CN114678955B - Double-wire power supply remote control device, control method and electric equipment - Google Patents
Double-wire power supply remote control device, control method and electric equipment Download PDFInfo
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- CN114678955B CN114678955B CN202210328553.4A CN202210328553A CN114678955B CN 114678955 B CN114678955 B CN 114678955B CN 202210328553 A CN202210328553 A CN 202210328553A CN 114678955 B CN114678955 B CN 114678955B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
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- Power Engineering (AREA)
- Selective Calling Equipment (AREA)
- Dc Digital Transmission (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention provides a double-wire power supply remote control device, a control method and an electric device, wherein the device comprises a power supply unit and a load unit and is connected through double cables; the power supply unit comprises a power supply module, a first switch module and a current induction module; the first switch module controls the output of voltage and transmits the output voltage waveform to the load unit; the current sensing module senses a current waveform fed back by the load unit; the load unit comprises a load, a second switch module, a current limiting resistor and a voltage induction module; the second switch module and the current limiting resistor are used for adjusting the magnitude of load current fed back to the power supply unit; the voltage induction module induces a voltage waveform input by the power supply unit, and the second switch module is used for generating a current waveform. Based on the device, a two-wire power supply remote control method and an electric device are also provided. The invention reduces the number of cables required for direct current power transmission, improves the reliability of the system and simplifies the design complexity.
Description
Technical Field
The invention belongs to the technical field of power supply of electrical equipment, and particularly relates to a double-wire power supply remote control device, a control method and electrical equipment.
Background
In the field of electric appliances, there is an inevitable need for switching on and off a switch in an electric power supply, and means for achieving the function can be roughly divided into two types, namely a physical mechanical switch and an electromagnetic or electronic self-control switch, wherein the physical mechanical switch is generally manually operated, and the electromagnetic or electronic self-control switch is used for realizing automatic control in cooperation with a circuit signal. Additional signal transmission lines are required because of the control requirements, resulting in additional line costs and connector pin count.
Fig. 1 shows a schematic diagram of a control architecture of a power circuit switch circuit, which is commonly used in the prior art, and after a power signal is output from a power supply side, energy is sent to a load side through a power cable. Because of the switch on-off control requirement, whether the requirement comes from the system, the power supply side or the load side, there is a requirement for communication exchange information, and whether the requirement is by way of simple GPIO or digital communication, an additional signal connection wire or a wire connector is required. Because of the need for additional signal connection wires or wire connectors, the cost of the wire is increased in the application occasions with a longer distance, the cost proportion of the connector is higher than that of the wire, and because of the system design, the system complexity is generally expected to be as good as possible under the same function, the number of the connectors is smaller and better, but the pins with high power and the signal pins with low current are integrated into a connector form, the common mode on the market is generally less, the specification is not necessarily available, the specification is likely to be customized, and the connector is internally provided with excessive pins, so that the system fault risk and the fault checking maintenance cost are increased in the environment with more complex working environment such as high humidity water and sand dust.
Disclosure of Invention
In order to solve the technical problems, the invention provides a two-wire power supply remote control device, a control method and an electric device. The number of cables required for direct current power transmission is reduced, an improved power loop structure is simplified, the reliability of the system is improved, and the design complexity is simplified.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a two-wire power supply remote control device comprises a power supply unit and a load unit; the power supply unit is connected with the load unit through double cables;
the power supply unit comprises a power supply module, a first switch module and a current induction module; the first switch module is used for controlling whether the voltage of the power supply module is output or not and transmitting the output voltage waveform to the load unit; the current sensing module is used for sensing a current waveform fed back by the load unit;
the load unit comprises a load, a second switch module, a current limiting resistor and a voltage induction module; the second switch module is connected in series with the current limiting resistor and then connected in parallel with the load, and is used for adjusting the magnitude of load current fed back to the power supply unit; the voltage induction module is used for inducing a voltage waveform input by the power supply unit; the output end of the voltage induction module is connected with the second switch module; the second switch module is used for generating a current waveform.
Further, the power supply unit further comprises a first codec; the input end of the first coder-decoder is connected with the power supply module, and the output end of the first coder-decoder is connected with the first switch module through the first gate controller;
the first codec is used for converting the voltage output by the power supply module into a digital voltage signal.
Further, the first switch module adopts a first MOS tube;
the grid electrode of the first MOS tube is connected with a gate controller; the drain electrode of the first MOS tube is connected with the input end of the power supply module; the source electrode of the first MOS tube is connected to a load through the current sensing module.
Further, the current sensing module is further connected to an input end of the first codec, and is configured to feed current fed back by the load module back to the first codec.
Further, the load unit further comprises a capacitor; the capacitor is connected across the two ends of the load in a bridging way and is used for ensuring that the power supply of the load is not interrupted.
Further, the load unit further comprises a second codec;
the input end of the second coder-decoder is connected with the voltage induction module and is used for coding and decoding the digital voltage signal input by the power supply unit; the output end of the second coder-decoder is connected to the control end of the second switch module.
Further, the second switch module adopts a second MOS tube;
the grid electrode of the second MOS tube is connected with a second gate controller; the source electrode of the second MOS tube is connected to one end of the load through the current limiting resistor, the drain electrode of the second MOS tube is connected to the anode of the diode, and the cathode of the diode is connected to the other end of the load.
The invention also provides a double-wire power supply remote control method which is realized based on the double-wire power supply remote control device and is applied to the power supply unit, and the method comprises the following steps:
controlling output of a voltage waveform to a load unit through a first switch module in the power supply unit;
the current waveform generated based on the voltage waveform output received by the load unit is sensed to adjust the voltage output of the power supply unit.
The invention also provides a method for the double-wire power supply remote control device, which is realized based on the double-wire power supply remote control device and is applied to a load unit, and comprises the following steps:
receiving a voltage waveform from a power supply unit;
and generating a current waveform through a second switch module in the load unit according to the voltage waveform, and feeding back the current waveform to the power supply unit.
The invention also provides an electrical device comprising the two-wire power supply remote control device.
The effects provided in the summary of the invention are merely effects of embodiments, not all effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
the invention provides a remote control device and a control method of a double-wire power supply and an electric device, wherein the remote control device comprises a power supply unit and a load unit; the power supply unit is connected with the load unit through double cables; the power supply unit comprises a power supply module, a first switch module and a current induction module; the first switch module is used for controlling whether the voltage of the power supply module is output or not and transmitting the output voltage waveform to the load unit; the current sensing module is used for sensing a current waveform fed back by the load unit; the load unit comprises a load, a second switch module, a current limiting resistor and a voltage induction module; the second switch module is connected in series with the current limiting resistor and then connected in parallel with the load, and is used for adjusting the magnitude of load current fed back to the power supply unit; the voltage induction module is used for inducing a voltage waveform input by the power supply unit; the output end of the voltage induction module is connected with the second switch module; the second switch module is used for generating a current waveform. Based on a two-wire power supply remote control device, a two-wire power supply remote control method and an electric device are also provided. The electrical apparatus includes a two-wire power supply remote control device. According to the invention, the voltage and current waveforms of the power supply unit and the load unit are regulated by adding the communication interval in the cable, so that the purpose of information transmission is achieved, and the opening and closing actions of electric power are controlled. The number of cables required for direct current power transmission is reduced, an improved power loop structure is simplified, the reliability of the system is improved, and the design complexity is simplified.
Drawings
FIG. 1 is a schematic diagram of a prior art power circuit switching circuit control architecture;
fig. 2 is a schematic diagram of a two-wire power remote control device according to embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of a power supply unit in a two-wire power remote control device according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a load unit architecture in a two-wire power remote control device according to embodiment 1 of the present invention;
fig. 5 is a flowchart of a two-wire power supply remote control method applied to a power supply unit according to embodiment 2 of the present invention;
fig. 6 is a flowchart of a two-wire power supply remote control method applied to a load unit according to embodiment 2 of the present invention.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily obscure the present invention.
Example 1
The embodiment 1 of the invention provides a two-wire power supply remote control device, which is used for reducing the number of cables required for direct current power transmission, simplifying and improving a power loop structure, improving the reliability of a system and simplifying the design complexity.
In general dc power transmission, two power cables are used as a medium for power transmission, and all the cable operating time is used for transmitting power, so that if the cable operating time is extracted by 0.5-2% without affecting the load function, the capability of completing the switch control by using only two cables can be realized.
Thus, since there are two roles of communication, namely, sender and receiver, master and execution commander (Slave), the power side and the load side are discussed in two parts, the power side is closer to the Master role, and the load side is closer to the Slave role. For the role of the power supply side, the output voltage is a relatively easily controlled factor, and the voltage output side is connected in series with a switch, so that the voltage itself can be controlled to be opened or closed, further a voltage waveform is generated, the information to be communicated is encoded to the voltage waveform, and the information of the power supply side can be released to the outside. In the role of the load side, it is easy to control the load side to determine how much current is pulled, and the load side has the same ability to generate a current waveform in the process of controlling the current, encodes information to be communicated to the current waveform, and can release the information to the outside. Thus, the power source side and the load side are provided with the capability of transmitting information. As to how to receive information sent by the other party. The voltage or current measuring circuit is added according to the type of the received information.
Fig. 2 is a schematic diagram of a two-wire power remote control device according to embodiment 1 of the present invention; the device comprises a power supply unit and a load unit; the power supply unit is connected with the load unit through double cables;
the power supply unit comprises a power supply module, a first switch module and a current induction module; the first switch module is used for controlling whether the voltage of the power supply module is output or not and transmitting the output voltage waveform to the load unit; the current sensing module is used for sensing a current waveform fed back by the load unit;
the load unit comprises a load, a second switch module, a current limiting resistor and a voltage induction module; the second switch module is connected in series with the current limiting resistor and then connected in parallel with the load, and is used for adjusting the magnitude of load current fed back to the power supply unit; the voltage induction module is used for inducing a voltage waveform input by the power supply unit; the output end of the voltage induction module is connected with the second switch module; the second switch module is used for generating a current waveform.
Fig. 3 is a schematic diagram of a power supply unit architecture in a two-wire power remote control device according to embodiment 1 of the present invention;
the power supply unit further comprises a first codec; the input end of the first coder-decoder is connected with the power supply module, and the output end of the first coder-decoder is connected with the first switch module through the first gate controller;
the first codec is used for converting the voltage output by the power supply module into a digital voltage signal.
The first switch module adopts a first MOS tube;
the grid electrode of the first MOS tube is connected with a gate controller; the drain electrode of the first MOS tube is connected with the input end of the power supply module; the source electrode of the first MOS tube is connected to a load through the current sensing module.
The current sensing module is also connected with the input end of the first coder-decoder and is used for feeding back the current fed back by the load module to the first coder-decoder.
The power supply module Vout is output and then connected in series with the first switch module SWpsu, and the first switch module SWpsu is used as a main switch of a power supply, can be used as a control device for sending power supply unit information besides the function of starting and disconnecting, and is quickly cut and overlapped in a communication interval in SWpsu, so that a digital information waveform of 01010 is generated, and the power supply unit information can be sent to a load unit. In terms of power supply unit information collection, since the information sent from the load unit needs to be received, a current sensor needs to be connected in series to the SWpsu loop of the first switch module, so as to receive the current digital information waveform generated by the load unit.
Fig. 4 is a schematic diagram of a load unit architecture in a two-wire power remote control device according to embodiment 1 of the present invention.
The load unit further comprises a capacitor; the capacitor is connected across the load and used for ensuring that the power supply of the load is not interrupted.
The load unit further comprises a diode; the current sensing module is connected with the anode of a diode, and the cathode of the diode is connected with the other end of the load.
The load unit further comprises a second codec; the input end of the second coder-decoder is connected with the voltage induction module and is used for coding and decoding the digital voltage signal input by the power supply unit; the output end of the second codec is connected to the input end of the second switch module.
The second switch module adopts a second MOS tube; the grid electrode of the second MOS tube is connected with a second gate controller; the source electrode of the second MOS tube is connected to one end of the load through the current limiting resistor, the drain electrode of the second MOS tube is connected to the anode of the diode, and the cathode of the diode is connected to the other end of the load.
The load unit cannot cause power failure of the original load due to the communication section, and even if the communication section is quite short, a capacitor is present at the original load input end, and power is required to be supplied in the communication section. And a diode is connected in series to avoid reverse charging, so that the original power supply can generate a power failure phenomenon because of adding a communication interval, and the original power function is basically ensured through the operation. In order to make the load unit have the function of sending information, a large current surge is generated in the communication interval by adjusting the load current, the transmission cable has 01010 digital current information waveform on line, a switch SWload and a current limiting group Rtx are connected across the upper side and the lower side of the load unit so that the circuit is not short-circuited, the on-line load current of the transmission cable can be adjusted in the communication interval, and the information is sent to the power supply unit for communication in the form of current fluctuation waveform. Finally, because the voltage waveform information sent by the power supply unit needs to be received, a voltage sense side Vsense is added at the forefront side of the load and used for sensing the voltage change of the cable on line so as to receive the information sent by the power supply side. In this way, the transmission and reception of information between the power supply unit and the load unit is achieved.
According to the two-wire power supply remote control device provided by the embodiment 1 of the invention, the voltage and current waveforms of the power supply unit and the load unit are regulated by adding the communication interval in the cable so as to achieve the purpose of information transmission, and further, the opening and closing actions of electric power are controlled. The number of cables required for DC power transmission is reduced, the improved power loop structure is simplified, the system reliability is improved, and the design complexity is simplified.
Example 2
The embodiment 1 of the invention provides a two-wire power supply remote control device. The embodiment 2 of the invention also provides a remote control method of the double-wire power supply.
A two-wire power supply remote control device comprises a power supply unit and a load unit; the power supply unit is connected with the load unit through double cables;
the power supply unit comprises a power supply module, a first switch module and a current induction module; the first switch module is used for controlling whether the voltage of the power supply module is output or not and transmitting the output voltage waveform to the load unit; the current sensing module is used for sensing a current waveform fed back by the load unit;
the load unit comprises a load, a second switch module, a current limiting resistor and a voltage induction module; the second switch module is connected in series with the current limiting resistor and then connected in parallel with the load, and is used for adjusting the magnitude of load current fed back to the power supply unit; the voltage induction module is used for inducing a voltage waveform input by the power supply unit; the output end of the voltage induction module is connected with the second switch module; the second switch module is used for generating a current waveform.
Fig. 5 is a flowchart of a two-wire power supply remote control method applied to a power supply unit according to embodiment 2 of the present invention;
in step S500, the output of the voltage waveform to the load unit is controlled by the first switch module in the power supply unit;
in step S510, a current waveform generated based on the voltage waveform output received by the load unit is sensed to adjust the voltage output of the power supply unit.
The power supply module Vout is output and then connected in series with the first switch module SWpsu, and the first switch module SWpsu is used as a main switch of a power supply, can be used as a control device for sending power supply unit information besides the function of starting and disconnecting, and is quickly cut and overlapped in a communication interval in SWpsu, so that a digital information waveform of 01010 is generated, and the power supply unit information can be sent to a load unit. In terms of power supply unit information collection, since the information sent from the load unit needs to be received, a current sensor needs to be connected in series to the SWpsu loop of the first switch module, so as to receive the current digital information waveform generated by the load unit.
Fig. 6 is a flowchart of a two-wire power supply remote control method applied to a load unit according to embodiment 2 of the present invention.
In step S600, a voltage waveform from a power supply unit is received;
in step S610, a current waveform is generated by a second switch module in the load unit according to the voltage waveform, and is fed back to the power supply unit.
The load unit cannot cause power failure of the original load due to the communication section, and even if the communication section is quite short, a capacitor is present at the original load input end, and power is required to be supplied in the communication section. And a diode is connected in series to avoid reverse charging, so that the original power supply can generate a power failure phenomenon because of adding a communication interval, and the original power function is basically ensured through the operation. In order to make the load unit have the function of sending information, a large current surge is generated in the communication interval by adjusting the load current, the transmission cable has 01010 digital current information waveform on line, a switch SWload and a current limiting group Rtx are connected across the upper side and the lower side of the load unit so that the circuit is not short-circuited, the on-line load current of the transmission cable can be adjusted in the communication interval, and the information is sent to the power supply unit for communication in the form of current fluctuation waveform. Finally, because the voltage waveform information sent by the power supply unit needs to be received, a voltage sense side Vsense is added at the forefront side of the load and used for sensing the voltage change of the cable on line so as to receive the information sent by the power supply side. In this way, the transmission and reception of information between the power supply unit and the load unit is achieved.
According to the two-wire power supply remote control method provided by the embodiment 2 of the invention, the voltage and current waveforms of the power supply unit and the load unit are regulated by adding the communication interval in the cable so as to achieve the purpose of information transmission, and further, the opening and closing actions of the power are controlled. The number of cables required for DC power transmission is reduced, the improved power loop structure is simplified, the system reliability is improved, and the design complexity is simplified.
Example 3
Based on the two-wire power supply remote control device proposed in embodiment 1 of the present invention, embodiment 3 of the present invention proposes an electrical apparatus including a two-wire power supply remote control device therein, and the electrical apparatus includes a server.
Fig. 2 is a schematic diagram of a two-wire power remote control device according to embodiment 1 of the present invention; the device comprises a power supply unit and a load unit; the power supply unit is connected with the load unit through double cables;
the power supply unit comprises a power supply module, a first switch module and a current induction module; the first switch module is used for controlling whether the voltage of the power supply module is output or not and transmitting the output voltage to the load unit; the current sensing module is used for sensing a current signal fed back by the load unit;
the load unit comprises a load, a second switch module, a current limiting resistor and a voltage induction module; the second switch module is connected in series with the current limiting resistor and then connected in parallel with the load, and is used for adjusting the magnitude of load current fed back to the power supply unit; the voltage induction module is used for inducing the voltage input by the power supply unit; and the output end of the voltage induction module is connected with the control end of the second switch module and used for controlling the second switch module to be opened or closed.
Fig. 3 is a schematic diagram of a power supply unit architecture in a two-wire power remote control device according to embodiment 1 of the present invention;
the power supply unit further comprises a first codec; the input end of the first coder-decoder is connected with the power supply module, and the output end of the first coder-decoder is connected with the first switch module through the first gate controller;
the first codec is used for converting the voltage output by the power supply module into a digital voltage signal.
The first switch module adopts a first MOS tube;
the grid electrode of the first MOS tube is connected with a gate controller; the drain electrode of the first MOS tube is connected with the input end of the power supply module; the source electrode of the first MOS tube is connected to a load through the current sensing module.
The current sensing module is also connected with the input end of the first coder-decoder and is used for feeding back the current fed back by the load module to the first coder-decoder.
The power supply module Vout is output and then connected in series with the first switch module SWpsu, so that the SWpsu is used as a main switch of a power supply, and can be used as a control device for sending power supply unit information, and in a communication interval of SWpsu, digital information waveforms of 01010 are manufactured, so that the power supply unit information can be sent to a load unit. In terms of power supply unit information collection, since the information sent from the load unit needs to be received, a current sensor is necessary to be connected in series to the SWpsu loop of the first switch module, so as to receive the current digital information waveform generated by the load unit.
Fig. 4 is a schematic diagram of a load unit architecture in a two-wire power remote control device according to embodiment 1 of the present invention.
The load unit further comprises a capacitor; the capacitor is connected across the two ends of the load in a bridging way and is used for ensuring that the power supply of the load is not interrupted.
The load unit further comprises a diode; the current sensing module is connected with the anode of a diode, and the cathode of the diode is connected with the other end of the load.
The load unit further comprises a second codec; the input end of the second coder-decoder is connected with the voltage induction module and is used for coding and decoding the digital voltage signal input by the power supply unit; the output end of the second codec is connected to the input end of the second switch module.
The second switch module adopts a second MOS tube; the grid electrode of the second MOS tube is connected with a second gate controller; the source electrode of the second MOS tube is connected to one end of the load through the current limiting resistor, the drain electrode of the second MOS tube is connected to the anode of the diode, and the cathode of the diode is connected to the other end of the load.
The load unit cannot cause power failure of the original load due to the communication section, and even if the communication section is quite short, a capacitor is present at the original load input end, and power is required to be supplied in the communication section. And a diode is connected in series to avoid reverse charging, so that the original power supply can generate a power failure phenomenon because of adding a communication interval, and the original power function is basically ensured through the operation. In order to make the load unit have the function of sending information, a large current surge is generated in the communication interval by adjusting the load current, the transmission cable has 01010 digital current information waveform on line, a switch SWload and a current limiting group Rtx are connected across the upper side and the lower side of the load unit so as not to be short-circuited, the on-line load current of the transmission cable can be adjusted in the communication interval, and the information is sent to the power supply unit for communication in the form of current fluctuation waveform. Finally, because the voltage waveform information sent by the power supply unit needs to be received, a voltage sense side Vsense is added at the forefront side of the load and used for sensing the voltage change of the cable on line so as to receive the information sent by the power supply side. In this way, the transmission and reception of information between the power supply unit and the load unit is achieved.
According to the electrical equipment provided by the embodiment 2 of the invention, the voltage and current waveforms of the power supply unit and the load unit are regulated by adding the communication interval to the cable so as to achieve the purpose of information transmission, and further, the opening and closing actions of the power are controlled. The number of cables required for DC power transmission is reduced, the improved power loop structure is simplified, the system reliability is improved, and the design complexity is simplified.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is inherent to. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. In addition, the parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of the corresponding technical solutions in the prior art, are not described in detail, so that redundant descriptions are avoided.
While the specific embodiments of the present invention have been described above with reference to the drawings, the scope of the present invention is not limited thereto. Other modifications and variations to the present invention will be apparent to those of skill in the art upon review of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. On the basis of the technical scheme of the invention, various modifications or variations which can be made by the person skilled in the art without the need of creative efforts are still within the protection scope of the invention.
Claims (8)
1. The two-wire power supply remote control device is characterized by comprising a power supply unit and a load unit; the power supply unit is connected with the load unit through double cables;
the power supply unit comprises a power supply module, a first switch module and a current induction module; the first switch module is used for controlling whether the voltage of the power supply module is output or not and transmitting the output voltage waveform to the load unit; the current sensing module is used for sensing a current waveform fed back by the load unit;
the load unit comprises a load, a second switch module, a current limiting resistor and a voltage induction module; the second switch module is connected in series with the current limiting resistor and then connected in parallel with the load, and is used for adjusting the magnitude of load current fed back to the power supply unit; the voltage induction module is used for inducing a voltage waveform input by the power supply unit; the output end of the voltage induction module is connected with the second switch module; the second switch module is used for generating a current waveform; the load unit further comprises a capacitor; the capacitor is connected across the two ends of the load in a bridging way and is used for ensuring that the power supply of the load is not interrupted;
the power supply unit further comprises a first codec; the input end of the first coder-decoder is connected with the power supply module, and the output end of the first coder-decoder is connected with the first switch module through the first gate controller; the first coder-decoder is used for converting the voltage output by the power supply module into a digital voltage signal; the first switch module is used as a main switch of the power supply, and can be used as a control device for sending power supply unit information besides the function of turning on and off; the first switch module is switched rapidly in a communication interval to generate 01010 digital information waveforms, and then the power supply unit information can be sent to the load unit.
2. The two-wire power supply remote control device of claim 1, wherein the first switch module is a first MOS transistor;
the grid electrode of the first MOS tube is connected with a gate controller; the drain electrode of the first MOS tube is connected with the input end of the power supply module; the source electrode of the first MOS tube is connected to a load through the current sensing module.
3. The two-wire power supply remote control device of claim 1, wherein the current sensing module is further coupled to an input of the first codec for feeding current fed back by the load module back to the first codec.
4. The two-wire power supply remote control of claim 1, wherein the load unit further comprises a second codec;
the input end of the second coder-decoder is connected with the voltage induction module and is used for coding and decoding the digital voltage signal input by the power supply unit; the output end of the second coder-decoder is connected to the control end of the second switch module.
5. The two-wire power supply remote control device according to claim 1, wherein the second switch module is a second MOS transistor;
the grid electrode of the second MOS tube is connected with a second gate controller; the source electrode of the second MOS tube is connected to one end of the load through the current limiting resistor, the drain electrode of the second MOS tube is connected to the anode of the diode, and the cathode of the diode is connected to the other end of the load.
6. A two-wire power supply remote control method, implemented on the basis of a two-wire power supply remote control device according to any one of claims 1 to 5, characterized by being applied to a power supply unit, comprising the steps of:
controlling output of a voltage waveform to a load unit through a first switch module in the power supply unit;
the current waveform generated based on the voltage waveform output received by the load unit is sensed to adjust the voltage output of the power supply unit.
7. A two-wire power supply remote control method, implemented based on a two-wire power supply remote control device according to any one of claims 1 to 5, characterized by being applied to a load unit, comprising the steps of:
receiving a voltage waveform from a power supply unit;
and generating a current waveform through a second switch module in the load unit according to the voltage waveform, and feeding back the current waveform to the power supply unit.
8. An electrical apparatus comprising a two-wire power supply remote control device as claimed in any one of claims 1 to 5.
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| CN202210328553.4A CN114678955B (en) | 2022-03-31 | 2022-03-31 | Double-wire power supply remote control device, control method and electric equipment |
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| CN1855827A (en) * | 2005-04-19 | 2006-11-01 | 华为技术有限公司 | Remote electric power supplying system and its control |
| CN204069002U (en) * | 2014-09-12 | 2014-12-31 | 绵阳灵通电讯设备有限公司 | Based on number, the electric simultaneous interpretation device of insulate line remote auto power supply technique |
| CN105191039A (en) * | 2012-12-07 | 2015-12-23 | 沃尔特瑟弗儿公司 | Power distribution system with testing of transmission line |
| CN112310938A (en) * | 2019-07-31 | 2021-02-02 | 华为技术有限公司 | Local side equipment, power supply system, electric shock protection method and device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1855827A (en) * | 2005-04-19 | 2006-11-01 | 华为技术有限公司 | Remote electric power supplying system and its control |
| CN105191039A (en) * | 2012-12-07 | 2015-12-23 | 沃尔特瑟弗儿公司 | Power distribution system with testing of transmission line |
| CN204069002U (en) * | 2014-09-12 | 2014-12-31 | 绵阳灵通电讯设备有限公司 | Based on number, the electric simultaneous interpretation device of insulate line remote auto power supply technique |
| CN112310938A (en) * | 2019-07-31 | 2021-02-02 | 华为技术有限公司 | Local side equipment, power supply system, electric shock protection method and device |
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| CN114678955A (en) | 2022-06-28 |
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