CN111223646A - Magnet yoke closed type multiphase symmetrical integrated magnetic part - Google Patents

Magnet yoke closed type multiphase symmetrical integrated magnetic part Download PDF

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CN111223646A
CN111223646A CN201811448149.0A CN201811448149A CN111223646A CN 111223646 A CN111223646 A CN 111223646A CN 201811448149 A CN201811448149 A CN 201811448149A CN 111223646 A CN111223646 A CN 111223646A
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magnetic
yoke
phase
columns
magnetic columns
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杨玉岗
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/255—Magnetic cores made from particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips

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  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

The invention provides an integrated magnetic piece with a magnetic yoke closed type multiphase structure and symmetrical parameters, and relates to the technical field of power electronic application. The winding comprises an iron core, a multi-phase primary winding and a multi-phase secondary winding: the iron core comprises a magnetic yoke, a plurality of main magnetic columns and auxiliary magnetic columns, wherein the magnetic yoke is of a closed symmetrical loop structure, one ends of the main magnetic columns are connected, the other ends of the main magnetic columns are respectively connected with the magnetic yoke, included angles among the main magnetic columns are equal, the auxiliary magnetic columns are symmetrically located among the main magnetic columns, and the main magnetic columns are symmetrically wound with multi-phase primary and secondary windings. The invention has the beneficial effects that: the magnetic coupling integration device is used for magnetic coupling integration of a multiphase inductor and a transformer in power conversion circuits of various non-isolated and isolated multiphase parallel switch power supplies, realizes structural symmetry and parameter equality of the multiphase magnetic integration inductor and the transformer, and realizes high-power output and automatic equalization of each phase current of the multiphase parallel switch power supplies.

Description

Magnet yoke closed type multiphase symmetrical integrated magnetic part
Technical Field
The invention relates to a multiphase integrated magnetic element, in particular to a magnetic yoke closed type multiphase structure and parameter symmetric integrated magnetic element (including multiphase structure and parameter symmetric transformers, coupled inductors, integrated magnetic elements of the transformers and the inductors) for various multiphase parallel power conversion circuits.
Technical Field
In recent years, switching power supplies for supplying electric energy to various electric devices are developing toward low voltage, large current, small size, light weight, high efficiency, thinning and integration, including voltage regulation modules for supplying precise power to high-precision and high-speed microprocessors such as a Central Processing Unit (CPU) and a Digital Signal Processor (DSP) of a computer, and switching power supplies widely used in fields such as electric vehicles, hybrid vehicles, uninterruptible power supplies, power quality regulation power supplies, aviation power supplies, solar photovoltaic power generation, renewable energy power generation, superconducting energy storage and the like and bidirectional switching power supplies requiring bidirectional flow of energy, which are developed in recent years, by adopting three-phase or more-phase non-isolated circuit topologies such as three-phase or multi-phase Buck, three-phase or multi-phase st, etc, The three-phase or multi-phase bidirectional Buck/Boost or the three-phase isolated circuit topological structure, such as three-phase LLC, three-phase LCC, three-phase forward, three-phase flyback, three-phase push-pull, three-phase half bridge and three-phase full bridge, is adopted, and the three-phase or multi-phase coupling inductor and the transformer are combined, so that the capacity of the switching power supply can be improved in multiples, the output current and power of the switching power supply can be increased, the capacity of a switching device can be reduced, input and output current ripples can be reduced, and the response speed can be improved.
However, the magnetic yokes of the existing three-phase or multi-phase integrated magnetic components (mainly including the coupling inductor and the transformer) are all non-closed structures, and the structures of all phases are asymmetric, for example, the one-line-shaped magnetic yoke of the EE-shaped iron core causes the three-phase or multi-phase inductance parameters of the magnetic yokes to be unequal, so that the branch currents of all phases in the circuit are unequal, the current in some branches is larger, the current in some branches is smaller, and when the asymmetry of the current of each branch is serious, the device in the branch with larger current is burnt out, and even the whole power supply equipment is damaged.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a multiphase integrated magnetic part (comprising a multiphase transformer and a multiphase coupling inductor) with a closed magnetic yoke and symmetrical structure and parameters, which aims to solve the problem that the current of each phase is unequal due to unequal inductance parameters of multiphase discrete magnetic parts (comprising the transformer and the inductor) or the structure of the multiphase integrated magnetic part in the conventional multiphase parallel switch power supply equipment, and realize the operation of the multiphase parallel switch power supply with high power, high transformation ratio, small volume, low current fluctuation, high response speed and bidirectional high efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a magnetic yoke closed type integrated magnetic piece with a multiphase structure and symmetrical parameters comprises an iron core, multiphase primary windings and secondary windings, wherein the iron core comprises a magnetic yoke, a plurality of main magnetic columns and a plurality of auxiliary magnetic columns; the magnetic yoke is of a closed symmetrical loop structure, the plurality of main magnetic columns are made of the same materials and structures and are equal in size, one ends of the plurality of main magnetic columns are connected, the other ends of the plurality of main magnetic columns are respectively connected with the magnetic yoke, included angles among the plurality of main magnetic columns are equal, and the included angles are equal to 360 degrees divided by the number of the main magnetic columns; the plurality of auxiliary magnetic columns are symmetrically positioned among the plurality of main magnetic columns, one end of each of the plurality of auxiliary magnetic columns is connected with one end of each of the plurality of main magnetic columns, and the other ends of the plurality of auxiliary magnetic columns are respectively connected with the magnetic yoke; the multi-phase primary winding and the multi-phase secondary winding are symmetrically wound on the plurality of main magnetic columns and are respectively connected into a multi-phase parallel circuit; the auxiliary magnetic columns are not provided with windings and are used as leakage magnetic flux paths of the primary windings and the secondary windings of the phases; the magnetic yoke, the main magnetic column and the auxiliary magnetic column can be made of ferromagnetic materials such as ferrite, silicon steel sheets, iron silicon, metal magnetic powder cores, amorphous and ultracrystalline materials, the coil can be made of metal materials such as copper, aluminum and silver with cylindrical, rectangular, trapezoidal or thin sheet-shaped outer insulating layers, single-stranded wires can be wound, and multi-stranded wires or litz wires (Lizi) can also be wound.
The invention has the beneficial effects that: the integrated magnetic piece with the closed magnet yoke type multiphase structure and the symmetric parameters can be used for the magnetic coupling integration of three-phase or multiphase inductors in various non-isolated multiphase parallel switch power supplies, such as three-phase or multiphase Buck circuits, Boost circuits, Buck/Boost circuits, Cuk circuits, Sepic circuits, Zata and other circuits, so that the structural symmetry and the equal parameters of the three-phase or multiphase magnetic integrated coupling inductors are realized; the magnetic coupling integration of the three-phase transformer and the magnetic coupling integration of the three-phase inductor in converter circuit topological structures such as a three-phase LLC (logic link control), a three-phase LCC (lower control logic), a three-phase forward excitation, a three-phase flyback, a three-phase push-pull, a three-phase half-bridge, a three-phase full bridge and the like can be used for power conversion circuits of various isolated multi-phase parallel switch power supplies, the magnetic coupling integration of the three-phase transformer and the three-phase magnetic coupling integration coupling inductor is realized, the structural symmetry and the parameter equality of the three-phase magnetic integration transformer and the three-phase magnetic coupling inductor are realized, the automatic balance of each phase current in the non-isolated and isolated three-phase or multi-phase parallel switch power supplies is finally realized, the coupling structure of an.
The following embodiments are described in detail with reference to the accompanying drawings.
Drawings
In order to more clearly explain the embodiments, the drawings to be used in the embodiments will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a top view of a three-phase transformer with circular ring-shaped magnetic yokes symmetrical in structure and parameters.
Fig. 2 is a top view of a three-phase transformer with structural and parametric symmetry for a hexagonal annular yoke of fig. 1.
Fig. 3 is a top view of a three-phase coupled inductor with structural and parametric symmetry of a circular ring yoke of fig. 1.
Fig. 4 is a top view of a three-phase coupled inductor with structural and parametric symmetry of a circular magnetic yoke of fig. 3 with three auxiliary magnetic pillars removed.
Fig. 5 is a top view of a three-phase coupled inductor with structural and parametric symmetry of the annular magnetic yoke with an air gap of fig. 3.
Fig. 6 is a top view of a three-phase coupled inductor with structural and parametric symmetry for the regular hexagonal ring yoke with air gaps of fig. 5.
Fig. 7 is a top view of a four-phase transformer with structural and parametric symmetry for a square annular yoke of fig. 1.
Fig. 8 is a three-dimensional block diagram of a three-phase coupled inductor of fig. 1 having structural and parametric symmetry with two circular ring-shaped yokes and three auxiliary magnetic columns.
Fig. 9 is a three-dimensional structural view of a three-phase coupled inductor of fig. 8 having structural and parametric symmetry with two disc-shaped yokes and one auxiliary magnetic column.
In the figure, 1-circular ring-shaped magnetic yoke; 2-main magnetic pole; 3-primary winding of transformer; 4-secondary winding of transformer; 5-auxiliary magnetic column; 6-a regular hexagonal annular magnetic yoke; 7-an air gap between the main magnetic column and the circular magnetic yoke; 7-1-an air gap between the main magnetic column and the regular hexagonal annular magnetic yoke; 8-air gap between the auxiliary magnetic column and the circular magnetic yoke; 8-1-air gap between auxiliary magnetic column and regular hexagon ring magnetic yoke; 9-square magnetic yoke; 1-1-circular lower magnetic yoke; 1-2-circular upper magnetic yoke; 1-3-disc shaped lower yoke; 1-4-disc shaped upper yoke; n is a radical of11、N21、N31、N41The number of turns of the primary winding 3 of each phase of the transformer, N11＝N21＝N31＝N41；N12、N22、N32、N42The number of turns of the secondary winding 4 of each phase of the transformer, N12＝N22＝N32＝N42；N1、N2、N3Number of winding turns of each phase of the coupled inductor, N1＝N2＝N3。
Detailed Description
The core idea of the invention is that a closed magnetic yoke structure is adopted to realize the structural symmetry and parameter equality of the multiphase integrated magnetic part. The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the core idea and embodiments of the present invention, those skilled in the art can obtain other embodiments without creative efforts, which all belong to the protection scope of the present invention.
In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention, but it will be apparent to one skilled in the art that the invention may be practiced without these specific details.
The first embodiment is as follows:
referring to the attached drawing 1, in order to solve the problem of unequal inductance parameters of a three-phase transformer, a magnetic integrated transformer with a closed-yoke three-phase structure and symmetrical inductance parameters is provided, which is composed of an iron core and three-phase primary and secondary windings, and is characterized in that the iron core is composed of a magnetic yoke 1, three main magnetic columns 2 and three auxiliary magnetic columns 5; the magnetic yoke 1 is annular, the three main magnetic columns 2 are made of the same materials and structures and are equal in size, one ends of the three main magnetic columns 2 are connected, the other ends of the three main magnetic columns 2 are respectively connected with the magnetic yoke 1, and included angles among the three main magnetic columns 2 are equal and are all 120 degrees; the three auxiliary magnetic columns 5 are symmetrically positioned among the three main magnetic columns 2, one end of each of the three auxiliary magnetic columns 5 is connected with one end of each of the three main magnetic columns 2, and the other ends of the three auxiliary magnetic columns 5 are respectively connected with the magnetic yoke 1; the three-phase primary winding 3 and the three-phase secondary winding 4 are symmetrically wound on the three main magnetic columns 2, and the three-phase primary winding 3 and the three-phase secondary winding 4 are respectively connected into a three-phase parallel circuit; the three auxiliary magnetic columns 5 are not provided with windings, and the three auxiliary magnetic columns 5 are used as leakage flux paths of the three-phase primary winding 3 and the three-phase secondary winding 4.
Example two:
referring to the attached drawing 2, the three-phase transformer with symmetrical structure and parameters is characterized in that a circular magnetic yoke 1 in the first embodiment is changed into a regular hexagonal annular magnetic yoke 6, one end of each of three main magnetic columns 2 is connected, the other ends of the three main magnetic columns 2 are respectively connected to the central positions of three sides of the regular hexagonal annular magnetic yoke, the three sides of the regular hexagonal annular magnetic yoke are spaced in pairs, one end of each of three auxiliary magnetic columns is connected with one end of each of the three main magnetic columns, and the other ends of the three auxiliary magnetic columns are respectively and symmetrically connected to the central positions of the other three sides of the regular hexagonal annular magnetic yoke, the three sides of the regular hexagonal annular magnetic yoke are spaced in pairs.
Example three:
referring to fig. 3, the secondary windings 4 of the respective phases in embodiment 1 are removed to form a coupled inductor having a three-phase structure and symmetrical parameters.
Example four:
referring to fig. 4, three auxiliary magnetic columns 5 in the third embodiment are removed, and a three-phase structure and parameter symmetric coupled inductor is formed.
Example five:
referring to fig. 5, three air gaps 7 having the same shape and size are respectively formed between the three main magnetic pillars 2 and the circular ring-shaped magnetic yoke 1 in the third embodiment, and three air gaps 8 having the same shape and size are respectively formed between the three auxiliary magnetic pillars 5 and the circular ring-shaped magnetic yoke 1 in the third embodiment.
Example six:
referring to fig. 6, the circular magnetic yoke 1 in the fifth embodiment is changed to a regular hexagonal annular magnetic yoke 6, three air gaps 7-1 with the same shape and size are respectively formed between the three main magnetic columns 2 and the regular hexagonal annular magnetic yoke 6, and three air gaps 8-1 with the same shape and size are respectively formed between the three auxiliary magnetic columns 5 and the regular hexagonal annular magnetic yoke 6.
Example seven:
referring to fig. 7, the circular magnetic yoke 1 in embodiment 1 is changed into a square circular magnetic yoke 9, the number of the main magnetic poles 2 is increased from three to four, the included angles between the four main magnetic poles 2 are all 90 °, and the number of the primary winding 3 and the secondary winding 4 is increased from three to four.
Example eight:
referring to the attached figure 8, the number of the circular magnetic yokes 1 in the fourth embodiment is increased from one to two, namely a circular lower magnetic yoke 1-1 and a circular upper magnetic yoke 1-2, the circular upper magnetic yoke 1-2 is arranged right above the circular lower magnetic yoke 1-1, the three main magnetic columns 2 are vertically and symmetrically arranged between the two magnetic yokes 1-1 and 1-2, and the three auxiliary magnetic columns 5 are symmetrically arranged between the three main magnetic columns 2.
Example nine:
referring to fig. 9, two circular ring-shaped magnetic yokes 1-1 and 1-2 in the eighth embodiment are changed into disc-shaped magnetic yokes 1-3 and 1-4, the number of auxiliary magnetic columns 5 is reduced from three to one, and the one auxiliary magnetic column 5 is disposed at the center position of the two disc-shaped magnetic yokes 1-3 and 1-4.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. The present specification has applied the above embodiments to explain the principle and the implementation of the present invention, and the above embodiments are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific implementation and the application range may be changed, for example, the circular ring-shaped magnetic yoke in the fifth and eighth embodiments may be replaced by a regular hexagonal ring-shaped magnetic yoke; for another example, the cylindrical main magnetic pillar and the auxiliary magnetic pillar in the eighth and ninth embodiments may be replaced by square magnetic pillars; alternatively, the disk-shaped yoke in the ninth embodiment is replaced with a yoke of a symmetrical structure of another shape. Therefore, the content of the present specification should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like, which are made within the spirit and principle of the present invention, are included in the scope of the present invention.

Claims (10)

1. The utility model provides an integrated magnetism spare of heterogeneous structure of yoke closed type and parameter symmetry, includes iron core and heterogeneous former, secondary winding, its characterized in that: the iron core comprises a magnetic yoke, a plurality of main magnetic columns and a plurality of auxiliary magnetic columns; the magnetic yoke is in a closed symmetrical loop structure; the magnetic pole comprises a plurality of main magnetic poles, a yoke and a plurality of magnetic poles, wherein the plurality of main magnetic poles are made of the same material and structure and have the same size, one ends of the plurality of main magnetic poles are connected, the other ends of the plurality of main magnetic poles are respectively connected with the yoke, included angles among the plurality of main magnetic poles are equal, and the size of the included angle is equal to 360 degrees divided by the number of the main magnetic poles; the plurality of auxiliary magnetic columns are symmetrically positioned among the plurality of main magnetic columns, one end of each of the plurality of auxiliary magnetic columns is connected with one end of each of the plurality of main magnetic columns, and the other ends of the plurality of auxiliary magnetic columns are respectively connected with the magnetic yoke; the multi-phase primary winding and the multi-phase secondary winding are symmetrically wound on the plurality of main magnetic columns and are respectively connected into a multi-phase parallel circuit; the plurality of auxiliary magnetic columns are not provided with windings and are used as leakage flux paths of the multi-phase primary winding and the multi-phase secondary winding.
2. The yoke-closed multiphase structure and parameter symmetric integrated magnetic part of claim 1, wherein: the phase number of the symmetrical multi-phase integrated magnetic piece is three-phase, the magnetic yoke is in a ring shape, the number of the main magnetic columns and the number of the auxiliary magnetic columns are three, the primary and secondary windings are three-phase, included angles between the three main magnetic columns are 120 degrees, included angles between the three auxiliary magnetic columns are also 120 degrees, and a three-phase structure of the ring-shaped magnetic yoke and a magnetic integrated transformer with symmetrical parameters are formed.
3. A yoke-closed three-phase structurally and parametrically symmetric magnetic integrated transformer according to claim 2, characterized in that: the magnetic yoke is in a regular hexagon ring shape, one end of each of the three main magnetic columns is connected, the other ends of the three main magnetic columns are symmetrically connected to the central positions of the three sides of the regular hexagon ring-shaped magnetic yoke, the three sides of the regular hexagon ring-shaped magnetic yoke are spaced in pairs, one end of each of the three auxiliary magnetic columns is connected to one end of each of the three main magnetic columns, and the other ends of the three auxiliary magnetic columns are symmetrically connected to the central positions of the other three sides of the regular hexagon ring-shaped magnetic yoke, the other three sides of the regular hexagon ring-shaped magnetic yoke are spaced in pairs.
4. The integrated magnetic piece of yoke-closed three-phase structure and parameter symmetry according to claim 2, characterized in that: and removing the secondary side windings of all the phases to form the coupled inductor with a three-phase structure and symmetrical parameters.
5. The yoke-closed three-phase structurally and parametrically symmetric coupled inductor of claim 4, wherein: three auxiliary magnetic columns are removed to form the coupled inductor with three-phase structure and symmetrical parameters.
6. The yoke-closed three-phase structurally and parametrically symmetric coupled inductor of claim 4, wherein: three air gaps with the same shape and size are respectively formed between the three main magnetic columns and the circular magnetic yoke, and three air gaps with the same shape and size are respectively formed between the three auxiliary magnetic columns and the circular magnetic yoke.
7. The yoke-closed three-phase structurally and parametrically symmetric coupled inductor of claim 6, wherein: the magnetic yoke is in a regular hexagonal ring shape, three air gaps with the same shape and size are formed between the three main magnetic columns and the regular hexagonal ring magnetic yoke respectively, and three air gaps with the same shape and size are formed between the three auxiliary magnetic columns and the regular hexagonal ring magnetic yoke respectively.
8. The yoke-closed multiphase symmetric integrated magnetic member of claim 1, wherein: the phase number of the symmetrical integrated magnetic pieces is four, the magnetic yoke is a square ring, the number of the main magnetic columns is four, the primary winding and the secondary winding are four phases, included angles among the four main magnetic columns are 90 degrees, and a four-phase magnetic integrated transformer with symmetrical structure and parameters is formed.
9. The yoke-closed three-phase structurally and parametrically symmetric coupled inductor of claim 5, wherein: the number of the magnetic yokes is increased from one to two, the second magnetic yoke is arranged right above the first magnetic yoke, the three main magnetic columns and the three auxiliary magnetic columns are respectively vertically and symmetrically arranged between the two magnetic yokes, and the three auxiliary magnetic columns are symmetrically arranged between the three main magnetic columns.
10. The yoke-closed three-phase structurally and parametrically symmetric coupled inductor of claim 9, wherein: the two circular magnetic yokes are changed into disc-shaped magnetic yokes, the number of the auxiliary magnetic columns is reduced from three to one, and the auxiliary magnetic columns are arranged at the central positions of the two disc-shaped magnetic yokes.
CN201811448149.0A 2018-11-23 2018-11-23 Magnet yoke closed type multiphase symmetrical integrated magnetic part Pending CN111223646A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113556044A (en) * 2021-08-03 2021-10-26 洛阳Lyc轴承有限公司 Connection method of alternating current 90-degree phase difference circuit for magnetic particle flaw detector
WO2022225498A1 (en) * 2021-04-19 2022-10-27 Леонид Адамович БИЛЫЙ Three-phase transformer
JP7431406B2 (en) 2022-06-06 2024-02-15 Ｃｋｓ株式会社 Three-phase common mode choke coil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022225498A1 (en) * 2021-04-19 2022-10-27 Леонид Адамович БИЛЫЙ Three-phase transformer
CN113556044A (en) * 2021-08-03 2021-10-26 洛阳Lyc轴承有限公司 Connection method of alternating current 90-degree phase difference circuit for magnetic particle flaw detector
CN113556044B (en) * 2021-08-03 2024-04-26 洛阳轴承集团股份有限公司 Connection method of alternating current 90-degree phase difference circuit for magnetic particle inspection machine
JP7431406B2 (en) 2022-06-06 2024-02-15 Ｃｋｓ株式会社 Three-phase common mode choke coil

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