CN220139414U - Power supply distribution circuit - Google Patents
Power supply distribution circuit Download PDFInfo
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- CN220139414U CN220139414U CN202321508898.4U CN202321508898U CN220139414U CN 220139414 U CN220139414 U CN 220139414U CN 202321508898 U CN202321508898 U CN 202321508898U CN 220139414 U CN220139414 U CN 220139414U
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Abstract
The utility model provides a power distribution circuit, which comprises a power input module, a plurality of power management modules and a power output module, wherein the power input module is connected with the power management modules; the power input module is used for providing a power supply; each power management module is connected with the power input module and comprises a power management chip, wherein the power management chip is used for carrying out short-circuit protection and short-circuit automatic recovery on the power supply; the power output module is connected with the power management module and is used for multiplexing the power supply through each power management module. The power supply distribution circuit can realize multi-path power supply distribution and realize the independence of each path of power supply.
Description
Technical Field
The present utility model relates to the field of electronic circuits, and in particular, to a power distribution circuit.
Background
The distributed control system (Distributed Control System, DCS) is also called as a distributed control system, which is a multi-stage computer control system with a communication network as a link and is composed of a process control stage and a process monitoring stage, and integrates the technologies of computer, communication, display, control and the like.
In industrial automation, a DCS system is a control system commonly used, and is a core part for realizing industrial automation operation. As shown in FIG. 1, the DCS system in the prior art is composed of an operation layer, a control layer and a distributed I/O module, and has good openness and expandability. The operation station mainly completes the configuration, operation and monitoring functions of the system, is used for displaying the data of the controller and sending control commands to the controller, and the visual graphical interface is operated on the operation station and is realized through engineering nodes required by the operation of the monitor program. The controller plays a role in the whole system, and is mainly used for data acquisition and processing control of the control system and data transmission and exchange with the operation station, and control output of the I/O module is carried out according to a control instruction sent by the operation station. The controller is a device for realizing the control function of the system and consists of an embedded industrial control computer and control software. The I/O module is an intelligent module, is a signal conversion processing unit, is divided into an analog input/output module and a digital input/output module, and is responsible for inputting or outputting signals to field instruments and equipment.
The switching value Input (DI) module in the I/O module is responsible for inputting and detecting the state of the field switching value. When the field is a contact signal, the DI module is required to provide 24V external power. The external power supply is often short-circuited due to complex field conditions, so that the power supply part of the DI module is burnt out, and even the power supply of the whole DCS system is affected. To solve the above problems, a disposable fuse with a base is generally provided, which burns the power supply channel corresponding to the DI module to protect the entire power supply system when short-circuited. However, after the fuse is burned, the corresponding DI module stops working, and needs to be manually searched for replacement, resulting in complicated operation.
A power distribution module for the DI module is designed. Each channel corresponds to a DI module that is powered. And when a short circuit fault occurs, the power supply is automatically disconnected to protect the DI module.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, an object of the present utility model is to provide a power distribution circuit capable of realizing multiple power distribution and independence of each power supply.
To achieve the above and other related objects, the present utility model provides a power distribution circuit, including a power input module, a plurality of power management modules, and a power output module; the power input module is used for providing a power supply; each power management module is connected with the power input module and comprises a power management chip, wherein the power management chip is used for carrying out short-circuit protection and short-circuit automatic recovery on the power supply; the power output module is connected with the power management module and is used for multiplexing the power supply through each power management module.
In an embodiment of the utility model, the power input module includes a first power supply and a second power supply; the first power supply is connected with the second power supply in parallel.
In an embodiment of the utility model, the power input module further includes a voltage stabilizing tube, one end of the voltage stabilizing tube is grounded, and the other end of the voltage stabilizing tube is connected to the first power supply and the second power supply.
In an embodiment of the utility model, the power management chip is further configured to perform overvoltage protection on the power supply.
In an embodiment of the utility model, the power management chip is further configured to perform under-voltage protection on the power supply. In an embodiment of the present utility model, the power management module further includes an alarm module, configured to send an indication when the output of the power management module is normal.
In an embodiment of the utility model, the alarm module includes a resistor and a light emitting diode; the resistor and the light emitting diode are connected in series between the output end of the power management module and the ground end.
In an embodiment of the present utility model, the power distribution circuit is applied to a DCS control system, and a switching value input module of the DCS control system is connected to one power supply of the power output module.
As described above, the power distribution circuit of the present utility model has the following advantages:
(1) The multi-path power supply distribution can be realized, and the independence of each path of power supply can be realized;
(2) The external power supply can be automatically disconnected when the field is short-circuited, and the power supply is recovered after the fault disappears, so that manual operation is not needed, the operation is greatly simplified, and the practicability is improved;
(3) The overvoltage protection and the undervoltage protection can be carried out on each branch power supply, and an alarm can be sent out in time;
(4) The method is particularly suitable for DI module power supply in DSC system.
Drawings
FIG. 1 is a schematic diagram of a DCS system according to the prior art in one embodiment;
FIG. 2 is a schematic diagram of a power distribution circuit according to an embodiment of the utility model;
FIG. 3 is a schematic diagram of a power input module according to an embodiment of the utility model;
FIG. 4 is a schematic diagram of a power management module according to an embodiment of the utility model;
fig. 5 is a schematic structural diagram of an alarm module according to an embodiment of the utility model.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
The power supply distribution circuit of the utility model distributes the power supply in a multipath manner, realizes independent power supply of each power supply, can automatically cut off external power supply when the branch power supply is short-circuited, and recovers the power supply after the fault disappears, thus the utility model does not need manual operation, greatly simplifies the operation and has practicability.
As shown in fig. 2, in an embodiment, the power distribution circuit of the present utility model includes a power input module 1, a plurality of power management modules 2 and a power output module 3.
The power input module 1 is used for providing power supply. In an embodiment, the power input module includes a first power supply and a second power supply; the first power supply is connected with the second power supply in parallel. The stability of the power supply can be ensured by the parallel connection of the two paths of power supplies. Even if one power supply voltage is damaged, the other power supply can still work normally. Preferably, as shown in fig. 3, the power input module 1 adopts two parallel 24V power supplies. Further, the power input module further comprises a voltage stabilizing tube VZ1, one end of the voltage stabilizing tube VZ1 is grounded, and the other end of the voltage stabilizing tube VZ1 is connected with the first power supply and the second power supply, so that overvoltage protection is achieved.
Each power management module 2 is connected to the power input module 1. The power management module 2 comprises a power management chip, and the power management chip is used for carrying out short circuit protection and short circuit automatic recovery on the power supply. Wherein the structure of each power management module 2 is identical. When the power supply through the power supply management module is short-circuited, the power supply management chip cuts off the power supply output; when the short circuit problem is solved, the power management chip resumes the power supply output. Preferably, the power management chip is further used for performing overvoltage protection and undervoltage protection on the power supply. When the power supply passing through the power supply management module is in overvoltage/undervoltage, the power supply management chip cuts off the power supply output; and after the power supply is recovered to be normal, the power supply management chip recovers the power supply output.
In one embodiment, the power management module 2 is shown in fig. 4. Wherein U1 is a power management chip, and can realize overvoltage protection, undervoltage protection, short circuit protection and automatic recovery functions. R31 is used to set a threshold for short circuit or over-current protection; r1, R13, R71 are used to set the voltage thresholds for over-voltage and under-voltage protection.
In an embodiment of the present utility model, as shown in fig. 5, the power management module further includes an alarm module, configured to send an indication when the output of the power management module is normal. Wherein the alarm module comprises a resistor and a light emitting diode; the resistor and the light emitting diode are connected in series between the output end of the power management module and the ground end. When the output of the power management module is normal, the light emitting diode emits light; when the output of the power management module is abnormal, the light emitting diode is turned off, so that the state of each power management module can be accurately judged, and the positioning can be accurately and timely carried out.
Preferably, the power management module 2 has 16 paths, so as to meet the power supply requirement in the practical application scene.
The power output module 3 is connected with the power management module 2 and is used for multiplexing the power supply through each power management module, thereby realizing the provision of multiplexing power supply and meeting the power supply requirements of different modules.
Preferably, the power distribution circuit is applied to a DCS control system, and the switching value input module of the DCS control system is connected to one power supply of the power output module, so that the power distribution circuit provides mutually independent power supplies for all the switching value input modules, can accurately position abnormal switching value power supplies of the power supplies, and meets the power supply requirement of the DCS control system.
In summary, the power distribution circuit of the utility model can realize multi-path power distribution and realize the independence of each path of power; the external power supply can be automatically disconnected when the field is short-circuited, and the power supply is recovered after the fault disappears, so that manual operation is not needed, the operation is greatly simplified, and the practicability is improved; the overvoltage protection and the undervoltage protection can be carried out on each branch power supply, and an alarm can be sent out in time; the method is particularly suitable for DI module power supply in DSC system. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (8)
1. A power distribution circuit, characterized by: the power supply comprises a power supply input module, a plurality of power supply management modules and a power supply output module;
the power input module is used for providing a power supply;
each power management module is connected with the power input module and comprises a power management chip, wherein the power management chip is used for carrying out short-circuit protection and short-circuit automatic recovery on the power supply;
the power output module is connected with the power management module and is used for multiplexing the power supply through each power management module.
2. The power distribution circuit of claim 1 wherein: the power input module comprises a first power supply and a second power supply; the first power supply is connected with the second power supply in parallel.
3. The power distribution circuit of claim 2 wherein: the power input module further comprises a voltage stabilizing tube, one end of the voltage stabilizing tube is grounded, and the other end of the voltage stabilizing tube is connected with the first power supply and the second power supply.
4. The power distribution circuit of claim 1 wherein: the power management chip is also used for overvoltage protection of the power supply.
5. The power distribution circuit of claim 1 wherein: the power management chip is also used for carrying out under-voltage protection on the power supply.
6. The power distribution circuit of claim 1 wherein: the power management module also comprises an alarm module which is used for sending out an instruction when the output of the power management module is normal.
7. The power distribution circuit of claim 6 wherein: the alarm module comprises a resistor and a light emitting diode;
the resistor and the light emitting diode are connected in series between the output end of the power management module and the ground end.
8. The power distribution circuit of claim 1 wherein: the power distribution circuit is applied to a DCS control system, and a switching value input module of the DCS control system is connected to one power supply of the power output module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321508898.4U CN220139414U (en) | 2023-06-14 | 2023-06-14 | Power supply distribution circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321508898.4U CN220139414U (en) | 2023-06-14 | 2023-06-14 | Power supply distribution circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220139414U true CN220139414U (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321508898.4U Active CN220139414U (en) | 2023-06-14 | 2023-06-14 | Power supply distribution circuit |
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| Country | Link |
|---|---|
| CN (1) | CN220139414U (en) |
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2023
- 2023-06-14 CN CN202321508898.4U patent/CN220139414U/en active Active
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