Method and device for determining equivalent circuit of single-phase common-mode inductor and electronic equipment

Abstract

The invention discloses a method and device for determining an equivalent circuit of a single-phase common mode inductor and electronic equipment. The method comprises the steps that an equivalent circuit structure of the single-phase common mode inductor is determined, the equivalent circuit structure comprises a first winding circuit and a second winding circuit which are connected in parallel, and each of the first winding circuit and the second winding circuit comprises two winding units which are connected in series; connecting the first winding or the second winding of the single-phase common-mode inductor to an impedance analyzer to obtain first test information, and respectively connecting one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor to the impedance analyzer to obtain second test information; determining the value of each component in the equivalent circuit structure according to the first test information and the second test information; an equivalent circuit of the single-phase common-mode inductor is formed by the equivalent circuit structure and the values of all the components. According to the invention, the problems of low accuracy and complex method for determining the equivalent circuit of the single-phase common-mode inductor in the prior art are solved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit simulation, and in particular to a method, device and electronic device for determining an equivalent circuit of a single-phase common-mode inductor. Background Art

[0002] Common-mode inductors, also called common-mode chokes, are a common EMI (Electromagnetic Interference) filtering component that is widely used in the AC / DC power input ports, output ports or signal ports of various electronic and electrical products, so that electronic and electrical products can meet the EMC (Electro Magnetic Compatibility) requirements of different countries or regions.

[0003] Figure 1 is a schematic diagram of a single-phase common-mode inductor in the related art, such as Figure 1 As shown in Figure 1, a single-phase common-mode inductor is usually composed of a magnetic core and two coupled windings with the same number of turns wound on the magnetic core. Since the complex permeability of the commonly used magnetic core changes with frequency, the winding impedance of the common-mode inductor changes with frequency. In addition, there is distributed capacitance in each winding of the common-mode inductor and between the two windings, so the winding impedance of the common-mode inductor is nonlinear.

[0004] In order to accurately simulate the frequency-varying impedance characteristics of common-mode inductors, a scheme for circuit modeling of common-mode inductors has emerged in related technologies. That is, using the core size, core complex permeability, winding wire diameter, winding distribution position, number of winding turns, etc. as input quantities, an equivalent circuit is established for the common-mode inductor through mathematical calculation methods.

[0005] However, the above-mentioned methods in the related art have many inputs and the calculation process is very cumbersome, and even need to consider the specific distribution position and winding angle of the winding. Moreover, for common-mode inductors with irregular windings or multi-layer windings, it is impossible to extract an accurate equivalent circuit through the mathematical calculation method in the related art.

[0006] With regard to the problems of low accuracy and complex methods for determining the equivalent circuit of single-phase common-mode inductance in the related art, no effective solution has been proposed so far. Summary of the invention

[0007] The present application provides a method, device and electronic device for determining an equivalent circuit of a single-phase common-mode inductor, so as to solve the problems of low accuracy and complex method in determining the equivalent circuit of a single-phase common-mode inductor in the related art.

[0008] According to one aspect of the present application, a method for determining an equivalent circuit of a single-phase common-mode inductor is provided. The single-phase common-mode inductor includes a magnetic core and a first winding and a second winding arranged on the magnetic core. The method includes: determining an equivalent circuit structure of the single-phase common-mode inductor, wherein the equivalent circuit structure includes a first winding circuit and a second winding circuit connected in parallel, the first winding circuit includes a first winding unit and a second winding unit connected in series, the second winding circuit includes a third winding unit and a fourth winding unit connected in series, each winding unit includes a resistor, a capacitor, and an inductor connected in parallel, a first inter-group capacitor is arranged between the first winding unit and the third winding unit, and a second inter-group capacitor is arranged between the second winding unit and the fourth winding unit; connecting the first winding or the second winding of the single-phase common-mode inductor to an impedance analyzer to obtain first test information output by the impedance analyzer, connecting one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor to the impedance analyzer respectively, and obtaining second test information output by the impedance analyzer; determining the value of each component in the equivalent circuit structure according to the first test information and the second test information; and forming an equivalent circuit of the single-phase common-mode inductor by the equivalent circuit structure and the value of each component.

[0009] Optionally, the first winding unit includes a first inductor L1, a first capacitor C1, and a first resistor R1, the second winding unit includes a second inductor L2, a second capacitor C2, and a second resistor R2, the third winding unit includes a third resistor R3, a third capacitor C3, and a third inductor L3, the fourth winding unit includes a fourth resistor R4, a fourth capacitor C4, and a fourth inductor L4, the first inter-group capacitor is C5, and the second inter-group capacitor is C6. Determining the values ​​of each component in the equivalent circuit structure according to the first test information and the second test information includes: extracting an inductance curve and a resistance curve from the first test information, and determining the value of each component in the equivalent circuit structure according to the inductance curve. The value of the first inductor L1 and the value of the third inductor L3 are determined, and the value of the first resistor R1, the value of the third resistor R3, the value of the second resistor R2 and the value of the fourth resistor R4 are determined through the resistance curve; the capacitance curve is extracted from the second test information, and the value of the first inter-group capacitance C5 and the value of the second inter-group capacitance C6 are determined through the capacitance curve, and the value of the first capacitance C1, the value of the second capacitance C2, the value of the third capacitance C3 and the value of the fourth capacitance C4 are determined according to the first resonant frequency f1 of the single-phase common mode inductor, and the value of the second inductor L2 and the value of the fourth inductor L4 are determined according to the second resonant frequency f2 of the single-phase common mode inductor.

[0010] Optionally, the abscissa of the inductance curve is the frequency value, and the ordinate of the inductance curve is the inductance value. Determining the value of the first inductance L1 and the value of the third inductance L3 through the inductance curve includes: determining a target inductance value interval from the inductance curve, wherein the target inductance value interval is an inductance value corresponding to a starting frequency in the inductance curve to a maximum inductance value in the inductance curve; and determining the value of the first inductance L1 and the value of the third inductance L3 according to any inductance value within the target inductance value interval.

[0011] Optionally, the abscissa of the resistance curve is the frequency value, the ordinate of the resistance curve is the resistance value, and determining the values ​​of the first resistor R1, the third resistor R3, the second resistor R2, and the fourth resistor R4 through the resistance curve includes: determining the resistance value corresponding to the first resonant frequency f1 from the resistance curve to obtain the first resistance value; determining the value of the first resistor R1 and the value of the third resistor R3 according to twice the first resistance value; determining the resistance value corresponding to the second resonant frequency f2 from the resistance curve to obtain the second resistance value; and determining the value of the second resistor R2 and the value of the fourth resistor R4 according to twice the second resistance value.

[0012] Optionally, the horizontal axis of the capacitance curve is the frequency value, and the vertical axis of the capacitance curve is the capacitance value. Determining the value of the first inter-group capacitance C5 and the value of the second inter-group capacitance C6 through the capacitance curve includes: determining a target capacitance value interval from the capacitance curve, wherein the target capacitance value interval is a smooth and stable value interval between the first resonant frequency f1 and the second resonant frequency f2 of the single-phase common mode inductor; determining the value of the first inter-group capacitance C5 and the value of the second inter-group capacitance C6 based on half of any capacitance value within the target capacitance value interval.

[0013] Optionally, determining the value of the first capacitor C1, the value of the second capacitor C2, the value of the third capacitor C3, and the value of the fourth capacitor C4 according to the first resonant frequency f1 of the single-phase common mode inductor includes: determining the target capacitance value C according to the first resonant frequency f1 and the value of the first inductor L1 and the following formula: According to the target capacitance value C, the values ​​of the first capacitor C1 , the second capacitor C2 , the third capacitor C3 and the fourth capacitor C4 are determined.

[0014] Optionally, determining the value of the second inductor L2 and the value of the fourth inductor L4 according to the second resonant frequency f2 of the single-phase common mode inductor includes: determining the target inductance value L according to the second resonant frequency f2, the value of the first capacitor C1, the value of the first inter-group capacitor C5, and the following formula: The value of the second inductor L2 and the value of the fourth inductor L4 are determined according to the target inductance value L.

[0015] According to another aspect of the present application, a device for determining an equivalent circuit of a single-phase common-mode inductor is provided. The device comprises: a first determining unit, used for determining an equivalent circuit structure of a single-phase common-mode inductor, wherein the equivalent circuit structure comprises a first winding circuit and a second winding circuit connected in parallel, the first winding circuit comprises a first winding unit and a second winding unit connected in series, the second winding circuit comprises a third winding unit and a fourth winding unit connected in series, each winding unit comprises a resistor, a capacitor, and an inductor connected in parallel, a first inter-group capacitor is arranged between the first winding unit and the third winding unit, and a second inter-group capacitor is arranged between the second winding unit and the fourth winding unit; an acquiring unit, used for connecting the first winding or the second winding of the single-phase common-mode inductor to an impedance analyzer, obtaining first test information output by the impedance analyzer, connecting one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor to the impedance analyzer respectively, and obtaining second test information output by the impedance analyzer; a second determining unit, used for determining the values ​​of each component in the equivalent circuit structure according to the first test information and the second test information; and a constructing unit, used for constructing an equivalent circuit of the single-phase common-mode inductor by the equivalent circuit structure and the values ​​of each component.

[0016] According to another aspect of an embodiment of the present invention, a computer storage medium is provided, which is used to store a program, wherein when the program is run, the device where the non-volatile storage medium is located is controlled to execute a method for determining an equivalent circuit of a single-phase common-mode inductor.

[0017] According to another aspect of an embodiment of the present invention, an electronic device is provided, comprising a processor and a memory; the memory stores computer-readable instructions, and the processor is used to execute the computer-readable instructions, wherein the computer-readable instructions execute a method for determining an equivalent circuit of a single-phase common-mode inductor when the instructions are executed.

[0018] Through the present application, the following steps are adopted: determining an equivalent circuit structure of a single-phase common-mode inductor, wherein the equivalent circuit structure includes a first winding circuit and a second winding circuit connected in parallel, the first winding circuit includes a first winding unit and a second winding unit connected in series, the second winding circuit includes a third winding unit and a fourth winding unit connected in series, each winding unit includes a resistor, a capacitor, and an inductor connected in parallel, a first inter-group capacitor is arranged between the first winding unit and the third winding unit, and a second inter-group capacitor is arranged between the second winding unit and the fourth winding unit; connecting the first winding or the second winding of the single-phase common-mode inductor to an impedance analyzer to obtain first test information output by the impedance analyzer, connecting one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor to the impedance analyzer respectively, and obtaining second test information output by the impedance analyzer; determining the values ​​of each component in the equivalent circuit structure according to the first test information and the second test information; forming an equivalent circuit of the single-phase common-mode inductor by the equivalent circuit structure and the values ​​of each component, thereby solving the problems of low accuracy and complex methods for determining the equivalent circuit of the single-phase common-mode inductor in the related art. By determining the equivalent circuit structure, the winding of the single-phase common-mode inductor is connected to the impedance analyzer, and the parameter values ​​of each component are determined by the test information output by the impedance analyzer, thereby achieving the effect of simply and accurately determining the equivalent circuit of the single-phase common-mode inductor. By connecting the equivalent circuit of the single-phase common-mode inductor of this embodiment to the circuit simulator, the impedance of the common-mode inductor in each frequency band can be accurately simulated, thereby accurately simulating the attenuation degree of the signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 is a schematic diagram of a single-phase common-mode inductor in the related art;

[0021] Figure 2 is a flow chart of a method for determining an equivalent circuit of a single-phase common-mode inductor provided in an embodiment of the present application;

[0022] Figure 3 The measurement diagram of the single-phase common mode inductance provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0023] Figure 4 The measurement diagram of the single-phase common mode inductance provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0024] Figure 5 is a schematic diagram of an equivalent circuit structure provided according to an embodiment of the present application;

[0025] Figure 6 is an inductance curve diagram provided according to an embodiment of the present application;

[0026] Figure 7 is a resistance curve diagram provided according to an embodiment of the present application;

[0027] Figure 8 is a capacitance curve diagram provided according to an embodiment of the present application;

[0028] Fig. 9 It is a schematic diagram comparing the amplitude of the winding impedance of the equivalent circuit of the single-phase common-mode inductor provided in the embodiment of the present application and the actually measured winding impedance;

[0029] Fig.10 is a schematic diagram of phase comparison between the winding impedance of the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application and the actually measured winding impedance;

[0030] Fig.11 is a schematic diagram of a device for determining an equivalent circuit of a single-phase common-mode inductor provided in an embodiment of the present application;

[0031] Fig.12 is a schematic diagram of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] It should be noted that the relevant information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for display, data for analysis, etc.) involved in this disclosure are all information and data authorized by the user or fully authorized by all parties.

[0036] According to an embodiment of the present application, a method for determining an equivalent circuit of a single-phase common-mode inductor is provided.

[0037] Figure 2 1 is a flow chart of a method for determining an equivalent circuit of a single-phase common-mode inductor according to an embodiment of the present application. The single-phase common-mode inductor includes a magnetic core and a first winding and a second winding arranged on the magnetic core, such as Figure 2 As shown, the method comprises the following steps:

[0038] Step S201, determining an equivalent circuit structure of a single-phase common-mode inductor, wherein the equivalent circuit structure includes a first winding circuit and a second winding circuit connected in parallel, the first winding circuit includes a first winding unit and a second winding unit connected in series, the second winding circuit includes a third winding unit and a fourth winding unit connected in series, each winding unit includes a resistor, a capacitor, and an inductor connected in parallel, a first inter-group capacitor is arranged between the first winding unit and the third winding unit, and a second inter-group capacitor is arranged between the second winding unit and the fourth winding unit.

[0039] Specifically, a single-phase common-mode inductor is usually composed of a magnetic core and two coupled windings with the same number of turns wound on the magnetic core, such as Figure 1 As shown, the winding between terminal 2 and terminal 4 is the first winding, and the winding between terminal 1 and terminal 3 is the second winding. In this embodiment, the first winding circuit and the second winding circuit connected in parallel are used to simulate the first winding and the second winding in the single-phase common-mode inductor, and the first inter-group capacitor and the second inter-group capacitor are used to simulate the parasitic capacitance between the first winding circuit and the second winding circuit. The first winding circuit and the second winding circuit are respectively provided with two winding units connected in series, so as to simulate the common mode characteristics and differential mode characteristics of the single-phase common-mode inductor. Each winding unit includes a resistor, a capacitor, and an inductor connected in parallel, wherein the capacitors in the first winding unit and the second winding unit are used to simulate the parasitic capacitance in the first winding, and the capacitors in the third winding unit and the fourth winding unit are used to simulate the parasitic capacitance in the second winding.

[0040] Step S202, connect the first winding or the second winding of the single-phase common-mode inductor to the impedance analyzer to obtain the first test information output by the impedance analyzer, and connect one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor to the impedance analyzer to obtain the second test information output by the impedance analyzer.

[0041] Specifically, the impedance of one winding of the single-phase common mode inductor may be measured, and the other winding is left suspended. Figure 3 The measurement diagram of the single-phase common mode inductance provided in the embodiment of the present application is shown in FIG. Figure 1 ,like Figure 3 As shown, the first terminal and the third terminal of the single-phase common-mode inductor can be connected to the impedance analyzer, that is, the second winding of the single-phase common-mode inductor is connected to the impedance analyzer to obtain the test information output by the impedance analyzer to obtain the first test information.

[0042] Since the first winding and the second winding of the single-phase common mode inductor are coupled windings with the same number of turns and are symmetrically wound on the magnetic ring, the second terminal and the fourth terminal of the single-phase common mode inductor can also be connected to the impedance analyzer, that is, the first winding of the single-phase common mode inductor is connected to the impedance analyzer to obtain the test information output by the impedance analyzer to obtain the first test information. At this time, the second winding is suspended.

[0043] Specifically, impedance measurement may be performed on the same-name ends of the two windings of the common-mode inductor. Figure 4 The measurement diagram of the single-phase common mode inductance provided in the embodiment of the present application is shown in FIG. Figure 2 ,like Figure 4 As shown, the terminals 1 and 2 of the single-phase common-mode inductor can be connected to the impedance analyzer, and the terminals 3 and 4 can be left hanging, and the test information output by the impedance analyzer can be obtained to obtain the second test information. In addition, it should be noted that because the purpose of this step is to obtain capacitance information, the impedance of the opposite-name ends of the two windings of the common-mode inductor can also be measured.

[0044] Since the first winding and the second winding of the single-phase common-mode inductor are coupled, the third terminal and the fourth terminal of the single-phase common-mode inductor can also be connected to the impedance analyzer, the first terminal and the second terminal are suspended, and the test information output by the impedance analyzer is obtained to obtain the second test information.

[0045] It should be noted that the order of obtaining the first test information and the second test information output by the impedance analyzer is not limited.

[0046] Step S203: determining the value of each component in the equivalent circuit structure according to the first test information and the second test information.

[0047] Specifically, the first test information and the second test information contain multiple impedance analysis curves, which can be analyzed and calculated to obtain the values ​​of inductance, resistance, capacitance in each winding unit in the first winding circuit and the second winding circuit, as well as the values ​​of the first group capacitance and the second group capacitance.

[0048] Step S204: construct an equivalent circuit of a single-phase common-mode inductor using the equivalent circuit structure and the values ​​of various components.

[0049] Specifically, the equivalent circuit of the single-phase common-mode inductor can be accurately extracted by using the measured values ​​of resistance, inductance and capacitance in combination with the equivalent circuit structure. By connecting the equivalent circuit of the single-phase common-mode inductor of this embodiment to the circuit simulator, the impedance of the common-mode inductor in each frequency band can be well simulated, thereby simulating the attenuation degree of the signal.

[0050] The method for determining an equivalent circuit of a single-phase common-mode inductor provided in an embodiment of the present application determines an equivalent circuit structure of the single-phase common-mode inductor, wherein the equivalent circuit structure includes a first winding circuit and a second winding circuit connected in parallel, the first winding circuit includes a first winding unit and a second winding unit connected in series, the second winding circuit includes a third winding unit and a fourth winding unit connected in series, each winding unit includes a resistor, a capacitor, and an inductor connected in parallel, a first inter-group capacitor is provided between the first winding unit and the third winding unit, and a second inter-group capacitor is provided between the second winding unit and the fourth winding unit; The first winding or the second winding of the single-phase common-mode inductor is connected to an impedance analyzer to obtain the first test information output by the impedance analyzer, and one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor are respectively connected to the impedance analyzer to obtain the second test information output by the impedance analyzer; the values ​​of each component in the equivalent circuit structure are determined according to the first test information and the second test information; the equivalent circuit structure and the values ​​of each component constitute the equivalent circuit of the single-phase common-mode inductor, which solves the problem of low accuracy and complex methods for determining the equivalent circuit of the single-phase common-mode inductor in the related art. By determining the equivalent circuit structure, the winding of the single-phase common-mode inductor is connected to the impedance analyzer, and the parameter values ​​of each component are determined by the test information output by the impedance analyzer, thereby achieving the effect of simply and accurately determining the equivalent circuit of the single-phase common-mode inductor.

[0051] Figure 5 is a schematic diagram of an equivalent circuit structure provided according to an embodiment of the present application, such as Figure 5 As shown, the first winding unit includes a first inductor L1, a first capacitor C1, and a first resistor R1; the second winding unit includes a second inductor L2, a second capacitor C2, and a second resistor R2; the third winding unit includes a third resistor R3, a third capacitor C3, and a third inductor L3; the fourth winding unit includes a fourth resistor R4, a fourth capacitor C4, and a fourth inductor L4; the first inter-group capacitor is C5, and the second inter-group capacitor is C6.

[0052] Among them, L1 and L3 are mutually coupled inductors, L1 can be set to L3, the coupling coefficient is 1, L2 and L4 are mutually coupled inductors, L2 can be set to L4, the coupling coefficient is -1, C1, C2, C3, C4 are parasitic capacitances in the windings, C1 can be set to C2 = C3 = C4, the parasitic capacitance between the windings C5 = C6 can be set, the resistance value of the first resonant frequency is represented by R1 or R3, R1 can be set to R3, the resistance value of the second resonant frequency is represented by R2 or R4, R2 can be set to R4.

[0053] It should be noted that the equivalent circuit structure of the single-phase common-mode inductor of this embodiment includes four winding units, which can characterize the characteristics of the two resonance points of the single-phase common-mode inductor, wherein the two coupled winding units R3, C3, L3 and L1, C1, R1 characterize the characteristics of the first resonance point of the single-phase common-mode inductor, that is, the common mode characteristic, and the two coupled winding units R4, C4, L4 and L2, C2, R2 characterize the characteristics of the second resonance point of the single-phase common-mode inductor, that is, the differential mode characteristic.

[0054] In the method for determining the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application, determining the values ​​of each component in the equivalent circuit structure according to the first test information and the second test information includes: extracting the inductance curve and the resistance curve from the first test information, determining the value of the first inductor L1 and the value of the third inductor L3 through the inductance curve, and determining the value of the first resistor R1, the value of the third resistor R3, the value of the second resistor R2, and the value of the fourth resistor R4 through the resistance curve; extracting the capacitance curve from the second test information, determining the value of the first inter-group capacitance C5 and the value of the second inter-group capacitance C6 through the capacitance curve, determining the value of the first capacitor C1, the value of the second capacitor C2, the value of the third capacitor C3, and the value of the fourth capacitor C4 according to the first resonant frequency f1 of the single-phase common-mode inductor, and determining the value of the second inductor L2 and the value of the fourth inductor L4 according to the second resonant frequency f2 of the single-phase common-mode inductor.

[0055] That is, this embodiment uses an impedance analyzer to measure the single-phase common-mode inductor twice to obtain the parameter values ​​of the circuit components of the equivalent circuit structure, and can simulate the impedance characteristics of the single-phase common-mode inductor in the frequency band of 100kHz to 30MHz.

[0056] Optionally, in the method for determining the equivalent circuit of a single-phase common-mode inductor provided in an embodiment of the present application, the horizontal coordinate of the inductance curve is the frequency value, the vertical coordinate of the inductance curve is the inductance value, and determining the value of the first inductance L1 and the value of the third inductance L3 through the inductance curve includes: determining a target inductance value interval from the inductance curve, wherein the target inductance value interval is the inductance value corresponding to the starting frequency in the inductance curve to the maximum inductance value in the inductance curve; and determining the value of the first inductance L1 and the value of the third inductance L3 according to any inductance value within the target inductance value interval.

[0057] Figure 6 is an inductance curve diagram provided according to an embodiment of the present application, where the inductance curve is recorded as Ls curve. Figure 6 As shown, the inductance values ​​within the target inductance value range are not much different. In the measured Ls curve, the Ls value of the starting frequency can be selected to determine the value of the first inductor L1 and the value of the third inductor L3, or the maximum Ls value can be selected to determine the value of the first inductor L1 and the value of the third inductor L3, or any inductance value between the starting frequency Ls value and the maximum Ls value can be selected to determine the value of the first inductor L1 and the value of the third inductor L3. Since the single-phase common mode inductor includes two coupled windings with the same number of turns, in order to improve the accuracy of the simulation, the value of the mutually coupled first inductor L1 and the value of the third inductor L3 can be set to the same value. For example, the inductance value corresponding to the starting frequency of 100kHz is 3.13mH, then L1=L3=3.13mH.

[0058] Optionally, in the method for determining the equivalent circuit of a single-phase common-mode inductor provided in an embodiment of the present application, the horizontal axis of the resistance curve is the frequency value, the vertical axis of the resistance curve is the resistance value, and determining the value of the first resistor R1, the value of the third resistor R3, the value of the second resistor R2, and the value of the fourth resistor R4 through the resistance curve includes: determining the resistance value corresponding to the first resonant frequency f1 from the resistance curve to obtain the first resistance value; determining the value of the first resistor R1 and the value of the third resistor R3 according to twice the first resistance value; determining the resistance value corresponding to the second resonant frequency f2 from the resistance curve to obtain the second resistance value; and determining the value of the second resistor R2 and the value of the fourth resistor R4 according to twice the second resistance value.

[0059] Figure 7 It is a resistance curve diagram provided according to an embodiment of the present application. The resistance curve is recorded as an Rs curve. The Rs value of the first resonant frequency f1 in the measured Rs curve is multiplied by 2, and the values ​​of R1 and R3 are determined according to the calculated values. The Rs value of the second resonant frequency f2 is multiplied by 2, and the values ​​of R2 and R4 are determined according to the calculated values.

[0060] Since the single-phase common-mode inductor includes two coupled windings with the same number of turns, the resistance values ​​R1 and R3 corresponding to the first resonant frequency can be set to the same value, and the resistance values ​​R2 and R4 corresponding to the second resonant frequency can be set to the same value. For example, if the first resonant frequency f1=404.48kHz, Rs=7.19kΩ, then R1=R3=14.38kΩ, and if the second resonant frequency f2=16.02MHz, Rs=2.00kΩ, then R2=R4=4.00kΩ.

[0061] Optionally, in the method for determining the equivalent circuit of a single-phase common-mode inductor provided in an embodiment of the present application, the horizontal axis of the capacitance curve is the frequency value, the vertical axis of the capacitance curve is the capacitance value, and determining the value of the first inter-group capacitance C5 and the value of the second inter-group capacitance C6 through the capacitance curve includes: determining a target capacitance value interval from the capacitance curve, wherein the target capacitance value interval is a smooth and stable value interval between the first resonant frequency f1 and the second resonant frequency f2 of the single-phase common-mode inductor; determining the value of the first inter-group capacitance C5 and the value of the second inter-group capacitance C6 based on half of any capacitance value within the target capacitance value interval.

[0062] Figure 8 It is a capacitance curve diagram provided according to the embodiment of the present application. The capacitance curve is recorded as Cp curve. In this embodiment, terminals 1 and 3 are connected to an impedance analyzer. In the measured Cp curve, the smooth and stable value of Cp is selected and divided by 2 to determine the values ​​of C5 and C6. Since the single-phase common-mode inductor includes two coupled windings with the same number of turns, for the convenience of simulation, the values ​​of component capacitors C5 and C6 can be set to the same value. For example, if Cp=14.42pF, then C5=C6=7.21pF.

[0063] Optionally, in the method for determining the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application, determining the value of the first capacitor C1, the value of the second capacitor C2, the value of the third capacitor C3, and the value of the fourth capacitor C4 according to the first resonant frequency f1 of the single-phase common-mode inductor includes: determining the target capacitance value C according to the first resonant frequency f1 and the value of the first inductor L1 and the following formula: According to the target capacitance value C, the values ​​of the first capacitor C1 , the second capacitor C2 , the third capacitor C3 and the fourth capacitor C4 are determined.

[0064] For example, if f1 = 404.48kHz, L1 = 3.13mH, substitute f1 = 404.48kHz and L1 = 3.13mH into the formula C is obtained. Since the single-phase common-mode inductor includes two coupled windings with the same number of turns, in order to improve the accuracy of the simulation, the parasitic capacitances C1, C2, C3, and C4 in the windings can be set to the same value, C1=C2=C3=C4=24.7pF.

[0065] Optionally, in the method for determining the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application, determining the value of the second inductor L2 and the value of the fourth inductor L4 according to the second resonant frequency f2 of the single-phase common-mode inductor includes: determining the target inductance value L according to the second resonant frequency f2 and the value of the first capacitor C1, the value of the first inter-group capacitor C5 and the following formula: The value of the second inductor L2 and the value of the fourth inductor L4 are determined according to the target inductance value L.

[0066] Since the single-phase common-mode inductor includes two coupled windings with the same number of turns, L2 and L4 are mutually coupled inductors. In order to improve the accuracy of the simulation, L2 = L4 can be set. For example, if f2 = 16.02MHz, C1 = 24.7pF, C5 = 7.21pF, substitute f2 = 16.02MHz and C1 = 24.7pF, C5 = 7.21pF into the formula It is found that L2=L4=1.55uH.

[0067] Fig. 9 It is a schematic diagram comparing the amplitude of the winding impedance of the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application and the actually measured winding impedance, wherein the dotted line is the winding impedance curve of the equivalent circuit, and the solid line is the actually measured winding impedance curve. Through analysis, it can be seen that the amplitude error between the winding impedance of the equivalent circuit of this embodiment and the actually measured winding impedance is small, and the consistency is high.

[0068] Fig.10 It is a schematic diagram of the phase comparison between the winding impedance of the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application and the actually measured winding impedance, wherein the dotted line is the winding impedance curve of the equivalent circuit, and the solid line is the actually measured winding impedance curve. Through analysis, it can be seen that the impedance phase of the equivalent circuit of this embodiment is very consistent with the measured impedance phase.

[0069] In this embodiment, the common-mode inductor is equivalent to four winding units, wherein the mutually coupled inductors L1 and L3 can be set to be equal, the mutually coupled inductors L2 and L4 can be set to be equal, the parasitic capacitances C1, C2, C3, and C4 in the winding can be set to be equal, the parasitic capacitances C5 and C6 between the windings can be set to be equal, the resistances R1 and R3 at the first resonant frequency can be set to be equal, and the resistances R2 and R4 at the second resonant frequency can be set to be equal. By measuring the single-phase common-mode inductor twice with an impedance analyzer, the circuit parameters of the equivalent circuit structure can be obtained simply and accurately, so that the impedance characteristics of the single-phase common-mode inductor in the 100kHz-30MHz frequency band can be accurately simulated. Compared with the numerical calculation method in the related art, the method of this embodiment realizes the fast, simple, and accurate extraction of the single-phase common-mode inductor equivalent circuit, and the equivalent circuit of the single-phase common-mode inductor of this embodiment is connected to the circuit simulator, and on the basis of accurately simulating the impedance of the common-mode inductor in each frequency band, the attenuation degree of the signal can be accurately simulated.

[0070] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0071] The embodiment of the present application also provides a device for determining an equivalent circuit of a single-phase common-mode inductor. It should be noted that the device for determining an equivalent circuit of a single-phase common-mode inductor of the embodiment of the present application can be used to execute the method for determining an equivalent circuit of a single-phase common-mode inductor provided in the embodiment of the present application. The device for determining an equivalent circuit of a single-phase common-mode inductor provided in the embodiment of the present application is introduced below.

[0072] Fig.11 Schematic diagram of a device for determining an equivalent circuit of a single-phase common-mode inductor according to an embodiment of the present application. Fig.11 As shown, the device comprises:

[0073] The first determination unit 111 is used to determine the equivalent circuit structure of the single-phase common-mode inductor, wherein the equivalent circuit structure includes a first winding circuit and a second winding circuit in parallel, the first winding circuit includes a first winding unit and a second winding unit in series, the second winding circuit includes a third winding unit and a fourth winding unit in series, each winding unit includes a resistor, a capacitor, and an inductor connected in parallel, a first inter-group capacitor is arranged between the first winding unit and the third winding unit, and a second inter-group capacitor is arranged between the second winding unit and the fourth winding unit.

[0074] The acquisition unit 112 is used to connect the first winding or the second winding of the single-phase common-mode inductor to the impedance analyzer to obtain the first test information output by the impedance analyzer, and connect one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor to the impedance analyzer respectively to obtain the second test information output by the impedance analyzer.

[0075] The second determining unit 113 is used to determine the value of each component in the equivalent circuit structure according to the first test information and the second test information.

[0076] The construction unit 114 is used to construct an equivalent circuit of the single-phase common mode inductor by using the equivalent circuit structure and the values ​​of various components.

[0077] The device for determining the equivalent circuit of a single-phase common-mode inductor provided in an embodiment of the present application determines the equivalent circuit structure of the single-phase common-mode inductor through a first determining unit 111, wherein the equivalent circuit structure includes a first winding circuit and a second winding circuit connected in parallel, the first winding circuit includes a first winding unit and a second winding unit connected in series, the second winding circuit includes a third winding unit and a fourth winding unit connected in series, each winding unit includes a resistor, a capacitor, and an inductor connected in parallel, a first inter-group capacitor is provided between the first winding unit and the third winding unit, and a second inter-group capacitor is provided between the second winding unit and the fourth winding unit; an acquiring unit 112 connects the first winding or the second winding of the single-phase common-mode inductor to an impedance analyzer to acquire first test information output by the impedance analyzer , connect one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor to the impedance analyzer respectively, and obtain the second test information output by the impedance analyzer; the second determining unit 113 determines the values ​​of each component in the equivalent circuit structure according to the first test information and the second test information; the constructing unit 114 constructs the equivalent circuit of the single-phase common-mode inductor by the equivalent circuit structure and the values ​​of each component, which solves the problems of low accuracy and complex methods for determining the equivalent circuit of the single-phase common-mode inductor in the related art. By determining the equivalent circuit structure, the winding of the single-phase common-mode inductor is connected to the impedance analyzer, and the parameter values ​​of each component are determined by the test information output by the impedance analyzer, thereby achieving the effect of simply and accurately determining the equivalent circuit of the single-phase common-mode inductor.

[0078] Optionally, in the device for determining the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application, the first winding unit includes a first inductor L1, a first capacitor C1, and a first resistor R1, the second winding unit includes a second inductor L2, a second capacitor C2, and a second resistor R2, the third winding unit includes a third resistor R3, a third capacitor C3, and a third inductor L3, the fourth winding unit includes a fourth resistor R4, a fourth capacitor C4, and a fourth inductor L4, the first inter-group capacitor is C5, and the second inter-group capacitor is C6, and the second determination unit 113 includes: a first determination module, which is used to extract an inductance curve and a resistance curve from the first test information, and to determine the inductance curve by the inductance curve a first determining module, for extracting a capacitance curve from the second test information, determining a value of a first inter-group capacitance C5 and a value of a second inter-group capacitance C6 through the capacitance curve, determining a value of the first capacitance C1, a value of the second capacitance C2, a value of the third capacitance C3 and a value of the fourth capacitance C4 according to a first resonant frequency f1 of the single-phase common mode inductor, and determining a value of the second inductor L2 and a value of the fourth inductor L4 according to a second resonant frequency f2 of the single-phase common mode inductor.

[0079] Optionally, in the device for determining the equivalent circuit of a single-phase common-mode inductor provided in an embodiment of the present application, the horizontal coordinate of the inductance curve is the frequency value, and the vertical coordinate of the inductance curve is the inductance value. The first determination module is used to: determine a target inductance value range from the inductance curve, wherein the target inductance value range is the inductance value corresponding to the starting frequency in the inductance curve to the maximum inductance value in the inductance curve; and determine the value of the first inductance L1 and the value of the third inductance L3 according to any inductance value within the target inductance value range.

[0080] Optionally, in the device for determining the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application, the horizontal axis of the resistance curve is the frequency value, the vertical axis of the resistance curve is the resistance value, and the first determination module is also used to: determine the resistance value corresponding to the first resonant frequency f1 from the resistance curve to obtain the first resistance value; determine the value of the first resistor R1 and the value of the third resistor R3 according to twice the first resistance value; determine the resistance value corresponding to the second resonant frequency f2 from the resistance curve to obtain the second resistance value; determine the value of the second resistor R2 and the value of the fourth resistor R4 according to twice the second resistance value.

[0081] Optionally, in the device for determining the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application, the horizontal axis of the capacitance curve is the frequency value, the vertical axis of the capacitance curve is the capacitance value, and the second determination module is used to: determine a target capacitance value interval from the capacitance curve, wherein the target capacitance value interval is a smooth and stable value interval between the first resonant frequency f1 and the second resonant frequency f2 of the single-phase common-mode inductor; determine the value of the first inter-group capacitance C5 and the value of the second inter-group capacitance C6 based on half of any capacitance value within the target capacitance value interval.

[0082] Optionally, in the device for determining the equivalent circuit of the single-phase common-mode inductor provided in the embodiment of the present application, the second determination module is further used to: determine the target capacitance value C according to the first resonant frequency f1 and the value of the first inductor L1 and the following formula: According to the target capacitance value C, the values ​​of the first capacitor C1 , the second capacitor C2 , the third capacitor C3 and the fourth capacitor C4 are determined.

[0083] Optionally, in the device for determining the equivalent circuit of the single-phase common-mode inductor provided in an embodiment of the present application, the second determination module is further used to: determine the target inductance value L according to the second resonant frequency f2 and the value of the first capacitor C1, the value of the first inter-group capacitor C5 and the following formula: The value of the second inductor L2 and the value of the fourth inductor L4 are determined according to the target inductance value L.

[0084] The device for determining the equivalent circuit of the above-mentioned single-phase common-mode inductor includes a processor and a memory. The above-mentioned first determination unit 111, acquisition unit 112, second determination unit 113 and construction unit 114 are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0085] The processor includes a core, and the core retrieves the corresponding program unit from the memory. One or more cores can be set, and the problem of low accuracy and complex method of determining the equivalent circuit of the single-phase common mode inductor in the related art is solved by adjusting the core parameters.

[0086] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0087] An embodiment of the present application further provides a computer storage medium, which is used to store a program, wherein when the program is run, the device where the non-volatile storage medium is located is controlled to execute a method for determining an equivalent circuit of a single-phase common-mode inductor.

[0088] The embodiment of the present application also provides an electronic device, Fig.12 1 is a schematic diagram of an electronic device provided according to an embodiment of the present application, wherein the electronic device 120 includes a processor and a memory; the memory stores computer-readable instructions, and the processor is used to run the computer-readable instructions, wherein the computer-readable instructions execute a method for determining an equivalent circuit of a single-phase common-mode inductor when the instructions are run. The electronic device in this article may be a server, a PC, a PAD, a mobile phone, etc.

[0089] 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.

[0090] 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.

[0091] 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 comprising 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.

[0092] 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. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0093] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0094] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0095] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0096] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0097] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for determining an equivalent circuit of a single-phase common-mode inductor, characterized in that: The single-phase common mode inductor comprises a magnetic core and a first winding and a second winding arranged on the magnetic core. The method comprises: Determine an equivalent circuit structure of the single-phase common-mode inductor, wherein the equivalent circuit structure includes a first winding circuit and a second winding circuit connected in parallel, the first winding circuit includes a first winding unit and a second winding unit connected in series, the second winding circuit includes a third winding unit and a fourth winding unit connected in series, each winding unit includes a resistor, a capacitor, and an inductor connected in parallel, a first inter-group capacitor is provided between the first winding unit and the third winding unit, and a second inter-group capacitor is provided between the second winding unit and the fourth winding unit; Connecting the first winding or the second winding of the single-phase common-mode inductor to an impedance analyzer to obtain first test information output by the impedance analyzer, and connecting one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor to the impedance analyzer to obtain second test information output by the impedance analyzer; Determine the value of each component in the equivalent circuit structure according to the first test information and the second test information; The equivalent circuit structure and the values ​​of the various components constitute the equivalent circuit of the single-phase common mode inductor.

2. The method according to claim 1, characterized in that The first winding unit includes a first inductor L1, a first capacitor C1, and a first resistor R1, the second winding unit includes a second inductor L2, a second capacitor C2, and a second resistor R2, the third winding unit includes a third resistor R3, a third capacitor C3, and a third inductor L3, the fourth winding unit includes a fourth resistor R4, a fourth capacitor C4, and a fourth inductor L4, the first inter-group capacitor is C5, and the second inter-group capacitor is C6, and the values ​​of the components in the equivalent circuit structure are determined according to the first test information and the second test information. The following comprises: Extracting an inductance curve and a resistance curve from the first test information, determining the value of the first inductance L1 and the value of the third inductance L3 according to the inductance curve, and determining the value of the first resistor R1, the value of the third resistor R3, the value of the second resistor R2, and the value of the fourth resistor R4 according to the resistance curve; A capacitance curve is extracted from the second test information, and a value of the first inter-group capacitance C5 and a value of the second inter-group capacitance C6 are determined through the capacitance curve. The value of the first capacitance C1, the value of the second capacitance C2, the value of the third capacitance C3, and the value of the fourth capacitance C4 are determined according to the first resonant frequency f1 of the single-phase common-mode inductor, and the value of the second inductor L2 and the value of the fourth inductor L4 are determined according to the second resonant frequency f2 of the single-phase common-mode inductor.

3. The method according to claim 2, characterized in that The abscissa of the inductance curve is the frequency value, the ordinate of the inductance curve is the inductance value, and determining the value of the first inductance L1 and the value of the third inductance L3 by using the inductance curve includes: Determining a target inductance value interval from the inductance curve, wherein the target inductance value interval is an inductance value corresponding to a starting frequency in the inductance curve to a maximum inductance value in the inductance curve; The value of the first inductor L1 and the value of the third inductor L3 are determined according to any inductance value within the target inductance value interval.

4. The method according to claim 2, characterized in that: The abscissa of the resistance curve is the frequency value, the ordinate of the resistance curve is the resistance value, and determining the value of the first resistor R1, the value of the third resistor R3, the value of the second resistor R2, and the value of the fourth resistor R4 through the resistance curve includes: Determine the resistance value corresponding to the first resonant frequency f1 from the resistance curve to obtain a first resistance value; Determine the value of the first resistor R1 and the value of the third resistor R3 according to twice the value of the first resistor; Determine the resistance value corresponding to the second resonant frequency f2 from the resistance curve to obtain a second resistance value; The value of the second resistor R2 and the value of the fourth resistor R4 are determined according to twice the value of the second resistor.

5. The method according to claim 2, characterized in that: The abscissa of the capacitance curve is the frequency value, the ordinate of the capacitance curve is the capacitance value, and determining the value of the first inter-group capacitance C5 and the value of the second inter-group capacitance C6 through the capacitance curve includes: Determine a target capacitance value interval from the capacitance curve, wherein the target capacitance value interval is a smooth and stable value interval between a first resonant frequency f1 and a second resonant frequency f2 of the single-phase common mode inductor; The value of the first inter-group capacitance C5 and the value of the second inter-group capacitance C6 are determined according to half of any capacitance value within the target capacitance value interval.

6. The method according to claim 2, characterized in that Determining the value of the first capacitor C1, the value of the second capacitor C2, the value of the third capacitor C3, and the value of the fourth capacitor C4 according to the first resonant frequency f1 of the single-phase common mode inductor includes: The target capacitance value C is determined according to the first resonant frequency f1, the value of the first inductor L1 and the following formula: According to the target capacitance value C, the value of the first capacitor C1 , the value of the second capacitor C2 , the value of the third capacitor C3 , and the value of the fourth capacitor C4 are determined.

7. The method according to claim 2, characterized in that Determining the value of the second inductor L2 and the value of the fourth inductor L4 according to the second resonant frequency f2 of the single-phase common mode inductor includes: The target inductance value L is determined according to the second resonant frequency f2, the value of the first capacitor C1, the value of the first inter-group capacitor C5, and the following formula: The value of the second inductor L2 and the value of the fourth inductor L4 are determined according to the target inductance value L.

8. A device for determining an equivalent circuit of a single-phase common-mode inductor, characterized in that: The single-phase common mode inductor comprises a magnetic core and a first winding and a second winding arranged on the magnetic core, including: a first determining unit, configured to determine an equivalent circuit structure of the single-phase common-mode inductor, wherein the equivalent circuit structure comprises a first winding circuit and a second winding circuit connected in parallel, the first winding circuit comprises a first winding unit and a second winding unit connected in series, the second winding circuit comprises a third winding unit and a fourth winding unit connected in series, each winding unit comprises a resistor, a capacitor, and an inductor connected in parallel, a first inter-group capacitor is provided between the first winding unit and the third winding unit, and a second inter-group capacitor is provided between the second winding unit and the fourth winding unit; an acquisition unit, configured to connect the first winding or the second winding of the single-phase common-mode inductor to an impedance analyzer to acquire first test information output by the impedance analyzer, and respectively connect one terminal of the first winding and one terminal of the second winding of the single-phase common-mode inductor to the impedance analyzer to acquire second test information output by the impedance analyzer; A second determining unit, configured to determine the value of each component in the equivalent circuit structure according to the first test information and the second test information; A construction unit is used to construct an equivalent circuit of the single-phase common-mode inductor by using the equivalent circuit structure and the values ​​of the various components.

9. A computer storage medium, characterized in that The computer storage medium is used to store a program, wherein when the program is executed, the device where the computer storage medium is located is controlled to execute the method for determining the equivalent circuit of a single-phase common-mode inductor according to any one of claims 1 to 7.

10. An electronic device comprising a memory and a processor, characterized in that: The memory stores a computer program, and the processor is configured to execute the method for determining an equivalent circuit of a single-phase common-mode inductor according to any one of claims 1 to 7 through the computer program.

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