CN114156041A - Magnetic core structure and magnetic element - Google Patents
Magnetic core structure and magnetic element Download PDFInfo
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- CN114156041A CN114156041A CN202111485042.5A CN202111485042A CN114156041A CN 114156041 A CN114156041 A CN 114156041A CN 202111485042 A CN202111485042 A CN 202111485042A CN 114156041 A CN114156041 A CN 114156041A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
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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
Abstract
The invention relates to a magnetic core structure and a magnetic element comprising the same. The magnetic core structure comprises a first magnetic core cover plate, a second magnetic core cover plate, at least two winding posts and a side post, wherein the at least two winding posts and the side post are positioned between the first magnetic core cover plate and the second magnetic core cover plate; first side portion, third side portion and second side portion all are used for supporting first magnetic core apron or second magnetic core apron, and first side portion and second side portion support first magnetic core apron or second magnetic core apron from relative both sides respectively for the magnetic core structure after the combination is more firm. The magnetic element comprises the magnetic core structure, the at least two winding posts are provided with windings, and the directions of magnetic fluxes on the adjacent winding posts are opposite, so that the magnetic fluxes between the cover plates of the magnetic core can be mutually offset, the size and the weight of the magnetic core structure are reduced, and the loss of the magnetic core is reduced.
Description
Technical Field
The invention relates to a magnetic core structure and a magnetic element.
Background
With the development of technologies such as big data and cloud computing, the consumption of electric energy is also increasing, which promotes the rapid development of the switching power supply technology, so that the switching power supply product needs to have the characteristics of high efficiency, high power density and the like. However, in the prior art, the magnetic element still occupies a large proportion of the volume space and the weight in the whole power supply system. In order to reduce the size of the magnetic device, a common approach is to increase the operating frequency of the switching power supply. However, the increase in the operating frequency causes an increase in losses associated with the operating frequency, such as an increase in switching and driving losses of the switching device, an increase in ac losses of the magnetic element, and the like, and also reduces the efficiency of the switching power supply. In addition, simply increasing the operating frequency has a limit to the volume of the magnetic element, which limits further miniaturization of the magnetic element.
There is a magnetic core structure in the prior art that includes a first magnetic cover, a second magnetic cover, two winding posts and a common side post. The winding posts and the public side post are arranged between the first magnetic cover and the second magnetic cover, at least two winding posts are arranged opposite to the public side post, the side face, facing the winding posts, of the public side post is provided with a protruding portion, and the protruding portion extends towards the direction of a gap between every two adjacent winding posts. The magnetic element in the technical scheme integrates the functions of the inductor and the transformer, power expansion is easy to realize, and the problems of heat dissipation, cost and the like caused by the increase of the number of layers of the printed circuit board are avoided. However, this solution has the following drawbacks:
(1) the winding mode that this technical scheme provided for the magnetic flux direction of two wrapping posts is unanimous, and the magnetic flux in first magnetic lid and the second magnetic lid does not have the offset. Under the design scene that needs to guarantee that magnetic flux density is little, first magnetic cover, second magnetic cover and side post need have certain thickness, just can guarantee that magnetic flux density is little, and this inevitably increases the volume and the weight of magnetic core structure in fact.
(2) The air gap is arranged on the winding post, so that the winding post does not support the magnetic cover on the upper portion, when the first magnetic cover and the second magnetic cover are assembled, the magnetic cover on the upper portion can be supported only by the side post and the protruding portion, but the side post and the protruding portion are only located on one side of the magnetic cover and form a thin and long shape along the length direction of the magnetic cover, the magnetic cover on the upper portion cannot be stably supported, the other side without the side post and the protruding portion does not form effective support for the magnetic cover on the upper portion, and the structure of the first magnetic cover and the second magnetic cover after the first magnetic cover and the second magnetic cover are assembled is unstable. Meanwhile, in some application scenarios, the windings on adjacent winding posts need to be connected in series or in parallel, and the bumps in the patent affect the wiring.
Disclosure of Invention
In order to solve the technical defects in the prior art, the present invention provides a magnetic core structure and a magnetic element including the magnetic core structure.
The invention provides a magnetic core structure, which comprises a first magnetic core cover plate, a second magnetic core cover plate, at least two winding posts and a side post, wherein the at least two winding posts and the side post are positioned between the first magnetic core cover plate and the second magnetic core cover plate; the at least two winding posts are positioned in an area surrounded by three surfaces formed by sequentially connecting the first side edge part, the third side edge part and the second side edge part; the first side portion, the third side portion and the second side portion are used for supporting the first magnetic core cover plate or the second magnetic core cover plate, and the first side portion and the second side portion support the first magnetic core cover plate or the second magnetic core cover plate from two opposite sides respectively.
In a preferred embodiment, the direction of the greater length dimension of the cross section of the at least one winding post is disposed toward the opening of the side post.
In a preferred embodiment, the end of the winding post facing the opening of the side post does not exceed a connecting line between the end of the first side edge at the opening of the side post and the end of the second side edge at the opening of the side post.
In a preferred embodiment, the inner side of the side pillar is a continuous surface without a protrusion.
In a preferred embodiment, each of the first side edge portion, the third side edge portion and the second side edge portion extends linearly or curvedly in a longitudinal direction thereof; the first side edge part and the third side edge part are in arc transition connection, or the first side edge part and the third side edge part are in certain angle connection; the second side edge part and the third side edge part are in arc transition connection, or the second side edge part and the third side edge part are in certain angle connection.
In a preferred embodiment, the first side edge, the third side edge and the second side edge each have a certain curvature in a longitudinal direction thereof, the first side edge and the third side edge are connected in an arc transition, and the second side edge and the third side edge are connected in an arc transition.
In a preferred embodiment, the first side edge, the third side edge and the second side edge extend in a straight line in the length direction, the first side edge and the third side edge are connected in an arc transition manner, the second side edge and the third side edge are connected in an arc transition manner, and the first side edge and the second side edge are perpendicular to the length direction of the third side edge in the length direction.
In a preferred embodiment, the first side edge portion and the second side edge portion are equal or unequal in length.
As a preferred embodiment, two winding posts and one side post are disposed on the second magnetic core cover plate, the end portions of the two winding posts close to the first magnetic core cover plate are provided with air gaps, the second magnetic core cover plate, the two winding posts and the one side post form an E-type magnetic core, the first magnetic core cover plate forms an I-type magnetic core, and the E-type magnetic core and the I-type magnetic core form an EI-type magnetic core structure.
As a preferred embodiment, the two winding posts and the one side post between the first magnetic core cover plate and the second magnetic core cover plate are divided into two parts along a plane parallel to the magnetic core cover plate, and the two parts are respectively arranged on the first magnetic core cover plate and the second magnetic core cover plate; an air gap is arranged between the two winding post parts on the first magnetic core cover plate and the two winding post parts on the second magnetic core cover plate; two wrapping posts and side columns on the first magnetic core cover plate form an E-shaped magnetic core, two wrapping posts and side columns on the second magnetic core cover plate form another E-shaped magnetic core, and the two E-shaped magnetic cores form an EE-shaped magnetic core structure.
Another aspect of the present invention is to provide a magnetic element including the magnetic core structure of any one of the foregoing embodiments, wherein the at least two winding posts are provided with windings, and the magnetic fluxes on adjacent winding posts are opposite in direction.
In a preferred embodiment, the winding is fed or discharged through the opening of the side column.
In a preferred embodiment, the direction of current flow through the windings on adjacent legs is set so that the direction of magnetic flux on adjacent legs is opposite.
In a preferred embodiment, the winding direction of the windings on adjacent winding legs is configured such that the magnetic flux directions on adjacent winding legs are opposite.
In a preferred embodiment, the windings on the at least two winding posts are used individually, in series, or in parallel.
In a preferred embodiment, at least two windings are provided on at least one of the winding legs.
In a preferred embodiment, two windings are disposed on at least one of the at least two winding posts, wherein one winding serves as a primary winding and the other winding serves as a secondary winding, so as to form a transformer; at least one other winding leg is provided with a winding to form an inductor.
Compared with the prior art, the invention has the remarkable advantages and beneficial effects that:
1. the side column comprises a first side edge part, a second side edge part and a third side edge part, wherein the first side edge part and the second side edge part are positioned on two sides, and the third side edge part is connected between the first side edge part and the second side edge part; two wrapping posts set up at the side post inboard, and two wrapping posts are located the trilateral region of encircleing that first side portion, third side portion and second side portion connected gradually formation promptly. Except for the supporting function of the third side part, the first side part and the second side part respectively support the first magnetic core cover plate or the second magnetic core cover plate from the opposite left side and right side, so that the combined magnetic core structure is more stable.
2. The direction of the current flowing through the windings on the adjacent winding posts is set so that the directions of the magnetic fluxes on the adjacent winding posts are opposite, or the winding directions of the windings on the adjacent winding posts are set so that the directions of the magnetic fluxes on the adjacent winding posts are opposite. So that the magnetic fluxes between the cover plates of the magnetic cores can be offset with each other. Under the application scene of realizing that magnetic flux density is little, can reduce the volume and the weight of magnetic core structure, reduce the loss of magnetic core.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
Fig. 1 is a schematic diagram illustrating a magnetic core structure according to an exemplary embodiment of the present invention.
Fig. 2 is a schematic view of a magnetic core structure according to another exemplary embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating a magnetic core structure according to another exemplary embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating a magnetic core structure according to another exemplary embodiment of the present invention.
Fig. 5 is a schematic diagram of a magnetic element structure according to an exemplary embodiment of the present invention.
Fig. 6 is a schematic diagram of a magnetic element structure according to another exemplary embodiment of the present invention.
Fig. 7 is a schematic diagram of a magnetic element structure according to another exemplary embodiment of the present invention.
Fig. 8 is a schematic diagram of a magnetic element structure according to another exemplary embodiment of the present invention.
Figure 9 is a schematic diagram of a magnetic element structure according to another exemplary embodiment of the present invention.
Figure 10 is a schematic diagram of a magnetic element structure according to another exemplary embodiment of the present invention.
Fig. 11 is a schematic diagram of a magnetic element structure according to another exemplary embodiment of the present invention.
Detailed Description
It is easily understood that various embodiments of the present invention can be conceived by those skilled in the art according to the technical solution of the present invention without changing the essential spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention. Rather, these embodiments are provided so that this disclosure will be thorough and complete. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the innovative concepts of the invention.
Fig. 1 is a schematic diagram of an embodiment of a magnetic core structure according to the present invention. As shown in fig. 1, the core structure of the present embodiment includes a first core cover a located at the upper portion, a second core cover B located at the lower portion, two winding legs D, E and a "Contraband" type leg C.
Two winding posts D, E and a "Contraband" shaped leg C are disposed between the first core cover panel A and the second core cover panel B. The two winding posts D, E are provided with an air gap. The Contraband-shaped side pillar C includes a first side portion C1 and a second side portion C2 located at two sides, and a third side portion C3 connected between the first side portion C1 and the second side portion C2, wherein the first side portion C1, the third side portion C3, and the second side portion C2 are sequentially connected to form a structure with three sides surrounding and one side opening. The two wrapping posts D, E are disposed inside the "Contraband" type side post C, i.e., the two wrapping posts D, E are located in the three-side surrounded area formed by the sequential connection of the first side portion C1, the third side portion C3 and the second side portion C2.
After the first magnetic core cover plate a and the second magnetic core cover plate B are assembled, the first side edge portion C1, the third side edge portion C3 and the second side edge portion C2 all support the first magnetic core cover plate a or the second magnetic core cover plate B, and the two winding posts D, E are provided with air gaps and do not support the first magnetic core cover plate a or the second magnetic core cover plate B. The first side portion C1, the third side portion C3 and the second side portion C2 are connected in sequence to form a structure with three sides surrounded and one side opened, so that the ends of the first side portion C1 and the second side portion C2 extend to the opening of the side pillar C from the opposite left and right sides respectively, and the first side portion C1 and the second side portion C2 support the first magnetic core cover plate a or the second magnetic core cover plate from the opposite left and right sides respectively, so that the combined magnetic core structure is more stable.
As a preferable mode of the present embodiment, the direction in which the cross-sectional length dimension of the winding post is larger is disposed toward the opening of the side post. Specifically, the two winding posts D, E have cross-sections with lengths perpendicular to each other in both the lateral and longitudinal directions, wherein the direction of the greater length dimension is toward the opening of the side post. As shown in fig. 1, the two wrapping posts D, E are racetrack shaped in cross-section, and the length dimension of the two wrapping posts D, E parallel to the first side portion C1 and the second side portion C2 is greater than the width dimension perpendicular to the third side portion C3. With this arrangement, the size ratio of the first side portion C1 (or the second side portion C2) to the third side portion C3 can be increased without making the magnetic core structure longer along the third side portion C3 and shorter along the first side portion C1 and the second side portion C2, and preventing the magnetic core structure as a whole from assuming an elongated structure. With respect to the elongated frame, if the lengths of the first side portion C1 and the second side portion C2 are longer, that is, the lengths of the two side supporting portions are increased, the supporting stability can be further increased. If the first and second side portions C1 and C2 are very short in length and the third side portion C3 is long, the main supporting force remains on the third side portion C3, and there is no technical effect of effective two-side support. Generally, the lengths of the first side portion C1 and the second side portion C2 are adaptively set according to the length of the cross-section of the winding post D, E.
As another preferable mode of the present embodiment, the end of the at least two wrapping posts D, E facing the opening of the side post C does not exceed the connecting line between the end of the first side edge portion C1 located at the opening of the side post and the end of the second side edge portion C2 located at the opening of the side post. That is, the ends of the first side portion C1 and the second side portion C2 facing the side post opening direction extend all the way to the side post opening direction and beyond the ends of the two winding posts D, E facing the side post C opening. In this way, the two winding posts D, E are located entirely within the region surrounded by the three faces formed by the first side C1, the third side C3, and the second side C2 connected in sequence, and the overall center of gravity of the core structure is located entirely between the first side C1 and the second side C2. The first side part C1 and the second side part C2 support the first core cover plate a or the second core cover plate from the opposite left and right sides, respectively, so that the combined core structure is more stable.
In another preferred embodiment of the present invention, the inner side of the side post is a continuous surface and is not provided with the projection. That is, the first side portion C1, the third side portion C3, and the second side portion C2 are connected in sequence, and the inner side thereof is a continuous surface, so that the winding wire is not affected. If the inner side of the side column is provided with the bulge, the bulge needs to be avoided when the winding is wired, and the wiring is inconvenient.
In another preferred embodiment of the present invention, the first side edge portion C1, the third side edge portion C3, and the second side edge portion C2 extend linearly or curvedly in the longitudinal direction. The first side portion C1, the third side portion C3, and the second side portion C2 may have a straight-bar structure, a curved-extending structure, or an arc structure in the longitudinal direction.
As an alternative embodiment of this embodiment, the cross-sectional shape of the winding post D, E may be one or more of a square shape, a circular shape, an oval shape, or a racetrack shape, and the cross-sectional shape of the winding post D, E shown in fig. 1 is a racetrack shape, or may be arbitrarily combined according to actual requirements, for example, the cross-sectional shape of the winding post D is a racetrack shape, and the cross-sectional shape of the winding post E is a circular shape. The cross-sectional area of the wrapping post D, E can be set according to actual needs, and the cross-sectional area of the wrapping post D and the cross-sectional area of the wrapping post E can be equal or unequal. If the cross section of the winding post D is square or round, and the cross section of the winding post E is oval or racetrack-shaped, the length direction of the cross section of the winding post E with larger size is arranged towards the opening of the side post.
In an optional implementation manner of this embodiment, the lengths of the first side portion C1 and the second side portion C2 may be set according to actual requirements, and the lengths of the first side portion C1 and the second side portion C2 may be equal or may not be equal. Meanwhile, according to practical requirements, the end surfaces of the first side portion C1 and the second side portion C2 in the opening direction of the side pillar C may be set to exceed or not exceed the end surface of the winding pillar D, E in the opening direction.
In an alternative embodiment of the present invention, the cross-sectional shapes of the first side portion C1, the second side portion C2 and the third side portion C3 of the side pillar C may be rectangular or other shapes according to actual requirements. The cross-sectional areas of the first side portion C1, the second side portion C2 and the connecting portion C3 may be set according to actual requirements, and the cross-sectional areas of the first side portion C1, the second side portion C2 and the connecting portion C3 may be equal or unequal.
In an alternative embodiment of this embodiment, the connection between the first side edge C1 and the third side edge C3, and the connection between the second side edge C2 and the third side edge C3 may be an arc, a right angle, a blunt angle, or any combination thereof. For example, the first side portion C1 and the third side portion C3 may be connected in an arc, or the first side portion C1 and the third side portion C3 may be connected at a right or obtuse angle. In the embodiment shown in FIG. 1, the junction of the first and second side portions C1 and C2 and the third side portion C3 has an inner side with an arc shape and an outer side with a right angle. It will be appreciated that other ways of transitioning connections may be employed in the embodiment shown in fig. 1.
In the embodiment shown in fig. 1, the first side portion C1, the third side portion C3, and the second side portion C2 extend linearly in the longitudinal direction, the first side portion C1 and the third side portion C3 are connected in an arc transition, the second side portion C2 and the third side portion C3 are connected in an arc transition, and the first side portion C1 and the second side portion C2 are perpendicular to the longitudinal direction of the third side portion C3 in the longitudinal direction.
The two winding posts D, E of the magnetic core structure of the invention are both provided with air gaps, the length of the air gap of the two winding posts D, E can be set according to actual requirements, the lengths of the air gaps on the D post and the E post can be equal or unequal, and the Contraband-shaped side post C is not provided with an air gap.
The winding column D, E of the magnetic core structure can be set into any combination of a transformer magnetic column and an inductance magnetic column according to actual requirements; when the core structure is used as an inductor core, the winding posts D, E may all be configured as inductive magnetic posts; when the core structure is used as a transformer core, the winding legs D, E may all be configured as transformer legs; when the magnetic core structure is used as a combined magnetic core of an inductor and a transformer, the winding post D can be set as an inductance magnetic post, and the winding post E can be set as a transformer magnetic post.
The windings on the winding legs D, E may be connected in series, in parallel, independently, or any combination thereof, depending on the application. When the winding is used as an inductor, the winding on the winding post D and the winding on the winding post E can be connected in series to form the inductor with larger inductance; or the winding on the winding post D and the winding on the winding post E can be connected in parallel to form a high-current inductor; the winding on winding post D and the winding on winding post E can also be used separately to form two independent inductors.
In the core structure shown in fig. 1, the second core cover B, the two winding posts D, E and the "Contraband" type side post E form an irregular "E" type core, the first core cover a forms an "I" type core, and the "E" type core and the "I" type core can form an "EI" type core structure.
Another embodiment of a magnetic core structure, as shown in fig. 2, may be an "EE" type magnetic core structure. The core structure includes a first core cover a, a second core cover B, two winding legs D, E and a "Contraband" type leg C. The winding column D, E and the side column C are divided into two parts along a plane parallel to the cover plate of the magnetic core, the two parts are respectively arranged on the first cover plate A and the second cover plate B of the magnetic core, so as to respectively form an 'E' -shaped magnetic core, and the two 'E' -shaped magnetic cores can form an 'EE' -shaped magnetic core structure. There is an air gap between winding post D, E on first core cover a and winding post D, E on second core cover B, and winding post D, E on first core cover a is not in contact with winding post D, E on second core cover B.
The number of the winding posts of the magnetic core structure is not limited to two, more winding posts can be arranged according to actual requirements, and power supply multi-path output and power improvement can be realized by increasing the number of the winding posts in the magnetic core structure. For example, fig. 3 is a perspective view of an embodiment in which the number of winding legs in the magnetic core structure is three. The core structure of fig. 3 differs from the embodiment of fig. 1 in that the structure of fig. 3 has three winding legs D, E, F. The three winding posts D, E, F can be arranged as any combination of transformer magnetic posts or inductance magnetic posts according to actual requirements, and form an inductor or a transformer or a combination of the inductor and the transformer. Fig. 4 is a perspective view of an embodiment in which the number of winding legs in the magnetic core structure is four. The core structure of fig. 4 differs from the embodiment of fig. 1 in that the structure of fig. 4 has four winding legs D, E, F, G. The four winding posts D, E, F, G can be arranged as any combination of transformer magnetic posts and inductance magnetic posts according to actual requirements, and form an inductor or a transformer or a combination of the inductor and the transformer.
Other structures or variations of the magnetic core structure shown in fig. 3 and 4 are the same as the magnetic core structure of the embodiment shown in fig. 1, and are not described again here.
Fig. 5 is a perspective view of an embodiment of a magnetic element according to the present invention, the magnetic element including a core structure and a winding wound around a winding post.
The core structure of the embodiment of the magnetic element shown in fig. 5 is the above-mentioned "EE" type core structure, and includes a first core cover a located at the upper portion, a second core cover B located at the lower portion, two winding posts D, E, and side posts C; winding post D, E and side post C are divided into two parts along the plane parallel to the core cover, the lower part of winding post D, E and side post C is set on the second core cover B, the upper part of winding post D, E and side post C is set on the first core cover A, thus forming an "E" type magnetic core, two "E" type magnetic cores can form an "EE" type magnetic core structure.
In the embodiment shown in fig. 5, W1 and W2 are windings around winding posts D and E, respectively, and windings W1 and W2 may be PCBs, enameled wires, triple insulated wires, copper bars, or other forms of windings.
In the embodiment shown in fig. 5, winding leg D forms an inductor with winding W1, and winding leg E forms another inductor with winding W2. The windings W1 and W2 can be used independently, or W1 and W2 can be used in series or in parallel according to actual requirements. The magnetic flux generated on the winding post D by the current in the winding W1 is phi 1, the magnetic flux phi 1 has a first direction, the magnetic flux generated on the winding post E by the current in the winding W2 is phi 2, and the magnetic flux phi 2 has a second direction, wherein the first direction and the second direction are opposite directions, so that the magnetic flux in the first magnetic core cover plate A and the second magnetic core cover plate B can be reduced, and the thicknesses of the first magnetic core cover plate A and the second magnetic core cover plate B can be reduced. As shown in fig. 5, the direction of the current I1 flowing through the winding W1 is clockwise, the direction of the magnetic flux Φ 1 generated in the winding leg D is downward, the direction of the current I2 flowing through the winding W2 is counterclockwise, the direction of the magnetic flux Φ 2 generated in the winding leg E is upward, and the direction of the magnetic flux Φ 1 is opposite to the direction of the magnetic flux Φ 2. In short, the direction of the current flowing through the windings on adjacent winding legs can be set so that the directions of the magnetic fluxes on adjacent winding legs are opposite. Or the winding directions of the windings on the adjacent winding posts are set so that the magnetic fluxes on the adjacent winding posts are opposite in direction.
And the winding W1 and the winding W2 are led in and out through the openings of the side columns.
Compared with two discrete inductors, the embodiment shown in fig. 5 integrates two inductors into one magnetic element, and since the direction of the magnetic flux Φ 1 in the winding post D is opposite to the direction of the magnetic flux Φ 2 in the winding post E, the magnetic fluxes in the core cover a, the core cover B, and the side post C can be reduced, so that even under a design scenario that the magnetic flux density is guaranteed to be small, the size of the magnetic element can be reduced, the loss of the magnetic core can be reduced, and the miniaturization and high efficiency of the magnetic element are facilitated.
FIG. 6 is a perspective view of another embodiment of a magnetic element in accordance with the present invention in which winding W1 is connected in series with winding W2, the current outflow terminal of winding W1 being connected to the current inflow terminal of winding W2. Like the embodiment shown in fig. 5, the direction of the magnetic flux Φ 1 generated on the winding leg D by the current I1 in the winding W1 is downward, the direction of the magnetic flux Φ 2 generated on the winding leg E by the current I1 in the winding W2 is upward, and the direction of the magnetic flux Φ 1 is opposite to the direction of the magnetic flux Φ 2. The winding W1 and the winding W2 are connected in series to form an inductor with larger inductance, and the size and the loss of the magnetic element can be reduced compared with the single inductor with the same parameters.
Fig. 7 is a perspective view of a specific embodiment of parallel connection of the winding W1 and the winding W2, which has the same principle as fig. 5 and is not repeated.
In a specific embodiment of the present invention, the number of windings on each winding post is not limited to one, and a plurality of windings may be provided according to actual requirements, the plurality of windings may be divided into a primary winding and a secondary winding, and the primary winding, the secondary winding and the magnetic core structure may form a transformer, so that the transformer and an inductor or the transformer and the transformer may be integrated into one magnetic element.
FIG. 8 is a perspective view of one embodiment of integrating a transformer and inductor into a magnetic element. The number of the windings on the winding post D is two, and the two windings comprise a winding W1 and a winding W3, the winding post D, the winding W1 and the winding W3 can form a transformer, wherein the winding W1 is a primary winding, and the winding W3 is a secondary winding. The current I1 is the excitation current flowing through the primary winding W1 of the transformer, the current I2 is the current flowing through the winding W2, and the magnetic fluxes Φ 1 and Φ 2 generated on the winding legs by the currents I1 and I2 are opposite in direction, as in the above-described embodiment.
Although the embodiments shown in fig. 5, 6, 7 and 8 only show two winding posts, the embodiments of the present invention are not limited to two winding posts, and more winding posts can be disposed according to actual requirements, and the current flowing end, the series or parallel connection manner and the current direction of the winding around each winding post are reasonably disposed, so that the magnetic flux directions of the adjacent winding posts are opposite to each other, thereby achieving the reduction of the size of the magnetic element and the core loss, and integrating N inductors and M transformers into one magnetic element (N, M ≧ 0).
FIGS. 9-11 are perspective views of an embodiment of a magnetic element including three winding posts. Fig. 9 shows a magnetic element integrated with three inductors, fig. 10 shows a magnetic element integrated with two inductors and fig. 11 shows a magnetic element integrated with two inductors, wherein the windings of two winding posts are connected in series to form one inductor. The principles of fig. 9-11 are the same as those of the magnetic device of the present invention, and will not be described again.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto,
any changes or substitutions that may be easily made by those skilled in the art within the technical scope of the present disclosure are intended to be included within the scope of the present disclosure.
It should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes described in a single embodiment or with reference to a single figure, for the purpose of streamlining the disclosure and aiding in the understanding of various aspects of the invention by those skilled in the art. However, the present invention should not be construed such that the features included in the exemplary embodiments are all the essential technical features of the patent claims.
Those skilled in the art will appreciate that all or part of the flow of the method implementing the above embodiments may be implemented by a computer program, which is stored in a computer readable storage medium, to instruct related hardware. The computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory.
It should be understood that the modules, units, components, and the like included in the device of one embodiment of the present invention may be adaptively changed to be provided in a device different from that of the embodiment. The different modules, units or components comprised by the apparatus of an embodiment may be combined into one module, unit or component or they may be divided into a plurality of sub-modules, sub-units or sub-components.
Claims (17)
1. A magnetic core structure comprises a first magnetic core cover plate, a second magnetic core cover plate, at least two winding posts and a side post, wherein the two winding posts and the side post are positioned between the first magnetic core cover plate and the second magnetic core cover plate, an air gap is arranged on each winding post,
the side column comprises a first side edge part, a second side edge part and a third side edge part connected between the first side edge part and the second side edge part, and the first side edge part, the third side edge part and the second side edge part are sequentially connected to form a structure with three surrounded surfaces and one open surface;
the at least two winding posts are positioned in an area surrounded by three surfaces formed by sequentially connecting the first side edge part, the third side edge part and the second side edge part;
the first side portion, the third side portion and the second side portion are used for supporting the first magnetic core cover plate or the second magnetic core cover plate, and the first side portion and the second side portion support the first magnetic core cover plate or the second magnetic core cover plate from two opposite sides respectively.
2. The magnetic core structure of claim 1, wherein the at least one winding leg has a greater cross-sectional length dimension disposed toward the opening of the leg.
3. The magnetic core structure of claim 2, wherein the end of the winding leg facing the leg opening does not extend beyond a line connecting the end of the first side edge at the leg opening and the end of the second side edge at the leg opening.
4. A magnetic core construction according to claim 1, wherein the side legs are continuous surfaces on the inside and are free of projections.
5. The magnetic core structure of claim 1, wherein the first side portion, the third side portion, and the second side portion each extend linearly or curvedly in a length direction thereof;
the first side edge part and the third side edge part are in arc transition connection, or the first side edge part and the third side edge part are in certain angle connection;
the second side edge part and the third side edge part are in arc transition connection, or the second side edge part and the third side edge part are in certain angle connection.
6. The magnetic core structure of claim 1, wherein the first side portion, the third side portion, and the second side portion each have a curvature along their length, the first side portion and the third side portion being connected in an arcuate transition, the second side portion and the third side portion being connected in an arcuate transition.
7. The magnetic core structure of claim 1, wherein the first side portion, the third side portion, and the second side portion extend linearly in a length direction, the first side portion and the third side portion are connected in an arc transition, the second side portion and the third side portion are connected in an arc transition, and the first side portion and the second side portion are perpendicular to the length direction of the third side portion in the length direction.
8. The magnetic core structure of claim 7, wherein the first side edge portion and the second side edge portion are equal or unequal in length.
9. The core structure of any of claims 1-8, wherein two winding legs and one side leg are disposed on the second core cover, and wherein the ends of the two winding legs near the first core cover are provided with air gaps, and wherein the second core cover, the two winding legs and the one side leg form an E-core, the first core cover forms an I-core, and the E-core and the I-core form an EI-core structure.
10. The core structure according to any of claims 1-8, wherein the two winding legs and the one side leg between the first core cover and the second core cover are divided into two parts along a plane parallel to the core cover, the two parts being disposed on the first core cover and the second core cover, respectively; an air gap is arranged between the two winding post parts on the first magnetic core cover plate and the two winding post parts on the second magnetic core cover plate; two wrapping posts and side columns on the first magnetic core cover plate form an E-shaped magnetic core, two wrapping posts and side columns on the second magnetic core cover plate form another E-shaped magnetic core, and the two E-shaped magnetic cores form an EE-shaped magnetic core structure.
11. A magnetic component comprising a core structure according to any of claims 1-8, wherein the at least two legs are provided with windings and the magnetic fluxes on adjacent legs are in opposite directions.
12. The magnetic element of claim 11 wherein the winding is fed or discharged through the opening of the side post.
13. The magnetic element of claim 11 wherein the direction of current flow through the windings on adjacent legs is set so that the direction of magnetic flux on adjacent legs is opposite.
14. The magnetic component of claim 11, wherein the winding direction of the windings on adjacent winding legs is configured such that the magnetic flux direction on adjacent winding legs is opposite.
15. The magnetic element of claim 11 wherein the windings on the at least two winding legs are used individually, in series, or in parallel.
16. The magnetic element of claim 11 wherein at least two windings are provided on at least one of the winding legs.
17. The magnetic element of claim 11 wherein, of the at least two winding posts,
two windings are arranged on at least one winding post, wherein one winding is used as a primary winding, and the other winding is used as a secondary winding to form a transformer;
at least one other winding leg is provided with a winding to form an inductor.
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