Energy storage transformer integrated with LLC inductor

Abstract

The utility model relates to the technical field of transformers, in particular to an energy storage transformer integrated with an LLC inductor, which comprises a main magnetic core, an auxiliary magnetic core, a transformer coil and an LLC inductor coil. The main magnetic core comprises a first main magnetic core and a second main magnetic core which abut against each other, the transformer coil is wound between the first main magnetic core and the second main magnetic core, the auxiliary magnetic core abuts against the first main magnetic core or the second main magnetic core, the LLC inductance coil is wound on the auxiliary magnetic core, and the LLC inductance coil is connected with the transformer coil. The main magnetic core and the transformer coil form the transformer part, then the LLC inductance coil is wound on the auxiliary magnetic core, and the auxiliary magnetic core abuts against the first main magnetic core or the second main magnetic core to form the LLC inductance part, so that the LLC inductance part is integrated on the energy storage transformer body, and the space occupied by the LLC resonance topological structure is reduced. According to the invention, the circuit structure can be designed in a more miniaturized manner.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to an energy storage transformer with integrated LLC inductor. Background Art

[0002] LLC energy storage transformer is a specially designed energy storage transformer that adopts LLC resonant topology. LLC resonant topology is a series resonant converter that can effectively reduce switching losses, improve efficiency, and is suitable for high-frequency conversion. LLC energy storage transformer is usually used in energy storage systems, such as battery energy storage systems, supercapacitor energy storage systems, etc. It can realize the storage, conversion and release of electric energy, improve energy utilization efficiency, and reduce energy loss.

[0003] At present, LLC resonant topology consists of inductors, capacitors and magnetic components, usually located on the DC side of the energy storage transformer, used to convert the stored DC power into the required AC power and output it to the load or grid. It can achieve high-efficiency, high-frequency power conversion, and can achieve a wide range of output voltage regulation and stability.

[0004] With respect to the above-mentioned related technologies, in the circuit elements, setting the LLC resonant topology structure and the transformer body separately requires a larger space, which is not convenient for miniaturized design of the circuit structure. Utility Model Content

[0005] In order to reduce the space occupied by the LLC resonant topology structure and enable the circuit structure to be designed to be more miniaturized, the present application provides an energy storage transformer with an integrated LLC inductor.

[0006] The energy storage transformer with integrated LLC inductor provided in the present application adopts the following technical solution:

[0007] An energy storage transformer with integrated LLC inductor, comprising:

[0008] The main magnetic core comprises a first main magnetic core and a second main magnetic core abutting against each other;

[0009] A secondary magnetic core, the secondary magnetic core abutting against the first main magnetic core or the second main magnetic core;

[0010] A transformer coil, wound between the first main magnetic core and the second main magnetic core;

[0011] The LLC inductor is wound on the secondary magnetic core, and the LLC inductor is connected to the transformer coil.

[0012] By adopting the above technical solution, a closed magnetic circuit is formed by utilizing the first main magnetic core and the second main magnetic core between the main magnetic cores to wind the transformer coil between the first main magnetic core and the second main magnetic core to form the transformer main body, and then the LLC inductor coil is wound on the auxiliary magnetic core, and the auxiliary magnetic core is made to abut against the first main magnetic core or the second main magnetic core to form the LLC inductor part, thereby integrating the LLC inductor part on the energy storage transformer body, thereby reducing the space occupied by the LLC resonant topology structure, so that the circuit structure can be designed to be more miniaturized.

[0013] Optionally, the first main magnetic core includes a first main magnet, a first middle column, and a first side column, wherein the first middle column and the first side column are fixedly connected to the same side of the first main magnet, and two first side columns are provided, and the first middle column is located in the middle of the two first side columns;

[0014] The second main magnetic core includes a second main magnet, a second center column, and a second side column. The second center column and the second side column are fixedly connected on the same side of the second main magnet, and two second side columns are provided. The second center column is located in the middle of the two second side columns. The first center column is coaxially abutted with the second center column, and the first side column is abutted with the second side column. The transformer coil is wound on the coaxially abutted first center column and the second center column.

[0015] By adopting the above technical solution, the transformer coil is sleeved on the first middle column and the second middle column by utilizing the cooperation of the first main magnet, the first middle column, the first side column, the second main magnet, the second middle column and the second side column, thereby completing the main part of the transformer.

[0016] Optionally, both the first main magnet and the second main magnet are provided with demagnetizing grooves.

[0017] By adopting the above technical solution, the provision of the demagnetizing groove not only reduces the material and weight of the first main magnet and the second main magnet, but also reduces the magnetic loss on the first main magnet and the second main magnet.

[0018] Optionally, the secondary magnetic core includes a secondary magnet, a secondary center column and a secondary side column, the secondary center column and the secondary side column are fixedly connected on the same side of the secondary main magnet, and two secondary side columns are provided, the secondary center column is located in the middle of the two secondary side columns, the secondary center column abuts against the first center column, and the secondary side column abuts against the side of the first main magnet away from the first center column, or abuts against the side of the second main magnet away from the second center column.

[0019] By adopting the above technical solution, the LLC inductor coil is fixed on one side of the main magnetic core by utilizing the cooperation of the secondary magnet, the secondary middle column and the secondary side column, so that the LLC inductor is integrated on the transformer body.

[0020] Optionally, there are multiple transformer coils and multiple LLC inductor coils, and the transformer coils are connected to the LLC inductor coils in a one-to-one manner. There are multiple first center columns, second center columns and sub-center columns, and the first center columns and the second center columns are inserted in the transformer coils in a one-to-one manner, and the sub-center columns are inserted in the LLC inductor coils in a one-to-one manner.

[0021] By adopting the above technical solution, a plurality of transformer coils and LLC inductor coils are coordinated to achieve a higher voltage output.

[0022] Optionally, two of each of the first side pillars, the second side pillars and the secondary side pillars are provided, a plurality of the first middle pillars are provided between the two first side pillars, a plurality of the second middle pillars are provided between the two second side pillars, and a plurality of the secondary middle pillars are provided between the two secondary side pillars.

[0023] By adopting the above technical solution, only two first side poles and two second side poles are arranged to abut against each other, thereby forming a closed-loop magnetic circuit, reducing the magnetic loss caused by arranging the first side pole in the middle of each first middle pole. Similarly, the two secondary side poles are abutted against the first main magnet or the second main magnet to form a closed-loop magnetic circuit, and at the same time, the magnetic loss caused by arranging the secondary side pole in the middle of each secondary middle pole is also reduced.

[0024] Optionally, the first main magnetic core, the second main magnetic core and the auxiliary magnetic core have the same structure.

[0025] By adopting the above technical solution, the structures of the first main magnetic core, the second main magnetic core and the auxiliary magnetic core are set to be consistent, which is convenient for manufacturing and also convenient for installation without distinguishing them.

[0026] Optionally, a mounting plate is installed on one side of the main magnetic core, and a plurality of pins are provided on a side of the mounting plate away from the main magnetic core, and both the transformer coil and the LLC inductor coil are electrically connected to the pins.

[0027] By adopting the above technical solution, the arrangement of the mounting plate and the pins facilitates the installation of the transformer.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. Through the coordination of the main magnetic core, the first main magnetic core, the second main magnetic core, the auxiliary magnetic core, the transformer coil and the LLC inductor coil, the LLC inductor part is integrated on the energy storage transformer body, which reduces the space occupied by the LLC resonant topology structure, thereby enabling the circuit structure to be designed in a more miniaturized manner;

[0030] 2. By providing demagnetizing grooves on both the first main magnet and the second main magnet, not only the magnetic loss on the first main magnet and the second main magnet is reduced, but also the material and weight of the first main magnet and the second main magnet are reduced, making the energy storage transformer more compact;

[0031] 3. By arranging the structures of the first main magnetic core, the second main magnetic core and the auxiliary magnetic core to be consistent, it is not only easy to manufacture the first main magnetic core, the second main magnetic core and the auxiliary magnetic core, but also there is no need to distinguish them during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an energy storage transformer with integrated LLC inductor in an embodiment of the present application.

[0033] Figure 2 It is a side view of an energy storage transformer with integrated LLC inductor in an embodiment of the present application.

[0034] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle.

[0035] Description of reference numerals:

[0036] 1. Main magnetic core; 11. First main magnetic core; 111. First main magnet; 112. First center column; 113. First side column; 12. Second main magnetic core; 121. Second main magnet; 122. Second center column; 123. Second side column; 2. Auxiliary magnetic core; 21. Auxiliary magnet; 22. Auxiliary center column; 23. Auxiliary side column; 3. Transformer coil; 4. LLC inductor; 5. Mounting plate; 51. Pin; 6. Demagnetization slot. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-3 This application is described in further detail.

[0038] The embodiment of the present application discloses an energy storage transformer with integrated LLC inductor.

[0039] Reference Figure 1An energy storage transformer with integrated LLC inductor includes a main magnetic core 1, a secondary magnetic core 2, a transformer coil 3 and an LLC inductor coil 4. The main magnetic core 1 includes a first main magnetic core 11 and a second main magnetic core 12 abutting each other, the transformer coil 3 is wound between the first main magnetic core 11 and the second main magnetic core 12, the secondary magnetic core 2 abuts on the first main magnetic core 11 or the second main magnetic core 12, the LLC inductor coil 4 is wound on the secondary magnetic core 2, and the LLC inductor coil 4 is connected to the transformer coil 3. The main magnetic core 1 and the transformer coil 3 form a voltage transformer part, and then the LLC inductor coil 4 is wound on the secondary magnetic core 2, and the secondary magnetic core 2 abuts on the first main magnetic core 11 or the second main magnetic core 12 to form the LLC inductor part, so that the LLC inductor part is integrated into the energy storage transformer body, thereby reducing the space occupied by the LLC resonant topology structure, so that the circuit structure can be designed in a more miniaturized manner.

[0040] In this embodiment, the structures of the first main magnetic core 11, the second main magnetic core 12 and the auxiliary magnetic core 2 are consistent. The structures of the first main magnetic core 11, the second main magnetic core 12 and the auxiliary magnetic core 2 are set to be consistent for easy manufacturing, and also for the convenience of not distinguishing the first main magnetic core 11, the second main magnetic core 12 and the auxiliary magnetic core 2 during installation.

[0041] Reference Figure 1 and 2 In an optional embodiment, a mounting plate 5 is installed on one side of the main magnetic core 1, and one side of the mounting plate 5 is attached to the transformer coil 3 and the LLC inductor 4. By attaching the mounting plate 5 to the transformer coil 3 and the LLC inductor 4, it is convenient to directly lead the connection ends of the transformer coil 3 and the LLC inductor 4 to the mounting plate 5.

[0042] A plurality of pins 51 are arranged on one side of the mounting plate 5 away from the main magnetic core 1, and the transformer coil 3 and the LLC inductor 4 are both electrically connected to the pins 51. The mounting plate 5 and the pins 51 facilitate the installation of the transformer.

[0043] The transformer coil 3 and the LLC inductor 4 are both provided with a plurality of coils. In this embodiment, the transformer coil 3 and the LLC inductor 4 are both provided with three coils. In other embodiments, the transformer coil 3 and the LLC inductor 4 may be provided with two or four coils according to the design requirements of the circuit. The transformer coils are connected to the LLC inductor 4 in a one-to-one correspondence. The cooperation of the three transformer coils 3 and the LLC inductor 4 achieves a greater voltage output.

[0044] Reference Figure 1 and Figure 3The first main magnetic core 11 includes a first main magnet 111, a first middle column 112, and a first side column 113. The first middle column 112 and the first side column 113 are fixedly connected to the same side of the first main magnet 111, and two first side columns 113 are provided. In this embodiment, three first middle columns 112 are provided, and the first middle columns 112 are arranged in a one-to-one correspondence with the transformer coil 3. The three first middle columns 112 are all located in the middle of the two first side columns 113, and the three first middle columns 112 and the first side columns 113 are located on the same horizontal plane.

[0045] The second main magnetic core 12 includes a second main magnet 121, a second center column 122, and a second side column 123. The second center column 122 and the second side column 123 are fixedly connected to the same side of the second main magnet 121, and two second side columns 123 are provided. In this embodiment, three second center columns 122 are provided, and the second center columns 122 are arranged in a one-to-one correspondence with the transformer coil 3. The three second center columns 122 are all located in the middle of the two second side columns 123, and the three second center columns 122 and the second side columns 123 are located on the same horizontal plane.

[0046] The transformer coil 3 is sleeved on the first center column 112 and the second center column 122 , and the first main magnet 111 , the first side column 113 , the second main magnet 121 and the second side column 123 cooperate to form a closed loop of the magnetic circuit.

[0047] In the conventional setting, magnetic side columns are arranged on both sides of each transformer coil 3, while in the present embodiment, only two first side columns 113 and two second side columns 123 are arranged to abut against each other, thus forming a closed magnetic circuit, thereby reducing the magnetic loss caused by arranging the first side column 113 in the middle of each first middle column 112, thereby reducing the magnetic loss in the closed magnetic circuit of the transformer, and improving the transformer effect.

[0048] In order to further reduce the magnetic loss in the main magnetic core 1, the first main magnet 111 and the second main magnet 121 in this embodiment are both provided with a demagnetizing groove 6, and the demagnetizing groove 6 is used to reduce the area through which the electromagnetic wave passes, thereby reducing the magnetic loss passing through the first main magnet 111 and the second main magnet 121. At the same time, the demagnetizing groove 6 also reduces the material and weight of the first main magnet 111 and the second main magnet 121, making the transformer more compact.

[0049] The secondary magnetic core 2 includes a secondary magnet 21, a secondary middle column 22 and a secondary side column 23. The secondary middle column 22 and the secondary side column 23 are fixedly connected on the same side of the secondary main magnet, and two secondary side columns 23 are provided. In this embodiment, three secondary middle columns 22 are provided, and the secondary middle columns 22 are arranged one by one with the LLC inductor 4. The three secondary middle columns 22 are all located in the middle of the two secondary side columns 23, and the three secondary middle columns 22 and the secondary side columns 23 are located on the same horizontal plane. The secondary middle column 22 is located in the middle of the two secondary side columns 23, and in this embodiment, the secondary middle column 22 and the secondary side columns 23 abut on the side of the second main magnet 121 away from the second middle column 122.

[0050] Similarly, the two secondary side columns 23 abut against the first main magnet 111 or the second main magnet 121 to form a closed magnetic circuit, and the LLC inductor 4 is fixed to one side of the main magnetic core 1 by using the secondary middle column 22, so that the LLC inductor is integrated on the transformer. At the same time, the magnetic loss caused by the secondary side column 23 being arranged in the middle of each secondary middle column 22 is also reduced, thereby reducing the energy loss in the circuit.

[0051] The implementation principle of the energy storage transformer with integrated LLC inductance in the embodiment of the present application is as follows: the transformer coil 3 is sleeved on the first middle column 112 and the second middle column 122, and the first main magnet 111, the first side column 113, the second main magnet 121 and the second side column 123 cooperate to form a closed loop of the magnetic circuit. Then the secondary middle column 22 fixes the LLC inductor coil 4 on one side of the main magnetic core 1, and then the two secondary side columns 23 abut against the first main magnet 111 or the second main magnet 121 to form a closed loop magnetic circuit. At the same time, the LLC inductor coil 4 is connected in series with the transformer coil 3, so that the LLC inductor part is integrated into the main body of the energy storage transformer, thereby reducing the space occupied by the LLC resonant topology structure, so that the circuit can be designed in a more miniaturized manner.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An energy storage transformer with integrated LLC inductor, characterized in that: include: A main magnetic core (1) comprises a first main magnetic core (11) and a second main magnetic core (12) abutting against each other; A secondary magnetic core (2), the secondary magnetic core (2) abutting against the first main magnetic core (11) or the second main magnetic core (12); A transformer coil (3) wound between the first main magnetic core (11) and the second main magnetic core (12); An LLC inductor (4) is wound on the auxiliary magnetic core (2), and the LLC inductor (4) is connected to the transformer coil (3).

2. The energy storage transformer with integrated LLC inductor according to claim 1, characterized in that: The first main magnetic core (11) comprises a first main magnet (111), a first middle column (112), and a first side column (113); the first middle column (112) and the first side column (113) are both fixedly connected to the same side of the first main magnet (111); two first side columns (113) are provided, and the first middle column (112) is located in the middle of the two first side columns (113); The second main magnetic core (12) comprises a second main magnet (121), a second middle column (122), and a second side column (123); the second middle column (122) and the second side column (123) are both fixedly connected to the same side of the second main magnet (121); two second side columns (123) are provided; the second middle column (122) is located in the middle of the two second side columns (123); the first middle column (112) is coaxially abutted with the second middle column (122), and the first side column (113) is abutted with the second side column (123); the transformer coil (3) is wound on the coaxially abutted first middle column (112) and the second middle column (122).

3. The energy storage transformer with integrated LLC inductor according to claim 2, characterized in that: The first main magnet (111) and the second main magnet (121) are both provided with demagnetizing grooves (6).

4. The energy storage transformer with integrated LLC inductor according to claim 2, characterized in that: The secondary magnetic core (2) comprises a secondary magnet (21), a secondary middle column (22) and a secondary side column (23); the secondary middle column (22) and the secondary side column (23) are both fixedly connected to the same side of the secondary magnet (21); two secondary side columns (23) are provided; the secondary middle column (22) is located in the middle of the two secondary side columns (23); the secondary middle column (22) abuts against the first middle column (112); and the secondary side column (23) abuts against a side of the first main magnet (111) away from the first middle column (112), or abuts against a side of the second main magnet (121) away from the second middle column (122).

5. The energy storage transformer with integrated LLC inductor according to claim 4, characterized in that: The transformer coil (3) and the LLC inductor coil (4) are both provided in plurality, and the transformer coil (3) and the LLC inductor coil (4) are connected in a one-to-one correspondence; the first middle column (112), the second middle column (122) and the secondary middle column (22) are both provided in plurality, the first middle column (112) and the second middle column (122) are both inserted in the transformer coil (3) in a one-to-one correspondence, and the secondary middle column (22) is inserted in the LLC inductor coil (4) in a one-to-one correspondence.

6. The energy storage transformer with integrated LLC inductor according to claim 5, characterized in that: Two of each of the first side pillars (113), the second side pillars (123) and the secondary side pillars (23) are provided, a plurality of the first middle pillars (112) are between the two first side pillars (113), a plurality of the second middle pillars (122) are between the two second side pillars (123), and a plurality of the secondary middle pillars (22) are between the two secondary side pillars (23).

7. The energy storage transformer with integrated LLC inductor according to claim 1, characterized in that: The first main magnetic core (11), the second main magnetic core (12) and the auxiliary magnetic core (2) have the same structure.

8. The energy storage transformer with integrated LLC inductor according to claim 1, characterized in that: A mounting plate (5) is mounted on one side of the main magnetic core (1); a plurality of pins (51) are arranged on a side of the mounting plate (5) away from the main magnetic core (1); and both the transformer coil (3) and the LLC inductor coil (4) are electrically connected to the pins (51).

Images