CN105810406B - A kind of power magnetic cell and power module - Google Patents
A kind of power magnetic cell and power module Download PDFInfo
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- CN105810406B CN105810406B CN201610270329.9A CN201610270329A CN105810406B CN 105810406 B CN105810406 B CN 105810406B CN 201610270329 A CN201610270329 A CN 201610270329A CN 105810406 B CN105810406 B CN 105810406B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The present invention relates to the technical field of electric product, a kind of power magnetic cell and power module are disclosed.The power magnetic cell includes the first magnetic core and the second magnetic core, wherein, first magnetic core includes the first magnetic core portion and the second magnetic core portion arranged side by side, wherein, the second protrusion higher than first protrusion in the second magnetic core portion and positioned at the first raised both sides is provided in first magnetic core portion, it is respectively provided with the first gap between first protrusion and two the second protrusions, the second magnetic core is covered in the second magnetic core portion, and has the second gap being connected to the first gap between the second magnetic core and the first protrusion.In the above-mentioned technical solutions, the second gap decouples air gap as magnetic, and second gap makes winding and air gap avoid completely using open air gap.The eddy-current loss that air gap leakage field cutting winding strap is come is reduced, while developing air gap to help to reduce the control difficulty of resonance sensibility reciprocal precision.
Description
Technical field
The present invention relates to the technical field of electric product more particularly to a kind of power magnetic cells and power module.
Background technology
With the continuous dilatation of equipment, unit capacity equipment size constantly reduces, and the free space of veneer power supply module is more next
Smaller, the power density of push module power supply is continuously improved, from several kilowatts/inch^3 of a few hectowatt/inch^3 till now, power supply
Module mainly protects four by former secondary-side switch device and mating radiating piece, power magnetic cell, control detector part, input filter
It is grouped as.Input filter protection belongs to device for no reason at all, and is mostly standard configuration, and drop volume possibility is small and of high cost, control inspection
It surveys device and belongs to capacitance resistance ware, be not the bottleneck place that power density is promoted.Former secondary-side switch device size and heat-sinking capability according to
Rely the rhythm matching of the development and product power density evolution in base semiconductor technique and material technology not on；Power magnetic member
Part accounts for 30% or so of entire module volume, by the design of power magnetic cell, reduces the overall volume of power magnetic cell, improves
The power density of power module is current main break through direction.
In order to reduce former secondary-side switch pipe switching loss, Switching Power Supply all uses resonance topological substantially at present, and such as Fig. 1 institutes
The LLC series resonant topologies shown are the most universal.Cr is resonant capacitance, Lr is resonant inductance, and Lm is magnetizing inductance；For this side
The current industry of case reduces the volume of power magnetic cell, and the power density for improving power magnetic cell mainly has 3 directions：1, power magnetic
Element integrates, and by the way that resonant inductance Lr and transformer Lm are integrated into a power magnetic cell, it is overall to reduce power magnetic cell
Product；2, the working frequency of power magnetic cell is improved, the volume of power magnetic cell is reduced；3, power magnetic cell working frequency is being improved
While, the integrated of power magnetic cell is carried out, power magnetic cell volume is further decreased.
A kind of currently used technical solution：Lr and Lm is integrated, as shown in Figures 2 and 3, wherein x indicates power magnetic cell
Length direction, y illustrates that the width direction of power magnetic cell, z illustrate the short transverse of power magnetic cell.Power magnetic cell
It being formed by two magnetic cores, 1,2 pair of box, and there is air gap 5 between magnetic core 1 and magnetic core 2, primary side winding 3 surrounds protrusion 6 and protrusion 7,
Vice-side winding 4 is around protrusion 7；Protrusion 6 is resonant inductance magnetic core effective sectional area, and protrusion 7 is the magnetic core effective cross-section of transformer
Product；Resonant inductance Lr and transformer T form resonance topological power magnetic cell；
As shown in Figures 2 and 4, the air gap 5 of power magnetic cell in the prior art is arranged between two magnetic cores 1,2, and
Resonant inductance Lr is mainly determined by air gap 5, since resonant inductance air gap 5 exists, as shown in figure 4, air gap leakage field cuts winding copper
Skin causes the eddy-current loss of power magnetic cell bigger.
Invention content
The present invention provides a kind of power magnetic cell and power modules, to improve the conversion of power module power magnetic cell
Efficiency reduces vortex consume.
In order to solve the above-mentioned technical problem, an embodiment of the present invention provides a kind of power magnetic cell, the power magnetic cell packets
Include the first magnetic core including being oppositely arranged and the second magnetic core and primary side winding and vice-side winding, the primary side winding and described
Vice-side winding respectively includes the rectangle frame copper sheet of multiple stackings,
First magnetic core includes the first magnetic core portion and the second magnetic core portion, wherein the upper surface in first magnetic core portion is set
It is equipped with the first protrusion and is located at the second protrusion of the described first raised both sides, first protrusion and two the second protrusions
Between there is the first gap of rectangle frame copper sheet for accommodating the primary side winding, and first protrusion and the second protrusion is upper
Surface is higher than the upper surface in second magnetic core portion, and the upper table in second magnetic core portion offers two for accommodating institute downwards
The groove of the rectangle frame copper sheet of primary side winding and vice-side winding is stated, there is third protrusion between described two grooves；
The rectangle frame copper sheet of the vice-side winding is located in described two grooves and is sleeved on the third protrusion, the original
The rectangle frame copper sheet of side winding is located in described two grooves and first gap and is sleeved on first protrusion and third
In protrusion；
Second magnetic core is covered in described two grooves and the third protrusion in second magnetic core portion, and described
There is the second gap between second magnetic core and first protrusion.
In the above-mentioned technical solutions, the second gap decouples air gap as magnetic, and second gap is using open air gap, make around
Group and air gap are avoided completely, and eddy-current loss caused by leakage field substantially reduces, and are improved the transfer efficiency of power magnetic cell, are developed simultaneously
Air gap helps to reduce the control difficulty of resonance sensibility reciprocal precision.
At specifically the second gap of setting, the inductance value of the resonant inductance increase with the width in second gap and
Reduce.Specifically, the width in second gap and the inductance value of the resonant inductance are inversely proportional and specifically include, between described second
The width of gap is：
Wherein, Lr resonant inductances sensibility reciprocal；Nr resonant inductance the number of turns；μrMagnetic core is opposite
Magnetic conductivity；μ0Vacuum relative permeability；le1Magnetic core equivalent magnetic circuit length；Ae11Magnetic core equivalent magnetic circuit sectional area；lgapBetween second
The width of gap；Ae22Effective air gap sectional area.
In a specific plan of establishment, the first magnetic core portion and the second magnetic core portion of the first magnetic core may be used fission and set
Setting can also use integral structure to be arranged, and in a preferred scheme, the first magnetic core portion and the second magnetic core portion are structure as a whole,
And there is the gap for accommodating the vice-side winding coil, second magnetic core court between first protrusion and the third protrusion
End face to first protrusion is plane.The first magnetic core portion and the second magnetic core portion is used to be structure as a whole, facilitated entire
The installation and setting of power module.And when using the above structure, the second gap is raised towards first by the second magnetic core
Plane convexed to form with first, i.e., the gap be cuboid gap.
In addition, be structure as a whole in the first magnetic core portion and second magnetic core portion, and first protrusion and the third
When having the gap for accommodating the vice-side winding between protrusion, the second gap can also be formed by another structure, the structure
For the gap structure on the second magnetic core, at this point, second magnetic core is pressed in first protrusion and the second protrusion, and it is described
One end setting of second magnetic core towards first protrusion is jagged, and the notch is connected to first gap.Using scarce
Mouthful form when, the total length of the second magnetic core is compared and the overall length that uses second magnetic core of second gap for cuboid gap when
Degree increases the width in the second gap, to improve the power density of entire power magnetic cell.
When using nicked form, different shapes may be used in the shape of notch, in some specific set-up modes,
The notch can be that dove-tail form notch, arc notch or V-notch or other on-plane surfaces cut the notch to be formed.
When cutting the notch to be formed using on-plane surface, the position relationship of the notch and the second magnetic core is：The notch
Center line is conllinear with the center line of the second magnetic cell.To facilitate the assembly of whole part, ensure the connection between three gaps.
More, when notch is arranged, second magnetic cell towards it is described first protrusion end face in, be located at it is described lack
The end face of mouth both sides is aligned with described two second protrusions respectively.To facilitate the assembly of the second magnetic core.
In a more specific embodiment, the top end surface of second magnetic cell and first protrusion and two the
The top end surface of two protrusions flushes.
In addition, the present invention also provides a kind of power module, which includes：Input filter protection module and institute
The primary side switch pipe for stating the connection of input filter protection module, the power magnetic cell being connect with the primary side switch pipe and the work(
The secondary side rectification filtering module that rate magnetic cell can connect, wherein the power magnetic cell is power magnetic described in any one of the above embodiments member
Part.
In the above-mentioned technical solutions, the second gap in power magnetic cell decouples air gap as magnetic, and second gap is adopted
With open air gap, winding and air gap is made to avoid completely, eddy-current loss caused by leakage field substantially reduces, and improves turning for power magnetic cell
Efficiency is changed, while developing air gap to help to reduce the control difficulty of resonance sensibility reciprocal precision.
Description of the drawings
Fig. 1 is the schematic diagram of power magnetic cell in the prior art；
Fig. 2 is the structural schematic diagram of power magnetic cell in the prior art；
Fig. 3 is the decomposition diagram of power magnetic cell in the prior art；
Schematic diagram when Fig. 4 is power magnetic cell leakage field in the prior art；
Fig. 5 is the structural schematic diagram for the power magnetic cell that the embodiment of the present invention one provides；
Fig. 6 is the magnetic flux leakage theory figure of power magnetic cell provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of power magnetic cell provided by Embodiment 2 of the present invention；
Fig. 8 is the structural schematic diagram of the first magnetic core of power magnetic cell provided by Embodiment 2 of the present invention；
Fig. 9 is the structural schematic diagram for the power magnetic cell that the embodiment of the present invention three provides；
Figure 10 is the decomposition diagram for the power magnetic cell that the embodiment of the present invention three provides.
Reference numeral：
1,2- magnetic cores 3- primary side windings 4- vice-side windings
5- air gap 6- protrusions 7- protrusions
10- the first magnetic core the second magnetic cores of 11- portion
111- groove 112- third protrusions the first magnetic cores of 12- portion
121- the first protrusion 122- the second protrusion the second magnetic cores of 20-
The first gaps 21- notch 30- primary side windings 40-
The second gaps 50- 60- vice-side windings
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
In order to solve the above-mentioned technical problem, an embodiment of the present invention provides a kind of power magnetic cell, the power magnetic cell packets
Include the first magnetic core being oppositely arranged and the second magnetic core and primary side winding and vice-side winding, primary side winding and vice-side winding difference
Rectangle frame copper sheet with multiple stackings；
First magnetic core includes the first magnetic core portion and the second magnetic core portion, wherein the upper surface in the first magnetic core portion is provided with first
Protrusion and the second protrusion for being located at the first raised both sides, have between the first protrusion and two the second protrusions for accommodating original
First gap of the rectangle frame copper sheet of side winding, and the upper surface of the first protrusion and the second protrusion is higher than the upper table in the second magnetic core portion
The upper table in face, the second magnetic core portion offers the recessed of two rectangle frame copper sheets for accommodating primary side winding and vice-side winding downwards
Slot has third protrusion between two grooves；
The rectangle frame copper sheet of vice-side winding is located in two grooves and is sleeved on third protrusion, the rectangle frame copper of primary side winding
Piece is located in two grooves and the first gap and is sleeved in the first protrusion and third protrusion；
Second magnetic core is covered on two grooves and third protrusion in the second magnetic core portion, and the second magnetic core and the first protrusion
Between have the second gap.
In the above-described embodiments, the second gap decouples air gap as magnetic, when second gap is specifically arranged, using opening
Air gap makes winding and air gap avoid completely, and eddy-current loss caused by leakage field substantially reduces, and improves the conversion effect of power magnetic cell
Rate, at the same develop air gap contribute to reduce resonance sensibility reciprocal precision control difficulty.
In order to facilitate the structure and principle of power magnetic cell provided in this embodiment is understood, with reference to specific embodiment
It is described in detail.
It is preferred it should be noted that understand power magnetic cell provided in this embodiment for convenience, attached drawing in the present embodiment
In establish coordinate system, wherein x indicates the length direction of power magnetic cell, and y illustrates the width direction of power magnetic cell, z tables
The short transverse of power magnetic cell is shown.
As shown in Fig. 5, Fig. 8 and Figure 10, Fig. 5, Fig. 7 and Figure 10 show the power magnetic cell of different structure.In this implementation
In example, power magnetic cell includes the first magnetic core 10, the second magnetic core 20, primary side winding 30 and vice-side winding 60, wherein the first magnetic core
10 and second magnetic core 20 be oppositely arranged and formed the space for accommodating primary side winding 30 and vice-side winding 60, in addition, in the present embodiment,
Primary side winding 30 in the set-up mode of primary side winding 30 and vice-side winding 60 and power magnetic cell in the prior art and secondary side
The set-up mode of winding 60 is identical, therefore, no longer detailed herein to repeat.
As shown in fig. 7, Fig. 7 shows a kind of structure of first magnetic core.The whole knot of the first magnetic core 10 in the present embodiment
Structure is a L-shaped structure, and the vertical portion and horizontal component of the L-shaped structure are respectively the first magnetic core portion 12 and the second magnetic core
20, wherein it is respectively convex positioned at intermediate first to have spaced three protrusions, three protrusions in the first magnetic core portion 12
121 are played, and is arranged on two the second protrusions 122 of the first raised 121 both sides, and in setting, the first protrusion 121 and two
The first gap 40 is separated between second protrusion 122, this two the first gaps 40 are to be set in for accommodating primary side winding 30
Avoiding space when in one protrusion 121.It is again provided in second magnetic core portion 11 for accommodating primary side winding 30 and vice-side winding
60 groove 111, and there is third protrusion 112 between two grooves 111, the bottom surface of groove 111 is upper with the first magnetic core portion 12
Surface is generally aligned in the same plane, and is also had with the frame for accommodating vice-side winding 60 between the first protrusion 121 and third protrusion 112
Gap.
In the present embodiment, primary side winding 30 is cut in order to change leakage field caused by magnetic decouples air gap (i.e. the second gap 50)
The case where, power magnetic cell provided in this embodiment changes the installation position in the second gap 50, in the present embodiment, between second
Gap 50 is arranged between the first magnetic core portion 12 and the second magnetic core 20, specifically, and the second magnetic core 20 towards the end of the first protrusion 121
There is the second gap 50 being connected to two the first gaps 40 between face and the first protrusion 121.
That is the first gap 40 and the second gap 50 form a three-dimensional gap.Its leakage field situation as shown in fig. 6, join together
Examine Fig. 5 and Fig. 6, wherein Fig. 6 shows that the end surface shape in the first magnetic core portion 12 in Fig. 5, the end face are perpendicular to the first magnetic core
The end face of the orientation in portion 12 and the second magnetic core portion 11, as shown in fig. 6, laterally illustrating the width in the first magnetic core portion in Fig. 6
Direction y (perpendicular to the direction of the arrangement in the first magnetic core portion 12 and the second magnetic core portion 11), vertical direction z are the first protrusion 121
Short transverse, the i.e. short transverse in the first magnetic core portion 12.The straight line with the arrow that leakage field line uses indicates.In the present embodiment,
Leakage field line transmits between 12 inside of the first magnetic core portion and first protrusion 121 and the second protrusion 122 in the first magnetic core portion 12, from
And the case where improving leakage field cutting 30 copper sheet of primary side winding of generation, thereby reduce the vortex consume of entire power magnetic cell
The case where, improve the efficiency of power magnetic cell.
At specifically the second gap 50 of setting, the inductance value of the resonant inductance increases with the width in second gap 50
Reduce greatly.The inductance value of resonant inductance i.e. in power magnetic cell be equal to resonant inductance the number of turns square with other structures numerical value
Ratio come what is determined, the numerical value of the other structures data is：The opposite magnetic conductivity of magnetic core multiplies with magnetic core equivalent magnetic circuit length
Product again divided by the value of the sectional area of magnetic core equivalent magnetic circuit, with the width in the second gap of vacuum relative permeability sincerity 50 divided by wait
Imitate the sum between the value of cross-section of air gap product；Specifically, the relationship of the width in the second gap 50 and the inductance value of the resonant inductance
Specially：
Wherein, Lr resonant inductances sensibility reciprocal；Nr resonant inductance the number of turns；μrMagnetic core is opposite
Magnetic conductivity；μ0Vacuum relative permeability；le1Magnetic core equivalent magnetic circuit length；Ae11Magnetic core equivalent magnetic circuit sectional area；lgapBetween second
The width of gap 50；Ae22Effective air gap sectional area, the equivalent cross-section of air gap product are the total cross section after the sectional area of all air gaps is equivalent
Product can be obtained by emulation.Pass through the resonant inductance for the power magnetic cell that above-mentioned correspondence can design as needed
Inductance value calculate the width in the second gap 50, so as to effectively improve the power of power magnetic cell, reduce leakage field production
The consume of raw vortex.
In the present invention, the specific setting in the second gap 50 may be used different modes and be formed, with reference to specific
It is described in detail in embodiment.
In a specific plan of establishment, the first magnetic core portion 12 and the second magnetic core portion 11 of the first magnetic core 10 may be used
Split settings can also use integral structure to be arranged.
As shown in figure 5, the first magnetic core portion 12 and the second magnetic core portion 11 are split joint, at this point, the electricity of power magnetic cell
Sense and transformer are separately arranged, i.e. the first magnetic core portion 12 forms resonant inductance with the primary side winding 30 of suit on it；Second
Second magnetic core portion 11 of magnetic core 20 and the first magnetic core 10 forms transformer to the vice-side winding 60 of box and suit therebetween.
Placement gap of second gap 50 between resonant inductance and transformer at this time.
But when using the structure of power magnetic cell as shown in Figure 5, due to using split structure, inevitably go out
The case where existing assembly precision bad control.For this purpose, a kind of more preferably power magnetic cell provided by the embodiment.Specifically, such as Fig. 7 and
Shown in Fig. 8, the first magnetic core portion 12 and the second magnetic core portion 11 of the first magnetic core 10 use integral structure, as shown in figure 8, the first magnetic core
Portion 12 and the second magnetic core portion 11 form a L-shaped structure, and have between the first protrusion 121 and third protrusion 112 and accommodate pair
The gap of 60 coil of side winding, the second magnetic core 20 towards the end face of the first protrusion 121 be plane.When using the above structure, the
Two gaps 50 are the interval between the projection portion and the end face of the second magnetic core 20 in the first magnetic core portion 12, at this point, second gap
50 be the gap of a cuboid.It reduces leakage field since resonant inductance is using open air gap with reference to figure 6 together and cuts winding
The eddy-current loss that copper sheet is brought.The first magnetic core portion 12 and the second magnetic core portion 11 is used to be structure as a whole, facilitates entire power
The installation and setting of module.And when using the above structure, due to the first magnetic core portion 12 of the first magnetic core 10 and the second magnetic
Core 11 is arranged using integral structure, facilitates the setting of entire power magnetic cell.
When the first magnetic core portion 12 and the second magnetic core portion 11 are arranged using integral structure, in power magnetic cell shown in Fig. 7,
Due between resonant inductance and transformer for magnetic decouple and increased isolation spacing, cause power magnetic cell account for plate suqare increase,
Meanwhile the power density of power magnetic cell reduces.In order to further improve the power of power magnetic cell, the embodiment of the present invention carries
Another power magnetic cell is supplied, in the power magnetic cell.As shown in Figure 9 and Figure 10, the first magnetic core portion 12 and the second magnetic core
Portion 11 uses integral structure, but the second gap 50 be not by the gap between the first magnetic core portion 12 and the second magnetic core 20 make by
Notch 21 is set in the second magnetic core portion 11 and forms the second gap 50.
Specifically, as shown in figure 9, in the present embodiment, the first magnetic core portion 12 is structure as a whole with the second magnetic core portion 11, and
When having the gap for accommodating vice-side winding 60 between the first protrusion 121 and third protrusion 112, the second gap 50 passes through in the second magnetic
21 structure of notch on core 20 is formed, at this point, the second magnetic core 20 is pressed in the first protrusion 121 and the second protrusion 122, and second
Magnetic core 20 is arranged jagged 21 towards one end of the first protrusion 121, between the notch 21 and the first magnetic core portion 12 described in formation
Second gap 50, since the second gap 50 is connected to the first gap 40, the notch 21 on the second magnetic core 20 is also between first
Gap 40 is connected to.When in the above-described embodiments, due to the form using notch 21, the length and Fig. 7 of the second magnetic core 20 shown in Fig. 9
Shown in the second magnetic core 20 total length increase the power magnetic cell in a Fig. 7 the second gap 50 width, to carry
The high power density of entire power magnetic cell.So that the power magnetic cell with power reduces the space occupied area.
In specific assembly, the top of the top end surface of the second magnetic cell and the first protrusion 121 and two the second protrusions 122
End face.The apparent regularity of power magnetic cell is improved, and facilitates control assembly effect.
Different shapes may be used in specific setting in the notch 21, and the specific notch 21 is to be cut using on-plane surface
It cuts the notch 21 towards the end cut formation of the first protrusion 121, the notch 21 in the second magnetic core 20 and different shapes may be used
Shape, if the notch 21 can be that dove-tail form notch 21, arc notch 21, V-notch 21, waveform or other on-plane surfaces are cut
Cut the notch 21 to be formed.It can be applied in power magnetic cell provided in this embodiment.Only need the notch 21 in setting, shape
At the width in the second gap 50 meet the correspondence limited in above-described embodiment.
With continued reference to Fig. 9 and Figure 10, in order to facilitate the processing of notch 21, while ensureing the connection effect in three gaps after installation
Fruit.When cutting the notch 21 to be formed using on-plane surface, the position relationship of the notch 21 and the second magnetic core 20 is：In notch 21
Line is conllinear with the center line of the second magnetic cell.I.e. when using the above structure, which uses a centrosymmetric structure, from
And facilitate the assembly of whole part, ensure the connection between three gaps.Meanwhile when using the above structure, also facilitate notch 21
Processing.In a kind of more specific structure, when notch 21 is arranged, in the end face of the second magnetic cell the first protrusion 121 of direction,
End face positioned at 21 both sides of notch is aligned with two the second protrusions 122 respectively.To facilitate the assembly of the second magnetic core 20.And
So that the power magnetic cell formed reduces lofty corner, the assembly effect of entire power magnetic cell is improved.
In addition, the present invention also provides a kind of power module, which includes：Input filter protection module, with it is defeated
The primary side switch pipe for entering to filter protection module connection, the power magnetic cell being connect with primary side switch pipe can connect with power magnetic cell
Secondary side rectification filtering module, wherein power magnetic cell be any of the above-described power magnetic cell.
In the above-described embodiments, the second gap 50 in power magnetic cell decouples air gap, and second gap 50 as magnetic
Using open air gap, winding and air gap is made to avoid completely.The eddy-current loss that air gap leakage field cutting winding strap is come is reduced, is developed simultaneously
Air gap helps to reduce the control difficulty of resonance sensibility reciprocal precision.And then improve the working efficiency of entire power module.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of power magnetic cell, including the first magnetic core being oppositely arranged and the second magnetic core and primary side winding and vice-side winding,
The primary side winding and the vice-side winding respectively include the rectangle frame copper sheet of multiple stackings, which is characterized in that
First magnetic core includes the first magnetic core portion and the second magnetic core portion, wherein the upper surface in first magnetic core portion is provided with
First protrusion and the second protrusion for being located at the described first raised both sides, have between first protrusion and two the second protrusions
It is useful for accommodating the first gap of the rectangle frame copper sheet of the primary side winding, and the upper surface of first protrusion and the second protrusion
Higher than the upper surface in second magnetic core portion, the upper table in second magnetic core portion offers two for accommodating the original downwards
The groove of the rectangle frame copper sheet of side winding and vice-side winding has third protrusion between described two grooves；
The rectangle frame copper sheet of the vice-side winding is located in described two grooves and is sleeved on the third protrusion, the primary side around
The rectangle frame copper sheet of group is located in described two grooves and first gap and is sleeved on first protrusion and third protrusion
On；
Second magnetic core is covered in described two grooves and the third protrusion in second magnetic core portion, and described second
There is the second gap between magnetic core and first protrusion.
2. power magnetic cell as described in claim 1, which is characterized in that first magnetic core portion and be sleeved on first magnetic
Primary side winding in the first protrusion in core forms resonant inductance, the electricity of the width and the resonant inductance in second gap
Sensibility reciprocal is inversely proportional.
3. power magnetic cell as claimed in claim 2, which is characterized in that the width in second gap is：
Wherein, Lr resonant inductances sensibility reciprocal；Nr primary side winding the number of turns；μrMagnetic core relative magnetic permeability
Rate；μ0Vacuum relative permeability；le1Magnetic core equivalent magnetic circuit length；Ae11Magnetic core equivalent magnetic circuit sectional area；lgapFor the second gap
Width；Ae22Effective air gap sectional area.
4. such as claims 1 to 3 any one of them power magnetic cell, which is characterized in that first magnetic core portion and described the
Two magnetic core portions are structure as a whole, and have between first protrusion and the third protrusion and accommodate the vice-side winding coil
The end face in gap, second magnetic core towards first protrusion is plane.
5. such as claims 1 to 3 any one of them power magnetic cell, which is characterized in that first magnetic core portion and described the
Two magnetic core portions are structure as a whole, and between the receiving vice-side winding between first protrusion and the third protrusion
Gap, second magnetic core are pressed in two second protrusions, and second magnetic core towards it is described first protrusion one end
It is arranged jagged, the notch is connected to first gap.
6. power magnetic cell as claimed in claim 5, which is characterized in that the notch is dove-tail form notch, arc notch or V
V notch v.
7. power magnetic cell as claimed in claim 6, which is characterized in that in the center line of the notch and second magnetic core
Line is conllinear.
8. power magnetic cell as claimed in claim 7, which is characterized in that second magnetic core towards it is described first protrusion end
Face, the end face positioned at the notch both sides are aligned with described two second protrusions respectively.
9. power magnetic cell as claimed in claim 8, which is characterized in that the top end surface of second magnetic core and described first
The top end surface of protrusion and two second protrusions flushes.
10. a kind of power module, which is characterized in that including：Input filter protection module connects with the input filter protection module
The primary side switch pipe that connects, the power magnetic cell being connect with the primary side switch pipe, the secondary side being connect with the power magnetic cell are whole
Flow filter module, wherein the power magnetic cell is such as claim 1~9 any one of them power magnetic cell.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10643782B2 (en) | 2016-10-28 | 2020-05-05 | Delta Electronics (Shanghai) Co., Ltd. | Magnetic component and power module |
| CN108809079B (en) | 2017-05-05 | 2019-11-05 | 台达电子企业管理（上海）有限公司 | Power inverter, inductance element and inductance cut off control method |
| CN108878096B (en) | 2017-05-16 | 2021-08-06 | 台达电子企业管理（上海）有限公司 | Magnetic element |
| US11676756B2 (en) | 2019-01-07 | 2023-06-13 | Delta Electronics (Shanghai) Co., Ltd. | Coupled inductor and power supply module |
| CN110729903B (en) | 2019-09-11 | 2021-02-09 | 华为技术有限公司 | Magnetic device and bidirectional DC conversion circuit |
| CN112821722B (en) | 2019-10-31 | 2022-07-19 | 台达电子企业管理（上海）有限公司 | Power conversion system |
| CN112751473B (en) | 2019-10-31 | 2021-11-05 | 台达电子企业管理（上海）有限公司 | Power module |
| CN112750607A (en) | 2019-10-31 | 2021-05-04 | 台达电子企业管理（上海）有限公司 | Transformer and power module with same |
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