CN111029121A - Construction method of array type integrated magnetic part of multiphase coupling inductor and integrated inductor - Google Patents
Construction method of array type integrated magnetic part of multiphase coupling inductor and integrated inductor Download PDFInfo
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Abstract
本发明提供一种多相耦合电感的阵列式集成磁件的构造方法及集成电感，属于电感器技术领域。本发明构造方法包括如下步骤：构建矩阵结构，所述耦合磁芯单元采用矩阵化结构布局；基于所述矩阵结构，构造矩阵式集成电感；采用多相电感对称化全耦合或多相电感对称化首尾次序耦合，形成对称化的集成电感。本发明的有益效果为：可消除直流偏磁、可自由调节耦合度、可任意拓展集成相数。
The invention provides a construction method of an array-type integrated magnetic component of a polyphase coupled inductor and an integrated inductor, which belong to the technical field of inductors. The construction method of the present invention includes the following steps: constructing a matrix structure, and the coupled magnetic core unit adopts a matrix structure layout; based on the matrix structure, constructing a matrix integrated inductance; using polyphase inductance symmetry to fully couple or polyphase inductance symmetry The end-to-end sequence is coupled to form a symmetrical integrated inductor. The beneficial effects of the invention are as follows: DC bias can be eliminated, coupling degree can be adjusted freely, and the number of integrated phases can be expanded arbitrarily.
Description
Technical Field
The invention relates to the technical field of inductors, in particular to a method for constructing an array type integrated magnetic component of multiphase coupling inductance, and also relates to an integrated inductance constructed by the method for constructing the array type integrated magnetic component of the multiphase coupling inductance.
Background
The integrated inductor is used as an important component of the multiphase interleaved parallel magnetic integrated converter, not only determines the size, weight and cost of the converter to a great extent, but also directly influences the efficiency, output dynamic and steady-state performance of the converter. At present, the conventional integrated inductor applied to the multiphase interleaving parallel magnetic integrated converter generally has a plurality of problems, loss increase and EMI deterioration are caused by direct current magnetic biasing and asymmetry, the design cost is high, the manufacturing and processing process is complex, standardization is difficult to realize, the temperature rise problem and the like become bottlenecks which restrict further high frequency of the multiphase interleaving parallel magnetic integrated converter. Therefore, the novel high-frequency integrated magnetic component which has strong heat dissipation capability, can eliminate direct-current magnetic bias and has symmetrical variable coupling degree has important significance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an array type integrated magnetic component of a multiphase coupling inductor, which can realize the symmetrical design of the multiphase coupling inductor, can change the coupling degree, can eliminate direct current bias and can inhibit EMI, and also provides an integrated inductor constructed by the construction method of the array type integrated magnetic component of the multiphase coupling inductor.
The construction method comprises the following steps:
the method comprises the following steps: constructing a matrix structure, wherein the coupling magnetic core units adopt a matrixing structure layout;
step two: constructing a matrix type integrated inductor based on the matrix structure;
step three: a symmetrical full coupling of multiphase inductors or symmetrical head-to-tail sequential coupling of the multiphase inductors is adopted to form a symmetrical integrated inductor, and the specific coupling method comprises the following steps:
the forward coupling windings of the coupling magnetic core units are sequentially connected in series by using a conducting wire to form main inductance, the reverse coupling windings of the coupling magnetic core units are sequentially connected in series to form mutual inductance, wherein two windings on the diagonal coupling magnetic core units are wound in the forward direction, and the windings on the other coupling magnetic core units are wound in the reverse direction.
The invention is further improved, in the third step, the symmetrical integrated inductor adopting the symmetrical full coupling of the multiphase inductor adopts the flexible combination of a double-winding coupling magnetic core unit and a single-winding magnetic core unit, and the multiphase symmetrical matrix integrated inductor is constructed through the series-parallel connection structure of small magnetic cores of each unit.
The invention further improves, the matrix integrated inductor comprises an N-phase fully-coupled inductor full matrix topological structure and a half-angle type matrix topological structure, the full matrix topological structure comprises three matrix structures of N multiplied by N, N multiplied by 2N and 2N coupled magnetic core units, the half-angle type matrix topological structure comprises two basic forms of an upper triangular matrix and a lower triangular matrix, the number of elements in the matrix is the same and corresponds to the full matrix topological structure, the half-angle type matrix topological structure also comprises three matrix structures of 1/2(N multiplied by (N +1)), 1/2(N multiplied by (2N +1) and N +1, wherein N is an element in the matrix and represents the number of the coupled magnetic core units in the array integrated inductor,
the elements of the coupling magnetic core units in the matrix integrated inductor are arranged in a matrix structure, the coupling magnetic core units at the positions of the matrix elements are formed by winding double windings, wherein the coupling magnetic core units at the positions on the main diagonal of the matrix are forward coupling magnetic cores, namely the coupling magnetic core units placed on the main diagonal of the matrix structure are positively coupled by the two windings, and the two windings of the coupling magnetic core units at other positions are wound in opposite phases.
The invention is further improved, the forward coupling magnetic core unit at the main diagonal position of the matrix structure provides the main inductance L of the multiphase integrated inductor, and the coupling coefficient between two forward coupling windings is 1 or is as close to 1 as possible; the reverse coupling magnetic core units on the other off-diagonal positions provide the mutual inductance M required by the multiphase reverse integrated inductor, the coupling coefficient between the two reverse coupling windings on the off-diagonal magnetic core is an adjustable coefficient,
through the series connection of the little magnetic core of coupling magnetic core unit inductance volume, the self-inductance volume of the integrated inductance of matrix is L + M, and mutual inductance volume is M, then through the kind, specification, the air gap of adjusting the reverse coupling magnetic core unit, unit self-inductance volume and unit mutual inductance volume to and the reverse coupling coefficient of two windings on the reverse coupling unit magnetic core on the non-main diagonal, realize the regulation of every looks coupling inductance leakage inductance and the regulation of coupling coefficient between the heterogeneous inductance, finally realize the symmetrical total coupling design of the integrated converter of the crisscross parallel magnetism of heterogeneous.
The invention is further improved by adopting a symmetrical integrated inductor which is formed by symmetrical end-to-end sequential coupling of multiphase inductors and an array structure which is in ring-type end-to-end connection, wherein a basic matrix structure of the integrated inductor is formed by sequentially connecting 1/2 NxN coupling magnetic core units end to end, the N-phase integrated inductor which is in end-to-end sequential comprises 2N arrayed magnetic core units, N coupling magnetic core unit elements are arranged on the abscissa of the matrix inductor, and 1/2N coupling magnetic core unit elements are arranged on the ordinate.
The invention is further improved, and the improved matrix structure based on the basic matrix structure is as follows: the N-phase integrated inductor with symmetrical head-to-tail sequence is formed by connecting 2N coupling magnetic core units in a polygonal head-to-tail sequence, wherein the N coupling magnetic core units are positioned at the vertex position of an N-polygon to provide the inductance of each phase of inductor, the other N coupling magnetic core units are positioned at the middle position of a matrix to provide the mutual inductance of the multiphase coupling inductor to realize the adjustment of the coupling coefficient, in addition, the small coupling magnetic cores of the self-inductance unit and the mutual inductance unit can adjust the position in real time according to the structural requirements of the converter,
the coupling magnetic core units at the vertex positions adopt forward double-coupling windings, and the coupling magnetic core units at the middle positions of the matrix adopt reverse single-winding arrangement.
The invention is further improved, in the third step, the symmetrical integrated inductor and the forward coupling magnetic core units on the main diagonal all adopt single windings with the same inductance value to replace two forward coupling windings.
The invention is further improved, and in the third step, the design implementation manner of the symmetrical integrated inductor is as follows: through a reverse deduction topology multiplexing principle, a traditional coupling inductance magnetic core and a winding are cut equivalently, a multi-scale analysis method that a physical magnetic field, an electric field and a circuit are combined and a magnetic circuit-circuit equivalent dual transformation model is fused is adopted, and therefore a mechanism and a symmetrical design rule that the integrated magnetic piece can eliminate direct current magnetic bias, freely adjust coupling degree and arbitrarily expand integrated phase number are found.
The invention also provides an integrated inductor constructed by the construction method of the array type integrated magnetic part of the multiphase coupling inductor, which comprises a plurality of coupling magnetic core units, wherein the coupling inductor units comprise self-inductance inductor units and mutual inductance inductor units which are arranged in a staggered mode, forward coupling windings of the self-inductance inductor units are sequentially connected in series to form main inductance, and reverse coupling windings of the mutual inductance inductor units are sequentially connected in series to form mutual inductance.
The invention is further improved, in the matrix structure, two phases of windings on the diagonal coupling magnetic core units are wound in the forward direction, and the windings on the other coupling magnetic core units are wound in the reverse direction.
Compared with the prior art, the invention has the beneficial effects that: the device has the advantages of increasing effective heat dissipation area, having high heat dissipation performance, eliminating direct current magnetic bias, freely adjusting coupling degree and freely expanding integrated phase number.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic diagram of a full matrix element of an N-phase fully-coupled symmetrical inductor;
fig. 3 is a full matrix structure and connection schematic diagram of a basic type N × N structure of an N-phase fully-coupled symmetric inductor;
FIG. 4 is a full matrix structure and connection diagram of an improved 2 NxN structure of an N-phase fully-coupled symmetrical inductor;
fig. 5 is a full matrix structure and a connection schematic diagram (improved 2N structure) of an N-phase fully-coupled symmetrical inductor;
FIG. 6 is a schematic diagram of a half-matrix structural element of an N-phase fully-coupled symmetrical inductor;
FIG. 7 is a schematic diagram of a connection of a half-matrix structure of a basic 1/2 (Nx (N +1)) structure of an N-phase fully-coupled symmetrical inductor;
FIG. 8 is a schematic diagram of a matrix structure and connections of a basic 1/2 (NxN) structure of N-phase end-to-end order symmetric coupled inductors;
FIG. 9 is a ring matrix structure of an N-phase end-to-end sequence symmetric coupled inductor, in which three magnetic cores are connected end-to-end in sequence in an improved structure when the number of winding turns of the coupled magnetic core unit is 1 turn;
fig. 10 is a ring matrix structure of an N-phase end-to-end order symmetric coupled inductor, when the number of winding turns of the coupled magnetic core unit is 1 turn, a four-magnetic core end-to-end order improved structure.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention provides a novel matrix type symmetrical high-frequency integrated inductor by reversely deducing a topology multiplexing principle on the basis of analyzing the influence of the asymmetry of the integrated inductor on the output characteristic of a high-frequency multiphase staggered parallel magnetic integrated converter in order to solve the problems in the prior art. A multi-scale analysis method of field and path combination and decoupling magnetic integration is adopted, a mechanism that an integrated magnetic part can eliminate direct-current magnetic bias, can freely adjust coupling degree and can arbitrarily expand integrated phase number is explored, and a coupling inductor suitable for a multi-phase interleaved magnetic integrated converter is provided, in particular to an array type integrated magnetic part which can realize symmetrical design of the multi-phase coupling inductor, can change the coupling degree, can eliminate direct-current bias and can inhibit EMI and a multi-degree-of-freedom construction method thereof.
As shown in fig. 1, the construction method of the present invention comprises the steps of:
the method comprises the following steps: constructing a matrix structure, wherein the coupling magnetic core units adopt a matrixing structure layout;
step two: constructing a matrix type integrated inductor based on the matrix structure;
step three: a symmetrical full coupling of multiphase inductors or symmetrical head-to-tail sequential coupling of the multiphase inductors is adopted to form a symmetrical integrated inductor, and the specific coupling method comprises the following steps:
the forward coupling windings of the coupling magnetic core units are sequentially connected in series by using a conducting wire to form main inductance, the reverse coupling windings of the coupling magnetic core units are sequentially connected in series to form mutual inductance, wherein two windings on the diagonal coupling magnetic core units are wound in the forward direction, and the windings on the other coupling magnetic core units are wound in the reverse direction.
The multiphase coupling inductor adopts a matrix structure layout, adopts coupling magnetic core units and a flexible combination concept thereof, can construct multiphase symmetric coupling matrix type integrated inductors, can realize symmetrical full coupling of the multiphase inductors and symmetrical head-to-tail sequential coupling of the multiphase inductors, has derivation and expandable capabilities, and can derive a series of multi-degree-of-freedom coupling forms, matrix structures and topology combinations according to specific conditions by comprehensively considering factors such as loss, design difficulty, magnetic core heating problems, coupling coefficients and magnetic leakage.
The integrated inductor of the embodiment can realize the symmetrical design of multi-phase full coupling, and has the advantages of adjustable coupling coefficient, capability of eliminating direct current bias, capability of inhibiting high-frequency EMI, simple structure and strong universality. The novel symmetrical multi-phase coupling inductor adopts a matrix structure layout, so that the heat dissipation area can be increased, the electromagnetic interference is improved, and the comprehensive application performance is improved. The construction theory has universality, universality and expansibility.
In the third step, the symmetrical integrated inductor adopting the symmetrical full coupling of the multiphase inductor adopts the flexible combination of the double-winding coupling magnetic core unit and the single-winding magnetic core unit, and the multiphase symmetrical matrix integrated inductor is constructed through the series-parallel connection structure of the small magnetic cores of each unit.
As shown in fig. 2 to 5, the matrix symmetric inductor has different combination forms based on adapting to different application occasions and different performance requirements and according to the characteristics of the magnetic core: the basic form of the full-matrix topology is an N-phase full-coupling inductance full-matrix topology, and the full-matrix topology comprises three matrix structures such as NxN, Nx2N and 2N unit magnetic cores, wherein the NxN type matrix structure is the basic form; the coupling coefficient of the Nx 2N type matrix structure is higher, but the number of magnetic cores is more, and the structure is more complex; the 2N type structure has the least quantity of magnetic cores and the least winding length, and the loss is lower, wherein N is an element in a matrix and represents the quantity of coupled magnetic core units in the array type coupled inductor.
Fig. 2 is a schematic diagram of a full matrix element of the N-phase fully-coupled symmetric inductor, fig. 3 is a schematic diagram of a full matrix structure and a connection of the N-phase fully-coupled symmetric inductor (basic N × N structure), and fig. 4 and fig. 5 are a schematic diagram of a full matrix structure and a connection of the N-phase fully-coupled symmetric inductor (improved 2N × N structure) and a schematic diagram of a full matrix structure and a connection of the N-phase fully-coupled symmetric inductor (improved 2N structure), respectively, where the N × 2N matrix structure has a higher coupling coefficient, but has a larger number of magnetic cores and a more complex structure; the 2N type structure has the least quantity of magnetic cores and the least winding length, and the loss is lower, wherein N is an element in a matrix and represents the quantity of coupled magnetic core units in the array type coupled inductor.
As shown in fig. 6 and 7, in order to save the number, volume and weight of the magnetic cores, the present invention can derive a half-angle matrix topology of N-phase fully-coupled inductors, and the half-angle matrix structure can be divided into two basic forms, namely an upper triangular matrix and a lower triangular matrix, according to the basic principle of the matrix, and the number of elements in the matrix is the same. Corresponding to the full matrix structure, the half-angle matrix coupled inductor has three matrix structures of 1/2(N × (N +1)), 1/2(N × (2N +1) and N +1, where N is also an element in the matrix, and represents the number of coupled core units in the array-type coupled inductor.
Fig. 6 is a schematic diagram of elements of a half-matrix structure of an N-phase fully-coupled symmetrical inductor, where the number of elements in the matrix is the same. Corresponding to the full matrix structure, the half-angle matrix coupled inductor has three matrix structures of 1/2(N × (N +1)), 1/2(N × (2N +1), and N +1, where N is also an element in the matrix and represents the number of coupled core units in the array coupled inductor, and fig. 7 shows a connection diagram of the half-matrix structure of N-phase fully-coupled symmetrical inductors (basic 1/2(N × (N +1)) structure).
The novel symmetrical fully-coupled inductor is formed by arranging coupling magnetic core unit elements in a matrix structure no matter in a basic N multiplied by N matrix structure, an improved N multiplied by 2N and 2N full matrix structure or a half-angle matrix structure with less coupling magnetic core units, the coupling magnetic core units at the positions of the matrix elements are formed by winding double windings, wherein the coupling magnetic core units at the positions on main diagonals of the matrix are forward coupling magnetic cores, namely the coupling magnetic core units at the positions on the main diagonals of the matrix structure are positively coupled by the two windings, the two windings of the coupling magnetic core units at the other positions are reversely wound, and the coupling magnetic fluxes of the units are combined by multiple degrees of freedom in series-parallel connection, so that the reverse coupling between the phases of the multi-phase coupling inductor can be finally realized.
In the full matrix or half-angle matrix symmetric coupling inductor based on the double-winding coupling magnetic core units, the forward coupling magnetic core units at the main diagonal positions of the matrix structure provide the main inductance L of the multiphase coupling inductor, and the coupling coefficient between two forward coupling windings is 1 or is as close to 1 as possible; the reverse coupling magnetic core units on the rest off-diagonal positions provide the mutual inductance M required by the multiphase reverse coupling inductor, and the coupling coefficient between the two reverse coupling windings on the off-diagonal magnetic core is an adjustable coefficient. Finally, the small magnetic cores with unit inductance are connected in series, the self-inductance of the coupling inductor is L + M, the mutual inductance is M, then the adjustment of leakage inductance of each phase of coupling inductance and the adjustment of coupling coefficient between multiphase inductances can be realized by adjusting the type, specification and air gap of the reverse coupling magnetic core units, the self-inductance of the units, the mutual inductance of the units and the reverse coupling coefficients of two windings on the reverse coupling magnetic cores of the units on the non-main diagonal, and finally the symmetrical full-coupling design of the multiphase staggered parallel magnetic integrated converter is realized.
As shown in fig. 8-10, as the number of coupling phases of the multiphase full-coupling inductor increases, the coupling coefficient will continuously decrease, and the expansion of the number of coupling phases is restricted, so that the invention further develops a method for symmetrical end-to-end sequential coupling of the multiphase coupling inductor, and can realize the arbitrary expansion of the number of coupling phases of the multiphase interleaved parallel magnetic integrated converter, and the end-to-end sequential coupling inductor has 1/2N × N type basic matrix structure and 2N improved matrix structure.
The invention relates to an integrated inductor with symmetrical coupling in an end-to-end sequence, which mainly adopts a ring-type end-to-end array structure, wherein a basic matrix structure is formed by connecting 1/2 NxN coupling magnetic core units in an end-to-end sequence; fig. 8 shows a matrix structure and a connection schematic diagram (basic 1/2(N × N) structure) of an N-phase end-to-end-sequential symmetric coupled inductor, where the N-phase end-to-end-sequential coupled inductor is composed of 2N arrayed core units, and the abscissa of the matrix inductor has N coupled core unit elements and the ordinate has 1/2N coupled core unit elements.
The improved matrix structure is shown in fig. 9 and 10, and takes a turn of three-phase and four-phase symmetrical head-to-tail order coupling inductor as an example, the multi-turn connection mode is the same as that of a turn, the N-phase head-to-tail order symmetrical coupling inductor is formed by connecting 2N coupling magnetic core units in a polygonal head-to-tail order, wherein the N magnetic cores are positioned at the vertex positions of an N-polygon to provide the inductance of each phase of inductance, the other N coupling magnetic core units are positioned at the middle positions of the matrix to provide the mutual inductance of the multi-phase coupling inductance to realize the adjustable coupling coefficient, and in addition, the small magnetic cores coupled by the self-inductance and mutual inductance units can be adjusted in real time according to the structural requirements of the.
In order to reduce the number of magnetic core windings, reduce the copper loss of the windings, improve the coupling coefficient of the magnetic core and adapt to more application occasions, forward coupling magnetic core units on the main diagonal of all types of array coupling inductors can be optimized, single windings with the same inductance value can be adopted to replace two forward coupling windings, the leakage inductance of the forward coupling magnetic core in the original scheme is reduced, the design difficulty is reduced, the design interval is expanded, and the coupling coefficient is favorably improved.
The inductance, the coupling coefficient and the leakage inductance value of the array type symmetrical multi-phase coupling integrated inductor can be provided and adjusted through a coupling magnetic core unit, the selection and the design of the magnetic core type have multi-degree-of-freedom selection, namely, a standardized magnetic core, a planar magnetic core, a PCB winding can be selected, various magnetic cores can be customized, the magnetic cores with the same specification, namely, the magnetic cores with the same magnetic resistance can be used, the magnetic cores with different specifications or materials can be used, namely, the magnetic cores with different magnetic resistances, the design flexibility, the flexibility and the expansibility are realized, the engineering and standardized operability are realized, the coupling magnetic core unit can be combined with the multi-degree-of-freedom, the unit position elements of a matrix structure can be adjusted and expanded at will, and the expansion of the coupling phase number of the multi-phase symmetrical integrated magnetic.
The array type integrated inductor of the invention equivalently cuts the magnetic core and the winding of the traditional coupled inductor by reversely deducing the topological multiplexing principle, adopts a multi-scale analysis method of combining a physical magnetic field, an electric field and a circuit and fusing a magnetic circuit-circuit equivalent dual transformation model, thereby finding out the mechanism and the symmetrical design rule of an integrated magnetic part which can eliminate direct current magnetic bias, can freely adjust the coupling degree and can arbitrarily expand the integrated phase number.
The novel integrated magnetic part is characterized by having the characteristic of coupling two windings of a unit magnetic core, and realizing mutual offset of the current direction of each winding and the direction and distribution of direct current flux of the windings through the two forward and reverse windings on the unit small magnetic core.
The invention has the beneficial effects that:
(1) the invention solves the problems that the coupling coefficient is continuously reduced and unbalanced and the number of coupling phases cannot be expanded as the number of phases of the traditional staggered parallel magnetic integration topology is increased, and solves the problem that the unbalance degree of each phase of inductance is increased when the inductance of the multiphase staggered parallel converter is coupled by using the integral magnetic core;
(2) the novel array structure of the integrated magnetic part increases the effective heat dissipation area, has high heat dissipation performance, and solves the problems of concentrated local hot spots, increased local temperature, large magnetic core volume and difficulty in handling the magnetic core height when the multi-phase interleaved parallel converter coupling inductance is realized by using the integral magnetic core in the prior art;
(3) the novel integrated inductor can adjust the coupling degree in a high-freedom manner without depending on an air gap, and the problem that the coupling coefficient between multi-phase inductors is not easy to adjust when the multi-phase interleaved parallel converter coupling inductor is realized by using an integral magnetic core in the prior art is solved;
(4) the problem that high-frequency EMI noise and mechanical noise are not easy to eliminate when the coupling inductance of the multiphase interleaved parallel converter is realized by using an integral magnetic core is solved;
(5) the problem of direct current magnetic biasing when the coupling inductance of the multiphase interleaved parallel converter is realized by using an integral magnetic core is solved;
(6) the problems of complex mold opening, difficult process and high cost of the magnetic core when the coupling inductance of the multiphase staggered parallel converter is realized by using the integral magnetic core are solved;
(7) the problem of when the traditional utilization whole magnetic core realizes heterogeneous crisscross parallel converter coupling inductance, process design and standardized production are difficult to manage and control is solved. The general design method of the flexible combination of the multiphase array type symmetrical magnetic integration theory and the coupling inductor is further enriched and perfected, and the method has great promotion significance for the standardized general design and the large-scale production of the high-frequency multiphase symmetrical coupling inductor.
The above-described embodiments are intended to be illustrative, and not restrictive, of the invention, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. The construction method of the array type integrated magnetic component of the multiphase coupling inductor, wherein the array type integrated magnetic component comprises a plurality of coupling magnetic core units, and is characterized by comprising the following steps of:
the method comprises the following steps: constructing a matrix structure, wherein the coupling magnetic core units adopt a matrixing structure layout;
step two: constructing a matrix type integrated inductor based on the matrix structure;
step three: a symmetrical full coupling of multiphase inductors or symmetrical head-to-tail sequential coupling of the multiphase inductors is adopted to form a symmetrical integrated inductor, and the specific coupling method comprises the following steps:
the forward coupling windings of the coupling magnetic core units are sequentially connected in series by using a conducting wire to form main inductance, the reverse coupling windings of the coupling magnetic core units are sequentially connected in series to form mutual inductance, wherein two windings on the diagonal coupling magnetic core units are wound in the forward direction, and the windings on the other coupling magnetic core units are wound in the reverse direction.
2. The method of construction of claim 1, wherein: in the third step, the symmetrical integrated inductor adopting the symmetrical full coupling of the multiphase inductor adopts the flexible combination of the double-winding coupling magnetic core unit and the single-winding magnetic core unit, and the multiphase symmetrical matrix integrated inductor is constructed through the series-parallel connection structure of the small magnetic cores of each unit.
3. The method of construction of claim 2, wherein: the matrix type integrated inductor comprises an N-phase fully-coupled inductor full matrix topological structure and a half-angle type matrix topological structure, wherein the full matrix topological structure comprises three matrix structures of N multiplied by N, N multiplied by 2N and 2N coupled magnetic core units, the half-angle type matrix topological structure comprises two basic forms of an upper triangular matrix and a lower triangular matrix, the number of elements in the matrix is the same, the matrix corresponds to the full matrix topological structure, the half-angle type matrix topological structure also comprises three matrix structures of 1/2 (Nx (N +1)), 1/2 (Nx (2N +1) and N +1, wherein N is an element in the matrix and represents the number of the coupled magnetic core units in the array type integrated inductor,
the elements of the coupling magnetic core units in the matrix integrated inductor are arranged in a matrix structure, the coupling magnetic core units at the positions of the matrix elements are formed by winding double windings, wherein the coupling magnetic core units at the positions on the main diagonal of the matrix are forward coupling magnetic cores, namely the coupling magnetic core units placed on the main diagonal of the matrix structure are positively coupled by the two windings, and the two windings of the coupling magnetic core units at other positions are wound in opposite phases.
4. A construction method according to claim 3, characterized in that: the forward coupling magnetic core unit at the main diagonal position of the matrix structure provides main inductance L of the multiphase integrated inductor, and the coupling coefficient between two forward coupling windings is 1 or is as close to 1 as possible; the reverse coupling magnetic core units on the other off-diagonal positions provide the mutual inductance M required by the multiphase reverse integrated inductor, the coupling coefficient between the two reverse coupling windings on the off-diagonal magnetic core is an adjustable coefficient,
through the series connection of the little magnetic core of coupling magnetic core unit inductance volume, the self-inductance volume of the integrated inductance of matrix is L + M, and mutual inductance volume is M, then through the kind, specification, the air gap of adjusting the reverse coupling magnetic core unit, unit self-inductance volume and unit mutual inductance volume to and the reverse coupling coefficient of two windings on the reverse coupling unit magnetic core on the non-main diagonal, realize the regulation of every looks coupling inductance leakage inductance and the regulation of coupling coefficient between the heterogeneous inductance, finally realize the symmetrical total coupling design of the integrated converter of the crisscross parallel magnetism of heterogeneous.
5. The method of construction of claim 1, wherein: a symmetrical integrated inductor adopting multi-phase inductor symmetrical end-to-end sequential coupling adopts a ring type end-to-end array structure, a basic matrix structure of the symmetrical integrated inductor is formed by sequentially connecting 1/2 NxN coupling magnetic core units end to end, the N-phase end-to-end sequential integrated inductor is formed by 2N array magnetic core units, N coupling magnetic core unit elements are arranged on the abscissa of the matrix inductor, and 1/2N coupling magnetic core unit elements are arranged on the ordinate.
6. The method of construction of claim 5, wherein: the improved matrix structure based on the basic matrix structure is as follows: the N-phase integrated inductor with symmetrical head-to-tail sequence is formed by connecting 2N coupling magnetic core units in a polygonal head-to-tail sequence, wherein the N coupling magnetic core units are positioned at the vertex position of an N-polygon to provide the inductance of each phase of inductor, the other N coupling magnetic core units are positioned at the middle position of a matrix to provide the mutual inductance of the multiphase coupling inductor to realize the adjustment of the coupling coefficient, in addition, the small coupling magnetic cores of the self-inductance unit and the mutual inductance unit can adjust the position in real time according to the structural requirements of the converter,
the coupling magnetic core units at the vertex positions adopt forward double-coupling windings, and the coupling magnetic core units at the middle positions of the matrix adopt reverse single-winding arrangement.
7. The construction method according to any one of claims 1 to 6, wherein: in the third step, the symmetrical integrated inductor and the forward coupling magnetic core units on the main diagonal all adopt single windings with the same inductance value to replace two forward coupling windings.
8. The construction method according to any one of claims 1 to 6, wherein: in the third step, the design implementation manner of the symmetrical integrated inductor is as follows: through a reverse deduction topology multiplexing principle, a traditional coupling inductance magnetic core and a winding are cut equivalently, a multi-scale analysis method that a physical magnetic field, an electric field and a circuit are combined and a magnetic circuit-circuit equivalent dual transformation model is fused is adopted, and therefore a mechanism and a symmetrical design rule that the integrated magnetic piece can eliminate direct current magnetic bias, freely adjust coupling degree and arbitrarily expand integrated phase number are found.
9. An integrated inductor constructed by the construction method of any one of claims 1 to 8, characterized in that: the self-inductance type transformer comprises a plurality of coupling magnetic core units, wherein the coupling inductance units comprise self-inductance units and mutual inductance units which are arranged in a staggered mode, forward coupling windings of the self-inductance units are sequentially connected in series to serve as main inductance, and reverse coupling windings of the mutual inductance units are sequentially connected in series to serve as mutual inductance.
10. The integrated inductor of claim 9, wherein: in the matrix structure, two phase windings on the diagonal coupling magnetic core units are wound in the forward direction, and the windings on the other coupling magnetic core units are wound in the reverse direction.
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| CN112613258A (en) * | 2020-12-15 | 2021-04-06 | 天津大学 | A Design Method of Coupling Inductor with Adjustable Coupling Coefficient |
| CN119885698A (en) * | 2025-03-31 | 2025-04-25 | 苏州元脑智能科技有限公司 | Method for determining inductance structure, storage medium, electronic device, and program product |
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| CN112613258B (en) * | 2020-12-15 | 2023-03-31 | 天津大学 | Coupling inductance design method with adjustable coupling coefficient |
| CN119885698A (en) * | 2025-03-31 | 2025-04-25 | 苏州元脑智能科技有限公司 | Method for determining inductance structure, storage medium, electronic device, and program product |
| CN120030811A (en) * | 2025-04-23 | 2025-05-23 | 浙江大学 | Transformer winding design method, PCB transformer and power module |
| CN120030811B (en) * | 2025-04-23 | 2025-07-04 | 浙江大学 | Transformer winding design method, PCB transformer and power module |
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