CN118116704A - Transformer, inductance magnetism integrated configuration - Google Patents

Abstract

The application relates to the technical field of power electronic magnetic integration, in particular to a transformer and inductance magnetic integration structure. The transformer and inductance magnetic integration structure comprises a main transformer magnetic core, a parallel inductance magnetic core and a series inductance magnetic core, wherein the parallel inductance magnetic core is connected with the main transformer magnetic core, and the series inductance magnetic core is connected with the parallel inductance magnetic core; the main transformer coil is wound on the main transformer magnetic core, the parallel inductance coil is wound on the parallel inductance magnetic core, and the series inductance coil is wound on the series inductance magnetic core. The application provides a transformer and inductance magnetic integrated structure which can effectively reduce the volume of an LLC resonant converter module, improve the power density and reduce the loss.

Description

Transformer, inductance magnetism integrated configuration

Technical Field

The application relates to the technical field of power electronic magnetic integration, in particular to a transformer and inductance magnetic integration structure.

Background

In the LLC resonant converter, the main transformer, the series inductor Lr and the parallel inductor Lm are usually manufactured separately, that is, the main transformer, the series inductor Lr and the parallel inductor Lm are independent of each other, which results in a larger volume of the LLC resonant converter and a larger space.

However, with the development of electronic technology, the density of power devices in electronic equipment is continuously improved, the layout is more and more compact, the volume is reduced, and higher requirements are placed on the power density, the volume and the heat dissipation of magnetic devices such as inductors in a power supply.

Therefore, the main transformer, the series inductor Lr and the parallel inductor Lm are split, and have a large volume, so that the LLC resonant converter module has a large volume for better heat dissipation, thereby resulting in lower power density of the LLC resonant converter module and being unfavorable for cost reduction.

Disclosure of Invention

The application provides a transformer and inductance magnetic integrated structure, which can effectively reduce the volume of an LLC resonant converter module, improve the power density and reduce the loss, and adopts the following technical scheme:

The transformer and inductor magnetic integrated structure comprises a main transformer magnetic core, a parallel inductor magnetic core and a series inductor magnetic core, wherein the parallel inductor magnetic core is connected with the main transformer magnetic core, and the series inductor magnetic core is connected with the parallel inductor magnetic core;

The main transformer coil is wound on the main transformer magnetic core, the parallel inductance coil is wound on the parallel inductance magnetic core, and the series inductance coil is wound on the series inductance magnetic core.

Through adopting above-mentioned technical scheme, through making main transformer magnetic core, parallelly connected inductance magnetic core and series connection inductance magnetic core set up side by side, can make main transformer, parallelly connected inductance and series connection inductance integrate to reduce LLC resonant converter's volume, promote power density, reduce loss.

Preferably, the main transformer magnetic core, the parallel inductance magnetic core and the series inductance magnetic core all comprise end plates and central magnetic columns fixed on the end plates;

The center magnetic column of the parallel inductance core is connected with the end plate of the main transformer core, and the parallel inductance coil and the main transformer coil are respectively positioned at two sides of the end plate of the main transformer core; the center magnetic column of the series inductance core is connected with the end plate of the parallel inductance core, and the parallel inductance coil and the series inductance coil are respectively positioned at two sides of the end plate of the parallel inductance core.

By adopting the technical scheme, the end plate of the main transformer magnetic core can be made to be the common end face of the main transformer magnetic core and the parallel inductance magnetic core, and the end plate of the parallel inductance magnetic core is made to be the common end face of the parallel inductance magnetic core and the serial inductance magnetic core, so that the volumes of the parallel inductance and the serial inductance are effectively reduced.

Preferably, the winding directions of the main transformer coil, the parallel inductor coil and the series inductor coil are the same.

Through adopting above-mentioned technical scheme, through selecting suitable homonymous end, make the magnetic field direction of main transformer inductance, shunt inductance and series inductance the same, consequently, the magnetic field of main transformer and shunt inductance in two sharing terminal surfaces department offset each other, and shunt inductance and series inductance offset each other in the magnetic field of two sharing terminal surfaces department, avoid the phenomenon of magnetic saturation, can effectively reduce the loss.

Preferably, the main transformer coil comprises a primary coil and a secondary coil, wherein the primary coil adopts litz wire or copper strips, the secondary coil adopts litz wire or copper strips, and the primary coil and the secondary coil are wound by adopting a sandwich method.

By adopting the technical scheme, the litz wire can reduce alternating current loss, and the leakage inductance of the main transformer coil can be reduced by winding through a sandwich method, so that the loss is reduced.

Preferably, the main transformer core comprises two opposite buckled PQ type magnetic cores, and the parallel inductance magnetic core comprises a PQ type magnetic core arranged opposite to the main transformer magnetic core; the series inductor core comprises a PQ type core arranged in the same direction as the parallel inductor core.

Through adopting above-mentioned technical scheme, the adoption of PQ type magnetic core is convenient for the integration of main transformer magnetic core, shunt inductance magnetic core and series inductance magnetic core on the one hand, and on the other hand adopts PQ type magnetic core can make main transformer, shunt inductance and series inductance have less volume to reduce LLC resonant converter's volume.

Preferably, the connecting assembly comprises a first supporting plate, a second supporting plate and a connecting rod; the first supporting plate and the second supporting plate are connected with each other through a connecting rod;

the main transformer magnetic core, the parallel magnetic core and the serial magnetic core are all positioned between the first supporting plate and the second supporting plate, and the first supporting plate is connected with the main transformer magnetic core; the second supporting plate is connected with the series inductance core.

Through adopting above-mentioned technical scheme, the connecting rod is fixed first layer board and second layer board, can press from both sides the main transformer magnetic core, parallelly connected inductance magnetic core and establish ties inductance magnetic core tightly to guarantee the stability between main transformer, parallelly connected inductance and the series connection inductance three.

Preferably, the first supporting plate is connected with an end plate of the main transformer magnetic core, and the second supporting plate is connected with an end plate of the series inductance magnetic core;

The utility model discloses a main transformer magnetic core, including main transformer magnetic core, series inductance magnetic core, first layer board, second layer board, main transformer magnetic core and series inductance magnetic core's end plate both sides all are provided with the breach, all be provided with the fixture block on first layer board and the second layer board, the shape of fixture block and the shape phase-match of breach, and the fixture block setting is in the breach and with breach lateral wall butt.

Through adopting above-mentioned technical scheme, the setting of fixture block can avoid between main transformer magnetic core and the first layer board, between series connection inductance magnetic core and the second layer board relative movement, promotes the stability between main transformer inductance, parallel inductance and the series connection inductance.

Preferably, the connecting assembly further comprises a first limiting block and a second limiting block; the first limiting block is positioned at the joint of the main transformer magnetic core and the parallel inductance magnetic core, and the second limiting block is positioned at the joint of the parallel inductance magnetic core and the series inductance magnetic core;

the side wall of the first limiting block is simultaneously abutted against the main transformer magnetic core and the parallel inductance magnetic core; the side wall of the second limiting block is simultaneously abutted against the parallel inductance core and the series inductance core;

The first limiting block and the second limiting block are connected with the connecting rod.

By adopting the technical scheme, the side wall of the first limiting block is simultaneously abutted with the main transformer magnetic core and the parallel inductance magnetic core, so that the first limiting block can limit the main transformer magnetic core and the parallel inductance magnetic core, and offset between the main transformer magnetic core and the parallel inductance magnetic core is avoided; the side wall of the second limiting block is simultaneously abutted against the parallel inductance core and the series inductance core, so that the second limiting block can limit the parallel inductance core and the series inductance core, and offset between the parallel inductance core and the series inductance core is avoided.

Preferably, the connecting rod, the first limiting block and the second limiting block are all provided with two; the two first limiting blocks are respectively positioned at two sides of the main transformer magnetic core, the two second limiting blocks are respectively positioned at two sides of the parallel inductance magnetic core, the two first limiting blocks are in one-to-one correspondence with the two connecting rods, and the two second limiting blocks are also in one-to-one correspondence with the two connecting rods; waist-shaped holes for the connecting rods to pass through are formed in the first supporting plate and the second supporting plate, and the waist-shaped holes are formed in the diameter direction of the first supporting plate or the second supporting plate;

Two guide inclined planes are arranged on the side walls of the first supporting plate and the second supporting plate, which are opposite to each other, and the main transformer magnetic core and the series inductance magnetic core are positioned between the two guide inclined planes; a guide gasket is arranged at the guide inclined plane and is abutted with the guide inclined plane; the guide gasket is connected with the connecting rod.

Through adopting above-mentioned technical scheme, when the nut is screwing up the in-process, two connecting rods can be close to each other under the effect of guide gasket to make two first stopper clamp to main transformer magnetic core, make two second stopper clamp to parallelly connected inductance magnetic core, promote main transformer magnetic core, parallelly connected inductance magnetic core and the stability of series connection inductance magnetic core.

In summary, the present invention includes at least one of the following beneficial technical effects:

1. the main transformer magnetic core, the parallel inductance magnetic core and the series inductance magnetic core are arranged in parallel, so that the main transformer, the parallel inductance and the series inductance can be integrated, the volume of the LLC resonant converter is reduced, the power density is improved, and the loss is reduced.

2. The common end face is arranged between the main transformer inductor and the parallel inductor, and the common end face is arranged between the parallel inductor and the series inductor, so that the magnetic fields of the main transformer inductor and the parallel inductor are counteracted, the magnetic fields of the parallel inductor and the series inductor are counteracted, the phenomenon of magnetic saturation is avoided, and the loss is reduced;

3. The main transformer magnetic core, the parallel inductance magnetic core and the series inductance magnetic core are clamped through the first supporting plate and the second supporting plate, and the relative positions among the main transformer magnetic core, the parallel inductance magnetic core and the series inductance magnetic core are limited through the first limiting block and the second limiting block, so that the relative position precision among the main transformer magnetic core, the parallel inductance magnetic core and the series inductance magnetic core is improved.

Drawings

Fig. 1 is a schematic structural diagram of a main transformer, a parallel inductor and a series inductor in embodiment 1 of the present application;

Fig. 2 is a schematic diagram of an explosion structure of a main transformer, a parallel inductor and a series inductor in embodiment 1 of the present application;

FIG. 3 is a schematic diagram showing the overall structure of the transformer and the inductor magnetic integrated structure in embodiment 2 of the present application;

FIG. 4 is a schematic diagram of an exploded structure of a transformer and an inductor magnetic integrated structure in embodiment 2 of the present application;

Fig. 5 is another view of an exploded schematic diagram of the transformer and inductor magnetic integrated structure in embodiment 2 of the present application.

The reference numerals in the drawings: 1. a main transformer core; 2. a main transformer coil; 21. a primary coil; 22. a secondary coil; 3. a parallel inductance core; 4. parallel inductance coils; 5. a series inductance core; 6. a series inductance coil; 7. a connection assembly; 71. a first pallet; 72. a second pallet; 73. a clamping block; 74. a connecting rod; 75. a first limiting block; 76. a second limiting block; 77. a guide groove; 78. and a guide gasket.

Detailed Description

The invention is described in further detail below with reference to fig. 1-5.

Example 1

The embodiment of the application discloses a transformer and an inductance magnetic integration structure. Referring to fig. 1, the transformer, inductor magnetic integrated structure includes a main transformer core 1, a main transformer coil 2, a parallel inductor core 3, a parallel inductor coil 4, a series inductor core 5, and a series inductor coil 6. The main transformer coil 2 is wound on the main transformer magnetic core 1 to form a main transformer, the parallel inductance coil 4 is wound on the parallel inductance magnetic core 3 to form a parallel inductance, and the series inductance coil 6 is wound on the series inductance magnetic core 5 to form a series inductance.

Referring to fig. 2, in the embodiment of the present application, the main transformer core 1 includes two PQ-type cores that are fastened to each other. The PQ-type magnetic core comprises end plates, a central magnetic post and side legs, wherein the end plates of the two PQ-type magnetic cores are arranged oppositely, the central magnetic posts of the two PQ-type magnetic cores are in contact, and the side legs of the two PQ-type magnetic cores are in contact with each other. The main transformer coil 2 is wound around the center leg of the two PQ-type cores.

The parallel inductor core 3 and the series inductor core 5 are similarly PQ type cores. The parallel inductance core 3 is located on one side of the main transformer core 1, the center magnetic leg and the side leg of the parallel inductance core 3 are in contact with the end plate of the main transformer core 1, and the center magnetic leg of the parallel inductance core 3 is coaxial with the center magnetic leg of the main transformer core 1.

In the embodiment of the application, the winding directions of the main transformer coil 2, the parallel inductor coil 4 and the series inductor coil 6 are the same. The main transformer coil 2 comprises a primary coil 21 and a secondary coil 22, the primary coil 21 adopts litz wire, the secondary coil 22 adopts copper strips, and the primary coil 21 and the secondary coil 22 are wound on a central magnetic column of the main transformer magnetic core 1 by adopting a sandwich method.

As a result, the main transformer coil 2 and the shunt inductance coil 4 are located on both sides of the end plate of the main transformer core 1, respectively, and the end plate of the main transformer core 1 serves as a common end surface of the main transformer and the shunt inductance. The main transformer magnetic field and the parallel inductance magnetic field are mutually offset at the shared end face by controlling the number of turns, the inductance, the reasonable selection of the homonymous ends and the like of the main transformer coil 2 and the parallel inductance coil 4.

The center magnetic pillar and the side leg of the series inductance core 5 are abutted with the end plate of the parallel inductance core 3, and the center magnetic pillar of the series inductance core 5 is coaxial with the center magnetic pillar of the parallel inductance core 3, and the series inductance coil 6 is wound on the center magnetic pillar of the series inductance core 5.

Since then, the parallel inductor coil 4 and the series inductor coil 6 are located on both sides of the end plates of the parallel inductor core 3, respectively. The end plate of the parallel inductor core 3 serves as a common end face for the parallel inductor and the series inductor. The number of turns, the inductance, the reasonable selection of the same-name ends and the like of the parallel inductance coil 4 and the serial inductance coil 6 are controlled, so that the mutual cancellation of the serial inductance magnetic field and the parallel inductance magnetic field at the shared end face is realized.

In summary, the main transformer, the series inductor and the parallel inductor magnetic fields cancel out at the common end face, so that the phenomenon of magnetic saturation is avoided, and the loss can be effectively reduced.

The implementation principle of the transformer and inductance magnetic integration structure in the embodiment of the application is as follows: on the other hand, by arranging the main transformer core 1, the parallel inductor core 3 and the series inductor core 5 in parallel, the main transformer, the parallel inductor and the series inductor can be integrated and miniaturized, thereby reducing the volume of the LLC resonant converter, improving the power density, and reducing the loss.

On the other hand, the common end face is arranged between the main transformer inductor and the parallel inductor, and the common end face is arranged between the parallel inductor and the series inductor, so that the magnetic fields of the main transformer inductor and the parallel inductor are counteracted, the magnetic fields of the parallel inductor and the series inductor are counteracted, the phenomenon of magnetic saturation is avoided, and the loss is reduced.

Example 2

The embodiment of the application discloses a transformer and inductor magnetic integrated structure, which is different from embodiment 1 in that a connecting component 7 is added on the basis of embodiment 1, namely the transformer and inductor magnetic integrated structure also comprises the connecting component 7.

Referring to fig. 3 and 4, the connection assembly 7 includes a first pallet 71, a second pallet 72, and a connection rod 74. The main transformer core 1, the parallel inductor core 3, and the series inductor core 5 are all located between the first pallet 71 and the second pallet 72. The connecting rods 74 are provided in two, and the main transformer core 1, the parallel inductor core 3, and the series inductor core 5 are all located between the two connecting rods 74. Both ends of the connecting rod 74 are connected to the first pallet 71 and the second pallet 72, respectively, so that the first pallet 71 and the second pallet 72 clamp the main transformer core 1, the parallel core, and the series core.

Because two notches are formed on the end plate of the PQ type magnetic core, the two notches are respectively positioned on two sides of the central magnetic column, and the notches are positioned between the two side legs, the main transformer magnetic core 1, the parallel inductance magnetic core 3 and the series inductance magnetic core 5 are respectively provided with two notches.

Referring to fig. 4 and 5, the first supporting plate 71 and the second supporting plate 72 are provided with clamping blocks 73 matching with the notch, and the clamping blocks 73 can be matched with the notch in a clamping manner, so that the main transformer core 1 can be connected with the first supporting plate 71, the series inductor core 5 is connected with the second supporting plate 72, and the clamping blocks 73 can prevent relative movement between the main transformer core 1 and the first supporting plate 71 and between the series inductor core 5 and the second supporting plate 72, so that stability among the main transformer core 1, the parallel inductor core 3 and the series inductor core 5 is improved.

The end plates of the main transformer magnetic core 1 and the series inductance magnetic core 5 are also provided with notches, the first supporting plate 71 and the second supporting plate 72 are respectively provided with a clamping block 73, the shape of the clamping block 73 is matched with that of the notches, and the clamping blocks 73 are arranged in the notches and are abutted against the side walls of the notches.

The connection assembly 7 further comprises two first stop blocks 75 and two second stop blocks 76. The two first limiting blocks 75 are respectively located at two sides of the main transformer inductance core 1, the two second limiting blocks 76 are respectively located at two sides of the parallel inductance core 3, the two first limiting blocks 75 are in one-to-one correspondence with the two connecting rods 74, the two second limiting blocks 76 are in one-to-one correspondence with the two connecting rods 74, and through holes for the connecting rods 74 to pass through are respectively formed in the first limiting blocks 75 and the second limiting blocks 76.

The first stopper 75 is located the junction of main transformer core 1 and parallelly connected inductance core 3 to the breach cooperation on the end plate of first stopper 75 and main transformer core 1, first stopper 75 lateral wall simultaneously with main transformer core 1 and parallelly connected inductance core 3 butt, make first stopper 75 can carry out spacingly to main transformer core 1 and parallelly connected inductance core 3, avoid producing the skew between main transformer core 1 and the parallelly connected inductance core 3.

The second limiting block 76 is located at the connection part of the parallel inductance core 3 and the series inductance core 5, and the second limiting block 76 is matched with a notch on the end plate of the parallel inductance core 3, the side wall of the second limiting block 76 is simultaneously abutted against the parallel inductance core 3 and the series inductance core 5, so that the second limiting block 76 can limit the parallel inductance core 3 and the series inductance core 5, and offset between the parallel inductance core 3 and the series inductance core 5 is avoided.

In the embodiment of the present application, the first and second pallets 71 and 72 are each provided as a circular plate, and the first and second pallets 71 and 72 have the same diameter and are coaxially provided. The side of the first limiting block 75 facing away from the main transformer magnetic core 1 and the side of the second limiting block 76 facing away from the parallel inductor magnetic core 3 are cambered surfaces and are coplanar with the cylindrical side walls of the first supporting plate 71 and the second supporting plate 72.

In order to realize the clamping of the main transformer magnetic core 1 by the two first limiting blocks 75 and the parallel inductor magnetic core 3 by the two second limiting blocks 76, guide grooves 77 are formed in the opposite side walls of the first supporting plate 71 and the second supporting plate 72, and the guide grooves 77 positioned on the first supporting plate 71 are provided with two guide grooves and symmetrically arranged on two sides of the center position of the first supporting plate 71; the guide grooves 77 on the second pallet 72 are also provided in two and symmetrically provided on both sides of the center position of the second pallet 72.

The guide groove 77 is a wedge-shaped groove, the bottom surface of the guide groove is obliquely arranged and is set to be a guide inclined surface, the guide inclined surface faces the central lines of the first supporting plate 71 and the second supporting plate 72, a wedge-shaped guide gasket 78 is arranged in the guide groove 77, the wedge-shaped guide gasket 78 is abutted to the bottom surface of the guide groove 77, the connecting rod 74 is arranged on the wedge-shaped guide gasket 78 in a penetrating mode, waist-shaped holes through which the connecting rod 74 passes are formed in the first supporting plate 71 and the second supporting plate 72, and the waist-shaped holes are formed in the diameter direction of the first supporting plate 71 and the diameter direction of the second supporting plate 72.

In the embodiment of the present application, the connection rod 74 is provided as a screw and is provided with a nut. The connection rod 74 penetrates the first and second pallets 71 and 72, and connects the first and second pallets 71 and 72 by tightening nuts.

When the nut is screwed down, the wedge-shaped guide gasket 78 on the first supporting plate 71 moves towards the center of the first supporting plate 71 under the action of the guide groove 77, and similarly, the wedge-shaped guide gasket 78 on the second supporting plate 72 moves towards the center of the second supporting plate 72 under the action of the guide groove 77, so that the connecting rod 74 moves towards the directions close to the main transformer magnetic core 1 and the parallel inductor magnetic core 3, and the connecting rod 74 pushes the first limiting block 75 and the second limiting block 76 to abut against and clamp the main transformer magnetic core 1 and the parallel inductor magnetic core 3.

The implementation principle of the transformer and inductance magnetic integration structure in the embodiment of the application is as follows: the first supporting plate 71 and the second supporting plate 72 are fixed through the connecting rod 74, so that the main transformer magnetic core 1, the parallel inductance magnetic core 3 and the series inductance magnetic core 5 can be clamped, and the stability among the three is ensured. Meanwhile, the relative positions among the main transformer magnetic core 1, the parallel inductance magnetic core 3 and the series inductance magnetic core 5 are limited through the first limiting block 75 and the second limiting block 76, so that the relative position accuracy among the three is improved.

The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims (9)

1. A transformer, inductance magnetism integrated configuration, its characterized in that: the parallel inductance type transformer comprises a main transformer core (1), a parallel inductance core (3) and a series inductance core (5) which are arranged in parallel, wherein the parallel inductance core (3) is connected with the main transformer core (1), and the series inductance core (5) is connected with the parallel inductance core (3);

Main transformer coil (2) is wound on main transformer magnetic core (1), parallel inductance coil (4) is wound on parallel inductance magnetic core (3), and series inductance coil (6) is wound on series inductance magnetic core (5).

2. The transformer, inductor magnetic integrated structure of claim 1, wherein: the main transformer magnetic core (1), the parallel inductance magnetic core (3) and the series inductance magnetic core (5) comprise end plates and central magnetic columns fixed on the end plates;

The center magnetic column of the parallel inductance core (3) is connected with the end plate of the main transformer core (1), and the parallel inductance coil (4) and the main transformer coil (2) are respectively positioned at two sides of the end plate of the main transformer core (1); the center magnetic column of the series inductance core (5) is connected with the end plate of the parallel inductance core (3), and the parallel inductance coil (4) and the series inductance coil (6) are respectively positioned at two sides of the end plate of the parallel inductance core (3).

3. The transformer, inductor magnetic integrated structure of claim 2, wherein: the said; the winding directions of the main transformer coil (2), the parallel inductance coil (4) and the series inductance coil (6) are the same.

4. A transformer, inductor magnetic integrated structure as claimed in claim 3, characterized in that: the main transformer coil (2) comprises a primary coil (21) and a secondary coil (22), wherein the primary coil (21) adopts litz wire or copper strips, the secondary coil (22) adopts litz wire or copper strips, and the primary coil (21) and the secondary coil (22) are wound by adopting a sandwich method.

5. The transformer, inductor magnetic integrated structure of claim 2, wherein: the main transformer core (1) comprises two PQ type magnetic cores which are buckled oppositely, and the parallel inductance magnetic core (3) comprises a PQ type magnetic core which is arranged opposite to the main transformer core (1); the series inductor core (5) comprises a PQ type core which is arranged in the same direction as the parallel inductor core (3).

6. The transformer, inductor magnetic integrated structure of any one of claims 1-5, wherein: the connecting assembly (7) is further included, and the connecting assembly (7) comprises a first supporting plate (71), a second supporting plate (72) and a connecting rod (74); the first supporting plate (71) and the second supporting plate (72) are connected with each other through a connecting rod (74);

The main transformer magnetic core (1), the parallel magnetic core and the series magnetic core are all positioned between a first supporting plate (71) and a second supporting plate (72), and the first supporting plate (71) is connected with the main transformer magnetic core (1); the second supporting plate (72) is connected with the series inductance core (5).

7. The transformer, inductor magnetic integrated structure of claim 6, wherein: the main transformer magnetic core (1), the parallel inductance magnetic core (3) and the series inductance magnetic core (5) are all positioned between the first supporting plate (71) and the second supporting plate (72); the first supporting plate (71) is in contact with an end plate of the main transformer magnetic core (1), and the second supporting plate (72) is in contact with an end plate of the series inductance magnetic core (5);

The end plates of the main transformer magnetic core (1) and the end plates of the series inductance magnetic core (5) are respectively provided with a notch, clamping blocks (73) are respectively arranged on the first supporting plate (71) and the second supporting plate (72), the shape of each clamping block (73) is matched with that of each notch, and the clamping blocks (73) are matched with the notches in a clamping mode.

8. The transformer, inductor magnetic integrated structure of claim 6, wherein: the connecting assembly (7) further comprises a first limiting block (75) and a second limiting block (76); the first limiting block (75) is positioned at the joint of the main transformer magnetic core (1) and the parallel inductance magnetic core (3), and the second limiting block (76) is positioned at the joint of the parallel inductance magnetic core (3) and the series inductance magnetic core (5);

the side wall of the first limiting block (75) is simultaneously abutted against the main transformer magnetic core (1) and the parallel inductance magnetic core (3); the side wall of the second limiting block (76) is simultaneously abutted against the parallel inductance core (3) and the series inductance core (5);

the first limiting block (75) and the second limiting block (76) are connected with the connecting rod (74).

9. The transformer, inductor magnetic integrated structure of claim 8, wherein: the connecting rod (74), the first limiting block (75) and the second limiting block (76) are respectively provided with two; the two first limiting blocks (75) are respectively positioned at two sides of the main transformer magnetic core (1), the two second limiting blocks (76) are respectively positioned at two sides of the parallel inductance magnetic core (3), the two first limiting blocks (75) are in one-to-one correspondence with the two connecting rods (74), and the two second limiting blocks (76) are in one-to-one correspondence with the two connecting rods (74); waist-shaped holes for the connecting rods (74) to pass through are formed in the first supporting plate (71) and the second supporting plate (72), and the waist-shaped holes are formed in the diameter direction of the first supporting plate (71) or the second supporting plate (72);

Two guide inclined planes are arranged on the side walls of the first supporting plate (71) and the second supporting plate (72) which are opposite to each other, the two guide inclined planes are arranged oppositely, and the main transformer magnetic core (1) and the series inductance magnetic core (5) are positioned between the two guide inclined planes; a guide gasket (78) is arranged at the guide inclined plane, and the guide gasket (78) is abutted with the guide inclined plane; the guide gasket (78) is connected with the connecting rod (74).