformer parameters; carrying out EI transformer no-load working condition simulation according to the simulation model to obtain the maximum value of the magnetic flux density of the EI transformer during no-load; obtaining the numerical range of the actual operation working flux density of the EI transformer according to the maximum value of the flux density; confirming the position ranges of the actual operation working flux density of the EI transformer on the magnetic field-magnetic induction curve and the magnetic induction-iron loss curve according to the magnetic field-magnetic induction curve and the magnetic induction-iron loss curve of the electrical steel material; and adjusting the electromagnetic property of the electrical steel material within the position range of the actual operation working flux density of the transformer. The invention selects and develops the electrical steel material with the optimal cost performance to improve the output performance of the EI-type transformer and reduce the production cost of the EI-type transformer.
Description
Technical Field
The invention belongs to the technical field of transformer materials, and particularly relates to a method for optimizing an EI transformer material.
Background
The EI transformer is one of electronic transformers and is defined according to the shape of a core, because the core of the EI transformer is formed by overlapping an E-shaped sheet and an I-shaped sheet, the EI transformer is called as the EI transformer. EI transformers are typically power (low frequency) transformers (50HZ or 60HZ), power transformers, and some audio transformers are also EI transformers, as is used acoustically.
The country needs to create a conservation-oriented society, so energy-saving and environment-friendly products become a new direction for the development of manufacturing industry in recent years. The EI transformer is one of important equipment in production and life, and the loss reduction has important economic significance on a power grid. The loss is generally reduced through structural design to current EI transformer, has set up at least one leakage magnetic space iron core in the leakage magnetic space of EI type transformer for example, can make the leakage magnetic flux obtain showing and improve, and then improves transformer impedance, the stray loss of the transformer that significantly reduces the adverse effect of leakage magnetic simultaneously. However, it is rarely studied how to obtain a cost-effective transformer from the manufacturing materials.
Disclosure of Invention
In view of the above-mentioned drawbacks in the prior art, the present invention is directed to a method for optimizing EI transformer materials, so as to obtain an electrical steel material for making an EI transformer with optimal cost performance.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for optimizing EI transformer materials, wherein the EI transformer is made of electrical steel materials; the method comprises the following steps:
establishing a physical simulation model of the transformer according to EI transformer parameters;
carrying out EI transformer no-load working condition simulation according to the simulation model to obtain the maximum value of the magnetic flux density of the EI transformer during no-load;
obtaining the numerical range of the actual operation working flux density of the EI transformer according to the maximum value of the flux density;
confirming the position range of the actual operation working flux density of the EI transformer on the magnetic field-magnetic induction curve (B-H) and the magnetic induction-iron loss curve (B-P) according to the magnetic field-magnetic induction curve (B-H) and the magnetic induction-iron loss curve (B-P) of the electrical steel material;
and adjusting the electromagnetic property of the electrical steel material within the position range of the actual operation working flux density of the transformer.
As a further preference, the adjusting of the electromagnetic properties of the electrical steel material comprises: reduce the iron loss P of the electrical steel material and improve the magnetic induction B of the electrical steel material.
More preferably, the method for reducing iron loss P and improving magnetic induction B of the electrical steel material includes: the preparation process of the electrical steel material is adjusted to reduce the iron loss P and improve the magnetic induction B.
As a further preference, the EI transformer parameters include size, winding design, and excitation source parameters.
As a further preference, the dimensions include core dimensions; the winding design comprises the number of primary coil turns and the iron core stacking thickness; the excitation source parameters comprise no-load voltage and working frequency.
As a further preferred, the method for establishing a physical simulation model of a transformer includes: magnet, Maxwell or FLUX methods.
As a further preferred example, the simulation of the EI transformer no-load condition includes: and carrying out excitation source setting, mesh subdivision and boundary condition setting, and carrying out EI transformer no-load condition simulation by using a finite element algorithm and a solver integrated in the method for establishing the physical simulation model of the transformer.
As a further preferred option, the simulation of the no-load condition of the EI transformer further includes: obtaining no-load loss and no-load current.
As a further preference, the EI transformer model is selected from EI × 48, EI × 35, and EI × 33.
The invention has the beneficial effects that: according to the method, a physical simulation model of the transformer can be established according to EI transformer parameters, then EI transformer no-load working condition simulation is carried out according to the simulation model, and the maximum value of the magnetic flux density of the EI transformer in no-load is obtained by a simulation analysis method; the magnetic flux density in the no-load state is close to the working magnetic density in the actual operation state, so that the numerical range of the working magnetic density in the actual operation of the EI transformer can be estimated, and the position range of the working magnetic density in the actual operation state on the magnetic field-magnetic induction curve (B-H) and the magnetic induction-iron loss curve (B-P) is confirmed according to the magnetic field-magnetic induction curve (B-H) and the magnetic induction-iron loss curve (B-P) of the electrical steel material A; the electromagnetic performance of the electrical steel material can be adjusted within the position range of the actual operation working flux density of the transformer in a targeted manner, and the electrical steel material with the optimal cost performance is developed; therefore, on the one hand, the output performance of the EI transformer is improved, and on the other hand, the manufacturing cost of the EI transformer can be reduced due to the reduction of the cost of the electrical steel materials.
Drawings
Fig. 1 is a schematic flow chart of a method for optimizing EI transformer materials according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an EI transformer physical simulation model established in an embodiment of the present invention.
Fig. 3 is a cloud chart of the magnetic density of the EI transformer in no-load operation according to the embodiment of the invention.
Fig. 4 is a comparative diagram of magnetic induction-iron loss curves (B-P) of electrical steel materials a and B of an EI transformer in accordance with an embodiment of the present invention.
Fig. 5 is a comparison diagram of magnetic field-magnetic induction curves (B-H) of electrical steel materials a and B of an EI transformer in accordance with an embodiment of the present invention.
Detailed Description
The invention provides a method for optimizing EI transformer materials, overcomes the defects of the prior art, researches on how to obtain a transformer with high cost performance from manufacturing materials, and can screen and obtain an EI transformer manufacturing electrical steel material with optimal cost performance.
In order to solve the above problems, the main idea of the embodiment of the present invention is:
as shown in fig. 1, the method for optimizing EI transformer material according to the embodiment of the present invention is implemented by using an electrical steel material; the method comprises the following steps:
establishing a physical simulation model of the transformer according to EI transformer parameters;
carrying out EI transformer no-load working condition simulation according to the simulation model to obtain the maximum value of the magnetic flux density of the EI transformer during no-load;
obtaining the numerical range of the actual operation working flux density of the EI transformer according to the maximum value of the flux density;
confirming the position range of the actual operation working flux density of the EI transformer on the magnetic field-magnetic induction curve (B-H) and the magnetic induction-iron loss curve (B-P) according to the magnetic field-magnetic induction curve (B-H) and the magnetic induction-iron loss curve (B-P) of the electrical steel material;
and adjusting the electromagnetic property of the electrical steel material within the position range of the actual operation working flux density of the transformer.
The no-load loss and the no-load current are two most important output performances of the EI transformer, the no-load loss refers to that when rated voltage is applied to one winding of the EI transformer, and other windings are open circuits, active power absorbed by the transformer is the same no-load loss no matter how large the load is carried as long as the transformer is put into a power grid, and the no-load loss is independent of the load carried by the transformer. The no-load current is a current which is called a primary no-load current and consists of a magnetizing current (which generates magnetic flux) and an iron loss current (which is caused by iron core loss), wherein a rated voltage is applied to the primary winding when all secondary windings are open.
The no-load loss and the no-load current of the EI transformer are respectively mainly determined by the iron loss (B-P) and the magnetic induction (B-H) of an electrical steel material, and the lower the iron loss of the electrical steel material is, the lower the no-load loss of the EI transformer is corresponding to the actual running magnetic density of the EI transformer; the higher the magnetic induction of the electrical steel material, the smaller the no-load current of the EI transformer. In general, the lower the iron loss of the electrical steel material, the higher the magnetic induction of the electrical steel material, and the higher the cost of the electrical steel material.
The embodiment of the invention is based on mature commercial electromagnetic simulation software, such as Magnet or Maxwell or FLUX software, a physical simulation model of the EI transformer is established in the electromagnetic simulation software according to parameters of the EI transformer, such as actual size, winding design, excitation source and the like, as shown in figure 2, excitation source setting, grid subdivision, boundary condition setting and the like are carried out, then EI transformer no-load working condition simulation is carried out by utilizing a finite element algorithm and a solver integrated in the simulation software, and the EI transformer no-load loss, no-load current and no-load working FLUX density can be simulated, and the simulated EI transformer no-load working FLUX density is shown in figure 3. The magnetic flux density in the no-load state is close to the working magnetic density in the actual operation state, so that the numerical range of the working magnetic density in the actual operation of the EI transformer can be estimated; the actual operation magnetic density of the EI transformer corresponds to the electromagnetic property of an iron core material-electrical steel material used by the EI transformer: confirming the position ranges of the actual operation working magnetic density of the EI transformer on the magnetic property curves B-H and B-P of the electrical steel material; and further, the electromagnetic performance of the EI transformer at the positions where the actual operation magnetic density of the EI transformer is located on the magnetic performance curves B-H and B-P of the electrical steel material is pertinently improved, and the electrical steel material with the optimal cost performance is selected or developed.
In order to make the aforementioned and other objects, features, and advantages of the present invention comprehensible, embodiments accompanied with the present invention are described below.
Examples
The basic parameters of the EI transformer example are as follows:
transformer type: EI 48
No-load voltage: 120V
The working frequency is as follows: 60HZ
Primary coil number of turns: 1110T
And (3) iron core stacking thickness: 20mm
Iron core size (mm):
| full length a | Full width f | Height of window e | Width of window c | Width of tongue d | Width of side b |
| 48 | 32 | 24 | 8 | 16 | 8 |
The method for optimizing the EI transformer material comprises the following steps:
firstly, an EI transformer physical simulation model is built according to the basic parameters of the EI transformer, as shown in FIG. 2.
Then, electromagnetic simulation analysis is performed according to the established physical simulation model (Magnet method) of the EI transformer and the basic parameters of the EI transformer, and the maximum value of the magnetic flux density of the EI transformer in the idle state in the steady state is calculated to be 1.3462T.
Thirdly, the positions of the magnetic density of the EI transformer on the magnetic property curves B-H and B-P of the electrical steel material are confirmed by combining the magnetic field-magnetic induction curve (B-H) of the electrical steel material and the magnetic induction-iron loss curve (B-P), and referring to fig. 4 and 5, the positions of the magnetic density of the EI transformer on the magnetic property curves B-H and B-P of the electrical steel material are both in the first half section. The magnetic field-magnetic induction curve and the magnetic induction-iron loss curve of the electrical steel material can be tested and provided by manufacturers when the electrical steel material is purchased.
And thirdly, the electromagnetic performance of the EI transformer at the position where the actual operation magnetic density is on the magnetic performance curves B-H and B-P of the electrical steel material is improved in a targeted manner. For example, the prior art EI material B has magnetic property curves B-H and B-P as shown in fig. 4 and 5, respectively, and the no-load loss and the no-load current of the EI transformer manufactured by using the prior art EI material B are 600mW and 9.6 ml, respectively (as shown in the simulation analysis method set forth above, the no-load loss and the no-load current of the EI transformer are simulation analyzed).
In order to reduce the no-load loss and the no-load current of the EI transformer and improve the output performance of the EI transformer, the electromagnetic performance of the EI transformer at the positions where the actual operation magnetic density of the EI transformer is on the magnetic performance curves B-H and B-P of the electrical steel material needs to be improved in a targeted manner, namely the iron loss P of the electrical steel material at the position is reduced and the magnetic induction B of the electrical steel material at the position is improved. Generally, the cost for improving the electromagnetic performance of the first half section is lower than that of the second half section.
Therefore, on the basis of the electrical steel material B, the electrical steel material a is researched and developed in a targeted mode, magnetic property curves B-H and B-P of the electrical steel material a are also shown in fig. 4 and 5, compared with the electrical steel material B, the magnetic property curves B-H and B-P of the electrical steel material a have lower iron loss P and higher magnetic induction B at the magnetic flux density position of actual operation of the EI transformer, and the magnetic property curves B-H and B-P of the electrical steel material a and the electrical steel material B have a cross point at which the magnetic induction is about 1.45T. The no-load loss and the no-load current of the EI transformer manufactured by using the electrical steel material a are 558mW and 8.1mI respectively, and the output performance of the EI transformer is improved compared with that of the EI transformer manufactured by using the electrical steel material b. Furthermore, the electrical steel material a has a lower production cost than the electrical steel material b.
Finally, the electromagnetic performance of the EI transformer at the position where the actual operation magnetic density of the EI transformer is located on the magnetic performance curves B-H and B-P of the electrical steel material is pertinently improved, and the electrical steel material a with the optimal cost performance is developed on the basis of the electrical steel material B, so that the output performance of the EI transformer is improved, and the manufacturing cost of the EI transformer is reduced due to the reduction of the cost of the electrical steel material.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
according to the embodiment of the invention, a physical simulation model of the transformer can be established according to EI transformer parameters, then EI transformer no-load working condition simulation is carried out according to the simulation model, and the maximum value of the magnetic flux density of the EI transformer in no-load is obtained by a simulation analysis method; the magnetic flux density in the no-load state is close to the working flux density in the actual operation state, so that the numerical range of the working flux density in the actual operation state of the EI transformer can be estimated, and the position range of the working flux density in the actual operation state on the magnetic field-magnetic induction curve (B-H) and the magnetic induction-iron loss curve (B-P) is confirmed according to the numerical range of the magnetic field-magnetic induction curve (B-H) and the magnetic induction-iron loss curve (B-P) of the electrical steel material A; the electromagnetic performance of the electrical steel material in the position range can be adjusted in a targeted manner, and the electrical steel material with the optimal cost performance is developed; therefore, on the one hand, the output performance of the EI transformer is improved, and on the other hand, the manufacturing cost of the EI transformer can be reduced due to the reduction of the cost of the electrical steel materials.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A method for optimizing EI transformer materials, wherein the EI transformer is made of electrical steel materials; the method is characterized in that: the method comprises the following steps:
establishing a physical simulation model of the transformer according to EI transformer parameters; the method for establishing the physical simulation model of the transformer comprises the following steps: magnet, Maxwell or FLUX methods; the EI transformer parameters comprise size, winding design and excitation source parameters; wherein the dimensions comprise core dimensions; the winding design comprises the number of primary coil turns and the iron core stacking thickness; the excitation source parameters comprise no-load voltage and working frequency, and the sizes comprise iron core sizes; the winding design comprises the number of primary coil turns and the iron core stacking thickness; the excitation source parameters comprise no-load voltage and working frequency;
carrying out EI transformer no-load working condition simulation according to the simulation model to obtain the maximum value of the magnetic flux density of the EI transformer during no-load; EI transformer no-load condition simulation includes: carrying out excitation source setting, mesh subdivision and boundary condition setting, and carrying out EI transformer no-load condition simulation by using a finite element algorithm and a solver integrated in the method of the established physical simulation model of the transformer;
obtaining the numerical range of the actual operation working flux density of the EI transformer according to the maximum value of the flux density;
confirming the position ranges of the actual operation working flux density of the EI transformer on the magnetic field-magnetic induction curve and the magnetic induction-iron loss curve according to the magnetic field-magnetic induction curve and the magnetic induction-iron loss curve of the electrical steel material; and adjusting the electromagnetic property of the electrical steel material within the position range of the actual operation working flux density of the transformer.
2. The method of optimizing EI transformer material of claim 1, wherein: the adjusting of the electromagnetic properties of the electrical steel material comprises: reduce the iron loss P of the electrical steel material and improve the magnetic induction B of the electrical steel material.
3. The method of optimizing EI transformer material of claim 2, wherein: the magnetic induction B for reducing the iron loss P and improving the magnetic induction B of the electrical steel material comprises: the preparation process of the electrical steel material is adjusted to reduce the iron loss P and improve the magnetic induction B.
4. The method of optimizing EI transformer material of claim 1, wherein: the EI transformer no-load condition simulation further comprises the following steps: obtaining no-load loss and no-load current.
5. The method of optimizing EI transformer material of claim 1, wherein: the EI transformer model is selected from EI × 48, EI × 35 and EI × 33.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984278.0A CN108039271B (en) | 2017-10-20 | 2017-10-20 | Method for optimizing EI transformer material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984278.0A CN108039271B (en) | 2017-10-20 | 2017-10-20 | Method for optimizing EI transformer material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108039271A CN108039271A (en) | 2018-05-15 |
| CN108039271B true CN108039271B (en) | 2020-03-17 |
Family
ID=62093227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710984278.0A Active CN108039271B (en) | 2017-10-20 | 2017-10-20 | Method for optimizing EI transformer material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108039271B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116451544B (en) * | 2023-05-31 | 2023-11-07 | 南通大学 | Intelligent optimization design method for high-power high-frequency transformer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015164060A1 (en) * | 2014-04-22 | 2015-10-29 | Transformer Llc | Transformer with improved power handling capacity |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545156B (en) * | 2012-01-13 | 2014-10-22 | 中国电力科学研究院 | Exciting current emulation calculating method and device at time of direct-current magnetic biasing |
| CN102998980B (en) * | 2012-11-13 | 2016-07-20 | 中国电力科学研究院 | A kind of electric railway traction power supply system real-time simulation modeling method |
| CN103116088B (en) * | 2013-01-14 | 2014-12-10 | 湖北省电力公司电力科学研究院 | Large-scale transformer three-phase parameter inconsistent operation analysis method |
| EP2999099A1 (en) * | 2014-08-07 | 2016-03-23 | E.G.O. ELEKTRO-GERÄTEBAU GmbH | Electric drive system for a household appliance and household appliance |
| CN104657599A (en) * | 2015-01-30 | 2015-05-27 | 国家电网公司 | Single-phase transformer model for calculating direct current magnetic bias through equivalent differential electric/magnetic path principle |
| CN104779047A (en) * | 2015-03-26 | 2015-07-15 | 浙江永固输配电设备有限公司 | Electromagnetic design method of amorphous alloy transformer |
| CN105956332B (en) * | 2016-05-31 | 2019-12-10 | 河北工业大学 | transformer electromagnetic optimization design method based on expert system |
-
2017
- 2017-10-20 CN CN201710984278.0A patent/CN108039271B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015164060A1 (en) * | 2014-04-22 | 2015-10-29 | Transformer Llc | Transformer with improved power handling capacity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108039271A (en) | 2018-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201210442Y (en) | Novel high resistance self-coupled transformer | |
| TWI514427B (en) | Inductance and switch circuit including the inductance | |
| CN105742047A (en) | Control method for inductance parameter of high-frequency transformer body | |
| CN107703368B (en) | Method for measuring inductance of transformer in deep saturation state | |
| CN110399695B (en) | Coiled core eddy current loss assessment method considering uneven distribution of magnetic flux density | |
| CN111914413A (en) | Magnetic core high-frequency loss calculation method under excitation of symmetric/asymmetric rectangular voltage | |
| CN108039271B (en) | Method for optimizing EI transformer material | |
| CN201421769Y (en) | Magnetic valve type controllable reactor three-plunger non air-gap iron core | |
| CN209374239U (en) | SMX separation type coil inductance | |
| JP5082966B2 (en) | Transformer manufacturing method | |
| CN110749799A (en) | Extra-high voltage transformer direct current magnetic bias equivalent test method and system | |
| Liu et al. | Design and optimization of high frequency transformer with nanocrystalline core | |
| CN201984925U (en) | High-power pulse transformer | |
| Dong et al. | Optimal design of DD coupling coil for wireless charging system of electric vehicle | |
| CN104330651A (en) | Screening device for high-frequency transformer magnetic core and method thereof | |
| CN204651151U (en) | A kind of pulse transformer | |
| Hasan et al. | Core loss characteristics analysis of power transformer under different frequencies excitation | |
| CN101118806A (en) | Amorphous ultracrystallite iron core manufacturing method | |
| CN204166062U (en) | A kind of screening plant of high frequency transformer magnetic core | |
| CN115440458A (en) | Low-loss planar inductance magnetic core and design method thereof | |
| CN205428660U (en) | Microwave high -tension transformer | |
| Guo et al. | Study on no-load loss of amorphous alloy control transformer based on the finite element analysis | |
| CN102426912A (en) | Process for producing transformer iron core | |
| Moradnouri et al. | Amorphous metal triangular cores to improve distribution transformers design | |
| CN204614623U (en) | A kind of electrical transformer cores structure of low no-load loss |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231007 Address after: No. 025 Zhao'an Street, Qian'an Economic Development Zone, Tangshan City, Hebei Province, 064400 Patentee after: SHOUGANG ZHIXIN QIAN'AN ELECTROMAGNETIC MATERIALS Co.,Ltd. Address before: 100041 No. 68, Shijingshan Road, Beijing, Shijingshan District Patentee before: BEIJING SHOUGANG Co.,Ltd. |
|
| TR01 | Transfer of patent right |