High-temperature-resistant and high-humidity-resistant common mode inductor

Abstract

The utility model belongs to the technical field of inductors, and provides a high-temperature-resistant and high-humidity-resistant common-mode inductor which comprises a framework, a coil, a magnetic core, an adhesive tape and insulating paint. The creepage distance of the primary side and the secondary side under the action of high voltage is increased by increasing the size of the middle partition of the framework, and the reliability and the safety of the inductor are further improved.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to a common-mode inductor resistant to high temperature and high humidity. Background Technology

[0002] Inductors are fundamental electrical components, commonly used in switching power supplies, power transmission, and distribution circuits in electronic and power systems. Switching power supplies generate high-frequency switching noise during operation, which can propagate through power lines and cause electromagnetic interference to other electronic devices. Common-mode inductors suppress this high-frequency noise, improving the stability and reliability of the power supply and preventing noise from interfering with other circuits. In power transmission and distribution, various electromagnetic interferences can occur, leading to voltage fluctuations and current instability. Common-mode inductors filter out common-mode interference, ensuring the reliability and stability of the power supply and reducing the impact of electromagnetic interference on the power grid.

[0003] Traditional common-mode inductors, when used in high-temperature and high-humidity environments, are prone to arcing and breakdown due to the water absorption of the bakelite frame and insufficient inductor creepage distance. This can lead to product failure, affecting power supply and transmission. Furthermore, arcing in common-mode inductors can cause circuit instability or malfunctions. These problems directly result in damage to electronic products, performance degradation of electronic devices, and even data loss. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a common mode inductor that is resistant to high temperature and high humidity, solve the creepage problem of traditional inductors, and improve the stability and durability of inductors in high temperature and high humidity environments.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A high-temperature and high-humidity resistant common-mode inductor includes: a frame, a coil, a magnetic core, an adhesive tape, and an insulating varnish; the thickness of the intermediate spacing of the frame is 1 to 3 mm; metal leads are embedded at the bottom of the frame; the metal leads are packaged in either through-hole or surface-mount type.

[0007] The coil is wound in the grooves on both sides of the middle partition of the skeleton; the magnetic core is inserted into and engaged in the square hole of the skeleton; the tape is wound on the magnetic core; and the insulating varnish covers the outside of the skeleton and the tape.

[0008] Preferably, the external dimensions of the skeleton range from 8 to 18 mm.

[0009] Preferably, the magnetic core includes either EE mirror type or UU mirror type.

[0010] Preferably, the magnetic core is assembled in either a vertical structure with the top and bottom aligned or a horizontal structure with the left and right aligned.

[0011] Preferably, the external dimensions of the magnetic core range from 8 to 18 mm.

[0012] Preferably, the metal pins include either PIN pins or SMT pins; the number of pins includes any one of 4 pins, 6 pins, and 8 pins.

[0013] The present invention discloses the following technical effects:

[0014] This invention provides a high-temperature and high-humidity resistant common-mode inductor. By increasing the size of the middle spacing of the frame, it solves the problem of arcing and breakdown caused by insufficient creepage distance in traditional common-mode inductors, and increases the creepage distance between the primary and secondary sides under high voltage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A structural diagram of a high-temperature and high-humidity common-mode inductor provided for an embodiment of this utility model;

[0017] Figure 2 A schematic diagram of the needle-and-thread package provided in an embodiment of this utility model;

[0018] Figure 3 A schematic diagram of the finished pin provided in the embodiment of this utility model;

[0019] Figure 4 A schematic diagram of the surface mount skeleton provided in an embodiment of this utility model;

[0020] Figure 5 A schematic diagram of a surface-mount coil provided for an embodiment of this utility model;

[0021] Figure 6 A schematic diagram of the finished surface-mount product provided in the embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-Frame, 11-Intermediate separator, 2-Metal pin, 3-Wire coil, 4-Magnetic core, 5-Tape. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The purpose of this invention is to provide a common-mode inductor that is resistant to high temperature and high humidity, which solves the creepage problem of traditional inductors and improves the stability and durability of inductors in high temperature and high humidity environments.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Figure 1 This is a structural diagram of a high-temperature and high-humidity common-mode inductor provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the needle and thread package provided in an embodiment of the present utility model. Figure 3 This is a schematic diagram of the finished pin provided in an embodiment of the present utility model. Figure 4 This is a schematic diagram of the surface mount skeleton provided in an embodiment of the present utility model. Figure 5 This is a schematic diagram of a surface-mount coil provided in an embodiment of the present invention. Figure 6 A schematic diagram of the surface-mount finished product provided in the embodiment of this utility model is shown below. Figures 1 to 6 As shown, this utility model provides a high-temperature and high-humidity resistant common-mode inductor, comprising: a frame 1, a coil 3, a magnetic core 4, an adhesive tape 5, and an insulating varnish; the thickness of the intermediate spacing 11 of the frame 1 is 1 to 3 mm; a metal pin 2 is embedded at the bottom of the frame 1; the package form of the metal pin 2 includes either through-hole type or surface mount type;

[0028] The coil 3 is wound around the grooves on both sides of the middle partition 11 of the frame 1; the magnetic core 4 is inserted into and engaged in the square hole of the frame 1; the tape 5 is wound around the magnetic core 4; and the insulating varnish is covered on the outside of the frame 1 and the tape 5.

[0029] Preferably, the external dimensions of the skeleton 1 range from 8 to 18 mm.

[0030] Optionally, the magnetic core 4 includes either the EE mirror type or the UU mirror type.

[0031] Optionally, the magnetic core 4 can be assembled in either a vertical structure with the top and bottom aligned or a horizontal structure with the left and right aligned.

[0032] Preferably, the external dimensions of the magnetic core 4 range from 8 to 18 mm.

[0033] Optionally, the metal pin 2 includes either a PIN or an SMT pin; the number of pins includes any one of 4 pins, 6 pins, and 8 pins.

[0034] Specifically, the structural features of this high-temperature and high-humidity common-mode inductor include: a frame 1, a coil 3 (two sets of metal insulated wires wound around the frame 1 to form a core 4 (EE or UU type made of soft magnetic ferrite material with high conductivity), an adhesive tape 5 for fixing and insulation, and an adhesive (insulating varnish, which is a transparent material) for insulation, moisture protection, and oil protection.

[0035] Preferably, the magnetic core 4 is placed into the coil 3 formed by the skeleton 1 and the enameled wire, and then the magnetic core 4 is joined together. The joined magnetic core 4 is then wrapped with tape 5 to ensure that the two pairs of magnetic core 4 are tightly joined together. Then the product is placed in an insulating adhesive for vacuum impregnation.

[0036] Optionally, the high-temperature and high-humidity common-mode inductor frame 1 can be further divided into two types: coated and uncoated, depending on different technical requirements after the wire is wound between the two slots.

[0037] Preferably, the frame 1 is injection molded from a high-temperature and high-humidity resistant insulating material, typically using materials such as PM9820, PM9823, PM9630, and WH8100.

[0038] Optionally, the wire material of coil 3 is enameled copper wire, enameled alloy wire, etc., which have good insulation and temperature resistance; coil 3 is formed by winding two sets of metal enameled wire with the same number of turns between the two slots of skeleton 1.

[0039] Furthermore, the magnetic core 4 is made of a soft magnetic ferrite material with high conductivity.

[0040] Preferably, the base of the tape 5 includes materials such as polyesterimide, Teflon or PET, which have good high temperature resistance, insulation and adhesion, and can be used to fix the magnetic core 4 and the coil 3, increasing the stability and insulation of the common mode inductor structure.

[0041] Furthermore, insulating varnish has the functions of high voltage resistance, waterproofing, moisture resistance, and corrosion resistance.

[0042] Specifically, the finished product dimensions of high temperature and high humidity common mode inductors are typically in the range of 8mm to 18mm.

[0043] Optionally, high temperature and high humidity common mode inductors can be classified into two types according to their packaging: through-hole type and surface-mount type.

[0044] Specifically, the PIN or SMT pins of the high temperature and high humidity resistant common mode inductor are any one of 4 pins (2+2), 6 pins (2+4 or 3+3), or 8 pins (4+4).

[0045] Furthermore, the high-temperature and high-humidity common-mode inductor is optimized to ensure normal operation even in high-temperature and high-humidity environments.

[0046] Specifically, the frame 1 and the enameled wire wound in the two slots of the frame 1 form a coil 3; the two sets of wire leads (4 wire ends) of the coil 3 are respectively wound around the corresponding pins of the frame 1; after the coil 3 is wound around the frame 1 and the pins are hung, it is placed in the solder pot for pin soldering to make it conductive; the magnetic core 4 is inserted into the square holes in the frame 1 from the left and right sides and is aligned; the tape 5 is wrapped around the aligned magnetic core 4 to fix the magnetic core 4; the product with the magnetic core 4 already fixed is placed in insulating varnish for vacuum impregnation and drying, which serves to fix the components and provide insulation.

[0047] The beneficial effects of this utility model are as follows:

[0048] This invention increases the creepage distance of the primary and secondary sides under high voltage by increasing the size of the middle spacing of the frame, thereby further improving the reliability and safety of the inductor.

[0049] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0050] This document uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. Furthermore, those skilled in the art will recognize that, based on the ideas of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high temperature and high humidity resistant common mode inductor, characterized by, include: The frame, coil, magnetic core, tape, and insulating varnish; The thickness of the intermediate spacing of the skeleton is 1 to 3 mm; the bottom of the skeleton is embedded with metal pins; the package form of the metal pins includes either through-hole type or surface mount type; the outer dimensions of the skeleton range from 8 to 18 mm; the outer dimensions of the magnetic core range from 8 to 18 mm. The coil is wound in the grooves on both sides of the middle partition of the skeleton; the magnetic core is inserted into and engaged in the square hole of the skeleton; the tape is wound on the magnetic core; and the insulating varnish covers the outside of the skeleton and the tape.

2. The high temperature and high humidity resistant common mode inductor of claim 1, wherein, The magnetic core includes either EE mirror type or UU mirror type.

3. The high temperature and high humidity resistant common mode inductor of claim 1, wherein, The magnetic core can be assembled in either a vertical structure with the top and bottom aligned or a horizontal structure with the left and right aligned.

4. The high temperature and high humidity resistant common mode inductor of claim 1, wherein, The metal pins include either PIN pins or SMT pins; the number of pins includes any one of 4 pins, 6 pins, and 8 pins.

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