Electric wire connector, electric wire routing structure, electric wire noise radiation directivity control method, and electric wire routing method

Abstract

To provide an electric wire connector, an electric wire routing structure, an electric wire noise radiation directivity control method, and an electric wire routing method that can improve routing freedom while suppressing the effects of noise.SOLUTION: An electric wire connection body 10 includes an electric wire 20, first connected bodies 26, 30, 80 connected to one end of an electric wire portion 21 of the electric wire 20 via a first impedance change point 2a, and second connected bodies 26, 40, 80 connected to the other end of the electric wire portion 21 via a second impedance change point 2b. The length of the electric wire portion 21 is longer than half the wavelength of noise flowing through the electric wire portion 21. The electric wire portion 21 is bent such that the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 changes.SELECTED DRAWING: Figure 15

Description

[Technical Field]

[0001] The present invention relates to an electric wire connector, an electric wire routing structure, a method for controlling radiation directivity of electric wire noise, and an electric wire routing method. [Background technology]

[0002] A conventional technique of this type is disclosed in Patent Document 1. In Patent Document 1, the current flow direction of an external harness arranged along the outer surface of a housing is set to intersect with the current flow direction of an internal harness arranged inside the housing. This makes it possible to suppress the effect of radiation noise from the internal harness generated when current is applied on the external harness. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2022-149944 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-described conventional technology, the electric wires must be arranged in a crossing state, which limits the degree of freedom in routing the electric wires.

[0005] The present invention has been made in consideration of the problems inherent in the prior art, and an object of the present invention is to provide an electric wire connector, an electric wire routing structure, an electric wire noise radiation directivity control method, and an electric wire routing method that are capable of improving routing flexibility while suppressing the effects of noise. [Means for solving the problem]

[0006] An electric wire connection body according to an embodiment of the present invention comprises an electric wire having an electric wire portion, a first connected body connected to one end of the electric wire portion via a first impedance change point, and a second connected body connected to the other end of the electric wire portion via a second impedance change point, wherein the length of the electric wire portion is longer than half the wavelength of noise flowing through the electric wire portion, and the electric wire portion is bent so as to change the direction of a null in the radiation characteristics of the noise flowing through the electric wire portion.

[0007] An electric wire routing structure according to an embodiment of the present invention comprises an electric wire having an electric wire portion, a first connected body connected to one end of the electric wire portion via a first impedance change point, and a second connected body connected to the other end of the electric wire portion via a second impedance change point, wherein the length of the electric wire portion is longer than half the wavelength of the noise flowing through the electric wire portion, the electric wire portion is bent so as to change the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion, and a power distribution member is arranged in the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion.

[0008] A method for controlling the radiation directivity of electric wire noise according to an embodiment of the present invention is a method for controlling the radiation directivity of noise flowing in an electric wire portion of an electric wire, and includes the steps of connecting a first connected object to one end of the electric wire portion via a first impedance change point, connecting a second connected object to the other end of the electric wire portion via a second impedance change point, and bending the electric wire portion to change the direction of a null in the radiation characteristics of noise flowing in the electric wire portion.

[0009] An electric wire routing method according to an embodiment of the present invention is a method of routing an electric wire around a power distribution member, and includes the steps of connecting a first connected object to one end of a wire portion of the electric wire via a first impedance change point, connecting a second connected object to the other end of the wire portion via a second impedance change point, bending the wire portion to change the direction of a null in the radiation characteristics of noise flowing through the wire portion, and routing the electric wire so that the power distribution member is positioned in the direction of the null in the radiation characteristics of noise flowing through the wire portion. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a wire connector, a wire routing structure, a method for controlling the radiation directivity of wire noise, and a wire routing method that can improve the degree of freedom in routing while suppressing the effects of noise. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing an example of an electric wire connector. [Figure 2] FIG. 2 is a model diagram approximating an example of an electric wire connector. [Figure 3] FIG. 3 is a diagram showing a noise radiation area when the length of the electric wire portion is half the wavelength of the noise flowing through the electric wire portion. [Figure 4] FIG. 4 is a chart showing the radiation directivity of noise when the length of the electric wire is half the wavelength of the noise flowing through the electric wire. [Figure 5] FIG. 5 is a diagram showing a noise radiation area when the length of the electric wire portion is one wavelength of the noise flowing through the electric wire portion. [Figure 6] FIG. 6 is a chart showing the radiation directivity of noise when the length of the electric wire is one wavelength of the noise flowing through the electric wire. [Figure 7] FIG. 7 is a diagram showing a noise radiation area when the length of the electric wire portion is two wavelengths of the noise flowing through the electric wire portion. [Figure 8] FIG. 8 is a chart showing the radiation directivity of noise when the length of the electric wire portion is two wavelengths of the noise flowing through the electric wire portion. [Figure 9] FIG. 9 is a model diagram approximating a state in which electric wire connectors are linearly arranged, with the length of the electric wire portion being one wavelength of the noise flowing through the electric wire portion. [Figure 10] FIG. 10 is a diagram showing a noise radiation area when the model diagram shown in FIG. 9 is used. [Figure 11]FIG. 11 is a chart showing the noise radiation directivity when the model diagram shown in FIG. 9 is used. [Figure 12] FIG. 12 is a model diagram approximating an example of a state in which an electric wire portion whose length is one wavelength of the noise flowing through the electric wire portion is bent and arranged. [Figure 13] FIG. 13 is a diagram showing a noise radiation area when the model diagram shown in FIG. 12 is used. [Figure 14] FIG. 14 is a chart showing the noise radiation directivity when the model diagram shown in FIG. 12 is used. [Figure 15] FIG. 15 is a diagram showing an example of an electric wire routing structure. [Figure 16] FIG. 16 is a model diagram approximating a first modified example in which an electric wire portion having a length equal to one wavelength of the noise flowing through the electric wire portion is bent and arranged. [Figure 17] FIG. 17 is a model diagram approximating a second modified example in which an electric wire portion having a length equal to one wavelength of the noise flowing through the electric wire portion is bent and arranged. [Figure 18] FIG. 18 is a chart showing the noise radiation directivity when the model diagrams shown in FIGS. 16 and 17 are used. [Figure 19] FIG. 19 is a model diagram approximating an example of a state in which the electric wire portion is bent and arranged. [Figure 20] FIG. 20 is a chart showing the radiation directivity of noise when the length of the electric wire portion is one wavelength of the noise flowing through the electric wire portion in the model diagram shown in FIG. [Figure 21] FIG. 21 is a chart showing the radiation directivity of noise when the length of the electric wire portion is two wavelengths of the noise flowing through the electric wire portion in the model diagram shown in FIG. [Figure 22] FIG. 22 is a model diagram approximating another example of a state in which the electric wire portion is bent and arranged. [Figure 23] FIG. 23 is a chart showing the radiation directivity of noise when the length of the electric wire portion is two wavelengths of the noise flowing through the electric wire portion in the model diagram shown in FIG. [Figure 24] FIG. 24 is a model diagram approximating the first modified example of the electric wire connector. [Figure 25] FIG. 25 is a chart showing the radiation directivity of noise when the length of the electric wire portion is one wavelength of the noise flowing through the electric wire portion in the model diagram shown in FIG. [Figure 26] FIG. 26 is a model diagram approximating the second modified example of the electric wire connector. [Figure 27] FIG. 27 is a chart showing the radiation directivity of noise when the length of the electric wire portion is two wavelengths of the noise flowing through the electric wire portion in the model diagram shown in FIG. [Figure 28] FIG. 28 is a diagram showing a third modified example of the electric wire connector. [Figure 29] FIG. 29 is a diagram showing a fourth modified example of the electric wire connector. [Figure 30] FIG. 30 is a diagram showing an example of a method for forming an impedance change point midway along a single line. [Figure 31] FIG. 31 is a diagram showing an example of a method for forming an impedance change point midway along a twisted pair wire. [Figure 32] FIG. 32 is a diagram showing another example of a method for forming an impedance change point midway along a twisted pair wire. DETAILED DESCRIPTION OF THE INVENTION

[0012] The following describes in detail the electric wire connector, the electric wire routing structure, the electric wire noise radiation directivity control method, and the electric wire routing method according to the present embodiment with reference to the drawings. Note that the dimensional proportions in the drawings are exaggerated for the convenience of explanation and may differ from the actual proportions.

[0013] In the following description, the direction in which a straight electric wire extends is defined as the Y direction, the direction perpendicular to the Y direction is defined as the X direction, and the direction perpendicular to the Y and X directions is defined as the Z direction.

[0014] In this embodiment, an electric wire connection body 10 shown in Fig. 1 is used. This electric wire connection body 10 includes an electric wire 20, a first device (first connected body) 30 connected to one end of the electric wire 20, and a second device (second connected body) 40 connected to the other end of the electric wire 20.

[0015] The electric wire connector 10 is routed around the electric power distribution member 70 to form an electric wire routing structure 1 (see FIG. 15).

[0016] In this embodiment, the directionality of the noise can be controlled by devising the layout of the electric wire 20 in accordance with the noise superimposed on the electric wire 20. By controlling the directivity of the noise, it is possible to control the direction at which the noise becomes a null point. In this way, it is possible to reduce the impact of the noise flowing through the electric wire 20 on the power distribution member 70 without increasing the distance or crossing the electric wires.

[0017] Specifically, the first device (first connected object) 30 is connected in a state where an impedance difference occurs between it and the electric wire 20. In other words, the first device (first connected object) 30 is connected to the electric wire 20 via the first impedance change point 2a.

[0018] Also, the second device (second connected body) 40 is connected in a state where an impedance difference occurs between it and the electric wire 20. That is, the second device (second connected body) 40 is connected to the electric wire 20 via the second impedance change point 2b.

[0019] The portion of the electric wire 20 between the first impedance change point 2a and the second impedance change point 2b is the electric wire portion 21. Therefore, in the electric wire connection body 10 shown in FIG.

[0020] 1 includes an electric wire 20 having an electric wire portion 21, and a first device (first connected body) 30 connected to one end of the electric wire portion 21 via a first impedance change point 2a. The electric wire connection body 10 shown in FIG. 1 also includes a second device (second connected body) 40 connected to the other end of the electric wire portion 21 via a second impedance change point 2b.

[0021] Then, by generating an impedance difference between the electric wire 20 and the first device (first connected body) 30 and between the electric wire 20 and the second device (second connected body) 40, the first and second impedance change points 2a and 2b become nodes of the noise wave. This makes the radiation directivity of the noise flowing through the electric wire 20 clear.

[0022] Various types of electric wires, such as a single wire or a twisted pair wire, can be used as the electric wire 20. Also, electric wires for various purposes, such as a communication line or a power supply line, can be used. However, since it is necessary to generate an impedance difference between the electric wire 20 and the first device (first connected object) 30, and between the electric wire 20 and the second device (second connected object) 40, it is preferable to use a single wire, a twisted pair wire, or the like without a shield (an outer conductor that covers the communication line).

[0023] Furthermore, the first device (first connected body) 30 and the second device (second connected body) 40 may be various members such as electrical components mounted on a vehicle.

[0024] In this embodiment, the length of the electric wire portion 21 is set to be longer than half the wavelength of the noise flowing through the electric wire portion 21 .

[0025] The reason why the length of the electric wire portion 21 is set to be longer than half the wavelength of the noise flowing through the electric wire portion 21 will be explained below based on the results of a simulation using the model diagram of the electric wire connection body 10 shown in FIG.

[0026] 2 shows a model diagram in which a 1000 mm long electric wire 20 is placed at a height of 50 mm on a metal ground plate 50 that is 2000 mm horizontally and 1000 mm vertically. In the model diagram shown in FIG. 2, signal ports 60 are provided on both ends of the electric wire 20, and these signal ports 60 allow the electric wire 20 to be placed at a height of 50 mm above the ground plate 50.

[0027] The impedance of the signal port 60 is set to 50 ohms. Generally, when a high-frequency current is passed through a communication line, the impedance expected within the first device 30 and the second device 40 is approximately 50 ohms, so the impedance of the signal port 60 is set to 50 ohms in the model diagram shown in Fig. 2. Furthermore, the impedance of a typical communication line (electric wire 20) is approximately 230 ohms.

[0028] 2, the electric wire 20 corresponds to the electric wire 20 and the electric wire portion 21 of the electric-wire connection body 10 shown in Fig. 1. Furthermore, the signal port 60 connected to one end side (left side in Fig. 2) of the electric wire 20 corresponds to the first device (first connected body) 30, and the connection portion between one end of the electric wire 20 and the signal port 60 on that side corresponds to the first impedance change point 2a. Furthermore, the signal port 60 connected to the other end side (right side in Fig. 2) of the electric wire 20 corresponds to the second device (second connected body) 40, and the connection portion between the other end of the electric wire 20 and the signal port 60 on the other side corresponds to the second impedance change point 2b.

[0029] Therefore, the model diagram shown in FIG. 2 is an approximation of the electric wire connection body 10 shown in FIG.

[0030] The following describes the radiation characteristics during high-frequency signal transmission obtained by simulation using the model diagram (1000 mm long electric wire 20) shown in Figure 2. This radiation characteristic during high-frequency signal transmission imitates the radiation characteristics of noise flowing through the 1000 mm long electric wire 20.

[0031] First, when the length of the electric wire 20 (1000 mm) is half the wavelength of the noise flowing through the electric wire 20, a single amplitude is generated over the entire electric wire 20, and the radiation region R1 has the shape shown in Figure 3. This radiation region R1 is set based on the radiation characteristics (electromagnetic field distribution around the electric wire 20) during high-frequency signal transmission obtained by simulation, and the power distribution components present within the radiation region R1 are strongly affected by the radiation (noise). Therefore, positions outside the radiation region R1 are areas that are less affected by the radiation (noise).

[0032] If the length of the electric wire 20 is set to half the wavelength of the noise, as can be seen from the chart shown in Fig. 4, the electric wire 20 has the characteristic of radiating the maximum noise in the direction (X direction) perpendicular to the extending direction (Y direction) of the electric wire 20. Note that the chart shows the radiation pattern as seen from the far field (observed at an infinitely far point).

[0033] From this, it can be seen that when the length of the electric wire 20 is half the wavelength of the noise, in order to change the directivity of the noise, it is necessary to change the overall position of the electric wire connection body 10, for example, by rotating the entire electric wire connection body 10 on the XY plane.

[0034] Therefore, when the length of the electric wire 20 is half the wavelength of the noise, it is found that the directionality of the noise cannot be controlled by the arrangement of the electric wire 20 when the first device (first connected body) 30 and the second device (second connected body) 40 are placed in predetermined positions.

[0035] The wavelength of the noise flowing through the electric wire 20 can be obtained by dividing the speed of light by the frequency. Therefore, if the frequency of the current flowing through the electric wire 20 is 150 MHz, half the wavelength of the noise is 1000 mm, which is the length of the electric wire 20 in the model diagram of Figure 2. In this way, the wavelength of the noise flowing through the electric wire 20 can be predicted from the frequency of the current flowing through the electric wire 20.

[0036] Next, a case will be described in which the length of the electric wire 20 (1000 mm) is one wavelength of the noise flowing through the electric wire 20. In the model diagram of Fig. 2, when the frequency of the current flowing through the electric wire 20 is 300 MHz, the length of the electric wire 20 (1000 mm) is one wavelength of the noise flowing through the electric wire 20.

[0037] When the length of the electric wire 20 is one wavelength of the noise, it can be seen that two amplitudes are generated with a node at the center of the electric wire 20, as shown in Fig. 5. Furthermore, it can be seen from the chart shown in Fig. 6 that the noise flowing through the electric wire 20 has radiation directivity in two directions.

[0038] Next, a case will be described in which the length (1000 mm) of the electric wire 20 is two wavelengths of the noise flowing through the electric wire 20. In the model diagram of Fig. 2, when the frequency of the current flowing through the electric wire 20 is 600 MHz, the length (1000 mm) of the electric wire 20 is two wavelengths of the noise flowing through the electric wire 20.

[0039] When the length of the electric wire 20 is two wavelengths of the noise, it can be seen that four amplitudes are generated with nodes at the center of the electric wire 20 and the midpoint between the center and the end of the electric wire 20, as shown in Fig. 7. Furthermore, it can be seen from the chart shown in Fig. 8 that the noise flowing through the electric wire 20 has radiation directivity in four directions.

[0040] As described above, when the length of the electric wire 20 is set to be longer than half the wavelength of the noise, it is found that a valley of radiation (noise) (a portion where the range affected by radiation becomes narrower) exists midway along the electric wire 20.

[0041] Therefore, if the length of the electric wire 20 is set to be longer than half the wavelength of the noise, the number of amplitudes that will be generated on the electric wire 20 can be determined by considering the relationship between the wavelength of the noise signal transmitted through the electric wire 20 and the length of the electric wire 20.

[0042] If it is possible to know how many amplitudes are generated on the electric wire 20, it becomes possible to know the radiation directivity of the noise.

[0043] Here, the inventors have thoroughly studied the layout of the electric wire 20 and found that when the length of the electric wire 20 is made longer than the wavelength of the noise, the direction in which the radiation (noise) valley exists can be controlled by bending the electric wire 20 in a predetermined manner.

[0044] It was then discovered that by bending the electric wire 20 and routing it while controlling the direction in which the radiation (noise) valley exists, it is possible to improve the degree of freedom in routing while suppressing the influence of noise flowing through the electric wire 20 on the distribution member 70.

[0045] The relationship between the bending method of the electric wire 20 and the change in the direction in which the radiation (noise) valley exists will be described below.

[0046] First, a case where the length of the electric wire 20 is one wavelength of the noise will be described.

[0047] When the length of the electric wire 20 is one wavelength of the noise, and the electric wire 20 is arranged so as to extend in a straight line as shown in Fig. 9, the radiation region R1 has a shape in which there is a valley of radiation (noise) that narrows in the X direction in the central part of the electric wire 20, as shown in Fig. 10. In other words, when the length of the electric wire 20 is one wavelength of the noise, in the electric wire 20 arranged in a straight line, the X direction is the direction in which noise radiation is reduced (the direction of null in the radiation characteristics of noise flowing through the electric wire portion 21), as shown in Fig. 11.

[0048] Here, when the length of the electric wire 20 is one wavelength of noise, the electric wire 20 is bent by 90 degrees around the midpoint 23 as a base point, as shown in Fig. 12. In this way, the radiation region R1 has a shape in which there is a radiation (noise) valley where the width narrows in a direction tilted by 45 degrees with respect to the X direction at the midpoint 23 of the electric wire 20, as shown in Fig. 13. That is, when the length of the electric wire 20 is one wavelength of noise, in the electric wire 20 arranged as shown in Fig. 12, the direction tilted by 45 degrees with respect to the X direction is the null direction in the radiation characteristics of noise flowing through the electric wire portion 21, as shown in Fig. 14.

[0049] Therefore, if the length of the electric wire 20 is one wavelength of the noise, and the electric wire 20 is bent 90 degrees from the midpoint 23 as the base point, it can be seen that the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 will be tilted by 45 degrees.

[0050] When the length of the electric wire 20 is one wavelength of the noise, the electric wire 20 is bent by α degrees in the Y direction with the midpoint 23 as the base point, as shown in Fig. 16. At this time, the bending angle α in the Y direction is set to 45 degrees.

[0051] In this way, the direction of null in the radiation characteristics of noise flowing through the electric wire portion 21 is inclined by 22.5 degrees with respect to the X direction, as shown in Fig. 18. That is, when the length of the electric wire 20 is one wavelength of the noise, in the electric wire 20 arranged in the state shown in Fig. 16, the direction of null in the radiation characteristics of noise flowing through the electric wire portion 21 is inclined by 22.5 degrees with respect to the X direction, as shown in Fig. 18.

[0052] Therefore, when the length of the electric wire 20 is one wavelength of the noise, if the electric wire 20 is bent by α degrees in the Y direction with the midpoint 23 as the base point, the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 will be inclined by α / 2 degrees in the X direction.

[0053] From this, it can be seen that by bending the electric wire 20 at a position (midpoint 23) corresponding to half the wavelength (one amplitude) of the noise, the directivity of the noise generated in the direction in which the amplitude occurs can be changed.

[0054] 17, the electric wire 20 is bent at 90 degrees in the Y direction from a first point 24 located on the one end side of the midpoint 23 as a base point. In this case, the distance A from one end of the electric wire 20 to the first point 24 is 250 mm, the distance B from the first point 24 to the midpoint 23 is 250 mm, and the distance C from the midpoint 23 to the other end of the electric wire 20 is 500 mm.

[0055] In this way, the direction of null in the radiation characteristics of noise flowing through the electric wire portion 21 is inclined at 22.5 degrees with respect to the X direction, as shown in Fig. 18. That is, when the length of the electric wire 20 is one wavelength of the noise, in the electric wire 20 arranged in the state shown in Fig. 17, the direction of null in the radiation characteristics of noise flowing through the electric wire portion 21 is inclined at 22.5 degrees with respect to the X direction, as shown in Fig. 18.

[0056] Therefore, when the length of the electric wire 20 is one wavelength of the noise, and the electric wire is bent 90 degrees from the first point 24 as the base point, the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 will be inclined by (A / A+B)×45 degrees with respect to the X direction. In this calculation formula, the distance from one end of the electric wire 20 to the first point 24 is A mm, the distance from the first point 24 to the midpoint 23 is B mm, and the distance from the midpoint 23 to the other end of the electric wire 20 is C mm. Note that A, B, and C satisfy the relational formula A+B=C.

[0057] From the above, when the length of the electric wire 20 is one wavelength of the noise, if the electric wire 20 is bent by α degrees from the first point 24 as the base point, the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 will be inclined by (A / A+B)×(α / 2) degrees with respect to the X direction.

[0058] From this, it can be understood that by determining the position (midpoint 23) corresponding to half the wavelength (one amplitude) of the noise and then bending the electric wire 20 at a predetermined position (first point 24), it becomes possible to control the directionality of the noise generated in the direction in which the amplitude is generated.

[0059] In this embodiment, when forming the electric wire routing structure 1 using the electric wire connector 10, the electric wire 20 is routed while controlling the noise directivity using the above-mentioned electric wire noise radiation directivity control method.

[0060] Specifically, the electric wire 20 is bent and routed around the electric wire distribution member 70 so that the electric wire distribution member 70 is disposed in the direction of a null in the radiation characteristics of noise flowing through the electric wire portion 21. This results in an electric wire routing structure 1 that can suppress the influence of noise flowing through the electric wire portion 21 on the electric wire distribution member 70 (see FIG. 15).

[0061] Note that Figure 15 illustrates an example of an electric wire routing structure 1 in which the length of the electric wire 20 is one wavelength of noise and the electric wire 20 is in the state shown in Figure 12, but the electric wire routing structure 1 can also be formed in a similar manner even if the electric wire 20 is in another bending state.

[0062] As described above, the method for controlling the radiation directivity of noise flowing through the electric wire portion 21 of the electric wire 20 includes the following steps.

[0063] A step of connecting a first connected body to one end of the electric wire portion 21 via a first impedance change point 2a.

[0064] A step of connecting a second connected body to the other end of the electric wire portion 21 via a second impedance change point 2b.

[0065] A step of bending the electric wire portion 21 to change the direction of the null in the radiation characteristics of noise flowing through the electric wire portion 21.

[0066] In addition, in this embodiment, the electric wire routing method, which is a method for routing the electric wire 20 around the electric power distribution member 70, includes the following steps.

[0067] A step of connecting a first connected body to one end of an electric wire portion of an electric wire via a first impedance change point.

[0068] A step of connecting a second connected body to the other end of the electric wire portion 21 via a second impedance change point 2b.

[0069] A step of bending the electric wire portion 21 to change the direction of the null in the radiation characteristics of noise flowing through the electric wire portion 21.

[0070] A process of routing the electric wire 20 so that the power distribution member 70 is positioned in the direction of the null in the radiation characteristics of noise flowing through the electric wire portion 21.

[0071] In this way, the electric wire arrangement method uses an electric wire noise radiation directivity control method to change the direction of the null in the radiation characteristics of the noise flowing through the electric wire section 21, and arranges the electric wire 20 so that the distribution member 70 is positioned in that direction.

[0072] The method for controlling radiation directivity of electric wire noise and the method for routing electric wires can perform the above steps in various orders.

[0073] In reality, it is rare that the length of the electric wire 20 is an integral multiple of the half wavelength of the noise. In such a case, the radiation directivity of the noise flowing through the electric wire portion 21 is controlled by estimating how many amplitudes of the noise flowing according to the length of the electric wire 20 will be carried on the electric wire 20 and bending the electric wire 20 based on this prediction.

[0074] In addition, by controlling the radiation directivity of the noise, the directivity at which the noise becomes a null point can be controlled, thereby reducing the impact of the noise on multiple electrical equipment, electrical wires, etc. (distribution members 70) installed around the electrical wire 20.

[0075] Next, a case where the length of the electric wire 20 is two wavelengths of noise will be described.

[0076] When the length of the electric wire 20 is two wavelengths of the noise, the electric wire 20 is bent in a zigzag pattern at the same angle on the same plane (XY plane) as shown in FIG.

[0077] Specifically, using the midpoint 23 as a base point, both portions are bent to one side in the X direction so that the angle at the midpoint 23 is 90 degrees. Also, using a first point 24 located on one end side of the midpoint 23 as a base point, the portion on the one end side of the first point 24 is bent to the other side in the X direction so that the angle at the first point 24 is 90 degrees. Then, using a second point 25 located on the other end side of the midpoint 23 as a base point, the portion on the other end side of the second point 25 is bent to the other side in the X direction so that the angle at the second point 25 is 90 degrees. The first point 24 is the midpoint between the midpoint 23 and one end of the electric wire 20, and the second point 25 is the midpoint between the midpoint 23 and the other end of the electric wire 20.

[0078] By doing so, four portions (each of the four equal portions) of the electric wire 20 are bent at 45 degrees with respect to the Y direction.

[0079] In this way, the electric wire 20 is bent at the points (midpoint 23, first point 24, second point 25) where a valley of radiation (noise) is formed when the length of the electric wire 20 is two wavelengths of the noise.

[0080] That is, the electric wire 20 is bent after determining the location where the radiation (noise) valley is formed, so as to achieve the state shown in FIG.

[0081] If the length of the electric wire 20 is one wavelength of the noise, and the electric wire 20 is placed in the state shown in Fig. 19, it will be basically the same as when the electric wire 20 is placed in a straight line as shown in Fig. 20. Therefore, it is not possible to control the directionality of the noise.

[0082] On the other hand, when the length of the electric wire 20 is two wavelengths of the noise, if the electric wire 20 is in the state shown in Fig. 19, there will be no inclination in the overall directivity of the noise, but the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 will be inclined at 45 degrees with respect to the X direction, as shown in Fig. 21. That is, when the length of the electric wire 20 is two wavelengths of the noise, in the electric wire 20 arranged in the state shown in Fig. 19, the direction inclined at 45 degrees with respect to the X direction will be the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21, as shown in Fig. 21.

[0083] Furthermore, when the length of the electric wire 20 is two wavelengths of the noise, the electric wire 20 is bent in a zigzag pattern at the same angle on the same plane (XY plane) as shown in FIG.

[0084] Specifically, using the midpoint 23 as a base point, both portions are bent to one side in the X direction so that the angle at the midpoint 23 is 120 degrees. Also, using a first point 24 located on one end side of the midpoint 23 as a base point, the portion on the one end side of the first point 24 is bent to the other side in the X direction so that the angle at the first point 24 is 120 degrees. Then, using a second point 25 located on the other end side of the midpoint 23 as a base point, the portion on the other end side of the second point 25 is bent to the other side in the X direction so that the angle at the second point 25 is 120 degrees. The first point 24 is the midpoint between the midpoint 23 and one end of the electric wire 20, and the second point 25 is the midpoint between the midpoint 23 and the other end of the electric wire 20.

[0085] By doing so, four portions (each of the four equal portions) of the electric wire 20 are bent at 30 degrees with respect to the Y direction.

[0086] In this way, even by making the state shown in Figure 22, the electric wire 20 is bent at the points (midpoint 23, first point 24, second point 25) where a valley of radiation (noise) is formed when the length of the electric wire 20 is two wavelengths of noise.

[0087] That is, the electric wire 20 is bent after determining the location where the radiation (noise) valley is formed, so as to be in the state shown in FIG.

[0088] 22, when the length of the electric wire 20 is two wavelengths of the noise, the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 is inclined by 30 degrees with respect to the X direction, as shown in Fig. 23. That is, when the length of the electric wire 20 is two wavelengths of the noise, in the electric wire 20 arranged in the state shown in Fig. 22, the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 is inclined by 30 degrees with respect to the X direction, as shown in Fig. 23.

[0089] From this, it can be understood that when the length of the electric wire 20 is two wavelengths of the noise, if the four parts of the electric wire 20 are bent in a zigzag state by α degrees relative to the Y direction, the direction of the null in the radiation characteristics of the noise flowing through the electric wire part 21 will be inclined by α degrees relative to the X direction.

[0090] From the above, when the length of the electric wire 20 is two wavelengths of the noise, by bending the electric wire 20 in a zigzag pattern at the same angle on the same plane to control the directivity so that the noise becomes a null point, it is possible to reduce the impact of the noise on the distribution member 70 installed around the electric wire 20.

[0091] In addition, the effect of noise on the distribution member 70 installed around the electric wire 20 can be reduced by a method similar to that described when the length of the electric wire 20 is one wavelength of the noise.

[0092] Furthermore, as shown in the model diagram in Figure 24, by bending the electric wire 20 by 90 degrees from the midpoint 23 as the base point when there is no metal ground plate 50, the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 can be tilted by 45 degrees.

[0093] From this, it can be understood that the wire connection body 10 does not need to be equipped with a ground plate 50, and that the direction of the null in the radiation characteristics of noise flowing through the wire portion 21 can be controlled by using a wire connection body 10 that does not have a ground plate 50.

[0094] 26, when the length of the electric wire 20 is two wavelengths of noise, when the electric wire 20 is bent in a zigzag pattern at the same angle (45 degrees) on the same plane, it is also possible to bend both sides in opposite directions in the X direction with the midpoint 23 as the base point. Even when the electric wire 20 is in the state shown in FIG. 26, it is possible to tilt the direction of null in the radiation characteristics of noise flowing through the electric wire portion 21 by 45 degrees, as shown in FIG.

[0095] From this, it can be understood that by bending the electric wire 20 in a zigzag pattern so that the protruding directions of the two peaks are opposite to the X direction, it is possible to control the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 when the length of the electric wire 20 is two wavelengths of the noise.

[0096] Therefore, when the length of the electric wire 20 is two wavelengths of the noise, the influence of the noise on the power distribution member 70 can be reduced by adjusting the wiring route based on the position of the power distribution member 70.

[0097] 28, an electric wire connection body 10 may be formed by connecting an electric wire 20 to first and second devices 30 and 40 via different types of electric wires (first and second connected bodies) 80 that are members separate from the electric wire 20. Furthermore, a connection site between one end of the electric wire 20 and the different type of electric wire 80 on that side may be a first impedance change point 2a, and a connection site between the other end of the electric wire 20 and the different type of electric wire 80 on the other side may be a second impedance change point 2b. The entire electric wire 20 may be configured as an electric wire portion 21 that can be bent to control the noise radiation directivity.

[0098] This makes it possible to ensure that the length of the electric wire 20 (electric wire portion 21) is an integer multiple of the half wavelength of the noise flowing through the electric wire 20 (electric wire portion 21) while ensuring the electric wire length necessary for routing the electric wire connection body 10. Furthermore, if the length of the electric wire 20 (electric wire portion 21) is an integer multiple of the half wavelength of the noise flowing through the electric wire 20 (electric wire portion 21), it becomes easier to control the radiation directivity of the noise.

[0099] It is not necessary to connect a different type of electric wire 80 to both ends of the electric wire 20, and it is also possible to connect a different type of electric wire 80 to only one end of the electric wire 20.

[0100] Alternatively, as shown in FIG. 29, the electric wire connection body 10 may be formed by forming the first impedance change point 2a and the second impedance change point 2b midway along the electric wire 20.

[0101] In such an electric wire connection body 10, the portion of the electric wire 20 between the first impedance change point 2a and the second impedance change point 2b becomes the electric wire portion 21 that is bent to control the noise radiation directivity. Also, the end 26 of the electric wire 20 on one side of the first impedance change point 2a becomes the first connected body, and the end 26 on the other side of the second impedance change point 2b becomes the second connected body.

[0102] This also makes it possible to ensure the wire length necessary for routing the wire connection body 10, while making the length of the wire portion 21 an integer multiple of the half wavelength of the noise flowing through the wire portion 21. Furthermore, if the length of the wire portion 21 is made an integer multiple of the half wavelength of the noise flowing through the wire portion 21, it becomes easier to control the noise radiation directivity.

[0103] It is not necessary to provide the first impedance change point 2a and the second impedance change point 2b in the middle of the electric wire 20, and either one of the first and second impedance change points 2a, 2b may be provided in the middle of the electric wire 20. In other words, it is possible to provide an electric wire connection body 10 in which at least one of the first connected body and the second connected body is the same member as the electric wire 20.

[0104] Furthermore, as a method for providing the first impedance change point 2a and the second impedance change point 2b in the middle of the electric wire 20, for example, a method of providing a high dielectric constant resin 90 in the middle of the electric wire 20 (at the portion where the impedance is to be changed) can be considered.

[0105] Specifically, when a single wire in which a core wire 20a is covered with a covering portion 20b is used as the electric wire 20, the impedance can be changed along the length of the electric wire 20 by providing a high dielectric constant resin 90 on the outer periphery of the covering portion 20b, as shown in Figure 30.

[0106] Furthermore, when the twisted pair wire 20c is used as the electric wire 20, the impedance can be changed along the electric wire 20 by providing a high dielectric constant resin 90 around the outer periphery of the twisted pair wire 20c, as shown in FIG. 31.

[0107] Furthermore, when a twisted pair wire 20c is used as the electric wire 20, it is also possible to untwist the twisted pair wire 20c and place a high-dielectric-constant resin 90 inside the untwisted twisted pair wire 20c, as shown in Fig. 32. This also makes it possible to change the impedance midway along the electric wire 20.

[0108] [Actions and Effects] The following describes the characteristic configurations and effects obtained by the electric wire connector, electric wire routing structure, electric wire noise radiation directivity control method, and electric wire routing method shown in the above embodiment and its modified examples.

[0109] The electric wire connection body 10 shown in the above embodiment and its modified examples includes an electric wire 20 having an electric wire portion 21, and a first connected body (a first device 30, a different type of electric wire 80, an end portion 26 of the electric wire 20) connected to one end of the electric wire portion 21 via a first impedance change point 2a. The electric wire connection body 10 also includes a second connected body (a second device 40, a different type of electric wire 80, an end portion of the electric wire 20) connected to the other end of the electric wire portion 21 via a second impedance change point 2b.

[0110] Here, the length of the electric wire portion 21 is longer than half the wavelength of the noise flowing through the electric wire portion 21. The electric wire portion 21 is bent so that the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 changes.

[0111] In this way, in the electric wire connection body 10 shown in the above embodiment and its modified example, the electric wire portion 21 is bent to change the direction of the null in the radiation characteristics of noise flowing through the electric wire portion 21.

[0112] In this way, the electric wire connection body 10 can be routed around the electric power distribution member 70 while bending the electric wire portion 21 to control the noise radiation directivity, thereby making it possible to prevent the electric power distribution member 70 from being affected by the noise flowing through the electric wire portion 21. In other words, by routing the electric wire connection body 10 around the electric power distribution member 70 while bending the electric wire portion 21 to control the noise radiation directivity, it becomes possible to implement noise countermeasures for the electric power distribution member 70, which is susceptible to the effects of noise, such as electrical components and electric wires.

[0113] In this way, with the electric wire connection body 10 shown in the above embodiment and its modified example, it is possible to implement noise countermeasures for the power distribution member 70 simply by bending and routing the electric wire portion 21. Therefore, it is possible to improve the degree of freedom in routing the electric wire connection body 10 while suppressing the influence of noise on the power distribution member 70.

[0114] Furthermore, at least one of the first connected body and the second connected body (first device 30, second device 40, different type of electric wire 80) may be a member separate from electric wire 20.

[0115] This makes it possible to more easily form the electric wire connection body 10 that has the impedance change points (first impedance change point 2a, second impedance change point 2b).

[0116] Furthermore, the separate member may be an electric wire 80 of a different type from the electric wire 20 .

[0117] This makes it possible to ensure the wire length necessary for routing the wire connection body 10, while making the length of the wire portion 21 an integer multiple of the half wavelength of the noise flowing through the wire portion 21. In this way, if the length of the wire portion 21 is made an integer multiple of the half wavelength of the noise flowing through the wire portion 21, it becomes easier to control the noise radiation directivity.

[0118] Furthermore, at least one of the first impedance change point 2a and the second impedance change point 2b may be formed midway along the electric wire 20.

[0119] This also makes it possible to ensure the length of the electric wire portion 21 to be an integer multiple of half the wavelength of the noise flowing through the electric wire portion 21 while ensuring the electric wire length required for routing the electric wire connector 10.

[0120] The electric wire routing structure 1 shown in the above embodiment and its modified example includes an electric wire connection body 10. The electric wire connection body 10 includes an electric wire 20 having an electric wire portion 21, and a first connected body (a first device 30, a different type of electric wire 80, an end portion 26 of the electric wire 20) connected to one end of the electric wire portion 21 via a first impedance change point 2a. The electric wire connection body 10 also includes a second connected body (a second device 40, a different type of electric wire 80, an end portion 26 of the electric wire 20) connected to the other end of the electric wire portion 21 via a second impedance change point 2b.

[0121] Here, the length of the electric wire portion 21 is longer than half the wavelength of the noise flowing through the electric wire portion 21. In addition, the electric wire portion 21 is bent so that the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 changes.

[0122] The power distribution member 70 is disposed in the direction of the null in the radiation characteristics of the noise flowing through the electric wire portion 21 .

[0123] In this way, it is possible to prevent the power distribution member 70 from being affected by noise flowing through the electric wire portion 21.

[0124] The method for controlling radiation directivity of electric wire noise shown in the above embodiment and its modified example is a method for controlling radiation directivity of noise flowing in the electric wire portion 21 of the electric wire 20.

[0125] This method for controlling the radiation directivity of electric wire noise includes a step of connecting a first connected object (a first device 30, a different type of electric wire 80, or an end 26 of an electric wire 20) to one end of an electric wire portion 21 via a first impedance change point 2a.

[0126] The method for controlling the radiation directivity of electric wire noise also includes a step of connecting a second connected object (a second device 40, a different type of electric wire 80, or the end 26 of the electric wire 20) to the other end of the electric wire portion 21 via a second impedance change point 2b.

[0127] The method for controlling radiation directivity of electric wire noise includes a step of bending the electric wire portion 21 to change the direction of null in the radiation characteristics of noise flowing through the electric wire portion 21.

[0128] This makes it possible to more easily control the radiation directivity of noise flowing through the electric wire portion 21 of the electric wire 20.

[0129] Furthermore, by using such a method to control the radiation directivity of noise flowing through the electric wire portion 21, it becomes possible to improve the freedom of routing of the electric wire connector 10 while taking noise countermeasures against the electric distribution components 70, such as electrical equipment and electric wires, which are susceptible to noise.

[0130] The electric wire routing method shown in the above embodiment and its modified example is a method for routing the electric wire 20 around the electric power distribution member 70.

[0131] This electric wire routing method includes a step of connecting a first connected object (a first device 30, a different type of electric wire 80, or an end 26 of the electric wire 20) to one end of the electric wire portion 21 of the electric wire 20 via a first impedance change point 2a.

[0132] The electric wire routing method also includes a step of connecting a second connected body (a second device 40, a different type of electric wire 80, or the end 26 of the electric wire 20) to the other end of the electric wire portion 21 via a second impedance change point 2b.

[0133] Furthermore, the electric wire routing method includes a step of bending the electric wire portion 21 to change the direction of null in the radiation characteristics of noise flowing through the electric wire portion 21.

[0134] The electric wire routing method includes a step of routing the electric wire 20 so that the power distribution member 70 is located in a direction of null in the radiation characteristics of noise flowing through the electric wire portion 21.

[0135] By routing the electric wire 20 in this manner, it becomes easier to obtain an electric wire routing structure 1 that can prevent the distribution member 70 from being affected by noise flowing through the electric wire portion 21.

[0136] [others] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.

[0137] For example, the configurations shown in the above-described embodiment and its modified examples can be combined in various ways.

[0138] Furthermore, in the above embodiment and its modified examples, the length of the electric wire portion 21 is illustrated as an integer multiple of the half wavelength of the noise flowing through the electric wire portion 21, but the length of the electric wire portion 21 may be various lengths as long as it is longer than the half wavelength of the noise flowing through the electric wire portion 21. For example, the length of the electric wire portion 21 may be 1.1 times or 2.4 times the half wavelength of the noise flowing through the electric wire portion 21. In this way, when the length of the electric wire portion 21 is not an integer multiple of the half wavelength of the noise flowing through the electric wire portion 21, the position where the noise valley is formed is identified, and then the electric wire portion is bent to control the noise radiation directivity.

[0139] It is also possible to change the specifications of the electric wires, power distribution components, and other details (shape, size, layout, etc.) as appropriate. [Explanation of symbols]

[0140] 1 Wire routing structure 2a First impedance change point 2b Second impedance change point 10 Electrical wire connector 20 Electric wire 21 Electrical Wire Section 26 End (first and second connected bodies) 30 First device (first connected body) 40 Second device (second connected body) 70 Power distribution components 80 Different types of electric wires (first and second connected bodies)

Claims

1. an electric wire having an electric wire portion; a first connected body connected to one end of the electric wire portion via a first impedance change point; a second connected body connected to the other end of the electric wire portion via a second impedance change point; Equipped with The length of the electric wire portion is longer than half the wavelength of the noise flowing through the electric wire portion, the electric wire portion is bent so as to change a direction of null in the radiation characteristics of noise flowing through the electric wire portion; Wire connector.

2. At least one of the first connected body and the second connected body is a member separate from the electric wire. The electric wire connector according to claim 1 .

3. The other member is a different type of electric wire from the electric wire. The electric wire connector according to claim 2 .

4. At least one of the first impedance change point and the second impedance change point is formed midway along the electric wire. The electric wire connector according to claim 1 .

5. an electric wire having an electric wire portion; a first connected body connected to one end of the electric wire portion via a first impedance change point; a second connected body connected to the other end of the electric wire portion via a second impedance change point; a wire connector having The length of the electric wire portion is longer than half the wavelength of the noise flowing through the electric wire portion, the electric wire portion is bent so as to change a direction of null in a radiation characteristic of noise flowing through the electric wire portion, a power distribution member is arranged in a direction of a null in the radiation characteristics of noise flowing through the electric wire portion; Wire routing structure.

6. A method for controlling radiation directivity of electric wire noise, which controls radiation directivity of noise flowing in an electric wire portion of an electric wire, comprising: connecting a first connected object to one end of the electric wire portion via a first impedance change point; connecting a second connected object to the other end of the electric wire portion via a second impedance change point; bending the electric wire portion to change a direction of null in the radiation characteristics of noise flowing through the electric wire portion; Equipped with A method for controlling the radiation directivity of power line noise.

7. An electric wire routing method for routing an electric wire around a power distribution member, comprising: connecting a first connected object to one end of the electric wire portion of the electric wire via a first impedance change point; connecting a second connected object to the other end of the electric wire portion via a second impedance change point; bending the electric wire portion to change a direction of null in the radiation characteristics of noise flowing through the electric wire portion; a step of routing the electric wire so that the power distribution member is located in a direction of a null in the radiation characteristics of noise flowing through the electric wire portion; Equipped with Wire wiring method.

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