A method, medium and device for winding control of a high-frequency low-loss common-mode inductor

Abstract

This application discloses a winding control method, winding control device, and computer-readable storage medium for common-mode inductors. The method includes: acquiring preset window path information for a first winding and a second winding within the same winding window of the magnetic core; identifying parallel winding sections based on the preset window path information; when switching from a non-parallel winding section to a parallel winding section, keeping the entry and exit window positions of the first winding unchanged, and switching one of the entry and exit window positions of the second winding so that the window path of the second winding within the parallel winding section is offset relative to the first winding along the circumferential direction of the magnetic core; and restoring the original window path of the second winding when exiting the parallel winding section. Thus, while maintaining the overall stability of the winding process, the projected overlap length of adjacent conductor segments of the two windings within a local section can be reduced.

Description

Technical Field

[0001] This application relates to the field of inductor winding control technology, and in particular to a winding control method, medium and device for a high-frequency, low-loss common-mode inductor. Background Technology

[0002] Existing common-mode inductors typically consist of a magnetic core and multiple windings wound within a winding window of the core. In high-frequency applications, the arrangement of these windings affects the coupling state and parasitic parameters between them, thus impacting the high-frequency performance and loss characteristics of the inductor. Particularly when two windings are wound within the same winding window, if they pass side-by-side continuously along the winding direction in a local path, a large overlap of conductor segments can easily form within that local area.

[0003] Existing winding equipment typically completes winding according to a preset path, focusing more on winding formation, wire arrangement stability, and production efficiency. It lacks targeted path adjustment and control methods for overlapping relationships between different windings within the same winding window in localized parallel sections. Therefore, in automated winding processes, it is difficult to selectively adjust sections with significant local overlap without significantly altering the overall winding path, thus hindering the reduction of overlap between the conductor segments of the two windings within these sections. Therefore, a winding control method for common-mode inductors is needed. Summary of the Invention

[0004] To address the problem in the prior art that it is difficult to specifically adjust the overlapping relationship of two windings in local continuous side-by-side sections within the same winding window during the automated winding process of common mode inductors, this application provides a winding control method for common mode inductors, a computer-readable storage medium, and a winding control device for common mode inductors.

[0005] This application provides a winding control method for a high-frequency, low-loss common-mode inductor, applied to a winding device for a common-mode inductor. The common-mode inductor includes a magnetic core and a first winding and a second winding wound within the same winding window of the magnetic core. The method is characterized by the following steps: S10. Obtain the preset window path information of the first winding and the second winding within the winding window; S20. Identify parallel winding sections based on the preset window path information; S30. When switching from a non-parallel winding section to the parallel winding section, keep the entry and exit positions of the first winding unchanged, and switch one of the entry and exit positions of the second winding so that the window path of the second winding in the parallel winding section is offset relative to the first winding along the circumferential direction of the magnetic core, thereby reducing the projected overlap length of the adjacent conductor segments of the two windings. S40. When switching from the parallel winding section to a non-parallel winding section, restore the original window path before the second winding switching; S50. Control the winding device to complete the winding of the first winding and the second winding, and combine them with the magnetic core to form the common mode inductor.

[0006] More preferably, the parallel winding section is a winding interval in which the first winding and the second winding pass through the same winding window continuously side by side along the winding direction, and on a cross section perpendicular to the winding direction, the projected overlap length of the wire segments of the two adjacent to each other along the circumference of the magnetic core is greater than or equal to a preset length threshold L0.

[0007] More preferably, within the parallel winding section, the entry and exit positions of the first winding are kept unchanged, and only one of the entry and exit positions of the second winding is switched.

[0008] More preferably, the switching of the first item is achieved by switching the second winding from the currently corresponding first guide slot to the second guide slot, thereby changing the window path of the second winding within the same winding window.

[0009] More preferably, the second guide slot is offset relative to the first guide slot along the circumferential direction of the winding window, so that the window path formed by the second guide slot is offset relative to the window path formed by the first guide slot along the circumferential direction of the magnetic core.

[0010] More preferably, when the switching of a term is achieved by switching guide slots, the number of guide slots corresponding to the term is determined by the smallest non-negative integer N that satisfies the following formula: LN×D <L1; Where L is the projected overlap length in the parallel winding section before switching, D is the reduction in projected overlap length caused by switching a guide slot corresponding to the item, and L1 is the target projected overlap length threshold after switching.

[0011] More preferably, on the section to be determined perpendicular to the winding direction, the projection interval of adjacent wire segments belonging to the first winding along the circumference of the magnetic core is defined as [X1, Y1], and the projection interval of adjacent wire segments belonging to the second winding along the circumference of the magnetic core is defined as [X2, Y2]. Then the projection overlap length L satisfies: L=max(0,min(Y1,Y2)-max(X1,X2)); Among them, X1 <Y1,X2<Y2。

[0012] More preferably, let A be the circumferential pitch angle corresponding to two adjacent guide slots, and let B be the circumferential offset angle corresponding to the aforementioned term, satisfying: B = N × A; The second winding is controlled to switch N guide slots along the circumferential direction of the winding window according to the circumferential offset angle B, so that the switched window path is offset from the original window path along the circumferential direction of the magnetic core.

[0013] A computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the winding control method for a high-frequency, low-loss common-mode inductor.

[0014] A common-mode inductor winding control device includes a memory and a processor. The memory stores a computer program, which, when executed by the processor, causes the processor to perform the high-frequency, low-loss common-mode inductor winding control method.

[0015] Compared with the prior art, this application has at least the following beneficial effects.

[0016] This application obtains preset window path information for the first and second windings within the winding window, and identifies parallel winding sections based on this preset window path information. When switching from a non-parallel winding section to a parallel winding section, the entry and exit positions of the first winding remain unchanged, while only one position of the second winding is switched. This causes the window path of the second winding within the parallel winding section to be offset relative to the first winding along the circumferential direction of the magnetic core. Upon leaving the parallel winding section, the original window path before the switch is restored. Therefore, without changing the overall winding path, path adjustment can be implemented only for sections with significant local overlap, thereby reducing the projected overlap length of adjacent conductor segments of the two windings within that local section.

[0017] Furthermore, this application does not continuously change the window path of the second winding throughout the entire winding process. Instead, it only performs position switching within the identified parallel winding section and restores the original window path after exiting the parallel winding section. This maintains the stability and continuity of the overall winding process while allowing for targeted adjustments to sections with significant local overlap. This helps reduce the adverse effects of large local overlaps and improves the performance of the common-mode inductor in high-frequency applications.

[0018] Furthermore, by establishing a quantitative relationship between the projection overlap length, the number of guide slot switching, and the circumferential offset angle, this application can also provide an engineering control basis for the path switching of the second winding, thereby enabling those skilled in the art to determine the position switching amount based on the target product parameters and winding equipment parameters, thus improving the feasibility and reproducibility of the solution. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a flowchart of a common-mode inductor winding control method according to an embodiment of this application; Figure 2 This is a schematic diagram of the common mode inductor winding system according to one embodiment of this application; Figure 3 This is a connection block diagram of the common mode inductor winding system described in one embodiment of this application; Figure 4 This is a block diagram of a winding control device according to an embodiment of this application.

[0021] Explanation of icon numbers: 100-Common Mode Inductor Winding System; 10-Magnetic core; 20 - First winding; 30 - Second winding; 40 - Winding window; 50 - Guiding mechanism; 60-Controller; 70 - Wire feeding mechanism; 80 - Cable routing mechanism; 90 - Wound actuator; 110 - Path information storage unit; 120 - Winding control equipment; 121 - Memory; 122 - Processor; 123 - Path Information Acquisition Module; 124 - Parallel winding section identification module; 125 - Position switching control module; 126 - Path recovery control module. Detailed Implementation

[0022] The following is combined Figures 1-4 This application will be further described below. It should be noted that the following embodiments are only used to illustrate this application and are not intended to limit the scope of protection of this application; where there is no conflict, the technical features of each embodiment can be combined with each other.

[0023] In one specific embodiment, this application provides a common-mode inductor winding control method, applied to a common-mode inductor winding system 100. The common-mode inductor winding system 100 may include a magnetic core 10, a first winding 20 and a second winding 30 wound within the same winding window 40 of the magnetic core 10, a guiding mechanism 50, a controller 60, a wire feeding mechanism 70, a wire laying mechanism 80, a winding execution mechanism 90, and a path information storage unit 110. The controller 60 is connected to the guiding mechanism 50, the wire feeding mechanism 70, the wire laying mechanism 80, the winding execution mechanism 90, and the path information storage unit 110, and is used to call preset window path information and control the second winding 30 to switch window paths within a local segment.

[0024] Specifically, the path information storage unit 110 can pre-store the preset window-passing path information of the first winding 20 and the second winding 30 within the winding window 40. The preset window-passing path information can be obtained in various ways. For example, it can be generated manually and stored in the path information storage unit 110, or it can be generated by an offline winding path simulation program based on the target core specifications, winding window size, number of turns parameters, and wire specifications, and then written into the path information storage unit 110. Alternatively, it can be automatically generated by the controller 60 by calling a preset winding template and combining it with target process parameters. The preset window-passing path information includes at least the entry position and exit position of the first winding 20 and the second winding 30 within the winding window 40, as well as the window-passing path extending from the entry position to the exit position.

[0025] Furthermore, the entry position can be understood as the circumferential position corresponding to the wire entering the winding window 40, the exit position can be understood as the circumferential position corresponding to the wire leaving the winding window 40, and the window path can be understood as the path formed by the wire extending from the entry position to the exit position within the winding window 40. The controller 60 can analyze the local spatial relationship between the first winding 20 and the second winding 30 within the winding window 40 based on the preset window path information, and accordingly perform subsequent parallel winding section identification and position switching control.

[0026] Example 1: In one specific embodiment, a single-pillar common-mode inductor is used as an example. The magnetic core 10 is a ferrite core, and the effective circumferential unfolded length of the winding window 40 is 4.80 mm. Both the first winding 20 and the second winding 30 are wound with enameled copper wire. The conductor diameter of the enameled copper wire is 0.16 mm, and the outer diameter with the insulating layer is 0.20 mm. The guiding mechanism 50 is provided with multiple selectable guide slots to allow the second winding 30 to switch paths within a local section. In the default state, the second winding 30 passes through the window via the first guide slot; during position switching, the second winding 30 passes through the window via the second guide slot, which is offset circumferentially along the winding window 40. The circumferential pitch angle A corresponding to two adjacent guide slots is 4°.

[0027] S10. Obtain the preset window path information of the first winding 20 and the second winding 30 within the winding window 40.

[0028] Specifically, the controller 60 reads the entry and exit positions of the first winding 20 and the second winding 30 within the winding window 40, as well as the window-passing path information, from the path information storage unit 110 or the preset winding program. The default window-passing path of the first winding 20 remains fixed, while the default window-passing path of the second winding 30 initially passes through the window continuously alongside the first winding 20 within a local interval. In this embodiment, the exit position of the second winding 30 is used as the switching item for explanation; that is, in the default state, the second winding 30 completes the window-passing through the exit position corresponding to the first guide slot, and in the switching state, it completes the window-passing through the exit position corresponding to the second guide slot.

[0029] S20. Identify the parallel winding section based on the preset window path information.

[0030] Specifically, the parallel winding section is a winding interval in which the first winding 20 and the second winding 30 pass continuously side by side along the winding direction within the same winding window 40, and on a cross section perpendicular to the winding direction, the projected overlap length of the adjacent conductor segments of the two windings along the circumference of the magnetic core 10 is greater than or equal to a preset length threshold L0. The controller 60 can identify the local path intervals of the first winding 20 and the second winding 30 according to the path segment index corresponding to the current turn position.

[0031] In this embodiment, after analyzing the preset window path information, it can be identified that the first winding 20 and the second winding 30 continuously pass through the window side-by-side along the winding direction in the local path interval corresponding to the 18th to 26th turns. In order to determine whether the local path interval belongs to the parallel winding section, a one-dimensional coordinate can be established on the section to be determined perpendicular to the winding direction, with the circumferential unfolding direction of the magnetic core 10. Let the projection interval of the adjacent conductor segment belonging to the first winding 20 be [X1, Y1]=[1.10, 1.42], and the projection interval of the adjacent conductor segment belonging to the second winding 30 be [X2, Y2]=[1.18, 1.50], then the projection overlap length L satisfies: L=max(0,min(Y1,Y2)-max(X1,X2)) Substituting the above values, we get: L=max(0,min(1.42,1.50)-max(1.10,1.18)) L = max(0, 1.42 - 1.18) L=0.24mm In this embodiment, the outer diameter of the conductor with insulation layer is 0.20 mm, and the preset length threshold L0 is 0.18 mm. When adjacent conductor segments of two windings are only slightly adjacent in the circumferential direction without significant overlap, position switching is not triggered; when the projected overlap length reaches or exceeds 0.18 mm, the corresponding local interval is identified as a parallel winding segment and subsequent position switching control is executed. Since the calculated projected overlap length L is 0.24 mm, which is greater than L0, the local path interval corresponding to the 18th to 26th turns can be identified as a parallel winding segment.

[0032] Furthermore, to illustrate the triggering boundary of this identification rule, on another cross section to be determined, let the projection range of the first winding 20 be [2.60, 2.88] and the projection range of the second winding 30 be [2.92, 3.20], then we have: L=max(0,min(2.88,3.20)-max(2.60,2.92)); L = max(0, 2.88 - 2.92); L=0; Since this value is less than L0 = 0.18 mm, this local path interval is not identified as a parallel winding section. Therefore, this identification rule does not trigger adjustment for all local adjacent paths, but only performs position switching control on local sections where the projected overlap length reaches the preset length threshold L0.

[0033] S30. When switching from a non-parallel winding section to a parallel winding section, switch one position of the second winding 30.

[0034] After identifying the parallel winding section, when the winding process switches from the non-parallel winding section to the parallel winding section, the entry and exit positions of the first winding 20 are kept unchanged, and one of the entry and exit positions of the second winding 30 is switched so that the window path of the second winding 30 in the parallel winding section is offset relative to the first winding 20 along the circumference of the magnetic core 10, thereby reducing the projected overlap length of the adjacent conductor segments of the two windings.

[0035] In this embodiment, the exit position of the second winding 30 is used as the switching item. That is, when entering the parallel winding section corresponding to the 18th to 26th turns, the first winding 20 maintains its original entry and exit positions, while the second winding 30 switches from the default exit position corresponding to the first guide slot to the target exit position corresponding to the second guide slot, thereby changing the window path of the second winding 30 in the parallel winding section. The guide mechanism 50 performs the corresponding slot switching action under the control of the controller 60.

[0036] Furthermore, when the switching of the aforementioned item is achieved through guide slot switching, the number N of guide slot switching can be determined based on the projection overlap length L before switching, the reduction in projection overlap length D corresponding to each switched guide slot, and the target projection overlap length threshold L1. Specifically, the number of guide slot switching items corresponding to the aforementioned item is determined by the smallest non-negative integer N satisfying the following formula: LN×D <L1; Where L is the projected overlap length in the parallel winding section before switching, D is the reduction in projected overlap length caused by switching a guide slot corresponding to the item, L1 is the target projected overlap length threshold after switching, and N is the number of guide slots switched.

[0037] In this embodiment, the following results can be obtained through pre-trial winding calibration: when the guide slot is not switched, the projected overlap length in the local section is approximately 0.24 mm; when one guide slot is switched, the projected overlap length is approximately 0.15 mm; when two guide slots are switched, the projected overlap length is approximately 0.06 mm. Therefore, the reduction in projected overlap length D corresponding to each switch of a guide slot is approximately 0.09 mm. Further, in this embodiment, the target projected overlap length threshold L1 is 0.08 mm. Then, when N=1, 0.24 - 1 × 0.09 = 0.15; when N=2, 0.24 - 2 × 0.09 = 0.06. Therefore, the smallest non-negative integer N that satisfies the condition is 2. Thus, the controller 60 controls the guide mechanism 50 to switch two guide slots circumferentially along the winding window 40 of the second winding 30.

[0038] Furthermore, after determining N=2, the circumferential offset angle B formed by the second winding 30 relative to the first winding 20 can be determined. Since the circumferential pitch angle A corresponding to two adjacent guide slots is 4°, then: B = N × A = 2 × 4° = 8°; When N is 2, the projected overlap length decreases from 0.24 mm to 0.06 mm, which is less than the target projected overlap length threshold L1 = 0.08 mm; the corresponding circumferential offset angle B is 8°. Under this offset angle condition, the second winding 30 is still within the adjustment range allowed by the guide mechanism 50, and there is no wire crossing the skeleton boundary, obvious wire crossing, or wire disorder. Thus, the projected overlap length in the parallel winding section is reduced, while the subsequent winding process remains continuous.

[0039] It should be noted that in this embodiment, parameter D can be obtained through pre-calibration. Specifically, under the same magnetic core specifications, wire specifications, and wire tension, the second winding 30 can be switched with 0, 1, 2, and 3 guide slots respectively, and the projected overlap length corresponding to the number of guide slots switched can be measured. If the difference in the projected overlap length corresponding to two adjacent switching numbers is relatively close, the average of the differences can be taken as D; if the difference is relatively stable only within a local linear interval, the average difference within that local linear interval can be taken as D. Thus, D can be avoided by directly setting it based on experience, and a parameter value that is more compatible with the target product can be obtained based on the trial winding results.

[0040] S40. When switching from a parallel winding section to a non-parallel winding section, restore the original window path.

[0041] After the parallel winding section is completed, when the winding process switches from the parallel winding section to a non-parallel winding section, the controller 60 controls the guide mechanism 50 to return the second winding 30 from the second guide slot to the first guide slot, thereby restoring its original window path before the switch. Thus, the position switch only applies to the target parallel winding section and does not continuously affect subsequent non-parallel winding sections, avoiding continuous impact on the wiring rhythm, insulation spacing, and overall winding formation of subsequent sections.

[0042] S50 controls the winding equipment to complete the winding of the first winding 20 and the second winding 30, and forms a common mode inductor.

[0043] After completing the aforementioned local path adjustment, the controller 60 continues to control the wire feeding mechanism 70, the wire laying mechanism 80, and the winding execution mechanism 90 to complete the remaining winding process of the first winding 20 and the second winding 30 according to the preset winding program, and combine them with the magnetic core 10 to form a common-mode inductor. Since the position switching is only performed within the identified parallel winding section and the original path is restored after leaving the section, it will not have a continuous impact on the winding process of subsequent non-target sections. Finally, while maintaining the continuity of the overall winding process, directional adjustment can be performed on sections with large local overlap, thereby reducing the projected overlap length of adjacent conductor segments of the two windings in the relevant section.

[0044] Example 2: In one specific embodiment, unlike Embodiment 1, the switched item in this embodiment is the entry window position of the second winding 30, rather than the exit window position, while the rest of the control logic remains the same. That is, after identifying that the first winding 20 and the second winding 30 have a parallel winding section within the same winding window 40, the entry and exit window positions of the first winding 20 are kept unchanged, while the exit window position of the second winding 30 is kept unchanged. Only the entry window position of the second winding 30 is switched, so that the window path of the second winding 30 within the parallel winding section is offset relative to the first winding 20 along the circumference of the magnetic core 10.

[0045] Specifically, in this embodiment, the magnetic core 10 still uses a ferrite core, the effective circumferential unfolded length of the winding window 40 is 5.20 mm, and the outer diameter of the conductor with insulation layer used in the first winding 20 and the second winding 30 is 0.22 mm. The second winding 30 has multiple guide slots distributed circumferentially along the winding window 40 on the window side, with a circumferential pitch angle A corresponding to two adjacent guide slots being 3.5°. In the default state, the window position of the second winding 30 corresponds to the first guide slot; in the position switching state, the window position of the second winding 30 corresponds to the second guide slot. The control logic, the parallel winding section identification method, and the method for determining the number of guide slots can all be consistent with the aforementioned embodiments.

[0046] In this embodiment, the controller 60 identifies that the first winding 20 and the second winding 30 pass through the window continuously side-by-side within the local path interval corresponding to the 12th to 19th turns, based on the preset window path information. Let the projection interval of the adjacent conductor segment belonging to the first winding 20 be [X1, Y1] = [0.95, 1.31], and the projection interval of the adjacent conductor segment belonging to the second winding 30 be [X2, Y2] = [1.03, 1.39], then the projection overlap length L can be calculated to be 0.28 mm. In this embodiment, the preset length threshold L0 is 0.20 mm. Since L is greater than L0, the local path interval corresponding to the 12th to 19th turns can be identified as a parallel winding section.

[0047] Further, in order to determine the number of guide groove position switches corresponding to the window entry position of the second winding 30, the relational expression L - N×D < L1 is still used. Through pre-winding calibration, the following results can be obtained in this embodiment: When the window entry position is not switched, the projection overlap length in the local section is about 0.28 mm; when 1 guide groove position is switched, the projection overlap length is about 0.18 mm; when 2 guide groove positions are switched, the projection overlap length is about 0.08 mm. Thus, D is about 0.10 mm. Further, in this embodiment, the target projection overlap length threshold L1 is taken as 0.10 mm, so when N = 1, the result is 0.18, and when N = 2, the result is 0.08. Therefore, the smallest non-negative integer N that satisfies the condition in this embodiment is 2.

[0048] Further, since the circumferential pitch angle A corresponding to two adjacent guide groove positions is 3.5°, the circumferential offset angle B corresponding to the window entry position of the second winding 30 satisfies B = N×A = 7°. When N is taken as 2, the projection overlap length decreases from 0.28 mm to 0.08 mm, which is less than the target projection overlap length threshold L1 = 0.10 mm; the corresponding circumferential offset angle B is 7°. Under this offset angle condition, the wire path on the window entry side of the second winding 30 is still within the adjustment range allowed by the guiding mechanism 50, and there is no situation where the window entry side is bent too much or the subsequent continuous arrangement of the through-window section is damaged. After completing the parallel winding section corresponding to the 12th to 19th turns, the controller 60 makes the second winding 30 return from the second guide groove position to the first guide groove position, thereby restoring its default window entry position, and continues to complete the winding of the subsequent non-parallel winding section according to the preset through-window path. Thus, it can be seen that when the switched item is the window entry position of the second winding 30, the control logic for identifying the parallel winding section, determining the number of guide groove position switches, and restoring the original through-window path can still be executed.

[0049] Embodiment Three: In a specific embodiment, this embodiment mainly illustrates how to determine the number of guide groove position switches of the second winding 30 by adjusting parameters such as L0, L1, D, and A under different product parameters and different target control requirements.

[0050] Specifically, in this embodiment, the common-mode inductor is wound with a smaller diameter wire, the outer diameter of the wire with insulation layer is 0.18 mm, the effective circumferential unfolded length of the winding window 40 is 4.20 mm, and the circumferential pitch angle A corresponding to two adjacent guide slots is 5°. Through preset window path information analysis, the first winding 20 and the second winding 30 are identified as continuously passing through the window side-by-side in the local path interval corresponding to the 9th to 15th turns. On a section to be judged, let the projection interval of the first winding 20 be [X1, Y1] = [0.72, 1.00], and the projection interval of the second winding 30 be [X2, Y2] = [0.80, 1.08], then the projection overlap length L is 0.20 mm. Considering that the outer diameter of the wire with insulation layer is smaller than in Embodiments 1 and 2, the parallel winding section judgment threshold L0 is set to 0.15 mm. Since L is greater than L0, this local path interval is identified as a parallel winding section.

[0051] Furthermore, in this embodiment, through pre-trial winding calibration, it was found that when the second winding 30 switches one guide slot, the projected overlap length decreases from 0.20mm to 0.12mm; when switching two guide slots, the projected overlap length decreases from 0.20mm to 0.04mm. Therefore, D is approximately 0.08mm. If the target projected overlap length threshold L1 is set to 0.10mm, the result is 0.12 when N=1 and 0.04 when N=2. Therefore, N=2 should be taken, with a corresponding circumferential offset angle B of 10°. However, for another product model, the local overlap control requirements are relaxed, only requiring the projected overlap length to be reduced to below 0.14mm. Then, while keeping other parameters unchanged, the result is 0.12 when N=1, meeting the control requirements. Therefore, only N=1 needs to be taken in this case, with a corresponding circumferential offset angle B of 5°. Therefore, under the same winding window 40 structure and guide slot pitch, different guide slot switching numbers N and corresponding circumferential offset angles B can be derived for different target projection overlap length thresholds L1.

[0052] Furthermore, given a conductor insulation layer outer diameter of 0.18mm, if L0=0.18mm and L1=0.08mm from Example 1 are still used as fixed parameters, it will be difficult to demonstrate the correspondence between parameters and product specifications in some local areas during the identification or control stages. Accordingly, in this embodiment, L0 is adjusted to 0.15mm based on the smaller conductor outer diameter, and L1 is set to 0.10mm or 0.14mm respectively according to the target product's requirements for local overlap control. Thus, under the same guide slot structure, different guide slot switching quantities N and corresponding circumferential offset angle B can be derived for different control objectives. Furthermore, in engineering implementation, parameter L0 can be set according to 70% to 100% of the conductor insulation layer outer diameter to screen local sections requiring trigger control; parameter L1 can be set according to the allowable degree of local overlap for the target product, typically less than L0, to ensure a significant decrease in local overlap level after position switching; parameter D can be obtained through pre-trial winding calibration; and parameter A can be determined by the guide slot structure. Therefore, those skilled in the art can reasonably set relevant parameters according to different core sizes, wire specifications and target performance requirements, and determine the number of guide slots to be switched in the second winding 30 accordingly.

[0053] In one specific embodiment, this application also provides a winding control device 120. The winding control device 120 may include a memory 121 and a processor 122. The memory 121 stores a computer program, and the processor 122, when executing the computer program, can implement the aforementioned winding control method for common-mode inductors. Further, the winding control device 120 may also include a path information acquisition module 123, a parallel winding section identification module 124, a position switching control module 125, and a path recovery control module 126. The path information acquisition module 123 is used to acquire preset window path information of the first winding 20 and the second winding 30 within the winding window 40; the parallel winding section identification module 124 is used to identify parallel winding sections based on the preset window path information; the position switching control module 125 is used to switch a position of the second winding 30 when switching from a non-parallel winding section to a parallel winding section; and the path recovery control module 126 is used to restore the original window path of the second winding 30 when switching from a parallel winding section to a non-parallel winding section. The winding control device 120 can be deployed independently or integrated into the controller 60 to realize the corresponding control functions.

[0054] In summary, this application identifies parallel winding sections by pre-setting window path information, and switches only one position of the second winding 30 when entering the section, and restores the original window path when leaving the section. Furthermore, by combining the calculation of the projected overlap length, the solution of the number of guide slot switching, and the determination of the circumferential offset angle, the corresponding common-mode inductor winding control can be realized.

[0055] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A winding control method for a high-frequency, low-loss common-mode inductor, applied to a winding device for a common-mode inductor, wherein the common-mode inductor includes a magnetic core and a first winding and a second winding wound within the same winding window of the magnetic core, characterized in that... Includes the following steps: S10. Obtain the preset window path information of the first winding and the second winding within the winding window; S20. Identify parallel winding sections based on the preset window path information; S30. When switching from a non-parallel winding section to the parallel winding section, keep the entry and exit positions of the first winding unchanged, and switch one of the entry and exit positions of the second winding so that the window path of the second winding in the parallel winding section is offset relative to the first winding along the circumferential direction of the magnetic core, thereby reducing the projected overlap length of the adjacent conductor segments of the two windings. S40. When switching from the parallel winding section to a non-parallel winding section, restore the original window path before the second winding switching; S50. Control the winding device to complete the winding of the first winding and the second winding, and combine them with the magnetic core to form the common mode inductor.

2. The winding control method for a high-frequency, low-loss common-mode inductor according to claim 1, characterized in that, The parallel winding section is a winding interval in which the first winding and the second winding pass through the same winding window continuously side by side along the winding direction, and on a cross section perpendicular to the winding direction, the projected overlap length of the wire segments of the two adjacent to each other along the circumference of the magnetic core is greater than or equal to a preset length threshold L0.

3. The winding control method for a high-frequency, low-loss common-mode inductor according to claim 2, characterized in that, Within the parallel winding section, the entry and exit positions of the first winding are kept unchanged, and only one of the entry and exit positions of the second winding is switched.

4. The winding control method for a high-frequency, low-loss common-mode inductor according to claim 3, characterized in that, The switching of the first item is achieved by switching the second winding from the currently corresponding first guide slot to the second guide slot, thereby changing the window path of the second winding within the same winding window.

5. The winding control method for a high-frequency, low-loss common-mode inductor according to claim 4, characterized in that, The second guide slot is offset relative to the first guide slot along the circumferential direction of the winding window, so that the window path formed by the second guide slot is offset relative to the window path formed by the first guide slot along the circumferential direction of the magnetic core.

6. The winding control method for a high-frequency, low-loss common-mode inductor according to claim 5, characterized in that, When the switching of the aforementioned item is achieved through guide slot switching, the number of guide slot switching corresponding to the aforementioned item is determined by the smallest non-negative integer N that satisfies the following formula: LN×D <L1; Where L is the projected overlap length in the parallel winding section before switching, D is the reduction in projected overlap length caused by switching a guide slot corresponding to the item, and L1 is the target projected overlap length threshold after switching.

7. The winding control method for a high-frequency, low-loss common-mode inductor according to claim 6, characterized in that, On the cross section to be determined perpendicular to the winding direction, the projection interval of adjacent wire segments belonging to the first winding along the circumference of the magnetic core is defined as [X1, Y1], and the projection interval of adjacent wire segments belonging to the second winding along the circumference of the magnetic core is defined as [X2, Y2]. Then the projection overlap length L satisfies: L=max(0,min(Y1,Y2)-max(X1,X2)); Among them, X1 <Y1,X2<Y2。 8. The winding control method for a high-frequency, low-loss common-mode inductor according to claim 6, characterized in that, Let A be the circumferential pitch angle corresponding to two adjacent guide slots, and let B be the circumferential offset angle corresponding to the aforementioned term, satisfying: B = N × A; The second winding is controlled to switch N guide slots along the circumferential direction of the winding window according to the circumferential offset angle B, so that the switched window path is offset from the original window path along the circumferential direction of the magnetic core.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, causes the processor to perform a winding control method for a high-frequency, low-loss common-mode inductor as described in any one of claims 1 to 8.

10. A winding control device for a common-mode inductor, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor causes the processor to perform a winding control method for a high-frequency, low-loss common-mode inductor as described in any one of claims 1 to 8.

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