CN104795224A - Magnetic integrated element and power module - Google Patents
Magnetic integrated element and power module Download PDFInfo
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- CN104795224A CN104795224A CN201410020572.6A CN201410020572A CN104795224A CN 104795224 A CN104795224 A CN 104795224A CN 201410020572 A CN201410020572 A CN 201410020572A CN 104795224 A CN104795224 A CN 104795224A
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Abstract
The embodiment of the invention discloses a magnetic integrated element and a power module to solve the problems that multiple magnetic devices occupy a large area, and the magnetic core loss is large. The magnetic integrated element comprises a first comb type magnetic core and a second comb type magnetic core. The first comb type magnetic core and the second comb type magnetic core comprise bodies and comb teeth extending from the bodies. The body of the first comb type magnetic core and the body of the second comb magnetic core are separately arranged, and the comb type teeth of the first comb type magnetic core and the comb type teeth of the second comb type magnetic core are in butt joint to form magnetic pillars. At least one magnetic pillar is wound by a winding, the magnetic pillars wound by the windings are provided with air gaps between the comb teeth of the first comb type magnetic core and the comb teeth of the second comb type magnetic core. For each magnetic pillar wound by the corresponding winding, the winding comprises a first winding wound on the first comb teeth of the first comb type magnetic core, and a second winding wound on the comb teeth of the second comb type magnetic core.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of magnetic integrated components and power module.
Background technology
At present, LLC series resonant circuit is high due to its Sofe Switch characteristic efficiency, becomes the main flow of primary power source high efficiency module.Primary power source high power module is all 1U or 2U height usually, and wherein 1U refers to 4.45 centimetres, and 2U refers to 8.9 centimetres.Because the restriction being subject to module height cannot select large scale magnetic core, common way selects highly lower multiple magnetic cores to transmit identical power.For two transformer connection in series-parallel LLC circuit, can with reference to figure 1a, Fig. 1 a is the structural representation of this LLC circuit, wherein need increase magnetic device due to Interleaved control more complicated, therefore general employing former limit windings in series, the circuit structure of vice-side winding parallel connection, and the mode adopting single-phase LLC to control realizes.
For the magnetic device inductance L r of three as shown in fig. ia, transformer (Transformer) T1 and transformer T2, implementation comparatively general is in the prior art: these three magnetic devices are discrete device, is and does not have integrated, independently three devices; Can in conjunction with reference to figure 1a and Fig. 1 b, Fig. 1 b is the cross-sectional schematic of shown three magnetic devices, and wherein, what in a magnetic device, shade direction was identical is same winding 11, usual inductance L r only has a winding 11, and transformer T1 and T2 has former secondary two windings 11 respectively.As figure, the former limit windings in series of Lr and T1, T2, the vice-side winding of T1 and T2 is in parallel, the magnetic post being wound with winding 11 in Lr, T1 and T2 offers air gap 12, three magnetic devices are except circuit connecting relation, there is not public magnetic circuit, namely there is not magnetic Field Coupling relation in magnetic device each other.In this plan of establishment, magnetic device is does not have integrated discrete device, thus it is larger to take volume; Further, without flux coupled device in circuit, namely between magnetic device without magnetic field cancellation, thus core loss also can be larger.
Summary of the invention
Embodiments providing a kind of magnetic integrated components and power module, taking for solving multiple magnetic device the problem that volume is large and core loss is large.
In view of this, first aspect present invention provides a kind of magnetic integrated components, wherein, can comprise:
First combed magnetic core, the second combed magnetic core, the comb part that wherein said first combed magnetic core and described second combed magnetic core include body part and extend out from body part;
The body part of described first combed magnetic core is separated setting with the body part of described second combed magnetic core, and the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core divide mutual docking, forms magnetic post;
Wherein, magnetic post described at least one is wound with winding, and the magnetic post being wound with winding offers air gap between the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core are divided;
One is wound with to the magnetic post of winding, described winding comprises the first winding of the comb part being wound on described first combed magnetic core, and is wound on second winding of comb part of described second combed magnetic core.
In the first possible implementation of first aspect:
Described first winding and described second winding are combined by skeleton, are wound on described magnetic post, and wherein, described first winding is different with the coiling direction of described second winding.
In the implementation that the second of first aspect is possible:
For the magnetic post not being wound with winding, between described first combed magnetic core comb part and described second combed magnetic core comb teeth part are divided, do not open air gap, to form common magnetic circuit.
In conjunction with first aspect or first aspect the first implementation or the possible implementation of the second, in the implementation that the third is possible:
If when the number offering the magnetic post of air gap is even number, then in described magnetic post, middle magnetic post is set to not open air gap;
If when the number offering the magnetic post of air gap is odd number, then in described magnetic post, the most left and the rightest magnetic post is set to not open air gap.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation:
When the number of the magnetic post offering air gap is two, then the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core divide and are oppositely arranged, and form three magnetic posts;
Wherein, middle magnetic post is not open that air gap is arranged, and both sides magnetic post respectively offers air gap, and this magnetic post offering air gap is wound with winding.
Second aspect present invention provides a kind of power module, wherein, can comprise:
DC source, current conversion element, magnetic integrated components and rectification circuit; Wherein, described magnetic integrated components is between described current conversion element and described rectification circuit;
Described magnetic device is magnetic integrated components, can comprise:
First combed magnetic core, the second combed magnetic core, the comb part that wherein said first combed magnetic core and described second combed magnetic core include body part and extend out from body part;
The body part of described first combed magnetic core is separated setting with the body part of described second combed magnetic core, and the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core divide mutual docking, forms magnetic post;
Wherein, magnetic post described at least one is wound with winding, and the magnetic post being wound with winding offers air gap between described first combed magnetic core comb part and described second combed magnetic core comb teeth part are divided;
One is wound with to the magnetic post of winding, described winding comprises the first winding of the comb part being wound on described first combed magnetic core, and is wound on second winding of comb part of described second combed magnetic core.
In the first possible implementation of second aspect:
Described first winding and described second winding are combined by skeleton, are wound on described magnetic post, and wherein, described first winding is different with the coiling direction of described second winding.
In the implementation that the second of second aspect is possible:
For the magnetic post not being wound with winding, between described first combed magnetic core comb part and described second combed magnetic core comb teeth part are divided, do not open air gap, to form common magnetic circuit.
In conjunction with second aspect or second aspect the first implementation or the possible implementation of the second, in the implementation that the third is possible:
If when the number offering the magnetic post of air gap is even number, then in described magnetic post, middle magnetic post is set to not open air gap;
If when the number offering the magnetic post of air gap is odd number, then in described magnetic post, the most left and the rightest magnetic post is set to not open air gap.
In conjunction with the third possible implementation of second aspect, in the 4th kind of possible implementation:
When the number of the magnetic post offering air gap is two, then the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core divide and are oppositely arranged, and form three magnetic posts;
Wherein, middle magnetic post is not open that air gap is arranged, and both sides magnetic post respectively offers air gap, and this magnetic post offering air gap is wound with winding.
As can be seen from the above technical solutions, a kind of magnetic integrated components that the embodiment of the present invention provides and power module have the following advantages: the comb part of the first combed magnetic core and the comb teeth part of the second combed magnetic core divide mutual docking, form magnetic post; Wherein, magnetic post described at least one is wound with winding, and the magnetic post being wound with winding offers air gap between described first combed magnetic core comb part and described second combed magnetic core comb teeth part are divided, and is undertaken integrated by existing magnetic device, reduce to take volume; Further, because the loss of magnetic core and volume are directly proportional, therefore magnetic integrated components of the present invention is relative to existing magnetic device configurations, and the loss of magnetic core can reduce greatly.
Term " first ", " second ", " the 3rd " " 4th " etc. (if existence) in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein such as can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Below by specific embodiment, be described in detail respectively.
Please refer to Fig. 2 a, the schematic diagram of a kind of magnetic integrated components that Fig. 2 a provides for the embodiment of the present invention, wherein, described magnetic integrated components can comprise:
First combed magnetic core 201, second combed magnetic core 202, the comb part that wherein said first combed magnetic core 201 and described second combed magnetic core 202 include body part and extend out from body part;
The body part 2011 of described first combed magnetic core 201 is separated setting with the body part 2021 of described second combed magnetic core 202, the comb part 2012 of described first combed magnetic core 201 and the comb part 2022 of described second combed magnetic core 202 are docked mutually, form magnetic post 203;
Wherein, magnetic post 203 described at least one is wound with winding 204, and the magnetic post being wound with winding 204 offers air gap 205 between described first combed magnetic core 201 comb part and described second combed magnetic core 202 comb teeth part are divided.
Wherein, shown air gap 205 can reduce magnetic permeability.
Be understandable that, described first combed magnetic core 201 and described second combed magnetic core 202 can comprise body part and comb part, as Fig. 2 a, wherein, the body part 2011 of the first combed magnetic core 201 is separated setting with the body part 2021 of described second combed magnetic core 202, and the comb part 2012 of described first combed magnetic core 201 and the comb part 2022 of described second combed magnetic core 202 are docked mutually; In addition, it is contemplated that the combed that described first combed magnetic core 201 and described second combed magnetic core 202 can be arranged for non-standard shapes, can arrange according to practical application scene, not do concrete restriction herein.
Another schematic diagram of the magnetic integrated components that can provide for the embodiment of the present invention with reference to figure 2b, Fig. 2 b in the lump; One is wound with to the magnetic post of winding, described winding 204 can comprise the first winding of the comb part 2012 being wound on described first combed magnetic core 201, and is wound on second winding of comb part 2022 of described second combed magnetic core 202.First combed magnetic core 201 and the second combed magnetic core 202 interlock, and for the winding be wound on a magnetic post, what shade direction was identical is same winding.That is, in existing winding technique mode, two windings in a magnetic device shown in Fig. 1 b are ectonexine coiling, in contrast, the winding technique mode that the present invention proposes, two windings in a magnetic device are upper and lower coiling.
From the above, a kind of magnetic integrated components that the embodiment of the present invention provides has the following advantages: the comb part 2012 of the first combed magnetic core 201 of this magnetic integrated components and the comb part 2022 of the second combed magnetic core 202 are docked mutually, forms magnetic post 203; Wherein, magnetic post 203 described at least one is wound with winding 204, and the magnetic post 203 being wound with winding 204 offers air gap 205 between the comb part 2012 and the comb part 2022 of described second combed magnetic core 202 of described first combed magnetic core 201, existing magnetic device is carried out integrated, reduces to take volume; Further, because the loss of magnetic core and volume are directly proportional, therefore magnetic integrated components of the present invention is relative to existing magnetic device configurations, and the loss of magnetic core can reduce greatly.
Preferably, in some embodiments of the invention, magnetic integrated components as shown in Figure 2 b, described first winding and described second winding are combined by skeleton 206, and be wound on described magnetic post 203, wherein, described first winding is different with the coiling direction of described second winding.
Further preferably, in some embodiments of the invention, if when the number offering the magnetic post of air gap 205 is even number, then in described magnetic post, air gap do not opened by middle magnetic post, another generalized section of the magnetic integrated components that can provide for the embodiment of the present invention with reference to figure 3a, Fig. 3 a in the lump; If when the number offering the magnetic post of air gap is odd number, then in described magnetic post, the magnetic post of the right and left does not open air gap, wherein, the magnetic post not being full of winding 204 is positioned at the axisymmetric position of magnetic integrated components, namely the path of magnetic post as multiple magnetic flux of air gap is not opened, another generalized section of the magnetic integrated components that can provide for the embodiment of the present invention with reference to figure 3b, Fig. 3 b in the lump;
Based on two kinds of facilities, described first combed magnetic core 201 and described second combed magnetic core 202 make-up, the magnetic post part being full of winding 204 offers air gap 205, is not full of the inseparable air gap 205 in magnetic post portion of winding 204.Be understandable that, as Fig. 3 a and Fig. 3 b, for convenience of understanding, winding 204 does not mark;
Technical scheme for a better understanding of the present invention, is briefly described for magnetic integrated components as shown in Figure 2 b below:
As shown in Figure 2 b, in this embodiment, if be full of the magnetic post of winding 204 for two, the right and left two the magnetic posts 203 being full of winding 204 offer air gap 205, middle magnetic post does not open air gap; Wherein, described first winding can comprise winding 204a and winding 204c, and described second winding can comprise winding 204b and winding 204d; Be understandable that, described winding 204a and winding 204b can think composition magnetic device (as transformer 1), described winding 204a and winding 204b can think former vice-side winding respectively, in a magnetic device transformer 1, two windings (winding 204a and winding 204b) are upper and lower coiling; Described winding 204c and winding 204d also can think a magnetic device (as transformer 2), described winding 204c and winding 204d can think former vice-side winding respectively, in another magnetic device transformer 2, two windings (winding 204c and winding 204d) are also upper and lower coiling.That is, in embodiments of the present invention, the magnetic post (namely offering the magnetic post of air gap) being full of winding can be equivalent to transformer, and integrated morphology is as shown in Figure 2 b integrated with two transformers.
Further, in described magnetic post 203, for the magnetic post not being wound with winding, between the comb part 2012 and the comb part 2022 of described second combed magnetic core 202 of described first combed magnetic core 201, do not open air gap, to form common magnetic circuit.Wherein, if the magnetic flux of transformer 1 and transformer 2 equal (i.e. Φ a=Φ b), so common magnetic circuit part, namely the magnetic flux of magnetic post is 0 in the middle of integrated morphology, can flow direction according to Fig. 2 b, middle common magnetic circuit part, magnetic flux is cancelled out each other, and therefore, the magnetic flux of magnetic post is 0.Because the loss of magnetic core and volume are directly proportional, be directly proportional with 2 ~ 3 powers of flux change amount, therefore magnetic integrated components of the present invention is relative to magnetic device configurations as shown in Figure 1 b, and core volume reduces, and the magnetic flux of middle magnetic post is 0, so the loss of magnetic core can reduce greatly.In addition, it should be noted that, as shown in Figure 2 b, the leakage inductance sum of described transformer 1 and described transformer 2 can be designed as the sensibility reciprocal of resonant inductance Lr, integrated further, saves the space that original inductance L r takies, device volume is reduced further.
Below based in magnetic integrated components, integrated odd number transformer and even number transformer both of these case, each act object lesson is described its operation principle:
Normally, the calculating of magnetic circuit is changed into circuit model to calculate, the magnetic flux Φ in the corresponding magnetic circuit of the electric current in circuit, the resistance in circuit is corresponding with the magnetic resistance in magnetic circuit, and the computing formula of magnetic resistance is:
Wherein, le represents the length of magnetic path, and u0 represents permeability of vacuum, and u0=4* π * 10-7H/m, ur are that magnetic permeability represents the sectional area of magnetic core divided by u0, Ae.
Calculating about magnetic circuit:
First aspect, based on the situation of integrated three transformers of magnetic integrated components, can in the lump with reference to figure 4a and Fig. 4 b, wherein, Fig. 4 a is the structural representation of magnetic integrated components in this embodiment, this integrated morphology comprises the first combed magnetic core 401, second combed magnetic core 402, the comb part of described first combed magnetic core 401 and the comb teeth part of described second combed magnetic core 402 divide and are oppositely arranged, form 5 magnetic posts 403, the magnetic post of the right and left does not offer air gap, all the other 3 magnetic posts offer air gap 404, and are full of winding (in figure, winding does not mark); Fig. 4 b is the equivalent-circuit model signal of described integrated morphology, and in Fig. 4 b, Φ 1 ~ Φ 3 is equivalent to current source.RL1 ~ RL4 corresponds respectively to the magnetic resistance of L1 ~ L4 section magnetic core, and Rleft corresponds to the magnetic resistance not offering the magnetic post of air gap on the left side, and Rright corresponds to the magnetic resistance not offering the magnetic post of air gap on the right.
Suppose: RL1=RL2=RL3=RL4=RL, Rright=Rleft=2RL, Φ 1=Φ 2=Φ 3=Φ and direction are as shown in Figure 4 b.Can be in the equivalent-circuit model of described magnetic integrated components with reference to figure 4c to Fig. 4 d, Fig. 4 c to Fig. 4 d in the lump, the principle of stacking schematic diagram of magnetic flux, the magnetic flux that can calculate each section of magnetic core according to principle of stacking is as follows:
The magnetic flux of Rleft, RL1 is: Φ 1*2/3-Φ 3*1/3-Φ 2*1/2=-Φ * 1/6(flow direction counterclockwise);
The magnetic flux of Rright, RL4 is: Φ 1*1/3-Φ 3*2/3-Φ 2*1/2=-Φ * 5/6(flow direction clockwise direction);
The magnetic flux of RL2 is: Φ 1*1/3+ Φ 3*1/3+ Φ 2*1/2=Φ * 7/6(flow direction left);
The magnetic flux of RL3 is: Φ 1*1/3+ Φ 3*1/3-Φ 2*1/2=Φ * 1/6(flow direction left).
Second aspect, based on the situation of integrated four transformers of magnetic integrated components, can in the lump with reference to figure 5a and Fig. 5 b, wherein, Fig. 5 a is the structural representation of magnetic integrated components in this embodiment, this integrated morphology comprises the first combed magnetic core 501, second combed magnetic core 502, the comb part of described first combed magnetic core 501 and the comb teeth part of described second combed magnetic core 502 divide and are oppositely arranged, form 5 magnetic posts 503, middle magnetic post does not offer air gap, all the other 4 magnetic posts offer air gap 504, and are full of winding (in figure, winding does not mark); Fig. 5 b is the equivalent-circuit model signal of described integrated morphology, and in Fig. 5 b, Φ 1 ~ Φ 4 is equivalent to current source.RL1 ~ RL4 corresponds respectively to the magnetic resistance of L1 ~ L4 section magnetic core, and RL_mid corresponds to the magnetic resistance of the magnetic post not offering air gap.
Suppose: RL1=RL2=RL3=RL4=RL, RL_mid=2RL, Φ 1=Φ 2=Φ 3=Φ 4=Φ and direction as shown in Figure 5 a, utilize principle of stacking to calculate the magnetic flux of each section of magnetic core: the magnetic flux of RL1 and RL4 is Φ; The magnetic flux of RL2, RL3 and RL_mid is 0.Wherein, in this execution mode, the principle of stacking shown in principle of stacking and Fig. 4 c to Fig. 4 d is similar, no longer specifically sets forth herein.
From above-mentioned calculating, the magnetic integrated components that the embodiment of the present invention provides is more suitable for the integrated of even number transformer, and when even number transformer is integrated, the counteracting of the magnetic flux of RL2, RL3 and RL_mid can be better.
From the above, a kind of magnetic integrated components that the embodiment of the present invention provides, the comb part of the first combed magnetic core and the comb teeth part of the second combed magnetic core divide and are oppositely arranged, and form magnetic post; Wherein, magnetic post described at least one is wound with winding, and the magnetic post being wound with winding offers air gap between described first combed magnetic core comb part and described second combed magnetic core comb teeth part are divided; Because the loss of magnetic core and volume are directly proportional, be directly proportional with 2 ~ 3 powers of flux change amount, therefore magnetic integrated components of the present invention is relative to existing magnetic device configurations, and core volume reduces, and the magnetic flux of common magnetic circuit can be 0, so the loss of magnetic core can reduce greatly.Further, the leakage inductance sum of magnetic integrated components can be designed as the sensibility reciprocal of original resonant inductance Lr, integrated further, saves the space that inductance L r takies, device volume is reduced further.
For ease of better implementing the magnetic integrated components that the embodiment of the present invention provides, the embodiment of the present invention also provides a kind of device based on above-mentioned magnetic integrated components.Wherein the implication of noun is identical with above-mentioned magnetic integrated components, and specific implementation details can with reference to the explanation in magnetic integrated components embodiment.
Please refer to Fig. 6, the structural representation of a kind of power module 600 that Fig. 6 provides for the embodiment of the present invention, wherein, described power module 600 comprises magnetic device 601, and wherein, described magnetic device 601 adopts magnetic integrated components; Be understandable that, described power module 600 can be primary power source high power module, built-in described magnetic integrated components in described primary power source high power module;
In some embodiments of the invention, described power module 600 DC source 601, current conversion element 602, magnetic integrated components 603 and rectification circuit 604; Wherein, described magnetic integrated components 603 is between described current conversion element and described rectification circuit;
In this embodiment, described magnetic integrated components 603 with reference to shown in figure 2a, can be able to comprise:
First combed magnetic core 201, second combed magnetic core 202, the comb part that wherein said first combed magnetic core 201 and described second combed magnetic core 202 include body part and extend out from body part;
The body part 2011 of described first combed magnetic core 201 is separated setting with the body part 2021 of described second combed magnetic core 202, the comb part 2012 of described first combed magnetic core 201 and the comb part 2022 of described second combed magnetic core 202 are docked mutually, form magnetic post 203;
Wherein, magnetic post 203 described at least one is wound with winding 204, and the magnetic post being wound with winding 204 offers air gap 205 between described first combed magnetic core 201 comb part and described second combed magnetic core 202 comb teeth part are divided.
Wherein, shown air gap 205 can reduce magnetic permeability.
Preferably, in some embodiments of the invention, can in the lump with reference to figure 2b, another schematic diagram of the magnetic integrated components that Fig. 2 b provides for the embodiment of the present invention, wherein, one is wound with to the magnetic post of winding, described winding 204 can comprise the first winding of the comb part 2012 being wound on described first combed magnetic core 201, and be wound on second winding of comb part 2022 of described second combed magnetic core 202, relative to the winding method that two windings in an existing magnetic device are ectonexine coiling, two windings in the present invention in a magnetic device are upper and lower coiling.Wherein, described first winding and described second winding are combined by skeleton 206, and are wound on described magnetic post 203, and wherein, described first winding is different with the coiling direction of described second winding.
Further preferably, in some embodiments of the invention, if when the number offering the magnetic post of air gap is even number, then in described magnetic post, middle magnetic post is set to not open air gap, another schematic diagram of the magnetic integrated components that can provide for the embodiment of the present invention with reference to figure 3a, Fig. 3 a in the lump; If when the number offering the magnetic post of air gap is odd number, then in described magnetic post, the most left and the rightest magnetic post is set to not open air gap, wherein, the magnetic post not being full of winding 204 is positioned at the axisymmetric position of integrated component, namely the path of magnetic post as multiple magnetic flux of air gap is not opened, another schematic diagram of the magnetic integrated components that can provide for the embodiment of the present invention with reference to figure 3b, Fig. 3 b in the lump;
Based on two kinds of facilities, described first combed magnetic core 201 and described second combed magnetic core 202 make-up, the magnetic post part being full of winding 204 offers air gap 205, is not full of the inseparable air gap 205 in magnetic post portion of winding 204.Be understandable that, as Fig. 3 a and Fig. 3 b, for convenience of understanding, winding 204 does not mark;
Technical scheme for a better understanding of the present invention, is briefly described for magnetic integrated components as shown in Figure 2 b below:
As shown in Figure 2 b, in this embodiment, if be full of the magnetic post of winding 204 for two, the right and left two the magnetic posts 203 being full of winding 204 offer air gap 205, middle magnetic post does not open air gap; Wherein, described first winding can comprise winding 204a and winding 204c, and described second winding can comprise winding 204b and winding 204d; Be understandable that, described winding 204a and winding 204b can think composition magnetic device (as transformer 1), described winding 204a and winding 204b can think former vice-side winding respectively, in a magnetic device transformer 1, two windings (winding 204a and winding 204b) are upper and lower coiling; Described winding 204c and winding 204d also can think a magnetic device (as transformer 2), described winding 204c and winding 204d can think former vice-side winding respectively, in another magnetic device transformer 2, two windings (winding 204c and winding 204d) are also upper and lower coiling.That is, in embodiments of the present invention, the magnetic post (namely offering the magnetic post of air gap) being full of winding can be equivalent to transformer, and integrated morphology is as shown in Figure 2 b integrated with two transformers.
Further, in described magnetic post 203, for the magnetic post not being wound with winding, between described first combed magnetic core 201 comb part and described second combed magnetic core 202 comb teeth part are divided, do not open air gap, to form common magnetic circuit.Wherein, if the magnetic flux of transformer 1 and transformer 2 equal (i.e. Φ a=Φ b), so common magnetic circuit part, namely the magnetic flux of magnetic post is 0 in the middle of integrated morphology, can flow direction according to Fig. 2 b, middle common magnetic circuit part, magnetic flux is cancelled out each other, and therefore, the magnetic flux of magnetic post is 0.Because the loss of magnetic core and volume are directly proportional, be directly proportional with 2 ~ 3 powers of flux change amount, therefore magnetic integrated components of the present invention is relative to magnetic device configurations as shown in Figure 1 b, and core volume reduces, and the magnetic flux of middle magnetic post is 0, so the loss of magnetic core can reduce greatly.In addition, it should be noted that, as shown in Figure 2 b, the leakage inductance sum of described transformer 1 and described transformer 2 can be designed as the sensibility reciprocal of resonant inductance Lr, integrated further, saves the space that original inductance L r takies, device volume is reduced further.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
The magnetic integrated components provided the embodiment of the present invention above and power module are described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to sum up, this description should not be construed as limitation of the present invention.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described describing the required accompanying drawing used to embodiment below, 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 prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 a is the structural representation of a kind of LLC series resonant circuit in prior art;
Fig. 1 b is the cross-sectional schematic of magnetic device in prior art LLC series resonant circuit;
The schematic diagram of a kind of magnetic integrated components that Fig. 2 a provides for the embodiment of the present invention;
Another schematic diagram of the magnetic integrated components that Fig. 2 b provides for the embodiment of the present invention;
Another schematic diagram of the magnetic integrated components that Fig. 3 a provides for the embodiment of the present invention;
Another schematic diagram of the magnetic integrated components that Fig. 3 b provides for the embodiment of the present invention;
Another schematic diagram of the magnetic integrated components that Fig. 4 a provides for the embodiment of the present invention;
A kind of equivalent-circuit model schematic diagram of the magnetic integrated components that Fig. 4 b provides for the embodiment of the present invention;
Fig. 4 c is a kind of magnetic flux principle of stacking schematic diagram in embodiment of the present invention electrical equivalent model;
Fig. 4 d is another magnetic flux principle of stacking schematic diagram in embodiment of the present invention electrical equivalent model;
Fig. 4 e is another magnetic flux principle of stacking schematic diagram in embodiment of the present invention electrical equivalent model;
Another schematic diagram of the magnetic integrated components that Fig. 5 a provides for the embodiment of the present invention;
Another equivalent-circuit model schematic diagram of the magnetic integrated components that Fig. 5 b provides for the embodiment of the present invention;
The structural representation of a kind of power module that Fig. 6 provides for the embodiment of the present invention.
Embodiment
Embodiments providing a kind of magnetic integrated components and power module, taking for solving multiple magnetic device the problem that volume is large and core loss is large.
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the embodiments described below are only the present invention's part embodiments, and the embodiment of not all.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Claims (10)
1. a magnetic integrated components, is characterized in that, comprising:
First combed magnetic core, the second combed magnetic core, the comb part that wherein said first combed magnetic core and described second combed magnetic core include body part and extend out from body part;
The body part of described first combed magnetic core is separated setting with the body part of described second combed magnetic core, and the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core divide mutual docking, forms magnetic post;
Wherein, magnetic post described at least one is wound with winding, and the magnetic post being wound with winding offers air gap between the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core are divided;
One is wound with to the magnetic post of winding, described winding comprises the first winding of the comb part being wound on described first combed magnetic core, and is wound on second winding of comb part of described second combed magnetic core.
2. magnetic integrated components according to claim 1, is characterized in that,
Described first winding and described second winding are combined by skeleton, are wound on described magnetic post, and wherein, described first winding is different with the coiling direction of described second winding.
3. magnetic integrated components according to claim 1, is characterized in that,
For the magnetic post not being wound with winding, between described first combed magnetic core comb part and described second combed magnetic core comb teeth part are divided, do not open air gap, to form common magnetic circuit.
4. the magnetic integrated components according to any one of claims 1 to 3, is characterized in that,
If when the number offering the magnetic post of air gap is even number, then in described magnetic post, middle magnetic post is set to not open air gap;
If when the number offering the magnetic post of air gap is odd number, then in described magnetic post, the most left and the rightest magnetic post is set to not open air gap.
5. magnetic integrated components according to claim 4, is characterized in that,
When the number of the magnetic post offering air gap is two, then the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core divide and are oppositely arranged, and form three magnetic posts;
Wherein, middle magnetic post is not open that air gap is arranged, and both sides magnetic post respectively offers air gap, and this magnetic post offering air gap is wound with winding.
6. a power module, is characterized in that, comprising:
DC source, current conversion element, magnetic integrated components and rectification circuit; Wherein, described magnetic integrated components is between described current conversion element and described rectification circuit;
Described magnetic integrated components comprises the first combed magnetic core, the second combed magnetic core, the comb part that wherein said first combed magnetic core and described second combed magnetic core include body part and extend out from body part;
The body part of described first combed magnetic core is separated setting with the body part of described second combed magnetic core, and the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core divide mutual docking, forms magnetic post;
Wherein, magnetic post described at least one is wound with winding, and the magnetic post being wound with winding offers air gap between the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core are divided;
One is wound with to the magnetic post of winding, described winding comprises the first winding of the comb part being wound on described first combed magnetic core, and is wound on second winding of comb part of described second combed magnetic core.
7. power module according to claim 6, is characterized in that,
Described first winding and described second winding are combined by skeleton, are wound on described magnetic post, and wherein, described first winding is different with the coiling direction of described second winding.
8. power module according to claim 6, is characterized in that,
For the magnetic post not being wound with winding, between described first combed magnetic core comb part and described second combed magnetic core comb teeth part are divided, do not open air gap, to form common magnetic circuit.
9. the power module according to any one of claim 6 to 8, is characterized in that,
If when the number offering the magnetic post of air gap is even number, then in described magnetic post, middle magnetic post is set to not open air gap;
If when the number offering the magnetic post of air gap is odd number, then in described magnetic post, the most left and the rightest magnetic post is set to not open air gap.
10. power module according to claim 9, is characterized in that,
When the number of the magnetic post offering air gap is two, then the comb part of described first combed magnetic core and the comb teeth part of described second combed magnetic core divide and are oppositely arranged, and form three magnetic posts;
Wherein, middle magnetic post is not open that air gap is arranged, and both sides magnetic post respectively offers air gap, and this magnetic post offering air gap is wound with winding.
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| CN108880280A (en) * | 2017-05-08 | 2018-11-23 | 泰达电子股份有限公司 | Integrated magnet assembly and power converter |
| CN110326207A (en) * | 2016-11-11 | 2019-10-11 | 德州仪器公司 | LLC resonance converter with integrated magnetic element |
| CN111883351A (en) * | 2020-07-23 | 2020-11-03 | 天津大学 | Magnetic core structure based on multi-resonance converter |
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