An E-type pressed powder core

Abstract

The invention discloses an E-type pressed powder magnetic core, comprising a first side body, a second side body and a winding column, wherein the first side body and the second side body are symmetrical with respect to the center of the winding column, the first side body, the second side body and the winding column are all formed by pressing a bottom layer, an interlayer and a top layer, the middle parts of the first side body and the second side body are respectively provided with a first through hole, the middle part of the winding column is provided with a second through hole, the interiors of the two first through holes are respectively provided with a first heat conducting pipe, the interiors of the second through hole are provided with a second heat conducting pipe, the upper ends of the two first heat conducting pipes are respectively connected with a first heat dissipation tooth, the upper ends of the second heat conducting pipes are connected with a second heat dissipation tooth, the lower ends of the first heat conducting pipes and the second heat conducting pipes are connected with a heat dissipation pipe, and the left and right sides of the heat dissipation pipes are respectively provided with spiral pipes, the magnetic core has low cost, and both the upper and lower ends thereof can dissipate heat, the heat dissipation effect is good, the heat dissipation effect is reliable, and the assembly is simple and convenient, and the production and manufacturing are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of E-type pressed powder magnetic cores, and specifically relates to an E-type pressed powder magnetic core. Background Art

[0002] With the development of electronic information technology, the components made of magnetic materials are required to develop in the direction of high frequency, miniaturization and intelligence. As the key components of the circuit, the components made of magnetic materials have a strong demand for the increase of the frequency of use. They are widely used in computers, mobile phones, automation equipment and electronic transformers. The magnetic core refers to a sintered magnetic metal oxide composed of a mixture of various iron oxides. It is widely used in coils and transformers of various electronic devices. With the development of technology, electronic products are gradually developing in the direction of miniaturization and high power. The magnetic core will emit a lot of heat during operation, which will inevitably cause the electromagnetic device to heat up quickly. If the heat is not dissipated in time, the electromagnetic device may be damaged. Therefore, the heat dissipation function of the magnetic core is a focus and emphasis of the industry. At present, the industry mostly uses the case and thermal pad to dissipate heat, but this method is unstable in heat dissipation, and often causes unreliable heat dissipation due to the deformation of the thermal pad, and the cost is high. Therefore, we provide an E-type pressed powder magnetic core. Summary of the invention

[0003] The object of the present invention is to provide an E-type pressed powder magnetic core to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an E-type pressed powder core, comprising a first side body, a second side body and a winding post, the first side body is located on the left side of the winding post, the second side body is located on the right side of the winding post, the first side body and the second side body are symmetrical with respect to the center of the winding post, the first side body, the second side body and the winding post are all pressed by a bottom layer, an interlayer and a top layer, the interlayer is located on the upper surface of the bottom layer, the top layer is located on the upper surface of the interlayer, the middle parts of the first side body and the second side body are respectively provided with a first through hole, the middle part of the winding post is provided with a second through hole, the insides of the two first through holes are respectively provided with a first heat conducting pipe, the insides of the second through holes are provided with a second heat conducting pipe, the upper ends of the two first heat conducting pipes are respectively connected with a first heat dissipation tooth, the upper ends of the second heat conducting pipe are connected with a second heat dissipation tooth, the lower ends of the first heat conducting pipe and the second heat conducting pipe are connected with a heat dissipation pipe, and the left and right sides of the heat dissipation pipe are respectively provided with a spiral pipe.

[0005] Preferably, bolts are provided between the first heat conducting pipe and the first heat dissipating tooth and between the second heat conducting pipe and the second heat dissipating tooth, respectively, and the first heat conducting pipe and the first heat dissipating tooth and the second heat conducting pipe and the second heat dissipating tooth are connected respectively by bolts.

[0006] Preferably, the first side body, the second side body and the winding post have the same height, the first side body and the second side body have the same width, and the width of the winding post is twice that of the first side body and the second side body.

[0007] Preferably, the diameters of the two first heat conducting pipes are smaller than the diameters of the left and right ends of the heat dissipation pipe, and the left and right sides of the lower end of the bottom layer are respectively provided with limiting grooves, and the limiting grooves match the left and right ends of the heat dissipation pipe.

[0008] Preferably, the material of the bottom layer is ferric oxide, the material of the interlayer is nickel oxide, and the material of the top layer is zinc oxide.

[0009] Preferably, the material of the bottom layer is ferric oxide, the material of the interlayer is manganese, and the material of the top layer is zinc.

[0010] Preferably, the material of the bottom layer is nickel, the material of the interlayer is molybdenum, and the material of the top layer is iron.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the heat generated by the first side body and the second side body of an E-type pressed powder magnetic core enters the first heat conducting tube, the heat is transferred to the upper end of the first heat conducting tube and enters the first heat dissipation tooth, and the heat is transported to the air through the first heat dissipation tooth to complete the heat dissipation, when the heat is transported to the lower end of the first heat conducting tube, it is transferred to the heat dissipation tube, and the heat is transported to the air through the spiral tube on the heat dissipation tube, the heat generated by the winding column enters the second heat conducting tube, the second heat conducting tube transfers the heat to its upper and lower ends respectively, after being transferred to its own upper end, the heat enters the second heat dissipation tooth, and is dissipated into the air through the second heat dissipation tooth, after the heat is transferred to its own lower end, the heat enters the heat dissipation tube, and then is dissipated into the air through the spiral tube, thereby realizing double heat dissipation of the upper and lower ends of the magnetic core, with good heat dissipation effect, good heat dissipation performance, high reliability, and the assembly process of the present invention is simple and convenient, and is easy to produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0014] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0015] Figure 4 for Figure 2 Enlarged schematic diagram of point B in the middle.

[0016] In the figure: 1-first side body, 2-second side body, 3-winding column, 4-bottom layer, 5-interlayer, 6-top layer, 7-first through hole, 8-second through hole, 9-first heat pipe, 10-second heat pipe, 11-first heat dissipation tooth, 12-second heat dissipation tooth, 13-heat dissipation pipe, 14-spiral tube, 15-bolt, 16-limiting groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1

[0019] See also Figure 1-4The present invention provides a technical solution: an E-type pressed powder magnetic core, comprising a first side body 1, a second side body 2 and a winding post 3, wherein the first side body 1 is located on the left side of the winding post 3, and the second side body 2 is located on the right side of the winding post 3, the first side body 1 and the second side body 2 are symmetrical with respect to the center of the winding post 3, the first side body 1, the second side body 2 and the winding post 3 are all pressed by a bottom layer 4, an interlayer 5 and a top layer 6, the interlayer 5 is located on the upper surface of the bottom layer 4, and the top layer 6 is located on the upper surface of the interlayer 5, the first side body 1 and the second side body 2 are respectively provided with a first through hole 7 in the middle, the second through hole 8 is provided with a second through hole 8 in the middle of the winding post 3, the first heat conducting pipe 9 is respectively provided inside the two first through holes 7, the second heat conducting pipe 10 is provided inside the second through hole 8, the upper ends of the two first heat conducting pipes 9 are respectively connected with a first heat dissipation tooth 11, the upper ends of the second heat conducting pipe 10 are connected with a second heat dissipation tooth 12, the lower ends of the first heat conducting pipe 9 and the second heat conducting pipe 10 are respectively connected with a first heat dissipation tooth 12, and the lower ends of the first heat conducting pipe 9 and the second heat conducting pipe 10 are respectively connected with a first heat dissipation tooth 11. The end is connected with a heat dissipation pipe 13, and the left and right sides of the heat dissipation pipe 13 are respectively provided with a spiral pipe 14. The spiral pipe 14 is a spiral copper pipe, and the spiral shape helps to dissipate heat. When working, the heat generated by the first side body 1 and the second side body 2 enters the first heat-conducting pipe 9, and the heat is transmitted to the upper end of the first heat-conducting pipe 9 and enters the first heat dissipation tooth 11. The heat is transported to the air through the first heat dissipation tooth 11 to complete the heat dissipation. When the heat is transported to the lower end of the first heat-conducting pipe 9, it is transferred to the heat-conducting pipe 13, and the heat is transported to the air through the spiral pipe 14 on the heat-conducting pipe 13. The heat generated by the winding column 3 enters the second heat-conducting pipe 10, and the second heat-conducting pipe 10 transfers the heat to its upper and lower ends respectively. After being transferred to its own upper end, the heat enters the second heat-conducting tooth 12, and is dissipated into the air through the second heat-conducting tooth 12. After the heat is transferred to its own lower end, the heat enters the heat-conducting pipe 13, and then is dissipated into the air through the spiral pipe 14, thereby realizing double heat dissipation of the upper and lower ends of the magnetic core, with high heat dissipation effect and reliability.

[0020] Specifically, bolts 15 are respectively provided between the first heat conducting pipe 9 and the first heat dissipation tooth 11 and between the second heat conducting pipe 10 and the second heat dissipation tooth 12. The first heat conducting pipe 9 and the first heat dissipation tooth 11 and the second heat conducting pipe 10 and the second heat dissipation tooth 12 are respectively connected by the bolts 15. When in use, the bolts 15 are passed through the first heat dissipation tooth 11 and the second heat dissipation tooth 12, and then the lower ends of the bolts 15 are respectively threadedly connected to the first heat conducting pipe 9 and the second heat conducting pipe 10. This connection method is simple to operate, convenient to connect, easy to manufacture, and highly reliable.

[0021] Specifically, the heights of the first side body 1, the second side body 2 and the winding post 3 are equal, the widths of the first side body 1 and the second side body 2 are the same, and the width of the winding post 3 is 2-4 times that of the first side body 1 and the second side body 2. The size design of this type of pressed powder magnetic core is reasonable, the effective working area of ​​the magnetic core is large, and the stability and reliability of the electromagnetic properties of the magnetic core are high.

[0022] Specifically, the diameter of the two first heat conducting tubes 9 is smaller than the diameter of the left and right ends of the heat dissipation tube 13. The left and right sides of the lower end of the bottom layer 4 are respectively provided with limiting grooves 16. The limiting grooves 16 on the left and right sides are respectively connected with the first through holes 7. The limiting grooves 16 match the left and right ends of the heat dissipation tube 13. During installation, the left and right ends of the heat dissipation tube 13 are respectively inserted into the limiting grooves 16 on the left and right sides, thereby realizing the limiting process of the heat dissipation tube 13 and ensuring the installation accuracy of the heat dissipation tube 13. At the same time, the limiting grooves 16 can ensure the stability of the heat dissipation tube 13 to a certain extent, thereby ensuring the durability of the device.

[0023] Specifically, the material of the bottom layer 4 is ferric oxide, the material of the interlayer 5 is nickel oxide, and the material of the top layer 6 is zinc oxide. The pressed powder magnetic core is pressed from ferric oxide, nickel oxide, and zinc oxide. This kind of magnetic core is easy to be magnetically saturated, has the characteristics of low power consumption under high frequency and high magnetic flux density conditions, and has a small surface resistance, which is almost equivalent to a good conductor of electricity, and is often used in high-inductance toroidal inductors.

[0024] Working principle: When the present invention is used, the first heat conducting pipe 9 and the second heat conducting pipe 10 are respectively installed in the first through hole 7 and the second through hole 8, the heat dissipation pipe 13 is installed at the lower end of the bottom layer 4, and then the first heat dissipation teeth 11 and the second heat dissipation teeth 12 are respectively connected to the first heat conducting pipe 9 and the second heat conducting pipe 10 to complete the assembly. The assembly process is simple and convenient. When working, the heat generated by the first side body 1 and the second side body enters the first heat conducting pipe 9, and the heat is transmitted to the upper end of the first heat conducting pipe 9 and enters the first heat dissipation teeth 11. The heat is transported to the air through the first heat dissipation teeth 11 to complete the heat dissipation. When the heat is transported to the lower end of the first heat-conducting tube 9, it is transferred to the heat dissipation tube 13, and the heat is transported to the air through the spiral tube 14 on the heat dissipation tube 13. The heat generated by the winding column 3 enters the second heat-conducting tube 10, and the second heat-conducting tube 10 transfers the heat to its upper and lower ends respectively. After the heat is transferred to its upper end, the heat enters the second heat dissipation tooth 12, and is dissipated into the air through the second heat dissipation tooth 12. After the heat is transferred to its lower end, the heat enters the heat dissipation tube 13, and then is dissipated into the air through the spiral tube 14, thereby realizing double heat dissipation of the upper and lower ends of the magnetic core, with good heat dissipation effect and high reliability.

[0025] Embodiment 2

[0026] See also Figure 1 and Figure 2The present invention provides a technical solution which is different from the technical solution in Example 1 only in that: the material of the bottom layer 4 is ferric oxide, the material of the interlayer 5 is manganese, and the material of the top layer 6 is zinc. This pressed powder magnetic core is pressed from ferric oxide, manganese powder and zinc powder. This magnetic core has high saturation induction intensity, can work under large current, has stable performance, and has excellent frequency characteristics of effective magnetic permeability and high temperature characteristics, and is suitable for a temperature range of -65°C to +125°C.

[0027] Embodiment 3

[0028] See also Figure 1 and Figure 2 The present invention provides a technical solution which is different from the technical solution in Example 1 only in that: the material of the bottom layer 4 is nickel, the material of the interlayer 5 is molybdenum, and the material of the top layer 6 is iron. This pressed powder magnetic core is pressed from nickel, molybdenum, and iron. This kind of magnetic core has stable characteristics, small variability, and low cost. It is the preferred magnetic core for general choke coils. This kind of magnetic core has a high surface impedance, is an electrical insulator, and has the characteristics of low impedance at low frequencies and high impedance at high frequencies.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An E-type pressed powder magnetic core, comprising a first side body (1), a second side body (2) and a winding column (3), characterized in that: The first side body (1) is located on the left side of the winding post (3), and the second side body (2) is located on the right side of the winding post (3). The first side body (1) and the second side body (2) are symmetrical with respect to the center of the winding post (3). The first side body (1), the second side body (2) and the winding post (3) are all formed by pressing a bottom layer (4), an interlayer (5) and a top layer (6). The interlayer (5) is located on the upper surface of the bottom layer (4), and the top layer (6) is located on the upper surface of the interlayer (5). The first side body (1) and the second side body (2) are respectively provided with a first through hole (7) in the middle. ), a second through hole (8) is provided in the middle of the winding column (3), a first heat conducting pipe (9) is provided inside each of the two first through holes (7), a second heat conducting pipe (10) is provided inside the second through hole (8), the upper ends of the two first heat conducting pipes (9) are respectively connected to first heat dissipation teeth (11), the upper end of the second heat conducting pipe (10) is connected to a second heat dissipation tooth (12), the lower ends of the first heat conducting pipe (9) and the second heat conducting pipe (10) are connected to a heat dissipation pipe (13), and spiral pipes (14) are provided on the left and right sides of the heat dissipation pipe (13); Bolts (15) are provided between the first heat-conducting pipe (9) and the first heat-dissipating tooth (11), and between the second heat-conducting pipe (10) and the second heat-dissipating tooth (12), respectively; the first heat-conducting pipe (9) and the first heat-dissipating tooth (11), and between the second heat-conducting pipe (10) and the second heat-dissipating tooth (12), respectively, are connected via the bolts (15).

2. The E-type pressed powder magnetic core according to claim 1, characterized in that: The first side body (1), the second side body (2) and the winding post (3) have the same height, the first side body (1) and the second side body (2) have the same width, and the width of the winding post (3) is 2 to 4 times that of the first side body (1) and the second side body (2).

3. The E-type pressed powder magnetic core according to claim 1, characterized in that: The diameters of the two first heat conducting tubes (9) are smaller than the diameters of the left and right ends of the heat dissipation tube (13), and the left and right sides of the lower end of the bottom layer (4) are respectively provided with limit grooves (16), and the limit grooves (16) match the left and right ends of the heat dissipation tube (13).

4. The E-type pressed powder magnetic core according to claim 1, characterized in that: The material of the bottom layer (4) is ferric oxide, the material of the interlayer (5) is nickel oxide, and the material of the top layer (6) is zinc oxide.

5. The E-type pressed powder magnetic core according to claim 1, characterized in that: The material of the bottom layer (4) is ferric oxide, the material of the interlayer (5) is manganese, and the material of the top layer (6) is zinc.

6. The E-type pressed powder magnetic core according to claim 1, characterized in that: The material of the bottom layer (4) is nickel, the material of the interlayer (5) is molybdenum, and the material of the top layer (6) is iron.

Images