JP2008117746A - Power supply line using high-frequency current - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply line using high-frequency current capable of reducing power loss due to high frequency, and improving productivity. <P>SOLUTION: The conductor of a power supply line 1 using high-frequency current sectionally has spaces 4a, 4b dividing a thickness at least in one direction out of directions vertical to the direction of a magnetic flux generated by the current, constitutes a conductive member comprising a conductor 2 except for the spaces 4a, 4b as a single structure, and arranges an insulator 3 outside the conductive member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a feeder line that allows a high-frequency current to flow.

  When the frequency of the current is increased, a skin effect occurs, and the alternating current tends to flow only near the surface of the conductor. As a result, the conductor resistance increases and the loss increases remarkably. Generally, the skin depth d indicating the degree of the skin effect is expressed as follows.

Skin depth: d = (2 / ωσμ) ^1/2
ω: Frequency σ: Material conductivity μ: Material permeability In other words, at a certain frequency, if the thickness is less than or equal to the skin depth d, loss due to the skin effect can be significantly reduced. Therefore, in the conventional conductor, the loss is reduced by bundling a large number of thin conductors that are insulated from each other and having a skin depth or less.

Moreover, the conductor of the conventional example (for example, patent document 1) shown in FIG. 21 is reducing the loss by laminating | stacking the conductor part 100 and the insulation part 101 of the thickness below the skin depth.
JP-A-5-190026 (FIG. 1, paragraph number 0016)

  However, in the conducting wire as disclosed in Patent Document 1, it is necessary to position the conductor portion 100 during the insulation process (sheath process), and it takes a long processing time. Also, their positioning is difficult.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a high-frequency power supply line that can reduce loss due to high frequency and improve manufacturability. is there.

  In order to achieve the above-described object, according to the first aspect of the present invention, there is provided a high-frequency feeder formed by integrally forming a conductor portion and an insulator, and the conductor portion is a magnetic flux generated by an electric current in a cross-sectional view. A space part that divides the thickness in at least one of the directions perpendicular to the direction of the conductor, and a conductor part other than the space part is formed in a series, and an insulator is disposed at least outside the conductor part. It is characterized by being formed integrally with the insulator.

  According to the invention of claim 1, since the cross section of the conductor portion of the conductor portion is a series, the manufacturability is improved and the loss due to the high frequency can be reduced.

  The invention of claim 2 is characterized in that, in the invention of claim 1, an insulator is arranged outside the space portion and the conductor portion, and the conductor portion is formed integrally with the insulator.

  According to the invention of claim 2, by providing an insulator also in the space portion of the conductor portion, the strength of the conductor portion is increased compared to the case where no insulator is provided in the space portion, and deformation and the like can be prevented. I can plan.

According to a third aspect of the invention, in the first aspect of the invention, an insulator is disposed only on the outside of the conductor portion excluding the space portion, and is formed integrally. By not providing an insulator in the space portion of the conductor portion, it becomes possible to connect the insulator without peeling off the insulator on the outer periphery of the conductor portion at the time of connection, and the construction time can be shortened.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the conductor portion is provided with a space portion that divides the thickness in all directions perpendicular to the direction of the magnetic flux generated by the current. And

  According to the fourth aspect of the present invention, the conductor portion having a small cross section in the vertical direction of the magnetic flux caused by the current is used, and as a result, the loss due to high frequency can be further reduced.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the conductor portion includes a conductive portion formed by a single conductive member.

  According to the invention of claim 5, since the conductor portion can be constituted by one conductive member, the number of processing steps for making a series can be reduced.

  According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, the conductor portion is provided with a flat portion at a part of the conductor portion.

  According to the invention of claim 6, by providing the flat portion in the conductor portion, connection reliability and contact resistance can be reduced even if the conductor portion is C-shaped or annular.

  The invention of claim 7 is characterized in that the flat portion is formed on the outer surface of the conductor portion.

  According to invention of Claim 7, since a flat part is located in the outer surface of a conductor site | part, a coupling | bond part with the connection tool used for connecting feeders can be performed in a flat part. In addition, a connection spring having a U-shaped cross section is used as a connection tool, and the connection spring is pressed against the outer periphery of the power supply line, so that the connection with the flat portion can be performed easily and reliably.

  The invention of claim 8 is characterized in that the flat portions are formed on both outer side surfaces of the conductor portion.

  According to the invention of claim 8, when using the power supply lines, a connection spring having a U-shaped cross section can be pressed against the outer periphery of the conductor portion of each power supply line as a connection tool, and the connection of the power supply lines is simple and reliable. Can be done. In addition, since the feeder line has a symmetrical cross-sectional shape, connection can be made without distinction between the left and right, and workability is improved.

  Since the present invention has a series of cross sections of the conductor portion of the conductor portion, the productivity is improved and the loss due to the high frequency can be reduced.

Embodiments of the present invention will be described below.
(Embodiment 1)
As shown in FIGS. 1A and 1B, the high-frequency power supply line 1 of the present embodiment is integrally connected to the inner cylindrical portion 2a and the inner cylindrical portion 2a over the entire length in the longitudinal direction by the connecting portion 2c. A conductor portion using a double cylindrical conductor 2 composed of a concentric outer cylinder portion 2b as a conductor portion is embedded in an insulator 3 and the insulator 3 is disposed outside the conductor portion; It is set as the structure which does not distribute the insulator 3 in the space parts 4a and 4b of each cylinder part 2a and 2b.

  Here, the conductor 2 is formed by bending, for example, one copper plate material. In other words, the central portion of the copper plate material is bent into a circular cross section to form the inner cylindrical portion 2a, and the two pieces extended downward in the drawing so as to be closely parallel to both ends of the annular portion forming the inner cylindrical portion 2a. The outer cylindrical part 1b having an annular cross-section concentric with the inner cylindrical part 2a is formed by bending the arcuate shape so as to surround the inner cylindrical part 2a from a predetermined position of the plate piece part, butting both ends thereof and welding the abutting part Is forming. And the above-mentioned two plate piece parts which are closely parallel to each other constitute a connecting part 2c for connecting the two cylindrical parts 2a, 2b. Thus, since the conductor 2 used in the present embodiment is formed by bending a single metal plate material, it is possible to reduce the number of processing steps in which conductor portions other than the space portions 4a and 4b are made continuous (connected).

Thus, in the high-frequency feeder 1 of this embodiment, the longitudinal direction of the conductor 2 is the current direction X, and the space portions 4a and 4b divide the thickness in the direction B perpendicular to the direction A of the magnetic flux generated by the current in a cross-sectional view. Will do. As a result, a conductor 2 having a smaller cross section in the vertical direction of the magnetic flux caused by current and having a series of cross sections is used compared to a conductor composed of one circular cross section in the same cross sectional area. When performing the treatment, if the insulation distance is secured in the initial state, the holding step can be omitted thereafter. This eliminates the need for positioning the insulation sheath treatment, shortens the processing time, and reduces the loss peculiar to the high frequency due to the skin effect, proximity effect, etc. 1, the space portions 4a and 4b of both the cylindrical portions 2a and 2b of the conductor 2 are opened, and the openings exposed on the end surfaces are used for high frequency by the connector 5 shown in FIG. The connection part at the time of connecting the feeders 1 and 1 is comprised.

  The connector 5 is provided with recesses 5b having an opening surface that is the same as the cross-sectional shape of the end surface of the high-frequency feeder 1 on both sides of the insulating resin body 5a. The ends of the pair of cross-sectional connection conductors 6 and 6 penetrating the body 5a are exposed, and when connecting the high-frequency feed lines 1 to each other, they are respectively placed in the recesses 5b and 5b on both sides. Insert the end of the high-frequency feed line 1. As a result, the pair of connection conductors 6 and 6 are inserted into the space 4b of the outer cylindrical portion 1b from the end face of the high-frequency feed line 1, and the outer peripheral surfaces of the respective connection conductors 6 are external as shown in FIG. The high frequency power supply lines 1 and 1 are electrically connected to each other through the connection conductors 6 and 6 by elastic contact with the inner peripheral surface of the cylindrical portion 1. Therefore, in the high-frequency power supply line 1 of the present embodiment, it is possible to connect to the connector 5 without peeling off the insulator 3 on the outer periphery of the conductor portion, and the construction time can be shortened.

  In this embodiment, a copper plate material is processed to form a conductor portion using the double cylindrical conductor 2 as a conductor portion. However, the copper material is extruded to form a double cylindrical shape having the same shape. A conductor portion using the conductor 2 as a conductor portion can also be formed. FIG. 3 is a front view of the example seen from the end face direction.

  Further, in the present embodiment, the double cylindrical conductor 2 is used. However, for example, a triple cylindrical conductor may be used and can be appropriately changed, and is not particularly limited to the embodiment.

(Embodiment 2)
The high-frequency feeder 1 according to the first embodiment uses the double cylindrical conductor 2 as the conductor portion of the conductor portion embedded in the insulator 3. In this embodiment, for example, a copper material is extruded and processed. As shown in FIGS. 4A and 4B, the conductor 2 having a series of front cross-sectional shapes formed in a comb shape is used as a conductor portion of the conductor portion. This conductor 2 has a tooth-like space 41 that divides the thickness in at least one direction B among the directions perpendicular to the direction A of the magnetic flux shown in FIG. Among the space portions 41..., The space portions 42 and 44 located on both sides of the central space portion 43 are closed by a ceiling portion integrally formed so as to extend between the tips of the tooth portions on both sides. The space portions 42 and 44 are space portions where the insulator 3 is not disposed when the conductor portion is embedded in the insulating portion 3.

  And the opening part of the space parts 42 and 44 exposed to the end surface of the high frequency electric supply line 1 is the parallel plug blade-shaped connection conductor (not shown) of the connector (not shown) which connects the high frequency electric supply line 1. 1 mutually. Z)) is inserted and constitutes a connection port to be connected.

  Thus, even in the high-frequency power supply line 1 of the present embodiment, when the insulation sheath treatment is performed, if the insulation distance is secured in the initial state, the holding process can be omitted thereafter. Accordingly, there is an advantage that positioning of the insulating sheath process is not required, the processing time can be shortened, and the loss due to the above-described high frequency can be reduced. Furthermore, the structure which can be connected without peeling off the insulator 3 on the outer periphery of the conductor part for connection with the connector as in the first embodiment is possible, and the construction time can be shortened.

(Embodiment 3)
In the present embodiment, as shown in FIG. 5, for example, a copper material is extruded and a conductor 2 having a ladder-like front cross-sectional shape is used as a conductor portion of the conductor portion. Since the openings other than both ends are not open to the outside, the insulator 3 may not be disposed in all the space portions 4 when the conductor portion is embedded in the insulator 3. Also in the case of this embodiment, the opening part of the edge part of the space part 4 comprises a connection port with a connector, and the structure which can be connected without peeling the insulator 3 of a conductor site | part periphery for a connection with a connector is possible Therefore, the construction time can be shortened.

(Embodiment 4)
As shown in FIG. 6 (a), the high-frequency power supply line 1 of the present embodiment has a conductor portion using a conductor 2 having a comb-like front cross-sectional shape as a conductor portion, embedded in an insulator 3, and is longitudinally Is the current direction X.

  Here, the conductor 2 is formed by extruding a copper material in the same manner as in the second embodiment, and this embodiment is also perpendicular to the direction A of the magnetic flux generated by the current in a cross-sectional view as shown in FIG. Of these directions, a space portion 4 that divides the thickness in at least one direction B is provided between the tooth-shaped portions, and the conductor portion is composed of the space portion 4 and a series of conductors 2.

  Thus, in the high-frequency power supply line 1 of the present embodiment, the thickness of the cross section in the vertical direction of the magnetic flux caused by the current is smaller in at least one direction than the conductor formed of one circular cross section in the same cross sectional area. In addition, since the conductor 2 having a series (one continuous) cross section is used, when the insulation sheath treatment is performed, if the insulation distance is secured in the initial state, the holding step can be omitted thereafter. Accordingly, there is an advantage that positioning of the insulating sheath process is not necessary, the processing time can be shortened, and the loss due to the above-described high frequency is also reduced.

  As shown in FIG. 6C, for example, the conductor 2 shown in FIG. 6B can be used even if a conductor 2 having a base portion at an intermediate portion and a plurality of tooth-like portions formed in parallel on the upper and lower surfaces of the base portion is used. The same effect as when using is obtained.

  Further, instead of forming a conductor 2 by extruding a copper material, a conductor 2 having a front cross-sectional shape formed in a comb-teeth shape by bending a single copper plate material may be used, as shown in FIGS. b) shows an example in which this copper plate material is bent.

(Embodiment 5)
As shown in FIG. 8A, the high-frequency power supply line 1 of the present embodiment has a conductor portion made of a conductor 2 whose front shape is a spiral shape embedded in an insulator 3 and a high-frequency current in the longitudinal direction X. Is supposed to flow.

  Here, for example, as shown in FIG. 8B, the conductor portion is formed by winding a copper plate and an insulating sheet superimposed on the copper plate so that the conductor 2 made of a single copper plate material wound in a spiral shape and the magnetic flux generated by the current. It is comprised with the space part 4 which consists of an insulation sheet site | part which divides | segments thickness in all the directions B perpendicular | vertical to the direction A.

  Thus, in the high-frequency feeder 1 of the present embodiment, the thickness of the cross section in the vertical direction of the magnetic flux due to the current is all smaller than that of the conductor formed of one circular cross section in the same cross sectional area, and one. Since the conductor 2 having a connecting cross-sectional shape is used, the loss due to the above-described high frequency is further reduced. Further, the advantage in the insulating sheath processing can be obtained in the same manner as in the above embodiments.

  As the conductor 2, for example, as shown in FIG. 8C, a plurality of portions whose front sectional shape is annular (or C-shaped) are arranged concentrically and perpendicular to the direction of the magnetic flux generated by the current between the portions. A space part 4 that divides the thickness in all directions may be formed, and a series of parts may be used. Also, as shown in FIG. The same effect as that obtained when the conductor 2 in FIG.

(Embodiment 6)
As shown in FIGS. 9A and 9B, the high-frequency power supply line 1 according to the present embodiment has a conductor portion made of a conductor 2 having a frontal cross-sectional shape embedded in an insulator 3.

  The conductor 2 used for this conductor part forms a space part 4 that divides the thickness in at least one direction, for example, between the center piece and the side piece, in the direction perpendicular to the direction of the magnetic flux generated by the current in a sectional view, The lower surface of the base piece is formed on the flat surface a. The end portion of the conductor 2 is exposed from the insulator 3 to the outside.

  Since this exposed part constitutes a contact part when connecting the feeders 1 to each other as shown in FIG. 9C using the connector 5, when the feeder part end is inserted into the connection case 5, The flat surface a of the conductor 2 exposed from the insulator 3 is in surface contact with the flat portion of the connection conductor 6 in the connector 5 as shown in FIG. That is, there is an effect that contact with higher reliability than line contact can be achieved, leading to reduction of contact resistance. Further, the loss reduction due to high frequency and the effect of the insulating sheath treatment can be obtained in the same manner as in the first embodiment.

  As shown in FIGS. 10 (a) and 10 (b), for example, when using a conductor 2 in which the front cross-sectional shape of a C-shaped concentric section is formed concentrically, the lower surface of the outer annular section is used. By using the flat surface a, as in the case of using the conductor 2 of FIGS. 9A to 9C, the contact reliability with the connection conductor 6 can be improved and the contact resistance can be reduced.

  Further, even in the conductor 2 of the first embodiment described above, as shown in FIG. 10C, a flat surface a is formed in the lower portion of the outer tube portion 2b in the drawing, and the connection is made so as to correspond to the flat surface a. The connection part of the container-side connection conductor 6 may be formed in a flat plate shape and brought into surface contact with the flat surface a in the space 4b.

(Embodiment 7)
The feeder line of this embodiment is shown in FIGS. The power supply line of this example has basically the same configuration as that of the first embodiment, and is different in that one side surface of the outer cylinder part 2b is a flat part 2d. Accordingly, the same members are denoted by the same reference numerals. As shown in FIGS. 12 and 13, the connector 5 for connecting the feeder line is configured by disposing a connection spring 50 having a U-shaped cross section in a socket (recess) 5 b formed in an insulating base 5 a. Is done. The connection spring 50 is fixed to the base 5a with a bottom piece, and both leg pieces 52 can be elastically deformed in a direction to increase the distance between each other, and on both sides of the outer cylinder 2b exposed at the end of each feeder line inserted into the socket 5b. By connecting with pressure, the power supply line is connected. One of the leg pieces 52 is formed with an arc-shaped presser 54 along the curved surface of the outer cylinder 2b, and the other leg piece is formed with a flat presser 54d that matches the flat part 2d of the outer cylinder 2b. The electrical connection is ensured by pressure welding.

14 and 15 show a modification of the above-described embodiment, in which the upper and lower surfaces of the outer cylinder 2b are arc-shaped surfaces, and flat portions 2d are formed on both the left and right side surfaces. In this case, flat pressers 54d are formed on both leg pieces 52 of the connection spring 50 used in the connector 5, respectively, so that the electrical connection with the feeder line is made more reliable. In addition, since the feeder line has a symmetrical cross-sectional shape, connection can be made without distinction between the left and right, and workability is improved.
(Embodiment 8)
The feed line of this embodiment is shown in FIGS. The power supply line of the present embodiment is basically the same as that of the first embodiment, and is different in that the bottom surface of the outer cylinder 2b is a flat portion 2d. Accordingly, the same members are denoted by the same reference numerals. The connector 5 for connecting the power supply line is configured by housing a connection conductor 53 and a push-up spring 55 in an insulating base 5a having a U-shaped cross section, and is connected to the outside of each power supply line inserted into the insulating base 5a. The connection conductor 53 is in pressure contact with the flat portion 2d on the bottom surface of the tube 2b to connect the feed line. Both leg pieces 5c of the base 5a can be elastically deformed, and the outer cylinder 2b, that is, the power supply line is arranged by accommodating the curved surface of the outer circumference of the outer cylinder 2b in an arc-shaped catch 5e formed at the upper end of both leg pieces 5c. The connector 5 is held at a predetermined position in the connector 5, and in this state, the push spring 55 presses the connection conductor 53 against the flat portion 2d on the bottom surface of the outer cylinder 2b. Also in the present embodiment, since the electrical connection is performed at the flat portion 2d, it is possible to stably connect the feeder lines. Also in the present embodiment, since the feeder line has a symmetrical cross-sectional shape, connection can be made without distinction between left and right, and workability is improved.

  In each of the above-described embodiments, the aspect in which the cross-sectional shape of the conductor is determined by bending the metal sheet has been shown. However, the present invention is not necessarily limited to these aspects. As shown in each modification, it is also possible to use a conductor 2 whose sectional shape is determined by metal extrusion.

Embodiment 1 is shown, (a) is a perspective view that can be partially omitted, (b) is a front view. 1A and 1B show a first embodiment, in which FIG. 1A is a partially omitted perspective view for explaining connection to a connector, and FIG. It is front sectional drawing of the example using another conductor of Embodiment 1. FIG. Embodiment 2 is shown, (a) is a perspective view that can be partially omitted, (b) is a front sectional view. 10 is a front sectional view of Embodiment 3. FIG. Embodiment 4 is shown, (a) is a partially omitted perspective view, (b) is a front enlarged sectional view of a conductor, (c) is a front enlarged sectional view of another example of a conductor. The other example of Embodiment 4 is shown, (a) is a perspective view which can be omitted partially, (b) is a front sectional view. FIG. 7 shows a fifth embodiment, (a) is a partially omitted perspective view, (b) is a front enlarged sectional view of a conductor, (c) is a front enlarged sectional view of another example of the conductor, and (d) is another conductor. It is a front expanded sectional view of the example of. FIG. 9 shows a sixth embodiment, (a) is a front cross-sectional view of a state connected to a connector, (b) is a partially omitted perspective view, and (c) is a partially omitted reduced perspective view illustrating connection to the connector. It is. (A) is the perspective view which can omit a part of conductor in another example of use of the conductor of Embodiment 6, (b) is the perspective view which can be partially omitted in another example of use of the conductor of Embodiment 6, (c) FIG. 6 is a perspective view of another example of use of a conductor corresponding to the first embodiment. FIG. 10 is a perspective view showing a power supply line according to a seventh embodiment. The front view which shows the connection state of a feeder line same as the above. Sectional drawing which shows the connection state of a feeder line same as the above. The perspective view which shows the change aspect of a feeder line same as the above Sectional drawing which shows the connection state of a feeder line same as the above. FIG. 10 is a perspective view showing a feeder line and a connector according to an eighth embodiment. The front view which shows the connection state of a feeder line same as the above. Sectional drawing which shows the connection state of a feeder line same as the above. The perspective view which shows the 1st change aspect of a feeder line same as the above. Sectional drawing which shows the connection state of a feeder line same as the above. It is a perspective view which can omit a part of conventional example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 High frequency electric supply line 2 Conductor 2a Inner cylinder part 2b Outer cylinder part 2c Connection part 3 Insulator 4a, 4b Space part A Direction of magnetic flux B Direction perpendicular to magnetic flux X Current direction

Claims (8)

A high-frequency feeder formed by integrally forming a conductor portion and an insulator, and the conductor portion divides a thickness in at least one direction in a direction perpendicular to the direction of magnetic flux generated by a current in a cross-sectional view. A high-frequency power supply, characterized in that a conductive portion other than the space portion is formed in a series, and an insulator is provided at least outside the conductor portion so as to be integrated with the insulator. Electrical wire. 2. The high-frequency feed line according to claim 1, wherein an insulator is disposed outside the space portion and the conductor portion, and the conductor portion is formed integrally with the insulator. 2. The high-frequency power supply line according to claim 1, wherein an insulator is disposed only outside the conductor portion excluding the space portion, and the conductor portion is formed integrally with the insulator. The high-frequency supply according to any one of claims 1 to 3, wherein the conductor portion is provided with a space portion that divides the thickness in all directions perpendicular to the direction of the magnetic flux generated by the current. Electrical wire. 5. The high-frequency power supply line according to claim 1, wherein the conductor portion includes a conductive portion formed of one conductive member. 6. The high-frequency power supply line according to any one of claims 1 to 5, wherein the conductor portion includes a flat portion in a part of the conductor portion. The high-frequency power supply line according to claim 6, wherein the flat portion is formed on an outer surface of the conductor portion. The high-frequency power supply line according to claim 7, wherein the flat portions are formed on both outer side surfaces of the conductor portion.

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