CN217544320U - Inductance device, converter circuit, printed circuit board, electronic equipment and power system - Google Patents
Inductance device, converter circuit, printed circuit board, electronic equipment and power system Download PDFInfo
- Publication number
- CN217544320U CN217544320U CN202220328109.8U CN202220328109U CN217544320U CN 217544320 U CN217544320 U CN 217544320U CN 202220328109 U CN202220328109 U CN 202220328109U CN 217544320 U CN217544320 U CN 217544320U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- bottom plate
- cover plate
- columns
- column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Coils Or Transformers For Communication (AREA)
Abstract
The application provides an inductance device, a converter circuit, a printed circuit board, electronic equipment and an electric power system, and relates to the technical field of electronic devices. Wherein, inductance device includes: the magnetic core assembly comprises a bottom plate, at least two first magnetic columns, at least one second magnetic column and a cover plate; three main magnetic columns and three auxiliary magnetic columns in the magnetic core assembly are respectively arranged between the bottom plate and the cover plate. The main magnetic columns and the auxiliary magnetic columns are arranged in a staggered mode, and the distance between every two adjacent main magnetic columns is the same. After the inductor on the main magnetic pole is electrified, the symmetrical staggered high-frequency current components in the current can generate multi-phase symmetrical staggered high-frequency magnetic flux which can be mutually offset among the main magnetic poles; the low-frequency current component in the current can generate low-frequency magnetic flux which is mutually counteracted among the auxiliary magnetic columns, and the power loss of the whole circuit is reduced.
Description
Technical Field
The present invention relates to the field of electronic device technologies, and in particular, to an inductance device, a converter circuit, a printed circuit board, an electronic apparatus, and a power system.
Background
The power factor is a relationship between the effective power and the total power consumption (apparent power), i.e., a ratio of the effective power divided by the total power consumption, and is one of important indicators for measuring performance of power consuming devices such as components and electronic devices. Therefore, the degree of effective utilization of the power consumption equipment can be determined according to the value of the power factor, and the higher the value of the power factor is, the higher the power utilization rate of the power consumption equipment is, and the better the performance is.
In a conventional Power Factor Correction (PFC) converter, an input current and an input voltage of a PFC inductor input to the PFC converter have a phase difference, so that the PFC inductor generates an asymmetric component to cause an exchange power loss of the PFC converter, thereby reducing a power factor of the entire PFC converter.
Disclosure of Invention
In order to solve the above problem, embodiments of the present application provide a PFC inductor apparatus, the apparatus includes at least two inductor windings and a magnetic core assembly, the magnetic core assembly includes at least two main magnetic pillars and at least one sub magnetic pillar. Each inductor winding is wound on the main magnetic pole to form an inductor. The main magnetic columns and the auxiliary magnetic columns are arranged in a staggered mode. And the distance between the adjacent main magnetic columns is the same as that between the adjacent two main magnetic columns, and the distance between the adjacent two auxiliary magnetic columns is the same as that between the adjacent two auxiliary magnetic columns. After each inductance winding is electrified, the symmetrical staggered high-frequency current components in the current can generate multi-phase symmetrical staggered high-frequency magnetic flux in the magnetic core, and the low-frequency current components in the current can generate low-frequency magnetic flux in the magnetic core. The symmetrically staggered high-frequency magnetic fluxes can be mutually offset among the main magnetic poles, and the low-frequency magnetic fluxes can be mutually offset among the auxiliary magnetic poles, so that the power loss of the whole circuit is reduced. For each main magnetic pole, the sum of the distances between the main magnetic pole and each auxiliary magnetic pole is the same, and the magnetic flux generated by the inductance winding on each main magnetic pole is distributed on the magnetic core in a balanced manner.
Therefore, the following technical scheme is adopted in the embodiment of the application:
in a first aspect, the present application provides an inductive device, comprising: the magnetic core assembly comprises a bottom plate, at least two first magnetic columns, at least one second magnetic column and a cover plate; each first magnetic column is arranged between the bottom plate and the cover plate, and two ends of each first magnetic column are respectively fixed on the bottom plate and the cover plate; each second magnetic column is arranged between the bottom plate and the cover plate, and two ends of each second magnetic column are respectively fixed on the bottom plate and the cover plate; the at least two inductance windings are respectively nested on the at least two first magnetic columns; each first magnetic column of the at least two first magnetic columns and each second magnetic column of the at least one second magnetic column are arranged in a staggered mode, and the distance between every two adjacent first magnetic columns is the same.
In this embodiment, three primary and three secondary magnetic posts in the magnetic core assembly are disposed between the base plate and the cover plate, respectively. The main magnetic columns and the auxiliary magnetic columns are arranged in a staggered mode, and the distance between every two adjacent main magnetic columns is the same. After the inductor on the main magnetic pole is electrified, the symmetrical staggered high-frequency current components in the current can generate multi-phase symmetrical staggered high-frequency magnetic flux which can be mutually offset among the main magnetic poles; low-frequency current components in the current can generate low-frequency magnetic flux which is mutually counteracted among the auxiliary magnetic columns, and the power loss of the whole circuit is reduced.
In one embodiment, the distance between two adjacent second magnetic columns is the same, and the distance between the first magnetic column and the second magnetic column is the same.
In this embodiment, since each of the secondary magnetic poles forms a magnetic circuit with each of the primary magnetic poles through the bottom plate and the cover plate, and the distance between the adjacent primary magnetic poles is the same as that between the adjacent secondary magnetic poles, the distance between the adjacent secondary magnetic poles is the same as that between the adjacent secondary magnetic poles. The low-frequency magnetic flux can be mutually offset among the auxiliary magnetic columns, so that the power loss of a circuit connected with the PFC inductance device is further reduced.
In one embodiment, the bottom plate and the cover plate have the same shape, and the bottom plate and the cover plate have the same size.
In this embodiment, the bottom plate and the cover plate may be identical in shape, allowing the core assembly to be highly symmetrical. When the inductor nested on the main magnetic column is electrified, the magnetic flux distribution in the magnetic core assembly is relatively balanced.
In one embodiment, the shape of the first surface of the bottom plate is a regular N-polygon, the first surface is a surface of the bottom plate contacting the first magnetic pillar and the second magnetic pillar, N is a positive integer greater than or equal to 3, and N is related to the total number of the first magnetic pillar and the second magnetic pillar; the shape of the second surface of the cover plate is the regular N-polygon, and the second surface is the surface of the cover plate contacting with the first magnetic column and the second magnetic column.
In this embodiment, by designing the floor and the cover plate to be a regular N-polygon, and N is related to the total number of the main magnetic pillars and the auxiliary magnetic pillars, the main magnetic pillars and the auxiliary magnetic pillars can be respectively fixed at the edge of the regular N-polygon, so that the environment of each main magnetic pillar on the floor and the cover plate is the same, the environment of each auxiliary magnetic pillar on the floor and the cover plate is the same, and the magnetic core assembly is highly symmetrical. When the inductor nested on the main magnetic column is electrified, the magnetic flux distribution in the magnetic core assembly is relatively balanced.
In one embodiment, one end of each first magnetic column, which is connected with the bottom plate, is tangent to the edge of the periphery of the bottom plate; and one end of each first magnetic column, which is connected with the cover plate, is tangent to the edge of the periphery of the cover plate.
In this embodiment, the two ends of the main magnetic pillar are fixed on the bottom plate and the cover plate respectively and tangent to the edges of the bottom plate and the cover plate respectively. The wire is wound on the main magnetic column to form the inductor, and the inductor can partially protrude out of the edges of the bottom plate and the cover plate, so that PINs (PIN) at two ends of the inductor can be conveniently and electrically connected with an external circuit.
In one embodiment, the cross-sectional area of the second magnetic stud is 1/3 to 2/3 of the cross-sectional area of the first magnetic stud.
In the embodiment, the cross-sectional area of the auxiliary magnetic pole is generally smaller than that of the main magnetic pole and is about 1/3 to 2/3 of that of the main magnetic pole, so that the phenomenon that the cross-sectional area of the auxiliary magnetic pole is too large to cause the overlarge volume of the inductance device is avoided. The cross-sectional area of the auxiliary magnetic pole can not be too small, so that the auxiliary magnetic pole is prevented from being magnetically saturated, and the linearity of the inductor and the circuit operation are further influenced.
In one embodiment, the method further comprises: the coil winding is nested on the magnetic ring, and the magnetic ring penetrates through pins of the at least two inductance windings to form the current transformer.
In this embodiment, a current transformer is constructed by nesting a magnetic ring on the legs of the inductor winding that forms the inductor, and winding a coil winding around the magnetic ring. The inductance device does not need to be additionally connected with an independent current transformer in series, and the occupied area of the PCB is reduced.
In a second aspect, the present application provides an inductive device comprising: the magnetic core assembly comprises a bottom plate, three first magnetic columns, three second magnetic columns and a cover plate; each first magnetic column is arranged between the bottom plate and the cover plate, and two ends of each first magnetic column are respectively fixed on the bottom plate and the cover plate; each second magnetic column is arranged between the bottom plate and the cover plate, and two ends of each second magnetic column are respectively fixed on the bottom plate and the cover plate; the three inductance windings are respectively nested on the three first magnetic columns; each first magnetic column in the at least two first magnetic columns and each second magnetic column in the at least one second magnetic column are arranged in a staggered mode, and the distance between every two adjacent first magnetic columns is the same; the bottom plate with the apron size is the same, the bottom plate with the shape of apron is the same, is regular hexagon.
In a third aspect, the present application provides a converter circuit comprising: at least one inductive device as variously implementable in the first aspect.
In a fourth aspect, the present application provides a printed circuit board comprising: at least one inductive device as each possible implementation of the first aspect and an inductive device as each possible implementation of the second aspect; each framework structure is provided with a through hole for the inductor to pass through and is fixed in the through hole in the framework structure; and the printed circuit board is provided with at least one through hole for the inductance device and/or the skeleton structure to pass through and be fixed in the through hole on the printed circuit board.
In a fifth aspect, the present application provides an electronic device, comprising: at least one printed circuit board as variously implementable in the fourth aspect.
In a sixth aspect, the present application provides a power system comprising: at least one printed circuit board as each possible implementation of the fourth aspect.
Drawings
The drawings that accompany the detailed description can be briefly described as follows.
Fig. 1 is a schematic diagram of a circuit structure of a DC-DC converter provided in the prior art;
fig. 2 is a schematic diagram of a magnetic core structure of a three-phase PFC inductor apparatus provided in the prior art;
fig. 3 is a schematic diagram illustrating a thermal simulation of a magnetic core of a PFC inductor apparatus provided in the prior art;
FIG. 4 is a schematic view of a magnetic core assembly provided in an embodiment of the present application, with a cover plate removed;
FIG. 5 is a schematic diagram illustrating a top view of a magnetic core assembly provided in an embodiment of the present application;
FIG. 6 is a schematic diagram of a magnetic core assembly provided in an embodiment of the present application, wherein an inductive winding is wound around a main leg of the magnetic core assembly;
fig. 7 is a schematic structural diagram of a magnetic ring wound with a multi-turn coil winding and disposed on a three-phase PFC inductor device according to an embodiment of the present disclosure;
FIG. 8 is a schematic structural diagram of various components in a PCB structure provided in an embodiment of the present application;
FIG. 9 is a schematic side view of a PCB structure provided in an embodiment of the present application;
FIG. 10 is a schematic diagram of various components of a PCB structure provided in an embodiment of the present application;
FIG. 11 is a schematic side view of a PCB structure provided in an embodiment of the present application;
FIG. 12 is a schematic diagram of various components of a PCB structure provided in an embodiment of the present application;
FIG. 13 is a schematic diagram of a side view of a PCB structure provided in an embodiment of the present application;
FIG. 14 is a cross-sectional view of the PCB structure shown in FIGS. 8-9 provided in an embodiment of the present application;
FIG. 15 is a cross-sectional view of the PCB structure shown in FIGS. 10-11 provided in an embodiment of the present application;
fig. 16 is a schematic cross-sectional view of the PCB structure shown in fig. 12-13 provided in the embodiments of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
In the description of the present application, the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have particular orientations, be constructed in particular orientations, and be operated, and thus, are not to be construed as limiting the present application.
In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, a detachable connection, an interference connection, or an integral connection; the specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The PFC technology has become mature through years of development and application debugging, and is also being applied to circuit design and new converter product development. One of them is a direct current-direct current (DC-DC) converter composed of active circuits controlled based on PFC technology. As shown in FIG. 1, in the circuit structure of the DC-DC converter, three inductors (L) 1 -L 3 ) Are connected in a staggered parallel mode in the bridge rectifier. When three inductors (L) 1 -L 3 ) When current is introduced, the high-frequency switch of the semiconductor switch bridge arm on the branch where each inductor is located is symmetrically phase-shifted at all times, and the high-frequency current component on each inductor is also symmetrically phase-shifted, so that three inductors (L) flow into 1 -L 3 ) The input current in (1) contains a high-frequency component of the switching frequency. As the bridge arms on the branch where each inductor is positioned share one power grid alternating current port and one power frequency voltage modulation wave, the power frequency current components of the bridge arms are the same without the effect of symmetrical phase shift, and therefore three inductors (L) flow in 1 -L 3 ) The input current of (1) also contains a power frequency component.
To achieve a more compact volume and lower losses, three inductors (L) may be used 1 -L 3 ) Integrated on one magnetic core. Illustratively, as shown in FIG. 2, three inductors (L) 1 -L 3 ) Respectively nested on EE type magnetic integrated magnetic core. Three inductors (L) 1 - L 3 ) After the current is introduced, the high-frequency current components symmetrically staggered in the current can generate multi-phase symmetrically staggered high-frequency magnetic fluxes in the magnetic core, and the low-frequency current components in the current can generate low-frequency magnetic fluxes in the magnetic core. Wherein the symmetrical high frequency magnetic flux can be generally in the inductance (L) 1 -L 3 ) The common magnetic columns in (1) cancel each other out, but the low-frequency magnetic flux cannot be in the inductance (L) 1 -L 3 ) In the common magnetic poleFor cancellation, other core paths are needed for circulation, such as cancellation by secondary magnetic poles on both sides.
However, for three-phase interleaved PFC inductors (L) 1 -L 3 ) In other words, when the low-frequency magnetic flux is large, the auxiliary magnetic pole is easily subjected to magnetic saturation, and the linearity of the inductor and the circuit operation are further influenced. In addition, the main magnetic pole and the auxiliary magnetic pole in the magnetic core are asymmetric, which causes different magnetic path lengths of the magnetic fluxes generated by the three inductors, and causes unbalanced magnetic flux distribution on the magnetic core, so that local heat generation on the magnetic core is relatively serious, as shown in the heat simulation diagram of the magnetic core of the PFC inductor shown in fig. 3. Hot spots (dark parts in the figure) can occur on the EE type magnetic integrated magnetic core, so that the magnetic core is easy to burn out, the stability of the circuit is reduced, and the power loss of the whole circuit is serious.
In order to solve the above problem, in the embodiment of the present application, a PFC inductor apparatus is designed, where the apparatus includes at least two inductor windings and a magnetic core assembly, and the magnetic core assembly includes at least two main magnetic pillars and at least one auxiliary magnetic pillar. Wherein, each inductance winding is wound on the main magnetic pole to form the inductance. The main magnetic columns and the auxiliary magnetic columns are arranged in a staggered mode. And the distance between the adjacent main magnetic poles is the same as that between the adjacent auxiliary magnetic poles, the distance between the adjacent two main magnetic poles is the same as that between the adjacent two auxiliary magnetic poles. After each inductance winding is electrified, the high-frequency current components symmetrically staggered in the current can generate multi-phase symmetrically staggered high-frequency magnetic flux in the magnetic core, and the low-frequency current components in the current can generate low-frequency magnetic flux in the magnetic core. The symmetrically staggered high-frequency magnetic fluxes can be mutually offset among the main magnetic poles, and the low-frequency magnetic fluxes can be mutually offset among the auxiliary magnetic poles, so that the power loss of the whole circuit is reduced. For each main magnetic pole, the sum of the distances between the main magnetic pole and each auxiliary magnetic pole is the same, and the magnetic flux generated by the inductance winding on each main magnetic pole is distributed on the magnetic core in a balanced manner.
The inductance winding can be a multi-turn coil formed by winding an enameled wire on the magnetic pole. The inductance winding can also be formed by attaching copper sheets to the magnetic columns and then dividing the copper sheets into spiral structures by using insulating materials. And others by other means, the application is not limited thereto.
The following takes a three-phase PFC inductor device as an example to describe a specific implementation process of the scheme of the present application. The three-phase PFC inductance device comprises three inductance windings and a magnetic core assembly comprising three main magnetic columns.
Fig. 4 and 5 are schematic structural diagrams of a magnetic core assembly provided in an embodiment of the present application. As shown, the magnetic core assembly 400 includes a base plate 410, three primary magnetic posts 420, three secondary magnetic posts 430, and a cover plate 440. Each of the main magnetic pillars 420 is disposed between the base plate 410 and the cover plate 440, and each of the sub magnetic pillars 430 is also disposed between the base plate 410 and the cover plate 440. The main magnetic pillars 420 and the auxiliary magnetic pillars 430 are arranged in a staggered manner. The distances between the adjacent main magnetic poles 420 and the adjacent auxiliary magnetic poles 430 are the same, the distances between the adjacent two main magnetic poles 420 are the same, and the distances between the adjacent two auxiliary magnetic poles 430 are the same.
The bottom plate 410 and the cover plate 440 are respectively disposed at two ends of the main magnetic pillar 420 and the auxiliary magnetic pillar 430, and are used for fixing the main magnetic pillar 420 and the auxiliary magnetic pillar 430, and enabling each main magnetic pillar 420 and each auxiliary magnetic pillar 430 to be disposed between the bottom plate 410 and the cover plate 440 according to a set positional relationship. The bottom plate 410 and the cover plate 440 may be identical in shape such that the magnetic core assembly 400 is highly symmetrical. When the inductor winding nested on the main pole 420 is energized with current, the magnetic flux distribution in the magnetic core assembly 400 is relatively uniform. The cross-sectional shapes of the bottom plate 410 and the cover plate 440 may be regular hexagons as shown in fig. 4-5, and other shapes such as square, triangle, dodecagon, etc., which are not limited herein. Alternatively, the shapes of the bottom plate 410 and the cover plate 440 may be different, such as the bottom plate 410 is designed to have a different shape from the cover plate 440 according to a space in which a Printed Circuit Board (PCB) can be mounted, and others.
If the bottom plate 410 and the cover plate 440 are both in the shape of a regular hexagon, three main magnetic pillars 420 and three sub magnetic pillars 430 may be respectively disposed on each side of the regular hexagon. The main magnetic pillar 420 and the auxiliary magnetic pillar 430 are respectively positioned at the middle position of each side of the regular hexagon. At this time, the distance between the main pole 420 and the sub-pole 430 is the same, and the environment on the base plate 410 and the cover plate 440 is the same. After the current is applied to the inductor winding nested on the main magnetic pole 420, the magnetic flux distribution in the magnetic core assembly 400 is relatively balanced, thereby avoiding the problem of hot spots caused by unbalanced magnetic flux distribution.
The main magnetic post 420 provides support for the inductor winding, allowing the inductor winding to be wound around the main magnetic post 420. The main magnetic pole 420 can also absorb magnetic flux, so that the magnetic flux generated by the inductance winding is bound in the main magnetic pole 420, and the interference of the magnetic flux generated by the inductance winding on external electronic devices is avoided. In core assembly 400, if a current is applied to the inductive windings on each main leg 420, the symmetrically interleaved high frequency current components in the current will generate a multi-phase symmetrically interleaved high frequency magnetic flux in each main leg 420. Because the distances between the main magnetic columns 420 are the same, the symmetrical staggered high-frequency magnetic fluxes can be mutually offset between the main magnetic columns 420, and the power loss of a circuit connected with the PFC inductance device is reduced.
In the magnetic core assembly 400, the main magnetic pillars 420 have the same shape and size, and the shape may be a cylinder as shown in fig. 4 to 5, or other shapes, such as an oval cylinder, a rectangular parallelepiped, and the like, which is not limited herein. Preferably, the main pole 420 is shaped as a cylinder.
If the main magnetic pole 420 is a cylinder, two ends of the main magnetic pole 420 are respectively fixed on the bottom plate 410 and the cover plate 440 and are respectively tangent to the edges of the bottom plate 410 and the cover plate 440. As shown in fig. 6, the inductor winding formed on the main pole 420 partially protrudes from the edges of the bottom plate 410 and the cover plate 440, so that the PINs (PINs) at the two ends of the inductor winding can be electrically connected to the external circuit. Optionally, the main magnetic pole 420 may also be separated from the edges of the bottom plate 410 and the cover plate 440, so that the number of turns of the coil of the inductive winding may be increased, and a part of the coil in the inductive winding protrudes out of the edges of the bottom plate 410 and the cover plate 440, which may also achieve the above-mentioned effects; and in other ways, the present application is not limited thereto.
The sub magnetic pillars 430 are disposed between the base plate 410 and the cover plate 440, and form a magnetic circuit between each of the main magnetic pillars 420 and the base plate 410 and the cover plate 440. When current is input to the inductive winding on each main leg 420, a low frequency current component in the current will generate a low frequency magnetic flux in each main leg 420. Since each of the sub magnetic poles 430 forms a magnetic loop with each of the main magnetic poles 420 through the bottom plate 410 and the cover plate 440, and the distances between the adjacent main magnetic poles are the same, the distances between the adjacent sub magnetic poles are the same. The low-frequency magnetic flux can be mutually offset among the auxiliary magnetic columns, so that the power loss of a circuit connected with the PFC inductance device is further reduced.
In the magnetic core assembly 400, the secondary magnetic pillars 430 have the same shape and size, and may have a triangular pillar-like shape as shown in fig. 4-5, or other shapes, such as a triangular pillar, a rectangular parallelepiped, etc., which is not limited herein.
As shown in fig. 4-5, each main magnetic pillar 420 is cylindrical in shape. In order to ensure that the distances between the auxiliary magnetic pole 430 and the adjacent main magnetic pole 420 are the same, the edge of the auxiliary magnetic pole 430 close to the main magnetic pole 420 is designed into a circular arc shape, so that the distances between the side of the auxiliary magnetic pole 430 close to the main magnetic pole 420 and the side of the main magnetic pole 420 close to the auxiliary magnetic pole 430 are equal everywhere, the distance between the auxiliary magnetic pole 430 and the adjacent main magnetic pole 420 is more accurate, and the power loss of a circuit connected with the PFC inductance device is reduced to the maximum extent.
The cross-sectional area of the secondary magnetic pillar 430 is generally smaller than that of the main magnetic pillar 420, so that the secondary magnetic pillar 430 is prevented from occupying more space in the PFC inductance device, and the volume of the PFC inductance device is prevented from being too large. The cross-sectional area of the auxiliary magnetic column 430 cannot be too small, so that the auxiliary magnetic column 430 is prevented from being magnetically saturated, and the linearity of the inductor and the circuit operation are further influenced. Preferably, the cross-sectional area of the sub pole 430 is generally 1/3 to 2/3 of the cross-sectional area of the main pole 420.
In the three-phase PFC inductance device protected by the application, three main magnetic columns and three auxiliary magnetic columns in the magnetic core assembly are respectively arranged between the bottom plate and the cover plate. The main magnetic columns and the auxiliary magnetic columns are arranged in a staggered mode, the distance between every two adjacent main magnetic columns is the same as that between every two adjacent auxiliary magnetic columns, the distance between every two adjacent main magnetic columns is the same, and the distance between every two adjacent auxiliary magnetic columns is the same. When the inductive winding on the main magnetic pole is electrified, the symmetrical staggered high-frequency current components in the current can generate multi-phase symmetrical staggered high-frequency magnetic flux which can be mutually offset among the main magnetic poles; the low-frequency current component in the current can generate low-frequency magnetic flux which is mutually counteracted among the auxiliary magnetic columns, and the power loss of the whole circuit is reduced. And after the inductance windings on the main magnetic poles generate magnetic flux, the magnetic flux is distributed on the magnetic cores in a balanced manner.
The three-phase PFC inductor device is taken as an example in the application, and it is conceivable that, based on the above technical solution, the application to a two-phase PFC inductor device, a four-phase PFC inductor device, and the like may be expanded, and the application may also be expanded to a transformer, other types of inductor devices, and the like, which all belong to the protection scope of the application.
It should be noted that, in the description of the magnetic core assembly 400, the magnetic core assembly 400 is described by being divided into a bottom plate 410, three main magnetic columns 420, three sub magnetic columns 430, and a cover plate 440. Since the magnetic core assembly 400 is generally formed by pressing materials such as ferroferric oxide powder and nickel-zinc oxide, the magnetic core assembly 400 is generally of an integral structure, and the above embodiments are merely for convenience of description. Of course, the magnetic core assembly 400 may be formed by splicing various components, and the application is not limited herein.
As shown in fig. 7, the three-phase PFC inductor apparatus further includes a magnetic ring 710 having a plurality of turns of coil windings wound on an outer side thereof. The magnetic ring 710 is disposed on the bottom plate 410 or the cover plate 440 and nested on the PIN of each inductive winding. In the present application, the magnetic ring 710 may be used as a magnetic core, the PIN of each inductive winding is used as a primary winding (or a secondary winding), and the coil winding wound around the outer side of the magnetic ring 710 is used as a secondary winding (or a primary winding), so as to form a current transformer. The three-phase PFC inductance device does not need to be additionally connected with an independent current transformer in series, and the occupied area of a PCB can be reduced.
The current transformer is a measuring instrument which converts a large current on a primary side into a small current on a secondary side according to the electromagnetic induction principle. A current transformer generally consists of a closed iron core and two windings. The primary winding has a small number of turns and is connected in series with the line of the current to be measured. The secondary winding has more turns and is connected in series in the measuring instrument and the protection loop. In the current transformer, the power consumption of the whole circuit can be reduced by multiplexing the PIN of each inductive winding.
The embodiment of the application provides a converter circuit which comprises an N-phase PFC inductance device. The N-phase PFC inductor device may be a three-phase PFC inductor device as described in fig. 4 to 7 and the corresponding protection schemes, and other PFC inductor devices are developed according to the three-phase PFC inductor device. Since the converter circuit comprises the three-phase PFC inductive device, the converter circuit has all or at least part of the advantages of the three-phase PFC inductive device.
Embodiments of the present application provide a PCB comprising at least one of the above-mentioned converter circuits, the converter circuit comprising an N-phase PFC inductive device. The N-phase PFC inductor device may be a three-phase PFC inductor device as described in fig. 4 to 7 and the corresponding protection schemes, and other PFC inductor devices are developed according to the three-phase PFC inductor device. Since the PCB comprises the three-phase PFC inductive device, the PCB has all or at least part of the advantages of the three-phase PFC inductive device.
The PFC inductor device is fixed to the PCB and needs to satisfy the principle of minimum size and minimum volume of the PCB. Therefore, several different framework structures are designed, the PFC inductance device is fixed on the PCB, and the size and the volume of the PCB are smaller.
As shown in fig. 8, a through hole is formed in the PCB 830, and the through hole may be shaped outside the PFC inductor 810 or outside the skeleton structure 820. The skeleton structure 820 is provided with a through hole, and the shape of the through hole is the shape of the outer side of the PFC inductor device 810. During assembly, PFC inductor 810 may be inserted and secured in a through hole in skeletal structure 820. If the shape of the through hole on PCB 830 is the shape of the outside of PFC inductor 810, PFC inductor 810 may also be embedded and fixed in the through hole on PCB 830. If the through-hole of the PCB 830 has a shape outside the skeleton structure 820, the skeleton structure 820 may be inserted and fixed into the through-hole of the PCB 830. The PFC inductor 810 respectively passes through the skeleton structure 820 and the PCB 830, so that the thickness of the PCB structure in the normal direction can be reduced, and the size and volume of the PCB structure can be designed to be relatively small. The final assembled PCB structure is shown in fig. 9.
As shown in fig. 10, the bobbin structure 1020 includes a plurality of fixing structures (not limited to the three shown in fig. 10) respectively fixed on the side edges of the magnetic core assembly in the PFC inductor 1010. PCB 1030 has a through hole through which PFC inductor 1010 may pass. Each securing structure is at least partially disposed on an upper surface of PCB 1030 to limit the passage of PFC inductor 1010 through a through hole in PCB 1030. The skeleton structure 1020 and the PCB 1030 are respectively located on the side edges of the PFC inductor 1010, so that the thickness of the PCB structure in the normal direction can be reduced, and the size and volume of the PCB structure can be designed to be relatively small. The final assembled PCB structure is shown in fig. 11.
As shown in fig. 12, backbone structure 1220 includes a plurality of fastening structures (not limited to the three shown in fig. 12) that are respectively fastened to the sides of the core assembly in PFC inductor assembly 1210. PCB 1230 is provided with a through hole through which PFC inductor 1210 may pass. Each fastening structure is at least partially disposed on the top surface of PCB 1230 to limit the PFC inductor 1210 from passing through a via in PCB 1230. The skeleton structure 1220 and the PCB 1230 are respectively located on the side edges of the PFC inductor 1210, which can reduce the thickness of the PCB structure in the normal direction, thereby realizing a smaller size and volume design of the PCB structure. The final assembled PCB structure is shown in fig. 13.
Compared with the solutions of fig. 10 to fig. 11, in the structure designed in fig. 12 to fig. 13, each fixing structure in the skeleton structure 1220 does not pass through a through hole on the PCB 1230, and the shape of the through hole on the PCB 1230 only needs to be the same as the shape of the PFC inductor 1210, so as to design the size and volume of the PCB 1230 to be smaller.
A plurality of recesses may be provided in the core assembly of the PFC inductor apparatus. The recesses may be distributed on the side of the cover plate in the core assembly or may be provided on the side of the base plate in the core assembly. A plurality of protrusions may be provided on the inner side edge of the through hole in the skeleton structure. The distribution of the protrusions is located at a position corresponding to the position of the plurality of recesses on the core assembly. After the PFC inductance device passes through the through hole in the skeleton structure, the grooves on the PFC inductance device are embedded with the bulges on the through hole in the skeleton structure, so that the PFC inductance device is fixed in the through hole in the skeleton structure. Alternatively, a plurality of grooves on the PFC inductor device may be replaced with a plurality of protrusions, and a plurality of protrusions on the through hole in the skeleton structure may be replaced with a plurality of grooves. Each protrusion on the PFC inductance device is embedded with each groove on the through hole in the framework structure, and the PFC inductance device can also be fixed in the through hole in the framework structure. And other means of attachment, the application is not limited thereto.
For example, in the PCB structure shown in fig. 8-9, a plurality of protrusions may be provided on an inside edge of the through hole in the skeleton structure 820. During the assembly process, when the PFC inductor device 810 passes through the through hole of the skeleton structure 820, the grooves of the PFC inductor device 810 are embedded with the protrusions of the through hole of the skeleton structure 820, so as to fix the PFC inductor device 810 in the through hole of the skeleton structure 810. The final assembled PCB structure is shown in fig. 14.
For example, in the PCB structure shown in fig. 10-11, a plurality of protrusions may be provided on the inside edge of each of the fixing structures in the skeleton structure 1020. In the assembling process, when each fixing structure is fixed on the PFC inductor 1010, each groove on the PFC inductor 1010 is embedded with the protrusion on each fixing structure, so that each fixing structure is fixed on the PFC inductor 1010. The final assembled PCB structure is shown in fig. 15.
For example, in the PCB structure shown in fig. 12-13, a plurality of protrusions may be provided on the inside edge of each of the securing structures in the backbone structure 1220. In the assembling process, when each fixing structure is fixed on the PFC inductor device 1210, each groove on the PFC inductor device 1210 is embedded with the protrusion on each fixing structure, so that each fixing structure is fixed on the PFC inductor device 1210. The final assembled PCB structure is shown in fig. 16.
An embodiment of the application provides an electronic device, which comprises at least one PCB. The PCB may be the above mentioned PCB as shown in fig. 8-16 and the corresponding protection scheme, the PCB includes the three-phase PFC inductor device as shown in fig. 4-7 and the corresponding protection scheme, and other PFC inductor devices are developed according to the three-phase PFC inductor device. Since the PCB comprises the three-phase PFC inductor means, the electronic device has all or at least part of the advantages of the three-phase PFC inductor means. The electronic device may be an electric vehicle, a charging converter, a battery module, or the like.
An embodiment of the present application provides a power system including at least one PCB. The PCB may be the above mentioned PCB as shown in fig. 8-16 and the corresponding protection scheme, the PCB includes the three-phase PFC inductor device as shown in fig. 4-7 and the corresponding protection scheme, and other PFC inductor devices are developed according to the three-phase PFC inductor device. Since the PCB comprises the three-phase PFC inductive device, the power system has all or at least part of the advantages of the three-phase PFC inductive device. The power system can be a new energy power generation system, a rail transit system, an electric drive system of an electric automobile and the like.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
Finally, the description is as follows: the above embodiments are merely used to illustrate the technical solutions of the present application, and although the present application is described in detail with reference to the foregoing embodiments, a person having ordinary skill in the art should understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (12)
1. An inductive device, comprising: a magnetic core assembly and at least two inductive windings,
the magnetic core assembly comprises a bottom plate, at least two first magnetic columns, at least one second magnetic column and a cover plate; each first magnetic column is arranged between the bottom plate and the cover plate, and two ends of each first magnetic column are respectively fixed on the bottom plate and the cover plate; each second magnetic column is arranged between the bottom plate and the cover plate, and two ends of each second magnetic column are respectively fixed on the bottom plate and the cover plate; the at least two inductance windings are respectively nested on the at least two first magnetic columns;
each first magnetic column of the at least two first magnetic columns and each second magnetic column of the at least one second magnetic column are arranged in a staggered mode, and the distance between every two adjacent first magnetic columns is the same.
2. The inductance device according to claim 1, wherein the distance between two adjacent second magnetic pillars is the same, and the distance between the first magnetic pillar and the second magnetic pillar is the same.
3. The inductive device of claim 1, wherein the bottom plate and the cover plate are the same shape, and the bottom plate and the cover plate are the same size.
4. The inductance device according to any one of claims 1 to 3, wherein the first surface of said bottom plate is shaped as a positive N-sided polygon, said first surface being a surface of said bottom plate contacting said first magnetic pillar and said second magnetic pillar, N being a positive integer equal to or greater than 3, N being related to the total number of said first magnetic pillar and said second magnetic pillar;
the shape of the second surface of the cover plate is the regular N-polygon, and the second surface is the surface of the cover plate contacted with the first magnetic column and the second magnetic column.
5. The inductance device according to any one of claims 1 to 3, wherein one end of each first magnetic pillar connected to said bottom plate is tangent to the peripheral edge of said bottom plate; one end of each first magnetic column, which is connected with the cover plate, is tangent to the edge of the periphery of the cover plate.
6. An inductive device according to any of claims 1-3, characterized in that the cross-sectional area of the second magnetic stud is 1/3 to 2/3 of the cross-sectional area of the first magnetic stud.
7. An inductive device according to any one of claims 1 to 3, further comprising: a coil winding and a magnetic ring are arranged on the magnetic ring,
the coil windings are nested on the magnetic ring, and the magnetic ring penetrates through pins of the at least two inductor windings to form the current transformer.
8. An inductive device, comprising: a magnetic core assembly (400) and three inductive windings,
the magnetic core assembly comprises a bottom plate (410), three first magnetic columns (420), three second magnetic columns (430) and a cover plate (440); each first magnetic column is arranged between the bottom plate and the cover plate, and two ends of each first magnetic column are respectively fixed on the bottom plate and the cover plate; each second magnetic column is arranged between the bottom plate and the cover plate, and two ends of each second magnetic column are respectively fixed on the bottom plate and the cover plate; the three inductance windings are respectively nested on the three first magnetic columns;
each first magnetic column in the at least two first magnetic columns and each second magnetic column in the at least one second magnetic column are arranged in a staggered mode, and the distance between every two adjacent first magnetic columns is the same; the bottom plate with the apron size is the same, the bottom plate with the shape of apron is the same, is regular hexagon.
9. A converter circuit, comprising: at least one inductive device as claimed in claims 1 to 8.
10. A printed circuit board, comprising:
at least one inductive device as recited in claims 1-8;
each framework structure is provided with a through hole for the inductor to pass through and is fixed in the through hole in the framework structure;
and the printed circuit board is provided with at least one through hole for the inductive device and/or the skeleton structure to pass through and be fixed in the through hole on the printed circuit board.
11. An electronic device, comprising: at least one printed circuit board according to claim 10.
12. An electrical power system, comprising: at least one printed circuit board according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220328109.8U CN217544320U (en) | 2022-02-17 | 2022-02-17 | Inductance device, converter circuit, printed circuit board, electronic equipment and power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220328109.8U CN217544320U (en) | 2022-02-17 | 2022-02-17 | Inductance device, converter circuit, printed circuit board, electronic equipment and power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217544320U true CN217544320U (en) | 2022-10-04 |
Family
ID=83427186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220328109.8U Active CN217544320U (en) | 2022-02-17 | 2022-02-17 | Inductance device, converter circuit, printed circuit board, electronic equipment and power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217544320U (en) |
-
2022
- 2022-02-17 CN CN202220328109.8U patent/CN217544320U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10790081B2 (en) | Interleaved converters with integrated magnetics | |
| CN109390118B (en) | Magnetic assembly and power conversion device applicable to same | |
| CN109391156B (en) | Power supply conversion device | |
| US7280026B2 (en) | Extended E matrix integrated magnetics (MIM) core | |
| US6980077B1 (en) | Composite magnetic core for switch-mode power converters | |
| US7427910B2 (en) | Winding structure for efficient switch-mode power converters | |
| CN107786090A (en) | With the multi-phase power supply inverter for Transformer Winding and the integrated core of inductor winding | |
| KR101259778B1 (en) | Three-phase high frequency transformer | |
| WO2011149954A2 (en) | Two-phase coupled inductors which promote improved printed circuit board layout | |
| US11270832B2 (en) | Integrated magnetic device and direct current-direct current converter | |
| WO2009059069A2 (en) | Magnetic components with m-phase coupling, and related inductor structures | |
| KR20120020325A (en) | Inductor core for power factor correction circuit | |
| JP2007128984A (en) | Magnetic part | |
| JP2008085004A (en) | Loosely-coupled transformer and switching power supply | |
| TW201539495A (en) | Surface mount power inductor component with stacked component accommodation | |
| TWI747508B (en) | Planar winding transformer | |
| CN217544320U (en) | Inductance device, converter circuit, printed circuit board, electronic equipment and power system | |
| CN211719418U (en) | High power density planar transformer | |
| JP2019079944A (en) | Coil component, circuit board, and power supply device | |
| CN113890361A (en) | Power supply module | |
| CN110635663B (en) | Integrated magnetic assembly and method of assembling the same | |
| CN216597239U (en) | Magnetic integrated device and isolated switching power supply | |
| JP7295914B2 (en) | Three-phase magnetic assembly with integral core body | |
| CN219842869U (en) | Magnetic integrated device and power supply equipment | |
| JP2019079945A (en) | Coil component, circuit board, and power supply device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |