CN109408858B - Cable modeling method - Google Patents
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- CN109408858B CN109408858B CN201811030631.2A CN201811030631A CN109408858B CN 109408858 B CN109408858 B CN 109408858B CN 201811030631 A CN201811030631 A CN 201811030631A CN 109408858 B CN109408858 B CN 109408858B
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Abstract
The invention discloses a cable modeling method, which comprises the following steps: acquiring a connection mode of the cables and determining the number of the cables in the cable bundle; establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables; the distance between the center point of the section of each cable and the origin of coordinates of the coordinate system is equal, and the included angle formed between the center points of the sections of any two adjacent cables is equal; and establishing a layout model of the cable section according to the coordinate value of the central point of each cable section. The cable modeling method provided by the embodiment of the invention can effectively reduce the difficulty of cable modeling, thereby simply and efficiently modeling the cable.
Description
Technical Field
The invention relates to the technical field of modeling, in particular to a cable modeling method.
Background
The cable is an important link for transmitting information and energy between electronic devices, and particularly occupies a great proportion in electromechanical products with complex structures. In recent years, electromagnetic compatibility simulation for modeling, layout and laying of cables in the fields of aerospace, automobiles, ships and the like has gradually become a research hotspot.
In the prior art, the existing cable modeling method is mainly based on discrete control point cable modeling, elastic rod mechanics model cable modeling, energy optimization cable modeling and the like, only the routing layout path of the cable is modeled, the use and the type of the cable are not elaborated, the length of the cable is usually far larger than the diameter of the cable, the central line of the cable is usually taken as the cable layout laying path in engineering, and the cable cannot be modeled really and efficiently.
Disclosure of Invention
The embodiment of the invention provides a cable modeling method, which aims to solve the technical problem that the existing cable modeling method cannot really and efficiently model a cable, so that the difficulty of cable modeling is reduced, and the cable is simply and efficiently modeled.
In order to solve the above technical problem, an embodiment of the present invention provides a cable modeling method, including the following steps:
acquiring a connection mode of the cables and determining the number of the cables in the cable bundle;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables; the distance between the center point of the section of each cable and the origin of coordinates of the coordinate system is equal, and the included angle formed between the center points of the sections of any two adjacent cables is equal;
and establishing a layout model of the cable section according to the coordinate value of the central point of each cable section.
Preferably, the method further comprises:
when the connection mode of the cables is a star connection mode, determining that the number of the cables in the cable harness is 4; wherein, the cable in the pencil is respectively: phase line A, phase line B, phase line C and ground line N;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the ground wire N are (0, 0), the coordinates of the central point of the cable section of the phase wire A are (X1, Y1), the coordinates of the central point of the cable section of the phase wire B are (X2, Y2), and the coordinates of the central point of the cable section of the phase wire C are (X3, Y3);
the distance between the coordinate of the central point of the cable section of the phase line A, the coordinate of the central point of the cable section of the phase line B, the coordinate of the central point of the cable section of the phase line C and the coordinate of the central point of the cable section of the ground line C is equal, and the included angle formed between any two adjacent central points of the cable sections is equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
Preferably, the method further comprises:
when the connection mode of the cables is a triangular connection mode, determining the number of the cables in the wire harness to be 3; wherein, the cable in the pencil is respectively: phase lines A, B and C;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the phase line A are (X1, Y1), the coordinates of the central point of the cable section of the phase line B are (X2, Y2), and the coordinates of the central point of the cable section of the phase line C are (X3, Y3);
the coordinate of the central point of the cable section of the phase line A, the coordinate of the central point of the cable section of the phase line B and the coordinate of the central point of the cable section of the phase line C are equal in distance from the origin of coordinates of the coordinate system, and included angles formed between any two adjacent central points of the cable sections are equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
Preferably, the method further comprises:
when the connection mode of the cables is a single-phase cross-flow connection mode, determining that the number of the cables in the cable harness is 2; wherein, the cable in the pencil is respectively: a phase line A and a ground line N;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the phase line A are (X1, 0), the coordinates of the central point of the cable section of the ground line N are (0, Y4), and X1 is equal to the absolute value of Y4;
the distance between the coordinate of the central point of the cable section of the phase line A, the coordinate of the central point of the cable section of the ground line N and the coordinate origin of the coordinate system is equal, and the included angle formed between any two adjacent central points of the cable sections is equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
Preferably, the method further comprises:
when the connection mode of the cables is a direct-current cable connection mode, determining that the number of the cables in the wire harness is 2; wherein, the cable in the pencil is respectively: a positive pressure direct current line and a negative pressure direct current line;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the positive-pressure direct current line are (X1, 0), the coordinates of the central point of the cable section of the negative-pressure direct current line are (0, Y4), and X1 is equal to the absolute value of Y4;
the coordinate of the central point of the cable section of the positive-pressure straight flow line, the coordinate of the central point of the cable section of the negative-pressure straight flow line and the distance of the coordinate origin of the coordinate system are equal, and the included angle formed between any two adjacent central points of the cable sections is equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
Preferably, the method further comprises:
when the connection mode of the cables is a direct-current cable connection mode, determining that the number of the cables in the wire harness is 2; wherein, the cable in the pencil is respectively: a positive voltage direct current line and a ground line;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the positive voltage direct current line are (X1, 0), the coordinates of the central point of the cable section of the ground wire are (0, Y4), and X1 is equal to the absolute value of Y4;
the distance between the coordinate of the central point of the cable section of the positive pressure straight line and the coordinate of the central point of the cable section of the ground wire and the coordinate origin of the coordinate system is equal, and the included angle formed between any two adjacent central points of the cable sections is equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a cable modeling method, which comprises the following steps: acquiring a connection mode of the cables and determining the number of the cables in the cable bundle; establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables; the distance between the center point of the section of each cable and the origin of coordinates of the coordinate system is equal, and the included angle formed between the center points of the sections of any two adjacent cables is equal; and establishing a layout model of the cable section according to the coordinate value of the central point of each cable section. The modeling is carried out according to the cable sections of the alternating current power cable and the direct current power cable, so that the difficulty of cable modeling can be effectively reduced, and the cable can be simply and efficiently modeled.
Drawings
Fig. 1 is a schematic flow chart of a cable modeling method according to a first embodiment of the present invention;
FIG. 2 is a Y-connection diagram of a cable modeling method according to a second embodiment of the invention;
FIG. 3 is a schematic Y-wiring diagram of a cable modeling method according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of Y-type wiring-cable modeling of the cable modeling method according to the second embodiment of the invention;
FIG. 5 is a schematic diagram of a load connection circuit of a 230V, 500Hz three-phase AC power cable of the cable modeling method according to the second embodiment of the present invention;
FIG. 6 is a schematic diagram of a delta connection of a cable modeling method according to a third embodiment of the invention;
fig. 7 is a schematic diagram of a delta-shaped wiring-cable modeling of a cable modeling method according to a third embodiment of the invention;
fig. 8 is a schematic diagram of a load circuit of a power cable in a 220V and 50Hz three-phase ac delta connection method according to a cable modeling method in a third embodiment of the present invention;
fig. 9 is a schematic diagram of modeling a single-phase alternating current cable according to the cable modeling method of the fourth embodiment of the present invention;
FIG. 10 is a schematic diagram of a 115V, 800Hz single-phase AC power cable load circuit of the cable modeling method according to the fourth embodiment of the invention;
fig. 11 is a schematic diagram of dc cable modeling according to the cable modeling method in the fifth embodiment of the present invention;
FIG. 12 is a schematic diagram of a +/-270V DC power supply cable load circuit of the cable modeling method according to the fifth embodiment of the invention;
fig. 13 is a schematic diagram of dc cable modeling according to the cable modeling method according to the sixth embodiment of the present invention;
fig. 14 is a schematic diagram of a cable load circuit of a 28V dc power supply according to the cable modeling method in the sixth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment of the present invention:
referring to fig. 1, a preferred embodiment of the present invention provides a cable modeling method, including the following steps:
s101, acquiring a connection mode of cables and determining the number of the cables in a cable bundle;
s102, establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables; the distance between the center point of the section of each cable and the origin of coordinates of the coordinate system is equal, and the included angle formed between the center points of the sections of any two adjacent cables is equal;
s103, establishing a layout model of the cable section according to the coordinate value of the central point of each cable section.
In the embodiment of the invention, the modeling is carried out according to the cable sections of the AC and DC power cables, so that the difficulty of cable modeling can be effectively reduced, and the cable can be simply and efficiently modeled.
Second embodiment of the invention:
in an embodiment of the present invention, the method further comprises:
when the connection mode of the cables is a star connection mode, determining that the number of the cables in the cable harness is 4; wherein, the cable in the pencil is respectively: the phase line A, the phase line B, the phase line C and the ground line N;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the ground wire N are (0, 0), the coordinates of the central point of the cable section of the phase wire A are (X1, Y1), the coordinates of the central point of the cable section of the phase wire B are (X2, Y2), and the coordinates of the central point of the cable section of the phase wire C are (X3, Y3);
the distance between the coordinate of the central point of the cable section of the phase line A, the coordinate of the central point of the cable section of the phase line B, the coordinate of the central point of the cable section of the phase line C and the coordinate of the central point of the cable section of the ground line C is equal, and the included angle formed between any two adjacent central points of the cable sections is equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
For example, referring to fig. 2 to 5, a 230V and 500Hz three-phase ac Y-type power cable cross section is modeled as follows:
when the power cables are Y-connected, the effective value of the line voltage is equal to the effective value of the phase voltage
And the phase difference of the three-phase line voltage is 120 degrees, and a Y-shaped connection schematic diagram is shown in figure 2.
As can be seen from fig. 2, the 230V and 500Hz three-phase ac Y-type power cable is a wire harness consisting of four wires including three phase wires and a zero wire. The cross section of the cable is arranged in a Y-shaped connection mode, namely an included angle between two single wires is 120 degrees, the diameter of each single wire is 2, and the schematic cross section is shown in figure 3.
As can be seen from fig. 3, a circle with the ground line N as a center in fig. 3 is an overall cross section of the cable, and the radius r =1 of the cross section of the cable is not distinguished between the core and the insulating layer. Assume that the coordinates of the ground line N point are (0, 0). Therefore, the coordinates of the point of the phase line a are (0, 2), equal to the central coordinates of the section of the phase line a. And so on, the ordinate of the phase line B point is-1, and the abscissa thereof is
And points B and C are respectively the section center coordinates of the phase line B and the phase line C. The coordinates of the center points of the cross sections of the phase lines and the zero lines are shown in the table 1.
TABLE 1Y-connection cable section coordinate
According to the coordinate positions of the cross section centers of the phase line and the zero line determined in the table 1, the coordinates of the centers of the phase line and the zero line are input into professional electromagnetic simulation modeling software, and the model corresponds to the coordinate values in the table one by one, so that the layout of the cross section of the power cable is determined, as shown in the attached figure 4.
Third embodiment of the invention:
in an embodiment of the present invention, the method further includes:
when the connection mode of the cables is a triangular connection mode, determining the number of the cables in the wire harness to be 3; wherein, the cable in the pencil is respectively: phase lines A, B and C;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the phase line A are (X1, Y1), the coordinates of the central point of the cable section of the phase line B are (X2, Y2), and the coordinates of the central point of the cable section of the phase line C are (X3, Y3);
the coordinate of the central point of the cable section of the phase line A, the coordinate of the central point of the cable section of the phase line B and the coordinate of the central point of the cable section of the phase line C are equal in distance from the origin of coordinates of the coordinate system, and included angles formed between any two adjacent central points of the cable sections are equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
For example, please refer to fig. 6 to 8, the cross section of the 220V and 50Hz three-phase ac Δ -type power cable is modeled as follows:
when the power cables are connected in a delta shape, all phase power supplies or loads are sequentially connected end to end, each connected point is led out to serve as three phase lines of three-phase power, the effective value of line voltage is equal to the effective value of phase voltage, and the delta connection mode is shown in fig. 6.
As can be seen from fig. 6, the 220V and 50Hz three-phase ac delta power cable is a wiring harness consisting of three phase lines. The cross section of the cable is arranged in a delta connection layout mode, the centers of the cross sections of phase lines of the power cable which is convenient to calculate the delta connection are respectively positioned at three vertexes of a regular triangle, and the coordinates of the center points of the cross sections of the phase lines in the delta connection are shown in a table 2 through calculation.
TABLE 2 Delta-shaped connection cable section center coordinate setting
The position of the center point of each phase line is determined according to the coordinates in table 2, and the layout of the cable cross section is determined, as shown in fig. 7.
The phase line of the delta connection power supply cable is a single line with the same specification as that of the Y connection power supply cable, and the single-phase power supply cable and the direct-current power supply cable are also single lines with the same specification.
Similarly, a load circuit of a 220V and 50Hz three-phase ac delta connection power cable is shown in fig. 8.
The fourth embodiment of the present invention:
in an embodiment of the present invention, the method further includes:
when the connection mode of the cables is a single-phase cross-flow connection mode, determining that the number of the cables in the cable harness is 2; wherein, the cable in the pencil is respectively: a phase line A and a ground line N;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the phase line A are (X1, 0), the coordinates of the central point of the cable section of the ground line N are (0, Y4), and X1 is equal to the absolute value of Y4;
the coordinate of the central point of the cable section of the phase line A, the coordinate of the central point of the cable section of the ground line N and the distance between the coordinate origin of the coordinate system are equal, and the included angle formed between the central points of the cable sections of any two adjacent cables is equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
For example, please refer to fig. 9 to 10, the single-phase ac power cable section with 115V and 800Hz is modeled as follows:
the single-phase alternating current cable of 115V and 800Hz consists of two cables, namely a phase line cable and a ground line cable, which form a wiring harness. The layout of the cable cross-section is set up with the coordinates shown in table 3.
TABLE 3 115V, 800Hz Single-phase AC Cable Cross-section coordinate settings
The position of the centre points of the phase and ground wires is determined from the coordinates in table 3 and the layout of the cross section of the cable is determined as shown in figure 9.
The fourth embodiment of the present invention:
in an embodiment of the present invention, the method further comprises:
when the connection mode of the cables is a direct-current cable connection mode, determining that the number of the cables in the wire harness is 2; wherein, the cable in the pencil is respectively: a positive pressure direct current line and a negative pressure direct current line;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the positive-pressure direct current line are (X1, 0), the coordinates of the central point of the cable section of the negative-pressure direct current line are (0, Y4), and X1 is equal to the absolute value of Y4;
the distance between the coordinate of the central point of the cable section of the positive-pressure direct current line and the coordinate of the central point of the cable section of the negative-pressure direct current line and the coordinate origin of the coordinate system is equal, and the included angle formed between any two adjacent central points of the cable sections is equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
For example, please refer to fig. 11 to 12, the dc cable section of ± 270V is modeled as follows:
the +/-270V direct current cable consists of two cables, wherein one cable is a +270V direct current cable, and the other cable is a-270V direct current cable. The coordinate position of the center point of the cable is shown in table 3. Based on the coordinate values in table 3, the positions of the two dc cables are determined, and the layout of the cable cross-section is determined, as shown in fig. 11.
Similarly, a ± 270V dc power cable load circuit is shown in fig. 12.
Fifth embodiment of the invention:
in an embodiment of the present invention, the method further comprises:
when the connection mode of the cables is a direct-current cable connection mode, determining that the number of the cables in the wire harness is 2; wherein, the cable in the pencil is respectively: a positive voltage direct current line and a ground line;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the positive voltage direct current line are (X1, 0), the coordinates of the central point of the cable section of the ground wire are (0, Y4), and X1 is equal to the absolute value of Y4;
the distance between the coordinate of the central point of the cable section of the positive pressure straight line and the coordinate of the central point of the cable section of the ground wire and the coordinate origin of the coordinate system is equal, and the included angle formed between any two adjacent central points of the cable sections is equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
For example, please refer to fig. 13 to 14, a 28V dc cable section is modeled as follows:
the 28V direct current cable consists of two cables, one is a 28V direct current cable, and the other is a ground wire. The coordinate position of the center point of the cable is shown in table 3. From the coordinate values in table 3, it is possible to determine the positions of the dc cable and the ground wire, and to determine the layout of the cable section, as shown in fig. 13.
Similarly, a 28V dc power cable load circuit is shown in fig. 14.
To sum up, an embodiment of the present invention provides a cable modeling method, including the steps of: acquiring a connection mode of the cables and determining the number of the cables in the cable bundle; establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables; the distance between the center point of the section of each cable and the origin of coordinates of the coordinate system is equal, and the included angle formed between the center points of the sections of any two adjacent cables is equal; and establishing a layout model of the cable section according to the coordinate value of the central point of each cable section. The modeling is carried out according to the cable sections of the alternating current power cable and the direct current power cable, so that the difficulty of cable modeling can be effectively reduced, and the cable can be simply and efficiently modeled.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (4)
1. A cable modeling method, comprising the steps of:
acquiring a connection mode of the cables and determining the number of the cables in the cable bundle; the cable connection modes comprise a star connection mode, a triangular connection mode, a single-phase alternating current connection mode and a direct current cable connection mode;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables; the distance between the center point of the section of each cable and the origin of coordinates of the coordinate system is equal, and the included angle formed between the center points of the sections of any two adjacent cables is equal;
if the cable connection mode is a single-phase alternating current connection mode, the cables in the wire bundle are a phase wire A and a ground wire N; the coordinates of the central point of the cable section of the phase line A are (X1, 0), the coordinates of the central point of the cable section of the ground line N are (0, Y4), and X1 is equal to the absolute value of Y4;
if the cable connection mode is a direct current cable connection mode, the cables in the cable bundle are a positive voltage direct current line and a negative voltage direct current line or a positive voltage direct current line and a ground line; the coordinates of the central point of the cable section of the positive pressure direct current line are (X1, 0), the coordinates of the central point of the cable section of the negative pressure direct current line or the ground line are (0, Y4), and X1 is equal to the absolute value of Y4;
and establishing a layout model of the cable section according to the coordinate value of the central point of each cable section.
2. The cable modeling method of claim 1, the method further comprising:
when the connection mode of the cables is a star connection mode, determining that the number of the cables in the cable harness is 4; wherein, the cable in the pencil is respectively: phase line A, phase line B, phase line C and ground line N;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the ground wire N are (0, 0), the coordinates of the central point of the cable section of the phase wire A are (X1, Y1), the coordinates of the central point of the cable section of the phase wire B are (X2, Y2), and the coordinates of the central point of the cable section of the phase wire C are (X3, Y3);
the distance between the coordinate of the central point of the cable section of the phase line A, the coordinate of the central point of the cable section of the phase line B, the coordinate of the central point of the cable section of the phase line C and the coordinate of the central point of the cable section of the ground line N is equal, and the included angle formed between any two adjacent central points of the cable sections is equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
3. The cable modeling method of claim 1, the method further comprising:
when the connection mode of the cables is a triangular connection mode, determining the number of the cables in the wire harness to be 3; wherein, the cable in the pencil is respectively: phase lines A, B and C;
establishing a coordinate system and determining the coordinate value of the central point of the section of each cable according to the number of the cables;
the coordinates of the central point of the cable section of the phase line A are (X1, Y1), the coordinates of the central point of the cable section of the phase line B are (X2, Y2), and the coordinates of the central point of the cable section of the phase line C are (X3, Y3);
the coordinate of the central point of the cable section of the phase line A, the coordinate of the central point of the cable section of the phase line B and the coordinate of the central point of the cable section of the phase line C are equal in distance from the origin of coordinates of the coordinate system, and included angles formed between any two adjacent central points of the cable sections are equal;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
4. The cable modeling method of claim 1, the method further comprising:
when the connection mode of the cables is a single-phase cross-flow connection mode or a direct-current cable connection mode, determining that the number of the cables in the cable harness is 2;
and establishing a layout model of the cable section by using electromagnetic simulation modeling software according to the coordinate value of the central point of each cable section.
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| KR20140081066A (en) * | 2012-12-21 | 2014-07-01 | 현대중공업 주식회사 | Auto modeling method of cable gland |
| CN105683971A (en) * | 2013-10-28 | 2016-06-15 | 雷比诺电力系统 | Method for characterising a strand of electric cables |
| CN104636555A (en) * | 2015-02-06 | 2015-05-20 | 华南理工大学 | 10kV three-core cable temperature field model establishing method |
| CN107330185A (en) * | 2017-06-29 | 2017-11-07 | 北京理工大学 | The acquisition methods and device of the discrete point coordinates of cable |
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