CN109326420B - Inductance balance magnetic core of three-phase reactor and three-phase reactor - Google Patents
Inductance balance magnetic core of three-phase reactor and three-phase reactor Download PDFInfo
- Publication number
- CN109326420B CN109326420B CN201811358801.XA CN201811358801A CN109326420B CN 109326420 B CN109326420 B CN 109326420B CN 201811358801 A CN201811358801 A CN 201811358801A CN 109326420 B CN109326420 B CN 109326420B
- Authority
- CN
- China
- Prior art keywords
- magnetic
- phase reactor
- inductance
- core
- yoke part
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 135
- 239000000843 powder Substances 0.000 claims description 9
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 8
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 239000004020 conductor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 1
- 229910008071 Si-Ni Inorganic materials 0.000 description 1
- 229910002796 Si–Al Inorganic materials 0.000 description 1
- 229910006300 Si—Ni Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- -1 iron silicon aluminum Chemical compound 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- H01F27/24—Magnetic cores
-
- 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
- H01F27/24—Magnetic cores
- H01F27/255—Magnetic cores made from particles
-
- 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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
-
- 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
- H01F2027/348—Preventing eddy currents
Abstract
The invention relates to the technical field of reactors, in particular to an inductance balance magnetic core of a three-phase reactor and the three-phase reactor. An inductance balance magnetic core of a three-phase reactor is mainly composed of an upper yoke, a lower yoke and a transverse 'Y' -shaped magnetic core composed of three magnetic columns, wherein air gap gaskets are arranged between the upper end and the lower end of the middle magnetic column and the upper yoke and the lower yoke. According to the magnetic core, the air gaps are arranged at the upper end and the lower end of the magnetic column, so that the coils are avoided, when the inductance of the three groups of coils reaches a balanced state, the phenomenon of magnetic flux diffusion is avoided, the eddy current loss is avoided, and therefore the local temperature rise of the coils is avoided, and the problem that the service life of the reactor is shortened due to the fact that the temperature of the coils at the air gaps of the magnetic core of the reactor is too high is solved.
Description
Technical Field
The invention relates to the technical field of reactors, in particular to an inductance balance magnetic core of a three-phase reactor and the three-phase reactor.
Background
A reactor, also called an inductor, when energized, produces a magnetic field in a certain space occupied by a conductor, so that all current-carrying electrical conductors have a general inductive character. However, the inductance of the electrified long straight conductor is smaller, and the generated magnetic field is not strong, so that the actual reactor is in a form of a solenoid formed by winding a wire, namely an air core reactor; sometimes, in order to make the solenoid have a larger inductance, a core is inserted in the solenoid. Reactance is classified into inductive reactance and capacitive reactance, and a comparatively scientific classification is that an inductive reactor (inductor) and a capacitive reactor (capacitor) are collectively called a reactor, however, since an inductor has been previously known in the past and is called a reactor, a capacitor is now called a capacitive reactor, and a reactor is referred to as an inductor exclusively.
Three-phase alternating current is a most common transmission form for electric energy transmission in China, and is called three-phase power for short. The three-phase AC power supply is composed of three AC potentials with the same frequency, equal amplitude and 120 degrees of mutual difference in phase sequence. The voltage between the phases is referred to as the line voltage, and the voltage between any two phases is 380V. The voltage between the phases and the neutral point is called the phase voltage, and the voltage at any one of the opposite neutral points is 220V. The power source generated by the generator is three-phase, and each phase of the three-phase power source and the neutral point of the three-phase power source can form a single-phase loop to provide 220V power energy for users.
In general, in an industrial system with high power application, three-phase alternating current is a choice with better energy use efficiency and stability, and is commonly found in motors, compressors, frequency converters, inverters, charging piles, communication power sources and the like. The shadow of the three-phase reactor is commonly found on the requirements of factors such as power factor correction, electromagnetic noise suppression, current ripple control and the like. In the design specifications of the three-phase reactor, the inductance values of the three sets of coils must be controlled within a certain range of difference. The magnetic circuit structure of the traditional three-phase reactor is in an E+E magnetic core combination mode, and the phenomenon that the inductance of the middle coil is higher is adjusted by separating an air gap through the middle of the middle magnetic column or separating the air gap through the three joint surfaces by gaskets. The phenomenon that the inductance of the middle coil is higher is that the magnetic circuit driven by the magnetomotive force of the middle coil is different from the magnetic circuit driven by the magnetomotive force of the outer two coils, the magnetic resistance of the magnetic circuit driven by the middle coil is lower than that of the outer coils, and the inductance is higher when the magnetic resistance is lower, so that the air gap of the middle column is used for increasing the magnetic resistance of the magnetic circuit driven by the middle coil to achieve the aim of reducing the inductance. However, the flux spreads outward, i.e., diffuses, at the air gap edge (see fig. 9). This flux is due to the air gap potential, which occurs in the core window, and at high frequencies it cuts the conductor near the air gap in the window causing eddy current losses, which in turn leads to an excessive temperature rise of the conductor in this region, shortening the life of the reactor.
Disclosure of Invention
The invention aims to provide an inductance balance magnetic core of a three-phase reactor and the three-phase reactor, which are used for solving the problem that the service life of the reactor is shortened due to overhigh temperature of a coil at an air gap of the magnetic core of the reactor.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an inductance balance magnetic core of three-phase reactor, mainly comprises horizontal "day" style of calligraphy magnetic core of upper yoke portion, lower yoke portion and three magnetic column, its characterized in that: air gap gaskets are arranged between the upper end and the lower end of the magnetic column in the middle and the upper yoke part and the lower yoke part.
Further, the magnetic column is formed by stacking a plurality of magnetic blocks.
Further, the magnetic column is vertically divided into multiple layers, and each layer is formed by arranging a plurality of magnetic blocks in an array.
Further, the upper yoke part and the lower yoke part are formed by stacking a plurality of magnetic blocks.
Further, the upper yoke part and the lower yoke part are respectively provided with three groups of magnetic block groups along the length direction, and the three groups of magnetic block groups are respectively positioned corresponding to the three magnetic columns; each magnetic block group comprises a plurality of vertical layers, and each layer is formed by arranging a plurality of magnetic blocks in parallel.
Further, one side of the magnetic block group positioned in the middle, which faces the magnetic column, is provided with an air gap gasket, and one side of the magnetic block group positioned at the two sides, which faces away from the magnetic column, is provided with an air gap gasket.
Further, the magnetic block is of a cuboid structure made of soft magnetic metal alloy powder cores or amorphous nanocrystalline powder cores or ferrite.
A three-phase reactor comprises an inductance balance magnetic core of any three-phase reactor.
Further, each magnetic column of the inductance balance magnetic core of the three-phase reactor is provided with a coil, the upper end and the lower end of the inductance balance magnetic core of the three-phase reactor are respectively provided with a fixing frame, and the two fixing frames are fixedly connected through fixing screws.
The beneficial effects of the invention are as follows: according to the magnetic core, the air gaps are arranged at the upper end and the lower end of the magnetic column, so that the coils are avoided, when the inductance of the three groups of coils reaches a balanced state, the phenomenon of magnetic flux diffusion is avoided, the eddy current loss is avoided, and therefore the local temperature rise of the coils is avoided, and the problem that the service life of the reactor is shortened due to the fact that the temperature of the coils at the air gaps of the magnetic core of the reactor is too high is solved.
Drawings
Fig. 1 is a schematic diagram of a front view of an inductance-balancing core of a three-phase reactor.
Fig. 2 is a schematic side view of an inductance-balancing core of a three-phase reactor.
Fig. 3 is a schematic diagram of a cross section of a magnetic pillar of an inductance balancing magnetic core of a three-phase reactor.
Fig. 4 is a schematic front view of a three-phase reactor.
Fig. 5 is a schematic side view of a three-phase reactor.
Fig. 6 is a schematic diagram of a front view of an inductance balancing core of a three-phase reactor.
Fig. 7 is a schematic side view of a three-phase reactor with an inductively balanced core.
Fig. 8 is a schematic diagram of a second cross section of a magnetic pillar of an inductance balance magnetic core of a three-phase reactor.
Fig. 9 shows a magnetic field simulation of a core assembly pattern having a magnetic path structure of e+e type with an air gap in a center pillar by FEMM (Finite Element Method Magnetics magnetic finite element method) software, showing a magnetic flux diffusion phenomenon at the edge of the air gap.
In the figure: 1. the magnetic yoke comprises an upper yoke part, a lower yoke part, a magnetic column, an air gap gasket, a coil, a magnetic block, a fixing frame, a fixing screw and a fixing screw, wherein the upper yoke part, the lower yoke part, the magnetic column, the air gap gasket, the coil, the magnetic block, the fixing frame and the fixing screw are arranged in sequence. 20. The magnetic core comprises an E+E type magnetic core 21, an intermediate coil 22, a center pole air gap 23, magnetic fluxes 24 and a diffusion magnetic flux.
Detailed Description
For a better understanding of the present invention, the technical solution of the present invention will be further described below with reference to the examples and the accompanying drawings (as shown in fig. 1 to 9).
An inductance balance magnetic core of a three-phase reactor is mainly a transverse 'Japanese' magnetic core which consists of an upper yoke part 1, a lower yoke part 2 and three magnetic columns 3; the upper yoke part 1, the lower yoke part 2 and the magnetic columns 3 are formed by stacking a plurality of magnetic blocks 6, the magnetic columns 3 are vertically divided into a plurality of layers, each layer is formed by arranging a plurality of magnetic blocks 6 in a rectangular array, three groups of magnetic block groups are arranged on the upper yoke part 1 and the lower yoke part 2 along the length direction, and the three groups of magnetic block groups are respectively positioned corresponding to the three magnetic columns 3; each magnetic block group comprises a plurality of vertical layers, and each layer is formed by arranging a plurality of magnetic blocks 6 in parallel; the side of the middle magnetic block group facing the magnetic column 3 is provided with an air gap gasket 4 (the upper end and the lower end of the middle magnetic column 3 and the upper yoke part 1 and the lower yoke part 2 are respectively provided with the air gap gasket 4, and the air gap gasket 4 is made of non-magnetic permeability materials), so that the magnetic block groups on two sides and the middle magnetic block group form a specific difference, and the side of the magnetic block groups on two sides, which is away from the magnetic column 3, is provided with the air gap gasket 4, so that the difference surface forms a coplanar surface through the surfaces of the air gap gaskets 4. The magnetic block 6 is a soft magnetic metal alloy powder core, such as Fe-Si-Al, fe-Si, fe-Ni, fe-Si-Ni and the like; or amorphous nanocrystalline powder core: or ferrites, such as manganese zinc ferrite; the cuboid structure is manufactured.
The utility model provides a three-phase reactor, includes the balanced magnetic core of inductance of three-phase reactor, all be equipped with coil 5 on every magnetic pillar 3 of the balanced magnetic core of inductance of three-phase reactor, the upper and lower both ends of the balanced magnetic core of inductance of three-phase reactor respectively are equipped with a mount 7, pass through fixed screw 8 fixed connection between two mounts 7. The fixing frame 7 is made of two metal machine components capable of properly accommodating the upper yoke part 1 and the lower yoke part 2, and a plurality of screw reserved holes are formed in the fixing frame 7.
The manufacturing process of the three-phase reactor comprises the following steps: (1) The small magnetic blocks in the upper yoke 1, the lower yoke 2 and the three magnetic columns 3 are glued first. The gluing operation of the magnetic block groups with the upper yoke part 1 and the lower yoke part 2 in the middle needs to consider the break difference, so that the non-magnetic material air gap gasket 4 with proper area and thickness can be cut before gluing, and is attached to the corresponding positions of the magnetic block groups, and the gluing operation of the upper yoke part 1 and the lower yoke part 2 can be performed after the three magnetic block groups are leveled. (2) After the components are manufactured, the upper yoke part 1 and the lower yoke part 2 can be respectively placed into the fixing frame 7 and glued and fixed. (3) The magnetic pole 3 is sleeved into the wound coil 5 and then is arranged between the upper yoke part 1 and the lower yoke part 2. (4) Finally, the upper and lower fixing frames 7 are connected through fixing screws 8.
As shown in fig. 1, 2, 3, 6, 7 and 8, the upper yoke 1, the lower yoke 2 and the magnetic pole 3 in the present application are formed by stacking magnetic blocks 6 of different sizes and different numbers, wherein the arrangement modes of the air gap gaskets 4 are the same. Therefore, for the three-phase reactor design with different power requirements, the three-phase reactor design can be completed by stacking the magnetic blocks 6 with different sizes and different numbers and matching with the air gap gaskets 4 with corresponding sizes. Therefore, another advantage of the present application is that it has a high flexibility and elasticity to meet the design requirements of three-phase reactors with different power requirements. The choice of material for the magnet 6, the manner of assembly and stacking, the dimensions and number of the magnets, etc. are evaluated based on the operating frequency, the maximum load current and the required inductance in the application conditions. In the selection of magnetic block materials, soft magnetic metal alloy powder cores, such as iron silicon powder cores, iron silicon aluminum powder cores, iron nickel powder cores and the like, are mainly used, and if the working frequency exceeds 100KHz, a manganese zinc ferrite core can be also used as a selection of another magnetic block material. Only the stack of each segment is designed and the other components can be designed according to the required size after sizing.
Principle of three-phase reactor: air gap gaskets 4 are arranged at the upper end and the lower end of the middle magnetic column 3, so that the inductance of the three groups of coils can reach a balanced state; the air gap gasket 4 is located outside the conductor coil 5, so that the influence of the diffusion magnetic flux effect of the air gap edge on the conductor coil 5 can be reduced to the minimum, thereby effectively reducing unnecessary eddy current loss on the conductor coil 5 and prolonging the service life of the reactor.
The above description is only of application examples of the present invention, and it is needless to say that the scope of the claims of the present invention should not be limited thereto, and therefore, the equivalent changes according to the claims of the present invention still belong to the protection scope of the present invention.
Claims (6)
1. The utility model provides an inductance balance magnetic core of three-phase reactor, mainly comprises horizontal "day" style of calligraphy magnetic core of upper yoke portion (1), lower yoke portion (2) and three magnetic column (3), its characterized in that: air gap gaskets (4) are arranged between the upper end and the lower end of the magnetic column (3) in the middle and the upper yoke part (1) and the lower yoke part (2); the magnetic column (3), the upper yoke part (1) and the lower yoke part (2) are formed by stacking a plurality of magnetic blocks (6); the upper yoke part (1) and the lower yoke part (2) are respectively provided with three groups of magnetic block groups along the length direction, and the three groups of magnetic block groups are respectively positioned corresponding to the three magnetic columns (3); each magnetic block group comprises a plurality of vertical layers, and each layer is formed by arranging a plurality of magnetic blocks (6) in parallel.
2. The inductance balancing core of a three-phase reactor according to claim 1, wherein: the magnetic column (3) is vertically divided into multiple layers, and each layer is formed by arranging a plurality of magnetic blocks (6) in an array.
3. The inductance balancing core of a three-phase reactor according to claim 1, wherein: an air gap gasket (4) is arranged on one side, facing the magnetic column (3), of the middle magnetic block group, and an air gap gasket (4) is arranged on one side, facing away from the magnetic column (3), of the magnetic block group on two sides.
4. The inductance balancing core of a three-phase reactor according to claim 1, wherein: the magnetic block (6) is of a cuboid structure made of soft magnetic metal alloy powder cores or amorphous nanocrystalline powder cores or ferrite.
5. A three-phase reactor comprising an inductively balanced magnetic core of the three-phase reactor of any one of claims 1-4.
6. The three-phase reactor according to claim 5, characterized in that: each magnetic column (3) of the inductance balance magnetic core of the three-phase reactor is provided with a coil (5), the upper end and the lower end of the inductance balance magnetic core of the three-phase reactor are respectively provided with a fixing frame (7), and the two fixing frames (7) are fixedly connected through a fixing screw (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811358801.XA CN109326420B (en) | 2018-11-15 | 2018-11-15 | Inductance balance magnetic core of three-phase reactor and three-phase reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811358801.XA CN109326420B (en) | 2018-11-15 | 2018-11-15 | Inductance balance magnetic core of three-phase reactor and three-phase reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109326420A CN109326420A (en) | 2019-02-12 |
| CN109326420B true CN109326420B (en) | 2023-12-26 |
Family
ID=65257285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811358801.XA Active CN109326420B (en) | 2018-11-15 | 2018-11-15 | Inductance balance magnetic core of three-phase reactor and three-phase reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109326420B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2088603A2 (en) * | 2008-02-06 | 2009-08-12 | ABB Technology AG | Shunt reactor |
| CN204010946U (en) * | 2014-04-11 | 2014-12-10 | 青岛云路新能源科技有限公司 | A kind of Novel filter reactor |
| CN104715899A (en) * | 2013-12-12 | 2015-06-17 | 台达电子企业管理（上海）有限公司 | Three-phase electric reactor |
| CN104851563A (en) * | 2014-02-14 | 2015-08-19 | 台达电子企业管理（上海）有限公司 | Magnetic core applied to reactor and reactor |
| CN206148231U (en) * | 2016-09-21 | 2017-05-03 | 东莞市宝诚电源科技有限公司 | Novel electric reactor |
| CN209357573U (en) * | 2018-11-15 | 2019-09-06 | 山西中磁尚善科技有限公司 | The inductance balance magnetic core and three-phase reactor of three-phase reactor |
-
2018
- 2018-11-15 CN CN201811358801.XA patent/CN109326420B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2088603A2 (en) * | 2008-02-06 | 2009-08-12 | ABB Technology AG | Shunt reactor |
| CN104715899A (en) * | 2013-12-12 | 2015-06-17 | 台达电子企业管理（上海）有限公司 | Three-phase electric reactor |
| CN104851563A (en) * | 2014-02-14 | 2015-08-19 | 台达电子企业管理（上海）有限公司 | Magnetic core applied to reactor and reactor |
| CN204010946U (en) * | 2014-04-11 | 2014-12-10 | 青岛云路新能源科技有限公司 | A kind of Novel filter reactor |
| CN206148231U (en) * | 2016-09-21 | 2017-05-03 | 东莞市宝诚电源科技有限公司 | Novel electric reactor |
| CN209357573U (en) * | 2018-11-15 | 2019-09-06 | 山西中磁尚善科技有限公司 | The inductance balance magnetic core and three-phase reactor of three-phase reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109326420A (en) | 2019-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108028127B (en) | Coil for non-contact power supply and non-contact power supply system | |
| EP2498266A2 (en) | Reactor and power converter using the same | |
| EP3136404B1 (en) | Coupling inductor | |
| CN102272869B (en) | High frequency transformers | |
| Minh et al. | Finite element modeling of shunt reactors used in high voltage power systems | |
| Varajão et al. | Power transformer for a single-stage bidirectional and isolated ac-dc matrix converter for energy storage systems | |
| US20200312595A1 (en) | Polyphase switching regulator | |
| CN209418265U (en) | A kind of inductor | |
| CN208722707U (en) | Multisection type air gap transformator magnetic core | |
| CN206931469U (en) | A kind of multiple-channel output transformer of switching power control system | |
| CN109326420B (en) | Inductance balance magnetic core of three-phase reactor and three-phase reactor | |
| Mao et al. | Winding loss mechanism analysis and design for new structure high-frequency gapped inductor | |
| KR102136026B1 (en) | Combined structure of variable-capacity transformer structure using ferrite core for magnetic flux assistance and method for manufacturing the same | |
| CN116598102A (en) | Inductor and electronic device using laminated tape | |
| CN208570282U (en) | A kind of switching mode power supply transformer and its magnetic core | |
| KR101201291B1 (en) | Transformer with backward double winding coil transformer for protceting electro-static shield, surge and eletromagnetic noise | |
| US20220108823A1 (en) | Inductor | |
| Alabakhshizadeh et al. | Air gap fringing flux reduction in a high frequency inductor for a solar inverter | |
| US20140085757A1 (en) | Surge blocking inductor | |
| CN209357573U (en) | The inductance balance magnetic core and three-phase reactor of three-phase reactor | |
| CN201854113U (en) | Coil and motor provided with same | |
| CN213070768U (en) | Combined magnetic core, three-phase reactor inductance magnetic core and three-phase reactor | |
| US20060148313A1 (en) | Circulatory current choke | |
| CN209401450U (en) | Common mode reactor | |
| CN210896941U (en) | Framework structure of transformer |
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 |