CN107946046B - Dual-phase coupling inductor and power supply - Google Patents
Dual-phase coupling inductor and power supply Download PDFInfo
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- CN107946046B CN107946046B CN201711374822.6A CN201711374822A CN107946046B CN 107946046 B CN107946046 B CN 107946046B CN 201711374822 A CN201711374822 A CN 201711374822A CN 107946046 B CN107946046 B CN 107946046B
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- 239000004020 conductor Substances 0.000 claims abstract description 76
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
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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
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Abstract
The embodiment of the invention discloses a dual-phase coupling inductor and a power supply, which comprise a first magnetic core, a second magnetic core, a first winding and a second winding, wherein the first magnetic core and the second magnetic core are connected in a positive opposite way; the side surface of the first magnetic core, which is connected with the second magnetic core, is provided with 5 magnetic columns, each magnetic column is a first side column, a first auxiliary middle column, a main middle column, a second auxiliary middle column and a second side column in sequence, a wire slot is formed between every two adjacent magnetic columns, and each wire slot is a first wire slot, a second wire slot, a third wire slot and a fourth wire slot in sequence; the first winding is provided with a first conductor sheet, a second conductor sheet and a first non-electrode pin; the second winding is provided with a third conductor sheet, a fourth conductor sheet and a second non-electrode pin; the first conductor piece, the second conductor piece, the third conductor piece and the fourth conductor piece are respectively arranged in the first wire groove, the third wire groove, the second wire groove and the fourth wire groove. The embodiment of the invention reduces the height of the double-phase coupling inductor to make the double-phase coupling inductor thin and thin, and is favorable for the thin and thin power supply and terminal equipment.
Description
Technical Field
The embodiment of the invention relates to the technical field of inductors, in particular to a dual-phase coupling inductor and a power supply.
Background
In recent years, the staggered parallel technology using dual-phase or multi-phase coupled inductors has been increasingly applied to power supply design. The staggered parallel circuit is characterized in that multiple power inputs are connected in parallel, the working frequencies of the switching tubes are the same, and the phases are different by a certain angle. Due to the adoption of the staggered parallel structure, ripple waves generated by frequent switching of the switching tube can be greatly reduced, so that the design value of the capacitor can be reduced when the output filter capacitor is designed. The technical effect is more obvious when the DC voltage-stabilizing circuit is applied to the occasion of low voltage and high current, the quality of the DC output voltage is improved, the volume can be reduced, the cost is saved, and a plurality of benefits are brought to the subsequent design. By adopting the staggered parallel technology, the total power is shared by two paths, the power of each path can be reduced, the height and the volume of each path of magnetic element can be greatly reduced, and the volume of the whole circuit is much smaller than that of a single-phase circuit under the same output power condition, so that the power density of a power supply is improved, and the cost of the power supply is reduced.
Along with development of technology, users have increasingly demanded lighter and thinner electronic products, and power supplies are indispensable devices in the electronic products. Currently, the staggered parallel technology using dual-phase or multi-phase coupled inductors is increasingly applied in power supply design, and dual-phase coupled inductors or multi-phase coupled inductors used in the staggered parallel circuit have a critical effect on circuit performance. At present, the existing dual-phase coupling inductor mainly adopts an air gap of a secondary magnetic circuit to adjust the coupling coefficient, so that a secondary magnetic circuit needs to be additionally arranged outside the coupling inductor, and the added secondary magnetic circuit needs to be arranged above the coupling inductor in order to keep the performance of the whole dual-phase coupling inductor, thereby increasing the overall height of the whole dual-phase coupling inductor, and making the dual-phase coupling inductor in the prior art difficult to meet the design requirements of lightening and thinning terminal equipment.
In view of this, how to provide a dual-phase coupled inductor and a power supply for solving the above technical problems is a problem to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention aims to provide a dual-phase coupling inductor and a power supply, which can reduce the height of the dual-phase coupling inductor, make the dual-phase coupling inductor light and thin, and further facilitate the light and thin design of the power supply and terminal equipment.
In order to solve the above technical problems, an embodiment of the present invention provides a dual-phase coupled inductor, which is applied to a power supply, and includes a first magnetic core, a second magnetic core, a first winding and a second winding, wherein:
the first magnetic core and the second magnetic core are connected in a facing manner to form a magnetic flux loop of the coupled inductor; the side surface of the first magnetic core, which is connected with the second magnetic core, is provided with 5 magnetic columns, each magnetic column is a first side column, a first auxiliary middle column, a main middle column, a second auxiliary middle column and a second side column in sequence, a wire slot is formed between every two adjacent magnetic columns, and each wire slot is a first wire slot, a second wire slot, a third wire slot and a fourth wire slot in sequence; the first winding is provided with a first conductor sheet, a second conductor sheet and a first non-electrode pin, and the end parts of the first conductor sheet and the second conductor sheet are respectively provided with a first electrode pin and a second electrode pin; the second winding is provided with a third conductor sheet, a fourth conductor sheet and a second non-electrode pin, and the end parts of the third conductor sheet and the fourth conductor sheet are respectively provided with a third electrode pin and a fourth electrode pin; the first conductor piece, the second conductor piece, the third conductor piece and the fourth conductor piece are respectively arranged in a first wire groove, a third wire groove, a second wire groove and a fourth wire groove.
Optionally, a first step is arranged at one side edge of the upper surface of the first magnetic core; and the two side edges of the bottom of the second magnetic core are respectively provided with a second step and a third step.
Optionally, the first winding is U-shaped, and the first electrode pin and the second electrode pin are both in hook-shaped structures and are both clamped on the second step; the first non-electrode pin is of a hook-shaped structure and is clamped on the first step.
Optionally, the second winding is U-shaped, and the third electrode pin and the fourth electrode pin are in hook-shaped structures and are both clamped on the second step; the second non-electrode pin is of a hook-shaped structure and is clamped on the third step.
Optionally, the widths of the first side column and the second side column are equal; the first secondary center pillar and the second secondary center pillar have equal widths.
Optionally, the widths of the first wire groove, the second wire groove, the third wire groove and the fourth wire groove are equal.
Optionally, the thickness of the first magnetic core is not greater than a first preset threshold value, and the thickness of the second magnetic core is not greater than a second preset threshold value.
Optionally, the first preset threshold is 2mm; the second preset threshold is 1mm.
Optionally, the first winding and the second winding are both windings formed by stamping and bending the tinned copper sheet.
The embodiment of the invention also provides a power supply, which comprises the dual-phase coupling inductor.
The embodiment of the invention provides a dual-phase coupled inductor and a power supply, which comprise a first magnetic core, a second magnetic core, a first winding and a second winding, wherein the first magnetic core and the second magnetic core are connected in a positive opposite way to form a magnetic flux loop of the coupled inductor; the side surface of the first magnetic core, which is connected with the second magnetic core, is provided with 5 magnetic columns, each magnetic column is a first side column, a first auxiliary middle column, a main middle column, a second auxiliary middle column and a second side column in sequence, a wire slot is formed between every two adjacent magnetic columns, and each wire slot is a first wire slot, a second wire slot, a third wire slot and a fourth wire slot in sequence; the first winding is provided with a first conductor sheet, a second conductor sheet and a first non-electrode pin, and the end parts of the first conductor sheet and the second conductor sheet are respectively provided with a first electrode pin and a second electrode pin; the second winding is provided with a third conductor sheet, a fourth conductor sheet and a second non-electrode pin, and the end parts of the third conductor sheet and the fourth conductor sheet are respectively provided with a third electrode pin and a fourth electrode pin; the first conductor piece, the second conductor piece, the third conductor piece and the fourth conductor piece are respectively arranged in the first wire groove, the third wire groove, the second wire groove and the fourth wire groove.
Therefore, the first conductor piece and the second conductor piece of the first winding and the third conductor piece and the fourth conductor piece of the second winding are mutually staggered and arranged in each wire slot of the first magnetic core, so that the first winding surrounds the main center pillar and the second auxiliary center pillar, the second winding surrounds the first auxiliary center pillar and the main center pillar, the main center pillar is surrounded by the first winding and the second winding, and the size of the coupling coefficient of the whole dual-phase coupling inductor is determined by the areas of the first auxiliary center pillar and the second auxiliary center pillar, and therefore the first auxiliary center pillar and the second auxiliary center pillar with different widths can be designed according to actual needs, and further the dual-phase coupling inductor has corresponding coupling coefficients, and the coupling coefficient can be adjusted by adjusting the widths of the first auxiliary center pillar and the second auxiliary center pillar. The embodiment of the invention does not need to additionally arrange a secondary magnetic circuit, thereby reducing the height of the double-phase coupling inductor, leading the double-phase coupling inductor to be light and thin, and being further beneficial to the light and thin design of power supply and terminal equipment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an upper 45 ° structure of a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a lower 45 ° structure of a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first magnetic core in a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first magnetic core in a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second magnetic core in a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a first winding in a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a second winding in a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 8 is an equivalent circuit schematic diagram of a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a coupling inductance test equivalent circuit of a dual-phase coupling inductor according to an embodiment of the present invention;
fig. 10 is a schematic diagram of the magnetic force line directions of the first winding and the second winding of the dual-phase coupling inductor according to the embodiment of the present invention;
fig. 11 is a schematic front view of a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 12 is a schematic top view of a dual-phase coupled inductor according to an embodiment of the present invention;
FIG. 13 is a schematic side view of a dual-phase coupled inductor according to an embodiment of the present invention;
fig. 14 is a schematic rear view of a dual-phase coupled inductor according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a dual-phase coupling inductor and a power supply, which can reduce the height of the dual-phase coupling inductor, make the dual-phase coupling inductor light and thin, and further facilitate the light and thin design of the power supply and terminal equipment.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-13, the dual-phase coupled inductor is applied to a power supply and comprises a first magnetic core 1, a second magnetic core 2, a first winding 3 and a second winding 4, wherein:
the first magnetic core 1 and the second magnetic core 2 are connected in a facing way to form a magnetic flux loop of the coupled inductor; the side surface of the first magnetic core 1, which is connected with the second magnetic core 2, is provided with 5 magnetic columns, each magnetic column is respectively provided with a first side column 11, a first auxiliary middle column 12, a main middle column 13, a second auxiliary middle column 14 and a second side column 15 in sequence, a wire slot is formed between every two adjacent magnetic columns, and each wire slot is respectively provided with a first wire slot 101, a second wire slot 102, a third wire slot 103 and a fourth wire slot 104 in sequence; the first winding 3 is provided with a first conductor sheet 31, a second conductor sheet 32 and a first non-electrode pin 33, and the ends of the first conductor sheet 31 and the second conductor sheet 32 are respectively provided with a first electrode pin 310 and a second electrode pin 320; the second winding 4 is provided with a third conductor sheet 41, a fourth conductor sheet 42 and a second non-electrode pin 43, and the ends of the third conductor sheet 41 and the fourth conductor sheet 42 are respectively provided with a third electrode pin 410 and a fourth electrode pin 420; the first conductor piece 31, the second conductor piece 32, the third conductor piece 41, and the fourth conductor piece 42 are disposed in the first wire groove 101, the third wire groove 103, the second wire groove 102, and the fourth wire groove 104, respectively.
As shown in fig. 1 to 7, the first winding 3 and the second winding 4 in the embodiment of the present invention are alternately disposed in each slot of the first magnetic core 1, that is, the first conductor tab 31 is disposed in the first slot 101, the second conductor tab 32 is disposed in the third slot 103, the third conductor tab 41 is disposed in the second slot 102, the fourth conductor tab 42 is disposed in the fourth slot 104, the first winding 3 surrounds the primary center leg 13 and the second secondary center leg 14, the second winding 4 surrounds the first secondary center leg 12 and the primary center leg 13, and the primary center leg 13 is commonly surrounded by the first winding 3 and the second winding 4. The first electrode pin 310, the second electrode pin 320, the third electrode pin 410, and the fourth electrode pin 420 are connected into a circuit in an application; the first non-electrode pin 33 and the second non-electrode pin 43 will be soldered as non-electrode fixed pins to the circuit board. Specifically, each conductor piece can be arranged in a corresponding wire slot through adhesive, and the first magnetic core and the second magnetic core can be connected through adhesive, so that the specific connection mode is not limited.
Specifically, the working principle of the dual-phase coupling inductor provided in the embodiment of the invention is as follows:
as shown in fig. 8, the equivalent circuit schematic diagram of the dual-phase coupled inductor is that the first electrode pin 310 and the fourth electrode pin 420 are set to the same name end, and when the first winding 3 is tested alone (at this time, the second winding 4 is disconnected), the inductance measured by the first winding 3 through the first electrode pin 310 and the second electrode pin 320 is L1. When the second winding 4 is tested alone (when the first winding 3 is turned off), the inductance of the second winding 4 measured through the third electrode pin 410 and the fourth electrode pin 420 is L2.
The coupling inductance test equivalent circuit schematic diagram of the dual-phase coupling inductor is shown in fig. 9, wherein a first electrode pin 310 and a fourth electrode pin 420 are connected in parallel, and a common terminal after being connected in parallel is used as a test point 51; the second electrode pin 320 and the third electrode pin 410 are connected in parallel, with their common terminal being the test point 52. The inductance measured by the test points 51 and 52 is the coupling inductance Lm.
According to the formula of the coupling inductance calculation principle, lm=l1+l2-2M (where M is a coupling coefficient). As can be seen from the magnetic force line diagram shown in fig. 10, in the first side leg 11, the main middle leg 13 and the second side leg 15, the magnetic force lines generated by the first winding 3 and the second winding 4 are opposite in direction and cancel each other out; in the first auxiliary center leg 12 and the second auxiliary center leg 14, the magnetic force lines generated by the first winding 3 and the second winding 4 have the same direction and are mutually reinforced.
Therefore, the magnitude of the coupling coefficient M of the dual-phase coupled inductor in the present application is determined by the magnitudes of the cross-sectional areas of the first sub-center pillar 12 and the second sub-center pillar 14. Therefore, under the condition of unchanged other sizes and installation conditions, different coupling coefficients M and further different coupling inductance values Lm can be obtained by adjusting the widths of the first auxiliary middle column 12 and the second auxiliary middle column 14 independently so as to meet the requirements of different staggered parallel circuit designs. That is, in practical applications, the cross-sectional areas of the first auxiliary center pillar 12 and the second auxiliary center pillar 14 may be determined according to practical requirements, so as to determine the corresponding coupling coefficients, and when the cross-sectional areas of the auxiliary center pillar 12 and the second auxiliary center pillar 14 are determined, the coupling coefficients of the corresponding dual-phase coupling inductors are determined. Therefore, the dual-phase coupling inductor in the application does not need to additionally set a secondary magnetic circuit to adjust the coupling coefficient, so that the flat design of the dual-phase coupling inductor is realized, the height of the dual-phase coupling inductor is reduced, and the power supply and the corresponding products are light and thin.
In addition, for the design with larger element arrangement density, the heat dissipation effect is poor because the heat dissipation area at the top of the dual-phase coupling inductor in the prior art is smaller, and the flattened design of the dual-phase coupling inductor in the embodiment of the invention increases the heat dissipation area at the top, so that the dual-phase coupling inductor in the application has better heat dissipation effect compared with the dual-phase coupling inductor in the prior art.
Further, as shown in fig. 8 and 9, a first step is provided at one side edge of the upper surface of the first magnetic core 1 in the embodiment of the present invention; the two side edges of the bottom of the second magnetic core 2 are respectively provided with a second step and a third step.
It should be noted that, in the embodiment of the invention, a first step is provided at one side edge of the upper surface of the first magnetic core 1, 5 magnetic columns are provided at the lower surface thereof, each conductor piece of each winding is disposed in each wire slot, and corresponding pins are located outside the wire slots, so that the corresponding pins of each winding can be conveniently clamped to the first step, and also, a second step and a third step are provided at two side edges of the bottom of the second magnetic core 2, so that the corresponding pins of each winding can be conveniently clamped to the corresponding steps. When the upper surface of the first magnetic core 1 is set to be a plane, a certain pin is required to be clamped on the upper surface of the first magnetic core 1, and protrudes out of the upper surface of the first magnetic core 1, so that the height of the whole dual-phase coupling inductor is increased, and the same problem can occur when the lower surface of the second magnetic core 2 is set to be a plane, so that a first step is arranged at the edge of one side of the upper surface of the first magnetic core 1 in the embodiment of the invention; the two side edges of the bottom of the second magnetic core 2 are respectively provided with a second step and a third step.
Of course, it is also possible to provide the two side edges of the upper surface of the first magnetic core with a step, and how to provide the steps is determined according to the actual situation. In addition, the specific widths and heights of the first step, the second step and the third step can be determined according to the length and thickness of each pin in actual situations, and the embodiment of the invention is not limited in particular.
Further, as shown in fig. 6, the first winding 3 is U-shaped, and the first electrode pin 310 and the second electrode pin 320 are both in hook-shaped structures and are both clamped on the second step; the first non-electrode pin 33 is in a hook structure and is clamped on the first step.
Specifically, the first winding 3 in the embodiment of the present invention is specifically in a U-shaped structure, and the first electrode pin 310 and the second electrode pin 320 are in a hook-shaped structure, and the hook portion is in a U-shape and is clamped on the second step, so that the thicknesses of the first electrode pin 310 and the second electrode pin 320 are as equal as possible to the height of the second step, and the thicknesses of the first non-electrode pin 33 are as equal as the height of the first step, so that the first electrode pin 310 and the second electrode pin 320 can be complemented with the second step, and the first non-electrode pin 33 can be complemented with the first step, thereby avoiding increasing the height of the whole dual-phase coupling inductor, as shown in fig. 11-14.
Of course, the first electrode pin 310, the second electrode pin 320 and the first non-electrode pin 33 are not limited to be hook-shaped structures, but may be other specific structures, and the specific structures thereof may be determined according to actual situations, which are not particularly limited in the embodiment of the present invention, and the purpose of the embodiment of the present invention may be achieved.
Further, as shown in fig. 7, the second winding is U-shaped, and the third electrode pin 410 and the fourth electrode pin 420 are hook-shaped and are both clamped on the second step; the second non-electrode pin 43 is in a hook structure and is clamped on the third step.
Specifically, the second winding 4 in the embodiment of the present invention is specifically in a U-shaped structure, and the third electrode pin 410 and the fourth electrode pin 420 are in a hook-shaped structure, and the hook portion is in a U-shape and is clamped on the second step, so that the thicknesses of the third electrode pin 410 and the fourth electrode pin 420 are as equal as possible to the height of the second step, and the thickness of the second non-electrode pin 43 is as equal as the height of the first step, so that the first electrode pin 310 and the second electrode pin 320 can be complemented with the second step, and the second non-electrode pin 43 is complemented with the first step, thereby avoiding increasing the height of the whole dual-phase coupling inductor, as shown in fig. 11-14.
Of course, the third electrode pin 410, the fourth electrode pin 420 and the first non-electrode pin 43 are not limited to be hook-shaped structures, but may be other specific structures, and the specific structures thereof may be determined according to practical situations, which are not particularly limited in the embodiment of the present invention, and the purpose of the embodiment of the present invention may be achieved.
Specifically, in order to ensure that the dual-phase coupled inductor has better performance, the widths of the first side post 11 and the second side post 15 are preferably equal in the embodiment of the present invention; the widths of the first subsidiary center pillar 12 and the second subsidiary center pillar 14 are made equal.
Of course, the specific widths of the first side pillar 11, the second side pillar 15, the first sub-center pillar 12, and the second sub-center pillar 14 may be determined according to actual conditions, and the embodiment of the present invention is not particularly limited.
In order to further ensure that the dual-phase coupled inductor has better performance, the width of the first wire groove 101, the second wire groove 102, the third wire groove 103 and the fourth wire groove 104 are preferably equal in the embodiment of the present invention.
Of course, the width of each wire slot may be unequal, and may be determined specifically according to the actual situation, and the specific width value of each wire slot may be determined according to the actual situation, which is not limited in this application.
Optionally, the thickness of the first magnetic core 1 is not greater than a first preset threshold value, and the thickness of the second magnetic core 2 is not greater than a second preset threshold value.
Optionally, the first preset threshold is 2mm; the second preset threshold is 1mm.
Alternatively, the thickness of the first magnetic core 1 is not greater than 2mm, the thickness of the second magnetic core 2 is not greater than 1mm, and the specific thickness values of the first magnetic core 1 and the second magnetic core 2 may be determined according to the actual situation, which is not particularly limited in the embodiment of the present invention. In addition, the lengths of the first magnetic core 1 and the second magnetic core 2 in the present application may not exceed 20.5mm, and the widths may not exceed 11.5mm, and of course, specific values thereof may be determined according to actual situations, which is not particularly limited in the embodiment of the present invention.
Optionally, the first winding 3 and the second winding 4 are windings formed by punching and bending a tinned copper sheet.
Of course, the first winding 3 and the second winding 4 may be made of other conductive materials, not limited to tin-plated copper sheets, and the first winding 3 and the second winding 4 may be made of other conductive materials.
Therefore, the first conductor piece and the second conductor piece of the first winding and the third conductor piece and the fourth conductor piece of the second winding are mutually staggered and arranged in each wire slot of the first magnetic core, so that the first winding surrounds the main center pillar and the second auxiliary center pillar, the second winding surrounds the first auxiliary center pillar and the main center pillar, the main center pillar is surrounded by the first winding and the second winding, and the size of the coupling coefficient of the whole dual-phase coupling inductor is determined by the areas of the first auxiliary center pillar and the second auxiliary center pillar, and therefore the first auxiliary center pillar and the second auxiliary center pillar with different widths can be designed according to actual needs, and further the dual-phase coupling inductor has corresponding coupling coefficients, and the coupling coefficient can be adjusted by adjusting the widths of the first auxiliary center pillar and the second auxiliary center pillar. The embodiment of the invention does not need to additionally arrange a secondary magnetic circuit, thereby reducing the height of the double-phase coupling inductor, leading the double-phase coupling inductor to be light and thin, and being further beneficial to the light and thin design of power supply and terminal equipment.
On the basis of the embodiment, the embodiment of the invention also provides a power supply which comprises the dual-phase coupling inductor.
It should be noted that, the embodiments of the present invention are beneficial to the light and thin design of the power supply, and further beneficial to the light and thin design of the terminal device.
In addition, for a specific description of the dual-phase coupled inductor according to the embodiment of the present invention, reference is made to the above embodiment, and the description thereof is omitted herein.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A dual phase coupled inductor for use in a power supply, comprising a first magnetic core, a second magnetic core, a first winding, and a second winding, wherein:
the first magnetic core and the second magnetic core are connected in a facing manner to form a magnetic flux loop of the coupled inductor; the side surface of the first magnetic core, which is connected with the second magnetic core, is provided with 5 magnetic columns, each magnetic column is a first side column, a first auxiliary middle column, a main middle column, a second auxiliary middle column and a second side column in sequence, a wire slot is formed between every two adjacent magnetic columns, and each wire slot is a first wire slot, a second wire slot, a third wire slot and a fourth wire slot in sequence; the first winding is provided with a first conductor sheet, a second conductor sheet and a first non-electrode pin, and the end parts of the first conductor sheet and the second conductor sheet are respectively provided with a first electrode pin and a second electrode pin; the second winding is provided with a third conductor sheet, a fourth conductor sheet and a second non-electrode pin, and the end parts of the third conductor sheet and the fourth conductor sheet are respectively provided with a third electrode pin and a fourth electrode pin; the first conductor piece, the second conductor piece, the third conductor piece and the fourth conductor piece are respectively arranged in a first wire slot, a third wire slot, a second wire slot and a fourth wire slot; wherein:
the first windings and the second windings are arranged in each wire slot of the first magnetic core in a staggered mode, the first conductor sheet is arranged in the first wire slot, the second conductor sheet is arranged in the third wire slot, the third conductor sheet is arranged in the second wire slot, the fourth conductor sheet is arranged in the fourth wire slot, the first windings encircle the main center pillar and the second auxiliary center pillar, the second windings encircle the first auxiliary center pillar and the main center pillar, and the main center pillar is jointly encircled by the first windings and the second windings; the first electrode pin, the second electrode pin, the third electrode pin and the fourth electrode pin are used for being connected into a circuit; the first non-electrode pin and the second non-electrode pin are used for being used as non-electrode fixed pins to be welded with a circuit board.
2. The dual phase coupled inductor as claimed in claim 1, wherein an edge of one side of the upper surface of the first magnetic core is provided with a first step; and the two side edges of the bottom of the second magnetic core are respectively provided with a second step and a third step.
3. The dual-phase coupled inductor of claim 2, wherein the first winding is U-shaped, the first electrode pin and the second electrode pin are both hook-shaped structures and are both clamped on the second step; the first non-electrode pin is of a hook-shaped structure and is clamped on the first step.
4. The dual phase coupled inductor of claim 3, wherein the second winding is U-shaped, the third electrode pin and the fourth electrode pin are hook-shaped structures and are both clamped on the second step; the second non-electrode pin is of a hook-shaped structure and is clamped on the third step.
5. The dual phase coupled inductor of any of claims 1-4, wherein the widths of the first leg and the second leg are equal; the first secondary center pillar and the second secondary center pillar have equal widths.
6. The dual phase coupled inductor of claim 5, wherein the widths of the first wire chase, the second wire chase, the third wire chase, and the fourth wire chase are equal.
7. The dual phase coupled inductor of claim 6, wherein the thickness of the first magnetic core is no greater than a first predetermined threshold and the thickness of the second magnetic core is no greater than a second predetermined threshold.
8. The dual phase coupled inductor of claim 7, wherein the first preset threshold is 2mm; the second preset threshold is 1mm.
9. The dual phase coupled inductor of claim 8, wherein the first winding and the second winding are each a winding formed by stamping and bending a tin-plated copper sheet.
10. A power supply comprising a dual phase coupled inductor as claimed in any one of claims 1 to 9.
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| CN203552850U (en) * | 2013-11-06 | 2014-04-16 | 东莞铭普光磁股份有限公司 | Ultrathin two-phase coupling inductor |
| CN103871716A (en) * | 2014-02-18 | 2014-06-18 | 同济大学 | Integrated magnetic structure |
| CN105097222A (en) * | 2015-07-22 | 2015-11-25 | 上海正泰电源系统有限公司 | Magnetic coupling inductor of interleaving parallel converter and magnetic core |
| CN106935384A (en) * | 2015-12-18 | 2017-07-07 | 沃尔泰拉半导体有限公司 | Coupling inductor array and correlation technique |
| CN207572208U (en) * | 2017-12-19 | 2018-07-03 | 东莞铭普光磁股份有限公司 | A kind of two-phase coupling inductor and power supply |
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| CN112700961A (en) * | 2016-02-26 | 2021-04-23 | 维谛技术有限公司 | Inductor winding method for reducing power frequency magnetic flux density of coupling inductor and coupling inductor with low power frequency magnetic flux density |
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| CN203552850U (en) * | 2013-11-06 | 2014-04-16 | 东莞铭普光磁股份有限公司 | Ultrathin two-phase coupling inductor |
| CN103871716A (en) * | 2014-02-18 | 2014-06-18 | 同济大学 | Integrated magnetic structure |
| CN105097222A (en) * | 2015-07-22 | 2015-11-25 | 上海正泰电源系统有限公司 | Magnetic coupling inductor of interleaving parallel converter and magnetic core |
| CN106935384A (en) * | 2015-12-18 | 2017-07-07 | 沃尔泰拉半导体有限公司 | Coupling inductor array and correlation technique |
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