JP3542249B2 - High frequency power supply wiring - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency power supply wiring capable of supplying a current to a load at a long distance with a low power supply voltage by reducing the inductance of a reciprocating conductor cable.
[0002]
[Prior art]
Conventionally, when a current is supplied to a load using a high-frequency current, an expensive device is required as a high-frequency power supply.
However, recent advances in power electronics technology have made it possible to supply high-frequency current to a load using an inverter device, and the device has become inexpensive and widely used.
[0003]
[Problems to be solved by the invention]
However, when a high-frequency current flows from the power supply of the inverter device to the load using the reciprocating conductor cable, the reactance voltage drop due to the inductance generated in the reciprocating conductor cable due to the high frequency increases.
For this reason, there has been a problem that it is difficult to supply a current to a load that is long distance away with a low power supply voltage.
[0004]
The present invention solves the problems of the conventional high-frequency power supply, and reduces the inductance of the reciprocating conductor cable, thereby providing a high-frequency power supply wiring capable of supplying a current to a load at a long distance with a low power supply voltage. The purpose is to provide.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the high-frequency power supply wiring of the present invention is characterized in that, in the high-frequency power supply wiring composed of a reciprocating conductor cable, a metal body having good conductivity is arranged in parallel with a plane including the center of the core of the reciprocating conductor cable. And
[0006]
According to the present invention having the above-described configuration, the magnetic field generated in each cable can be canceled by disposing the metal body having good conductivity along the reciprocating conductor cable.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an embodiment of a high-frequency power supply wiring A according to the present invention. Reference numeral 1 denotes a reciprocating conductor cable used when a high-frequency current flows from the power supply of the inverter device to the load. The reciprocating conductor cable 1 is configured by arranging a going cable 1a and a returning cable 1b in parallel as shown in the figure. The outgoing cable 1a and the return cable 1b are both formed by integrally forming a coating insulation 4 on the outer peripheral portion of the core wire 3 which is a conductor.
High-frequency currents in opposite directions flow through the two cables 1a and 1b going forward and backward.
The high-frequency power supply wiring A of the present invention is composed of the reciprocating conductor cable 1 composed of the reciprocating cables 1a and 1b disposed close to each other and the metal member 5 having high conductivity disposed close to the reciprocating conductor cable 1. . This metal body 5 is parallel to a plane including both centers of the core wires 3 and 3 of the parallel going and returning cables 1a and 1b of the reciprocating conductor cable 1, and has a width of a length extending over both the conductor cables 1a and 1b. , And are provided adjacent to one side of both conductors. As the high conductivity material, for example, copper, aluminum, or the like is used.
[0008]
As a result, the high-frequency magnetic flux generated by the reciprocating currents flowing through the two cables 1a and 1b, which are going forward and backward, interlinks in the metal body 5, and an eddy current is induced in the metal body 5 to flow. The direction in which the eddy current flows is a direction in which the magnetic field generated by the eddy current cancels the magnetic flux generated by the reciprocating current. The action of the eddy current induced in the metal body 5 is due to the boundary condition for the perfect conductor plate, that is, the magnetic flux is parallel to the metal conductor plate, and approximately, as shown in FIG. It can be considered by replacing the image currents 2a and 2b. The directions of the current of the outgoing cable 1a and the image current 2a and the directions of the returning cable 1b and the image current 2b are opposite to each other.
Further, the inductance of the reciprocating conductor cable 1 is proportional to the amount of magnetic flux linking the space between the two forward and return cables 1a and 1b.
[0009]
In the present invention, by arranging the metal body in parallel with the reciprocating conductor cable, an eddy current is induced and flows in the metal body, and as shown in FIG. 2, the image currents 2a, 2a, The direction of the current 2b is opposite to the direction of the current flowing through each cable 1a, 1b of the reciprocating conductor cable 1. Therefore, the eddy current in the metal body has the effect of canceling the magnetic field generated by the current of each cable 1a, 1b of the reciprocating conductor cable 1, and reduces the amount of magnetic flux linked to the space between the cables 1a, 1b. As a result, the inductance of the reciprocating conductor cable can be reduced.
[0010]
Although the example shown in the drawing shows an example in which the metal member 5 is provided on one side of both cables 1a and 1b in parallel with the cable, the metal member 5 has a length extending between both cables 1a and 1b. It may be arranged on the cable center line.
[0011]
【The invention's effect】
According to the present invention, by arranging the metal body in parallel with the plane including the center of the reciprocating conductor cable, the magnetic field generated in the reciprocating conductor cable is canceled, the amount of magnetic flux interlinking between the cables is reduced, and the reciprocating conductor cable is reciprocated. Since the inductance of the conductor cable can be reduced, the reactance voltage drop due to the inductance of the reciprocating conductor cable can be suppressed even for high-frequency current, and as a result, the high-frequency current can be supplied to a long-distance load with a low power supply voltage. .
[Brief description of the drawings]
FIG. 1 is a sectional view of a high-frequency power supply wiring showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing the direction of the flow of an eddy current.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 reciprocating conductor cable 1 a forward cable 1 b return cable 2 a image current 2 b equivalent to eddy current image current 3 equivalent to eddy current 3 core wire 4 coating insulation 5 metal body A high-frequency power supply wiring

Claims (1)

A high-frequency power supply wiring comprising a reciprocating conductor cable, wherein a high-conductivity metal body is arranged parallel to a plane including the center of the core of the reciprocating conductor cable.

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