WO2024007902A1 - Isolateur, dispositif de communication et système de communication - Google Patents

Isolateur, dispositif de communication et système de communication Download PDF

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Publication number
WO2024007902A1
WO2024007902A1 PCT/CN2023/102955 CN2023102955W WO2024007902A1 WO 2024007902 A1 WO2024007902 A1 WO 2024007902A1 CN 2023102955 W CN2023102955 W CN 2023102955W WO 2024007902 A1 WO2024007902 A1 WO 2024007902A1
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WO
WIPO (PCT)
Prior art keywords
cable
coupled
differential
input
isolation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/102955
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English (en)
Chinese (zh)
Inventor
李伟光
郝顺
刘光明
李亮
潘稻
李亚奇
卫超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2024007902A1 publication Critical patent/WO2024007902A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/32—Reducing cross-talk, e.g. by compensating
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/50—Systems for transmission between fixed stations via two-conductor transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines

Definitions

  • the present application relates to the field of communication transmission technology, and in particular, to an isolator, communication equipment and communication system.
  • Power line communication (PLC) technology is a technology that uses power transmission cables as communication channels.
  • a communication system and a power supply are provided.
  • the communication system includes multiple communication devices.
  • the power supply supplies power to multiple communication devices through the power transmission cable, and the multiple communication devices perform data communication through the power transmission cable.
  • the power supply also needs to supply power to other electrical equipment. These electrical devices can produce interference noise on power transmission cables, thereby interfering with data communications between multiple communication devices.
  • One improvement method is to set up an isolator between the power supply and the communication system, and use the isolator to isolate the interference noise generated by other electrical equipment on the power transmission cable, thereby avoiding the impact of the interference noise on the communication system.
  • the volume of the inductance device of the isolator is often set to be very large, making the area of the isolator also very large.
  • Embodiments of the present application provide an isolator, communication equipment and communication system, which reduce the volume of the isolator.
  • an isolator for receiving current provided by a power supply through a power input cable and outputting current to multiple communication devices respectively through a power output cable. Multiple communications devices are used for data communications over power output cables.
  • the isolator includes a capacitor circuit and a cable unit; the input end of the cable unit is coupled to the power supply through a power input cable; the output end of the cable unit is coupled to the communication manager through a power output cable; the capacitor circuit and the cable unit Coupling; the cable unit has equivalent inductance; the cable unit and the capacitor circuit form a filter structure.
  • a filter structure is formed by a capacitor circuit and a cable unit with equivalent inductance to isolate interference noise generated by electrical equipment, thereby preventing interference noise from affecting data communication between communication equipment.
  • the inductance device is replaced by a cable unit with equivalent inductance, thereby reducing the size of the isolator and making the installation of the isolator more convenient.
  • the capacitor circuit includes a first capacitor circuit and a second capacitor circuit; the cable unit has a first input end, a second input end, a first output end and a second output end; the cable unit has The first input end and the second input end are respectively coupled to a power output cable; the first output end and the second output end of the cable unit are respectively coupled to a power output cable; the first end of the first capacitor circuit Coupled with the first input end of the cable unit, the second end of the first capacitor circuit is coupled with the second input end of the cable unit; the first output end of the cable unit is coupled with the first end of the second capacitor circuit, the line The second output end of the cable unit is coupled to the second end of the second capacitor circuit; the cable unit is located between the first capacitor circuit and the second capacitor circuit to form a ⁇ -type filter.
  • the capacitor circuit includes a first capacitor circuit and a second capacitor circuit.
  • the first capacitor circuit, the second capacitor circuit and the cable unit form a ⁇ -type filter, and the interference noise is isolated through the ⁇ -type filter.
  • the cable unit includes a first isolated cable and a second isolated cable; the first end of the first isolated cable serves as the first input end of the cable unit, and the first end of the first isolated cable serves as the first input end of the cable unit.
  • the second end serves as the first output end of the cable unit; the first end of the second isolation cable serves as the second input end of the cable unit, and the second end of the second isolation cable serves as the second output end of the cable unit .
  • the power system may use two wires, the live wire and the neutral wire, to realize the power supply, or may use three wires, the live wire, the neutral wire and the ground wire, to realize the power supply.
  • the frequency of the current signal is 50Hz.
  • the communication equipment modulates the data that needs to be transmitted into communication information for interaction through power output cables.
  • the frequency of the modulated communication information It is much higher than the current signal, so the corresponding data can be easily demodulated from the power output cable.
  • the live wire, neutral wire, and ground wire can all be used as power output cables for transmitting communication information.
  • the isolator only needs to ensure that interference noise does not enter the cable as the power output cable.
  • the live wire and the neutral wire are both power output cables, respectively used for communication equipment.
  • Input communication information and communication equipment output communication information; when using live wire, neutral wire and ground wire to realize power supply, in single input single output communication mode, the power output cable can be live wire and neutral wire, or live wire and ground wire , or neutral and ground.
  • the power output cable coupled by the first isolation cable and the power output cable coupled by the second isolation cable are used between multiple communication devices in a single-input single-output (single- input single-output, SISO) mode for data communication.
  • SISO single-input single-output
  • the first isolated cable may be the live wire
  • the second isolated cable may be the neutral wire
  • the first isolation cable may be the live wire, and the second isolation cable may be the neutral line;
  • the first isolation cable may be a live wire, and the second isolation cable may be a ground wire; or, the first isolation cable may be a neutral wire, and the second isolation cable may be a ground wire.
  • the communication device may output communication information through the power output cable coupled with the first isolation cable, and input communication information through the power output cable coupled with the second isolation cable.
  • the communication device may also input communication information through the power output cable coupled with the first isolation cable, and output communication information through the power output cable coupled with the second isolation cable.
  • the first isolation cable and/or the second isolation cable are differential cables;
  • the differential cables include an input aggregation unit, an output aggregation unit and a plurality of first differential channel cables;
  • the input aggregation The first end of the unit serves as the first end of the differential cable and is coupled to the corresponding power input cable;
  • the second end of the input collection unit is coupled to the first end of each first differential channel cable;
  • each first differential The second end of the channel cable is coupled with the first end of the corresponding output collection unit respectively;
  • the second end of the output collection unit serves as the second end of the differential cable and is coupled with the corresponding power output cable;
  • each first differential channel The impedance of the cable is not equal to the impedance of the corresponding power input cable.
  • the isolator can have different isolation strengths to isolate interference noise at different strengths during data communication in single-input single-output mode.
  • the first differential channel cables among the first isolation cables and the second isolation cables correspond to each other to form a differential channel pair.
  • the first differential channel cable in the first isolated cable and the second isolated cable can be paired into pairs to form n pairs of differential channel pairs.
  • the first differential channel cable of the first isolation cable may be used to transmit the negative signal of the differential signal
  • the first differential channel cable of the second isolation cable may be used to transmit the positive signal of the differential signal.
  • the first differential channel cable of the first isolation cable may be used to transmit the positive signal of the differential signal
  • the first differential channel cable of the second isolation cable may be used to transmit the negative signal of the differential signal.
  • the differential cable further includes at least one second differential channel cable; the second end of the input aggregation unit is also coupled to the first end of each second differential channel cable; each second The impedance of the differential channel cable is not equal to the impedance of the corresponding power input cable.
  • the number of second differential channel cables between the first isolation cable and the second isolation cable may be equal or unequal.
  • At least one second differential channel cable may be provided at the second end of the input aggregation unit.
  • These second differential channel cables are coupled only to the input aggregation unit and not to the output aggregation unit.
  • the impedance is not equal to the impedance of the power input cable, so that the interference noise is reflected through the second differential channel cable.
  • the second end of the second differential channel cable is suspended (that is, it is not coupled to the output collection unit, etc.), its degree of reflection of interference noise is greater than that of the first differential channel cable, thereby increasing the isolator's impact on interference noise.
  • the degree of isolation required for isolation is the degree of isolation required for isolation.
  • the cable unit includes a first isolation cable, a second isolation cable, and a third isolation cable;
  • the capacitor circuit includes a first input capacitor circuit, a second input capacitor circuit, a first output capacitor circuit and the second output capacitor circuit.
  • the first end of the first isolation cable, the first end of the second isolation cable and the first end of the third isolation cable are respectively coupled with a power input cable; the second end of the first isolation cable, the first end of the third isolation cable.
  • the second end of the second isolation cable and the second end of the third isolation cable are coupled with one power output cable respectively.
  • the first end of the first input capacitor circuit is coupled to the first end of the first isolation cable, the second end of the first input capacitor circuit is coupled to the first end of the second isolation cable; the first end of the first output capacitor circuit is coupled to the first end of the first isolation cable.
  • the first end of the first output capacitor circuit is coupled with the second end of the first isolation cable, and the first end of the first output capacitor circuit is coupled with the second end of the second isolation cable.
  • the first end of the second input capacitor circuit is coupled to the first end of the second isolation cable, the second end of the second input capacitor circuit is coupled to the first end of the third isolation cable; the first end of the second output capacitor circuit is coupled to the first end of the second isolation cable.
  • the first end of the second output capacitor circuit is coupled with the second end of the third isolation cable.
  • the power supply source of the power system uses three wires: live wire, neutral wire and ground wire to realize power supply.
  • communication equipment uses three types of wires: live wire, neutral wire and ground wire to realize communication data interaction.
  • a multiple-input multiple-output mode can be proposed based on the live wire, neutral wire, and ground wire dog for communication data interaction.
  • the first isolated cable, the second isolated cable and the third isolated cable can all It is the live wire, neutral wire or ground wire, as long as the first isolated cable, the second isolated cable and the third isolated cable are not the same type of live wire, neutral wire and ground wire.
  • At least one of the first isolation cable, the second isolation cable and the third isolation cable is a differential cable;
  • the differential cable includes an input collection unit and an output collection unit and a plurality of first differential channel cables;
  • the first end of the input aggregation unit serves as the first end of the differential cable and is coupled to the corresponding power input cable;
  • the second end of the input aggregation unit is respectively connected to each first differential channel line
  • the first end of the cable is coupled;
  • the second end of each first differential channel cable is coupled with the first end of the corresponding output aggregation unit;
  • the second end of the output aggregation unit serves as the second end of the differential cable and the corresponding Power output cable coupling;
  • the impedance of each first differential channel cable is not equal to the impedance of the corresponding power input cable.
  • the isolator can have different isolation strengths to isolate interference noise of different strengths during data communication in the multiple-input multiple-output mode.
  • the first differential channel cables among the first isolation cable, the second isolation cable, and the third isolation cable may correspond in pairs to form a differential channel pair.
  • first differential channel cables between the first isolation cable and the second isolation cable may correspond in pairs to form a differential channel pair.
  • the first differential channel cables between the second isolation cable and the third isolation cable may correspond in pairs to form a differential channel pair.
  • the first isolation cable may be a live wire
  • the second isolation cable may be a neutral wire
  • the third isolation cable may be a ground wire
  • the first isolation cable may be a live wire
  • the second isolation cable may be a ground wire
  • the third isolation cable may be a neutral wire
  • the first isolation cable may be a ground wire
  • the second isolation cable may be a live wire
  • the third isolation cable may be a neutral wire.
  • the first isolated cable and the second isolated cable both include n first differential channel cables, and two of them form a differential channel pair
  • the first isolated cable and the second isolated cable The first differential channel cables can be paired in pairs to form n pairs of differential channel pairs.
  • the first differential channel cable of the first isolation cable may be used to transmit the negative signal of the differential signal
  • the first differential channel cable of the second isolation cable may be used to transmit the positive signal of the differential signal.
  • the first differential channel cable of the first isolation cable may be used to transmit the positive signal of the differential signal
  • the first differential channel cable of the second isolation cable may be used to transmit the negative signal of the differential signal.
  • the differential cable further includes at least one second differential channel cable; the second end of the input aggregation unit is also coupled to the first end of each second differential channel cable; each second The impedance of the differential channel cable is not equal to the impedance of the corresponding power input cable.
  • the differential channel pair formed by the second isolation cable and the third isolation cable please refer to the related description of the differential channel pair formed by the first isolation cable and the second isolation cable, and therefore will not be described again.
  • the number of second differential channel cables between the first isolation cable, the second isolation cable and the third isolation cable may be equal or unequal.
  • At least one second differential channel cable is provided at the second end of the input aggregation unit to improve the isolation of the isolator from interference noise.
  • the second isolation cable is configured as a differential cable will not be described again.
  • the sum of the current carrying capacities of the plurality of first differential channel cables in one differential cable is equal to the current carrying capacity of the corresponding power input cable.
  • the power input cable, the differential cable and the power output cable constitute a flow path. Therefore, it is necessary to ensure the consistency of their flow capabilities. It is necessary to set a corresponding number according to the size of the flow capacity.
  • the first differential channel cable is such that the current flow capacity of the differential cable is consistent with that of the power input cable and the power output cable.
  • the impedance of each first differential channel cable in a differential cable is not equal to the impedance of the corresponding power output cable.
  • the signal can also be reflected.
  • the impedance of the first differential channel cable being not equal to the power output cable.
  • the relevant description of the impedance of the input cable is not repeated here.
  • the cables in the cable unit are spirally wound.
  • the first isolation cable, the second isolation cable and/or the third isolation cable in the cable unit are all spirally wound.
  • the length of the isolation cable can be increased by spiral winding, thereby increasing the equivalent inductance of the isolation cable. This makes the cable unit have a larger equivalent inductance under the same length, thereby improving the isolation effect of the filter formed by the cable unit and the capacitor circuit.
  • the cables in the cable unit are wound using twisted pairs.
  • the first isolated cable, the second isolated cable and the third isolated cable in the cable unit are all wound using twisted pairs.
  • the common mode interference of the isolated cable can be reduced by winding twisted pairs.
  • embodiments of the present application also provide an isolator for receiving current provided by a power supply through a power input cable, and outputting current to a communication manager through a power output cable;
  • the isolator includes multiple differential lines cable; the input end of each differential cable is coupled to the power supply through the corresponding power input cable; the output end of each differential cable is coupled to the communication manager through the corresponding power output cable.
  • a differential cable includes an input aggregation unit, an output aggregation unit and a plurality of first differential channel cables; the first end of the input aggregation unit serves as the first end of the differential cable and is coupled with the corresponding power input cable; the input aggregation unit The second end of each first differential channel cable is coupled to the first end of each first differential channel cable; the second end of each first differential channel cable is coupled to the first end of the corresponding output aggregation unit; the third end of the output aggregation unit The two ends are coupled to the power output cable as the second end of the differential cable; the impedance of each first differential channel cable is not equal to the impedance of the corresponding power input cable.
  • the first differential channel cables of the two differential cables may correspond to each other to form a differential channel pair.
  • the differential cable further includes at least one second differential channel cable; the second end of the input aggregation unit is also coupled to the first end of each second differential channel cable; each second The impedance of the differential channel cable is not equal to the impedance of the corresponding power input cable.
  • the number of second differential channel cables between different differential cables may be equal or unequal.
  • the sum of the current carrying capacities of the plurality of first differential channel cables in one differential cable is equal to the current carrying capacity of the corresponding power input cable.
  • the impedance of each first differential channel cable in a differential cable is not equal to the impedance of the corresponding power output cable.
  • inventions of the present application also provide a communication device.
  • the communication device includes a power supply circuit, a communication manager and an isolator as described in the first or second aspect; the isolator communicates with the power supply through a power input cable.
  • the power supply is coupled and coupled with the second communication device through the power output cable; the power supply source is used to supply power to the power supply circuit through the power input cable; the power supply circuit is used to supply power to the communication manager; the communication manager is used to communicate with the power supply through the power output cable
  • the second communication device performs data communication.
  • the isolator described in the first aspect and/or the second aspect is disposed in the communication device, thereby reducing the additional volume occupied by the isolator, and making the installation of the isolator and the communication device easier. More convenient.
  • embodiments of the present application also provide a communication system, which includes a first communication device and a second communication device; the first communication device performs data communication with the second communication device through a power transmission cable; the first communication device
  • the communication device is the communication device described in the third aspect.
  • Figure 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • Figure 2 is a schematic structural diagram of a communication system and an isolator provided by an embodiment of the present application;
  • Figure 3 is a schematic structural diagram of an isolator provided by an embodiment of the present application.
  • Figure 4 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 5 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 6 is a schematic structural diagram of another isolator provided by an embodiment of the present application.
  • Figure 7 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 9 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 12 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 13 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 14 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 15 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 16 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 17 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 18 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Figure 19 is a schematic structural diagram of another communication system and isolator provided by an embodiment of the present application.
  • Coupled and “connection” involved in the embodiments of this application should be understood in a broad sense. For example, they may refer to a physical direct connection, or they may refer to an indirect connection realized through electronic devices, such as resistance, inductance, capacitance or other electronic devices.
  • the connection implemented by the device.
  • Power line communication (PLC) technology is a technology that uses power transmission cables as communication channels. It modulates analog or digital signals on power lines for transmission through carrier waves. It is a communication method based on the power system. Typical PLC communication is point to multiple point (P2MP) wired communication.
  • a communication system 1000 and a power supply 200 are provided.
  • the communication system 1000 includes a plurality of communication devices 100 .
  • Each communication device includes a connection circuit 110 , a power supply circuit 120 and a communication manager 130 .
  • the power supply source 200 is coupled to the connection circuit 110 of the communication device 100 through the power transmission cable 300, and supplies power to the power supply circuit 120 of the communication device 100 through the connection circuit 110.
  • the power supply circuit 120 is used to supply power to the corresponding communication manager 130 .
  • the communication managers 130 of the plurality of communication devices 100 are coupled to the power transmission cable 300 through corresponding connection circuits 110 , and perform data communication through the power transmission cable 300 .
  • the power supply 200 also needs to transmit power to other electrical appliances through the power transmission cable 300 Device 400 is powered.
  • the electrical device 400 may generate interference noise on the power transmission cable 300 , thereby causing interference to data communications between multiple communication devices 100 .
  • the power transmission cable 300 includes a power input cable 310 and a power output cable 320 .
  • the power supply 200 is coupled to the electrical device 400 and the isolator 500 respectively through the power input cable 310
  • the isolator 500 is coupled to the plurality of communication devices 100 in the communication system 1000 through the power output cable 320 .
  • the isolator 500 is used to receive current provided by the power supply 200 and provide current to each communication device 100 through the power output cable 320 .
  • Each communication device 100 receives electrical current provided by isolator 500 through power output cable 320 .
  • the isolator 500 is also used to isolate interference noise generated by the electrical device 400 on the power input cable 310 to prevent interference noise from being transmitted to the power output cable 320 .
  • Data communication is performed between multiple communication devices 100 through the power output cable 320 that is isolated from interference noise.
  • the isolator 500 includes a common mode inductor L1, a second inductor L2, a third inductor L3, a first capacitor C1, a second capacitor C2, and a third capacitor C3.
  • the first input end and the second input end of the common mode inductor L1 are respectively coupled to a power input cable 310; the first output end of the common mode inductor L1 is coupled to the first end of the second inductor L2.
  • the second output terminal is coupled to the first terminal of the third inductor L3.
  • the second end of the second inductor L2 and the second end of the third inductor L3 are respectively coupled to a power output cable 320 .
  • the first terminal of the first capacitor C1 is coupled to the first input terminal of the common mode inductor L1, and the second terminal of the first capacitor C1 is coupled to the second input terminal of the common mode inductor L1.
  • the first terminal of the second capacitor C2 is coupled with the first output terminal of the common mode inductor L1, and the second terminal of the second capacitor C2 is coupled with the second output terminal of the common mode inductor L1.
  • the first terminal of the second capacitor C2 is coupled with the first output terminal of the common mode inductor L1, and the second terminal of the second capacitor C2 is coupled with the second output terminal of the common mode inductor L1.
  • the first terminal of the third capacitor C3 is coupled with the second terminal of the second inductor L2, and the second terminal of the third capacitor C3 is coupled with the second terminal of the third inductor L3.
  • the power input cable 310 and the power output cable 320 coupled to the second inductor L2 may be a live line (L), and the power input cable 310 and the second power output line coupled to the third inductor L3 Cable 320 may be a neutral line (N).
  • L live line
  • N neutral line
  • the isolator 500 is coupled to the main line of the power output cable 320 to isolate interference noise from reaching the main line of the power output cable 320. on the line. Then, the main line of the power output cable 320 is branched into a plurality of branch lines, and power is supplied to multiple communication devices 100 through the branch lines respectively.
  • the main line of the power input cable 310 and the power output cable 320 needs to have a large current flow capacity to ensure that the current on each branch line after the branch is sufficient to drive the corresponding communication equipment. 100 works fine.
  • the isolator 500 When the flow capacity of the power input cable 310 and the power output cable 320 is large, the isolator 500 needs to have a stronger noise isolation capability to achieve isolation of interference noise. This often requires the device volume of the isolator 500 to be set very large. The isolator 500 occupies a very large installation area. When using the isolator 500 shown in Figures 3 and 4, the inductance values of the common mode inductor L1, the second inductor L2 and the third inductor L3 in the isolator 500 need to be set to very large values, which also means that The common mode inductor L1, the second inductor L2 and the third inductor L3 are very large.
  • the installation of the isolator 500 involves strong current installation.
  • the process of strong current installation is cumbersome and complex, and the isolator 500 is too large, making the installation more complicated. Difficulty, which will increase the complexity of the installation and reduce the security of the installation.
  • the communication network architecture includes a communication system 1000, a power supply 200, a power input cable 310, and a power output cable. Cable 320, electrical equipment 400, isolator 500.
  • Communication system 1000 includes a plurality of communication devices 100 . Each communication device includes a connection circuit 110 , a power supply circuit 120 and a communication manager 130 .
  • the isolator 500 includes a cable unit 510 and a capacitive circuit 520 .
  • the power supply 200 is coupled to the input end of the cable unit 510 through the power input cable 310, and the output end of the cable unit 510 is respectively connected to the connection circuit 110 in each communication device 100 in the communication system 1000 through the power output cable 320. coupling.
  • the connection circuit 110 is coupled to the corresponding power supply circuit 120 and the communication manager 130 respectively.
  • the power supply circuit 120 is also coupled with a corresponding communication manager 130 .
  • Capacitive circuit 520 is coupled to cable unit 510 .
  • the cable unit 510 has an equivalent inductance and forms a filter structure with the capacitor circuit 520 .
  • the power supply source 200 outputs current to the isolator 500 and the electrical device 400 through the power input cable 310, and the cable unit 510 supplies power to the power supply circuit 120 in each communication device 100 through the power output cable 320 and the connection circuit 110.
  • Each communication device The power supply circuit 120 in 100 supplies power to the corresponding communication manager 130. Data communication is performed between the communication manager 130 of the communication device 100 through the connection circuit 110 and the power output cable 320.
  • the capacitor circuit 520 and the cable unit 510 with equivalent inductance form a filter structure to isolate the interference noise generated by the electrical equipment 400, thereby preventing the interference noise from affecting the data communication between the communication equipment 100. cause impact.
  • the inductance device is replaced by a cable unit 510 with equivalent inductance, thereby reducing the size of the isolator 500 and making the installation of the isolator 500 more convenient.
  • the capacitor circuit 520 includes a first capacitor circuit 521 and a second capacitor circuit 522; the cable unit 510 has a first input end, a second input end, a first output end and the second output end; the first input end and the second input end of the cable unit 510 are respectively coupled to a power output cable 320; the first output end and the second output end of the cable unit 510 are respectively coupled to a power output cable.
  • the cable 320 is coupled; the first end of the first capacitive circuit 521 is coupled with the first input end of the cable unit 510, and the second end of the first capacitive circuit is coupled with the second input end of the cable unit 510; the cable unit 510 The first output end of the cable unit 510 is coupled to the first end of the second capacitor circuit 522, and the second output end of the cable unit 510 is coupled to the second end of the second capacitor circuit 522; the cable unit 510 is located between the first capacitor circuit 521 and the second capacitor circuit 522. Between the two capacitor circuits 522, a ⁇ -type filter is formed.
  • the capacitor circuit 520 includes a first capacitor circuit 521 and a second capacitor circuit 522.
  • the first capacitor circuit 521 and the second capacitor circuit 522 and the cable unit 510 form a ⁇ -type filter, and the interference noise is isolated through the ⁇ -type filter.
  • the cable unit 510 includes a first isolation cable 511 and a second isolation cable 512 ; the first end of the first isolation cable 511 serves as the third end of the cable unit 510 .
  • An input end, the second end of the first isolation cable 511 serves as the first output end of the cable unit 510; the first end of the second isolation cable 512 serves as the second input end of the cable unit 510, and the second isolation cable
  • the second end of the cable 512 serves as the second output end of the cable unit 510 .
  • the plurality of communication devices 100 are coupled through the power output cable 320 coupled by the first isolation cable 511 and the power output cable 320 coupled by the second isolation cable 512 to form a single-input single-output (single- input single-output, SISO) mode for data communication.
  • the communication device 100 may output communication information through the power output cable 320 coupled with the first isolation cable 511 and input communication information through the power output cable 320 coupled with the second isolation cable 512 .
  • the communication device 100 may also input communication information through the power output cable 320 coupled with the first isolation cable 511 and output communication information through the power output cable 320 coupled with the second isolation cable 512 .
  • the first isolation cable 511 may be the live wire
  • the second isolation cable 512 may be the neutral wire
  • the first isolation cable 511 may be the live line, and the second isolation cable 512 It can be a neutral line; or the first isolation cable 511 can be a live wire, and the second isolation cable 512 can be a ground wire; or the first isolation cable 511 can be a neutral line, and the second isolation cable 512 can be a ground wire. Wire.
  • the power system may use two wires, the live wire and the neutral wire, to realize the power supply, or may use three wires, the live wire, the neutral wire and the ground wire, to realize the power supply.
  • the frequency of the current signal is 50Hz.
  • the communication device 100 modulates the data to be transmitted into communication information for interaction through the power output cable 320 .
  • the frequency of the modulated communication information is much higher than the current signal, so the corresponding data can be easily demodulated from the power output cable 320.
  • the live wire, neutral wire, and ground wire can all be used as power output cables 320 for transmitting communication information.
  • the isolator 500 only needs to ensure that interference noise does not enter the cable as the power output cable 320.
  • the live wire and the neutral wire are both power output cables 320, respectively.
  • the communication device 100 inputs communication information and the communication device 100 outputs communication information; when the live wire, neutral wire and ground wire are used to realize power supply, in the single-input single-output communication mode, the power output cable 320 can be the live wire and the neutral wire, Either live wire and ground wire, or neutral wire and ground wire.
  • the cable unit 510 includes a first isolation cable 511 , a second isolation cable 512 and a third isolation cable 513 ;
  • the capacitance circuit 520 includes a first input capacitance circuit 523 , the second input capacitor circuit 524, the first output capacitor circuit 525 and the second output capacitor circuit 526.
  • the first end of the first isolation cable 511, the first end of the second isolation cable 512 and the first end of the third isolation cable 513 are respectively coupled to a power input cable 310;
  • the first isolation cable The second end of 511, the second end of the second isolation cable 512 and the second end of the third isolation cable 513 are respectively coupled to a power output cable 320.
  • the first end of the first input capacitor circuit 523 is coupled to the first end of the first isolation cable 511, and the second end of the first input capacitor circuit 523 is coupled to the first end of the second isolation cable 512; the first output capacitor The first end of the circuit 525 is coupled to the second end of the first isolation cable 511, and the first end of the first output capacitor circuit 525 is coupled to the second end of the second isolation cable 512. Two-terminal coupling.
  • the first end of the second input capacitor circuit 524 is coupled to the first end of the second isolation cable 512, and the second end of the second input capacitor circuit 524 is coupled to the first end of the third isolation cable 513; the second output capacitor The first end of the circuit 526 is coupled to the second end of the second isolation cable 512 , and the first end of the second output capacitor circuit 526 is coupled to the second end of the third isolation cable 513 .
  • the plurality of communication devices 100 are coupled through the power output cable 320 corresponding to the first isolation cable 511, the second isolation cable 512, and the third isolation cable 513 to form a multiple-input multiple-output (single- input single-output, SISO) mode for data communication.
  • the communication device 100 may use the power output cable 320 coupled with the first isolation cable 511 and the power output cable 320 coupled with the second isolation cable 512 as a set of channels for inputting communication information and outputting communication information.
  • the corresponding first input capacitor circuit 523 and the first output capacitor circuit 525 form a filter structure with the first isolation cable 511 and the second isolation cable 512, which can isolate interference noise from entering the first isolation cable 511 and the second isolation cable 512.
  • the second isolation cable 512 is coupled to the power output cable 320 .
  • the communication device 100 can also use the power output cable 320 coupled with the second isolation cable 512 and the power output cable 320 coupled with the third isolation cable 513 as a set of channels for inputting communication information and outputting communication information.
  • the corresponding second input capacitor circuit 524 and the second output capacitor circuit 526 form a filter structure with the second isolation cable 512 and the third isolation cable 513, which can isolate interference noise from entering the second isolation cable 512 and
  • the third isolation cable 513 is coupled to the power output cable 320 .
  • the first isolation cable 511, the second isolation cable 512 and the third isolation cable 511 can all be live wires, neutral wires or ground wires, as long as the first isolation cable 511, the second isolation cable 512 and the third isolation cable 513 are not the same among the live wires, neutral wires and ground wires. Just plant it.
  • the cables in the cable unit 510 are spirally wound.
  • both the first isolation cable 511 and the second isolation cable 512 in the cable unit 510 are spirally wound.
  • the first isolation cable 511 , the second isolation cable 512 and the third isolation cable 513 in the cable unit 510 are all spirally wound.
  • the length of the isolation cable can be increased by spiral winding, thereby increasing the equivalent inductance of the isolation cable. Therefore, under the same length, the cable unit 510 has a larger equivalent inductance, thereby improving the isolation effect of the filter formed by the cable unit 510 and the capacitor circuit 520 .
  • the cables in the cable unit are wound using twisted pairs.
  • both the first isolated cable 511 and the second isolated cable 512 in the cable unit 510 are wound using twisted pairs.
  • the first isolated cable 511 , the second isolated cable 512 and the third isolated cable 513 in the cable unit 510 are all wound using twisted pairs.
  • the common mode interference of the isolated cable can be reduced by winding twisted pairs.
  • the first isolation cable 511 and/or the second isolation cable 512 are differential cables;
  • the differential cables include Input collection unit 61, a plurality of first differential channel cables 62 and output collection unit 63; the first end of the input collection unit 61 serves as the first end of the differential cable and is coupled with the corresponding power input cable 310; the input collection unit 61
  • the second end of each first differential channel cable 62 is coupled to the first end of each first differential channel cable 62; the second end of each first differential channel cable 62 is coupled to the first end of the corresponding output collection unit 63;
  • the output collection The second end of the unit 63 serves as the second end of the differential cable and is coupled to the corresponding power output cable 320; the impedance of each first differential channel cable 62 is not equal to the impedance of the corresponding power input cable 310.
  • each power input cable 310 is Z 0 and the impedance of each first differential channel cable 62 is Z 1 .
  • the calculation formula of the reflection coefficient ⁇ is:
  • the isolator 500 can have different isolation strengths to isolate interference noise of different strengths during data communication in the single-input single-output mode.
  • the first differential channel cables 62 in the first isolation cable 511 and the second isolation cable 512 correspond in pairs to form a differential channel pair.
  • the first isolated cable 511 and the second isolated cable 512 both including n first differential channel cables 62
  • a pair of differential channel cables 62 can be paired to form n pairs of differential channel pairs.
  • the first differential channel cable 62 of the first isolation cable 511 may be used to transmit the negative signal of the differential signal
  • the first differential channel cable 62 of the second isolation cable 512 may be used to transmit the negative signal of the differential signal.
  • Positive signal the first differential channel cable 62 of the first isolation cable 511 may be used to transmit the positive signal of the differential signal
  • the first differential channel cable 62 of the second isolation cable 512 may be used to transmit the negative signal of the differential signal.
  • the differential cable also includes at least one second differential channel cable 64 ; the second end of the input aggregation unit 61 is also connected to each second differential channel cable 64 respectively. First end coupling; the impedance of each second differential channel cable 64 is not equal to the impedance of the corresponding power input cable.
  • the number of second differential channel cables 64 between the first isolation cable 511 and the second isolation cable 512 may be equal or unequal.
  • At least one second differential channel cable 64 may be provided at the second end of the input aggregation unit 61 .
  • These second differential channel cables 64 are only coupled to the input aggregation unit 61 and not to the output aggregation unit 63 . Because the impedance of the second differential channel cable 64 is not equal to the impedance of the power input cable, interference noise is reflected through the second differential channel cable 64 . At the same time, because the second end of the second differential channel cable 64 is suspended (that is, it is not coupled to the output aggregation unit 63, etc.), its degree of reflection of interference noise is greater than that of the first differential channel cable 62, thereby increasing the number of isolators. 500 degree of isolation from interfering noise.
  • the isolated cable is a differential cable;
  • the differential cable includes an input aggregation unit 61, a plurality of first differential channel cables 62 and an output aggregation unit 63; the first end of the input aggregation unit 61 serves as the first end of the differential cable and
  • the corresponding power input cable 310 is coupled;
  • the second end of the input collection unit 61 is coupled with the first end of each first differential channel cable 62;
  • the second end of each first differential channel cable 62 is coupled with the corresponding The first end of the output collection unit 63 is coupled;
  • the second end of the output collection unit 63 is coupled with the corresponding power output cable 320 as the second end of the differential cable;
  • the impedance of each first differential channel cable 62 does not is equal to the impedance of the corresponding power input cable 310.
  • the signal is Reflection is used to further isolate interference noise, thereby achieving different strengths of isolation for interference noise during data communication in multiple-input multiple-output mode.
  • the first differential channel cables 62 among the first isolation cable 511 , the second isolation cable 512 and the third isolation cable 513 may correspond in pairs to form a differential channel pair.
  • first differential channel cables 62 between the first isolation cable 511 and the second isolation cable 512 may correspond in pairs to form a differential channel pair.
  • the first differential channel cables 62 between the second isolation cable 512 and the third isolation cable 513 may correspond in pairs to form a differential channel pair.
  • the first isolation cable 511 may be a live wire
  • the second isolation cable 512 may be a neutral wire
  • the third isolation cable 513 may be a ground wire
  • the first isolation cable 511 may be a live wire
  • the second isolation cable 512 may be a ground wire
  • the third isolation cable 513 may be a neutral wire
  • the first isolation cable 511 may be a ground wire
  • the second isolation cable 512 may be a live wire
  • the third isolation cable 513 may be a neutral wire.
  • both the first isolated cable 511 and the second isolated cable 512 include n first differential channel cables 62
  • the first differential channel cables 62 of the first isolated cable 511 and the second isolated cable 512 can be paired in pairs to form n differential channel pairs.
  • the first differential channel cable 62 of the first isolation cable 511 may be used to transmit the negative signal of the differential signal
  • the first differential channel cable 62 of the second isolation cable 512 may be used to transmit the negative signal of the differential signal.
  • Positive signal
  • the first differential channel cable 62 of the first isolation cable 511 may be used to transmit the positive signal of the differential signal
  • the first differential channel cable 62 of the second isolation cable 512 may be used to transmit the negative signal of the differential signal.
  • the differential cable also includes at least one second differential channel cable 64 ; the second end of the input aggregation unit 61 is also connected to each second differential channel cable 64 respectively.
  • First end coupling; the impedance of each second differential channel cable 64 is not equal to the impedance of the corresponding power input cable.
  • the number of second differential channel cables 64 between the first isolation cable 511, the second isolation cable 512 and the third isolation cable 513 may be equal or unequal.
  • At least one second differential channel cable 64 is provided at the second end of the input aggregation unit 61 to improve the isolation of the isolator 500 from interference noise.
  • first isolation cable. 511 and/or the second isolation cable 512 are configured as differential cables, and are therefore not described again.
  • the impedance of each first differential channel cable 62 in a differential cable is not equal to the impedance of the corresponding power output cable 320 .
  • the impedance of the first differential channel cable 62 is not equal to the impedance of the power output cable 320, signal reflection can also be achieved.
  • the specific principle please refer to the above-mentioned impedance of the first differential channel cable 62.
  • the relevant description in the embodiment is not equal to the impedance of the power input cable 310, so no details are given here.
  • the sum of the current carrying capacities of the plurality of first differential channel cables 62 in one differential cable is equal to the current carrying capacity of the corresponding power input cable 310 .
  • the power input cable 310, the differential cable and the power output cable 320 constitute a flow path. Therefore, it is necessary to ensure the consistency of their flow capabilities. It is necessary to set corresponding settings according to the size of the flow capacity.
  • the number of first differential channel cables 62 is such that the current carrying capacity of the differential cables is consistent with the power input cable 310 and the power output cable 320 and so on.
  • the isolator 500 may be provided in a certain communication device 100 in the communication system 1000 .
  • the first communication device 101 is provided with the isolator 500, and the second communication device 102 is not provided with the isolator 500.
  • multiple communication devices 100 can perform data interactive communication based on the G.hn protocol.
  • the plurality of communication devices 100 include a master communication device serving as a domain master (DM) and a plurality of slave communication devices serving as end nodes (EP).
  • the domain manager generally configures the domain manager DM mode in the communication device 100 connected to the upstream parent route to establish domain information.
  • Other communication devices 100 join the domain as an end node EP to form a communication system 1000.
  • multiple communication devices 100 can perform data interactive communication based on the Homeplug protocol.
  • the plurality of communication devices 100 include a master communication device serving as a center coordinator (CCO) and multiple slave communication devices serving as slave stations (STAs).
  • the central coordinator configures the central coordinator CCO mode in the communication device 100 connected to the upstream parent route to establish domain information.
  • Other communication devices 100 join this domain as a slave site to form a communication system 1000.
  • the first communication device 101 provided with the isolator 500 may be a DM or a CCO, an EP or an STA.
  • the function of the isolator 500 is to isolate interference noise from entering the power output cable 320 .
  • the volume of the isolator 500 is greatly reduced. Then the isolator 500 can be disposed in the communication device 100, thereby reducing the trouble of installing the isolator 500.
  • the user's installation space can be further saved.
  • all cables involved in the embodiments of this application may be signal cables or metal connections, or may be metal traces on a metal plate, etc.
  • the isolator 500 includes multiple differential cables 60; the input end of each differential cable 60 passes through the corresponding power input cable 310 and the power supply. 200 coupling; the output end of each differential cable 60 is coupled to the communication manager 130 through a corresponding power output cable 320; one differential cable 60 includes an input aggregation unit 61, a plurality of first differential channel cables 62 and The output aggregation unit 63; the first end of the input aggregation unit 61 serves as the first end of the differential cable 60 and is coupled to the corresponding power input cable 310; the second end of the input aggregation unit 61 is respectively connected to each first differential channel cable.
  • the first end of 62 is coupled; the second end of each first differential channel cable 62 is coupled with the first end of the corresponding output collection unit 63; the second end of the output collection unit 63 serves as the second end of the differential cable 60
  • the end is coupled to the corresponding power output cable 320; the impedance of each first differential channel cable 62 is not equal to the impedance of the corresponding power input cable 310.
  • the power supply 200 when the power supply 200 supplies power to the power supply circuit 120 of the communication device 100 through the live wire and the neutral wire, it may include two differential cables 60 corresponding to the live wire and the neutral wire respectively.
  • the power supply 200 when the power supply 200 supplies power to the power supply circuit 120 of the communication device 100 through the live wire, neutral wire and ground wire, it may include three differential cables 60 corresponding to the live wire, neutral wire and ground wire respectively.
  • the power input cable 310 and the first differential channel cable 62 in the differential cable 60 have different impedances, thereby reflecting the interference noise to isolate the interference noise.
  • reflection of noise reference may be made to the related technical descriptions in the embodiments of the cable unit 510 mentioned above, and therefore will not be described again.
  • the impedance of each first differential channel cable 62 in a differential cable 60 is not equal to the impedance of the corresponding power output cable 320 .
  • impedance please refer to the related technical descriptions in the embodiments of the cable unit 510 mentioned above, and therefore will not be described again.
  • the sum of the current carrying capacities of the plurality of first differential channel cables 62 in one differential cable 60 is equal to the current carrying capacity of the corresponding power input cable 310 .
  • the relevant description of the flow capacity please refer to the relevant technical description in the above embodiment of the cable unit 510, so the details will not be described again.
  • the first differential channel cables in the two differential cables 60 may correspond to each other to form a differential channel pair.
  • the differential cable 60 further includes at least one second differential channel cable 64 ; the second end of the input aggregation unit 61 is also connected to each second differential channel cable 64 respectively.
  • the first end coupling; the impedance of each second differential channel cable 64 is not equal to the impedance of the corresponding power input cable.
  • the number of second differential channel cables 64 between different differential cables 60 may be equal or unequal.
  • the differential cable 60 is wound using twisted pairs.
  • twisted pair winding please refer to the relevant technical description in the above embodiment of the cable unit 510, so no further description will be given.
  • the isolator 500 may be provided in a certain communication device 100 in the communication system 1000 .
  • the relevant description of the installation of the isolator 500 in the communication system 1000 reference may be made to the relevant technical description in the above embodiment of the cable unit 510, so the details will not be described again.
  • all cables involved in the embodiments of this application may be signal cables or metal connections, or may be metal plates, metal wiring, etc.
  • the embodiments of this application provide an isolator, communication equipment, and communication system.
  • the cable unit has an equivalent inductance, and the cable unit and the capacitor circuit form a filter structure to isolate the interference noise generated by the electrical equipment.
  • the cable unit is used instead of the traditional inductor, the volume of the isolator is greatly reduced, and the safety and ease of installation of the isolator are improved.
  • the interference noise can also be isolated by arranging differential cables in the isolator, thereby isolating the interference noise with a smaller isolator volume.
  • the isolator can be set up in the communication equipment to further reduce the complexity of the installation and reduce the installation volume occupied by the user.
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the above communication equipment in the embodiments of this province and city may also be called network routing, routing node, user device, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user Terminal, terminal, wireless communication device, user agent or user device.
  • the communication device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with transceiver functions, a virtual reality (VR) terminal device, or an augmented reality (AR) terminal device , terminals in industrial control, terminals in self-driving, terminals in remote medical, terminals in smart grid, terminals in transportation safety Terminals, terminals in smart cities, terminals in smart homes, etc.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of modules is only a logical function division. In actual implementation, there may be other division methods.
  • multiple modules or components may be combined or can be integrated into another device, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or modules, which may be in electrical, mechanical or other forms.
  • modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located on one device, or they may be distributed to multiple devices. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional module in each embodiment of the present application can be integrated in one device, or each module can exist physically alone, or two or more modules can be integrated in one device.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Filters And Equalizers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

Des modes de réalisation de la présente demande concernent un isolateur, un dispositif de communication et un système de communication. Une unité de câble et un circuit de condensateur sont agencés dans l'isolateur. L'unité de câble comprend une bobine d'induction équivalente, et une structure de filtre est formée par l'unité de câble et le circuit de condensateur afin d'isoler le bruit d'interférence généré par un dispositif électrique. Du fait qu'une bobine d'induction classique est remplacée par l'unité de câble, la taille de l'isolateur est considérablement réduite, et la sécurité et la facilité d'installation de l'isolateur sont améliorées. De plus, un câble différentiel peut être placé dans l'isolateur de façon à réaliser l'isolation par réflexion du bruit d'interférence et améliorer l'effet d'isolation du bruit d'interférence avec la petite taille de l'isolateur. De plus, à condition que la taille de l'isolateur soit considérablement réduite, l'isolateur peut être placé dans le dispositif de communication de façon à réduire encore la complexité d'installation et diminuer l'occupation du volume d'installation d'un utilisateur.
PCT/CN2023/102955 2022-07-07 2023-06-27 Isolateur, dispositif de communication et système de communication Ceased WO2024007902A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202210794983.5 2022-07-07
CN202210794983 2022-07-07
CN202211676325.2A CN117375666A (zh) 2022-07-07 2022-12-26 一种隔离器、通信设备及通信系统
CN202211676325.2 2022-12-26

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WO2024007902A1 true WO2024007902A1 (fr) 2024-01-11

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Citations (7)

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US6417762B1 (en) * 2001-03-30 2002-07-09 Comcircuits Power line communication system using anti-resonance isolation and virtual earth ground signaling
CN101123391A (zh) * 2007-09-27 2008-02-13 福建星网锐捷网络有限公司 电源变换方法及其装置
CN101900782A (zh) * 2010-07-01 2010-12-01 思源电气股份有限公司 气体绝缘组合电器设备测试系统
CN207541186U (zh) * 2017-10-23 2018-06-26 华中科技大学 一种用于绝缘芯变压器型高压电源的电流测量电路
CN112653332A (zh) * 2020-12-08 2021-04-13 阳光电源股份有限公司 一种双向dc/dc变换系统的控制方法、装置及控制器
CN216774768U (zh) * 2021-11-16 2022-06-17 广东金朋科技有限公司 一种可手动控制电力线噪声隔离的导轨式单相隔离器
CN116094545A (zh) * 2023-02-03 2023-05-09 广东聚核智能电器股份有限公司 一种解决plc电气控制设备应用干扰的方法及系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6417762B1 (en) * 2001-03-30 2002-07-09 Comcircuits Power line communication system using anti-resonance isolation and virtual earth ground signaling
CN101123391A (zh) * 2007-09-27 2008-02-13 福建星网锐捷网络有限公司 电源变换方法及其装置
CN101900782A (zh) * 2010-07-01 2010-12-01 思源电气股份有限公司 气体绝缘组合电器设备测试系统
CN207541186U (zh) * 2017-10-23 2018-06-26 华中科技大学 一种用于绝缘芯变压器型高压电源的电流测量电路
CN112653332A (zh) * 2020-12-08 2021-04-13 阳光电源股份有限公司 一种双向dc/dc变换系统的控制方法、装置及控制器
CN216774768U (zh) * 2021-11-16 2022-06-17 广东金朋科技有限公司 一种可手动控制电力线噪声隔离的导轨式单相隔离器
CN116094545A (zh) * 2023-02-03 2023-05-09 广东聚核智能电器股份有限公司 一种解决plc电气控制设备应用干扰的方法及系统

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