High-frequency transformer based on state perception and active control and control method thereof

Abstract

A high-frequency transformer based on state perception and active control includes: a magnetic core assembly comprising two E-type magnetic cores placed opposite each other; a frame assembly comprising a primary frame fitted in the middle of the central magnetic column of the two E-type magnetic cores; two secondary frames evenly and symmetrically distributed on both sides of the primary frame; a leakage adjustment frame disposed at the interval between the primary frame and one of the secondary frames; a winding assembly comprising a primary winding wound on the primary frame; two secondary windings wound on the two secondary frames respectively; a DC winding wound on the leakage adjustment frame; and an adjustable DC power supply output terminal electrically connected to the DC winding; a state perception module comprising a leakage flux sensing sensor for real-time sensing of leakage flux in the magnetic circuit of the high-frequency transformer; and an active control module comprising a leakage inductance closed-loop control submodule for acquiring leakage flux in the magnetic circuit of the high-frequency transformer, converting the leakage flux into a power supply adjustment signal, sending it to the adjustable DC power supply, and adjusting the adjustable DC power supply.

Description

Technical Field

[0001] This invention relates to the field of high-frequency transformer technology, and in particular to a high-frequency transformer and its control method based on state perception and active control. Background Technology

[0002] High-frequency transformers are crucial electromagnetic components in power systems, and their leakage inductance significantly impacts system performance. In certain applications, high-frequency transformers require substantial leakage inductance. Therefore, to meet customer demands for leakage inductance, the traditional approach involves designers controlling the leakage inductance during the high-frequency transformer design phase by considering the following factors: first, the type of magnetic core; second, the size of the air gap between the cores, as a larger air gap affects magnetic reluctance, leading to greater leakage inductance; and third, the winding method of the primary and secondary windings, which affects magnetic reluctance and consequently, leakage inductance. However, this approach has several drawbacks. First, once the design is complete and the high-frequency transformer is packaged, its leakage inductance becomes a fixed value. During the use of high-frequency transformers, their leakage inductance deviates from the design value due to changes in factors such as rising temperature, but there is no way to adjust it. Secondly, to accurately achieve the leakage inductance value required by the customer, designers need to spend a lot of time exploring and experimentally verifying, but the resulting high-frequency transformer can only have a fixed leakage inductance design value. When the leakage inductance value required by the customer changes, time must be spent exploring and verifying again. Thirdly, in some scenarios, it is difficult to completely and accurately achieve the leakage inductance value required by the customer during the design stage. Therefore, there is an urgent need for a high-frequency transformer that can be based on state perception and active control. Summary of the Invention

[0003] In view of this, it is necessary to provide a high-frequency transformer based on state perception and active control to reduce the design difficulty of high-frequency transformers, make their leakage inductance adjustable, their temperature rise measurable and controllable, and broaden their application range.

[0004] This invention provides a high-frequency transformer based on state perception and active control, comprising: a core assembly, a frame assembly, a winding assembly, an adjustable DC power supply, a state perception module, and an active control module; the core assembly includes: two E-type cores placed opposite each other, with an air gap between the central magnetic columns of the two E-type cores; the frame assembly includes: a primary frame, two secondary frames, and a leakage adjustment frame; the primary frame, secondary frames, and leakage adjustment frame are all sleeved on the central magnetic columns of the two E-type cores; wherein, the primary frame is sleeved in the middle of the central magnetic columns of the two E-type cores; the two secondary frames are evenly and symmetrically distributed on both sides of the primary frame; there is a certain gap between the primary frame and the two secondary frames; the leakage adjustment frame is disposed at the gap between the primary frame and one secondary frame; the winding assembly includes: a primary winding, two secondary windings, and a DC winding; the primary winding is wound on the primary frame; the two secondary windings are respectively... The transformer is wound on two secondary frames; the DC winding is wound on the leakage adjustment frame; the output of the adjustable DC power supply is electrically connected to the DC winding; the state sensing module includes: a leakage flux sensing sensor; the leakage flux sensing sensor is fixedly set in the gap between the primary frame and one secondary frame, symmetrical to the position of the leakage adjustment frame; the leakage flux sensing sensor is used to sense the leakage flux in the magnetic circuit of the high-frequency transformer in real time; the active control module includes: a leakage inductance closed-loop control submodule; the leakage inductance closed-loop control submodule is used to acquire the leakage flux in the magnetic circuit of the high-frequency transformer sensed in real time by the leakage flux sensing sensor, and convert the acquired leakage flux into a power adjustment signal, which is sent to the adjustable DC power supply to adjust the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer; the input of the leakage inductance closed-loop control submodule is communicatively connected to the leakage flux sensing sensor, and the output of the leakage inductance closed-loop control submodule is electrically connected to the adjustable DC power supply.

[0005] Preferably, the high-frequency transformer further includes: a cooling assembly, comprising: a circulating pump, a radiator, a cooling circuit, and a cooling medium; the cooling circuit is disposed in the core assembly and the winding assembly; the inlet of the circulating pump is connected to the outlet of the cooling circuit; the outlet of the circulating pump is connected to the inlet of the radiator; the outlet of the radiator is connected to the inlet of the cooling circuit; the cooling medium circulates in the cooling circuit, the circulating pump, and the radiator.

[0006] The status sensing module also includes: a temperature sensor; the temperature sensor is fixedly installed in the gap between the primary frame and the secondary frame where the leakage flux sensor is located; the temperature sensor and the leakage flux sensor are symmetrically arranged on both sides of the central magnetic column of the E-type magnetic core; the temperature sensor is used to sense the real-time temperature inside the high-frequency transformer.

[0007] The active control module also includes: a temperature closed-loop control submodule and a circulating pump driver; the input of the temperature closed-loop control submodule is communicatively connected to the temperature sensor, and the output of the temperature closed-loop control submodule is communicatively connected to the circulating pump driver; the output of the circulating pump driver is electrically connected to the circulating pump; the temperature closed-loop control submodule is used to acquire the real-time temperature inside the high-frequency transformer sensed by the temperature sensor, convert the acquired real-time temperature into a temperature adjustment signal, and send it to the circulating pump driver. The circulating pump driver adjusts the speed of the circulating pump according to the temperature adjustment signal, thereby adjusting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer.

[0008] Preferably, the leakage inductance closed-loop control submodule includes: a first storage unit, a second storage unit, a real-time leakage flux acquisition unit, a leakage inductance conversion unit, a leakage inductance deviation calculation unit, and a leakage inductance PI control unit;

[0009] The first storage unit is used to store the leakage flux-leakage inductance conversion standard;

[0010] The second storage unit is used to store the leakage inductance setting value of the high-frequency transformer;

[0011] The real-time leakage flux acquisition unit is used to acquire the leakage flux in the high-frequency transformer magnetic circuit as sensed in real time by the leakage flux sensing sensor, and send the acquired leakage flux to the leakage inductance conversion unit; the input end of the real-time leakage flux acquisition unit is communicatively connected to the leakage flux sensing sensor, and the output end of the real-time leakage flux acquisition unit is communicatively connected to the input end of the leakage inductance conversion unit.

[0012] The leakage inductance conversion unit is used to, upon receiving leakage flux sent by the real-time leakage flux acquisition unit, first read the leakage flux-leakage inductance conversion standard stored in the first storage unit, then convert the leakage flux into a leakage inductance value according to the leakage flux-leakage inductance conversion standard, and then send the leakage inductance value to the leakage inductance deviation calculation unit; the input terminal of the leakage inductance conversion unit is communicatively connected to the output terminal of the first storage unit and the output terminal of the real-time leakage flux acquisition unit, respectively.

[0013] The leakage inductance deviation calculation unit, upon receiving the leakage inductance value from the leakage inductance conversion unit, first reads the leakage inductance setting value stored in the second storage unit, then compares the leakage inductance value with the leakage inductance setting value to obtain a leakage inductance deviation signal, and then sends the leakage inductance deviation signal to the leakage inductance PI control unit. The input terminal of the leakage inductance deviation calculation unit is communicatively connected to the output terminal of the leakage inductance conversion unit and the output terminal of the second storage unit, respectively. The output terminal of the leakage inductance deviation calculation unit is communicatively connected to the input terminal of the leakage inductance PI control unit.

[0014] The leakage inductance PI control unit is used to convert the leakage inductance deviation signal sent by the leakage inductance deviation calculation unit into a power supply adjustment signal when it receives the leakage inductance deviation signal. Then it is sent to the adjustable DC power supply to adjust the voltage of the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer. The output terminal of the leakage inductance PI control unit is communicatively connected to the adjustable DC power supply.

[0015] Preferably, the leakage inductance closed-loop control submodule further includes: a leakage inductance standard setting unit; the leakage inductance standard setting unit is used to set the leakage flux-leakage inductance conversion standard and leakage inductance setting value of the high-frequency transformer, and sends the leakage flux-leakage inductance conversion standard to the first storage unit for storage, and sends the leakage inductance setting value to the second storage unit for storage.

[0016] Preferably, the temperature closed-loop control submodule includes: a temperature standard storage unit, a real-time temperature acquisition unit, a temperature deviation calculation unit, and a temperature PI control unit;

[0017] The temperature standard storage unit is used to store the temperature setpoint of the high-frequency transformer.

[0018] The real-time temperature acquisition unit is used to acquire the real-time temperature inside the high-frequency transformer sensed by the temperature sensor, and sends the acquired real-time temperature to the temperature deviation calculation unit; the input terminal of the real-time temperature acquisition unit is communicatively connected to the temperature sensor; the output terminal of the real-time temperature acquisition unit is communicatively connected to the input terminal of the temperature deviation calculation unit.

[0019] The temperature deviation calculation unit is used to first read the temperature setpoint stored in the temperature standard storage unit when it receives the real-time temperature sent by the real-time temperature acquisition unit, then compare the real-time temperature with the temperature setpoint to obtain the temperature deviation signal, and then send the temperature deviation signal to the temperature PI control unit. The input terminal of the temperature deviation calculation unit is communicatively connected to the real-time temperature acquisition unit and the temperature standard storage unit respectively; the output terminal of the temperature deviation calculation unit is communicatively connected to the temperature PI control unit.

[0020] When the temperature PI control unit receives the temperature deviation signal from the temperature deviation calculation unit, it first converts the temperature deviation signal into a temperature adjustment signal, and then sends the temperature adjustment signal to the circulating pump driver. The circulating pump driver adjusts the speed of the circulating pump according to the temperature adjustment signal, thereby adjusting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer.

[0021] Preferably, the temperature closed-loop control submodule further includes: a temperature standard setting unit; the temperature standard setting unit is used to set the temperature setpoint of the high-frequency transformer and send the temperature setpoint to the temperature standard storage unit for storage; the output of the temperature standard setting unit is communicatively connected to the temperature standard storage unit.

[0022] Preferably, the winding assembly further includes: a layer-difference insulation layer; the layer-difference insulation layer is composed of multiple layers of insulating materials with different dielectric constants; the layer-difference insulation layers are respectively disposed between the primary winding and the primary frame, and between the secondary winding and the secondary frame.

[0023] This invention also provides a control method for a high-frequency transformer based on state perception and active control, employing any of the above-described high-frequency transformers based on state perception and active control, comprising the following steps:

[0024] S0. Real-time sensing of leakage flux in the magnetic circuit of the high-frequency transformer and real-time temperature inside the high-frequency transformer through the status sensing module.

[0025] S1. The leakage flux in the magnetic circuit of the high-frequency transformer is acquired in real time through the active control module. The leakage flux is converted into a power adjustment signal by the active control module and sent to the adjustable DC power supply to adjust the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer.

[0026] The active control module acquires the real-time temperature inside the high-frequency transformer; the active control module converts the real-time temperature into a temperature adjustment signal and sends it to the cooling component to adjust the cooling component, thereby changing the temperature of the high-frequency transformer.

[0027] Preferably, step S0 specifically includes:

[0028] The leakage flux in the magnetic circuit of the high-frequency transformer is detected in real time by a leakage flux sensing sensor.

[0029] The real-time temperature inside the high-frequency transformer is sensed by a temperature sensor.

[0030] In step S1, the leakage flux in the magnetic circuit of the high-frequency transformer is acquired in real time by the active control module. The leakage flux is converted into a power adjustment signal by the active control module and sent to the adjustable DC power supply. The adjustable DC power supply is then adjusted to change the leakage inductance of the high-frequency transformer. Specifically, this includes:

[0031] The leakage flux in the high-frequency transformer magnetic circuit is obtained in real time by the leakage flux sensing sensor through the leakage flux closed-loop control submodule.

[0032] The leakage flux is converted into a power adjustment signal by the leakage inductance closed-loop control submodule and sent to the adjustable DC power supply to adjust the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer.

[0033] In step S1, the real-time temperature inside the high-frequency transformer is acquired by the active control module; the real-time temperature is converted into a temperature adjustment signal by the active control module and sent to the cooling component to adjust the cooling component, thereby changing the temperature of the high-frequency transformer. Specifically, this includes:

[0034] The temperature closed-loop control submodule obtains the real-time temperature inside the high-frequency transformer as sensed by the temperature sensor.

[0035] The temperature closed-loop control submodule converts the real-time temperature into a temperature adjustment signal and sends it to the circulating pump driver.

[0036] The circulating pump driver adjusts the cooling components based on the temperature adjustment signal, thereby changing the temperature of the high-frequency transformer.

[0037] Preferably, in step S1, the leakage flux in the high-frequency transformer magnetic circuit is obtained in real time by the leakage flux sensing sensor through the leakage inductance closed-loop control submodule; the leakage flux is converted into a power adjustment signal by the leakage inductance closed-loop control submodule and sent to the adjustable DC power supply to adjust the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer. Specifically, this includes:

[0038] The leakage inductance setting value of the high-frequency transformer is set through the leakage inductance standard setting unit, and the leakage inductance setting value is sent to the first storage unit for storage;

[0039] The leakage flux in the high-frequency transformer magnetic circuit is obtained in real time by the leakage flux sensing sensor through the leakage flux real-time acquisition unit, and the obtained leakage flux is sent to the leakage inductance conversion unit.

[0040] When the leakage flux is received, the leakage flux conversion unit first reads the leakage flux-leakage inductance conversion standard stored in the first storage unit, then converts the leakage flux into a leakage inductance value according to the leakage flux-leakage inductance conversion standard, and then sends the leakage inductance value to the leakage inductance deviation calculation unit.

[0041] When the leakage inductance deviation calculation unit receives the leakage inductance value sent by the leakage inductance conversion unit, it first reads the leakage inductance setting value stored in the second storage unit, then compares the leakage inductance value with the leakage inductance setting value to obtain the leakage inductance deviation signal, and then sends the leakage inductance deviation signal to the leakage inductance PI control unit.

[0042] When the leakage inductance PI control unit receives the leakage inductance deviation signal sent by the leakage inductance deviation calculation unit, it first converts the leakage inductance deviation signal into a power supply adjustment signal, and then sends it to the adjustable DC power supply to adjust the voltage of the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer.

[0043] In step S1, the real-time temperature inside the high-frequency transformer, sensed in real time by the temperature sensor, is obtained through the temperature closed-loop control submodule. This real-time temperature is then converted into a temperature adjustment signal and sent to the circulating pump driver. The circulating pump driver adjusts the cooling components according to the temperature adjustment signal, thereby changing the temperature of the high-frequency transformer. Specifically, this includes:

[0044] The temperature setting value of the high-frequency transformer is set by the temperature standard setting unit, and the temperature setting value is sent to the temperature standard storage unit for storage.

[0045] The real-time temperature inside the high-frequency transformer, sensed by the temperature sensor, is obtained by the real-time temperature acquisition unit, and the acquired real-time temperature is sent to the temperature deviation calculation unit.

[0046] When the temperature deviation calculation unit receives the real-time temperature sent by the real-time temperature acquisition unit, it first reads the temperature set value stored in the temperature standard storage unit, then compares the real-time temperature with the temperature set value to obtain the temperature deviation signal, and then sends the temperature deviation signal to the temperature PI control unit.

[0047] When the temperature PI control unit receives the temperature deviation signal from the temperature deviation calculation unit, it first converts the temperature deviation signal into a temperature adjustment signal, and then sends the temperature adjustment signal to the circulating pump driver.

[0048] The circulating pump driver adjusts the speed of the circulating pump according to the temperature adjustment signal, thereby adjusting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer.

[0049] The aforementioned high-frequency transformer and its control method based on state perception and active control firstly employs an alternating arrangement of secondary and primary windings on the central magnetic column of an E-type magnetic core. By setting the spacing between the primary and secondary windings and the air gap between the two central magnetic columns of the E-type magnetic core, the high-frequency transformer can initially possess a relatively large adjustable range of leakage inductance. Then, by setting a DC winding on the central magnetic column of the E-type magnetic core and using an adjustable DC power supply as the excitation power source for the DC winding, the magnetic field of the high-frequency transformer is such that the primary winding... The DC magnetic field generated by the DC winding is superimposed on the AC magnetic field generated by the primary and secondary windings. During regulation and control, the leakage flux of the high-frequency transformer is sensed in real time by a leakage flux sensing sensor. The leakage flux is collected and converted into a signal by the leakage inductance closed-loop control submodule to obtain a power supply adjustment signal. The voltage of the adjustable DC power supply is adjusted based on the power supply adjustment signal, thereby changing the excitation current of the DC winding, which affects the DC magnetic field generated by the DC winding, and thus affects the leakage magnetic field of the high-frequency transformer, forming a closed-loop control and regulation of the leakage inductance of the high-frequency transformer. On the other hand, the leakage flux... By setting a temperature sensor, the real-time temperature inside the high-frequency transformer is sensed during adjustment and control. The temperature closed-loop control submodule collects and converts the real-time temperature signal to obtain a temperature adjustment signal. This signal is then used to adjust the speed of the circulating pump in the cooling assembly via the circulating pump driver, thereby affecting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer. This brings the temperature back to the set value, restoring the leakage inductance, which has deviated due to temperature rise, to the set range. Compared to existing high-frequency transformers with only a fixed leakage inductance design value, the technical solution provided by this invention firstly allows the high-frequency transformer to have a relatively large adjustable leakage inductance range, providing a basis for adjustable leakage inductance. Secondly, it can collect and adjust the leakage inductance of the high-frequency transformer and the real-time temperature that affects it through closed-loop control. This makes the high-frequency transformer provided by this invention adjustable inductance, with measurable and controllable temperature rise, and has a wider range of applications. It reduces the repetitive design work and difficulty in achieving different leakage inductance values ​​for different high-frequency transformers during the design phase. Through control, it can more accurately meet the customer's requirements for the leakage inductance value of the high-frequency transformer, while controlling the impact of temperature rise on the leakage inductance of the high-frequency transformer. Attached Figure Description

[0050] Figure 1 This is a three-dimensional structural diagram of the magnetic core assembly, the skeleton assembly, and the winding assembly in this invention.

[0051] Figure 2 This is a front view of the magnetic core assembly, skeleton assembly, winding assembly, and state sensing module in this invention.

[0052] Figure 3This is a schematic diagram of the overall connection structure between the leakage inductance closed-loop control submodule and the high-frequency transformer in this invention.

[0053] Figure 4 This is a schematic diagram of the overall connection structure between the temperature closed-loop control submodule and the high-frequency transformer in this invention.

[0054] Figure 5 This is a schematic diagram of the first overall process of the control method for a high-frequency transformer based on state perception and active control in this invention.

[0055] Figure 6 This is a schematic diagram of the second overall process of the control method for a high-frequency transformer based on state perception and active control in this invention.

[0056] Figure 7 This is a schematic diagram of the third overall process of the control method for high-frequency transformers based on state perception and active control in this invention.

[0057] In the diagram: E-type magnetic core 10; central magnetic column 100; primary frame 20; secondary frame 21; leakage adjustment frame 22; primary winding 30; secondary winding 31; DC winding 32; adjustable DC power supply 4; leakage flux sensing sensor 50; temperature sensor 51; leakage inductance closed-loop control submodule 60; first storage unit 600; second storage unit 601; real-time leakage flux acquisition unit 602; leakage inductance conversion unit 603; leakage inductance deviation calculation unit 604; leakage inductance PI control unit 605; leakage inductance standard setting unit 606; temperature closed-loop control submodule 61; temperature standard storage unit 610; real-time temperature acquisition unit 611; temperature deviation calculation unit 612; temperature PI control unit 613; temperature standard setting unit 614; circulating pump 70; radiator 71; cooling circuit inlet 720; cooling circuit outlet 721; circulating pump driver 62. Detailed Implementation

[0058] The technical solutions and effects of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0059] Please refer to Figure 1-3This invention provides a high-frequency transformer based on state perception and active control, comprising: a magnetic core assembly, a frame assembly, a winding assembly, an adjustable DC power supply 4, a state perception module, and an active control module; the magnetic core assembly includes: two E-type magnetic cores 10 placed opposite each other, with an air gap (not shown in the figure) between the central magnetic posts 100 of the two E-type magnetic cores 10; the frame assembly includes: a primary frame 20, two secondary frames 21, and a leakage-adjusting frame 22; the primary frame 20, secondary frames 21, and leakage-adjusting frame... 22 are both sleeved on the central magnetic post 100 of the two E-type magnetic cores 10; wherein, the primary bobbin 20 is sleeved in the middle of the central magnetic post 100 of the two E-type magnetic cores 10; the two secondary bobbins 21 are evenly and symmetrically distributed on both sides of the primary bobbin 20; there is a certain gap between the primary bobbin 20 and the two secondary bobbins 21; the leakage adjustment bobbin 22 is set at the interval between the primary bobbin 20 and one secondary bobbin 21; the winding assembly includes: a primary winding 30, two secondary windings 31 and a DC winding 32; the primary winding 30 is wound on the primary... On the primary frame 20; two secondary windings 31 are wound on the two secondary frames 21 respectively; a DC winding 32 is wound on the leakage adjustment frame 22; the output terminal of the adjustable DC power supply 4 is electrically connected to the DC winding 32; the status sensing module includes: a leakage flux sensing sensor 50; the leakage flux sensing sensor 50 is fixedly disposed in the interval between the primary frame 20 and one secondary frame 21, and is symmetrical to the position of the leakage adjustment frame 22; the leakage flux sensing sensor 50 is used to sense the leakage flux in the magnetic circuit of the high-frequency transformer in real time; the active control module includes The leakage inductance closed-loop control submodule 60 is used to acquire the leakage flux in the magnetic circuit of the high-frequency transformer as sensed in real time by the leakage flux sensing sensor 50, and convert the acquired leakage flux into a power adjustment signal, which is sent to the adjustable DC power supply 4 to adjust the voltage 4 of the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer. The input terminal of the leakage inductance closed-loop control submodule 60 is communicatively connected to the leakage flux sensing sensor 50, and the output terminal of the leakage inductance closed-loop control submodule 60 is electrically connected to the adjustable DC power supply 4.

[0060] In this embodiment, firstly, the secondary winding 31, primary winding 30, and secondary winding 31 are alternately arranged on the central magnetic post 100 of the E-type magnetic core 10. By setting the spacing between the primary winding 30 and the secondary winding 31, and the air gap between the two central magnetic posts 100 of the E-type magnetic core 10, the high-frequency transformer can initially have a relatively large adjustable range of leakage inductance. Then, by setting a DC winding 32 on the central magnetic post 100 of the E-type magnetic core 10, and using an adjustable DC power supply 4 as the excitation power supply for the DC winding 32, the magnetic field of the high-frequency transformer is such that the primary winding... The DC magnetic field generated by the DC winding 32 is superimposed on the AC magnetic field generated by the secondary winding 30 and the secondary winding 31. During adjustment and control, the leakage flux of the high-frequency transformer is sensed in real time by the leakage flux sensing sensor 50, and the leakage flux is collected and the signal is converted by the leakage inductance closed-loop control submodule 60 to obtain the power supply adjustment signal. The voltage of the adjustable DC power supply 4 is adjusted by the power supply adjustment signal, which in turn changes the excitation current of the DC winding 32, affecting the DC magnetic field generated by the DC winding 32, and thus affecting the leakage magnetic field of the high-frequency transformer, forming a closed-loop control and adjustment of the leakage inductance of the high-frequency transformer.

[0061] In this embodiment, the primary winding 30 is wound with Litz wire, and the secondary winding 31 is wound with copper foil; the leakage flux sensing sensor 50 may, but is not limited to, be a tunnel magnetoresistive sensor.

[0062] Furthermore, to control the impact of temperature rise on leakage inductance, please refer to... Figure 2 , 3 4. The high-frequency transformer also includes: a cooling assembly, including: a circulating pump 70, a radiator 71, a cooling circuit (not shown in the figure), and a cooling medium (not shown in the figure); the cooling circuit is disposed in the core assembly and the winding assembly; the inlet of the circulating pump 70 is connected to the outlet of the cooling circuit 721; the outlet of the circulating pump 70 is connected to the inlet of the radiator 71; the outlet of the radiator 71 is connected to the inlet of the cooling circuit 720; the cooling medium circulates in the cooling circuit, the circulating pump 70, and the radiator 71.

[0063] The state sensing module also includes: a temperature sensor 51; the temperature sensor 51 is fixedly installed in the gap between the primary frame 20 and the secondary frame 21 where the leakage flux sensor 50 is located; the temperature sensor 51 and the leakage flux sensor 50 are symmetrically arranged on both sides of the central magnetic column 100 of the E-type magnetic core 10; the temperature sensor 51 is used to sense the real-time temperature inside the high-frequency transformer.

[0064] The active control module also includes: a temperature closed-loop control submodule 61 and a circulating pump driver 62; the input terminal of the temperature closed-loop control submodule 61 is communicatively connected to the temperature sensor 51, and the output terminal of the temperature closed-loop control submodule 61 is communicatively connected to the circulating pump driver 62; the output terminal of the circulating pump driver 62 is electrically connected to the circulating pump 70; the temperature closed-loop control submodule 61 is used to acquire the real-time temperature inside the high-frequency transformer sensed by the temperature sensor 51, convert the acquired real-time temperature into a temperature adjustment signal, and send it to the circulating pump driver 62. The circulating pump driver 62 adjusts the speed of the circulating pump according to the temperature adjustment signal, thereby adjusting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer.

[0065] In this embodiment, by setting a temperature sensor 51, the real-time temperature inside the high-frequency transformer is sensed during adjustment and control. The real-time temperature is collected and converted by the temperature closed-loop control submodule 61 to obtain a temperature adjustment signal. Then, the speed of the circulating pump 70 in the cooling assembly is adjusted by the circulating pump driver 62, which affects the flow rate of the cooling medium, changes the temperature of the high-frequency transformer, and makes its temperature return to the set temperature value, so that the leakage inductance that has deviated due to the temperature rise is restored to the set range.

[0066] In this embodiment, the temperature sensor 51 may be, but is not limited to, a platinum resistance temperature sensor;

[0067] Further, please see Figure 3 In order to achieve closed-loop control of leakage inductance, the leakage inductance closed-loop control submodule 60 includes: a first storage unit 600, a second storage unit 601, a real-time leakage flux acquisition unit 602, a leakage inductance conversion unit 603, a leakage inductance deviation calculation unit 604, and a leakage inductance PI control unit 605.

[0068] The first storage unit 600 is used to store the leakage flux-leakage inductance conversion standard;

[0069] The second storage unit 601 is used to store the leakage inductance setting value of the high-frequency transformer;

[0070] The real-time leakage flux acquisition unit 602 is used to acquire the leakage flux in the high-frequency transformer magnetic circuit sensed in real time by the leakage flux sensing sensor 50, and send the acquired leakage flux to the leakage inductance conversion unit 603; the input end of the real-time leakage flux acquisition unit 602 is communicatively connected to the leakage flux sensing sensor 50, and the output end of the real-time leakage flux acquisition unit 602 is communicatively connected to the input end of the leakage inductance conversion unit 603.

[0071] The leakage inductance conversion unit 603 is used to, when receiving leakage flux sent by the real-time leakage flux acquisition unit 602, first read the leakage flux-leakage inductance conversion standard stored in the first storage unit 600, then convert the leakage flux into a leakage inductance value according to the leakage flux-leakage inductance conversion standard, and then send the leakage inductance value to the leakage inductance deviation calculation unit 604; the input terminal of the leakage inductance conversion unit 603 is communicatively connected to the output terminal of the first storage unit 600 and the output terminal of the real-time leakage flux acquisition unit 602 respectively.

[0072] The leakage inductance deviation calculation unit 604, upon receiving the leakage inductance value sent by the leakage inductance conversion unit 603, first reads the leakage inductance setting value stored in the second storage unit 601, then compares the leakage inductance value with the leakage inductance setting value to obtain a leakage inductance deviation signal, and then sends the leakage inductance deviation signal to the leakage inductance PI control unit 605. The input terminal of the leakage inductance deviation calculation unit 604 is communicatively connected to the output terminal of the leakage inductance conversion unit 603 and the output terminal of the second storage unit 601, respectively. The output terminal of the leakage inductance deviation calculation unit 604 is communicatively connected to the input terminal of the leakage inductance PI control unit 605.

[0073] When the leakage inductance PI control unit 605 receives the leakage inductance deviation signal sent by the leakage inductance deviation calculation unit 604, it first converts the leakage inductance deviation signal into a power supply adjustment signal, and then sends it to the adjustable DC power supply 4 to adjust the voltage of the adjustable DC power supply 4, thereby changing the leakage inductance of the high-frequency transformer; the output terminal of the leakage inductance PI control unit 605 is communicatively connected to the adjustable DC power supply 4.

[0074] In this embodiment, the first storage unit 600 and the second storage unit 601 are implemented by storage chips, the real-time leakage flux acquisition unit 602, the leakage inductance conversion unit 603, and the leakage inductance deviation calculation unit 604 are implemented by digital signal processing chips, such as the DSP28 series digital signal processing chips; the leakage inductance PI control unit 605 is implemented by a PI controller. Through the leakage inductance PI control unit 605, and the real-time acquisition and signal conversion of the leakage flux of the high-frequency transformer, closed-loop acquisition and control of the leakage inductance of the high-frequency transformer are realized until the leakage inductance of the high-frequency transformer is restored to the set value range.

[0075] Further, please see Figure 3 In order to achieve precise closed-loop control of the leakage inductance of the high-frequency transformer and to provide the applicable range of the high-frequency transformer, the leakage inductance closed-loop control submodule 60 also includes: a leakage inductance standard setting unit 606; the leakage inductance standard setting unit 606 is used to set the leakage flux-leakage inductance conversion standard and leakage inductance setting value of the high-frequency transformer, and sends the leakage flux-leakage inductance conversion standard to the first storage unit 600 for storage, and sends the leakage inductance setting value to the second storage unit 601 for storage.

[0076] In this embodiment, the leakage inductance standard setting unit 606 is implemented by a digital signal processing chip, such as a DSP28 series digital signal processing chip. By setting the leakage inductance standard setting unit 606, the high-frequency transformer can set its leakage flux-leakage inductance conversion standard and leakage inductance setting value according to specific application scenarios and requirements, thereby improving the applicability of the high-frequency transformer.

[0077] Further, please see Figure 4 In order to achieve closed-loop control of temperature rise, the temperature closed-loop control submodule 61 includes: a temperature standard storage unit 610, a real-time temperature acquisition unit 611, a temperature deviation calculation unit 612, and a temperature PI control unit 613.

[0078] Among them, the temperature standard storage unit 610 is used to store the temperature set value of the high-frequency transformer;

[0079] The real-time temperature acquisition unit 611 is used to acquire the real-time temperature inside the high-frequency transformer sensed by the temperature sensor 51, and send the acquired real-time temperature to the temperature deviation calculation unit 612; the input terminal of the real-time temperature acquisition unit 611 is communicatively connected to the temperature sensor 51; the output terminal of the real-time temperature acquisition unit 611 is communicatively connected to the input terminal of the temperature deviation calculation unit 612.

[0080] The temperature deviation calculation unit 612, upon receiving the real-time temperature from the real-time temperature acquisition unit 611, first reads the temperature setpoint stored in the temperature standard storage unit 610, then compares the real-time temperature with the temperature setpoint to obtain a temperature deviation signal, and then sends the temperature deviation signal to the temperature PI control unit 613. The input terminals of the temperature deviation calculation unit 612 are communicatively connected to both the real-time temperature acquisition unit 611 and the temperature standard storage unit 610; the output terminal of the temperature deviation calculation unit 612 is communicatively connected to the temperature PI control unit 613.

[0081] When the temperature PI control unit 613 receives the temperature deviation signal sent by the temperature deviation calculation unit 612, it first converts the temperature deviation signal into a temperature adjustment signal, and then sends the temperature adjustment signal to the circulating pump driver 62. The circulating pump driver 62 adjusts the speed of the circulating pump 70 according to the temperature adjustment signal, thereby adjusting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer.

[0082] In this embodiment, the temperature standard storage unit 610 is implemented by a storage chip, the real-time temperature acquisition unit 611 and the temperature deviation calculation unit 612 are implemented by a digital signal processing chip, such as a DSP28 series digital signal processing chip; the temperature PI control unit 613 is implemented by a PI controller; through the temperature PI control unit 613, and the acquisition and signal conversion of the real-time internal temperature of the high-frequency transformer, the real-time acquisition and control of the internal temperature of the high-frequency transformer is realized until the internal temperature of the high-frequency transformer recovers to the set temperature range, thereby restoring the leakage inductance deviation of the high-frequency transformer caused by the temperature rise to the set range.

[0083] Further, please see Figure 4 In order to achieve precise closed-loop control of the internal temperature rise of the high-frequency transformer and improve the applicability of the high-frequency transformer, the temperature closed-loop control submodule 61 also includes: a temperature standard setting unit 614; the temperature standard setting unit 614 is used to set the temperature set value of the high-frequency transformer and send the temperature set value to the temperature standard storage unit 610 for storage; the output terminal of the temperature standard setting unit 614 is communicatively connected to the temperature standard storage unit 610.

[0084] In this embodiment, the temperature standard setting unit 614 is implemented by a digital signal processing chip, such as a DSP28 series digital signal processing chip. By setting the temperature standard setting unit 614, the high-frequency transformer can set the temperature setting value according to specific application scenarios and requirements, thereby improving the applicability of the high-frequency transformer.

[0085] Furthermore, in order to further enable the high-frequency transformer to have a larger adjustable range of leakage inductance and reduce the distributed capacitance between the primary winding 30 and the secondary winding 31, thereby effectively reducing high-frequency discharge and loss, the winding assembly also includes: a layer difference insulation layer (not shown in the figure); the layer difference insulation layer is composed of multiple layers of insulating materials with different dielectric constants; the layer difference insulation layer is respectively disposed between the primary winding 30 and the primary frame 20, and between the secondary winding 31 and the secondary frame 21.

[0086] In this embodiment, the interlayer insulation layer can be selected from, but is not limited to, the following materials: adhesive tape, polyimide film, and epoxy resin composite material.

[0087] Please refer to Figure 5 The present invention also provides a control method for a high-frequency transformer based on state perception and active control, using any of the high-frequency transformers based on state perception and active control as described above, and including the following steps:

[0088] S0. Real-time sensing of leakage flux in the magnetic circuit of the high-frequency transformer and real-time temperature inside the high-frequency transformer through the status sensing module.

[0089] S1. The leakage flux in the magnetic circuit of the high-frequency transformer is acquired in real time through the active control module. The leakage flux is converted into a power adjustment signal through the active control module and sent to the adjustable DC power supply 4. The adjustable DC power supply 4 is adjusted to change the leakage inductance of the high-frequency transformer.

[0090] The active control module acquires the real-time temperature inside the high-frequency transformer; the active control module converts the real-time temperature into a temperature adjustment signal and sends it to the cooling component to adjust the cooling component, thereby changing the temperature of the high-frequency transformer.

[0091] Further, please see Figure 6 Step S0 specifically includes:

[0092] The leakage flux in the magnetic circuit of the high-frequency transformer is detected in real time by the leakage flux sensing sensor 50.

[0093] The temperature sensor 51 is used to detect the real-time temperature inside the high-frequency transformer.

[0094] In step S1, the leakage flux in the magnetic circuit of the high-frequency transformer is acquired in real time by the active control module. The leakage flux is converted into a power adjustment signal by the active control module and sent to the adjustable DC power supply 4. The adjustable DC power supply 4 is then adjusted to change the leakage inductance of the high-frequency transformer. Specifically, this includes:

[0095] The leakage flux in the high-frequency transformer magnetic circuit is obtained in real time by the leakage flux sensing sensor through the leakage flux closed-loop control submodule 60.

[0096] The leakage flux is converted into a power adjustment signal by the leakage inductance closed-loop control submodule 60 and sent to the adjustable DC power supply 4 to adjust the adjustable DC power supply 4, thereby changing the leakage inductance of the high-frequency transformer.

[0097] In step S1, the real-time temperature inside the high-frequency transformer is acquired through the active control module; the real-time temperature is converted into a temperature adjustment signal by the active control module and sent to the cooling component to adjust the cooling component, thereby changing the temperature of the high-frequency transformer. Specifically, this includes:

[0098] The temperature closed-loop control submodule 61 obtains the real-time temperature inside the high-frequency transformer as sensed by the temperature sensor 51.

[0099] The temperature closed-loop control submodule 61 converts the real-time temperature into a temperature adjustment signal and sends it to the circulating pump driver 62.

[0100] The circulating pump driver 62 adjusts the cooling components according to the temperature adjustment signal, thereby changing the temperature of the high-frequency transformer.

[0101] Further, please see Figure 7 In step S1, the leakage flux in the high-frequency transformer magnetic circuit is acquired in real time by the leakage flux sensing sensor 50 through the leakage inductance closed-loop control submodule 60; the leakage flux is converted into a power adjustment signal by the leakage inductance closed-loop control submodule 60 and sent to the adjustable DC power supply 4 to adjust the adjustable DC power supply 4, thereby changing the leakage inductance of the high-frequency transformer. Specifically, this includes:

[0102] The leakage inductance setting value of the high-frequency transformer is set by the leakage inductance standard setting unit 606, and the leakage inductance setting value is sent to the first storage unit 600 for storage.

[0103] The leakage flux in the high-frequency transformer magnetic circuit is obtained in real time by the leakage flux sensing sensor 50 through the real-time leakage flux acquisition unit 602, and the obtained leakage flux is sent to the leakage inductance conversion unit 603.

[0104] When the leakage flux is received, the leakage flux conversion unit 603 first reads the leakage flux-leakage inductance conversion standard stored in the first storage unit 600, then converts the leakage flux into a leakage inductance value according to the leakage flux-leakage inductance conversion standard, and then sends the leakage inductance value to the leakage inductance deviation calculation unit 604.

[0105] When the leakage inductance deviation calculation unit 604 receives the leakage inductance value sent by the leakage inductance conversion unit 603, it first reads the leakage inductance setting value stored in the second storage unit 601, then compares the leakage inductance value with the leakage inductance setting value to obtain the leakage inductance deviation signal, and then sends the leakage inductance deviation signal to the leakage inductance PI control unit 605.

[0106] When the leakage inductance PI control unit 605 receives the leakage inductance deviation signal sent by the leakage inductance deviation calculation unit 604, it first converts the leakage inductance deviation signal into a power supply adjustment signal, and then sends it to the adjustable DC power supply 4 to adjust the voltage of the adjustable DC power supply 4, thereby changing the leakage inductance of the high-frequency transformer.

[0107] In step S1, the temperature closed-loop control submodule 61 acquires the real-time temperature inside the high-frequency transformer sensed by the temperature sensor 51; the temperature closed-loop control submodule 61 converts the real-time temperature into a temperature adjustment signal and sends it to the circulating pump driver 62. The circulating pump driver 62 adjusts the cooling components according to the temperature adjustment signal, thereby changing the temperature of the high-frequency transformer, specifically including:

[0108] The temperature setting value of the high-frequency transformer is set by the temperature standard setting unit 614, and the temperature setting value is sent to the temperature standard storage unit 610 for storage.

[0109] The real-time temperature inside the high-frequency transformer, sensed by the temperature sensor 51, is obtained by the real-time temperature acquisition unit 611, and the obtained real-time temperature is sent to the temperature deviation calculation unit 612.

[0110] When the temperature deviation calculation unit 612 receives the real-time temperature sent by the real-time temperature acquisition unit 611, it first reads the temperature set value stored in the temperature standard storage unit 610, then compares the real-time temperature with the temperature set value to obtain the temperature deviation signal, and then sends the temperature deviation signal to the temperature PI control unit 613.

[0111] When the temperature PI control unit 613 receives the temperature deviation signal sent by the temperature deviation calculation unit 612, it first converts the temperature deviation signal into a temperature adjustment signal, and then sends the temperature adjustment signal to the circulating pump driver 62.

[0112] The circulating pump driver 62 adjusts the rotation speed of the circulating pump 70 according to the temperature adjustment signal, thereby adjusting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer.

[0113] In this embodiment, the first storage unit 600 and the second storage unit 601 are implemented by storage chips, while the leakage inductance standard setting unit 606, the leakage flux real-time acquisition unit 602, the leakage inductance conversion unit 603, and the leakage inductance deviation calculation unit 604 are implemented by digital signal processing chips, such as the DSP28 series digital signal processing chips; the leakage inductance PI control unit 605 is implemented by a PI controller. Through the leakage inductance PI control unit 605, and the real-time acquisition and signal conversion of the leakage flux of the high-frequency transformer, closed-loop acquisition and control of the leakage inductance of the high-frequency transformer are realized until the leakage inductance of the high-frequency transformer is restored to the set value range.

[0114] In this embodiment, the temperature standard storage unit 610 is implemented by a memory chip, and the temperature standard setting unit 613, the real-time temperature acquisition unit 611, and the temperature deviation calculation unit 612 are implemented by a digital signal processing chip, such as a DSP28 series digital signal processing chip; the temperature PI control unit 613 is implemented by a PI controller; through the temperature PI control unit 613, and the acquisition and signal conversion of the real-time internal temperature of the high-frequency transformer, the real-time acquisition and control of the internal temperature of the high-frequency transformer is realized until the internal temperature of the high-frequency transformer recovers to the set temperature range, thereby restoring the leakage inductance deviation of the high-frequency transformer caused by the temperature rise to the set range.

[0115] The aforementioned high-frequency transformer and its control method based on state perception and active control firstly employs an alternating arrangement of secondary winding 31, primary winding 30, and secondary winding 31 on the central magnetic post 100 of the E-type magnetic core 10. By setting the spacing between the primary winding 30 and the secondary winding 31, as well as the air gap between the two central magnetic posts 100 of the E-type magnetic core 10, the high-frequency transformer can initially possess a relatively large adjustable range of leakage inductance. Then, by setting a DC winding 32 on the central magnetic post 100 of the E-type magnetic core 10 and using an adjustable DC power supply 4 as the excitation for the DC winding 32, the transformer is further enhanced. The power supply causes the magnetic field of the high-frequency transformer to be an AC magnetic field generated by the primary winding 30 and the secondary winding 31, superimposed with the DC magnetic field generated by the DC winding 32. During adjustment and control, the leakage flux of the high-frequency transformer is sensed in real time by the leakage flux sensing sensor 50, and the leakage flux is collected and the signal is converted by the leakage inductance closed-loop control submodule 51 to obtain the power supply adjustment signal. The voltage of the adjustable DC power supply 4 is adjusted by the power supply adjustment signal, which in turn changes the excitation current of the DC winding 32, affecting the DC magnetic field generated by the DC winding 32, and thus affecting the leakage magnetic field of the high-frequency transformer, forming a magnetic field that affects the high-frequency transformer. Closed-loop control and regulation of transformer leakage inductance; on the other hand, by setting a temperature sensor 51, during regulation and control, the real-time temperature inside the high-frequency transformer is sensed, and the real-time temperature is collected and converted by the temperature closed-loop control submodule 61 to obtain a temperature adjustment signal. Then, the speed of the circulating pump in the cooling assembly is adjusted by the circulating pump driver 62, which affects the flow rate of the cooling medium, changes the temperature of the high-frequency transformer, and makes its temperature return to the set temperature value, so that the leakage inductance that has deviated due to the temperature rise is restored to the set range; compared with the high-frequency transformers in the prior art that only have a fixed leakage inductance design value. In comparison, the technical solution provided by this invention firstly enables the high-frequency transformer to initially have a larger adjustable range of leakage inductance, providing a basis for adjustable leakage inductance. Secondly, it enables the acquisition and closed-loop control adjustment of the leakage inductance of the high-frequency transformer and the real-time temperature that affects the leakage inductance. This makes the high-frequency transformer provided by this invention adjustable inductance, measurable and controllable temperature rise, and has a wider range of applications. It reduces the repetitive design work and difficulty in the design stage to achieve different leakage inductance values ​​for different high-frequency transformers. Through control, it can more accurately meet the customer's requirements for the leakage inductance value of the high-frequency transformer, while controlling the impact of temperature rise on the leakage inductance of the high-frequency transformer.

[0116] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A high-frequency transformer based on state perception and active control, characterized in that, include: Magnetic core assembly, frame assembly, winding assembly, adjustable DC power supply, status sensing module and active control module; The magnetic core assembly includes: two E-type magnetic cores placed opposite each other, with an air gap between the central magnetic pillars of the two E-type magnetic cores; the frame assembly includes: a primary frame, two secondary frames, and a leakage adjustment frame; the primary frame, secondary frames, and leakage adjustment frame are all fitted onto the central magnetic pillars of the two E-type magnetic cores; the primary frame is fitted onto the middle of the central magnetic pillars of the two E-type magnetic cores; the two secondary frames are evenly and symmetrically distributed on both sides of the primary frame; there is a certain gap between the primary frame and the two secondary frames; the leakage adjustment frame is located at the gap between the primary frame and one secondary frame; the winding assembly includes: a primary winding, two secondary windings, and a DC winding; the primary winding is wound on the primary frame; the two secondary windings are wound on the two secondary frames respectively; the DC winding is wound on the leakage adjustment frame; adjustable DC power output. The terminal is electrically connected to the DC winding; the state sensing module includes: a leakage flux sensing sensor; the leakage flux sensing sensor is fixedly installed in the gap between the primary frame and a secondary frame, symmetrical to the position of the leakage adjustment frame; the leakage flux sensing sensor is used to sense the leakage flux in the magnetic circuit of the high-frequency transformer in real time; the active control module includes: a leakage inductance closed-loop control submodule; the leakage inductance closed-loop control submodule is used to acquire the leakage flux in the magnetic circuit of the high-frequency transformer sensed in real time by the leakage flux sensing sensor, and convert the acquired leakage flux into a power adjustment signal, which is sent to the adjustable DC power supply to adjust the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer; the input terminal of the leakage inductance closed-loop control submodule is communicatively connected to the leakage flux sensing sensor, and the output terminal of the leakage inductance closed-loop control submodule is electrically connected to the adjustable DC power supply; The leakage inductance closed-loop control submodule includes: a first storage unit, a second storage unit, a real-time leakage flux acquisition unit, a leakage inductance conversion unit, a leakage inductance deviation calculation unit, and a leakage inductance PI control unit; The first storage unit is used to store the leakage flux-leakage inductance conversion standard; The second storage unit is used to store the leakage inductance setting value of the high-frequency transformer; The leakage inductance deviation calculation unit, upon receiving the leakage inductance value from the leakage inductance conversion unit, first reads the leakage inductance setting value stored in the second storage unit, then compares the leakage inductance value with the leakage inductance setting value to obtain a leakage inductance deviation signal, and then sends the leakage inductance deviation signal to the leakage inductance PI control unit. The input terminal of the leakage inductance deviation calculation unit is communicatively connected to the output terminal of the leakage inductance conversion unit and the output terminal of the second storage unit, respectively. The output terminal of the leakage inductance deviation calculation unit is communicatively connected to the input terminal of the leakage inductance PI control unit. The leakage inductance PI control unit is used to convert the leakage inductance deviation signal sent by the leakage inductance deviation calculation unit into a power supply adjustment signal when it receives the leakage inductance deviation signal. Then it is sent to the adjustable DC power supply to adjust the voltage of the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer. The output terminal of the leakage inductance PI control unit is communicatively connected to the adjustable DC power supply.

2. The high-frequency transformer based on state perception and active control as described in claim 1, characterized in that, The high-frequency transformer also includes: a cooling assembly, including: a circulating pump, a radiator, a cooling circuit, and a cooling medium; the cooling circuit is located in the core assembly and the winding assembly; the inlet of the circulating pump is connected to the outlet of the cooling circuit; the outlet of the circulating pump is connected to the inlet of the radiator; the outlet of the radiator is connected to the inlet of the cooling circuit; the cooling medium circulates in the cooling circuit, the circulating pump, and the radiator. The status sensing module also includes: a temperature sensor; the temperature sensor is fixedly installed in the gap between the primary frame and the secondary frame where the leakage flux sensor is located; the temperature sensor and the leakage flux sensor are symmetrically arranged on both sides of the central magnetic column of the E-type magnetic core; the temperature sensor is used to sense the real-time temperature inside the high-frequency transformer. The active control module also includes: a temperature closed-loop control submodule and a circulating pump driver; the input of the temperature closed-loop control submodule is communicatively connected to the temperature sensor, and the output of the temperature closed-loop control submodule is communicatively connected to the circulating pump driver; the output of the circulating pump driver is electrically connected to the circulating pump; the temperature closed-loop control submodule is used to acquire the real-time temperature inside the high-frequency transformer sensed by the temperature sensor, convert the acquired real-time temperature into a temperature adjustment signal, and send it to the circulating pump driver. The circulating pump driver adjusts the speed of the circulating pump according to the temperature adjustment signal, thereby adjusting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer.

3. The high-frequency transformer based on state perception and active control as described in claim 1, characterized in that, The real-time leakage flux acquisition unit is used to acquire the leakage flux in the high-frequency transformer magnetic circuit as sensed in real time by the leakage flux sensing sensor, and send the acquired leakage flux to the leakage inductance conversion unit; the input end of the real-time leakage flux acquisition unit is communicatively connected to the leakage flux sensing sensor, and the output end of the real-time leakage flux acquisition unit is communicatively connected to the input end of the leakage inductance conversion unit. The leakage inductance conversion unit is used to first read the leakage flux-leakage inductance conversion standard stored in the first storage unit when it receives the leakage flux sent by the real-time leakage flux acquisition unit. Then, it converts the leakage flux into a leakage inductance value according to the leakage flux-leakage inductance conversion standard, and then sends the leakage inductance value to the leakage inductance deviation calculation unit. The input terminal of the leakage inductance conversion unit is communicatively connected to the output terminal of the first storage unit and the output terminal of the real-time leakage flux acquisition unit.

4. The high-frequency transformer based on state perception and active control as described in claim 3, characterized in that, The leakage inductance closed-loop control submodule also includes: a leakage inductance standard setting unit; the leakage inductance standard setting unit is used to set the leakage flux-leakage inductance conversion standard and leakage inductance setting value of the high-frequency transformer, and sends the leakage flux-leakage inductance conversion standard to the first storage unit for storage, and sends the leakage inductance setting value to the second storage unit for storage.

5. The high-frequency transformer based on state perception and active control as described in claim 2, characterized in that, The temperature closed-loop control submodule includes: a temperature standard storage unit, a real-time temperature acquisition unit, a temperature deviation calculation unit, and a temperature PI control unit; The temperature standard storage unit is used to store the temperature setpoint of the high-frequency transformer. The real-time temperature acquisition unit is used to acquire the real-time temperature inside the high-frequency transformer sensed by the temperature sensor, and sends the acquired real-time temperature to the temperature deviation calculation unit; the input terminal of the real-time temperature acquisition unit is communicatively connected to the temperature sensor; the output terminal of the real-time temperature acquisition unit is communicatively connected to the input terminal of the temperature deviation calculation unit. The temperature deviation calculation unit is used to first read the temperature setpoint stored in the temperature standard storage unit when it receives the real-time temperature sent by the real-time temperature acquisition unit, then compare the real-time temperature with the temperature setpoint to obtain the temperature deviation signal, and then send the temperature deviation signal to the temperature PI control unit. The input terminal of the temperature deviation calculation unit is communicatively connected to the real-time temperature acquisition unit and the temperature standard storage unit respectively; the output terminal of the temperature deviation calculation unit is communicatively connected to the temperature PI control unit. When the temperature PI control unit receives the temperature deviation signal from the temperature deviation calculation unit, it first converts the temperature deviation signal into a temperature adjustment signal, and then sends the temperature adjustment signal to the circulating pump driver. The circulating pump driver adjusts the speed of the circulating pump according to the temperature adjustment signal, thereby adjusting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer.

6. The high-frequency transformer based on state perception and active control as described in claim 5, characterized in that, The temperature closed-loop control submodule also includes: a temperature standard setting unit; the temperature standard setting unit is used to set the temperature setpoint of the high-frequency transformer and send the temperature setpoint to the temperature standard storage unit for storage; the output of the temperature standard setting unit is communicatively connected to the temperature standard storage unit.

7. The high-frequency transformer based on state perception and active control as described in claim 1, characterized in that, The winding assembly also includes: a layer of insulation; the layer of insulation is composed of multiple layers of insulating materials with different dielectric constants; the layer of insulation is disposed between the primary winding and the primary frame, and between the secondary winding and the secondary frame.

8. A control method for a high-frequency transformer based on state perception and active control, employing a high-frequency transformer based on state perception and active control as described in any one of claims 1-7, characterized in that, Includes the following steps: S0. Real-time sensing of leakage flux in the magnetic circuit of the high-frequency transformer and real-time temperature inside the high-frequency transformer through the status sensing module. S1. The leakage flux in the magnetic circuit of the high-frequency transformer is acquired in real time through the active control module. The leakage flux is converted into a power adjustment signal by the active control module and sent to the adjustable DC power supply to adjust the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer. The active control module acquires the real-time temperature inside the high-frequency transformer; the active control module converts the real-time temperature into a temperature adjustment signal and sends it to the cooling component to adjust the cooling component, thereby changing the temperature of the high-frequency transformer.

9. The control method for a high-frequency transformer based on state perception and active control as described in claim 8, characterized in that, Step S0 specifically includes: The leakage flux in the magnetic circuit of the high-frequency transformer is detected in real time by a leakage flux sensing sensor. The real-time temperature inside the high-frequency transformer is sensed by a temperature sensor. In step S1, the leakage flux in the magnetic circuit of the high-frequency transformer is acquired in real time by the active control module. The leakage flux is converted into a power adjustment signal by the active control module and sent to the adjustable DC power supply. The adjustable DC power supply is then adjusted to change the leakage inductance of the high-frequency transformer. Specifically, this includes: The leakage flux in the high-frequency transformer magnetic circuit is obtained in real time by the leakage flux sensing sensor through the leakage flux closed-loop control submodule. The leakage flux is converted into a power adjustment signal by the leakage inductance closed-loop control submodule and sent to the adjustable DC power supply to adjust the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer. In step S1, the real-time temperature inside the high-frequency transformer is acquired by the active control module; the real-time temperature is converted into a temperature adjustment signal by the active control module and sent to the cooling component to adjust the cooling component, thereby changing the temperature of the high-frequency transformer. Specifically, this includes: The temperature closed-loop control submodule obtains the real-time temperature inside the high-frequency transformer as sensed by the temperature sensor. The temperature closed-loop control submodule converts the real-time temperature into a temperature adjustment signal and sends it to the circulating pump driver. The circulating pump driver adjusts the cooling components based on the temperature adjustment signal, thereby changing the temperature of the high-frequency transformer.

10. The control method for a high-frequency transformer based on state perception and active control as described in claim 9, characterized in that, In step S1, the leakage flux in the high-frequency transformer magnetic circuit is obtained in real time by the leakage flux sensing sensor through the leakage flux closed-loop control submodule; the leakage flux is converted into a power adjustment signal by the leakage flux closed-loop control submodule and sent to the adjustable DC power supply to adjust the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer. Specifically, this includes: The leakage inductance setting value of the high-frequency transformer is set through the leakage inductance standard setting unit, and the leakage inductance setting value is sent to the first storage unit for storage; The leakage flux in the high-frequency transformer magnetic circuit is obtained in real time by the leakage flux sensing sensor through the leakage flux real-time acquisition unit, and the obtained leakage flux is sent to the leakage inductance conversion unit. When the leakage flux is received, the leakage flux conversion unit first reads the leakage flux-leakage inductance conversion standard stored in the first storage unit, then converts the leakage flux into a leakage inductance value according to the leakage flux-leakage inductance conversion standard, and then sends the leakage inductance value to the leakage inductance deviation calculation unit. When the leakage inductance deviation calculation unit receives the leakage inductance value sent by the leakage inductance conversion unit, it first reads the leakage inductance setting value stored in the second storage unit, then compares the leakage inductance value with the leakage inductance setting value to obtain the leakage inductance deviation signal, and then sends the leakage inductance deviation signal to the leakage inductance PI control unit. When the leakage inductance PI control unit receives the leakage inductance deviation signal sent by the leakage inductance deviation calculation unit, it first converts the leakage inductance deviation signal into a power supply adjustment signal, and then sends it to the adjustable DC power supply to adjust the voltage of the adjustable DC power supply, thereby changing the leakage inductance of the high-frequency transformer. In step S1, the real-time temperature inside the high-frequency transformer, sensed in real time by the temperature sensor, is obtained through the temperature closed-loop control submodule. This real-time temperature is then converted into a temperature adjustment signal and sent to the circulating pump driver. The circulating pump driver adjusts the cooling components according to the temperature adjustment signal, thereby changing the temperature of the high-frequency transformer. Specifically, this includes: The temperature setting value of the high-frequency transformer is set by the temperature standard setting unit, and the temperature setting value is sent to the temperature standard storage unit for storage. The real-time temperature inside the high-frequency transformer, sensed by the temperature sensor, is obtained by the real-time temperature acquisition unit, and the acquired real-time temperature is sent to the temperature deviation calculation unit. When the temperature deviation calculation unit receives the real-time temperature sent by the real-time temperature acquisition unit, it first reads the temperature set value stored in the temperature standard storage unit, then compares the real-time temperature with the temperature set value to obtain the temperature deviation signal, and then sends the temperature deviation signal to the temperature PI control unit. When the temperature PI control unit receives the temperature deviation signal from the temperature deviation calculation unit, it first converts the temperature deviation signal into a temperature adjustment signal, and then sends the temperature adjustment signal to the circulating pump driver. The circulating pump driver adjusts the speed of the circulating pump according to the temperature adjustment signal, thereby adjusting the flow rate of the cooling medium and changing the temperature of the high-frequency transformer.

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