WO2016027363A1

WO2016027363A1 - Transmission cable

Info

Publication number: WO2016027363A1
Application number: PCT/JP2014/071982
Authority: WO
Inventors: 聖友西郷
Original assignee: 合同会社３３
Priority date: 2014-08-22
Filing date: 2014-08-22
Publication date: 2016-02-25

Abstract

The purpose of the present invention is to improve transmission characteristics through a simpler structure. For each of a first electric wire 11 and a second electric wire 12, a layer in which a plurality of graphite cluster diamond particles X are dispersed in an insulative synthetic resin material is formed on the outer circumferences of core wires 11a, 12a made of a conductor. The core wire 11a of the first electric wire 11 is formed thicker than the core wire 12a of the second electric wire 12. The first electric wire 11 and the second electric wire 12 are bundled approximately parallel to each other to form a transmission cable.

Description

Transmission cable

The present invention relates to a transmission cable used for transmitting electric signals and electric power.

In recent years, the amount of information transmitted by electric signals has been increasing, and accordingly, transmission characteristics such as the speed at which electric energy is transmitted become a problem in LAN cables, USB memories, hard disks, and the like. .
For example, when transmitting a pulse wave by a transmission cable and measuring the time when the pulse wave rises on the input side of the transmission cable and the time when the pulse wave rises on the output side of the transmission cable, the former time On the other hand, the latter time is delayed. This delay time is considered to be different due to the material and structure of the transmission cable.

For example, Patent Document 1 discloses an invention that improves the transmission characteristics as described above.
The present invention includes parallel first and second conductive wires, and third and fourth conductive wires that are intertwined with each other by forming an intersection with the first and second conductive wires, and these first to fourth conductive wires. A transmission medium in which the input end side and the output end side of each are connected in common.
And in patent document 1, it has confirmed by experiment that a phase delay can be improved when the electrical signal is transmitted with the said transmission medium.
Further, as described in Patent Document 2, the transmission medium of Patent Document 1 is also used to improve transmission efficiency by being configured in a coil shape and inserted in series between a solar cell and an inverter. It is done.

However, according to the prior art, since it has a network structure in which the first to fourth conductive wires are intertwined in a complicated manner, for example, a dedicated manufacturing apparatus shown in Patent Document 3 is required, and thus in terms of manufacturing and cost. Improvement is required and handling is not easy.
Further, in the state where the mesh structure is exposed, there are concerns about the performance in terms of durability such as wear resistance and heat resistance, and it is necessary to devise such as providing a coating material according to the usage environment.

Japanese Patent No. 4335974 Japanese Patent No. 4390852 JP 2009-4283 A

The present invention has been made in view of the above-described conventional circumstances, and a problem to be solved by the present invention is to provide a transmission cable that can obtain good durability performance and transmission characteristics with a simpler and easier-to-handle structure. It is in.

The inventor of the present application diligently studied to solve this problem, and as a result of repeated trial and error, the inventors succeeded in greatly improving the transmission characteristics by the following technical means with a simple structure and confirmed the experiment.
In this technical means, for each of the first electric wire and the second electric wire, a layer in which a large number of graphite cluster diamond particles are dispersed in an insulating synthetic resin material is formed on the outer periphery of the core wire made of a conductor. The core wire of the first electric wire is formed thicker than the core wire of the second electric wire, and the first electric wire and the second electric wire are bundled substantially in parallel.

Since the present invention is configured as described above, it is possible to obtain good durability performance and transmission characteristics with a simpler and easier-to-handle structure as compared with the prior art.

It is a top view which shows an example of a transmission cable. It is sectional drawing of the electric wire which comprises the transmission cable. It is sectional drawing which shows typically the crystal structure of a graphite cluster diamond. It is an experimental circuit diagram for measuring the transmission characteristic of the transmission cable. FIG. 5 is a diagram showing a pulse waveform on the output side in the experimental circuit shown in FIG. 4. It is a table | surface which shows the result of the comparative experiment which measured delay time with the experimental circuit shown in FIG. It is a top view which shows the other example of a transmission cable. It is a perspective view which shows an example of the transmission apparatus using the transmission cable. It is a perspective view which shows an example of the transmission circuit using the transmission apparatus. It is a table | surface which shows the result of the comparative experiment which measured the electric power generation amount using the transmission circuit shown in FIG.

The first feature of the present embodiment is that for each of the first electric wire and the second electric wire, a large number of graphite cluster diamond particles are dispersed in an insulating synthetic resin material on the outer periphery of the core wire made of a conductor. A layer is formed, the core wire of the first electric wire is formed thicker than the core wire of the second electric wire, and the first electric wire and the second electric wire are bundled substantially in parallel.

The second feature is that the layer is a second layer, and includes a first layer that covers the core wire on an inner peripheral side of the second layer, and a third layer that covers the outer periphery of the second layer. These first and third layers were formed from an insulating synthetic resin material.

The third feature is that the core wires of the two electric wires are connected to each other on one end side and the other end side of the first and second electric wires.

The fourth feature is that the first electric wire and the core wire of the second electric wire are connected to each other at one end side of the first and second electric wires, and the second end is connected to the core wire of the first electric wire at the other end side. The core wire of the electric wire was in a non-contact state.

The fifth feature is that the core wire in the first and second electric wires is a copper wire, and the synthetic resin material of each layer is a urethane resin.

Next, a preferred embodiment according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the transmission cable 10 is formed by bundling a first electric wire 11 and a second electric wire 12 substantially in parallel, and the

core wires

11 a and 12 a are connected to each other at one end side and the other end side. Electrically connected.

As shown in FIG. 2, the 1st electric wire 11 has a coating | cover over the outer periphery of the core wire 11a consisting of a conductor. This coating is formed by laminating a first layer 11b, a second layer 11c, and a third layer 11d in order from the inside.
In a similar manner, the second electric wire 12 has a coating on the outer periphery of the core wire 12a made of a conductor over the entire periphery. The coating includes the first layer 12b, the second layer 12c, and the third layer. 12d are laminated in order from the inside.
These first electric wires 11 and second electric wires 12 have different thicknesses, but have the same cross-sectional structure as shown in FIG.

According to an example of the present embodiment, the

core wires

11a and 12a of the first and second

electric wires

11 and 12 are both single copper wires.
The core wire 11 a of the first electric wire 11 is formed thicker than the core wire 12 a of the second electric wire 12. More specifically, in this example, the diameter d of the core wire 11a of the first electric wire 11 is about three times the diameter d of the core wire 12a of the second electric wire 12, and the diameter d of the core wire 11a is φ0. The diameter d of the core wire 12a is φ0.1 mm.

The first layer 11b (or 12b) is a layer made of an insulating synthetic resin material, and covers the outer periphery of the core wire 11a (or 12b) in a cylindrical shape over the entire circumference.
The second layer 11c (or 12c) is a layer in which a large number of graphite cluster diamond particles are scattered in an insulating synthetic resin material, and the outer periphery of the first layer 11b (or 12b) is cylindrical over the entire circumference. Covered.
The third layer 11d (or 12d) is a layer made of an insulating synthetic resin material, and covers the outer periphery of the second layer 11c (or 12c) in a cylindrical shape over the entire circumference.

The synthetic resin material constituting the first to third layers 11b to 11d (or 12b to 12d) is the same type of synthetic resin material, and urethane resin is used in one example of this embodiment.

In the first electric wire 11, the total thickness t of the coating composed of the first to

third layers

11b, 11c, 11d is 390 μm (about 400 μm). The breakdown is that the thickness t1 of the first layer 11b is 20 μm, the thickness t2 of the second layer 11c is 350 μm, and the thickness t3 of the third layer 11d is 20 μm.
In the second electric wire 12, the thickness t of the entire coating composed of the first to

third layers

12b, 12c, 12d is 114 μm. The breakdown is that the thickness t1 of the first layer 11b is 7 μm, the thickness t2 of the second layer 11c is 100 μm, and the thickness t3 of the third layer 11d is 7 μm.
Each of the layers is formed by repeating the process of passing the core wire 11a (or 12a) through the molten coating material a plurality of times.

As shown in FIG. 3, the graphite cluster diamond particles X contained in the

second layers

11c and 12c have a pure diamond x1 in the center covered with diamond-like carbon x2 and further covered with graphite carbon x3. The crystal has a three-layer structure and has a diameter of about 15 nm. The particle X has electrical conductivity.

The blending ratio of the graphite cluster diamond particles X contained in the

second layers

11c and 12c is within a range of 0.75 to 5% by weight. If it is smaller than this range, sufficient performance in durability and electrical characteristics cannot be exhibited, and if it exceeds the above range, variation in the layer thickness occurs in the longitudinal direction of the electric wire, and it is difficult to stabilize the electrical characteristics.
A more preferable range of the blending ratio is within a range of 0.75 to 1%, and in the example of this embodiment, it is about 1%.

Next, the results of a comparative experiment on the transmission characteristics of the transmission cable 10 having the above configuration will be described.
An experimental circuit 100 shown in FIG. 4 is an electric circuit in which a pulse wave output from the signal transmission device 101 is caused to flow through a 50Ω resistor 102. Each output terminal of the signal transmission device 101 and each terminal of the resistor 102 are connected to each other. In between, the sample 110 is connected in series. In the figure,

reference numerals

111 and 111 denote input terminals of two

samples

110 and 110.

Reference numerals

112 and 112 are output terminals of the two

samples

110 and 110.
As the signal transmission device 101, a signal generator AFG3102 manufactured by Tektronix was used.
Further, an unillustrated oscilloscope (DSC-9506, manufactured by Techio Technology Co., Ltd.) is connected to the

input terminals

111 and 111 and the

output terminals

112 and 112, and the input waveform (reference waveform W0) and output waveform W1 are connected by the oscilloscope. Were measured simultaneously. Then, as shown in FIG. 5, the delay time T of the output waveform W1 was calculated with respect to the reference waveform W0.

Sample 110 is any one of Examples 1 and 2 and Comparative Examples 1 to 3 shown in the table of FIG. In the example of FIG. 4, each sample 110 is arranged in a straight line. However, due to the experimental space and the like, the experiment is actually performed with each sample 110 wound around a bobbin (not shown). went.

Example 1 is the transmission cable 10 which has the said cross-sectional structure.
In the second embodiment, the

second layers

11c and 12c and the third layers 11d and 12d are omitted from the transmission cable 10 having the cross-sectional structure.
In Comparative Example 1, the core wire 11a of the first electric wire 11 and the core wire 12a of the second electric wire 12 have the same thickness with respect to the transmission cable 10 having the above-described cross-sectional structure.
In Comparative Example 2, only the

second layers

11c and 12c are omitted from the transmission cable 10 having the cross-sectional structure.
In Comparative Example 3, the core wire 11a of the first electric wire 11 and the core wire 12a of the second electric wire 12 have the same thickness with respect to the transmission cable 10 having the cross-sectional structure, and only the

second layers

11c and 12c are omitted. It was. That is, the comparative example 3 is a bundle of two general electric wires having the same thickness.

As a result of the above experiment, as shown in FIG. 6, it was confirmed that in Examples 1 and 2, the delay time T was remarkably shortened as compared with Comparative Examples 1 to 3.

Therefore, according to the transmission cable 10 according to the present invention, the coating including the graphite cluster diamond can improve the performance in terms of durability such as wear resistance and heat resistance, and the electrical energy is transmitted as shown in the above experimental results. Speed can be improved.

Next, another example of the transmission cable according to the present invention will be described.
The transmission cable 20 shown in FIG. 7 connects the

core wires

11a and 12a to each other at one end side (right end side according to the illustrated example) of the first and second

electric wires

11 and 12 bundled substantially in parallel. On the end side (the left end side in the illustrated example), the core wire 12 a of the second electric wire 12 is not in contact with the core wire 11 a of the first electric wire 11.
The other structure of the transmission cable 20 is the same as that of the transmission cable 10 described above.
According to this transmission cable 20, since the current directions are different between the substantially parallel first electric wire 11 and second electric wire 12, the magnetic field generated by these electric wires is canceled out. Moreover, since the 1st electric wire 11 and the 2nd electric wire 12 are adjoining in the insulated state, a floating capacity exists between these electric wires.
The transmission cable 20 is used to configure the transmission device 1 and the transmission circuit 200 as shown in FIGS.

The transmission device 1 includes a magnetic core 30 and the transmission cable 20 wound around the magnetic core 30 in a coil shape.
In this transmission device 1, the transmission cable 20 has a portion between the one end side (the right end side according to FIG. 8) that connects the

core wires

11 a and 12 a and the other end side that is opposite to the one end side. A so-called bifilar winding coil is formed by winding the body core 30 in a coil shape.

The magnetic core 30 is a magnetic core material made of a magnetic material, and for example, an EI type core made of ferrite is used.

The transmission device 1 having the above-described configuration is connected in series in an electrical wiring that supplies power in which a direct current component and a harmonic component are superimposed.
For example, the transmission circuit 200 illustrated in FIG. 9 includes a DC power supply 40 and an inverter device 50 that inputs power from the DC power supply 40 and outputs AC power, and electrical wiring between the DC power supply 40 and the inverter device 50. The transmission device 1 is connected in series.

The direct current power source 40 is obtained by electrically connecting a plurality (three in the illustrated example) of

solar cells

41, 42, and 43 in series between output terminals.
Each

solar cell

41, 42 or 43 is a semiconductor solar cell having a known structure in which an n-type semiconductor and a p-type semiconductor are stacked. For example, a general silicon solar cell, an organic solar cell, a group IIIV solar cell, or the like is used. be able to.

The inverter device 50 converts the DC power input from the DC power source 40 into AC power having a necessary frequency and voltage and outputs it, and uses a known device called a power conditioner or the like.

In the transmission circuit 200, the transmission device 1 having the above-described configuration is inserted in series in the minus-side electrical wiring between the DC power supply 40 and the inverter device 50.
This transmission device 1 uses an EI type core as the magnetic core 30, and a predetermined number of the transmission cables 20 having the above configuration are wound around the outer periphery of the core.

The number of turns of the coiled portion in the transmission cable 20 is appropriately set so as to have a resonance frequency corresponding to the harmonic component of the transmission circuit 200.
In an example of this embodiment, a PC40 (TDK company name), EI30 type (length 30 mm, width 30 mm) core was used as the magnetic core 30, and the number of turns was 9T.
As another example, a PC40, EI48 type (longitudinal dimension 48 mm, lateral dimension 48 mm) core is used for the magnetic core 30 and the number of turns is set to 48T.

Next, the result of a comparative experiment in which transmission characteristics are measured using the transmission circuit 200 will be described (see FIG. 10).
The embodiment in FIG. 10 is a circuit in which the inverter device 50 is replaced with an electronic load device 50 ′ in the transmission circuit 200 (see FIG. 9). 10 is a circuit in which the transmission apparatus 1 is omitted from the circuit of the above embodiment.

In the transmission apparatus 1 as an example of this experiment, the EI30 type core was used as the magnetic core 30, and the number of turns of the transmission cable 20 was 9T.

In this experiment, a single solar cell module having the following specifications was used as the

solar cells

41, 42, and 43.
[Solar cell module specifications]
Nominal maximum output (Pm): 20W
Nominal open circuit voltage (Voc): 21.6V
Nominal short circuit current (Isc): 1.25A
Nominal maximum output operating voltage (Vpm): 17.0V
Nominal maximum output operating current (Ipm): 1.18A
Maximum system voltage: 30V
(Test conditions: solar radiation intensity 1000 W / m ² , module temperature 25 ° C.)

As the electronic load device 50 ', a multi-function DC electronic load device (model number: PLZ164W) manufactured by Kikusui Electronics Co., Ltd. was used in the constant voltage mode. This multi-function DC electronic load device converts an input voltage into a predetermined voltage, applies a load to the converted DC voltage, and measures and displays the load side voltage, current, power, and the like.

In this experiment, the voltage, current, and power on the load side displayed by the electronic load device 50 ′ under substantially the same measurement conditions (for example, the amount of sunlight) for each of the example and the comparative example. Was recorded (see FIG. 10).

From the table | surface shown in FIG. 10, in an Example, an electric current and electric power have increased notably compared with the comparative example.
That is, the transmission cable 20 and the transmission device 1 according to the present invention improve the influence of the high-frequency component, resistance component, capacitance component, inductance component, etc. in the transmission path caused by the internal circuit of the electronic load device 50 ′, It is considered that transmission characteristics, transmission efficiency, and the like have been improved.

In addition, the dimension of each part of the 1st electric wire 11 and the 2nd electric wire 12, the dimension of the magnetic body core 30, the winding number of the transmission cable 20, etc. used the use of the

transmission cable

10 or 20, and this transmission cable. Changes can be made as appropriate according to the capacity of the apparatus.

Further, according to the illustrated example, the first electric wire 11 and the second electric wire 12 are bundled without bonding, but as another example, handling of the plurality of electric wires is facilitated. For this purpose, they may be integrated by bonding in a parallel state or by being inserted into another tubular coating.

Moreover, according to the said Example, although the core wire 11a and the core wire 12a were made into the copper wire which is a single wire as a particularly preferable example, as another example, the copper wire which is a twisted wire, and the conductor of another material can also be used. Is possible.

Moreover, according to the said Example, although the transmission apparatus 1 was connected in series in the electrical wiring between the

solar cells

41,42,43 and the inverter apparatus 50 as a particularly preferable example, If it is connected in series in an electrical wiring through which electric power in which a direct current component and a harmonic component are superimposed is passed, the above-mentioned effect is exhibited. It is also possible to adopt a mode in which the transmission device 1 is connected in series in the electrical wiring, a mode in which the transmission device 1 is connected in series to another transmission line containing harmonic components, or the like.

1: Transmission device 10, 20: Transmission cable 11: First electric wire 12: Second

electric wire

11a, 12a:

Core wire

11b, 12b:

First layer

11c, 12c: Second layer 11d, 12d: Third Layer X: Particles of graphite cluster diamond 30: Magnetic core 40:

DC power supply

41, 42, 43: Solar cell 50: Inverter device 50 ': Electronic load device 100: Experimental circuit 200: Transmission circuit

Claims

For each of the first electric wire and the second electric wire, a layer in which a large number of graphite cluster diamond particles are dispersed in an insulating synthetic resin material is formed on the outer periphery of the core wire made of a conductor.
The core wire of the first electric wire is formed thicker than the core wire of the second electric wire,
A transmission cable, wherein the first electric wire and the second electric wire are bundled substantially in parallel.
The layer is the second layer,
A first layer that covers the core wire on the inner peripheral side of the second layer and a third layer that covers the outer periphery of the second layer, and the first and third layers are made of an insulating compound The transmission cable according to claim 1, wherein the transmission cable is made of a resin material.
The transmission cable according to claim 1 or 2, wherein the core wires of the two electric wires are connected to each other on one end side and the other end side of the first and second electric wires.
The core wires of the first electric wire and the second electric wire are connected to each other at one end side of the first and second electric wires, and the core wire of the second electric wire is not contacted with the core wire of the first electric wire at the other end side. The transmission cable according to claim 1, wherein the transmission cable is in a state.
The transmission cable according to any one of claims 1 to 4, wherein the core wire in the first and second electric wires is a copper wire, and the synthetic resin material of each layer is a urethane resin.