JP2023154340A - Control device - Google Patents

Abstract

To provide a control device capable of reducing the influence of electromagnetic noise on an apparatus in which a power line and a ground wire are connected to different locations.SOLUTION: A control device 10 includes: a power line connection section 14 to which apparatus-side power lines 30 and 32 coupled to an apparatus 50 are connected; a ground wire connection section 16 to which an apparatus-side ground wire 34 coupled to the apparatus 50 is connected; a twisted wire connection section 18 which is coupled to a power source and to which a twisted wire 36 formed by twisting a power line 38 and a ground wire 40 is connected; a communication line connection section 20 to which a communication line 42 for communicating a signal related to power supply is connected; and a power supply control section 22 that supplies power to the apparatus 50 based on the signal received from the communication line 42.SELECTED DRAWING: Figure 1

Description

The present invention relates to a control device.

Patent Document 1 discloses a wire harness in which an electromagnetic noise countermeasure section is formed by twisting one power supply line and one ground wire, and the influence of electromagnetic noise is reduced by this electromagnetic noise countermeasure section. .

Japanese Patent Application Publication No. 2007-250286

However, the wire harness described in Patent Document 1 can only be used in a structure in which one power wire and one ground wire are connected to the same part, and it can be used only in a structure such as an in-vehicle ECU (Electronic Control Unit), etc. There is room for improvement if this method is applied to a configuration in which the power line connection part and the ground line connection part are provided at different locations, such as in-vehicle equipment.

An object of the present invention is to obtain a control device that can reduce the influence of electromagnetic noise in equipment in which a power line and a ground line are connected to different locations.

The control device according to claim 1 includes: a power line connection portion to which a device side power line connected to the device is connected; a ground line connection portion to which the device side ground wire connected to the device is connected; and a power source. a twisted wire connection section to which a twisted wire formed by twisting a power supply line and a ground wire is connected; a communication line connection section to which a communication line for communicating signals related to power supply is connected; and a power supply control unit that supplies power to the device based on the signal received from the communication line.

In the control device according to the first aspect, the device side power line is connected to the power line connection portion, and the device side ground wire is connected to the ground line connection portion. The control device also includes a twist wire connection section to which a twisted wire made by twisting the power supply wire and the ground wire is connected, and the twist wire connected to the twist wire connection section connects the external power supply and the control device. are concatenated. Further, the control device includes a communication line connection section to which one end of the communication line is connected, and a power supply control section that supplies power to the device based on a signal received from the communication line. In this way, by providing the twisted wire connection portion to which the twisted wire is connected, the influence of electromagnetic noise can be reduced without twisting the device-side power supply line and the device-side ground wire. Note that the "twisted wire" herein is not limited to a wire in which a power wire and a ground wire are twisted together, but also includes a wire in which one of the power wire and the ground wire is wrapped around the other so that they are brought into close contact with each other.

As described above, according to the control device according to the present invention, it is possible to reduce the influence of electromagnetic noise in a device in which the power line and the ground line are connected to different locations.

FIG. 2 is a schematic diagram showing a peripheral wiring structure of a control device according to an embodiment. FIG. 2 is a schematic diagram showing a hardware configuration of a power supply control unit in an embodiment. FIG. 3 is a schematic diagram showing a wiring structure in a first comparative example. FIG. 7 is a schematic diagram showing a wiring structure in a second comparative example.

A control device 10 according to an embodiment will be described with reference to the drawings. Note that the control device 10 of this embodiment is mounted on a moving vehicle (not shown) as a spacecraft, and is electrically connected to an ECU (Electronic Control Unit) 50 as an example of a device. For example, the ECU 50 is a power control unit, a battery ECU, and the like. Although not shown, the ECU 50 is electrically connected to switches, actuators, and the like, and controls the switches, actuators, and the like.

As shown in FIG. 1, the control device 10 according to the present embodiment is arranged near the ECU 50, and includes a main body section 12, a power line connection section 14, a ground wire connection section 16, a twisted wire connection section 18, a communication It is configured to include a line connection section 20 and a power supply control section 22.

The main body portion 12 constitutes the outer shell of the control device 10, and is formed into a substantially rectangular box shape. Furthermore, a power supply control section 22, which will be described later, is provided inside the main body section 12.

A power line connection portion 14 is provided on the outer surface of the main body portion 12 . The power line connecting portion 14 is formed on the surface of the main body 12 facing the ECU 50, and one end of the ignition power line 30 as the device side power line is connected to the power line connecting portion 14. Further, one end of a constant power line 32 as a device-side power line is connected to the power line connecting portion 14 .

The ignition power line 30 is a power line for starting the supply of current when starting the spacecraft. One end of the ignition power line 30 is connected to the power line connection part 14, and the other end of the ignition power line 30 is connected to the power line connection part 14. It is connected to the first connection section 52 of the ECU 50.

The constant power line 32 is a power line that can constantly supply current even when the spacecraft is stopped. One end of the constant power line 32 is connected to the power line connection part 14, and the constant power line 32 The other end is connected to the first connection part 52 of the ECU 50. In this way, the control device 10 and the ECU 50 are connected by the ignition power line 30 and the constant power line 32.

A ground wire connection portion 16 is provided on the outer surface of the main body portion 12 . The ground wire connection portion 16 is formed on the surface of the main body portion 12 facing the ECU 50, and one end of the equipment side ground wire 34 is connected to this ground wire connection portion 16. The device-side ground wire 34 is a grounding wire, and the other end of the device-side ground wire 34 is connected to the second connection portion 54 of the ECU 50. In this way, the control device 10 and the ECU 50 are connected by the device-side ground wire 34.

A twisted wire connection portion 18 is provided on the outer surface of the main body portion 12 . The twist wire connection portion 18 is formed on a different surface from the power line connection portion 14 and the ground wire connection portion 16. In this embodiment, as an example, the twist wire connection portion 18 is formed on the surface of the main body portion 12 opposite to the surface on which the power line connection portion 14 and the ground wire connection portion 16 are formed.

One end of the twisted wire 36 is connected to the twisted wire connection portion 18 . The twisted wire 36 is formed by twisting a power supply wire 38 and a ground wire 40. Although a gap is shown in FIG. 1 between the power wire 38 and the ground wire 40 for convenience of explanation, in reality, the power wire 38 and the ground wire 40 are twisted together in close contact with each other to form a twisted wire. 36 are formed. Further, the twisted wire 36 may be formed by spirally winding the ground wire 40 around the power supply wire 38 arranged in a straight line. Conversely, the twisted wire 36 may be formed by spirally winding the power supply wire 38 around the ground wire 40 arranged in a straight line.

The other end of the twisted wire 36 is connected to a battery 72 (see FIG. 2), not shown, which is an example of a power source provided outside the control device 10. Therefore, the control device 10 and the battery 72 are connected by the twisted wire 36.

Here, since the twisted wire 36 is formed by bringing the power wire 38 and the ground wire 40 into close contact with each other, the ranges of the magnetic fields generated from the power wire 38 and the ground wire 40 respectively overlap. Therefore, the range of the magnetic field generated from the twisted wire 36 is smaller than in a wiring structure in which the power supply wire 38 and the ground wire 40 are separated.

In addition, since the magnetic lines of force generated from the power line 38 and the lines of magnetic force generated from the ground line 40 are in substantially opposite directions, by bringing the power line 38 and the ground line 40 into close contact like the twisted line 36, the next line of magnetic force is canceled out. Therefore, the influence of electromagnetic noise is reduced.

A communication line connection section 20 is provided on the outer surface of the main body section 12 . The communication line connection part 20 is formed on a different surface from the power line connection part 14 and the ground line connection part 16. In this embodiment, as an example, the communication line connection section 20 is formed on the surface of the main body section 12 opposite to the surface on which the power line connection section 14 and the ground line connection section 16 are formed. That is, the communication line connection section 20 is formed on the same surface as the twist line connection section 18.

One end of a communication line 42 is connected to the communication line connection section 20 . The communication line 42 is a line for communicating signals related to power supply, and the other end of the communication line 42 is connected to another ECU 74 (see FIG. 2) provided outside the control device 10. In this way, since the control device 10 and the other ECU 74 are connected via the communication line 42, the control device 10 is configured to be able to receive signals related to force supply from the other ECU 74 via the communication line 42.

The power supply control section 22 is provided inside the main body section 12, and the power supply control section 22 supplies power to the ECU 50 based on signals received from other ECUs 74 via the communication line 42.

(Hardware configuration of power supply control unit 22)
FIG. 2 is a block diagram showing the hardware configuration of the power supply control section 22. As shown in FIG. As shown in FIG. 2, the power supply control unit 22 includes a CPU (Central Processing Unit) 60, a ROM (Read Only Memory) 62, a RAM (Random Access Memory) 64, a storage 66, and an input/output I/F (input/output interface) 68. Each configuration is communicably connected to each other via a bus 70.

The CPU 60 is a central processing unit that executes various programs and controls various parts. That is, the CPU 60 reads the program from the ROM 62 or the storage 66 and executes the program using the RAM 64 as a work area. The CPU 60 controls each of the above components and performs various arithmetic operations according to programs recorded in the ROM 62 or the storage 66.

The ROM 62 stores various programs and various data. The RAM 64 temporarily stores programs or data as a work area. The storage 66 is configured with an HDD (Hard Disk Drive) or an SSD (Solid State Drive), and stores various programs including an operating system and various data.

The ECU 50, the battery 72, and other ECUs 74 are connected to the input/output I/F 68.

The power supply control unit 22 is configured as described above, and the supply of power to the ECU 50 is controlled by the CPU 60. For example, when power supply is required before the spacecraft is started, information regarding the required power and timing is transmitted from the other ECU 50 to the CPU 60 of the power supply control unit 22 via the communication line 42. Based on the received signal, the CPU 60 of the power supply control unit 22 constantly supplies specified power to the ECU 50 via the power supply line 32 at a specified timing.

Further, for example, when power supply is required during or after the start of the vehicle, information regarding the required power and timing is transmitted from the other ECU 50 to the CPU 60 of the power supply control unit 22 via the communication line 42. Sent. Based on the received signal, the CPU 60 of the power supply control unit 22 supplies specified power to the ECU 50 via the ignition power supply line 30 at a specified timing.

(effect)
Next, the operation of this embodiment will be explained.

The control device 10 according to the present embodiment includes the twisted wire connection portion 18 to which the twisted wire 36 is connected, so that the ignition power supply line 30 and the constant power supply line 32, which are the equipment side power supply lines, and the equipment side ground wire 34 are connected. The influence of electromagnetic noise can be reduced without twisting.

This effect will be explained using a comparative example.

FIG. 3 illustrates a wiring structure according to a first comparative example. As shown in FIG. 3, the control device 10 according to the present embodiment is not provided in the first comparative example. For this reason, the ignition power line 30 and the constant power line 32 are connected to the first connection portion 52 of the ECU 50 . Further, a device-side ground wire 34 is connected to the second connection portion 54 of the ECU 50, and the device-side ground wire 34 is grounded.

As described above, in the wiring structure according to the first comparative example, the power supply line and the ground line are not twisted, and therefore the influence of electromagnetic noise cannot be reduced.

On the other hand, FIG. 4 illustrates a wiring structure according to a second comparative example. As shown in FIG. 4, the second comparative example does not include the control device 10 according to the present embodiment. Further, in the second comparative example, a twisted portion 100 is formed by twisting three wires: an ignition power supply line 30, a constant power supply line 32, and a device-side ground line 34.

As described above, in the wiring structure according to the second comparative example, the numbers of power supply lines and ground lines do not match. Therefore, compared to the wiring structure in this embodiment, the noise reduction effect is lowered. Further, in the second comparative example, it is necessary to forcibly twist the three wires, the ignition power line 30, the constant power line 32, and the device-side ground line 34, making it difficult to form the twisted portion.

In contrast to the first comparative example and the second comparative example, in this embodiment, as shown in FIG. Therefore, the influence of electromagnetic noise can be reduced.

Furthermore, in this embodiment, the twisted wire 36 is formed by twisting two wires, the power supply wire 38 and the ground wire 40, so the twisted wire 36 can be formed more easily than in the second comparative example. . In particular, in this embodiment, the twist wire connection section 18 can be provided at a different position from the power supply line connection section 14 to which the ignition power supply line 30 and the constant power supply line 32 are connected.

Although the control device according to the embodiment has been described above, it goes without saying that the control device can be implemented in various ways without departing from the gist of the present invention. In the above embodiment, the power line connection part 14 and the ground line connection part 16 are formed on the surface of the main body 12 facing the ECU 50, and the twist wire connection part 18 and the communication line connection part 20 are formed on the surface opposite to this surface. formed, but is not limited to this. For example, the ground line connecting portion 16 may be formed on a different surface from the power line connecting portion 14 in accordance with the position of the equipment side ground wire 34. Furthermore, the communication line connection section 20 may be formed on a different surface from the twist line connection section 18 in accordance with the position of the communication line 42.

Further, although the control device 10 of the above embodiment is applied to a moving vehicle such as a spacecraft, the control device 10 is not limited thereto, and can be widely applied to other devices. For example, the control device 10 may be applied to space equipment such as a communication device for communicating between outer space and the ground, or a life support device that generates oxygen and nitrogen at a predetermined ratio. Furthermore, the present invention is not limited to spacecraft, and may be applied to equipment used on the ground.

10 Control device 14 Power line connection unit 16 Earth line connection unit 18 Twisted line connection unit 20 Communication line connection unit 22 Power supply control unit 30 Ignition power line (equipment side power line)
32 Constant power line (equipment side power line)
34 Equipment side ground wire 36 Twisted wire 38 Power line 40 Ground wire 42 Communication line

Claims (1)

a power line connection part to which a device side power line connected to the device is connected;
a ground wire connection part to which a device side ground wire connected to the device is connected;
a twisted wire connection portion connected to a power source and connected to a twisted wire formed by twisting a power source wire and a ground wire;
a communication line connection part to which a communication line for communicating signals related to power supply is connected;
a power supply control unit that supplies power to the device based on a signal received from the communication line;
A control device having: