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CN-224232462-U - CAN common mode inductance of layering subregion wire winding

CN224232462UCN 224232462 UCN224232462 UCN 224232462UCN-224232462-U

Abstract

The utility model discloses a CAN common mode inductor with layered and partitioned windings, and relates to the technical field of common mode inductors. The coil winding structure divides a wound magnetic core into three functional areas along the axial direction, wherein the three functional areas are formed by a middle functional area and side functional areas which are arranged on two sides of the middle functional area, the coil winding of the middle functional area adopts sparse winding with low turns, the coil winding of the side functional area adopts dense winding with high turns, the coil winding structure adopts a two-layer winding structure, and a transition winding area is arranged between the middle functional area and the side functional area. The utility model solves the problems of low-frequency interference and high-frequency interference, and can solve the problem that heat generated in the middle cannot dissipate heat, thereby improving the stability and quality of products, and relieving the temperature rise problem caused by DCR.

Inventors

  • GUO XINHUA
  • Xiao nanhai
  • YAN XINFA
  • HONG HAIXIA
  • YANG BIN

Assignees

  • 上海音特电子有限公司

Dates

Publication Date
20260512
Application Date
20250422

Claims (6)

  1. 1. The utility model provides a CAN common mode inductance of layering subregion wire winding, includes closed ring type iron core (1) and sets up in welding pin (13) of closed ring type iron core (1) one end, closed ring type iron core (1) bilateral symmetry is provided with the coil winding structure of concentric layering wire winding overall arrangement, its characterized in that: The coil winding structure divides a wound magnetic core into three functional areas along the axial direction, wherein the three functional areas are formed by a middle functional area (A) and side functional areas (B) which are arranged at two sides of the middle functional area (A), the coil winding of the middle functional area (A) adopts sparse winding with low turns, and the coil winding of the side functional area (B) adopts dense winding with high turns; The coil winding structure adopts a two-layer winding structure consisting of a first-layer winding coil (11) and a second-layer winding coil (12); a transition winding area (C) is arranged between the middle functional area (A) and the side functional area (B), a single-layer winding coil on the transition winding area (C) adopts inclined 45-degree transition, and two layers of winding coils are arranged in a crossing way.
  2. 2. The CAN common mode inductor of claim 1 wherein the gap formed between the single layer winding on the side functional area (B) is less than 0.5 times the diameter of the winding profile.
  3. 3. The CAN common mode inductor of claim 1 wherein the gap formed between the single layer winding on the intermediate functional area (a) is greater than 0.5 times the diameter of the winding profile.
  4. 4. The layered and partitioned wound CAN common mode inductor according to claim 1, wherein the winding direction of the first layer winding coil (11) is opposite to the winding direction of the second layer winding coil (12), the first layer winding coil (11) is an inner layer, and the second layer winding coil (12) is an outer layer.
  5. 5. The CAN common mode inductor of claim 1, wherein the first layer winding coil (11) and the second layer winding coil (12) are arranged at initial winding positions on the closed loop core (1) in a staggered manner.
  6. 6. The CAN common mode inductor of claim 1 wherein said transition winding area (C) is defined by the same width taken from the intersection extension line of two layers of wound coils to both sides, said width being the radial width of the intersection vanishing point along the core in elevation.

Description

CAN common mode inductance of layering subregion wire winding Technical Field The utility model belongs to the technical field of common-mode inductors, and particularly relates to a CAN common-mode inductor with layered and partitioned windings. Background In automobiles and industrial circuits, CAN communication protocols are widely used by virtue of high reliability. The common mode inductance is very important as a key component for suppressing common mode interference and ensuring signal stability. At present, the traditional common-mode inductance winding structure has the following problems that (1) the winding structure of the traditional common-mode inductance adopts double-wire parallel winding or multi-layer same-direction winding, leads to disordered wire arrangement, the distribution characteristics of magnetic fields and currents in a magnetic core cannot be fully considered, the dynamic DCR is too high, the high DCR not only CAN lead the power loss to become large when the common-mode inductance works and generate serious temperature rise, shortens the service life of the inductance and CAN influence the stability of the performance, but also has poor suppression effect on common-mode noise when facing high-frequency complex electromagnetic interference, and (2) the winding structure of the traditional common-mode inductance does not carry out refined partition treatment on the magnetic core, so that the common-mode inductance cannot exert optimal performance under different working conditions, and the requirements of the automobile and industrial fields on high reliability and high stability of continuous improvement of CAN communication are met. Disclosure of utility model The utility model provides a CAN common mode inductor with layered and partitioned winding, which adopts a layered and partitioned winding structure to divide a magnetic core into three functional areas consisting of a middle functional area and side functional areas at two sides along the axial direction, wherein the middle functional area adopts sparse winding to solve the problem of low-frequency interference and CAN solve the problem that heat generated in the middle cannot be dissipated, the side functional areas at two sides adopt dense winding to solve the problem of high-frequency interference, and the dynamic DCR temperature rise problem of the inductor CAN be relieved by conducting heat through the magnetic core, so that the stability and quality of a product CAN be improved, the temperature rise problem caused by DCR CAN be relieved, and the problems in the background technology CAN be solved in sum. In order to solve the technical problems, the utility model is realized by the following technical scheme: The CAN common mode inductor comprises a closed ring type iron core and welding pins arranged at one end of the closed ring type iron core, wherein coil winding structures in concentric layered winding layout are symmetrically arranged at two sides of the closed ring type iron core; The coil winding structure axially divides a wound magnetic core into three functional areas consisting of a middle functional area and side functional areas arranged on two sides of the middle functional area, the coil winding of the middle functional area adopts sparse winding with low turns, and the coil winding of the side functional area adopts dense winding with high turns; The coil winding structure adopts a two-layer winding structure consisting of a first layer of winding coils and a second layer of winding coils; A transition winding area is arranged between the middle functional area and the side functional area, a single-layer winding coil on the transition winding area adopts inclined 45-degree transition, and two layers of winding coils are arranged in a crossing way. Further, the gap formed between the single-layer winding coils on the side functional areas is smaller than 0.5 times of the diameter of the winding coil profile. Further, the gap formed between the single-layer winding coils on the intermediate functional area is larger than 0.5 times of the diameter of the winding coil profile. Further, the winding direction of the first layer winding coil is opposite to that of the second layer winding coil, the first layer winding coil is an inner layer, and the second layer winding coil is an outer layer. Further, the initial winding positions of the first layer winding coil and the second layer winding coil on the closed ring type iron core are staggered. Further, the transition winding area is determined by taking the same width from the extension line of the intersection point of the two layers of winding coils to two sides, and the width is the radial width of the vanishing point of the intersection line along the magnetic core in front view. Compared with the prior art, the utility model has the following beneficial effects: (1) The magnetic core is axially divided into three functional areas consisting of a mi