CN218526091U - Anti-interference direct current 24V power supply system - Google Patents
Anti-interference direct current 24V power supply system Download PDFInfo
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- CN218526091U CN218526091U CN202222374785.1U CN202222374785U CN218526091U CN 218526091 U CN218526091 U CN 218526091U CN 202222374785 U CN202222374785 U CN 202222374785U CN 218526091 U CN218526091 U CN 218526091U
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Abstract
The utility model relates to an anti-interference direct current 24V power supply system, which comprises a 24V power supply module, a power supply monitoring module, a supporting power supply, a DC-DC voltage stabilizing module, a switch module, a charging module, an anti-reflux module I, an anti-reflux module II and an anti-reflux module III; the input ends of the 24V power supply module, the power supply monitoring module and the charging module are connected to a city power line; the output end of the 24V power supply module is connected in series through the anti-reflux module I and then is connected to the input end of the DC-DC voltage stabilizing module; the support power supply is connected with the input end of the DC-DC voltage stabilizing module after being connected with the switch module in series through the anti-reflux module III; the output end of the DC-DC voltage stabilizing module is connected to an external direct current 24V output; the output end of the charging module is connected to the support power supply after being connected in series through the anti-reflux module II. The utility model discloses when appearing shaking the electricity, can be seamless support power output and use for equipment control system, resume normal power supply until the electric wire netting, or in the device provided the support time, interrupted to supply power and had great harm production facility, technology to make emergent processing.
Description
Technical Field
The utility model belongs to the technical field of the electron, specific theory relates to an anti-dazzling electric direct current 24V electrical power generating system.
Background
The voltage fluctuation is also called voltage convergence and flashover, and refers to the phenomenon that the effective value of the power supply voltage instantaneously falls to 10% -90% of the nominal value and returns to normal in a short time. From the end of the required power supply equipment, the power interference caused by the short-time voltage fluctuation or short-time power failure of the power grid due to lightning stroke, short circuit or other reasons is called as an external cause, and the power interference generated by the equipment power transmission device is called as an internal cause. The power transmission device refers to a device (such as a trolley line, a reversing slip ring and the like) for reversing or preventing a cable from winding, which is needed to be used when the device walks or rotates, between a power supply end and an incoming line of the electrical device.
For external reasons, because the power grid construction is more perfect, the probability of generating electricity interference is less. For internal reasons, the interference of electricity will occur at high frequency due to the influence of factors such as installation quality, use environment and inadequate maintenance of the electric transmission device, and the interference cannot be predicted in actual production. Taking a travelling crane trolley line as an example, if dust is large in the use environment and dust is accumulated on the trolley line for a long time, the contact resistance between the sliding block and the trolley line is increased directly, and an open circuit is formed to generate electricity interference in serious cases. After the electricity dazzling occurs, a control power supply of 24V is provided through a switching power supply or a linear stabilized voltage power supply, the electricity dazzling also follows the occurrence, when the minimum working voltage of electrical equipment and equipment is lower, the equipment cannot normally work and stops, after the electricity dazzling is finished, the restarting time of some equipment and devices is longer, and after the restarting, the running state before the electricity dazzling can not be automatically recovered due to the resetting of a control system, and the normal running can be realized only by manual operation. Therefore, the power blackout can cause unplanned shutdown, damage to equipment and serious economic loss to enterprises. For some special hazardous chemical production equipment, the shutdown can cause the production process to generate large unsafe factors such as overtemperature, overpressure and the like, and in the middle process from the shutdown to the normal operation recovery, uncontrollable factors such as whether operators are timely found, are not at the post, are skilled in operation and the like exist, so that the probability of safety accidents is increased.
In the anti-interference electricity problem solution process, some novel solutions appear, for example chinese patent application No. (CN 201520539105.4) discloses an anti-interference electricity dc power supply system, through adding the incessant dc power supply method at converter direct current 500V side, improve the low-voltage ride-through ability of converter, have certain help to the trade application, but its monitoring control unit is again controlled by PLC to its first IGBT module and second IGBT module and switch after monitoring converter direct current busbar voltage, the problem exists: the slave monitoring device detects the final IGBT switching to the direct current bus voltage of the frequency converter, so that the number of intermediate links is large, and the reliability is reduced; the frequency converter belongs to a high-frequency interference source, has large interference on the monitoring process of the voltage analog quantity of the direct-current bus of the frequency converter, and has certain influence on the voltage detection precision; the PLC adopts the working principle that the output is refreshed after the circular scanning is finished, a certain scanning period exists, the scanning period is influenced by the structure, the size and the hardware performance of a writing program, the scanning period is usually not fixed above 2mS, and the seamless switching of 0mS cannot be realized under the influence of the switching frequency response of the IGBT.
Disclosure of Invention
In order to overcome the problem that exists among the background art, the utility model provides a prevent shaking electric direct current 24V electrical power generating system, when supply voltage takes place to fall sharply in the twinkling of an eye (the electricity of shaking appears promptly), still can normally provide 24V control power, can be seamless export support power supply for equipment control system uses, resume normal power supply until the electric wire netting, or in the device provides the support time, have great harm production facility, technology to supply power to break off and make emergent the processing, reduce the safety risk.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
the anti-interference direct-current 24V power supply system comprises a 24V power supply module, a power supply monitoring module, a supporting power supply, a DC-DC voltage stabilizing module, a switch module, a charging module, an anti-reflux module I, an anti-reflux module II and an anti-reflux module III; the input ends of the 24V power supply module, the power supply monitoring module and the charging module are connected to a city power line; the output end of the 24V power supply module is connected in series through the anti-reflux module I and then is connected to the input end of the DC-DC voltage stabilizing module; the support power supply is connected with the input end of the DC-DC voltage stabilizing module after being connected with the switch module in series through the anti-reflux module III; the output end of the DC-DC voltage stabilizing module is connected to an external direct current 24V output; and the output end of the charging module is connected to a supporting power supply after being connected in series through the anti-reflux module II.
Preferably, the backflow prevention module I, the backflow prevention module II and the backflow prevention module III comprise Schottky diodes.
Preferably, the 24V power module is a power module converting commercial power AC220 or AC380V into DC 24V.
Preferably, the supporting power supply is a battery pack, and the voltage is 24V.
Preferably, the power supply monitoring module consists of a voltage monitoring relay and a time relay.
Preferably, the switch module comprises a dc contactor.
The utility model has the advantages that:
the utility model discloses a set up three anti-reflux module, can realize that there is not external intervention control between 24V power module and the support power, seamless completion is switched, and 24V power module 1 has been realized, the module 6 that charges, mutual isolation and stable work between the 3 three DC power supply of support power, effectively prevent the emergence of shaking the electricity phenomenon, and the schottky diode has the advantage that forward conduction voltage reduces, it is few to consume the electric energy on preventing the counter-current module, improve the precision of preventing shaking the electricity, furthermore, 24V power module and the seamless switching between the support power, do not produce the output power and interrupt, and the no voltage jump of switching process, can reduce DC-DC voltage stabilizing module dynamic response's requirement.
Drawings
Fig. 1 is a schematic diagram of the basic structure of the present invention;
FIG. 2 is a schematic diagram of the present invention;
in the figure, a 1-24V power supply module, a 2-power supply monitoring module, a 3-supporting power supply, a 4-DC-DC voltage stabilizing module, a 5-switch module, a 6-charging module and a 7-anti-reflux module I are arranged; 8-countercurrent prevention module II and 9-countercurrent prevention module III.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.
As shown in fig. 1, the anti-interference DC24V power supply system includes a 24V power supply module 1, a power supply monitoring module 2, a support power supply 3, a DC-DC voltage stabilizing module 4, a switch module 5, an anti-backflow module and a charging module 6.
The 24V power module 1, the power monitoring module 2 and the input end of the charging module 6 are connected to a city power line, the output end of the 24V power module 1 is connected to the input end of the DC-DC voltage stabilizing module 4 after being connected with the anti-reflux module I7 in series, the supporting power supply 3 is connected to the input end of the DC-DC voltage stabilizing module 4 after being connected with the switch module 5 in series through the anti-reflux module III 9, the output end of the DC-DC voltage stabilizing module 4 is connected to the external direct current 24V output, and the output end of the charging module 6 is connected to the supporting power supply 3 after being connected with the anti-reflux module II 8 in series.
The 24V power supply module 1 is a switching power supply or a linear voltage-stabilized power supply, and is used for converting mains supply AC220 or AC380V into DC24V power supply.
The power monitoring module 2 includes a voltage monitoring relay and a time relay, and is used for monitoring whether the voltage input by the external commercial power is effective and controlling the switch module 5. The range of the voltage of the external utility power is determined according to the allowable utility power input voltage range of the 24V power module 1.
The DC-DC voltage stabilizing module 4 is used for outputting the voltage stabilized by the direct current 24V and is used for solving the problem that the battery pack in the support power supply 3 has a large output voltage variation range and cannot meet the high-precision requirement of power supply equipment.
The three anti-reflux modules are arranged, wherein an anti-reflux module I7 is arranged on a direct-current power supply transmission line between the 24V power supply module 1 and the DC-DC voltage stabilizing module 4; a reverse flow prevention module II 8 is arranged on a connecting circuit between the charging module 6 and the support power supply 3; and a direct current power supply transmission line between the support power supply 3 and the DC-DC voltage stabilizing module 4 is provided with an anti-reflux module III 9. The three anti-reflux modules are Schottky diodes with high switching frequency, low voltage and high rated current. By setting the voltage at the input end of the three anti-reflux modules, the seamless switching between the 24V power module 1 and the support power supply 3 without external intervention control can be realized, and the mutual isolation and stable work among the three direct current power supplies (the 24V power module 1, the charging module 6 and the support power supply 3) can be realized. Due to the seamless switching of the 24V power supply module 1 and the supporting power supply 3, no output power supply interruption is generated, and no voltage jump occurs in the switching process, so that the requirement of dynamic response of the DC-DC voltage stabilizing module 4 can be reduced.
The utility model discloses a working process:
the utility model discloses utilize schottky diode's one-way conductivity, at 24V power module 1, the module 6 charges, it prevents the adverse current module to set up between 3 three DC power supply of support source, the voltage value according to supporting 3 maximum outputs of power supply adjusts 24V power module 1 and the output voltage value of the module 6 that charges respectively again, the output voltage difference that makes 24V power module 1 output voltage and support source 3 is greater than 2 times schottky diode forward voltage drop, the output voltage of the module 6 that charges and the output voltage difference that supports source 3 are greater than 1 times schottky diode forward voltage drop, realize that there is not external intervention control between 24V power module 1 and the support source 3, seamless completion switches, realize mutual isolation and the steady job between the three DC power supply. The voltage variation range of the output voltage of the storage battery or the lithium battery in the supporting power supply 3 from full charge to discharge is large, generally more than 8V, and the DC-DC voltage stabilizing module 4 with the functions of automatic voltage boosting, voltage reduction and voltage stabilization is added to meet the precision requirement of the fluctuation +/-0.5V of the output voltage of the anti-interference direct current 24V power supply system.
The utility model discloses there are following four kinds of operating modes in actual work: 1) Starting an anti-interference direct-current 24V power supply system when power supply equipment is powered on and ready to be put into operation; 2) The power supply equipment operates when the power supply is normal; 3) When electricity interference occurs, the power supply of the 24V power supply module 1 and the power supply of the support power supply 3 are switched; 4) And when the power supply is cut off after the power supply equipment is normally shut down, the anti-interference direct current 24V power supply system is closed. The working process under each working condition is as follows:
in the working condition 1), the 24V power supply module 1 starts to output a 24V direct-current power supply, and the 24V direct-current power supply is stabilized by the backflow prevention module I7 and the DC-DC voltage stabilization module 4 and then is supplied to an output end to provide a 24V direct-current power supply for required power supply equipment. After the power monitoring module 2 monitors that the voltage of the externally input mains supply is effective, the switch module 5 is controlled to be switched on, preparation for putting the power supply 3 into operation is made, and the switching-on and switching-off speed of the switch module 5 has no requirement.
In working condition 2), the charging module 6 charges the support power supply 3 to ensure that the support power supply 3 outputs electric energy when the electric dazzling occurs. The output voltage of the 24V power supply module 1 is 0.6V higher than that of the support power supply 3, the backflow prevention module III 9 is in a reverse cut-off state, and the support power supply 3 cannot output current to an output end and cannot reversely flow into the 24V power supply module 1.
The output voltage of the 24V power module 1 is 0.3V higher than that of the charging module 6, the anti-backflow module II 8 and the anti-backflow module III 9 are in a reverse cut-off state, and the charging module 6 cannot output current to the output end and cannot reversely flow into the 24V power module 1.
In the working condition 3), when the voltage interference occurs, the output voltage of the 24V power supply module 1 starts to drop, and when the amplitude is reduced by 0.6V and the voltage of the support power supply 3 is equal, the backflow prevention module III 9 is in a critical state from cut-off to conduction.
The output voltage of the 24V power supply module 1 continues to drop, when the output voltage is smaller than the amplitude of the support power supply of 0.6V, the reverse cut-off of the reverse flow prevention module I7 and the forward conduction of the reverse flow prevention module III 9 are achieved, at the moment, the output end only provides electric energy through the support power supply 3, and the support power supply 3 cannot reversely flow into the 24V power supply module 1.
The output voltage of the charging module 6 is reduced due to the reduction of the external power supply voltage like the 24V power supply module 1, and when the output voltage is smaller than the supporting power supply 30.3V amplitude, the anti-backflow module II 8 is in a reverse cut-off state, and the supporting power supply 3 cannot reversely flow into the charging module 6.
Starting the power supply monitoring module II from the beginning of power interference, starting timing by a timer in the power supply monitoring module II, and when the time used from the occurrence to the end of the power interference is less than the set time of the timer, switching the anti-power interference direct-current 24V power supply system into a working condition 2) state to continuously output a 24V direct-current power supply.
In the working condition 4), when the power supply is cut off after the required power supply equipment is normally shut down, the anti-interference direct current 24V power supply system is switched into the working condition 3) state due to the interruption of power supply, and the 24V power supply is continuously output.
The timer in the power supply monitoring module II starts timing from power-off, and when the power-off time is longer than the set time of the timer, the power supply monitoring module II sends a brake-off instruction to the switch module 5 to cut off the output of the support power supply 3, so that the damage of an internal battery pack caused by over-discharge of the support power supply 3 is avoided, and the anti-interference direct-current 24V power supply system is switched to a shutdown state.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides an anti-interference electric DC24V electrical power generating system which characterized in that: the device comprises a 24V power supply module, a power supply monitoring module, a supporting power supply, a DC-DC voltage stabilizing module, a switch module, a charging module, an anti-reflux module I, an anti-reflux module II and an anti-reflux module III; the input ends of the 24V power supply module, the power supply monitoring module and the charging module are connected to a city power line; the output end of the 24V power supply module is connected in series through the anti-reflux module I and then is connected to the input end of the DC-DC voltage stabilizing module; the support power supply is connected with the input end of the DC-DC voltage stabilizing module after being connected with the switch module in series through the anti-reflux module III; the output end of the DC-DC voltage stabilizing module is connected to an external direct current 24V output; and the output end of the charging module is connected to a support power supply after being connected in series through the anti-reflux module II.
2. The anti-interference direct current 24V power supply system according to claim 1, characterized in that: and the anti-reflux module I, the anti-reflux module II and the anti-reflux module III are Schottky diodes.
3. The anti-interference direct current 24V power supply system according to claim 1, characterized in that: the 24V power supply module is a power supply module which converts commercial power AC220 or AC380V into DC 24V.
4. The anti-interference direct current 24V power supply system according to claim 1, characterized in that: the supporting power supply is a battery pack, and the voltage is 24V.
5. The anti-interference direct current 24V power supply system according to claim 1, characterized in that: the power supply monitoring module consists of a voltage monitoring relay and a time relay.
6. The anti-interference direct current 24V power supply system according to claim 1, characterized in that: the switch module comprises a direct current contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222374785.1U CN218526091U (en) | 2022-09-07 | 2022-09-07 | Anti-interference direct current 24V power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222374785.1U CN218526091U (en) | 2022-09-07 | 2022-09-07 | Anti-interference direct current 24V power supply system |
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| CN218526091U true CN218526091U (en) | 2023-02-24 |
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| CN202222374785.1U Active CN218526091U (en) | 2022-09-07 | 2022-09-07 | Anti-interference direct current 24V power supply system |
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- 2022-09-07 CN CN202222374785.1U patent/CN218526091U/en active Active
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