CN210956373U - Magnetic part - Google Patents

Abstract

The utility model provides a magnetism spare, magnetism spare includes: the magnetic part comprises a winding section; the coil is arranged around the winding section; and the heat dissipation unit comprises a heat conduction section and a heat dissipation section, the heat dissipation unit is arranged at the position of the zero position of the magnetic field of the coil and is not closed, the heat conduction section is in contact with the magnetic core and/or the coil, and the heat dissipation section is connected with the heat conduction section for heat dissipation. The utility model discloses a set up the heat dissipation unit, set up the heat conduction section of heat dissipation unit in the position of magnetic field zero-bit, thereby the heat dissipation section is gone out the heat transfer and is dispelled the heat, has improved the heat-sinking capability of magnetic part greatly, has solved the poor problem of current magnetic part heat dissipation capacity to the help improves the power density of magnetic part, further reduce cost.

Description

Magnetic part

Technical Field

The utility model relates to a new energy automobile electron technical field, in particular to magnetism spare.

Background

In a new energy automobile on-board charger (OBC), common circuit topologies include LLC, CLLC, Boost LLC, etc., a circuit is shown in fig. 1 (fig. 1a is an LLC circuit topology, fig. 1b is a CLLC circuit topology, fig. 1c is a Boost LLC circuit topology, in a high voltage direct current converter (DCDC), a phase-shifted full-bridge rectifier circuit is generally used, and a circuit is shown in fig. 2. these circuits generally require one or more transformers T and one or more inductors L, the magnetic part structures of the transformers and the inductors are shown in fig. 3, the magnetic part generally includes a magnetic core 100, windings and a framework, the transformers T perform the functions of energy transfer and mutual isolation between a primary side and a secondary side, and the inductors L perform the functions of energy storage and/or filtering out output current ripples, the magnetic core of a power transformer and a power inductor is ferrite, the winding is usually a multi-strand twisted wire or a three-layer insulated wire, the winding is usually wound on a framework of a plastic part, and the framework plays roles of supporting, insulating, conveniently manufacturing and the like. The thermal conductivity of ferrite is generally about 10W/(m K), and the winding is copper, but due to the insulating layers between the stranded wire strands and the insulating sheath outside the three layers of insulating wires, the thermal conductivity of the winding is much lower than that of pure copper, and the thermal conductivity of the framework is only about 0.3W/(m K), and the framework is a poor thermal conductor. Power magnetic parts in automotive electronics are often sealed in a case by pouring heat-conducting glue, which makes heat dissipation of the magnetic parts very difficult.

With the increasing demand of the market for the power density of automobile electronics, the heat dissipation of the magnetic part becomes a prominent problem, and in a certain sense, even the heat dissipation problem of the automobile electronic magnetic element is the most critical problem of the automobile electronics. Although power magnetic parts in automotive electronics are often sealed in a case by filling heat-conducting glue, the heat dissipation of the magnetic parts is often difficult due to the substance composition of the transformer and the inductor, and a special heat dissipation means needs to be provided to enhance the heat dissipation capability of the magnetic parts.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a magnetism spare to solve the poor problem of current magnetism spare heat dissipation ability.

In order to solve the technical problem, the utility model provides a magnetic member, a serial communication port, include:

a magnetic core comprising a winding segment; a coil disposed around the winding segment; and the heat dissipation unit comprises a heat conduction section and a heat dissipation section, the heat dissipation unit is arranged at the position of the magnetic field zero position of the coil and is not closed, the heat conduction section is in contact with the magnetic core, and the heat dissipation section is connected with the heat conduction section and/or the coil and used for dissipating heat.

Optionally, the magnetic core has no air gap, and the heat conducting section is arranged along the arrangement direction of the winding section.

Optionally, the heat conducting section is disposed in a gap between the winding section and the coil, and the heat dissipating section extends out of the gap between the winding section and the coil.

Optionally, the magnetic core further includes a magnetic conduction section disposed in the same direction as the winding section and a communication section disposed at an angle to the magnetic conduction section, the magnetic conduction section is disposed outside the coil, the magnetic conduction section is connected to the winding section through the communication section, the heat conduction section is disposed in a gap between the magnetic conduction section and the coil, and the heat dissipation section extends out of the gap between the magnetic conduction section and the coil.

Optionally, the magnetic core has no air gap, the magnetic core includes more than two sub magnetic cores, and the heat conducting section is clamped between two adjacent sub magnetic cores.

Optionally, the magnetic core further includes a magnetic conduction section disposed in the same direction as the winding section and a communication section disposed at an angle to the magnetic conduction section, the magnetic conduction section is disposed outside the coil, the magnetic conduction section is connected to the winding section through the communication section, the heat dissipation unit is wrapped around the coil and outside the magnetic core, and the heat conduction section is in contact with the magnetic conduction section.

Optionally, the magnetic core further includes a magnetic conduction section disposed in the same direction as the winding section and a communication section disposed at an angle to the magnetic conduction section, the magnetic conduction section is disposed outside the coil, the magnetic conduction section is connected to the winding section through the communication section, and the heat conduction section is wrapped outside the magnetic conduction section and contacts with the magnetic conduction section.

Optionally, the heat conducting section is fixedly arranged on the magnetic core and/or the coil.

Optionally, the relative magnetic permeability of the heat dissipation unit is 1.

Optionally, the thickness of the heat dissipation unit is between 0.1mm and 0.5 mm.

To sum up, in the utility model provides an in the magnetism spare, magnetism spare includes: the magnetic part comprises a winding section; the coil is arranged around the winding section; and the heat dissipation unit comprises a heat conduction section and a heat dissipation section, the heat dissipation unit is arranged at the position of the zero position of the magnetic field of the coil and is not closed, the heat conduction section is in contact with the magnetic core and/or the coil, and the heat dissipation section is connected with the heat conduction section for heat dissipation. The utility model discloses a set up the heat dissipation unit, set up the heat conduction section of heat dissipation unit in the position of magnetic field zero-bit, reduce because of the loss that induced-current leads to with generate heat, thereby the heat dissipation section is gone out the heat transfer and is dispelled the heat, has improved the heat-sinking capability of magnetic part greatly, has solved the poor problem of current magnetic part heat dissipation ability to the help improves the power density of magnetic part, further reduce cost.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

fig. 1 is a circuit topology.

Fig. 2 is a diagram of a phase-shifted full-bridge rectifier circuit.

Fig. 3 is a schematic view of a magnetic member.

Fig. 4 is a schematic view of a magnetic member according to an embodiment of the present invention.

Fig. 5 is a schematic view of another magnetic member according to an embodiment of the present invention.

Fig. 6 is a schematic view of a heat dissipation unit according to an embodiment of the present invention.

Fig. 7 is a schematic view of a magnetic member according to a second embodiment of the present invention.

Fig. 8 is a schematic view of a magnetic member according to a third embodiment of the present invention.

Fig. 9 is a schematic view of another magnetic member for mounting a heat dissipation unit according to a third embodiment of the present invention.

In the drawings:

100-magnetic core, 110-winding section, 120-magnetic conduction section, 130-communication section, 200-coil, 300-heat dissipation unit, 310-heat conduction section, 320-heat dissipation section and 400-winding space.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. The term "null of the magnetic field" denotes a position where the magnetic field is zero or close to zero.

The utility model discloses a core thought lies in providing a magnetism spare, sets up the heat dissipation unit through the position that is zero in magnetic field to greatly increased magnetism spare's radiating efficiency, and then improve the heat dissipation power of magnetism spare, reduce cost.

The utility model provides an among the magnetism spare, magnetism spare includes: the magnetic part comprises a winding section; the coil is arranged around the winding section; and the heat dissipation unit comprises a heat conduction section and a heat dissipation section, the heat dissipation unit is arranged at the position of the zero position of the magnetic field of the coil and is not closed, the heat conduction section is in contact with the magnetic core and/or the coil, and the heat dissipation section is connected with the heat conduction section for heat dissipation. The utility model discloses a set up the heat dissipation unit, set up the heat conduction section of heat dissipation unit in the position of magnetic field zero-bit, thereby the heat dissipation section is gone out the heat transfer and is dispelled the heat, has improved the heat-sinking capability of magnetic part greatly, has solved the poor problem of current magnetic part heat dissipation capacity to the help improves the power density of magnetic part, further reduce cost.

The following description refers to the accompanying drawings.

[ EXAMPLES one ]

Please refer to fig. 4 to fig. 6, wherein fig. 4 is a schematic diagram of a magnetic member according to an embodiment of the present invention. Fig. 5 is a schematic view of another magnetic member according to an embodiment of the present invention. Fig. 6 is a schematic view of a heat dissipation unit according to an embodiment of the present invention.

As shown in fig. 4, the first embodiment provides a magnetic member, including: a magnetic core 100, a coil 200 and a heat dissipating unit 300, wherein the magnetic core 100 comprises a winding segment 110, and the winding segment 110 represents a part wound by the coil 200 according to actual design requirements; the coil 200 is disposed around the winding section 110; the heat dissipation unit 300 includes a heat conduction section 310 and a heat dissipation section 320, the heat dissipation unit 300 is disposed at a zero position of the magnetic field of the coil 200 and is not closed, specifically, the non-closing indicates that the heat dissipation unit 300 cannot form a current loop to affect the magnetic field and the electric field of the magnetic member, so that the heat dissipation unit 300 is only heat conductive and heat dissipation, and does not induce current due to closing, thereby generating no or little extra loss. The heat conduction section 310 with the magnetic core 100 contacts, perhaps, the heat conduction section 310 with the coil 200 contacts, perhaps, the heat conduction section 310 with the magnetic core 100 with the coil 200 contacts, the heat dissipation section 320 with the heat conduction section 310 is connected for the heat dissipation, and is specific, the heat conduction section 310 will the magnetic core 100 and/or the heat transfer of coil 200 is to the heat conduction section 310, the heat conduction section 310 and then with heat transfer extremely the heat dissipation section 320 distributes away the heat.

In the magnetic member provided by this embodiment, by providing the heat dissipation unit 300 including the heat conduction section 310 and the heat dissipation section 320, the heat dissipation unit 300 that is not closed is disposed at the zero position of the magnetic field of the coil 200, and the heat of the magnetic core 100 and/or the coil 200 is transferred out through the heat dissipation unit 300, so that the heat dissipation capability of the magnetic member is greatly improved, and the problem of poor heat dissipation capability of the existing magnetic member is solved.

Preferably, the magnetic core 100 has no air gap, and the heat conducting section 310 is disposed along the disposition direction of the winding section 110, and more preferably, the heat conducting section 310 is disposed in the gap between the winding section 110 and the coil 200, and the heat dissipating section (not shown in fig. 4) extends out of the gap between the winding section 110 and the coil 200, so that the heat dissipating section is exposed in the air to dissipate heat, and the heat dissipating section does not affect the magnetic field of the magnetic core or the coil. Wherein the no air gap means an air gap having no air space in a direction parallel to the magnetic induction direction without affecting the magnetic flux.

Preferably, as shown in fig. 4, the magnetic core 100 further includes a magnetic conductive section 120 disposed in the same direction as the winding section 110 and a communication section 130 disposed at an angle to the magnetic conductive section 120, so that the magnetic core includes the winding section 110, the magnetic conductive section 120 and the communication section 130, the magnetic conductive section 120 is disposed outside the coil 200, and the magnetic conductive section 120 is connected to the winding section 110 through the communication section 130. In the magnetic member of the first embodiment, the magnetic member includes a first winding section 110 and two magnetic conductive sections 120, two ends of the first winding section 110 are respectively communicated with the two magnetic conductive sections 120 through a communicating section 130, and two ends of each magnetic conductive section 120 are communicated with the same winding section 110 through a communicating section. Preferably, the communicating section 130 is a straight line, and the communicating section 130 is connected to the winding section 110 and the magnetic conducting section 120 by an included angle of 90 °. Of course, in other embodiments, the shape of the communicating section 120 may be a curved shape, for example, the magnetic conducting section 120 is communicated with the winding section 110 through two semicircular ends, and the connecting condition may be changed according to actual requirements, as long as the magnetic conducting section 120 is communicated with the winding section 110, and the connecting angle and the shape are not limited. At this time, the heat conducting section 310 is disposed in the gap between the magnetic conducting section 120 and the coil 200, that is, the heat conducting section 310 is located outside the coil and inside the magnetic conducting section 120 (as shown in fig. 4, the heat conducting section at the leftmost side and the rightmost side), and the heat dissipating section 320 extends out of the gap between the magnetic conducting section 120 and the coil 200.

As shown in fig. 5, in the first embodiment, another magnetic member is provided, the magnetic core 100 has no air gap, the magnetic member includes two winding segments 110, and two ends of the two winding segments 110 are connected by two communication segments 130 to form a closed magnetic core. Preferably, the heat conducting section 310 is disposed in a gap between each of the winding sections 110 and the coil 200, and the heat dissipating section extends out of the gap between the winding sections 110 and the coil 200. As can be seen, the thermally conductive segment 310 needs to be disposed around each winding segment 110. When the thermally conductive section 310 is disposed around each winding section 110, there may be a variety of situations where one or more thermally conductive sections may be disposed. When one thermally conductive segment 310 is provided, the thermally conductive segment 310 is disposed around the winding segment 110 and the thermally conductive segment 310 remains unclosed. When multiple thermally conductive segments 310 are provided, the multiple thermally conductive segments 310 are placed around each winding segment 110 in a discontinuous manner with a certain spacing, ensuring that the multiple thermally conductive segments 110 do not close.

In the prior art, the transformer further comprises a framework and a plurality of strands, the magnetic element of the transformer is located in a casing of the transformer, in the prior art, a heat dissipation glue is poured into the casing to help the magnetic element dissipate heat, but due to the existence of the framework and the coil 200, the heat dissipation of the part of the magnetic core 100 covered by the coil 200 is difficult. The magnetic element in this embodiment is embodied as a transformer, which is often used in Boost LC or phase-shifted full-bridge circuits. Since the magnetic core 100 has no air gap, that is, the magnetic core 100 is not affected by the air gap, the arrangement direction of the winding segments 110 is parallel to the magnetic flux direction, and the arrangement direction of the winding segments 110 refers to a region that surrounds the winding segments 110 by one turn, where the magnetic field strength H is zero. When the coil 200 is disposed around the winding segment 110, the gap between the winding segment 110 and the coil 200 is parallel to the magnetic flux direction, and the heat conducting segment 310 is disposed in the gap between the winding segment 110 and the coil 200, in which case the heat conducting segment 310 and the magnetic field do not affect each other. Preferably, the heat dissipation unit has a relative magnetic permeability of 1, and specifically, the material of the heat conduction section 310 is metal copper or aluminum with good heat conduction, and as can be seen from formulas 1 and 2 (as described below), the heat conduction section 310 is disposed in the gap between the winding section 110 and the coil 200, where the copper loss of no current at the heat conduction section 310 is 0. In order to allow the heat conducting section 310 to dissipate heat, the heat dissipating section (not shown in fig. 4) is extended out of the gap between the winding section 110 and the coil 200. Since the thermal conductivity of metal is often greater than 100W/(m × K) and even as high as 300W/(m × K), which is much greater than the thermal conductivity of the bobbin, the core 100 and the coil 200, the inserted heat dissipation unit 300 can greatly enhance the thermal conductivity of the magnetic member without generating any additional loss. Preferably, the heat conducting section 310 is fixedly disposed on the magnetic core 100, or the heat conducting section 310 is fixedly disposed on the coil 200, or the heat conducting section 310 is fixedly disposed on the magnetic core 100 and the coil 200. Preferably, the heat conducting section 310 is bonded to the magnetic core 100 and the coil 200 by an insulating adhesive, and the heat conducting section 310 is bonded to the magnetic core 100 or the coil 200 by an insulating adhesive. More preferably, the insulating paste used in this embodiment is a thermally conductive paste. More preferably, the thickness of the heat dissipation unit is between 0.1mm and 0.5 mm.

Formula 1

Formula 2

The loss of the metal was calculated according to the 1D DOWELL model, as shown in fig. 6, where the length of the metal extends perpendicular to the plane of the paper, D is the thickness of the metal, w is the width of the copper sheet, and the magnetic fields on both sides of the metal are H1 and H2, respectively. Formula 1 is the loss length of copper per unit length due to the skin effect, formula 2 is the loss per unit degree due to the proximity effect, where σ refers to the conductivity of the metal; delta is the skin depth, there are

Wherein f is frequency and mu is conductor magnetic permeability; v is d/delta. The copper loss of the heat dissipating unit 300 can be calculated by the above equations 1 and 2, and thus the copper loss can be theoretically calculatedThe situation was analyzed.

[ example two ]

Referring to fig. 7, fig. 7 is a schematic view of a magnetic member according to a second embodiment of the present invention. Fig. 7a is a schematic view of a magnetic member comprising two sub-cores. Fig. 7b is a schematic view of a magnetic core including two sub-magnetic cores and a heat dissipation unit added thereto.

The same portions of the magnetic member in the second embodiment as those in the first embodiment will not be described again, and only different points will be described below.

As shown in fig. 7 (for clarity, the windings are not shown), in the second embodiment, the magnetic core 100 has no air gap, the magnetic core 100 includes more than two sub-magnetic cores, and the heat conducting segment 310 is sandwiched between two adjacent sub-magnetic cores. The magnetic element 100 is a transformer, often used in Boost LC or phase-shifted full bridge circuits. In the existing transformer, the magnetic core 100 is wrapped by the winding and the framework, so that the magnetic core 100 is difficult to contact with heat dissipation glue, and the heat dissipation of the magnetic core 100 is difficult. The core 100 has no air gap, so the core 100 can be divided along the magnetic flux direction to form sub-cores, the magnetic field H is short-circuited by the core, the magnetic field at the joint of the core 100 is zero, the heat dissipation unit 300 is inserted at the joint of the core 100 and extends the heat dissipation unit 300 outwards, and the relative permeability of the heat dissipation unit 300 is 1, so no loss is caused, and the heat dissipation capability of the core 100 is enhanced to a great extent. The heat dissipating unit 300 is a metal having good thermal conductivity, such as copper or aluminum.

The sub-magnetic core includes a winding space 400, and the winding space 400 is a space for placing a winding. When the heat conducting section 310 is sandwiched between two adjacent sub-magnetic cores, the heat conducting section is disposed on the magnetic core 100 while avoiding the winding space 400. Preferably, the magnetic core 100 includes two sub-magnetic cores, and the heat conducting section 310 is sandwiched between the two sub-magnetic cores and disposed to avoid the winding space 400. The heat dissipation section 320 extends out of the two adjacent sub-cores to dissipate heat. Here, the two sub-cores are arranged in parallel in the direction perpendicular to the arrangement direction of the winding segments 110, but in other embodiments, since the magnetic field at the joint of the magnetic core 100 is zero, as long as the two sub-cores can be jointed to each other and the heat conducting segment 310 can be inserted at the joint to form one magnetic core 100. Of course, the number of the sub-cores is not limited to two, and a plurality of sub-cores may be spliced to each other, and the heat conducting section 310 may be introduced at the splicing process, and thus, a plurality of heat conducting sections 310 may be provided. Preferably, the heat conducting section 310 is fixedly disposed on the magnetic core. Preferably, the heat conducting section 310 is bonded to the magnetic core 100 by an insulating adhesive.

[ EXAMPLE III ]

Referring to fig. 8 to 9, fig. 8 is a schematic view of a magnetic member according to a third embodiment of the present invention. Fig. 9 is a schematic view of another magnetic member for mounting a heat dissipation unit according to a third embodiment of the present invention.

The same parts of the magnetic member in the third embodiment as those in the first embodiment will not be described again, and only different points will be described below.

As shown in fig. 8, in a magnetic member provided in the third embodiment, the magnetic core 100 further includes a magnetic conduction section 120 disposed in the same direction as the winding section 110 and a communication section 130 disposed at an angle to the magnetic conduction section 120, the magnetic conduction section 120 is disposed outside the coil 200, the magnetic conduction section 120 is connected to the winding section 110 through the communication section 130, the heat dissipation unit 300 is wrapped outside the coil 200 and the magnetic core 100, and the heat conduction section 310 is in contact with the magnetic conduction section 120. The heat dissipation unit 300 is disposed around the coil 200 and the exterior of the magnetic conductive segment 120, so as to ensure that the heat dissipation unit 300 is not closed.

The winding leg of the magnetic element in this embodiment has an air gap, and the magnetic element may be an LLC, CLLC transformer or inductor. A heat dissipation unit 300 with good heat conduction is attached to the outside of the coil 200 and the magnetic core 100, the heat dissipation unit 300 is made of copper or aluminum, and the relative magnetic permeability ur of the heat dissipation unit 300 is 1. Meanwhile, the heat dissipating section 320 extending outward from the heat dissipating unit 300 may be further configured to dissipate heat, such as near a cold plate or a heat sink such as a fan, so as to quickly conduct away the heat. At this time, although the winding post has an air gap, the air gap is already covered by the winding, the magnetic field intensity cannot be cut to the heat conducting section 310 on the surface, and the magnetic field H near the heat conducting section 310 is also 0, so that no additional loss is generated. The magnetic member is more suitable for use on a magnetic member that is not encapsulated in a case with a heat-dissipating adhesive.

As shown in fig. 9, the magnetic core 100 further includes a magnetic conduction section 120 disposed in the same direction as the winding section 110 and a communication section 130 disposed at an angle to the magnetic conduction section 120, the magnetic conduction section 120 is disposed outside the coil 200, the magnetic conduction section 120 is connected to the winding section 110 through the communication section 130, and the heat conduction section 310 is wrapped outside the magnetic conduction section 120 and contacts with the magnetic conduction section 120. The heat conducting section 310 is disposed around the magnetic conducting section 120 and the winding section 110, so as to ensure that the heat dissipating unit 300 is not closed. The magnetic member 100 has or does not have an air gap on the winding leg around which the winding is wound. Although most of the magnetic member 100 is encapsulated in the thermal conductive paste, a part of the magnetic core does not contact the thermal conductive paste, and thus the heat dissipation unit 300 is disposed outside the magnetic core 100 to uniformly heat the magnetic core 100.

In the process of practical use, the heat dissipation unit 300 may be disposed outside the coil 200 and the magnetic core 100 and outside the magnetic conductive segment 120 and the winding segment 110, or may be disposed according to practical options.

Of course, in the first to third embodiments, the heat dissipation units 300 may be arranged in a combination manner, for example, the heat dissipation units 300 are arranged in the gap between the winding segment 110 and the coil 200, and the heat dissipation units 300 are also arranged outside the magnetic conduction segment 120 and the winding segment 110, so as to increase the speed and efficiency of heat dissipation. For another example, the magnetic core 100 is divided into two or more sub-magnetic cores, the heat dissipation unit 300 is disposed at the joint of the sub-magnetic cores, and the heat dissipation unit 300 is disposed in the gap between the winding segment 110 and the coil 200, or the heat dissipation unit 300 is disposed in the gap between the magnetic conductive segment 120 and the coil 200, and then the heat dissipation unit 300 is disposed outside the coil 200 and the magnetic core 100. In a word, in the setting process of the heat dissipation unit 300, the setting modes of the heat dissipation unit 300 according to the three embodiments can be combined with each other according to actual conditions and actual needs, so as to achieve the purposes of jointly dissipating heat and increasing heat dissipation efficiency. Furthermore, the utility model discloses suitable circuit is not limited to the circuit topology that the aforesaid mentioned, as long as can use the utility model discloses a circuit topology that technical scheme set up is all in protection scope.

To sum up, in the utility model provides an in the magnetism spare, magnetism spare includes: the magnetic part comprises a winding section; the coil is arranged around the winding section; and the heat dissipation unit comprises a heat conduction section and a heat dissipation section, the heat dissipation unit is arranged at the position of the zero position of the magnetic field of the coil and is not closed, the heat conduction section is in contact with the magnetic core and/or the coil, and the heat dissipation section is connected with the heat conduction section for heat dissipation. The utility model discloses a set up the heat dissipation unit, set up the heat conduction section of heat dissipation unit in the position of magnetic field zero-bit, thereby the heat dissipation section is gone out the heat transfer and is dispelled the heat, has improved the heat-sinking capability of magnetic part greatly, has solved the poor problem of current magnetic part heat dissipation capacity to the help improves the power density of magnetic part, further reduce cost.

It should be noted that each embodiment in the present specification focuses on the difference from other embodiments, and the same and similar parts between the embodiments may be referred to each other, and in addition, different parts between the embodiments may also be used in combination with each other, which is not limited by the present invention.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims (10)

1. A magnetic member, comprising:

a magnetic core comprising a winding segment;

a coil disposed around the winding segment; and

the heat dissipation unit comprises a heat conduction section and a heat dissipation section, the heat dissipation unit is arranged at the position of the zero position of the magnetic field of the coil and is not closed, the heat conduction section is in contact with the magnetic core and/or the coil, and the heat dissipation section is connected with the heat conduction section and used for dissipating heat.

2. The magnetic member according to claim 1, wherein the magnetic core has no air gap, and the heat conducting section is disposed along a direction in which the winding section is disposed.

3. The magnetic member of claim 2, wherein the heat conducting section is disposed in a gap between the winding section and the coil, and the heat dissipating section extends out of the gap between the winding section and the coil.

4. The magnetic member as claimed in claim 2, wherein the magnetic core further comprises a magnetic conductive section disposed in the same direction as the winding section and a communication section disposed at an angle to the magnetic conductive section, the magnetic conductive section is disposed outside the coil, the magnetic conductive section is connected to the winding section through the communication section, the heat conductive section is disposed in a gap between the magnetic conductive section and the coil, and the heat dissipation section extends out of the gap between the magnetic conductive section and the coil.

5. The magnetic member according to claim 1, wherein the magnetic core has no air gap, the magnetic core includes more than two sub-magnetic cores, and the heat conducting section is sandwiched between two adjacent sub-magnetic cores.

6. The magnetic member as claimed in claim 1, wherein the magnetic core further includes a magnetic conductive section disposed in the same direction as the winding section and a communication section disposed at an angle to the magnetic conductive section, the magnetic conductive section is disposed outside the coil, the magnetic conductive section is connected to the winding section through the communication section, the heat dissipating unit is wrapped outside the coil and the magnetic core, and the heat conductive section is in contact with the magnetic conductive section.

7. The magnetic member as claimed in claim 1, wherein the magnetic core further comprises a magnetic conductive section disposed in the same direction as the winding section and a communication section disposed at an angle to the magnetic conductive section, the magnetic conductive section is disposed outside the coil, the magnetic conductive section is connected to the winding section through the communication section, and the heat conductive section is wrapped outside the magnetic conductive section and contacts with the magnetic conductive section.

8. The magnetic element according to claim 1, characterized in that the heat conducting section is fixedly arranged on the magnetic core and/or the coil.

9. The magnetic member according to claim 1, wherein the heat radiating unit has a relative magnetic permeability of 1.

10. The magnetic member according to claim 1, wherein the thickness of the heat dissipating unit is between 0.1mm and 0.5 mm.

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