A design parameter adjustment method and system for a hybrid winding transformer

Abstract

The present invention relates to a design parameter adjustment method and system for a hybrid winding transformer, comprising the following steps: determining the leakage inductance adjustment variable based on the design parameter of the hybrid winding transformer; determining the winding turns design space according to the leakage inductance adjustment variable, analyzing the leakage inductance adjustment range under different primary and secondary winding turns arrangements, and obtaining the leakage inductance adjustment space; determining the leakage inductance adjustment range containing the target leakage inductance value in the leakage inductance adjustment space according to the target leakage inductance value, and obtaining the corresponding winding turns design point; determining the distance of each layer of winding from the upper and lower boundaries of the window according to the winding turns design point, and obtaining the winding design parameters of the hybrid winding transformer. The present invention can be widely used in the fields of power electronics and high-frequency transformers.

Description

Technical Field

[0001] The invention relates to the fields of power electronics and high-frequency transformers, and in particular to a design parameter adjustment method and system for a hybrid winding transformer. Background Art

[0002] Isolated DC-DC converters are widely used in the fields of electrified transportation, satellites, hybrid energy systems, etc. In isolated DC / DC converters, inductance is an important component that directly affects the efficiency and reliability of the converter. For example, in non-resonant converters, the transmission capacity and switching action are affected by the inductance value; in resonant converters, the resonant frequency and quality factor are affected by the inductance value.

[0003] Considering the volume limitation in practical applications, in order to improve the power density of the converter, the leakage inductance integrated in the transformer is usually used as part of the inductance in the circuit. That is, the leakage inductance of the high-frequency transformer will affect the performance and control of the isolated DC / DC converter, and plays a key role in the converter. In order to ensure the good working performance of the isolated DC / DC converter, the leakage inductance needs to be adjusted to the specified value for the circuit with specific parameters.

[0004] However, the common transformer leakage inductance adjustment methods currently have problems such as limited application scope, single adjustment dimension, small adjustment range, and difficulty in continuous adjustment. For example, adjusting the number of winding turns to achieve leakage inductance adjustment will not only affect the transformation ratio and magnetic field strength, but also fail to achieve continuous adjustment. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to address the problem of leakage inductance adjustment that is difficult to achieve in high-frequency transformers, and to propose a method and system for adjusting the design parameters of the leakage inductance of a hybrid winding high-frequency transformer.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a method for adjusting design parameters of a hybrid winding transformer, comprising the following steps:

[0008] Based on the design parameters of the hybrid winding transformer, the leakage inductance adjustment variable is determined;

[0009] Determine the winding turns design space according to the leakage inductance adjustment variable, analyze the leakage inductance adjustment range under different primary and secondary winding turns arrangements, and obtain the leakage inductance adjustment space;

[0010] According to the target leakage inductance value, a leakage inductance adjustment range in the leakage inductance adjustment space that includes the target leakage inductance value is determined to obtain a corresponding winding turns design point;

[0011] The distances between each layer of winding and the upper and lower boundaries of the window are determined according to the design point of the number of winding turns, and the winding design parameters of the hybrid winding transformer are obtained.

[0012] Further, the leakage inductance adjustment variable is determined based on the design parameters of the hybrid winding transformer, including:

[0013] Based on the design parameters of the hybrid winding transformer, the number of turns of each primary winding, the number of turns of each secondary winding, and the distance between each winding and the upper boundary of the transformer core window are used as adjustment variables for the transformer leakage inductance value.

[0014] The total number of turns of the primary and secondary windings during transformer design is taken as a constraint to simplify the determined adjustment variables.

[0015] Further, the winding turns design space is determined according to the leakage inductance adjustment variable, and the leakage inductance adjustment range under different primary and secondary winding turns arrangements is analyzed to obtain the leakage inductance adjustment space, including:

[0016] According to the total turns of the primary and secondary windings of the transformer, the winding turns design space composed of the turns variables of the primary and secondary windings of each layer is obtained;

[0017] Based on the design space of winding turns, the leakage inductance adjustment range under different arrangements of primary and secondary winding turns is analyzed;

[0018] Based on the leakage inductance adjustment range under different primary and secondary winding turns arrangements, the winding turns design space composed of the primary and secondary winding turns variables of each layer is mapped to the leakage inductance adjustment space.

[0019] Furthermore, the leakage inductance adjustment range under different primary and secondary winding turn arrangements is analyzed based on the winding turns design space, including:

[0020] For each winding turn design point in the winding turn design space, the distances between each layer of winding and the upper and lower boundaries of the window are continuously adjusted to obtain multiple sets of design parameters;

[0021] Calculate the leakage inductance value corresponding to each set of design parameters;

[0022] Based on the obtained maximum and minimum values ​​of the leakage inductance, the leakage inductance adjustment range corresponding to each winding turns design point is determined.

[0023] Further, the calculation of the leakage inductance value corresponding to each set of design parameters includes:

[0024] Based on the design parameters of the hybrid winding transformer, the three-dimensional magnetic field of the hybrid winding transformer is decomposed into several transverse magnetic fields and longitudinal magnetic fields inside and outside the window.

[0025] Based on the transverse magnetic fields and longitudinal magnetic fields inside and outside the window, the three-dimensional total leakage magnetic energy of the hybrid winding transformer is calculated;

[0026] According to the three-dimensional total leakage magnetic energy of the hybrid winding transformer, the leakage inductance calculation result of the hybrid winding transformer is calculated.

[0027] Furthermore, based on the design parameters of the hybrid winding transformer, the three-dimensional magnetic field of the hybrid winding transformer is decomposed into a plurality of transverse magnetic fields and longitudinal magnetic fields inside and outside the window, including:

[0028] The dual 2D model is used to decompose the 3D magnetic field of the hybrid winding transformer into 2D magnetic fields with multiple layers of hybrid windings inside and outside the window.

[0029] According to the superposition theorem, the two-dimensional magnetic field with multiple layers of hybrid windings inside and outside the window is decomposed into several two-dimensional magnetic fields with single layers of hybrid windings.

[0030] Taking the window height direction and window width direction of the hybrid winding transformer as the longitudinal and transverse directions, according to the property of decoupling analysis of magnetic field energy, the two-dimensional magnetic field of each single-layer hybrid winding inside and outside the window is decomposed into several transverse magnetic fields and longitudinal magnetic fields.

[0031] Further, the method of determining a leakage inductance adjustment range that includes the target leakage inductance value in the leakage inductance adjustment space according to the target leakage inductance value, and obtaining a corresponding winding turns design point, includes:

[0032] According to the target leakage inductance value L σobj , determine the leakage inductance adjustment range that includes the target leakage inductance value in the leakage inductance adjustment space;

[0033] Based on the determined leakage inductance adjustment range, determine the corresponding winding turns design point (N 12 ,N 22 ) k .

[0034] In a second aspect, the present invention provides a design parameter adjustment system for a hybrid winding transformer, comprising:

[0035] An adjustment variable determination module, used for determining a leakage inductance adjustment variable of the hybrid winding transformer based on design parameters thereof;

[0036] A leakage inductance adjustment space determination module is used to design the space according to the number of winding turns, analyze the leakage inductance adjustment range under different primary and secondary winding turn arrangements, and obtain the leakage inductance adjustment space;

[0037] A winding turns design point determination module is used to determine a leakage inductance adjustment range that includes the target leakage inductance value in the leakage inductance adjustment space according to the target leakage inductance value, and obtain a corresponding winding turns design point;

[0038] The design parameter determination module is used to determine the distances of each layer of winding from the upper and lower boundaries of the window according to the design point of the number of winding turns, and obtain the winding design parameters of the hybrid winding transformer.

[0039] In a third aspect, the present invention provides a computer-readable storage medium storing one or more programs, wherein the one or more programs include instructions, which, when executed by a computing device, cause the computing device to perform any method.

[0040] In a fourth aspect, the present invention provides a computing device comprising: one or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include instructions for executing any method.

[0041] The present invention adopts the above technical solution, which has the following advantages:

[0042] 1. The present invention determines the leakage inductance adjustment variable of the hybrid winding transformer, obtains the continuous leakage inductance adjustment space corresponding to the leakage inductance adjustment variable, and determines the specific design parameters of the hybrid winding transformer based on the target leakage inductance value.

[0043] 2. Based on the dual two-dimensional model and superposition theorem, the present invention simplifies the three-dimensional leakage magnetic energy calculation problem of the multi-layer hybrid winding transformer into the two-dimensional magnetic field of the single-layer hybrid winding, and then further decomposes the two-dimensional magnetic field, so that the leakage inductance value calculation method of the present invention has a wide range of applications.

[0044] 3. The present invention decomposes the three-dimensional magnetic leakage energy of the multi-layer hybrid winding transformer and calculates the magnetic leakage energy in each area respectively. Compared with the conventional finite element analysis method or numerical method, the calculation accuracy is higher and the speed is faster.

[0045] The present invention can be widely applied to the fields of power electronics and high-frequency transformers. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to represent the same components. In the accompanying drawings:

[0047] Figure 1 is a flow chart of a method for adjusting design parameters of a hybrid winding transformer provided by an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of a hybrid winding arrangement of a transformer provided in an embodiment of the present invention;

[0049] Figure 3 is a flow chart of an analytical calculation method for a leakage inductance value of a hybrid winding transformer provided by an embodiment of the present invention;

[0050] Figure 4 is a three-dimensional structure of a transformer provided by an embodiment of the present invention;

[0051] Figure 5 It is a schematic diagram of decoupling analysis of a two-dimensional magnetic field of a single-layer hybrid winding transformer provided by an embodiment of the present invention;

[0052] Figure 6 is a schematic diagram of a two-dimensional magnetic field in a window of a multi-layer hybrid winding transformer provided by an embodiment of the present invention;

[0053] Figure 7 It is a schematic diagram of decoupling analysis of a two-dimensional magnetic field of a single-layer hybrid winding transformer provided by an embodiment of the present invention;

[0054] Figure 8 It is the decoupling analysis result of the two-dimensional magnetic field in the window of the multilayer hybrid winding transformer provided by the embodiment of the present invention;

[0055] Fig. 9 It is a flow chart for calculating the total magnetic field leakage energy composed of multiple one-dimensional magnetic fields in the same direction provided by an embodiment of the present invention;

[0056] Fig.10 is a schematic diagram of the interval division of the transverse magnetic field in the window width direction provided by an embodiment of the present invention;

[0057] Fig.11 It is a schematic diagram of the interval division of the longitudinal magnetic field in the window height direction provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0060] In some embodiments of the present invention, a method for adjusting design parameters of a hybrid winding transformer is provided. The method first determines the leakage inductance adjustment variable of the transformer and simplifies it; then, the leakage inductance adjustment space is determined using the winding turns design space corresponding to the leakage inductance adjustment variable; finally, the winding turns design point is determined based on the target leakage inductance value, and all layout parameters of the transformer are obtained according to the winding turns design point.

[0061] Correspondingly, in some other embodiments of the present invention, a design parameter adjustment system, device and storage medium for a hybrid winding transformer are provided.

[0062] Example 1

[0063] like Figure 1 As shown, this embodiment provides a method for adjusting design parameters of a hybrid winding transformer, comprising the following steps:

[0064] S1. Based on the design parameters of the hybrid winding transformer, determine its leakage inductance adjustment variable.

[0065] In this embodiment, the method for determining the leakage inductance adjustment variable includes the following steps:

[0066] S1.1. Based on the design parameters of the hybrid winding transformer, the number of turns of each primary winding layer, the number of turns of each secondary winding layer, and the distance between each winding layer and the upper boundary of the transformer core window are used as adjustment variables for the transformer leakage inductance value.

[0067] Specifically, the design parameters of the hybrid winding transformer mainly include the basic structure of the hybrid winding transformer, the core model, the winding model, the total number of turns of the primary and secondary windings, the number of turns of each layer of the primary and secondary windings, and the distance between each layer of windings and the upper and lower boundaries of the transformer core window. When the basic structure of the hybrid winding transformer, the core model, the winding model, the total number of turns of the primary and secondary windings, and other design parameters are determined, the leakage inductance value of the hybrid winding transformer can be adjusted by changing the number of turns of each layer of the primary and secondary windings and the distance between each layer of windings and the upper and lower boundaries of the transformer core window. Therefore, in this embodiment, the number of turns of each layer of the primary and secondary windings and the distance between each layer of windings and the upper and lower boundaries of the transformer core window are used as leakage inductance adjustment variables.

[0068] S1.2. Using the total number of turns of the primary and secondary windings during transformer design as a constraint, simplify the adjustment variables determined in step S1.1.

[0069] S2. Determine the winding turns design space according to the leakage inductance adjustment variable, analyze the leakage inductance adjustment range under different primary and secondary winding turns arrangements, and obtain the leakage inductance adjustment space.

[0070] Specifically, the steps include:

[0071] S2.1. According to the total turns of the primary and secondary windings of the transformer, a winding turns design space consisting of the variables of the turns of the primary and secondary windings of each layer is obtained.

[0072] S2.2. Based on the design space of winding turns, analyze the leakage inductance adjustment range under different arrangements of primary and secondary winding turns.

[0073] Specifically, the analysis method includes: for each winding turn design point in the winding turn design space, continuously adjusting the distance between each layer of winding and the upper and lower boundaries of the window to obtain the corresponding leakage inductance adjustment range, that is, in each group of turns N 12 、N 22 If determined, adjust l 12 , l 13 , different leakage inductance values ​​will be obtained. The leakage inductance adjustment range is determined according to the maximum and minimum values ​​of all leakage inductance values. The actual leakage inductance of the transformer corresponding to each design point in the winding turns design space can be continuously adjusted within the leakage inductance adjustment range.

[0074] S2.3. Based on the leakage inductance adjustment range under different primary and secondary winding turn arrangements, the winding turn design space composed of the primary and secondary winding turn variables of each layer is mapped to the leakage inductance adjustment space.

[0075] S3. According to the target leakage inductance value, determine a leakage inductance adjustment range in the leakage inductance adjustment space that includes the target leakage inductance value, and obtain a corresponding winding turns design point.

[0076] Specifically, the steps include:

[0077] S3.1. According to the target leakage inductance value L σobj , determine the leakage inductance adjustment range that includes the target leakage inductance value in the leakage inductance adjustment space.

[0078] For the transformer target leakage inductance value L σobj , if at least one leakage inductance adjustment range in the winding turns design space includes L σobj , then at least one leakage inductance adjustment range (L σmin ,L σmax ) k In particular, if there are multiple leakage inductance adjustment ranges, multiple groups of l can be obtained respectively. 12 , l 13 , according to l 12 and l 13 Analyze the actual engineering difficulty to determine the final design point.

[0079] S3.2. Based on the determined leakage inductance adjustment range, determine the corresponding winding turns design point (N 12 ,N 22 ) k .

[0080] S4. Determine the distances of each layer of winding from the upper and lower boundaries of the window according to the design point of the number of winding turns, and obtain the winding design parameters of the hybrid winding transformer.

[0081] Example 2

[0082] This embodiment further introduces the content of Embodiment 1 with a specific case.

[0083] (1) For a hybrid winding transformer with certain design parameters, determine the leakage inductance adjustment variable.

[0084] like Figure 2 As shown, it is assumed that in the hybrid winding transformer, the innermost layer is the primary winding N 11 , and the remaining layers are all hybrid windings. In this embodiment, the number of turns N of the second primary winding is selected 12 、N turns of the second layer secondary winding 22 、N turns of the third layer primary winding 13 、N turns of the third layer secondary winding 23 , the distance between the second layer winding and the upper boundary of the window is l 12 And the distance between the third layer winding and the upper boundary of the window is l 13 As the leakage inductance adjustment variable of the transformer. Among them, the distance from the upper boundary of the window is l 12 and l 13 After the determination, the distance between the winding and the lower boundary of the window can be calculated by the window height, winding turns, and diameter. Since the total number of turns of the primary and secondary windings is determined in the design parameters of the hybrid winding transformer, the above leakage inductance adjustment variables meet the following constraints:

[0085] N 12 +N 13 =const1

[0086] N 22 +N 23 =const2

[0087] Based on the above constraints, the six leakage inductance adjustment variables of the transformer can be simplified to the number of turns N of the second primary winding: 12 、N turns of the second layer secondary winding 22 , the distance between the second layer winding and the upper boundary of the window is l 12 、The distance between the third layer winding and the upper boundary of the window is l 13 There are 4 variables in total. Among them, const1 and const2 represent the total number of turns of the primary winding and the total number of turns of the secondary winding respectively.

[0088] (2) According to the design space of the number of winding turns, the leakage inductance adjustment range under different arrangements of the number of primary and secondary winding turns is analyzed to obtain the leakage inductance adjustment space.

[0089] The analysis method includes: for each winding turn design point in the winding turn design space, continuously adjusting the distance between each layer of windings and the upper and lower boundaries of the window to obtain multiple groups of design parameters, calculating the leakage inductance value corresponding to each group of design parameters, and determining the leakage inductance adjustment range corresponding to each winding turn design point based on the maximum and minimum values ​​of the leakage inductance values ​​obtained.

[0090] Specifically, Figure 3 As shown, this embodiment uses the following method to calculate the leakage inductance value corresponding to each set of design parameters:

[0091] (2.1) Based on the design parameters of the hybrid winding transformer, the three-dimensional magnetic field of the hybrid winding transformer is decomposed into several transverse magnetic fields and longitudinal magnetic fields inside and outside the window.

[0092] like Figure 4 As shown, it is a three-dimensional structure diagram of a hybrid winding transformer, and its leakage inductance value can be obtained by calculating the leakage magnetic energy in the air and winding areas. In this embodiment, a dual two-dimensional model is used to simplify the three-dimensional leakage magnetic energy calculation problem, including:

[0093] (2.1.1) The dual two-dimensional model is used to decompose the three-dimensional magnetic field of the hybrid winding transformer into two-dimensional magnetic fields with multiple layers of hybrid windings inside and outside the window.

[0094] (2.1.2) According to the superposition theorem, the two-dimensional magnetic field with multiple layers of hybrid windings inside and outside the window is decomposed into several two-dimensional magnetic fields with single-layer hybrid windings.

[0095] (2.1.3) Taking the window height direction and window width direction of the hybrid winding transformer as the longitudinal and transverse directions, according to the property that the magnetic field energy can be decoupled for analysis, the two-dimensional magnetic field of each single-layer hybrid winding inside and outside the window is decomposed into several transverse magnetic fields and longitudinal magnetic fields.

[0096] Specifically, Figures 5 to 8 As shown, based on the superposition theorem and the properties of decoupling analysis of magnetic field energy, the two-dimensional magnetic field in the window is decomposed into:

[0097] like Figure 5 As shown, for a single-layer hybrid winding transformer, the three-dimensional magnetic field of the single-layer hybrid winding transformer is simplified into a double two-dimensional magnetic field using a double two-dimensional model, and then the double two-dimensional magnetic field is decoupled and analyzed to obtain the longitudinal magnetic field A1 and two transverse magnetic fields B1 and C1.

[0098] like Figure 6 to Figure 8As shown in the figure, for a multi-layer hybrid winding transformer, it is assumed that the transformer has three layers of windings in the direction of the window width, the innermost layer is the primary winding, and the rest are hybrid windings consisting of the primary and secondary windings. First, the three-dimensional magnetic field of the multi-layer hybrid winding transformer is simplified into a double two-dimensional magnetic field with multi-layer hybrid windings using a double two-dimensional model; then, the two-dimensional magnetic field M with multi-layer hybrid windings is decomposed into two two-dimensional magnetic fields M1 and M2 with single-layer hybrid windings ( Figure 6 ); then, due to the magnetomotive force of the innermost winding, two situations may occur - positive or negative ( Figure 7 ); This embodiment is introduced by taking the innermost winding magnetomotive force as an example, assuming that -N 22 I2-N 12 I1≥0, -N 23 I2-N 13 I1≥0, the two-dimensional magnetic field in the window can be decomposed into six magnetic fields, including two longitudinal magnetic fields A1 and A2 and four transverse magnetic fields B1, B2, C1, and C2; among them, N 12 、N 13 Respectively represent the number of primary winding turns in the second and third layers of the hybrid winding transformer, N 22 、N 23 Respectively represent the secondary winding turns in the second and third layers of the hybrid winding transformer, I1 and I2 represent the primary and secondary winding currents, respectively. Figure 8 ).

[0099] (2.2) Based on the transverse magnetic fields and longitudinal magnetic fields inside and outside the window, the three-dimensional total leakage magnetic energy of the hybrid winding transformer is calculated.

[0100] Specifically, the steps include:

[0101] (2.2.1) Based on the transverse magnetic fields and longitudinal magnetic fields in the window, the leakage magnetic energy per unit length of the total transverse magnetic field obtained by superimposing all the transverse magnetic fields in the window and the total longitudinal magnetic field obtained by superimposing all the longitudinal magnetic fields are calculated.

[0102] Taking the two-dimensional magnetic field analysis in the window as an example, the following steps are included:

[0103] Firstly, in order to consider the reduction of magnetomotive force outside the winding due to the winding height being smaller than the window, Rockwell equivalent height is introduced to perform the equivalent of each transverse magnetic field and longitudinal magnetic field.

[0104] Secondly, based on the magnetomotive force of each equivalent transverse magnetic field and longitudinal magnetic field, the leakage magnetic energy per unit length of the total transverse magnetic field obtained by superimposing all transverse magnetic fields inside and outside the window and the total longitudinal magnetic field obtained by superimposing all longitudinal magnetic fields are calculated respectively.

[0105] like Fig. 9As shown, assuming that the window height direction is y and the window width direction is x, the calculation process of the leakage magnetic energy of the total transverse magnetic field per unit length includes the following steps:

[0106] ① The inflection points and zero-crossing points of the magnetomotive force in each transverse magnetic field B1, C1, B2, and C2 are sorted by value and used as interval nodes, and the transverse magnetic field is divided into n1 intervals (l i ,l i+1 )(i=1,…,n1); where l i is the interval node coordinate, and the division result is as follows Fig.10 As shown;

[0107] ②Let i = 1, and let y start = l i ,y end = l i+1 ;

[0108] ③In the interval y start ≤y <y end The transverse magnetic field is divided into n2 intervals in the x-axis direction according to the superposition situation, and the coordinates of the interval nodes are d i,j (j=1,…,n 2,i );

[0109] ④Let j = 1, and let x start =d i,j , x end =d i,j+1 ;

[0110] ⑤In x start ≤x <x end ;y start ≤y <y end In the rectangular area, determine the superposition of the transverse magnetic field, calculate the transverse magnetic field distribution, and integrate to obtain the leakage magnetic energy W σ,tran,pu,i,j ;

[0111] Among them, when l i ≤y <l i+1 And d i,j ≤x <d i,j+1 When , the transverse magnetic field intensity is evenly distributed in the x-axis direction and linearly distributed in the y-axis direction. i ≤y <l i+1 ,d i,j ≤x <d i,j+1 The transverse magnetic leakage energy per unit length in the} can be calculated as follows:

[0112]

[0113] Among them, H start(i,j) , H end(i,j)Respectively represent x=d i,j ,x=d i,j+1 The total transverse magnetic field strength at .

[0114] ⑥ Determine whether j reaches n 2,i If not, then add 1 to j and return to step ⑤ until j = n 2,i Stop iteration when

[0115] ⑦ Determine whether i reaches n1. If not, add 1 to i and return to step ② until i=n1 and stop iterating;

[0116] ⑧To W σ,tran,pu,i,j Sum the total transverse magnetic field leakage energy per unit length and calculate it as:

[0117]

[0118] Similarly, the calculation process of the total longitudinal magnetic field leakage magnetic energy per unit length is:

[0119] ① The inflection points and zero-crossing points of the magnetomotive force in the longitudinal magnetic fields A1 and A2 are sorted by value and used as interval nodes, and the longitudinal magnetic field is divided into n1 intervals (d i ,d i+1 )(i=1,…,n1); where (d i ,d i+1 ) is the equivalent Rockwell height h of the longitudinal magnetic field eq(mf) (d i ≤x <d i+1 ) is the window height h w , the division results are as follows Fig.11 As shown;

[0120] ②Let i = 1, and let x start =d i , x end =d i+1 ;

[0121] ③In the interval x start ≤x <x end The longitudinal magnetic field is divided into n2 intervals in the y-axis direction according to the superposition situation, and the coordinates of the interval nodes are l i,j (j=1,…,n 2,i );

[0122] ④Let j = 1, and let y start = l i,j ,y end = l i,j+1 ;

[0123] ⑤In x start ≤x <x end ;ystart ≤y <y end In the rectangular area, determine the superposition of the longitudinal magnetic field and calculate the leakage magnetic energy W σ,long,pu,i,j ;

[0124] The variable longitudinal magnetic field intensity is defined as being uniformly distributed in the y-axis direction and linearly distributed in the x-axis direction. i ≤x <d i+1 ,l i,j ≤y <l i,j+1 The longitudinal magnetic leakage energy per unit length of} is as follows:

[0125]

[0126] In the formula, H start(i,j) , H end(i,j) Respectively represent y = l i,j ,y=l i,j+1 The total longitudinal magnetic field strength at ;

[0127] ⑥ Determine whether j reaches n 2,i If not, then add 1 to j and return to step ⑤ until j = n 2,i Stop iteration when

[0128] ⑦ Determine whether i reaches n1. If not, add 1 to i and return to step ② until i=n1 and stop iterating;

[0129] ⑧To W σ,tran,pu,i,j Sum the total transverse magnetic field leakage energy per unit length and calculate it as:

[0130]

[0131] (2.2.2) Based on the transverse magnetic fields and longitudinal magnetic fields outside the window, the total transverse magnetic field obtained by superimposing all the transverse magnetic fields outside the window and the total longitudinal magnetic field obtained by superimposing all the longitudinal magnetic fields are calculated to obtain the leakage magnetic energy per unit length.

[0132] The calculation method for the leakage magnetic energy of the plane outside the window is the same as that of the plane inside the window. It only needs to adjust the Rockwell equivalent height and Rockwell equivalent width to obtain the leakage magnetic energy W per unit length of the total longitudinal magnetic field outside the window. σ,long,OW , the leakage magnetic energy per unit length of the total transverse magnetic field outside the window W σ,tran,OW .

[0133] (2.2.3) Based on the total transverse magnetic field and the total longitudinal magnetic field leakage energy per unit length obtained inside and outside the window, a weighted calculation is performed according to the winding length to obtain the three-dimensional total leakage magnetic energy of the hybrid winding transformer.

[0134] Specifically, the steps include:

[0135] Determine the weights of the total transverse magnetic field in the window, the total longitudinal magnetic field in the window, the total transverse magnetic field outside the window, and the total longitudinal magnetic field outside the window according to the winding length;

[0136] The determined weights are compared with the total longitudinal magnetic field leakage energy per unit length W in the window. σ,long,IW , the total transverse magnetic field leakage energy per unit length in the window W σ,tran,IW , the leakage magnetic energy per unit length of the total longitudinal magnetic field outside the window W σ,long,OW , and the leakage magnetic energy per unit length of the total transverse magnetic field outside the window W σ,tran,OW Corresponding weighted calculation, the three-dimensional total leakage magnetic energy W of the hybrid winding transformer is obtained σ .

[0137] (2.3) Based on the three-dimensional total leakage magnetic energy of the hybrid winding transformer, the leakage inductance calculation result of the hybrid winding transformer is calculated.

[0138] Leakage inductance value L of hybrid winding transformer σ For: L σ =2W σ / I1 2 .

[0139] (3) According to the target leakage inductance value, a leakage inductance adjustment range that includes the target leakage inductance value is determined in the leakage inductance adjustment space, and a corresponding winding turns design point is obtained.

[0140] Specifically in this embodiment, firstly, according to the total number of turns of the primary and secondary windings of the transformer, the number of turns N of the winding is obtained. 12 、N 22 The winding turns design space is determined; then, the leakage inductance adjustment range under different primary and secondary winding turns arrangements is analyzed, and the winding turns N 12 、N 22 The determined winding turns design space is mapped to the leakage inductance adjustment space. Assuming that the i-th winding turns design point (N 12 ,N 22 ) i Mapped to the leakage inductance adjustment space is (L σmin ,L σmax ) i , where L σmin and L σmax Respectively represent the i-th winding turns design point (N 12 ,N 22 ) i The corresponding upper and lower bounds of the leakage inductance adjustment range.

[0141] (4) According to the design point of the number of winding turns, the distance between each layer of winding and the upper and lower boundaries of the window is determined to obtain the transformer winding design parameters.

[0142] Specifically in this embodiment, based on the winding turns design point (N 12 ,N 22 ) k The number of turns of the primary and secondary windings of each layer is determined by adjusting l 12 ,l 13 The transformer leakage inductance value can be accurately adjusted to L σobj , for example, for l 12 and l 13 Perform scanning analysis to obtain the corresponding leakage inductance calculation results, a set of l 12 , l 13 The corresponding leakage inductance value can be regarded as a design point, and the l corresponding to the design point whose matching leakage inductance value is closest to the target leakage inductance value is found. 12 and l 13 The leakage inductance adjustment variable N is finally determined. 12 、N 22 , l 12 , l 13 result.

[0143] Example 3

[0144] The above-mentioned embodiment 1 provides a method for adjusting the design parameters of a hybrid winding transformer. Correspondingly, this embodiment provides a system for adjusting the design parameters of a hybrid winding transformer. The system provided in this embodiment can implement the method for adjusting the design parameters of the hybrid winding transformer of embodiment 1, and the system can be implemented by software, hardware, or a combination of software and hardware. For example, the system may include integrated or separate functional modules or functional units to execute the corresponding steps in each method of embodiment 1. Since the system of this embodiment is basically similar to the method embodiment, the process described in this embodiment is relatively simple, and the relevant parts can refer to the partial description of embodiment 1. The embodiment of the system provided in this embodiment is only illustrative.

[0145] The design parameter adjustment system of the hybrid winding transformer provided in this embodiment includes:

[0146] An adjustment variable determination module, used for determining a leakage inductance adjustment variable of the hybrid winding transformer based on design parameters thereof;

[0147] A leakage inductance adjustment space determination module is used to design the space according to the number of winding turns, analyze the leakage inductance adjustment range under different primary and secondary winding turn arrangements, and obtain the leakage inductance adjustment space;

[0148] A winding turns design point determination module is used to determine a leakage inductance adjustment range that includes the target leakage inductance value in the leakage inductance adjustment space according to the target leakage inductance value, and obtain a corresponding winding turns design point;

[0149] The design parameter determination module is used to determine the distances of each layer of winding from the upper and lower boundaries of the window according to the design point of the number of winding turns, and obtain the winding design parameters of the hybrid winding transformer.

[0150] Example 4

[0151] This embodiment provides a processing device corresponding to the design parameter adjustment method of the hybrid winding transformer provided in this embodiment 1. The processing device can be a processing device used for a client, such as a mobile phone, a laptop computer, a tablet computer, a desktop computer, etc., to execute the method of embodiment 1.

[0152] The processing device includes a processor, a memory, a communication interface and a bus, and the processor, the memory and the communication interface are connected through the bus to complete mutual communication. The memory stores a computer program that can be run on the processor, and the processor executes the design parameter adjustment method of the hybrid winding transformer provided in this embodiment 1 when running the computer program.

[0153] In some embodiments, the memory may be a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory.

[0154] In other embodiments, the processor may be a central processing unit (CPU), a digital signal processor (DSP), or other general-purpose processors of various types, which are not limited herein.

[0155] Example 5

[0156] The design parameter adjustment method of the hybrid winding transformer of this embodiment 1 can be specifically implemented as a computer program product, which may include a computer-readable storage medium carrying computer-readable program instructions for executing the design parameter adjustment method of the hybrid winding transformer described in this embodiment 1.

[0157] Computer readable storage media can be tangible devices that hold and store instructions used by instruction execution devices. Computer readable storage media can be, for example, but not limited to, electronic storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any combination thereof.

[0158] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0159] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0160] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0161] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for adjusting design parameters of a hybrid winding transformer, characterized in that The following steps are involved: Based on the design parameters of the hybrid winding transformer, the leakage inductance adjustment variable is determined; Determine the winding turns design space according to the leakage inductance adjustment variable, analyze the leakage inductance adjustment range under different primary and secondary winding turns arrangements, and obtain the leakage inductance adjustment space; According to the target leakage inductance value, a leakage inductance adjustment range in the leakage inductance adjustment space that includes the target leakage inductance value is determined to obtain a corresponding winding turns design point; According to the design point of the number of winding turns, the distance between each layer of winding and the upper and lower boundaries of the window is determined to obtain the winding design parameters of the hybrid winding transformer; The method of determining the leakage inductance adjustment variable based on the design parameters of the hybrid winding transformer includes: based on the design parameters of the hybrid winding transformer, taking the number of turns of each layer of primary winding, the number of turns of each layer of secondary winding, and the distance between each layer of winding and the upper boundary of the transformer core window as adjustment variables of the transformer leakage inductance value; taking the total number of turns of the primary and secondary windings during transformer design as a constraint condition, simplifying the determined adjustment variables; The method of determining the winding turns design space according to the leakage inductance adjustment variable, analyzing the leakage inductance adjustment range under different primary and secondary winding turns arrangements, and obtaining the leakage inductance adjustment space includes: obtaining the winding turns design space composed of the primary and secondary winding turns variables of each layer according to the total turns of the primary and secondary windings of the transformer; analyzing the leakage inductance adjustment range under different primary and secondary winding turns arrangements based on the winding turns design space; and mapping the winding turns design space composed of the primary and secondary winding turns variables of each layer to the leakage inductance adjustment space based on the leakage inductance adjustment range under different primary and secondary winding turns arrangements; The method analyzes the leakage inductance adjustment range under different primary and secondary winding turn arrangements based on the winding turn design space, including: for each winding turn design point in the winding turn design space, continuously adjusting the distances of each layer of windings from the upper and lower boundaries of the window to obtain multiple groups of design parameters; calculating the leakage inductance value corresponding to each group of design parameters; and determining the leakage inductance adjustment range corresponding to each winding turn design point based on the maximum and minimum values ​​of the obtained leakage inductance values.

2. The method for adjusting design parameters of a hybrid winding transformer according to claim 1, characterized in that: The calculation of the leakage inductance value corresponding to each set of design parameters includes: Based on the design parameters of the hybrid winding transformer, the three-dimensional magnetic field of the hybrid winding transformer is decomposed into several transverse magnetic fields and longitudinal magnetic fields inside and outside the window. Based on the transverse magnetic fields and longitudinal magnetic fields inside and outside the window, the three-dimensional total leakage magnetic energy of the hybrid winding transformer is calculated; According to the three-dimensional total leakage magnetic energy of the hybrid winding transformer, the leakage inductance calculation result of the hybrid winding transformer is calculated.

3. The method for adjusting design parameters of a hybrid winding transformer according to claim 2, characterized in that: Based on the design parameters of the hybrid winding transformer, the three-dimensional magnetic field of the hybrid winding transformer is decomposed into a number of transverse magnetic fields and longitudinal magnetic fields inside and outside the window, including: The dual 2D model is used to decompose the 3D magnetic field of the hybrid winding transformer into 2D magnetic fields with multiple layers of hybrid windings inside and outside the window. According to the superposition theorem, the two-dimensional magnetic field with multiple layers of hybrid windings inside and outside the window is decomposed into several two-dimensional magnetic fields with single layers of hybrid windings. Taking the window height direction and window width direction of the hybrid winding transformer as the longitudinal and transverse directions, according to the property of decoupling analysis of magnetic field energy, the two-dimensional magnetic field of each single-layer hybrid winding inside and outside the window is decomposed into several transverse magnetic fields and longitudinal magnetic fields.

4. The method for adjusting design parameters of a hybrid winding transformer according to claim 1, characterized in that: The step of determining a leakage inductance adjustment range that includes the target leakage inductance value in the leakage inductance adjustment space according to the target leakage inductance value, and obtaining a corresponding winding turns design point, comprises: According to the target leakage inductance value L σobj , determine the leakage inductance adjustment range that includes the target leakage inductance value in the leakage inductance adjustment space; Based on the determined leakage inductance adjustment range, determine the corresponding winding turns design point ( N 12 ,N 22 ) k .

5. A design parameter adjustment system for a hybrid winding transformer, characterized in that: include: An adjustment variable determination module, used for determining a leakage inductance adjustment variable of the hybrid winding transformer based on design parameters thereof; A leakage inductance adjustment space determination module is used to analyze the leakage inductance adjustment range under different primary and secondary winding turn arrangements according to the winding turn design space, and obtain the leakage inductance adjustment space; A winding turns design point determination module is used to determine a leakage inductance adjustment range that includes the target leakage inductance value in the leakage inductance adjustment space according to the target leakage inductance value, and obtain a corresponding winding turns design point; A design parameter determination module is used to determine the distances of each layer of winding from the upper and lower boundaries of the window according to the winding turns design point, and obtain the winding design parameters of the hybrid winding transformer; The method of determining the leakage inductance adjustment variable based on the design parameters of the hybrid winding transformer includes: based on the design parameters of the hybrid winding transformer, taking the number of turns of each layer of primary winding, the number of turns of each layer of secondary winding, and the distance between each layer of winding and the upper boundary of the transformer core window as adjustment variables of the transformer leakage inductance value; taking the total number of turns of the primary and secondary windings during transformer design as a constraint condition, simplifying the determined adjustment variables; Determine the winding turns design space according to the leakage inductance adjustment variable, analyze the leakage inductance adjustment range under different primary and secondary winding turns arrangements, and obtain the leakage inductance adjustment space, including: according to the total turns of the primary and secondary windings of the transformer, obtain the winding turns design space composed of the primary and secondary winding turns variables of each layer; based on the winding turns design space, analyze the leakage inductance adjustment range under different primary and secondary winding turns arrangements; based on the leakage inductance adjustment range under different primary and secondary winding turns arrangements, map the winding turns design space composed of the primary and secondary winding turns variables of each layer to the leakage inductance adjustment space; The method analyzes the leakage inductance adjustment range under different primary and secondary winding turn arrangements based on the winding turn design space, including: for each winding turn design point in the winding turn design space, continuously adjusting the distances of each layer of windings from the upper and lower boundaries of the window to obtain multiple groups of design parameters; calculating the leakage inductance value corresponding to each group of design parameters; and determining the leakage inductance adjustment range corresponding to each winding turn design point based on the maximum and minimum values ​​of the obtained leakage inductance values.

6. A computer-readable storage medium storing one or more programs, characterized in that: The one or more programs include instructions, which, when executed by a computing device, cause the computing device to perform any one of the methods of claims 1 to 4 .

7. A computing device, characterized in that include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include instructions for executing any one of the methods described in claims 1 to 4.

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