JP2003318034A - Heat radiator and magnetic-field generating device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat radiator that can effectively radiate the heat generated without causing self-heat-generation due to an eddy current loss even in a high-frequency magnetic field, and to provide a magnetic-field generating device using the radiator. <P>SOLUTION: The radiator is provided with a thermal conduction section 2 composed of a plurality of conductive wires 1 electrically insulated from each other and a heat radiating section 3. High heat radiating ability is obtained by disposing the thermal conduction section 2 closely to a heat generating spot so that the heat generated from the spot may be carried efficiently to the heat radiating section 3 and may be radiated from the section 3. Because of this heat radiating constitution, the magnetic field generating device that can suppress temperature rises and can maintain a good magnetic characteristic can be obtained. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator and a magnetic field generator using the same, and more particularly to a radiator and a high frequency magnetic field generator used for electronic parts used in a high frequency magnetic field.

[0002]

2. Description of the Related Art Conventionally, a radiator using a metal structure such as aluminum is well known as a radiator for electronic parts. However, since many radiators have a shape as a metal structure, they have high conductivity and may generate self-heating due to the generation of eddy currents in a high frequency magnetic field.

On the other hand, as a radiator used in a high frequency magnetic field, an example of a heat sink of a deflection yoke is disclosed in Japanese Patent Publication No.
No. 82818. Japanese Patent Examination 7-82818
The heat sink disclosed in the publication uses a ceramic heat sink having good thermal conductivity to radiate heat without causing self-heating due to eddy current loss.

[0004]

Generally, the causes of heat generation in a magnetic field generator driven at high frequency include core loss of a magnetic core and copper loss of a coil winding. Further, when power is supplied to the secondary load by using magnetic field coupling like an induction heating device, heat is generated in the secondary load that returns to the primary magnetic field generator.

The ceramic heat sinks and the like shown in the prior art are intended to radiate core loss and copper loss, and ceramics have a lower thermal conductivity than metals, so that such secondary load Is less effective against the heat caused by the return of. Further, since ceramics have poor workability as compared with metals, it is difficult to form a complicated shape, and there may be a problem in adhesiveness with a heating element. Conversely, non-magnetic metal structures such as copper and aluminum have high thermal conductivity,
The conductivity is also high, and when it is simply used as a radiator, self-heating is caused by eddy current loss, and the heat radiation effect cannot be sufficiently obtained in a high frequency magnetic field.

According to the present invention, even if a conductive material such as metal is used, self-heating due to eddy current loss excited by a high frequency magnetic field can be suppressed, and adhesion to a heat radiation object having a complicated shape can be improved to improve heat radiation. It is intended to provide a radiator with excellent performance. It is another object of the present invention to provide a magnetic field generation device that has high heat dissipation performance even when driven at high frequencies and can suppress temperature rise, thereby maintaining good magnetic characteristics.

[0007]

In order to solve the above-mentioned problems, the heat radiator of the present invention is a heat conducting part comprising a plurality of conductive wires, and the plurality of conductive wires connected to the heat conducting parts. And a heat radiating section consisting of the heat radiating section. According to the present invention, a radiator having high heat dissipation performance can be obtained. The heat conductivity can be improved by using, as the heat conduction part, a heat conduction part in which a plurality of conductive wires are densely packed. Further, the heat radiator of the present invention may include a heat conducting portion including a plurality of first conductive wires and a heat releasing portion including a plurality of second conductive wires connected to the heat conducting portion. good. Since the plurality of conductive wires are electrically insulated from each other, the eddy current loss can be made extremely small even if the radiator is made of a conductive material.

On the other hand, the magnetic field generator of the present invention comprises the above-mentioned radiator of the present invention, and has a coil for supplying a drive current and a magnetic core excited by the coil.
A heat conducting section made of a plurality of conductive wires is arranged near the high temperature section, and a heat radiating section made of the plurality of conductive wires connected to the heat conducting section is provided. This makes it possible to provide a magnetic field generating device that can arrange a heat conducting portion that enables good heat transport close to the heat generating portion, has a low temperature rise due to heat generation, and can maintain good magnetic characteristics. Further, the magnetic field generator of the present invention has a coil for passing a drive current and a magnetic core excited by the coil, and a heat conducting portion made of a plurality of first conductive wires is arranged in the vicinity of a high temperature portion. The same is true even if a heat radiating portion including a plurality of second conductive wires connected to the heat conducting portion is provided.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is a heat conducting part at least a part of which is formed by using a plurality of conductive wires, and a plurality of conductive parts connected to the heat conducting part. This is a radiator provided with a heat dissipation part composed of wires.Since conductive wires have a high thermal conductivity, a plurality of heat conductive parts are used to form a heat transfer part with excellent heat transfer properties for heat transfer. In addition, since the conductive wire can have a large surface area in terms of shape, it is possible to form a heat radiating portion having high heat radiating ability. Since the number is small, it has an effect that a high heat radiation effect can be obtained as a radiator.

According to a second aspect of the present invention, the plurality of conductive wires are Litz wires.
The heat dissipation device according to claim 1, wherein a litz wire composed of a plurality of thin wires can be used to effectively reduce eddy current loss in terms of shape, resulting in a high heat dissipation effect. Have.

The invention according to claim 3 of the present invention is the radiator according to claims 1 and 2, wherein a plurality of conductive wires electrically insulated from each other are used as the plurality of conductive wires. Since the eddy current loss can be effectively reduced, it has an effect of obtaining a high heat dissipation effect.

According to a fourth aspect of the present invention, a plurality of conductive wires are partially insulated from each other and have a mutual contact, and the mutual contact also electrically forms an open loop. The heat sink according to claim 1 or 2, wherein the conductive wires are electrically insulated from each other, and even if they partially contact each other, they should be electrically open loop. For example, since self-heating due to eddy current can be suppressed, it has an effect of obtaining a high heat dissipation effect.

The invention according to claim 5 of the present invention is the radiator according to claim 1, characterized in that the heat conducting portion is constituted by a plurality of conductive wires densely packed together. Since the conductive wires are densely arranged to form a heat conducting portion excellent in heat transport, and thereby the heat conducting portion can be brought into close contact with a small heat generating portion, a high heat dissipation effect can be obtained.

The invention according to claim 6 of the present invention is the radiator according to claim 5, in which a plurality of conductive wires constituting the heat conducting portion are adhered to each other. Since the heat conductivity is improved and stable heat transport is achieved by the interaction of the respective conductive wires in (3), a high heat dissipation effect is obtained.

The invention according to claim 7 of the present invention is the radiator according to claim 5 and 6, wherein a plurality of conductive wires constituting the heat dissipation portion are separated from each other through a space. It is said that by separating a plurality of conductive wires from each other through a space, the heat exchange surface area of the heat radiating portion can be increased, and heat can be effectively radiated to the space, so that a high heat radiating effect can be obtained. Have an effect.

The invention according to claim 8 of the present invention is characterized in that the heat conducting portion and the heat radiating portion are constituted by separate members, and the heat conducting member and the heat radiating portion are joined together. Since the heat conducting section and the heat radiating section can be optimally configured, the heat radiating effect can be obtained.

According to a ninth aspect of the present invention, the plurality of first conductive wires are electrically insulated from each other, and the plurality of second conductive wires are mutually isolated. The radiator according to claim 8 is electrically insulated, and since self-heating due to eddy current loss is extremely suppressed, a high heat radiation effect can be obtained.

The invention according to claim 10 of the present invention is the first
10. The heat dissipation device according to claim 8 or 9, wherein a conductive wire made of a litz wire is used for both or one of the conductive wire and the second conductive wire, and self-heating due to eddy current loss. Has an effect that a high heat dissipation effect can be obtained.

According to an eleventh aspect of the present invention, the electrical connection between the plurality of first conductive wires and the electrical connection between the plurality of second conductive wires form an open loop. The heat sink according to claim 8 characterized in that even if an electrical connection is made to each conductive wire, an open loop is formed, which causes an eddy current loss in a high frequency magnetic field. Because self-heating can be suppressed,
It has the effect of obtaining a high heat dissipation effect.

The invention according to claim 12 of the present invention is the first
12. The radiator according to claim 8, wherein a connection portion having good thermal conductivity is provided between the conductive wire and the second conductive wire. When each is optimally configured, heat is transferred from the heat conducting portion to the heat radiating portion without being hindered, so that a high heat radiating effect can be obtained.

According to a thirteenth aspect of the present invention, there is provided a radiator according to the eighth aspect, in which a plurality of first conductive wires forming the heat conducting portion are closely packed with each other. Thus, the first conductive wires are densely packed to form a heat conducting portion excellent in heat transport, and the conducting portion can be brought into close contact with a small heat generating portion, so that a high heat dissipation effect can be obtained.

According to a fourteenth aspect of the present invention, there is provided the radiator according to the eighth aspect, wherein a plurality of first conductive wires constituting the heat conducting portion are adhered to each other. Yes, the interaction of the first conductive wire in the heat conducting part improves the heat conductivity and enables stable heat transport, and the heat conducting part can be brought into close contact with a small heat-generating portion, so that a high heat dissipation effect can be obtained. Have.

According to a fifteenth aspect of the present invention, there is provided a coil for supplying a drive current, a magnetic core excited by the coil, and any one of the radiators according to the first to fourteenth aspects. A magnetic field generating device, wherein
By using any of the radiators from 1 to 15,
Since the heat generated by driving can be effectively dissipated and self-heating of the radiator due to the magnetic field is suppressed, there is an effect that a temperature rise is small and therefore a magnetic field generator capable of maintaining good magnetic characteristics can be obtained. .

According to a sixteenth aspect of the present invention, there is provided a heat conducting portion having a coil for supplying a driving current and a magnetic core excited by the coil, and comprising a plurality of conductive wires near a high temperature portion. Is provided, and the magnetic field generator is provided with a heat radiating portion composed of the plurality of conductive wires connected to the heat conducting portion. Since the self-heating of the conductive wire is small, the temperature rise is small, and therefore, a magnetic field generator capable of maintaining good magnetic characteristics can be obtained.

According to a seventeenth aspect of the present invention, there is provided a coil for passing a drive current, a magnetic core excited by the coil, and a plurality of first conductive wires near a high temperature portion. The magnetic field generator is provided with a heat conducting section and a heat radiating section made up of a plurality of second conductive wires connected to the heat conducting section. In addition to the above, it is possible to obtain a magnetic field generator capable of maintaining good magnetic characteristics because the temperature rise is small because self-heating of each conductive wire is small even in a high frequency magnetic field.

According to an eighteenth aspect of the present invention, a plurality of conductive wires or a plurality of first conductive wires forming the heat conducting portion are densely packed.
The magnetic field generator described in (1) above has an effect of efficiently radiating heat even when the heat generating portion is small, causing a small temperature rise, and thus providing a magnetic field generator capable of maintaining good magnetic characteristics.

The invention according to claim 19 of the present invention is the magnetic field generator according to any one of claims 16 to 18, in which the heat conducting portion composed of a plurality of conductive wires is arranged in the vicinity of the magnetic core. Since the heat in the vicinity of the magnetic core can be effectively radiated, the temperature rise is small even if the core loss is large, and therefore, the magnetic field generator capable of maintaining good magnetic characteristics can be obtained.

The invention according to claim 20 of the present invention is the magnetic field generator according to any one of claims 16 to 18, in which the heat conducting portion composed of a plurality of conductive wires is arranged in the vicinity of the coil. Since the copper loss can be effectively dissipated, the temperature rise is small even if the copper loss is large, and therefore a magnetic field generating circuit capable of maintaining good magnetic characteristics can be obtained.

The invention according to claim 21 of the present invention is the magnetic field generator according to any one of claims 16 to 18, wherein the heat conducting portion is arranged in the vicinity of the heating element in the vicinity of the magnetic core or the coil. Since the heat returned from the secondary side circuit load can be effectively radiated, and the primary side magnetic field generation circuit with a small temperature rise can be obtained especially when a large amount of heat is generated on the secondary side, Therefore, there is an effect that a magnetic field generator capable of maintaining good magnetic characteristics can be obtained. (Embodiment 1) Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to FIGS.

FIG. 1 is a perspective view showing a radiator according to an embodiment of the present invention, in which 1 is a conductive wire, and the conductive wire 1 is a linear body made of at least a conductive metal or the like. It suffices if it is provided, but in the present embodiment, a coating made of an insulating material that covers the surface of the linear body is used. Reference numeral 2 is a heat conducting portion, and 3 is a heat radiating portion. The conductive wire 1 has a metal surface such as a copper wire coated with an insulator, and can be realized by, for example, a polyurethane-coated electric wire or a polyimide-coated electric wire. As the constituent material of the conductive wire 1, Cu, Al, Fe, Au, Ag, N
a single material selected from the metal material group such as i and Ti,
Or alloys composed within the group of metallic materials,
An alloy of a simple substance material or an alloy material selected from the metal material group and an element other than the metal material group is preferably used. It is particularly preferable to use the conductive wire 1 made of Cu or Cu alloy which is a non-magnetic material.

Further, the cross-sectional shape of the conductive wire 1 can be appropriately selected according to the specifications, such as a circular shape, a semicircular shape, an elliptical shape, a rectangular shape, a rectangular shape, and a polygonal shape.

Further, as the insulating material for coating the surface of the conductive wire 1, polyimide amide, polyester imide, polyester or the like can be used.

The diameter of the conductive wire 1 including the coating material is preferably about 0.05 mm to 3 mm, and if it is thinner than 0.05 mm, it cannot have a predetermined elasticity. Or problems such as poor workability occur. Further, if it is larger than 3 mm, it is difficult to perform bending work, and problems such as a problem that the contact area between the heat conducting portion 2 and another member is small are retained.

The radiator shown in FIG. 1 has a structure in which the conductive wires 1 are arranged so as to be turned in an alternating direction, and the conductive wires 1 are densely packed in the heat conducting portion 2. There is. This can be easily performed, for example, by arranging conductive wires such as a polyurethane-coated electric wire in a line and applying a large current to the conductive wire 1 in a short time to melt the coating on the surface of the conductive wire 1 and perform bonding. realizable. Here, the conductive wire 1 is excellent in flexibility and can be formed into various shapes such as a heating element and a high temperature part even if they are densely packed or adhered to each other. It is possible to improve the heat transfer by increasing the adhesiveness to a heat dissipation object having any shape.

In this embodiment, the heat conducting portion 2 is formed by closely adhering the conductive wire 1 to each other. However, a conductive material such as a plate or a linear body or an insulating material is provided between the conductive wires 1. You may sandwich and comprise what was comprised by.

Further, in the present embodiment, the conductive wire 1
Have the same structure (the central part is made of Cu or a Cu alloy, and the coating material is polyurethane), but they may be structured by combining different materials (the central part and the coating material) periodically or aperiodically. good. They are,
It is preferable to appropriately change it according to the specifications.

Further, in the heat radiation portion 3 of FIG. 1, since the adjacent conductive wires 1 do not contact each other, a large heat radiation surface area can be secured. Since the conductive wires 1 such as copper wires are insulated from each other, the eddy current loss is less likely to occur in shape even when used in a high frequency magnetic field, which suppresses self-heating of the conductive wires 1. Further, since each conductive wire 1 is an open loop, heat generation due to an induced current does not occur. When the conductive wires 1 come into contact with each other at a plurality of locations due to the thinning of the coating material and the like, an external magnetic field causes the current flow to form a closed loop, generating an eddy current and causing the heat conducting portion 2 to generate heat. Defect occurs. However, even if the conductive wires 1 come into contact with each other at several places, the contact in which no eddy current is generated, that is, the above-mentioned open loop is acceptable, and even if a very small length closed loop is generated, The heat generated at is so small that it is acceptable.

As described above, it is preferable to take measures so as to prevent the conductive wires 1 from coming into contact with each other as much as possible. As a method for this, the film thickness of the coating material of the conductive wires 1 may be increased or the film thickness may vary. It is possible to suppress the above or select a material.

Therefore, the radiator shown in FIG. 1 can effectively radiate heat, and even if a conductive material such as metal is used, self-heating due to eddy current loss excited by a high frequency magnetic field can be suppressed, and the radiator is complicated. It has excellent adhesiveness even for objects with different shapes and has excellent heat dissipation performance.

FIG. 2 is a perspective view showing a magnetic field generator according to an embodiment of the present invention, which uses the radiator shown in FIG. Here, 4 is a magnetic core, 5 is a bobbin (not shown)
It is a coil wound around. By supplying an alternating current to the coil 5, a magnetic field is generated inside the magnetic core 4. In the magnetic field generator of FIG. 2, the radiator 10 is arranged on the upper surface of the core 4 and effectively radiates the heat mainly generated by the core loss. In recent years, there has been a tendency to increase the frequency of the current to be passed in order to miniaturize the magnetic parts. However, when the frequency is increased in this way, the hysteresis loss of the magnetic core is increased and the heat generation is increased. When the frequency becomes higher, leakage magnetic flux or eddy current loss due to the generated magnetic flux in the case of an open magnetic circuit occurs in the metal placed near the magnetic field generator. Since the heat dissipation structure of the magnetic field generator shown in FIG. 2 uses the radiator 10 which is entirely composed of the conductive wires 1 insulated from each other,
Such eddy current loss is unlikely to occur, and therefore self-heating is suppressed even with a metal heat radiation structure. Further, since the core portion of the conductive wire 1 is made of metal and has good thermal conductivity, a high heat dissipation effect can be obtained in the magnetic field generator of FIG. 2, which can suppress the temperature rise and keep the temperature low. Good magnetic characteristics that are close to each other can be maintained.
Further, since this heat dissipation structure is formed of a thin conductive wire, it is possible to easily process the shape and easily cope with a complicated shape.

Further, in FIG. 2, it is preferable that the portion of the heat conducting portion 2 that contacts the core has a flat structure.
As a means for this, for example, the conductive wire 1 can be realized by forming a semicircular cross section. In this case, if the conductive wire 1 has a circular shape, the contact area between the heat conducting portion 2 and the core 2 may be reduced, and the heat dissipation effect may be reduced. Therefore, in consideration of the surface shape of the member on which the radiator 10 is mounted, it is necessary to appropriately select the cross-sectional shape and the like of the conductive wire 1 forming the heat conducting section 2.

Furthermore, for example, a member having good thermal conductivity such as a sheet of silicon grease or silicon rubber may be interposed between the radiator 10 and the core 4.

(Second Embodiment) FIG. 3 is a perspective view showing a radiator according to another embodiment of the present invention, in which 6 is a conductive wire, and the conductive wire 6 is the same as that shown in FIG. Shape and material. Reference numeral 7 is a heat conducting portion where the conductive wire 6 is converged, and 8 is a heat radiating portion. In FIG. 3, the heat conducting portion 7 is brought into contact with a heat generating portion to transfer heat to the heat radiating portion 8, and the heat radiating portion 8 radiates heat into the air. Since the conductive wires are dense and the shape of the heat conducting portion 7 is small, the heat radiating effect can be enhanced by good heat transport even when the heat generating portion is large and is not exposed on the surface. When used in a magnetic field generator in which the copper loss of the coil poses a problem, effective heat dissipation becomes possible by sandwiching the heat conducting portion 7 between the layers of the coil or between the coil and the bobbin. Also in this case, since the conductive wires 6 are insulated from each other, eddy currents are less likely to be generated, but if the conductive wires 7 are composed of litz wires, eddy current loss can be further reduced and effective heat dissipation can be performed. Becomes

FIG. 4 is a perspective view showing a magnetic field generator according to another embodiment of the present invention, which is an example of the magnetic field generator using the radiator of FIG. Coil 5
By inserting the heat conducting portion 7 between the magnetic core 4 and the magnetic core 4, it is possible to effectively dissipate the heat generated by the copper loss generated in the coil 5, so that the temperature rise can be suppressed and good magnetic characteristics can be obtained. A sustainable magnetic field generator is obtained.

FIG. 5 is a perspective view showing a magnetic field generator according to another embodiment of the present invention. In FIG. 5, 11 is a conductive wire, 12 is surrounded by a dotted line, and 12 is a heat radiating portion, which is also surrounded by a dotted line. 13 is a heat conducting part, 14 is a bobbin (not shown)
A coil wound around the coil, and 15 a magnetic core. By inserting a part of the heat conducting portion 13 between the bobbin and the magnetic core 15, the heat generated in the magnetic core 15 and the coil 14 can be efficiently radiated by the heat radiating portion 12.
Dissipate heat by transporting to. Although 10 conductive wires 11 are used in the present embodiment, the number of conductive wires 11 may be increased or decreased according to the allowable temperature rise value of the device.

Next, an embodiment in which a RITS wire is used for the heat dissipation portion 12 will be described with reference to FIGS. 6 and 7. 6 and 7 are perspective views showing a magnetic field generator according to another embodiment of the present invention.

In FIG. 6, 11 to 15 are the same as the components in FIG. 5, and 16 is a RTZ wire.

In the present embodiment, as shown in FIG.
Heat dissipation part 12 made of TS wire 16 and conductive wire 11
A heat radiator is formed by connecting the heat conducting portion 13 consisting of. The RITS wire 16 is formed by twisting several to about 120 conductive wires together.
Eddy current loss can be effectively reduced. Further, by using the RITS wire 16, a larger heat dissipation surface area can be obtained as compared with the single conductive wire 11, so that more effective heat dissipation becomes possible. Heat dissipation part 12 and heat conduction part 13
The connection is made by adhesion with a resin adhesive material, soldering, or the like. In the case of soldering, eddy current loss occurs at the bonded portion, so it is desirable to minimize the bonded area. Next, the cross-sectional shape of the heat conducting portion 11 will be described with reference to FIG.
FIG. 8 is a sectional view showing a magnetic field generator according to another embodiment of the present invention. In FIG. 8, 17 is a cross section of the conductive wire that constitutes the heat conducting portion, 18 is a cross section of the magnetic core 15, 19 is a cross section of the bobbin, and 20 is a cross section of the coil 14 wound in two layers. There is a space 21 between the bobbin 19 and the magnetic core 18. As shown in FIG. 8, by forming the conductive wire 17 into a crushed shape, the adhesion between the magnetic core 18 and the bobbin 19 is improved, and heat can be efficiently transmitted to the heat dissipation portion 12. The shape of the conductive wire 17 may be a perfect circle, an ellipse, a rectangle, or a shape having no symmetry as long as it can ensure the adhesion to the heat generating portion. Further, if the space 21 is filled with heat-dissipating silicon grease or the like, the heat transfer effect is further improved.

[0049]

As described above, according to claims 1 to 1 of the present invention.
According to the radiator described in 4, even if a conductive material such as a metal is used, self-heating due to eddy current loss excited by a high-frequency magnetic field can be suppressed, and adhesion to a heat dissipation object having a complicated shape can be improved. Thus, an excellent effect of heat dissipation performance can be obtained.

Further, according to the magnetic field generator of the present invention, it is possible to suppress the temperature rise due to the high heat dissipation performance even at the time of high frequency driving, and it is possible to maintain good magnetic characteristics. Can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a radiator according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a magnetic field generator according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a radiator according to another embodiment of the present invention.

FIG. 4 is a perspective view showing a magnetic field generator according to another embodiment of the present invention.

FIG. 5 is a perspective view showing a magnetic field generator according to another embodiment of the present invention.

FIG. 6 is a perspective view showing a magnetic field generator according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a magnetic field generator according to another embodiment of the present invention.

FIG. 8 is a sectional view showing a magnetic field generator according to another embodiment of the present invention.

[Explanation of symbols]

1 Conductive wire 2 Heat conduction part 3 Heat sink 4 magnetic core 5 coils 6 Conductive wire 7 Heat conduction part 8 Heat sink

Claims (21)

[Claims] 1. A heat radiator comprising a heat conducting portion at least a part of which is formed by using a plurality of conductive wires, and a heat radiating portion which is connected to the heat conducting portion and is formed by a plurality of conductive wires. 2. The radiator according to claim 1, wherein a conductive wire made of a litz wire is used as the plurality of conductive wires. 3. A plurality of conductive wires electrically insulated from each other are used as the plurality of conductive wires.
The radiator according to any one of claims 1. 4. The plurality of conductive wires have a mutual mutual contact in a mutually insulated manner, and are electrically open loop by the mutual contact. The radiator according to 1. 5. The radiator according to claim 1, wherein the heat conducting portion is formed by densely packing a plurality of conductive wires. 6. The radiator according to claim 5, wherein a plurality of conductive wires forming the heat conducting portion are adhered to each other. 7. The radiator according to claim 5, wherein the plurality of conductive wires forming the heat radiation portion are separated from each other through a space. 8. The radiator according to claim 1, wherein the heat conducting portion and the heat radiating portion are formed by separate members, and the heat conducting member and the heat radiating portion are joined together. 9. A plurality of first conductive wires are electrically insulated from each other, and a plurality of second conductive wires are electrically insulated from each other. The radiator according to claim 8. 10. The radiator according to claim 8, wherein a conductive wire made of a litz wire is used for both or one of the first conductive wire and the second conductive wire. 11. A plurality of first conductive wires and a plurality of second conductive wires.
The electrically conductive wire of claim 1 has a partial electrical interconnection in an electrically insulated one from the other and is electrically open loop due to said mutual contact. The radiator according to any one of Items 8 to 10. 12. The radiator according to claim 8, wherein a connection portion having good thermal conductivity is provided between the first conductive wire and the second conductive wire. 13. The plurality of first conductive wires forming the heat conducting portion are closely packed with each other.
The radiator described in. 14. The radiator according to claim 8, wherein a plurality of first conductive wires forming the heat conducting portion are adhered to each other. 15. A coil for supplying a drive current, a magnetic core excited by the coil, and
And a heat radiator according to claim 1. 16. A heat conducting section comprising a plurality of conductive wires is provided in the vicinity of a high temperature portion, the heat conducting section having a coil for supplying a driving current and a magnetic core excited by the coil, and connected to the heat conducting section. Magnetic field generator provided with a heat radiating portion made of the plurality of conductive wires. 17. A heat conducting portion having a coil for supplying a driving current and a magnetic core excited by the coil, wherein a heat conducting portion made of a plurality of first conductive wires is arranged in the vicinity of a high temperature portion. Magnetic field generator provided with a heat dissipation part formed of a plurality of second conductive wires connected to the part. 18. The magnetic field generating device according to claim 16, wherein a plurality of conductive wires or a plurality of first conductive wires forming the heat conducting section are densely packed. 19. The magnetic field generating device according to claim 16, wherein the heat conducting portion composed of a plurality of conductive wires is arranged in the vicinity of the magnetic core. 20. The magnetic field generator according to claim 16, wherein the heat conducting portion made of a plurality of conductive wires is arranged near the coil. 21. The magnetic field generator according to claim 16, wherein the heat conducting portion is arranged in the vicinity of a heating element which is in the vicinity of the magnetic core or the coil.