CN114400138A - Multi-magnetic-core combined connecting structure of three-phase high-frequency transformer - Google Patents

Multi-magnetic-core combined connecting structure of three-phase high-frequency transformer Download PDF

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Publication number
CN114400138A
CN114400138A CN202210168631.9A CN202210168631A CN114400138A CN 114400138 A CN114400138 A CN 114400138A CN 202210168631 A CN202210168631 A CN 202210168631A CN 114400138 A CN114400138 A CN 114400138A
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China
Prior art keywords
coil
terminal
phase
electrically connected
magnetic core
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Chinese (zh)
Inventor
陈俊裕
吴志雄
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Shenzhen Yamaxi Electronics Co ltd
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Shenzhen Yamaxi Electronics Co ltd
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Priority to CN202210168631.9A priority Critical patent/CN114400138A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • 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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

The invention discloses a multi-magnetic core combination connecting structure of a three-phase high-frequency transformer, belonging to the technical field of multi-magnetic core combination connecting structures, wherein each E-shaped magnetic core is wound with three groups of A/B/C coils, and A/B/C three-phase magnetic flux passes through the same magnetic core with a phase difference of 120 degrees, so that the phase and the phase are not only in electrical connection but also in magnetic connection.

Description

Multi-magnetic-core combined connecting structure of three-phase high-frequency transformer
Technical Field
The invention relates to a multi-magnetic-core combined connecting structure, in particular to a multi-magnetic-core combined connecting structure of a three-phase high-frequency transformer, and belongs to the technical field of multi-magnetic-core combined connecting structures.
Background
In the high-frequency magnetic component, when the transformer needs to be made into three phases and has larger capacity or special requirements on the external dimension, a plurality of groups of coils and magnetic cores are required to be combined and connected into a three-phase transformer, the general method is to respectively manufacture three independent single-phase transformers, and then combine and connect into the required three-phase transformer according to different connection methods, such as YyO connection method in the specification of figure 1 and figure 2;
the prior art has the following problems:
1. each magnetic core is wound with a single group of coils, the A/B/C three-phase magnetic circuits are relatively independent, and the phases are only electrically connected without magnetic connection;
2. once one phase of the circuit fails, the other two phases of the circuit are severely unbalanced, and the circuit system is damaged secondarily;
3. the coil is wound only on the center pillar of the magnetic core, so that the space utilization rate is low, and the size of the transformer is large;
therefore, the multi-magnetic core combined connecting structure of the three-phase high-frequency transformer is designed to optimize the problems.
Disclosure of Invention
The invention mainly aims to provide a multi-magnetic-core combined connecting structure of a three-phase high-frequency transformer, each E-shaped magnetic core is wound with three groups of A/B/C coils, and A/B/C three-phase magnetic flux passes through the same magnetic core with a phase difference of 120 degrees, so that the phase and the phase are in electrical connection and magnetic connection;
because of the magnetic connection among phases, even if one phase of load in the circuit has short-circuit fault, the magnetic fields in the transformer can mutually hinder the current mutation, and the other two phases can not be seriously unbalanced, thereby reducing the risk of secondary damage to a circuit system;
coils are wound on the middle column and the side column of the magnetic core, so that the space utilization rate is high, and the power density of the transformer is improved;
can be connected according to different requirements of Yy, Yd, Dy and the like, and the connection method is flexible and variable.
The purpose of the invention can be achieved by adopting the following technical scheme:
a multi-magnetic-core combined connecting structure of a three-phase high-frequency transformer comprises a first E-shaped magnetic core of the three-phase transformer, a second E-shaped magnetic core of the three-phase transformer and a third E-shaped magnetic core of the three-phase transformer;
n14 coils, N15 coils, N16 coils, N24 coils, N25 coils, N26 coils, N34 coils, N35 coils and N36 coils are wound above the side columns and the center columns of the first three-phase transformer E-shaped magnetic core, the second three-phase transformer E-shaped magnetic core and the third three-phase transformer E-shaped magnetic core;
n11 coils, N12 coils, N13 coils, N21 coils, N22 coils, N23 coils, N31 coils, N32 coils and N33 coils are wound below the side columns and the center columns of the first three-phase transformer E-shaped magnetic core, the second three-phase transformer E-shaped magnetic core and the third three-phase transformer E-shaped magnetic core;
and the primary side coils of the first three-phase transformer E-shaped magnetic core, the second three-phase transformer E-shaped magnetic core and the third three-phase transformer E-shaped magnetic core are electrically connected with each other to form a YyO, Yy, Yd or Dy electric connection structure.
Preferably, the terminal 2 of the coil N14 is electrically connected to the terminal 1 of the coil N25;
the terminal N15 of coil 2 is electrically connected with the terminal 1 of coil N26;
the 2 terminal of the N16 coil is electrically connected to the 1 terminal of the N24 coil.
Preferably, the 2 terminal of the N24 coil is electrically connected to the 1 terminal of the N35 coil;
the 2 terminal of the N25 coil is electrically connected with the 1 terminal of the N36 coil;
the 2 terminal of the N26 coil is electrically connected to the 1 terminal of the N34 coil.
Preferably, the 2 terminals of the N34 coil, the N35 coil and the N36 coil are electrically connected to each other.
Preferably, the 2 terminal of the N11 coil is electrically connected to the 1 terminal of the N22 coil;
the 2 terminal of the N12 coil is electrically connected with the 1 terminal of the N23 coil;
the 2 terminal of the N13 coil is electrically connected to the 1 terminal of the N21 coil.
Preferably, terminal 2 of the N21 coil is electrically connected to terminal 2 of the N32 coil;
the 2 terminal of the N22 coil is electrically connected with the 2 terminal of the N33 coil;
the 2 terminal of the N23 coil is electrically connected to the 2 terminal of the N31 coil.
Preferably, the 1-terminal of the N31 coil, the N32 coil, and the N33 coil are electrically connected to each other.
The invention has the beneficial technical effects that:
according to the multi-magnetic-core combined connecting structure of the three-phase high-frequency transformer, each E-shaped magnetic core is wound with the A/B/C three groups of coils, and A/B/C three-phase magnetic flux passes through the same magnetic core with a phase difference of 120 degrees, so that the phase and the phase are in electrical connection and magnetic connection;
because of the magnetic connection among phases, even if one phase of load in the circuit has short-circuit fault, the magnetic fields in the transformer can mutually hinder the current mutation, and the other two phases can not be seriously unbalanced, thereby reducing the risk of secondary damage to a circuit system;
coils are wound on the middle column and the side column of the magnetic core, so that the space utilization rate is high, and the power density of the transformer is improved;
can be connected according to different requirements of Yy, Yd, Dy and the like, and the connection method is flexible and variable.
Drawings
FIG. 1 is a prior art three-phase transformer connection diagram;
FIG. 2 is a prior art electrical schematic;
FIG. 3 is a circuit diagram of a multi-core combination YyO connection for a three-phase high-frequency transformer according to a preferred embodiment of the present invention;
FIG. 4 is a simplified electrical schematic diagram of a multi-core combination YyO connection method for a three-phase high-frequency transformer according to a preferred embodiment of the present invention;
FIG. 5 is a simplified electrical schematic diagram of a multi-core Yy connection of a three-phase high-frequency transformer according to a preferred embodiment of the present invention;
FIG. 6 is a simplified electrical schematic diagram of a multi-core combination Yd connection of a three-phase high-frequency transformer according to a preferred embodiment of the present invention;
fig. 7 is a simplified electrical schematic diagram of a multi-core Dy connection of a three-phase high-frequency transformer according to a preferred embodiment of the present invention.
In the figure: 1-three-phase transformer E type magnetic core one, 2-three-phase transformer E type magnetic core two, 3-three-phase transformer E type magnetic core three.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 3-7, the multi-core combined connection structure of a three-phase high-frequency transformer provided in this embodiment includes a first three-phase transformer E-shaped core 1, a second three-phase transformer E-shaped core 2, and a third three-phase transformer E-shaped core 3;
n14, N15, N16, N24, N25, N26, N34, N35 and N36 coils are wound above the side columns and the center columns of the three-phase transformer E-shaped core I1, the three-phase transformer E-shaped core II 2 and the three-phase transformer E-shaped core III 3;
n11, N12, N13, N21, N22, N23, N31, N32 and N33 coils are wound below the side columns and the center columns of the three-phase transformer E-shaped core I1, the three-phase transformer E-shaped core II 2 and the three-phase transformer E-shaped core III 3;
and the primary windings on the first three-phase transformer E-shaped magnetic core 1, the second three-phase transformer E-shaped magnetic core 2 and the third three-phase transformer E-shaped magnetic core 3 are electrically connected with each other to form a YyO, Yy, Yd or Dy electric connection structure.
The winding is carried out on the middle column of the E-shaped magnetic core (the sectional area of the middle column is 2 times of that of the side column), the coil is wound on the side column, the winding space of the side column is utilized, the A/B/C three-phase coils are distributed on each group of magnetic cores, so that the phases are in electrical connection and magnetic connection, and finally the coils are connected according to different connection methods such as Yy, Yd and Dy to obtain the required three-phase transformer, and the connection method is variable and flexible.
Coils are respectively wound on the center pillar and the side pillar of the E-shaped magnetic core (the sectional area of the center pillar is 2 times of that of the side pillar), the number of the coils on the center pillar and the side pillar on the primary side is consistent, and the number of the coils on the center pillar and the side pillar on the secondary side is consistent.
In the present embodiment, the terminal N14, coil 2, is electrically connected to the terminal 1 of the coil N25;
the terminal N15 of coil 2 is electrically connected with the terminal 1 of coil N26;
the 2 terminal of the N16 coil is electrically connected to the 1 terminal of the N24 coil.
In the present embodiment, terminal 2 of the N24 coil is electrically connected to terminal 1 of the N35 coil;
the 2 terminal of the N25 coil is electrically connected with the 1 terminal of the N36 coil;
the 2 terminal of the N26 coil is electrically connected to the 1 terminal of the N34 coil.
In the present embodiment, the 2-terminal of the N34 coil, the N35 coil, and the N36 coil are electrically connected to each other.
In the present embodiment, terminal 2 of the N11 coil is electrically connected to terminal 1 of the N22 coil;
the 2 terminal of the N12 coil is electrically connected with the 1 terminal of the N23 coil;
the 2 terminal of the N13 coil is electrically connected to the 1 terminal of the N21 coil.
In the present embodiment, terminal 2 of the N21 coil is electrically connected to terminal 2 of the N32 coil;
the 2 terminal of the N22 coil is electrically connected with the 2 terminal of the N33 coil;
the 2 terminal of the N23 coil is electrically connected to the 2 terminal of the N31 coil.
In the present embodiment, the 1-terminal of the N31 coil, the N32 coil, and the N33 coil are electrically connected to each other.
And connecting the magnetic cores and the coils according to different connection methods to obtain the required transformer, as shown in the second figure.
Taking the YyO connection as an example, as shown in fig. three, let:
n1 generated a potential of F1,
n2 generated a potential of E2,
n3 generated a potential of E3,
the primary side phase a voltage (P1-N) is UA,
the primary side phase B voltage (P2-N) is UB,
the primary side C-phase voltage (P3-N) is UC,
the phase voltage of the secondary side phase A (S1-n) is Ua,
the secondary side B phase voltage (S2-n) is Ub,
the secondary side C phase voltage (S3-n) is Uc,
the coil N1 of the primary side group one is connected with the N2 of the group two and the N3 of the group three to form an a phase, the cross section area of a side column of the magnetic core is 1/2 of a center column, and the electric potential generated by the N1 and the N3 is 1/2 of N2, namely, F1 is equal to E3 is equal to E2/2, so that the final phase voltage UA of the primary side a phase is 2 times of the electromotive force E2 generated by the N2, namely UA is equal to 2E2 is equal to 4E1 is equal to 4E3, and similarly, UB is equal to UC is equal to 2E2 is equal to 4E1 is equal to 4E 3.
Similarly, the minor side has Ua ═ Ub ═ Uc.
The above are only further embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its concept within the scope of the present invention.

Claims (7)

1. The utility model provides a many magnet cores of three-phase high frequency transformer combination connection structure which characterized in that: the transformer comprises a three-phase transformer E-shaped magnetic core I (1), a three-phase transformer E-shaped magnetic core II (2) and a three-phase transformer E-shaped magnetic core III (3);
n14, N15, N16, N24, N25, N26, N34, N35 and N36 coils are wound above the side columns and the center columns of the three-phase transformer E-shaped magnetic core I (1), the three-phase transformer E-shaped magnetic core II (2) and the three-phase transformer E-shaped magnetic core III (3);
n11, N12, N13, N21, N22, N23, N31, N32 and N33 coils are wound below the side columns and the center columns of the three-phase transformer E-shaped magnetic core I (1), the three-phase transformer E-shaped magnetic core II (2) and the three-phase transformer E-shaped magnetic core III (3);
the three-phase transformer E-shaped magnetic core I (1), the three-phase transformer E-shaped magnetic core II (2) and the secondary side coil on the three-phase transformer E-shaped magnetic core III (3) are electrically connected with each other, and the three-phase transformer E-shaped magnetic core I (1), the three-phase transformer E-shaped magnetic core II (2) and the primary side coil on the three-phase transformer E-shaped magnetic core III (3) are electrically connected with each other to form a YyO, Yy, Yd or Dy electric connection structure.
2. The multi-core combined connecting structure of the three-phase high-frequency transformer according to claim 1, characterized in that: the terminal N14 of coil 2 is electrically connected with the terminal 1 of coil N25;
the terminal N15 of coil 2 is electrically connected with the terminal 1 of coil N26;
the 2 terminal of the N16 coil is electrically connected to the 1 terminal of the N24 coil.
3. The multi-core combined connecting structure of the three-phase high-frequency transformer according to claim 2, characterized in that: the 2 terminal of the N24 coil is electrically connected with the 1 terminal of the N35 coil;
the 2 terminal of the N25 coil is electrically connected with the 1 terminal of the N36 coil;
the 2 terminal of the N26 coil is electrically connected to the 1 terminal of the N34 coil.
4. The multi-core combined connection structure of the three-phase high-frequency transformer according to claim 3, characterized in that: the 2-terminal of the N34 coil, the N35 coil, and the N36 coil are electrically connected to each other.
5. The multi-core combined connecting structure of the three-phase high-frequency transformer according to claim 4, characterized in that: the 2 terminal of the N11 coil is electrically connected with the 1 terminal of the N22 coil;
the 2 terminal of the N12 coil is electrically connected with the 1 terminal of the N23 coil;
the 2 terminal of the N13 coil is electrically connected to the 1 terminal of the N21 coil.
6. The multi-core combined connecting structure of the three-phase high-frequency transformer according to claim 5, characterized in that: the 2 terminal of the N21 coil is electrically connected with the 2 terminal of the N32 coil;
the 2 terminal of the N22 coil is electrically connected with the 2 terminal of the N33 coil;
the 2 terminal of the N23 coil is electrically connected to the 2 terminal of the N31 coil.
7. The multi-core combined connecting structure of the three-phase high-frequency transformer according to claim 6, characterized in that: the 1 terminals of the N31 coil, the N32 coil, and the N33 coil are electrically connected to each other.
CN202210168631.9A 2022-02-23 2022-02-23 Multi-magnetic-core combined connecting structure of three-phase high-frequency transformer Pending CN114400138A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210168631.9A CN114400138A (en) 2022-02-23 2022-02-23 Multi-magnetic-core combined connecting structure of three-phase high-frequency transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210168631.9A CN114400138A (en) 2022-02-23 2022-02-23 Multi-magnetic-core combined connecting structure of three-phase high-frequency transformer

Publications (1)

Publication Number Publication Date
CN114400138A true CN114400138A (en) 2022-04-26

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Application Number Title Priority Date Filing Date
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Country Status (1)

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