A phase-shifted full-bridge and LLC hybrid converter magnetically integrated planar transformer and system

Abstract

The application discloses a phase-shift full-bridge and LLC hybrid converter magnetic integration planar transformer and system, which comprises a first magnetic core, a second magnetic core, a first magnetic core side column, a first magnetic core middle column, a second magnetic core middle column and a second magnetic core side column; the first magnetic core and the second magnetic core are oppositely arranged, and a primary winding and a secondary winding are sequentially arranged between the first magnetic core and the second magnetic core; the first magnetic core is provided with the first magnetic core middle column, the second magnetic core middle column, the first magnetic core side column and the second magnetic core side column; the first magnetic core middle column and the second magnetic core middle column are arranged between the first magnetic core side column and the second magnetic core side column; through the innovative design of the magnetic integration planar transformer and the strategy of bridge arm reuse, the application not only significantly improves the power density, the magnetic core utilization rate and the overall efficiency of the converter, but also greatly simplifies the system structure and reduces the cost, thereby providing a brand-new solution for realizing a high-performance and miniaturized power conversion system and having wide application prospects and important practical value.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of power electronics technology in the electrical engineering major, and relates to a magnetic integrated planar transformer of a phase-shifted full-bridge and LLC hybrid converter and a system. BACKGROUND

[0002] As a form of power supply, the direct current power supply is widely used in the fields of rail transit, communication industry, power industry, aerospace, etc. In recent years, the direct current power supply has proposed requirements such as voltage adjustable, miniaturization, high efficiency, and multi-output. In view of such requirements, a phase-shifted full-bridge and LLC hybrid converter hybrid topology is adopted. Through bridge arm reuse, the LLC resonant cavity is connected to the lagging bridge arm of the phase-shifted full-bridge converter, which is more conducive to the soft switching of the primary side switch tube in the hybrid topology, so as to reduce the switching loss of the power device and further improve the efficiency of the converter. At the same time, the phase-shifted full-bridge converter can realize the requirement of wide-range voltage adjustment by adjusting the phase-shift angle. The LLC resonant converter works in the DCX state. By selecting a reasonable voltage gain and making the LLC work at the resonant point, the working efficiency can be further improved.

[0003] However, the phase-shifted full-bridge and LLC hybrid converter contains many magnetic elements, including the phase-shifted full-bridge resonant inductor, the phase-shifted full-bridge transformer, the LLC resonant inductor, and the LLC transformer. The use of traditional wound inductors and transformers will limit the improvement of overall efficiency and power density. In this regard, printed circuit boards (PCBs) can be used instead of traditional wound windings to take advantage of the high precision and flat design of PCBs, thereby improving processing consistency, heat dissipation effect, and reducing losses.

[0004] On this basis, considering that the phase-shifted full-bridge resonant inductor will cause duty cycle loss and ZVS can be realized through the LLC resonant cavity, the phase-shifted full-bridge resonant inductor is removed, and the phase-shifted full-bridge transformer, the LLC resonant inductor (leakage inductance instead), and the LLC transformer are integrated in one magnetic core by using magnetic integration technology. This can further reduce the volume and loss of magnetic elements. The magnetic integration technology combines multiple magnetic cores into one magnetic core, reducing the number of magnetic elements of the converter, thereby improving the overall efficiency and power density of the converter. SUMMARY

[0005] The purpose of the present application is to provide a phase-shifted full-bridge and LLC hybrid converter magnetic integrated planar transformer, which solves the problems of too many magnetic elements, large volume, and high loss in the phase-shifted full-bridge converter and LLC resonant converter in the prior art.

[0006] To achieve the above purpose, the present application adopts the following technical solutions:

[0007] The application discloses a magnetic integrated planar transformer of a phase-shift full-bridge and LLC hybrid converter, which comprises a first magnetic core, a second magnetic core, a first magnetic core side column, a first magnetic core middle column, a second magnetic core middle column and a second magnetic core side column.

[0008] Further, the first magnetic core middle column and the second magnetic core middle column are both provided with air gaps, the effective cross-sectional area of the first magnetic core middle column is the same as that of the first magnetic core side column, the effective cross-sectional area of the second magnetic core middle column is the same as that of the second magnetic core side column, the size of the air gap of the first magnetic core middle column is different from that of the second magnetic core middle column, and the effective cross-sectional area of the first magnetic core side column is the same as that of the second magnetic core side column.

[0009] Further, the primary winding comprises a phase-shift full-bridge primary winding Lpps and an LLC primary winding Lpllc, and the phase-shift full-bridge secondary winding comprises a phase-shift full-bridge secondary winding Lsps and LLC secondary windings Lsllc1 and Lsllc2.

[0010] Further, the phase-shift full-bridge primary winding Lpps is wound on the first magnetic core middle column and has Np1 turns, the LLC primary winding Lpllc is wound on the second magnetic core middle column and has Np2 turns, the winding direction of the phase-shift full-bridge primary winding Lpps is the same as that of the LLC primary winding Lpllc, the phase-shift full-bridge secondary winding Lsps is wound on the first magnetic core middle column and has Ns1 turns, the LLC secondary windings Lsllc1 and Lsllc2 are wound on the second magnetic core middle column and each has Ns2 turns, the winding direction of the phase-shift full-bridge secondary winding Lsps is opposite to that of the phase-shift full-bridge primary winding Lpps, the winding direction of the LLC secondary windings Lsllc1 and Lsllc2 is opposite to that of the LLC primary winding Lpllc, the first magnetic core middle column is provided with Np1+Ns1 turns of windings, and the second magnetic core middle column is provided with Np2+2*Ns2 turns of windings.

[0011] Further, the phase-shift full-bridge primary winding Lpps is composed of Np1 turns of windings, is connected from a first layer of PCB winding terminals 1, is sequentially connected in series for each layer of PCB, has consistent winding directions and is connected to an Np1 layer of PCB winding terminals 2 to end the winding of the phase-shift full-bridge primary winding Lpps.

[0012] Further, the LLC primary winding Lpllc is composed of Np2 turns of windings, is connected from a first layer of PCB winding terminals 4, is sequentially connected in series for each layer of PCB, has consistent winding directions and is connected to an Np2 layer of PCB winding terminals 3 to end the winding of the LLC primary winding Lpllc.

[0013] Further, the phase-shifted full-bridge secondary winding Lsps is composed of Ns1 turns of winding, and is connected from the PCB winding terminal 5 at the 0.5*Np1+1 layer, sequentially connected in series for each layer of PCB, and connected to the PCB winding terminal 6 at the Np1+Ns1 layer to end the winding of the secondary winding Lsx.

[0014] Further, the LLC secondary winding Lsllc1 is composed of Ns2 turns of winding, and is connected from the PCB winding terminal 8 at the Np2+1 layer, sequentially connected in series for each layer of PCB, and connected to the PCB winding terminal 7 at the Np2+Ns2 layer to end the winding of the LLC secondary winding Lsllc1.

[0015] Further, the LLC secondary winding Lsllc2 is composed of Ns2 turns of winding, and is connected from the PCB winding terminal 10 at the Np2+Ns2 layer, sequentially connected in series for each layer of PCB, and connected to the PCB winding terminal 9 at the Np2+2*Ns2 layer to end the winding of the LLC secondary winding Lsllc2.

[0016] A transformer system comprising the phase-shifted full-bridge and LLC hybrid converter magnetic integrated planar transformer.

[0017] Compared with the prior art, the present application has the following technical effects:

[0018] The present application integrates the technical features of the phase-shifted full-bridge converter and the LLC resonant converter, and constructs a hybrid converter topology structure with high efficiency and compactness. The core of the design is that the transformer of the phase-shifted full-bridge converter and the transformer of the LLC resonant converter are integrated through magnetic coupling. This measure not only greatly simplifies the complex layout of multiple independent magnetic elements in the traditional design, but also significantly reduces the overall volume of the converter, providing strong support for the miniaturization and light weight of electronic devices.

[0019] Further, the present application uses leakage inductance to replace the original primary series resonant inductance in the LLC resonant converter. This innovation in design not only reduces the number of required components and the complexity of the system, but also integrates the originally dispersed three magnetic elements into a planar magnetic core through the design of the magnetic integrated planar transformer. This integrated design not only improves the power density of the converter, enabling more power to be transmitted in a unit volume, but also significantly improves the utilization rate of the magnetic core, making the magnetic energy conversion more efficient and the energy loss to a minimum.

[0020] In addition, another highlight of the present application is the strategy of bridge arm reuse. By connecting the LLC resonant cavity to the lagging bridge arm of the phase-shifted full-bridge converter, the soft switching function of the primary side switch tube in the hybrid topology is realized. This design greatly reduces the overlap area of voltage and current during the turn-on and turn-off process of the switch tube, almost eliminates the switching loss, and effectively improves the overall efficiency of the converter. The realization of soft switching not only prolongs the service life of the power device, but also reduces the demand for heat dissipation devices of the system, further reducing the volume and weight of the converter.

[0021] In summary, through the innovative design of the magnetic integrated planar transformer and the strategy of bridge arm reuse, the present application not only significantly improves the power density, magnetic core utilization rate and overall efficiency of the converter, but also greatly simplifies the system structure and reduces the cost, providing a new solution for realizing high-performance and miniaturized power conversion systems, and has wide application prospect and important practical value. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the schematic diagram of the phase-shifted full-bridge and LLC hybrid converter of the present application;

[0023] Figure 2 is the schematic diagram of the magnetic integrated planar transformer of the phase-shifted full-bridge and LLC hybrid converter of the present application after being split;

[0024] Figure 3 is the winding schematic diagram of the magnetic integrated planar transformer of the phase-shifted full-bridge and LLC hybrid converter of the present application;

[0025] Figure 4 is the schematic diagram of the forward coupled reluctance model of the magnetic integrated planar transformer of the phase-shifted full-bridge and LLC hybrid converter of the present application;

[0026] Figure 5 is the schematic diagram of the reverse coupled reluctance model of the magnetic integrated planar transformer of the phase-shifted full-bridge and LLC hybrid converter of the present application. DETAILED DESCRIPTION

[0027] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0028] The technical principle of the present application mainly focuses on the hybrid topology structure of the phase-shifted full-bridge converter and the LLC resonant converter, and realizes the goal of reducing the volume of the converter and improving the power density and efficiency through the technical means of magnetic integration and bridge arm reuse.

[0029] The present application integrates the transformer of the phase-shifted full-bridge converter and the transformer of the LLC resonant converter on a common magnetic core structure, i.e. the first magnetic core 11 and the second magnetic core 41, through magnetic flux coupling. The two magnetic cores are oppositely arranged, and the primary winding and the secondary winding are arranged in sequence in the middle.

[0030] This magnetic integration design not only reduces the number of magnetic components, but also improves the utilization of the magnetic core and the overall efficiency of the converter by optimizing the magnetic circuit layout and winding configuration.

[0031] In LLC resonant converters, the primary series resonant inductor is an important component for adjusting the resonant frequency of the resonant tank and achieving energy transfer.

[0032] The present invention uses leakage inductance (i.e. the magnetic flux in the magnetic core that is not fully coupled) to replace this primary series resonant inductor. By precisely adjusting the air gap size and winding configuration of the magnetic core columns, precise control of the leakage inductance can be achieved to meet the operating requirements of the LLC resonant converter.

[0033] This design not only simplifies the system structure, but also reduces the number of components and cost.

[0034] In the hybrid topology, the present invention connects the LLC resonant tank to the lagging bridge arm of the phase-shifted full-bridge converter through bridge arm reuse.

[0035] This design allows the LLC resonant converter and the phase-shifted full-bridge converter to share part of the circuit and switching tubes, thereby reducing the number of switching tubes and the complexity of the system.

[0036] More importantly, through bridge arm reuse, soft switching of the primary side switching tube in the hybrid topology is achieved. Soft switching refers to the reduction of the overlap area of voltage and current during the turn-on and turn-off processes of the switching tube, which almost eliminates switching loss. This not only improves the efficiency of the converter, but also prolongs the service life of the power device.

[0037] The present invention carefully optimizes the winding configuration and air gap design. The primary winding and the secondary winding are wound on different magnetic core columns, and the winding direction and number of turns are clearly specified. This winding configuration helps to reduce mutual inductance interference between windings, improving the stability and reliability of the converter.

[0038] At the same time, by precisely adjusting the air gap size and effective cross-sectional area of the magnetic core columns, precise control of the winding inductance can be achieved to meet different application requirements.

[0039] In summary, the technical principles of the present invention are mainly based on magnetic integration, leakage inductance replacing primary series resonant inductor, bridge arm reuse, and careful winding configuration and air gap design. These technical means work together to achieve the goal of reducing the size of the converter, improving power density and efficiency.

[0040] Example 1, please participate Figure 2The application discloses a phase-shift full-bridge and LLC hybrid converter magnetic integration planar transformer, which comprises a first magnetic core 11, a second magnetic core 41, a first magnetic core side column 21, a first magnetic core middle column 31, a second magnetic core middle column 32 and a second magnetic core side column 22; the first magnetic core 11 and the second magnetic core 41 are oppositely arranged, and a primary winding and a secondary winding are sequentially arranged between the first magnetic core 11 and the second magnetic core 41; the first magnetic core 11 is provided with the first magnetic core middle column 31, the second magnetic core middle column 32, the first magnetic core side column 21 and the second magnetic core side column 22; the first magnetic core middle column 31 and the second magnetic core middle column 32 are arranged between the first magnetic core side column 21 and the second magnetic core side column 22.

[0041] By magnetically integrating the transformer parts of the phase-shift full-bridge converter and the LLC resonant converter, i.e., realizing the functions of the two converters on a common magnetic core structure, the design effectively reduces the number of magnetic elements, reduces the use of magnetic core material, and thus reduces the weight and volume of the entire converter. At the same time, magnetic integration also helps to reduce magnetic leakage and energy loss, and improve the overall efficiency of the converter.

[0042] The first magnetic core 11 and the second magnetic core 41 are oppositely arranged, and a primary winding and a secondary winding are sequentially arranged in the middle, which helps to form a compact and efficient magnetic circuit. The reasonable configuration of the first magnetic core middle column 31, the second magnetic core middle column 32 and the first magnetic core side column 21 and the second magnetic core side column 22 further optimizes the distribution of the magnetic field, reduces the interference and leakage of the magnetic field, and improves the utilization rate of the magnetic core.

[0043] The first magnetic core middle column 31 and the second magnetic core middle column 32 are both provided with air gaps with different sizes, which helps to adjust the magnetic resistance of the magnetic core and thus control the inductance of the winding. By accurately adjusting the size of the air gap, fine optimization of the performance of the converter can be realized to meet different application requirements.

[0044] The primary winding and the secondary winding are wound on different magnetic core middle columns, and the winding direction and the number of turns are clearly specified. Such winding configuration helps to reduce the mutual inductance interference between the windings, improve the stability and reliability of the converter. At the same time, through reasonable winding design, accurate control of the output voltage and current of the converter can also be realized.

[0045] The structure design adopts a planar magnetic core and a PCB winding terminal, which helps to simplify the manufacturing process of the converter and improve the production efficiency. At the same time, the planar structure is also convenient for maintenance and repair of the converter, and reduces the use cost.

[0046] In summary, the structure design of the phase-shift full-bridge and LLC hybrid converter magnetically integrated planar transformer has many advantages, including improving efficiency, optimizing magnetic circuit layout, flexible air gap design, improving performance of winding configuration, and facilitating manufacturing and maintenance, etc. These advantages make the converter have wide application prospect and important practical value in power conversion system.

[0047] In embodiment 2, the phase-shift full-bridge and LLC hybrid converter magnetically integrated planar transformer has a structure as shown in Figure 2 The phase-shift full-bridge and LLC hybrid converter magnetically integrated planar transformer includes oppositely arranged first magnetic core 11 and second magnetic core 41, and primary winding and secondary winding arranged in sequence between the first magnetic core 11 and the second magnetic core 41. The first magnetic core 11 is provided with first magnetic core center column 31, second magnetic core center column 32, and first magnetic core side column 21 and second magnetic core side column 22. The first magnetic core center column 31 and the second magnetic core center column 32 are arranged between the first magnetic core side column 21 and the second magnetic core side column 22. The first magnetic core center column 31 has an air gap, and the effective cross-sectional area of the first magnetic core center column 31 is the same as that of the first magnetic core side column 21. The second magnetic core center column 32 has an air gap, and the effective cross-sectional area of the second magnetic core center column 32 is the same as that of the second magnetic core side column 22. The air gap size of the first magnetic core center column 31 is different from that of the second magnetic core center column 32. The effective cross-sectional areas of the first magnetic core side column 21 and the second magnetic core side column 22 are the same. The primary winding includes phase-shift full-bridge primary winding Lpps and LLC primary winding Lpllc, and the phase-shift full-bridge secondary winding includes phase-shift full-bridge secondary winding Lsps and LLC secondary winding Lsllc1 and Lsllc2. The phase-shift full-bridge primary winding Lpps is wound on the first magnetic core center column 31 with Np1 turns, the LLC primary winding Lpllc is wound on the second magnetic core center column 32 with Np2 turns, and the winding direction of the phase-shift full-bridge primary winding Lpps is the same as that of the LLC primary winding Lpllc. The phase-shift full-bridge secondary winding Lsps is wound on the first magnetic core center column 31 with Ns1 turns, and the LLC secondary winding Lsllc1 and Lsllc2 are wound on the second magnetic core center column 32 with Ns2 turns each. The winding direction of the phase-shift full-bridge secondary winding Lsps is opposite to that of the phase-shift full-bridge primary winding Lpps, and the winding direction of the LLC secondary winding Lsllc1 and Lsllc2 is opposite to that of the LLC primary winding Lpllc. There are Np1+Ns1 turns of winding on the first magnetic core center column 31, and Np2+2*Ns2 turns of winding on the second magnetic core center column 32.

[0048] In the above structure, the first magnetic core center column 31, the first magnetic core side column 21, the first magnetic core 11, and the second magnetic core 41 constitute a phase-shift full-bridge excitation inductor loop; at the same time, the second magnetic core center column 32, the second magnetic core side column 22, the first magnetic core 11, and the second magnetic core 41 constitute an LLC excitation inductor loop.

[0049] In Example 3, compared with Example 2, the connection mode between windings is increased. The phase-shift full-bridge primary winding Lpps is wound on the middle column 31 of the first magnetic core and has Np1 turns, the LLC primary winding Lpllc is wound on the middle column 32 of the second magnetic core and has Np2 turns, and the winding direction of the phase-shift full-bridge primary winding Lpps is the same as that of the LLC primary winding Lpllc. The phase-shift full-bridge secondary winding Lsps is wound on the middle column 31 of the first magnetic core and has Ns1 turns, the LLC secondary windings Lsllc1 and Lsllc2 are wound on the middle column 32 of the second magnetic core and each has Ns2 turns, and the winding direction of the phase-shift full-bridge secondary winding Lsps is opposite to that of the phase-shift full-bridge primary winding Lpps, and the winding direction of the LLC secondary windings Lsllc1 and Lsllc2 is opposite to that of the LLC primary winding Lpllc. Np1+Ns1 turns of winding are wound on the middle column 31 of the first magnetic core, and Np2+2*Ns2 turns of winding are wound on the middle column 32 of the second magnetic core. The phase-shift full-bridge primary winding Lpps is composed of Np1 turns of winding. If one turn of winding is wound on each layer of PCB, the winding is connected from the first layer of PCB winding terminal 1, each layer of PCB is connected in series, the winding direction is consistent, and the winding of the phase-shift full-bridge primary winding Lpps is ended by connecting to the Np1 layer of PCB winding terminal 2. The LLC primary winding Lpllc is composed of Np2 turns of winding. The winding is connected from the first layer of PCB winding terminal 4, each layer of PCB is connected in series, the winding direction is consistent, and the winding of the LLC primary winding Lpllc is ended by connecting to the Np2 layer of PCB winding terminal 3. The phase-shift full-bridge secondary winding Lsps is composed of Ns1 turns of winding. The winding is connected from the (0.5*Np1+1) layer of PCB winding terminal 5, each layer of PCB is connected in series, the winding direction is consistent, and the winding of the secondary winding Lsx is ended by connecting to the Np1+Ns1 layer of PCB winding terminal 6. The LLC secondary winding Lsllc1 is composed of Ns2 turns of winding. The winding is connected from the (Np2+1) layer of PCB winding terminal 8, each layer of PCB is connected in series, the winding direction is consistent, and the winding of the LLC secondary winding Lsllc1 is ended by connecting to the (Np2+Ns2) layer of PCB winding terminal 7. The LLC secondary winding Lsllc2 is composed of Ns2 turns of winding. The winding is connected from the (Np2+Ns2) layer of PCB winding terminal 10, each layer of PCB is connected in series, the winding direction is consistent, and the winding of the LLC secondary winding Lsllc2 is ended by connecting to the (Np2+2*Ns2) layer of PCB winding terminal 9.

[0050] By the above connection mode, the entire phase-shifted full-bridge and LLC hybrid converter is made of a magnetic integrated planar transformer, which is connected to the phase-shifted full-bridge and LLC hybrid converter and replaces the original phase-shifted full-bridge transformer, LLC transformer and LLC resonant inductor. The specific connection mode is as follows: the terminal 1 of the primary winding Lpps of the phase-shifted full-bridge is connected to point A in Figure 1 , the terminal 2 of the primary winding Lpps of the phase-shifted full-bridge is connected to point B in Figure 1 , the terminal 5 of the secondary winding Lsps of the phase-shifted full-bridge is connected to point E in Figure 1 , the terminal 6 of the secondary winding Lsps of the phase-shifted full-bridge is connected to point F in Figure 1 , the terminal 3 of the primary winding Lpllc of the LLC is connected to point C in Figure 1 , the terminal 4 of the primary winding Lpllc of the LLC is connected to point D in Figure 1 , the terminal 7 of the secondary winding Lsllc1 of the LLC is connected to point G in Figure 1 , the terminal 8 of the secondary winding Lsllc1 of the LLC is connected to point H in Figure 1 , the terminal 9 of the secondary winding Lsllc2 of the LLC is connected to point I in Figure 1 , the terminal 10 of the secondary winding Lsllc1 of the LLC is connected to point J in Figure 1 .

[0051] In example 4, compared with example 2, the magnetic integrated planar transformer coupling mode of the phase-shifted full-bridge and LLC hybrid converter is increased, and the forward coupling magnetic resistance model is shown in Figure 4 , that is, the winding direction of the primary winding Lpps of the phase-shifted full-bridge wound on the middle column 31 of the first magnetic core is opposite to that of the primary winding Lpllc of the LLC wound on the middle column 32 of the second magnetic core. The magnetic flux flowing from the middle column 31 of the first magnetic core to the middle column 32 of the second magnetic core under forward coupling is shown in formula 1.

[0052] (1)

[0053] The forward coupling magnetic resistance model is shown in Figure 5 , that is, the winding direction of the primary winding Lpps of the phase-shifted full-bridge wound on the middle column 31 of the first magnetic core is the same as that of the primary winding Lpllc of the LLC wound on the middle column 32 of the second magnetic core. The magnetic flux flowing from the middle column 31 of the first magnetic core to the middle column 32 of the second magnetic core under reverse coupling is shown in formula 2.

[0054]

[0055] (2)

[0056] It can be concluded from formula 1 and formula 2 that the magnetic flux flowing between the two transformers under reverse coupling is smaller than that under forward coupling.

[0057] ​The application integrates the phase-shift full-bridge transformer, LLC resonant inductor (leakage inductance instead), and LLC transformer into one magnetic core by using magnetic integration technology, so that the volume and loss of the magnetic elements can be further reduced.

[0058] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it, although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that: the specific embodiments of the present application can still be modified or replaced by the equivalent, without departing from the spirit and scope of the present application, any modification or equivalent replacement, which should be covered within the protection scope of the claims of the present application.

Claims

1. A magnetically integrated planar transformer for a phase-shifted full-bridge and LLC hybrid converter, characterized in that, It includes a first magnetic core (11), a second magnetic core (41), a first magnetic core side post (21), a first magnetic core center post (31), a second magnetic core center post (32), and a second magnetic core side post (22); the first magnetic core (11) and the second magnetic core (41) are arranged opposite to each other, and a primary winding and a secondary winding are arranged sequentially between the first magnetic core (11) and the second magnetic core (41); the first magnetic core (11) is provided with a first magnetic core center post (31), a second magnetic core center post (32), a first magnetic core side post (21), and a second magnetic core side post (22); the first magnetic core center post (31) and the second magnetic core center post (32) are arranged between the first magnetic core side post (21) and the second magnetic core side post (22); The primary winding includes the phase-shifted full-bridge primary winding Lpps and the LLC primary winding Lpllc, and the secondary winding includes the phase-shifted full-bridge secondary winding Lsps and the LLC secondary windings Lsllc1 and Lsllc2. The primary winding Lpps of the phase-shifted full-bridge is wound on the first core column (31) with Np1 turns, and the primary winding Lpllc of the LLC is wound on the second core column (32) with Np2 turns. The winding direction of the primary winding Lpps of the phase-shifted full-bridge is the same as that of the primary winding Lpllc of the LLC. The secondary winding Lsps of the phase-shifted full-bridge is wound on the first core column (31) with Ns1 turns, and the secondary windings Lsllc1 and Lsl of the LLC are wound on the same direction. lc2 is wound on the second core column (32) and both are wound with Ns2 turns. The winding direction of the secondary winding Lsps of the phase-shifted full bridge is opposite to that of the primary winding Lpps of the phase-shifted full bridge. The winding directions of the secondary windings Lsllc1 and Lsllc2 of LLC are opposite to those of the primary winding Lpllc of LLC. Np1+Ns1 turns are wound on the first core column (31), and Np2+2*Ns2 turns are wound on the second core column (32).

2. The magnetically integrated planar transformer of a phase-shifted full-bridge and LLC hybrid converter according to claim 1, characterized in that, Both the first magnetic core central column (31) and the second magnetic core central column (32) have air gaps. The effective cross-sectional area of ​​the first magnetic core central column (31) is the same as that of the first magnetic core side column (21), and the effective cross-sectional area of ​​the second magnetic core central column (32) is the same as that of the second magnetic core side column (22). The size of the air gap of the first magnetic core central column (31) is different from that of the second magnetic core central column (32). The effective cross-sectional areas of the first magnetic core side column (21) and the second magnetic core side column (22) are the same.

3. The magnetically integrated planar transformer of a phase-shifted full-bridge and LLC hybrid converter according to claim 1, characterized in that, The primary winding Lpps of the phase-shifted full-bridge consists of Np1 turns. It starts from the first PCB winding terminal 1 and is connected in series with each PCB layer in the same winding direction. The winding ends at the Np1 PCB winding terminal 2.

4. The magnetically integrated planar transformer of a phase-shifting full-bridge and LLC hybrid converter according to claim 1, characterized in that, The primary winding Lpllc of LLC consists of Np2 windings, which are connected starting from the first PCB winding terminal 4. Each PCB layer is connected in series in the same direction, and the winding ends at the Np2 PCB winding terminal 3.

5. A magnetically integrated planar transformer for a phase-shifted full-bridge and LLC hybrid converter according to claim 1, characterized in that, The secondary winding Lsps of the phase-shifted full-bridge consists of Ns1 turns of winding, starting from terminal 5 of the PCB winding of layer 0.5×Np1+1. Each PCB layer is connected in series in the same direction, and the winding ends at terminal 6 of the PCB winding of layer Np1+Ns1.

6. The magnetically integrated planar transformer of a phase-shifted full-bridge and LLC hybrid converter according to claim 1, characterized in that, The secondary winding Lsllc1 of LLC consists of Ns2 turns of winding, starting from terminal 8 of the PCB winding on the Np2+1 layer. Each PCB layer is connected in series to ensure that the winding direction is consistent. The winding of the secondary winding Lsllc1 of LLC ends at terminal 7 of the PCB winding on the Np2+Ns2 layer.

7. A magnetically integrated planar transformer for a phase-shifted full-bridge and LLC hybrid converter according to claim 1, characterized in that, The secondary winding Lsllc2 of LLC consists of Ns2 turns of winding. It starts from the PCB winding terminal 10 of the Np2+Ns2 layer and is connected in series with each PCB layer to ensure that the winding direction is consistent. It ends at the PCB winding terminal 9 of the Np2+2×Ns2 layer.

8. A transformer system, characterized in that, Including a phase-shifting full-bridge and LLC hybrid converter magnetically integrated planar transformer as described in any one of claims 1 to 7.

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