CN112687458A - Multiphase staggered parallel integrated inductor and magnetic integrated circuit - Google Patents
Multiphase staggered parallel integrated inductor and magnetic integrated circuit Download PDFInfo
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Abstract
The invention provides a multiphase interleaving parallel integrated inductor, which comprises: coil, first magnetic core and with the second magnetic core of first magnetic core laminating, first magnetic core includes first back of the body post, two at least first side posts and two at least first center pillars, the second magnetic core includes that the second backs of the body post, will first center pillar with first side post is all integrated on first back of the body post, a plurality of independent inductances can be replaced to the parallelly connected integrated inductance that interlocks mutually, has eliminated the harmful effects that independent inductance is many, bulky, has improved the power density of system, has also saved the manufacturing cost of inductance simultaneously. The present invention also provides a magnetic integrated circuit comprising: rectifier circuit, power factor correction circuit and filter circuit, power factor correction circuit includes: the multiphase interleaving parallel integrated inductor improves the power density of the power factor correction circuit and reduces the number of components in the circuit.
Description
Technical Field
The invention relates to the field of electromagnetism, in particular to a multiphase staggered parallel integrated inductor and a magnetic integrated circuit.
Background
In a new energy automobile, a vehicle-mounted charger takes electricity from a power grid, and a common processing method at present is to rectify an alternating current voltage provided by the power grid into a direct current voltage by using a rectification circuit and send the direct current voltage to a later stage so as to realize power supply of vehicle electric equipment. However, the conventional rectifier circuit has inherent defects, which cause the dc voltage and the current output by the rectifier circuit to have higher harmonic content, so in order to reduce the harmonic in the power supply circuit, a first-stage Power Factor Correction (PFC) circuit is usually added after the rectifier circuit, and thus the PFC circuit becomes a crucial circuit link.
A Boost circuit is generally used as the power factor correction circuit, and referring to fig. 1, fig. 1 is a schematic diagram of an overall circuit including the power factor correction circuit in the prior art, and the overall circuit includes: the power factor correction circuit 20 adopts a three-phase Boost booster circuit to be connected in parallel, the phases of all phases are staggered, the phase angles of the three phases are divided into 360 degrees evenly, the phase angles of the first phase are increased from 0 degree to the phase angle of the third phase in sequence, namely the phase angle of the first phase is 0 degree, the phase angle of the second phase is 120 degrees, and the phase angle of the third phase is 240 degrees; by analogy, when multiple phases (more than three phases) are connected in parallel, the phase angles of all the phases are equally divided into 360 degrees, and the phase angles of the first phase from 0 degree to the nth phase are sequentially increased (n is a positive integer more than 3). The existing power factor correction circuit has the problems of excessive number of independent inductance elements, excessive total volume of the independent inductance, excessive use amount of raw materials for manufacturing the independent inductance and the like.
Disclosure of Invention
The invention aims to provide a multiphase interleaving parallel integrated inductor and a magnetic integrated circuit, which aim to solve the problem that the number of independent inductors connected in parallel in a multiphase parallel circuit is too large.
In order to solve the above technical problem, the present invention provides a multiphase interleaving parallel integrated inductor, comprising: the coil, the first magnetic core and the second magnetic core attached to the first magnetic core;
the first magnetic core includes: a first back post having 2n sides; the n first side columns are arranged on the side edges of the first back column at intervals; each first middle column is arranged on the first back column and is positioned at an interval position between the adjacent first side columns;
the second magnetic core includes: the second back column is provided with 2n side edges, the second back column is attached to the first magnetic core and is parallel to the first back column, and the n first side columns and the n first middle columns are located between the first back column and the second back column;
the number of the coils is n, one coil is sleeved on one first middle column, and n is a positive integer greater than or equal to 2.
Optionally, in the multiphase interleaving parallel integrated inductor, the second magnetic core further includes:
the n second side columns are arranged on the side edges of the second back column at intervals, and one second side column is attached to one first side column; and the number of the first and second groups,
n second center pillars, every the second center pillar is located on the second back of the body post and be located adjacently the interval position between the second side post, one the second center pillar with one the laminating of first center pillar.
Optionally, in the multiphase interleaving parallel integrated inductor, the height of the first side column is the same as the height of the second side column.
Optionally, in the multiphase interleaving parallel integrated inductor, the height of the first center pillar is equal to or less than the height of the first side pillar.
Optionally, in the multiphase interleaving parallel integrated inductor, the height of the second center pillar is equal to or less than the height of the second side pillar.
Optionally, in the multiphase interleaved parallel integrated inductor, the first back column and the second back column are both 2n prism structures, and the first back column and the second back column have the same shape.
Optionally, in the multiphase interleaved parallel integrated inductor, the first center pillar and the second center pillar are both of a cylindrical structure, and the first center pillar and the second center pillar have the same shape.
Optionally, in the multi-phase interleaved parallel integrated inductor, the first side column has two side faces near the center of the first back column and is an arc face, and an opening of each arc face faces to the adjacent first middle column.
Optionally, in the multiphase interleaved parallel integrated inductor, the first side column and the second side column have the same shape.
Optionally, in the multiphase interleaving parallel integrated inductor, the material of the first magnetic core is ferrite, and the material of the second magnetic core is the same as the material of the first magnetic core.
Optionally, in the multi-phase interleaved parallel integrated inductor, the distances between two adjacent first center pillars are equal, and the distances between the adjacent first center pillars and the first side pillars are equal.
Based on the same inventive concept, the present invention also provides a magnetic integrated circuit, comprising:
the rectifying circuit is used for converting the alternating voltage into direct voltage and outputting the direct voltage and direct current to a later stage; and the number of the first and second groups,
the power factor correction circuit is used for eliminating harmonic waves in the direct current voltage and the direct current output by the rectifying circuit;
wherein the power factor correction circuit comprises:
the multi-phase interleaved parallel integrated inductor is used for inhibiting high-frequency ripples of direct current output by the rectifying circuit and storing partial energy of the direct current, the multi-phase interleaved parallel integrated inductor is arranged at the rear end of the rectifying circuit, and an output branch of the multi-phase interleaved parallel integrated inductor at least comprises two paths;
the switching circuit is used for controlling direct current in the multiphase interleaving parallel integrated inductor and is arranged at the rear end of the multiphase interleaving parallel integrated inductor; and the number of the first and second groups,
the filter circuit is used for removing ripples of the direct-current voltage and is arranged at the rear end of the switch circuit;
wherein, the crisscross parallel integrated inductance of heterogeneous includes: the coil, the first magnetic core and the second magnetic core attached to the first magnetic core;
the first magnetic core includes: a first back post having 2n sides; the n first side columns are arranged on the side edges of the first back column at intervals; each first middle column is arranged on the first back column and is positioned at an interval position between the adjacent first side columns;
the second magnetic core includes: the second back column is provided with 2n side edges, the second back column is attached to the first magnetic core and is parallel to the first back column, and the n first side columns and the n first middle columns are located between the first back column and the second back column;
the number of the coils is n, one coil is sleeved on one first middle column, and n is a positive integer greater than or equal to 2.
Optionally, in the magnetic integrated circuit, the output branch of the multiphase interleaving parallel integrated inductor includes three branches, the multiphase interleaving parallel integrated inductor is a three-phase interleaving parallel integrated inductor, a first back column of the multiphase interleaving parallel integrated inductor has 6 side edges, and the number of coils, the number of first side columns, and the number of first center columns of the multiphase interleaving parallel integrated inductor are all three.
In summary, the present invention provides a multiphase interleaving parallel integrated inductor, including: coil, first magnetic core and with the second magnetic core of first magnetic core laminating, first magnetic core includes first back of the body post, two at least first side posts and two at least first center pillars, the second magnetic core includes that the second backs of the body post, one the coil cover is established one on the first center post, will first center post with first side post is all integrated on first back of the body post, and from this, the complicated integrated inductance that connects in parallel of heterogeneous can replace a plurality of independent inductances, has eliminated the harmful effects that independent inductance is many, bulky. The present invention also provides a magnetic integrated circuit comprising: rectifier circuit, power factor correction circuit and filter circuit, power factor correction circuit includes: the multiphase interleaving parallel integrated inductor can replace a plurality of independent inductors connected in parallel to remove harmonic waves in the magnetic integrated circuit, reduces the area of a common magnetic circuit, improves the power density of a power factor correction circuit, reduces the number of components of the magnetic integrated circuit, saves raw materials and improves the production efficiency.
Drawings
FIG. 1 is a general circuit schematic including a power factor correction circuit in the prior art;
fig. 2 is a schematic diagram of a first magnetic core and a coil of a multiphase interleaved parallel integrated inductor according to a first embodiment of the invention;
fig. 3(a) and fig. 3(b) are schematic diagrams of two second magnetic cores of the multiphase interleaving integrated inductor according to the first embodiment of the present invention;
FIG. 4 is a general circuit diagram of a power factor correction circuit according to a first embodiment of the present invention;
FIG. 5 is a schematic top view of a magnetic integrated circuit according to a first embodiment of the present invention;
fig. 6 is a magnetic circuit diagram of a multiphase interleaving integrated inductor according to a first embodiment of the present invention;
fig. 7 is a schematic diagram of an optimized multiphase interleaved parallel integrated inductor according to a first embodiment of the present invention;
FIG. 8 is a schematic top view of a magnetic integrated circuit according to a second embodiment of the present invention;
10-a rectifying circuit, 20-a power factor correction circuit, 21-an independent inductor, 22-a multiphase staggered parallel integrated inductor, 23-a switching circuit and 24-a filter circuit; 100-coil, 110-first core, 111-first back leg, 112-first side leg, 113-first center leg, 120-second core, 121-second back leg, 122-second side leg, 123-second center leg.
Detailed Description
The multiphase interleaved parallel integrated inductor and magnetic integrated circuit according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
In the current PFC circuit, the multi-phase Boost circuits are connected in parallel, each phase of the Boost branch circuit includes an inductor, each phase of the inductor is independent, as shown in fig. 1, the three phase of the Boost branch circuit includes an independent inductor 21, namely an independent inductor L1, an independent inductor L2 and an independent inductor L3, the three independent inductors 21 are used for storing energy and filtering out direct current ripples, which causes the number of independent inductor elements in the power factor correction circuit to be too large and the total volume of the independent inductors to be too large, thereby causing the area of the power factor correction circuit to be too large, and also causing the usage of raw materials for manufacturing the independent inductors to be too large, thereby increasing the production cost.
Example one
Referring to fig. 2, fig. 3(a) and fig. 3(b), fig. 2 is a schematic diagram of a first magnetic core and a coil of a multiphase interleaved parallel integrated inductor according to a first embodiment of the present invention, and fig. 3(a) and fig. 3(b) are schematic diagrams of two second magnetic cores of the multiphase interleaved parallel integrated inductor according to a first embodiment of the present invention, where the multiphase interleaved parallel integrated inductor includes: coil 100, first magnetic core 110 and with second magnetic core 120 of first magnetic core 110 laminating, first magnetic core 110 includes: first back post 111, n first side posts 112 and n first center posts 113, first back post 111 has 2n sides, and n first side posts 112 locate at the side of first back post 111 at intervals, every first center post 113 is located on first back post 111 and is located adjacent the interval position between first side posts 112, the quantity of coil is n, one coil 100 cover is established on one first center post 113, wherein, n is the positive integer that is greater than or equal to 2.
Further, this embodiment introduces two different second cores 120, referring to fig. 3(a) and fig. 3(b), fig. 3(a) and fig. 3(b) are schematic diagrams of two second cores of the polyphase interleaving parallel integrated inductor according to the first embodiment of the present invention, as shown in fig. 3(a), a first one of the second cores 120 includes: a second back column 121, the second back column 121 having 2n side edges, the second back column 121 being capable of being attached to the first magnetic core 110 and parallel to the first back column 111 of the first magnetic core 110, n first side columns 112 and n first center columns 113 being located between the first back column 111 and the second back column 121, the second back column 121 being attached to and fixed to an end surface of the first side column 112 of the first magnetic core 110, the end surface of the first center column 113 being away from the first back column 111, and an end surface of the first center column 113 being away from the first back column 111 by gluing, and the coil 100 being sleeved on the first center column 113 being located between the first back column 111 and the second back column 121; as shown in fig. 3(b), the second magnetic core 120 of the second type includes: a second back column 121, n second side columns 122 and n second center columns 123, where n second side columns 122 are disposed on one side of the second back column 121 at intervals, each second center column 123 is disposed on the second back column 121 and is located at an interval between adjacent second side columns 122, an end surface of the second side column 122 far away from the second back column 121 is correspondingly attached to an end surface of the first side column 112 far away from the first back column 121, and an end surface of the second center column 123 far away from the second back column 121 is attached to an end surface of the first center column 113 far away from the second back column 121. The first core 110 may be combined with the first and second cores 120 to form a pair of cores, and the first core 110 may be combined with the second core 120 to form a pair of cores. The n first center pillars 113 and the n first side pillars 112 are arranged on the first back pillar 111, the n second center pillars 123 and the n second side pillars 122 are arranged on the second back pillar 121, sharing of the first back pillar 111 and the second back pillar 121 is achieved, the multi-phase staggered parallel integrated inductor replaces a plurality of independent inductors in a total circuit, power density of a system is improved, meanwhile, the use amount of raw materials of the independent inductors is saved, and production cost is reduced.
Preferably, the first back column 111 and the second back column 121 are both 2n prism structures, and the first back column 111 and the second back column 121 have the same shape; the first and second center pillars 113 and 123 are each a cylindrical structure, and the first and second center pillars 113 and 123 are identical in shape; the first side post 112 and the second side post 122 are identical in shape. In this embodiment, n may take a value of 3, as shown in fig. 2, fig. 3(a) and fig. 3(b), the first back column 111 and the second back column 121 are in a hexagonal prism structure with rounded corners, each of the first back column 111 and the second back column 121 has six sides, three first side columns 112 are disposed on three sides of the first back column 111 at intervals, the first center column 113 is disposed at an interval between adjacent first side columns 112, and the second magnetic core 120 and the first magnetic core 110 of the second type described in this embodiment are completely the same. The three coils 100 are wound on the three first center pillars 113 respectively to form three windings, that is, the multiphase interleaving parallel integrated inductor is equivalent to integrating three independent inductors, thereby eliminating the adverse effects of large number and large volume of the independent inductors and improving the power density of the system.
Preferably, the distance between any two adjacent first center pillars 113 may be set to be equal, that is, all the first center pillars 113 are uniformly arranged on the first back pillar 111; the pitches of the adjacent first center pillars 113 and the first side pillars 113 may be set to be equal.
Further, the height of the first side column 112 is the same as the height of the second side column 122, the height of the first center column 113 is equal to or less than the height of the first side column 112, and the height of the second center column 123 is equal to or less than the height of the second side column 122. When the height of the first center pillar 113 is equal to the height of the first side pillar 112 and the height of the second center pillar 123 is equal to the height of the second side pillar 122, the air gap formed between the first center pillar 113 and the second center pillar 123 is air-gap-free; when the height of the first center pillar 113 is less than the height of the first side pillar 112 and the height of the second center pillar 123 is equal to the height of the second side pillar 122, or the height of the first center pillar 113 is equal to the height of the first side pillar 112 and the height of the second center pillar 123 is less than the height of the second side pillar 122, the air gap generated when the first center pillar 113 and the second center pillar 123 are attached is in the form of a half-open air gap; when the height of the first center leg 113 is less than the height of the first side leg 112 and the height of the second center leg 123 is less than the height of the second side leg 122, the air gap formed when the first center leg 113 and the second center leg 123 are attached is a full open air gap.
Further, the material of the first magnetic core 110 may be ferrite, and the material of the second magnetic core 120 and the material of the first magnetic core 110 are the same.
Based on the same inventive concept, the present invention further provides a magnetic integrated circuit, and referring to fig. 4, fig. 4 is a general circuit diagram including a power factor correction circuit according to a first embodiment of the present invention, where the magnetic integrated circuit includes: the power factor correction circuit comprises a rectifying circuit 10 and a power factor correction circuit 20, wherein the rectifying circuit 10 is used for converting alternating-current voltage into direct-current voltage and outputting the direct-current voltage and direct current to a later stage; the power factor correction circuit 20 is configured to eliminate harmonics in the dc voltage and the dc current output by the rectifier circuit, and further, the power factor correction circuit 20 includes: the multi-phase interleaved parallel integrated inductor 22 is used for suppressing high-frequency ripples of direct current output by a rectifying unit and storing partial energy of the direct current, the multi-phase interleaved parallel integrated inductor is arranged at the rear end of the rectifying unit, and output branches of the multi-phase interleaved parallel integrated inductor at least comprise two paths; the switch circuit 23 is configured to control a direct current in the multiphase interleaving parallel integrated inductor 22, that is, the switching circuit 23 is turned on and off at a high frequency to realize a rise and fall of the direct current in the multiphase interleaving parallel integrated inductor 22, so as to realize a process of continuously storing and releasing energy of the multiphase interleaving parallel integrated inductor 22, and the switch circuit 23 is disposed at a rear end of the multiphase interleaving parallel integrated inductor; the filter circuit 24 is configured to remove a ripple of the dc voltage, and the filter circuit 24 is disposed at a rear end of the switch circuit 23.
Preferably, the multiphase interleaving parallel integrated inductor comprises: a coil 100, a first magnetic core 110, and a second magnetic core 120 attached to the first magnetic core 100; the first magnetic core 110 includes: a first back column 111, the first back column 111 having 2n sides; n first side columns 112, wherein the n first side columns 112 are arranged on the side edges of the first back column 111 at intervals; n first center pillars 113, each first center pillar 113 being disposed on the first back pillar 111 at a position spaced apart from the adjacent first side pillars 112; the second magnetic core 120 includes: a second back column 121, wherein the second back column 121 has 2n sides, the second back column 121 is attached to the first magnetic core 110 and parallel to the first back column 111, and n first side columns 112 and n first center columns 113 are located between the first back column 111 and the second back column 121; the number of the coils 100 is n, one coil 100 is sleeved on one first center pillar 113, and n is a positive integer greater than or equal to 2. The multiphase staggered parallel integrated inductor 22 can replace a plurality of independent inductors connected in parallel to remove harmonic waves in the magnetic integrated circuit, so that the area of a common magnetic circuit is reduced, the power density of the power factor correction circuit is improved, the number of components of the magnetic integrated circuit is reduced, raw materials are saved, and the production efficiency is improved.
In this embodiment, the output branch of the multiphase interleaving integrated inductor 22 includes three branches, the multiphase interleaving integrated inductor is a three-phase interleaving integrated inductor, the first back column 111 of the multiphase interleaving integrated inductor 22 has 6 sides, and the number of the coil 100 of the multiphase interleaving integrated inductor 22, the number of the first side column 112 of the first magnetic core 110, and the number of the first middle column 113 are three. Taking the second core 120 of the second type as an example, the number of the second side legs 122 and the number of the second center legs 123 are three.
Next, taking a three-phase interleaved parallel integrated inductor as an example, the working principle of the multi-phase interleaved parallel integrated inductor in the PFC circuit is described. Fig. 5 and fig. 6, fig. 5 is a schematic top view of a magnetic integrated magnetic circuit according to a first embodiment of the present invention, fig. 6 is a schematic magnetic circuit diagram of a multiphase interleaving parallel integrated inductor according to a first embodiment of the present invention, a phase angle difference of current in a coil winding of the multiphase interleaving parallel integrated inductor is realized by circuit switch timing control, and phase angles of three-phase currents are respectively:the directions of the currents in the coils (windings) are as shown in fig. 5, and the first side leg 112/the second side leg 122, and the first back leg 111/the second back leg 121 are a common magnetic path, and the magnetic fluxes of the respective phase inductances form a closed loop through the common magnetic path. As shown in fig. 6, taking the case where the distance between any two adjacent first center legs 113 is equal and the distance between the adjacent first center legs 113 and the adjacent first side legs 112 is equal as an example, the current in the coil of each phase inductor is composed of an alternating current component and a direct current component, the direct current component generates a direct current flux Φ dc in the center legs of the inductor, the alternating current component generates an alternating current flux Φ ac in the center legs, and each center leg is opened with an air gap to cause a magnetic resistance R thereof to be equal0、R01、R02The reluctance R of the common magnetic circuit formed by the first side column 112/the second side column 122 and the first back column 111/the second back column 121 is much larger than that1、R2、R3Therefore, considering that the ac magnetic flux and the dc magnetic flux of each of the first center leg 113/the second center leg 123 form a magnetic path closure only through the common magnetic paths of the first side leg 112/the second side leg 122 and the first back leg 111/the second back leg 121, in the present embodiment, the mutual influence of the magnetic fluxes between all the first center legs 113/all the second center legs 123 of each phase inductance can be ignored. In the common magnetic circuits of the first side column 112/the second side column 122 and the first back column 111/the second back column 121, since the current phase angles of the three-phase interleaved parallel integrated inductors are different by 120 °, as shown in fig. 4, there are two first center columns/second center columns in which the current directions are the same, so that the dc magnetic fluxes generated by the three-phase interleaved parallel integrated inductors are mutually cancelled in the common magnetic circuits of any two first side columns and any two second side columns, and the ac magnetic fluxes are temporally superposed; and the common magnetic paths of the direct current magnetic fluxes generated by the three-phase interleaved parallel integrated inductors on the third first side column are mutually superposed, and the alternating current magnetic fluxes are also superposed in a time sequence. The magnetic fluxes generated by the direct current components of the currents of the multi-phase interleaved parallel integrated inductors can be mutually offset in the first back column/the second back column and any two first side columns/second side columns, so that the sectional area of a common magnetic circuit is reduced, and the independent magnetic circuit is eliminatedThe influence of the large volume of the vertical inductor further reduces the production cost.
Further, the shape of the first side column 112 and the second side column 122 is not limited in any way, and the three first side columns 112 of the first magnetic core 110 or the three second side columns 122 of the second magnetic core 120 may have the same shape, as shown in fig. 2 and fig. 4, an outer side surface of the first side column 112 opposite to the center of the first back column 111 is a plane, and the plane is parallel to the side surface of the first back column 111; the first side column 112 has two inner side surfaces near the center of the first back column 111 and is an arc surface, and the opening of each arc surface faces the first middle column 113; in addition, the shapes of the three first side pillars 112 of the first magnetic core 110 or the three second side pillars 122 of the second magnetic core 120 may not be completely the same, and only the shapes of the first side pillars 112 and the second side pillars 122 in the same multiphase interleaving parallel integrated inductor need to be the same, and the multiphase interleaving parallel integrated inductor provided by the present invention may be further optimized, please refer to fig. 7, which is a schematic diagram of an optimized multiphase interleaving parallel integrated inductor according to a first embodiment of the present invention, wherein two first side pillars 112/second side pillars 122 may be optimized to have a smaller cross-sectional area than the third first side pillars 112/second side pillars 122, the smaller structures of the two first side pillars 112/second side pillars 122 may be cylinders, the shapes of the third first side pillars 112/second side pillars 122 may be the same as the shapes of the first side pillars 112/second side pillars 122 shown in fig. 2 or fig. 4, the optimized multiphase interleaving parallel integrated inductor shown in fig. 7 can improve the mechanical strength of the structure of the first magnetic core 110/the second magnetic core 120 and the heat dissipation condition of each winding, and further save the usage amount of raw materials of the multiphase interleaving parallel integrated inductor, thereby further reducing the volume and the manufacturing cost of the multiphase interleaving parallel integrated inductor.
Example two
Referring to fig. 8, fig. 8 is a schematic top view of a magnetic integrated magnetic circuit according to a second embodiment of the present invention, in this embodiment, n is 4, and the multiphase interleaved parallel integrated inductor includes: a first magnetic core 110, a second magnetic core 120, and a coil 100, wherein the first magnetic core 110 includes: the first magnetic core 110 includes a first back column 111, four first side columns 112, and four first center columns 113, where the first back column 111 has eight sides, the four first side columns 112 are disposed on the four sides of the first back column 111 at intervals, the first center columns 113 are disposed at intervals between adjacent first side columns 112, and four coils 100 are wound around the four first center columns 113 to form four windings. The second magnetic core of the present embodiment may also include only the second back pillar, or may also include the second back pillar, four second side pillars, and four second center pillars. The multiphase interleaving parallel integrated inductor is equivalent to four integrated independent inductors, namely the multiphase interleaving parallel integrated inductor is a four-phase multiphase interleaving parallel integrated inductor, so that the adverse effects of large number and large volume of the independent inductors are eliminated, and the power density of a system is improved.
The phase angle difference of the current in the coil winding of the four-phase multiphase interleaving parallel integrated inductor is realized by circuit switch time sequence control, the phase angles of the four-phase current are respectively as follows: as shown in fig. 8, the directions of the currents in the coils (windings) are, for example, the same distance between any two adjacent first center legs 113 and the same distance between the adjacent first center legs 113 and first side legs 112, the first side legs 112/the second side legs 122, the first back legs 111/the second back legs 121 are in a common magnetic path, and the magnetic fluxes of the respective phase inductances form a closed loop through the common magnetic path. In the present embodiment, the mutual influence of the magnetic fluxes between all the first center legs 113/all the second center legs 123 of the inductances of the respective phases can also be ignored. In the common magnetic paths of the first side column 112/the second side column 122 and the first back column 111/the second back column 121, since the phase angles of the currents of the four-phase multiphase interleaved parallel integrated inductors are different by 90 °, the directions of the currents of the two first center columns/the two second center columns are necessarily the same, so that the direct current fluxes generated by the four-phase multiphase interleaved parallel integrated inductors completely cancel each other in the common magnetic paths of the four first side columns/the four second side columns, and the alternating current fluxes are overlapped in time sequence. The magnetic flux generated by the direct current component of the current of the multi-phase interleaved parallel integrated inductor can be mutually offset in the first back column/the second back column and all the first side columns/the second side columns, so that the sectional area of a common magnetic circuit is reduced, the influence of large volume of the independent inductor is eliminated, and the production cost is further reduced.
The parts not described in the second embodiment can be referred to the first embodiment, and the second embodiment is not described again.
In summary, the present invention provides a multiphase interleaving parallel integrated inductor, including: coil, first magnetic core and with the second magnetic core of first magnetic core laminating, first magnetic core includes first back of the body post, two at least first side posts and two at least first center pillars, the second magnetic core includes that the second backs the post, one the coil cover is established one on the first center post, will first center post with first side post is all integrated on first back of the body post, the complicated parallelly connected integrated inductance of heterogeneous has replaced a plurality of independent inductances in the total circuit, has eliminated the harmful effects that independent inductance is many, bulky, has improved the power density of system, has also saved the use amount of the raw and other materials of components and parts simultaneously, has reduced manufacturing cost. The present invention also provides a magnetic integrated circuit comprising: rectifier circuit, power factor correction circuit and filter circuit, power factor correction circuit includes: the multiphase interleaving parallel integrated inductor can replace a plurality of independent inductors connected in parallel to remove harmonic waves in the magnetic integrated circuit, reduces the area of a common magnetic circuit, improves the power density of a power factor correction circuit, reduces the number of components of the magnetic integrated circuit, saves raw materials and improves the production efficiency.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (13)
1. A multiphase interleaving parallel integrated inductor is characterized by comprising: the coil, the first magnetic core and the second magnetic core attached to the first magnetic core;
the first magnetic core includes: a first back post having 2n sides; the n first side columns are arranged on the side edges of the first back column at intervals; each first middle column is arranged on the first back column and is positioned at an interval position between the adjacent first side columns;
the second magnetic core includes: the second back column is provided with 2n side edges, the second back column is attached to the first magnetic core and is parallel to the first back column, and the n first side columns and the n first middle columns are located between the first back column and the second back column;
the number of the coils is n, one coil is sleeved on one first middle column, and n is a positive integer greater than or equal to 2.
2. The poly-phase interleaved integrated inductor according to claim 1 wherein said second magnetic core further comprises:
the n second side columns are arranged on the side edges of the second back column at intervals, and one second side column is attached to one first side column; and the number of the first and second groups,
n second center pillars, every the second center pillar is located on the second back of the body post and be located adjacently the interval position between the second side post, one the second center pillar with one the laminating of first center pillar.
3. The poly-phase interleaved integrated inductor according to claim 2 wherein the height of said first side leg is the same as the height of said second side leg.
4. The poly-phase interleaved integrated inductor according to claim 3 wherein the height of the first center leg is equal to or less than the height of the first side leg.
5. The multiphase interleaved integrated inductor as claimed in claim 3, wherein the height of the second central pillar is equal to or less than the height of the second side pillar.
6. The poly-phase interleaved integrated inductor according to claim 1 wherein said first back-post and said second back-post are both 2n prism structures and said first back-post and said second back-post are identical in shape.
7. The multiphase interleaved integrated inductor according to claim 2, wherein the first and second stubs are each cylindrical structures, and the first and second stubs have the same shape.
8. The multiphase interleaved integrated inductor as claimed in claim 7, wherein the first side pillar has two sides near the center of the first back pillar and is an arc, and the opening of each arc faces the adjacent first middle pillar.
9. The poly-phase interleaved integrated inductor according to claim 8 wherein said first side leg and said second side leg are identical in shape.
10. The poly-phase interleaved integrated inductor as claimed in claim 1, wherein the material of said first core is ferrite, and the material of said second core is the same as the material of said first core.
11. The multiphase interleaved integrated inductor according to claim 1, wherein the adjacent two first center pillars are equally spaced, and the adjacent first center pillars and the first side pillars are equally spaced.
12. A magnetic integrated circuit, comprising:
the rectifying circuit is used for converting the alternating voltage into direct voltage and outputting the direct voltage and direct current to a later stage; and the number of the first and second groups,
the power factor correction circuit is used for eliminating harmonic waves in the direct current voltage and the direct current output by the rectifying circuit;
wherein the power factor correction circuit comprises:
the multi-phase interleaved parallel integrated inductor is used for inhibiting high-frequency ripples of direct current output by the rectifying circuit and storing partial energy of the direct current, the multi-phase interleaved parallel integrated inductor is arranged at the rear end of the rectifying circuit, and an output branch of the multi-phase interleaved parallel integrated inductor at least comprises two paths;
the switching circuit is used for controlling direct current in the multiphase interleaving parallel integrated inductor and is arranged at the rear end of the multiphase interleaving parallel integrated inductor; and the number of the first and second groups,
the filter circuit is used for removing ripples of the direct-current voltage and is arranged at the rear end of the switch circuit;
wherein, the crisscross parallel integrated inductance of heterogeneous includes: the coil, the first magnetic core and the second magnetic core attached to the first magnetic core;
the first magnetic core includes: a first back post having 2n sides; the n first side columns are arranged on the side edges of the first back column at intervals; each first middle column is arranged on the first back column and is positioned at an interval position between the adjacent first side columns;
the second magnetic core includes: the second back column is provided with 2n side edges, the second back column is attached to the first magnetic core and is parallel to the first back column, and the n first side columns and the n first middle columns are located between the first back column and the second back column;
the number of the coils is n, one coil is sleeved on one first middle column, and n is a positive integer greater than or equal to 2.
13. The magnetic integrated circuit of claim 12, wherein the output branch of the poly-phase interleaved parallel integrated inductor comprises three branches, the poly-phase interleaved parallel integrated inductor is a three-phase interleaved parallel integrated inductor, the first back pillar of the poly-phase interleaved parallel integrated inductor has 6 side edges, and the number of the coils, the first side pillars, and the first center pillar of the poly-phase interleaved parallel integrated inductor is three.
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Application publication date: 20210420 |