CN102956344B - A kind of composite cores structure and magnetics - Google Patents
A kind of composite cores structure and magnetics Download PDFInfo
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- CN102956344B CN102956344B CN201210433257.7A CN201210433257A CN102956344B CN 102956344 B CN102956344 B CN 102956344B CN 201210433257 A CN201210433257 A CN 201210433257A CN 102956344 B CN102956344 B CN 102956344B
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Abstract
The embodiment of the invention discloses a kind of composite cores structure and magnetics, be used for reducing core loss, improve applying frequency.The embodiment of the present invention includes: the first magnetic core component and the second magnetic core component, first magnetic core component is made up of the soft magnetic materials of low magnetic permeability, second magnetic core component is made up of the soft magnetic materials of high magnetic permeability, and the first magnetic core component and the second magnetic core component compound also form flux circuit.
Description
Technical field
The present invention relates to compound magnetic technology field, especially relate to a kind of composite cores structure and magnetics.
Background technology
In Switching Power Supply, magnetics (or magnetic cell) is energy conversion and the core component stored, its property relationship is to the efficiency of whole Switching Power Supply and performance, as one of main loss device, magnetics is increasingly subject to the attention of hardware designer, and magnetic core is as the core component of magnetics, its performance is related to the quality of the performance of magnetics especially, how to reduce the loss of magnetics, the efficiency of lifting switch power supply and overall performance become crucial, meanwhile, cost needs a key factor of consideration when being also design core structure.In traditional magnetics design, we should so consider to use single magnetic core material to carry out the design of magnetics, the design of this non-exempt from customs examination magnetics brings bottleneck, it is unable to reach the best result of use of magnetics, therefore, compound magnetic technology is answered but raw, utilizes the compound between unlike material magnetic core, or it is hybrid process between different magnetic materials, one-body molded, it will to improve the overall performance of magnetics.
Development along with current industry compound magnetic technology, compound magnetic technology will increasingly come into one's own, compound magnetic designing technique will necessitate, but inventor finds that in the process realize the embodiment of the present invention composite cores structure of most magnetics is in order to avoid causing that owing to arranging air gap winding loss increases, and eliminates the setting of air gap, but, although it reduces winding loss, but causing the increase of core loss, thus the total losses of magnetics increase, and applying frequency is relatively low.
Summary of the invention
Embodiments provide a kind of composite cores structure and magnetics, be used for reducing core loss, improve applying frequency.
First aspect present invention provides a kind of composite cores structure, it may include:
First magnetic core component and the second magnetic core component, described first magnetic core component is made up of the soft magnetic materials of low magnetic permeability, described second magnetic core component is made up of the soft magnetic materials of high magnetic permeability, and described first magnetic core component and described second magnetic core component compound also form flux circuit.
In the implementation that the first is possible, the soft magnetic materials of described low magnetic permeability is nickel zinc NiZn ferrite and/or alloy magnetic powder, and the soft magnetic materials of described high magnetic permeability is one or more in manganese zinc (Mn-Zn) ferrite, non-crystalline material, nanocrystalline material, silicon steel.
In conjunction with the first possible implementation of first aspect, in the implementation that the second is possible, described alloy magnetic powder is one or more in ferrocart core, ferrum silicon, ferrum sial, ferrum nickel, ferrum nickel molybdenum, amorphous core.
In the implementation that the third is possible, the pcrmeability of the soft magnetic materials of described low magnetic permeability equals to or less than 250, and the pcrmeability of the soft magnetic materials of described high magnetic permeability is more than 800.
The implementation possible in conjunction with the first possible implementation of first aspect or first aspect or the second of first aspect or the third possible implementation of first aspect, in the 4th kind of possible implementation, described first magnetic core component or the second magnetic core component is U-shaped or E type or I shape or arcuation are arranged.
Second aspect present invention provides a kind of magnetics, it may include:
Composite cores structure in first aspect or implementation that the first is possible or the possible implementation of the second or the third possible implementation or the 4th kind of possible implementation, also including least one set coiled wire-wound coil, described coiled wire-wound coil is set around in described composite cores structure.
In the implementation that the first is possible, described coiled wire-wound coil is set around on described first magnetic core component and/or described second magnetic core component.
In the implementation that the second is possible, the material of described coiled wire-wound coil is the one in circular copper wire, litz wire, twisted wire, flat type copper wire, Copper Foil, printed circuit board (PCB) layers of copper.
In conjunction with the implementation that the first possible implementation of second aspect or second aspect or the second of second aspect are possible, in the implementation that the third is possible, described magnetics is inducer or transformator.
As can be seen from the above technical solutions, the composite cores structure of embodiment of the present invention offer and magnetics, utilize low magnetic permeability soft magnetic materials and high magnetic permeability soft magnetic materials compound, constituting composite magnetic circuit magnetic core (namely forming flux circuit), this structure need not offer air gap, reduces leakage magnetic flux, the electromagnetic interference of surrounding is obtained reduction, electromagnetic interference EMI characteristic is better, and simplifies processing technique, improves magnetics concordance；Owing to the magnetic resistance of the magnetic core component of low magnetic permeability material is relatively big, replace the magnetic resistance of air gap, it is possible to reduce winding eddy current loss, thus core loss have also been obtained reduction；It addition, the materials application frequency of compound is higher, it is suitably applied under high frequency environment.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below the accompanying drawing that embodiment describes required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of a kind of composite cores structure that Fig. 1 provides for the embodiment of the present invention；
Another structural representation of a kind of composite cores structure that Fig. 2 provides for the embodiment of the present invention；
Another structural representation of a kind of composite cores structure that Fig. 3 provides for the embodiment of the present invention；
The structural representation of a kind of magnetics that Fig. 4 provides for the embodiment of the present invention；
Another structural representation of a kind of composite cores structure that Fig. 5 provides for the embodiment of the present invention；
Another structural representation of a kind of composite cores structure that Fig. 6 provides for the embodiment of the present invention；
Fig. 7 a and Fig. 7 b all illustrates the structural representation of a kind of magnetics that the embodiment of the present invention provides；
Fig. 8 a to Fig. 8 d all illustrates the structural representation of a kind of magnetics that the embodiment of the present invention provides；
Another structural representation of a kind of composite cores structure that Fig. 9 provides for the embodiment of the present invention；
Another structural representation of a kind of magnetics that Figure 10 provides for the embodiment of the present invention；
Figure 11 is the 3D phantom schematic diagram cutting into existing transformer model；
The 3D phantom schematic diagram of the transformer model that Figure 12 provides for cutting cost inventive embodiments.
Detailed description of the invention
Embodiments provide a kind of composite cores structure and magnetics, be used for reducing core loss, improve applying frequency.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
It is described in detail individually below.
Embodiment one:
Refer to a kind of composite cores structure 1 schematic diagram that Fig. 1, Fig. 1 provide for the embodiment of the present invention, wherein, described composite cores structure 1 includes:
First magnetic core component 11 and the second magnetic core component 12, described first magnetic core component 11 is made up of the soft magnetic materials of low magnetic permeability, described second magnetic core component 12 is made up of the soft magnetic materials of high magnetic permeability, and described first magnetic core component 11 and the second magnetic core component 12 compound also form flux circuit.
In embodiments of the present invention, the soft magnetic materials compound of the soft magnetic materials of low magnetic permeability and high magnetic permeability, form flux circuit, the second magnetic core component 12 that the soft magnetic materials of the first magnetic core component 11 that namely described composite cores structure 1 is made by the soft magnetic materials of low magnetic permeability and high magnetic permeability is made is composed in series, namely the first magnetic core component 11 and the second magnetic core component 12 constitute composite magnetic circuit magnetic core (or compound magnetic magnetic circuit), it can be applicable to make magnetics, such as inducer, transformator etc., be not especially limited herein；
Wherein, ferrite be the oxide by ferrum and other dispensings sintering form, generally can be divided into permanent-magnet ferrite and soft magnetic ferrite two kinds；Pcrmeability (magneticpermeability) indicates that the physical quantity of magnetizing mediums magnetic, conventional sign μ represents, in the embodiment of the present invention, pcrmeability refers to the relative permeability of material, and relative permeability is exactly the pcrmeability ratio with permeability of vacuum of material；
It is understandable that, so-called high-permeability material, as the term suggests being exactly the higher magnetic material of pcrmeability, there is the feature of the low saturation magnetic induction of high magnetic permeability, the magnetic material of current this high magnetic permeability is very general, such as ferrite, silicon steel, amorphous and nanocrystalline etc., the pcrmeability of some material can up to up to ten thousand.For Ferrite Material, pcrmeability is many more than 1000, have up to up to ten thousand, can apply to common mode inductance, wherein, comparatively conventional Ferrite Material, namely pcrmeability FERRITE CORE below 3000, be used for makes transformator and inducer more, in actual applications, owing to the pcrmeability of high-permeability material is higher, in order to improve the anti-saturation ability of magnetics, it is necessary to offer corresponding air gap in magnetic circuit, increase magnetic circuit reluctance, reduce sensibility reciprocal with this, improve the anti-direct current saturability of magnetics；On the contrary, low magnetic permeability material is exactly the magnetic material that pcrmeability is relatively low, current low magnetic permeability material mainly has powder core, including ferrum silicon, ferrum sial, the types such as ferrocart core, they have low magnetic permeability, high saturation magnetic induction, there is the feature of distributed air gap, the excursion of pcrmeability is more than tens to one hundred, modal pcrmeability type is 26, 40, 60, 80, 90, 120 etc., the magnetic core of different pcrmeabilities can be controlled by the different incorporations of the organic or inorganic material of magnetic material, the resistivity of these powder cores is relatively low, core loss is much larger compared with ferrite, but its saturation magnetic induction is significantly high, more than 1 tesla can be reached, anti-direct current saturability is strong, and there is distributed air gap, dispersing flux in magnetic circuit is little, the loss of winding is also less.
Seen from the above description, the composite cores structure that the embodiment of the present invention provides, utilize low magnetic permeability soft magnetic materials and high magnetic permeability soft magnetic materials compound, constituting composite magnetic circuit magnetic core (namely forming flux circuit), this structure need not offer air gap, reduces leakage magnetic flux, the electromagnetic interference of surrounding is obtained reduction, electromagnetic interference EMI characteristic is better, and simplifies processing technique, improves magnetics concordance；Owing to the magnetic resistance of the magnetic core component of low magnetic permeability material is relatively big, replace the magnetic resistance of air gap, it is possible to reduce winding eddy current loss, thus core loss have also been obtained reduction；It addition, the materials application frequency of compound is higher, it is suitably applied under high frequency environment.
Embodiment two:
Preferably, the present embodiment provides composite cores structure 1 as shown in Figure 1, arranges in UI type；Shown UI type composite cores structure 1 includes the magnetic core component of I type setting and the magnetic core component of U-shaped setting, wherein, the magnetic core component that described I type is arranged is the first magnetic core component 11 being made up of the soft magnetic materials of low magnetic permeability, the magnetic core component of described U-shaped setting is the second magnetic core component 12 being made up of the soft magnetic materials of high magnetic permeability, described first magnetic core component 11 and the second magnetic core component 12 compound, constitutes UI type compound magnetic magnetic circuit magnetic core；
Further, the soft magnetic materials of the low magnetic permeability constituting the first magnetic core component 11 can for one or more in the core material of other low magnetic permeabilities such as nickel zinc NiZn ferrite, alloy magnetic powder；The soft magnetic materials of the high magnetic permeability constituting the second magnetic core component 12 for one or more in the core material of other high magnetic permeabilities such as manganese zinc (Mn-Zn) ferrite, non-crystalline material, nanocrystalline material, silicon steel, can be not especially limited herein；
Further, described alloy magnetic powder can be one or more in other alloy magnetic powders such as ferrocart core, ferrum silicon, ferrum sial, ferrum nickel, ferrum nickel molybdenum, amorphous core.
Preferably, in the embodiment of the present invention, the pcrmeability of the soft magnetic materials of described low magnetic permeability can equal to or less than 250, and the pcrmeability of the soft magnetic materials of described high magnetic permeability can more than 800.
It is understandable that, owing to ferritic resistivity is higher, core loss in high frequency is less, therefore can apply under high frequency, preferably, the present embodiment adopts NiZn ferrite (the first magnetic core component 11) and MnZn ferrite (the second magnetic core component 12) compound, wherein, MnZn ferrite at present can under the highest high frequency environment being applied to 5MHz, NiZn ferrite can apply under GHz environment, NiZn ferritic pcrmeability excursion is very big, the pcrmeability of NiZn Ferrite Material in the market range for tens to several thousand, and the core loss under its high frequency is only small, therefore the composite cores structure 1 that both soft magnetic ferrites are composited is suitably applied under high frequency environment；Additionally, owing to the ferritic pcrmeability of NiZn is a bit smaller, according to magnetic circuit reluctance principle, the NiZn ferrite magnetic circuit of low magnetic permeability can be utilized to replace air gap, thus avoiding out air gap, reducing dispersing flux, reducing winding loss, again owing to its applying frequency is higher, compensate for the shortcoming that powder core applying frequency is low.
It is understood that in the present embodiment, composite cores structure 1 is arranged in UI type, as it is shown in figure 1, wherein, the first magnetic core component 11 is arranged for I type, and the second magnetic core component 12 is U-shaped setting；In some embodiments, the composite cores structure 1 arranged in UI type, it is also possible to being that the first magnetic core component 11 is set to U-shaped, the second magnetic core component 12 is set to I type, and its profile is arranged not to be affected its functional realiey；
It is contemplated that the composite cores structure 1 that UI type is arranged is similar to the composite cores structure 1 that UU type is arranged, please also refer to the structural representation of the composite cores structure 1 that UU type as shown in Figure 2 is arranged；It should be noted that, in some embodiments, the composite cores structure 1 that the embodiment of the present invention provides, its profile arranges UI type or the UU type of the very standard that is not necessarily, such as, composite cores structure 1 shown in Fig. 3 is also arrange for UU type, but the first magnetic core component 11 and the second magnetic core component 12 size design different (namely the both sides magnetic post of the first magnetic core component 11 (the second magnetic core component 12) of U-shaped setting to be grown) than the both sides magnetic post of the second magnetic core component 12 (the first magnetic core component 11) of U-shaped setting, or U-shaped both sides magnetic post could be arranged to different length etc., the functional realiey of composite cores structure 1 is not resulted in impact, fall within the scope of protection of the invention.
The composite cores structure 1 that the embodiment of the present invention provides, it can be applicable to make magnetics 2, to promote the characteristic of magnetics 2；Described magnetics 2, except including composite cores structure 1, also includes least one set coiled wire-wound coil 13, and described coiled wire-wound coil 13 is set around in described composite cores structure 1.
Further, described coiled wire-wound coil 13 is set around on described first magnetic core component 11 and/or described second magnetic core component 12；Such as, in some embodiments, magnetics 2 as shown in Figure 4, include UI type composite cores structure 1 as shown in Figure 1, two groups of coiled wire-wound coils 13 (i.e. winding) it are provided with, rotating around on the both sides magnetic post being located at U-shaped second magnetic core component 12 in described magnetics 2；It is contemplated that, according to magnetics 2 application in practice, one group of coiled wire-wound coil 13 can be set inside it, two or more sets coiled wire-wound coils 13 can also be set, and coiled wire-wound coil 13 can be set around on the both sides magnetic post of U-shaped second magnetic core component 12, can also be set around on I type the first magnetic core component 11 or U-shaped second magnetic core component 12 following on, similarly, magnetics including composite cores structure 1 as shown in Figure 2 or Figure 3, its coiled wire-wound coil 13 can also be configured with reference to magnetics 2 as shown in Figure 4, the functional realiey of composite cores structure 1 is not resulted in impact, the position of quantity and coiled wire-wound coil 13 winding that magnetics 2 is arranged coiled wire-wound coil 13 by the embodiment of the present invention is not especially limited.
Preferably, described coiled wire-wound coil 13 has single or multiple lift structure, and the material of coiled wire-wound coil 13 can be the one in circular copper wire, litz wire, twisted wire, flat type copper wire, Copper Foil, printed circuit board (PCB) layers of copper.
It is understood that in actual applications, in order to obtain suitable sensibility reciprocal and anti-magnetic bias characteristic, it is possible to the length of magnetic path (indicating the length of magnetic path with dotted line in Fig. 4) and the core cross section that arbitrarily change composite magnetic circuit magnetic core as required amass.
Another it is contemplated that, the magnetics 2 that the embodiment of the present invention provides can be but be not limited to inducer (including conventional inductor, film inductor) or transformator (including conventional transformer, plane voltage device), and it can be used for inductive energy storage, EMI filtering, energy transmission, power conversion etc..The magnetic core magnetic circuit of low magnetic permeability can be used to control the sensibility reciprocal of magnetics 2 and anti-saturation ability, it is not necessary to opens air gap, reduces leakage magnetic flux, reduces winding loss, improves the EMI characteristic of magnetics；On some embodiment, it is also possible to reduce cost, raising efficiency.
Seen from the above description, composite cores structure 1 that the embodiment of the present invention provides and include the magnetics 2 of composite cores structure 1, utilize low magnetic permeability soft magnetic materials and high magnetic permeability soft magnetic materials compound, constituting composite magnetic circuit magnetic core (namely forming flux circuit), this structure need not offer air gap, reduces leakage magnetic flux, the electromagnetic interference of surrounding is obtained reduction, electromagnetic interference EMI characteristic is better, and simplifies processing technique, improves magnetics concordance；Owing to the magnetic resistance of the magnetic core component of low magnetic permeability material is relatively big, replace the magnetic resistance of air gap, it is possible to reduce winding eddy current loss, thus core loss have also been obtained reduction；It addition, the materials application frequency of compound is higher, it is suitably applied under high frequency environment.
Embodiment three:
Refer to a kind of another structural representation of composite cores structure 1 that Fig. 5, Fig. 5 provide for the embodiment of the present invention, wherein, described composite cores structure 1 is arranged in EI type, it is shown that EI type composite cores structure 1 includes:
The magnetic core component that the magnetic core component of I type setting and E type are arranged, wherein, the magnetic core component that described I type is arranged is the first magnetic core component 11 being made up of the soft magnetic materials of low magnetic permeability, the magnetic core component that described E type is arranged is the second magnetic core component 12 being made up of the soft magnetic materials of high magnetic permeability, described first magnetic core component 11 and the second magnetic core component 12 compound, constitutes UI type compound magnetic magnetic circuit magnetic core；
Further, the soft magnetic materials of the low magnetic permeability constituting the first magnetic core component 11 can for one or more in the core material of other low magnetic permeabilities such as NiZn ferrite, alloy magnetic powder；The soft magnetic materials of the high magnetic permeability constituting the second magnetic core component 12 can for one or more in the core material of other high magnetic permeabilities such as MnZn ferrite, non-crystalline material, nanocrystalline material, silicon steel；Described alloy magnetic powder can be one or more in other alloy magnetic powders such as ferrocart core, ferrum silicon, ferrum sial, ferrum nickel, ferrum nickel molybdenum, amorphous core, is not especially limited herein.
Preferably, in the embodiment of the present invention, the pcrmeability of the soft magnetic materials of described low magnetic permeability can equal to or less than 250, and the pcrmeability of the soft magnetic materials of described high magnetic permeability can more than 800；
It is understandable that, owing to ferritic resistivity is higher, core loss in high frequency is less, therefore can apply under high frequency, preferably, in the present embodiment, the soft magnetic materials of low magnetic permeability adopts NiZn ferrite, the soft magnetic materials of high magnetic permeability adopts MnZn ferrite, wherein, MnZn ferrite at present can under the highest high frequency environment being applied to 5MHz, NiZn ferrite can apply under GHz environment, NiZn ferritic pcrmeability excursion is very big, the pcrmeability of NiZn Ferrite Material in the market range for tens to several thousand, and the core loss under its high frequency is only small, therefore the composite cores structure 1 that both soft magnetic ferrites are composited is suitably applied under high frequency environment；Additionally, owing to the ferritic pcrmeability of NiZn is a bit smaller, according to magnetic circuit reluctance principle, the NiZn ferrite magnetic circuit of low magnetic permeability can be utilized to replace air gap, thus avoiding out air gap, reducing dispersing flux, reducing winding loss, again owing to its applying frequency is higher, compensate for the shortcoming that powder core applying frequency is low.
It is understood that in the present embodiment, composite cores structure 1 is arranged in EI type, as it is shown in figure 5, wherein, the first magnetic core component 11 is arranged for I type, and the second magnetic core component 12 is arranged for E type；In some embodiments, the composite cores structure 1 arranged in EI type, the first magnetic core component 11 could be arranged to E type, and the second magnetic core component 12 is it can also be provided that I type, and its profile is arranged not to be affected its functional realiey；
It is contemplated that, the composite cores structure 1 that EI type is arranged is similar to the composite cores structure 1 that EE type is arranged, as shown in Figure 6, for the schematic diagram of the composite cores structure 1 that EE type is arranged, namely the first magnetic core component 11 is arranged for E type, and the second magnetic core component 12 is also arranged for E type；It should be noted that, in some embodiments, the composite cores structure 1 that the embodiment of the present invention provides, its profile arranges EI type or the EE type of the very standard that is not necessarily, such as, in the composite cores structure 1 that EE type is arranged, its first magnetic core component 11 and the second magnetic core component 12 size design different (namely the both sides magnetic post of the second magnetic core component 12 (the first magnetic core component 11) that the both sides magnetic post of the first magnetic core component 11 (the second magnetic core component 12) that E type is arranged is arranged than E type to be grown), or the both sides magnetic post of E type or middle magnetic post could be arranged to different length etc., the functional realiey of composite cores structure 1 is not resulted in impact, fall within the scope of protection of the invention.
The composite cores structure 1 that the embodiment of the present invention provides, it can be applicable to make magnetics 2, to promote the characteristic of magnetics 2；Described magnetics 2, except including composite cores structure 1, also includes least one set coiled wire-wound coil 13, and described coiled wire-wound coil 13 is set around in described composite cores structure 1.
Further, described coiled wire-wound coil 13 is set around on described first magnetic core component 11 and/or described second magnetic core component 12；Such as, in some embodiments, please also refer to magnetics 2 shown in Fig. 7 a and Fig. 7 b, magnetics 2 shown in Fig. 7 a includes EI type composite cores structure 1 as shown in Figure 5, being provided with one group of coiled wire-wound coil 13 in described magnetics 2, this coiled wire-wound coil 13 is set around on the middle magnetic post of E type the second magnetic core component 12；It is contemplated that, according to magnetics 2 application in practice, one group of coiled wire-wound coil 13 can be set inside it, it is also possible to arranges two or more sets coiled wire-wound coils 13, and coiled wire-wound coil 13 can be set around on the both sides magnetic post of E type the second magnetic core component 12, it is referred to magnetics 2 as shown in Figure 7b；In some embodiments, coiled wire-wound coil 13 can also be set around on I type the first magnetic core component 11 or E type the second magnetic core component 12 following on, similarly, magnetics including composite cores structure 1 as shown in Figure 6, its coiled wire-wound coil 13 can also be configured with reference to magnetics 2 as shown in figs. 7 a and 7b, the functional realiey of composite cores structure 1 is not resulted in impact, similarly, the position of quantity and coiled wire-wound coil 13 winding that magnetics 2 is arranged coiled wire-wound coil 13 by the embodiment of the present invention is not especially limited.
Preferably, described coiled wire-wound coil 13 has single or multiple lift structure, and the material of coiled wire-wound coil 13 can be the one in circular copper wire, litz wire, twisted wire, flat type copper wire, Copper Foil, printed circuit board (PCB) layers of copper.
It is understandable that, the composite cores structure 1 of embodiment of the present invention offer and relevant magnetics 2 thereof, in actual applications, in order to obtain suitable sensibility reciprocal and anti-magnetic bias characteristic, it is possible to the length of magnetic path (indicating the length of magnetic path with dotted line in Fig. 7 a) and the core cross section that arbitrarily change composite magnetic circuit magnetic core as required amass；The demand of design can also be reached by different composite magnetic circuit structures, such as, it is referred to Fig. 8 a, Fig. 8 b and Fig. 8 c, all illustrate that the first magnetic core component 11 that can adopt low magnetic permeability soft magnetic materials is as magnetic post in the middle of magnetic core (or claiming center pillar magnetic core), wherein, as shown in Fig. 8 a and Fig. 8 c, coiled wire-wound coil 13 can on the middle magnetic post being located at composite cores structure 1, as shown in Figure 8 b, (two groups) coiled wire-wound coil 13 can on the both sides magnetic post being located at composite cores structure 1；In some embodiments, the first magnetic core component 11 of low magnetic permeability soft magnetic materials can also be used as magnetic core both sides magnetic post (or claiming side column magnetic core), namely the second magnetic core component 12 is arranged in I shape, wherein, coiled wire-wound coil 13 around being located on the magnetic post of composite cores structure 1 both sides, can be referred to shown in Fig. 8 d.
Separately it should be noted that, according to practical application, 1 need of composite cores structure meet the relevant parameter (such as sensibility reciprocal, anti-direct current biasing ability etc.) of the magnetics of its application and design, and its outward appearance can be different setting, and its functional realiey is not resulted in impact；Meanwhile, the position of quantity and coiled wire-wound coil 13 winding that magnetics 2 is arranged coiled wire-wound coil 13 by the embodiment of the present invention is not especially limited.
Another it is contemplated that, the magnetics 2 that the embodiment of the present invention provides can be but be not limited to inducer (including conventional inductor, film inductor) or transformator (including conventional transformer, plane voltage device), and it can be used for inductive energy storage, EMI filtering, energy transmission, power conversion etc..The magnetic core magnetic circuit of low magnetic permeability can be used to control the sensibility reciprocal of magnetics 2 and anti-saturation ability, it is not necessary to opens air gap, reduces leakage magnetic flux, reduces winding loss, improves the EMI characteristic of magnetics；On some embodiment, it is also possible to reduce cost, raising efficiency.
Seen from the above description, composite cores structure 1 that the embodiment of the present invention provides and include the magnetics 2 of composite cores structure 1, utilize low magnetic permeability soft magnetic materials and high magnetic permeability soft magnetic materials compound, constituting composite magnetic circuit magnetic core (namely forming flux circuit), this structure need not offer air gap, reduces leakage magnetic flux, the electromagnetic interference of surrounding is obtained reduction, electromagnetic interference EMI characteristic is better, and simplifies processing technique, improves magnetics concordance；Owing to the magnetic resistance of the magnetic core component of low magnetic permeability material is relatively big, replace the magnetic resistance of air gap, it is possible to reduce winding eddy current loss, thus core loss have also been obtained reduction；It addition, the materials application frequency of compound is higher, it is suitably applied under high frequency environment.
Embodiment four:
Refer to Fig. 9, a kind of another structural representation of composite cores structure 1 that Fig. 9 provides for the embodiment of the present invention, wherein, described composite cores structure 1 is arranged in the form of a ring, shown composite cores structure 1 includes: the second magnetic core component 12 that the first magnetic core component 11 of arcuation setting and arcuation are arranged, wherein, described first magnetic core component 11 is made up of the soft magnetic materials of low magnetic permeability, described second magnetic core component 12 is made up of the soft magnetic materials of high magnetic permeability, described first magnetic core component 11 and the second magnetic core component 12 compound, constitutes the compound magnetic magnetic circuit magnetic core of ring-type.
Further, the soft magnetic materials of the low magnetic permeability constituting the first magnetic core component 11 can for one or more in the core material of other low magnetic permeabilities such as NiZn ferrite, alloy magnetic powder；The soft magnetic materials of the high magnetic permeability constituting the second magnetic core component 12 can for one or more in the core material of other high magnetic permeabilities such as MnZn ferrite, non-crystalline material, nanocrystalline material, silicon steel；Described alloy magnetic powder can be one or more in other alloy magnetic powders such as ferrocart core, ferrum silicon, ferrum sial, ferrum nickel, ferrum nickel molybdenum, amorphous core, is not especially limited herein.
Preferably, in the embodiment of the present invention, the pcrmeability of the soft magnetic materials of described low magnetic permeability can equal to or less than 250, and the pcrmeability of the soft magnetic materials of described high magnetic permeability can more than 800；
Preferably, owing to ferritic resistivity is higher, core loss in high frequency is less, therefore can apply under high frequency, therefore in the present embodiment, the soft magnetic materials of low magnetic permeability adopts NiZn ferrite, the soft magnetic materials of high magnetic permeability adopts MnZn ferrite, wherein, MnZn ferrite at present can under the highest high frequency environment being applied to 5MHz, NiZn ferrite can apply under GHz environment, NiZn ferritic pcrmeability excursion is very big, the pcrmeability of NiZn Ferrite Material in the market range for tens to several thousand, and the core loss under its high frequency is only small, therefore the composite cores structure 1 that both soft magnetic ferrites are composited is suitably applied under high frequency environment；Additionally, owing to the ferritic pcrmeability of NiZn is a bit smaller, according to magnetic circuit reluctance principle, the NiZn ferrite magnetic circuit of low magnetic permeability can be utilized to replace air gap, thus avoiding out air gap, reducing dispersing flux, reducing winding loss, again owing to its applying frequency is higher, compensate for the shortcoming that powder core applying frequency is low.
It should be noted that, in the composite cores structure 1 as shown in Figure 9 that the embodiment of the present invention provides, its first magnetic core component 11 and the design of the second magnetic core component 12 size can be different, the arc length of the second magnetic core component 12 (the first magnetic core component 11) that the first magnetic core component 11 (the second magnetic core component 12) that namely arcuation is arranged is arranged with arcuation is different, it can also be provided that arc length is the same, the functional realiey of composite cores structure 1 is not resulted in impact, is not especially limited herein.
Similarly, described composite cores structure 1, it can be applicable to make magnetics 2, to promote the characteristic of magnetics 2；Described magnetics 2, except including composite cores structure 1 as shown in Figure 9, also includes least one set coiled wire-wound coil 13, and described coiled wire-wound coil 13 is set around in described composite cores structure 1；In some embodiments, such as Figure 10, described coiled wire-wound coil 13 is set around the outside of the first magnetic core component 11 and the second magnetic core component 12.
Preferably, described coiled wire-wound coil 13 has single or multiple lift structure, and the material of coiled wire-wound coil 13 can be the one in circular copper wire, litz wire, twisted wire, flat type copper wire, Copper Foil, printed circuit board (PCB) layers of copper.
It is understandable that, the composite cores structure 1 of embodiment of the present invention offer and relevant magnetics 2 thereof, in actual applications, in order to obtain suitable sensibility reciprocal and anti-magnetic bias characteristic, it is possible to the length of magnetic path and the core cross section that arbitrarily change composite magnetic circuit magnetic core as required amass；
Separately it should be noted that, according to practical application, 1 need of composite cores structure meet the relevant parameter (such as sensibility reciprocal, anti-direct current biasing ability etc.) of the magnetics of its application and design, and its outward appearance can be different setting, and its functional realiey is not resulted in impact；Meanwhile, the position of quantity and coiled wire-wound coil 13 winding that magnetics 2 is arranged coiled wire-wound coil 13 by the embodiment of the present invention is not especially limited.
Another it is contemplated that, the magnetics 2 that the embodiment of the present invention provides can be but be not limited to inducer (including conventional inductor, film inductor) or transformator (including conventional transformer, plane voltage device), and it can be used for inductive energy storage, EMI filtering, energy transmission, power conversion etc..The magnetic core magnetic circuit of low magnetic permeability can be used to control the sensibility reciprocal of magnetics 2 and anti-saturation ability, it is not necessary to opens air gap, reduces leakage magnetic flux, reduces winding loss, improves the EMI characteristic of magnetics；On some embodiment, it is also possible to reduce cost, raising efficiency.
Seen from the above description, composite cores structure 1 that the embodiment of the present invention provides and include the magnetics 2 of composite cores structure 1, utilize low magnetic permeability soft magnetic materials and high magnetic permeability soft magnetic materials compound, constituting composite magnetic circuit magnetic core (namely forming flux circuit), this structure need not offer air gap, reduces leakage magnetic flux, the electromagnetic interference of surrounding is obtained reduction, electromagnetic interference EMI characteristic is better, and simplifies processing technique, improves magnetics concordance；Owing to the magnetic resistance of the magnetic core component of low magnetic permeability material is relatively big, replace the magnetic resistance of air gap, it is possible to reduce winding eddy current loss, thus core loss have also been obtained reduction；It addition, the materials application frequency of compound is higher, it is suitably applied under high frequency environment.
In order to become more apparent upon technical solution of the present invention, below with a concrete application scenarios for example, the application present invention providing the emulation testing of the magnetics of composite cores structure be analyzed illustrating, under this scene, the magnetics of application composite cores structure is transformator；
Hereinafter the transformator (being called for short new compound magnetic transformer) of existing general transformer model (being called for short former transformator) and built-in composite cores structure of the present invention is carried out respectively simulation analysis, and emulation data has been made corresponding contrast:
In this test, core structure in former transformator and new compound magnetic transformer is UI type and arranges, please also refer to Figure 11 and Figure 12, wherein, Figure 11 is the 3D phantom schematic diagram after cutting into existing transformer model 1/4, figure is offer the position of air gap by circle marked position, the 3D phantom schematic diagram after the transformer model 1/4 that Figure 12 provides for cutting cost inventive embodiments；It should be noted that, the two phantom, the size dimension of magnetic core is constant, winding construction does not also change, simply change the magnetic core material of I type setting unit, i.e. core structure in new compound magnetic transformer, has changed the NiZn ferrite of low magnetic permeability value into by the MnZn ferrite in the core structure of former transformator, and emulation data are referred to table one:
Table one
In upper table, original scheme is the design of former Transformer core structure, new compound magnetic scheme is the design of new compound magnetic transformer core structure, and wherein, Ploss is power attenuation, Coreloss is core loss, Solidloss is winding loss, and Ptatal is total losses, and MnZn is manganese-zinc ferrite, NiZn is nickel-zinc ferrite, and μ r is initial permeability；
By the emulation data of upper two kinds of transformators of table, the coreloss of compound magnetic design about reduces 0.5W, and this is owing to have employed the ferritic reason of less NiZn of core loss under high frequency；Winding copper loss reduces about 0.3W, and this is owing to new compound magnetic scheme need not open air gap, reducing leakage magnetic flux, reduces the eddy-current loss of winding, thus causing that total losses reduce about 0.8W, about reducing 18.5%.
From above-mentioned emulation testing, composite cores structure that the embodiment of the present invention provides and include the magnetics of composite cores structure, utilize low magnetic permeability soft magnetic materials NiZn ferrite and high magnetic permeability soft magnetic materials MnZn ferrite compound, constituting composite magnetic circuit magnetic core, this structure need not offer air gap, reduces leakage magnetic flux, the electromagnetic interference of surrounding is obtained reduction, electromagnetic interference EMI characteristic is better, and simplifies processing technique, improves magnetics concordance；Owing to the magnetic resistance of the magnetic core component of low magnetic permeability material is relatively big, replace the magnetic resistance of air gap, it is possible to reduce winding eddy current loss, thus core loss have also been obtained reduction；It addition, NiZn ferrite is higher with the ferritic applying frequency of MnZn, it is suitably applied under megahertz MHz high frequency environment.
Above a kind of composite cores structure provided by the present invention and magnetics are described in detail, for one of ordinary skill in the art, thought according to the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this specification content should not be construed as limitation of the present invention.
Claims (8)
1. a composite cores structure, it is characterised in that including:
First magnetic core component and the second magnetic core component, described first magnetic core component is made up of the soft magnetic materials of low magnetic permeability, described second magnetic core component is made up of the soft magnetic materials of high magnetic permeability, described first magnetic core component and described second magnetic core component series connection compound form flux circuit, wherein, the pcrmeability of the soft magnetic materials of described low magnetic permeability equals to or less than 80, and the pcrmeability of the soft magnetic materials of described high magnetic permeability is more than 1100.
2. composite cores structure according to claim 1, it is characterized in that, the soft magnetic materials of described low magnetic permeability is nickel zinc NiZn ferrite and/or alloy magnetic powder, and the soft magnetic materials of described high magnetic permeability is one or more in manganese zinc (Mn-Zn) ferrite, non-crystalline material, nanocrystalline material, silicon steel.
3. composite cores structure according to claim 2, it is characterised in that described alloy magnetic powder is one or more in ferrocart core, ferrum silicon, ferrum sial, ferrum nickel, ferrum nickel molybdenum, amorphous core.
4. the composite cores structure according to any one of claims 1 to 3, it is characterised in that described first magnetic core component or the second magnetic core component is U-shaped or E type or I shape or arcuation are arranged.
5. a magnetics, it is characterised in that include the composite cores structure as described in any one of Claims 1-4, also includes least one set coiled wire-wound coil, and described coiled wire-wound coil is set around in described composite cores structure.
6. magnetics according to claim 5, it is characterised in that described coiled wire-wound coil is set around on described first magnetic core component and/or described second magnetic core component.
7. magnetics according to claim 5, it is characterised in that the material of described coiled wire-wound coil is the one in circular copper wire, litz wire, twisted wire, flat type copper wire, Copper Foil, printed circuit board (PCB) layers of copper.
8. the magnetics according to any one of claim 5 to 7, it is characterised in that described magnetics is inducer or transformator.
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Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104103402A (en) * | 2013-04-01 | 2014-10-15 | 台达电子工业股份有限公司 | Transformer |
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| EP4152351A4 (en) * | 2020-06-24 | 2023-07-26 | Huawei Technologies Co., Ltd. | Electrical component, circuit board, and switching power supply |
| CN112489958A (en) * | 2020-11-18 | 2021-03-12 | 深圳顺络汽车电子有限公司 | Novel low-loss transformer |
| CN113219385A (en) * | 2021-04-28 | 2021-08-06 | 纵目科技（上海）股份有限公司 | Magnetic permeability test structure and test method |
| CN113593849B (en) * | 2021-07-21 | 2023-09-29 | Oppo广东移动通信有限公司 | Transformer and charging device |
| CN115583832B (en) * | 2022-09-09 | 2023-09-29 | 华为数字能源技术有限公司 | Magnetic core, preparation method thereof, common-mode inductor and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6980077B1 (en) * | 2004-08-19 | 2005-12-27 | Coldwatt, Inc. | Composite magnetic core for switch-mode power converters |
| CN1996515A (en) * | 2006-01-06 | 2007-07-11 | 三星电子株式会社 | Magnetic core, and inductor and transformer comprising the same |
| CN202454396U (en) * | 2012-03-07 | 2012-09-26 | 天通控股股份有限公司 | Composite soft magnetic core for filter |
-
2012
- 2012-11-02 CN CN201210433257.7A patent/CN102956344B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6980077B1 (en) * | 2004-08-19 | 2005-12-27 | Coldwatt, Inc. | Composite magnetic core for switch-mode power converters |
| CN1996515A (en) * | 2006-01-06 | 2007-07-11 | 三星电子株式会社 | Magnetic core, and inductor and transformer comprising the same |
| CN202454396U (en) * | 2012-03-07 | 2012-09-26 | 天通控股股份有限公司 | Composite soft magnetic core for filter |
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