CN217984517U - System for protecting power supply after short circuit of silicon controlled rectifier - Google Patents
System for protecting power supply after short circuit of silicon controlled rectifier Download PDFInfo
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- CN217984517U CN217984517U CN202221732949.7U CN202221732949U CN217984517U CN 217984517 U CN217984517 U CN 217984517U CN 202221732949 U CN202221732949 U CN 202221732949U CN 217984517 U CN217984517 U CN 217984517U
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Abstract
The utility model discloses a belong to power protection technical field, specifically be a system for protecting power after silicon controlled rectifier short circuit, including full-bridge switch circuit, install switch K on the full-bridge switch circuit, switch K is used for cuting full-bridge switch circuit's input; still include central processing unit, central processing unit electric connection has control module, signal transmission module and prestores the module, control module electric connection has the contrast module, signal transmission module electric connection has sampling module, the beneficial effects of the utility model are that: through setting up central processing unit, sampling module, control module, signal transmission module and contrast module, can monitor the electric current in the full-bridge switch circuit, in case when taking place the short circuit of thyristor, can self-closing full-bridge switch circuit to make the power out of work, realized the protection to the power, prolonged the life of power.
Description
Technical Field
The utility model relates to a power protection technical field specifically is a system for protecting power after silicon controlled rectifier short circuit.
Background
The output of the switching power supply is kilovolt high voltage, the rear thyristor works in parallel, and sometimes the thyristor is poor to cause short circuit of the whole output. The prior art realizes power protection after the short circuit of the silicon controlled rectifier circuit by using a pure hardware structure, cannot ensure intelligent power protection, and has complex hardware structure and high cost.
SUMMERY OF THE UTILITY MODEL
In view of the problem that exists in the system of carrying out the protection to the power behind the current silicon controlled rectifier short circuit, provided the utility model discloses.
Therefore, the utility model aims at providing a system for protecting the power after the silicon controlled rectifier short circuit has solved present technique and has utilized pure hardware structure to realize the power protection after the silicon controlled rectifier circuit short circuit, can not guarantee intelligent protection power, and hardware structure is complicated, problem with high costs.
In order to solve the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:
a system for protecting a power supply after a silicon controlled rectifier is in short circuit comprises a full-bridge switching circuit, wherein a switch K is installed on the full-bridge switching circuit and used for cutting off an input end of the full-bridge switching circuit; still include central processing unit, central processing unit electric connection has control module, signal transmission module and prestores the module, control module electric connection has the contrast module, signal transmission module electric connection has the sampling module.
As a preferred scheme of the system of protecting to the power behind silicon controlled rectifier short circuit, wherein: the sampling module is realized by an electronic ammeter, and the model of the electronic ammeter is set to be YR-206NR.
As a preferred scheme of a system of protecting to the power behind silicon controlled rectifier short circuit, wherein: still include alarm module, alarm module and central processing unit electric connection, central processing unit's model sets up to sharp dragon 7 5700G.
As a preferred scheme of a system of protecting to the power behind silicon controlled rectifier short circuit, wherein: the sampling module is used for monitoring the current in the full-bridge switching circuit and transmitting the monitored current data to the central processing unit.
As a preferred scheme of the system of protecting to the power behind silicon controlled rectifier short circuit, wherein: the sampling module is used for transmitting current data in the full-bridge switch circuit based on the signal transmission module.
As a preferred scheme of a system of protecting to the power behind silicon controlled rectifier short circuit, wherein: the comparison module is used for comparing the data monitored by the sampling module with the current critical value of the full-bridge switching circuit stored in the pre-storage module so as to determine whether the thyristor circuit is short-circuited.
As a preferred scheme of a system of protecting to the power behind silicon controlled rectifier short circuit, wherein: the pre-storage module is set as a storage module, and the storage module is used for storing the current critical value of the full-bridge switching circuit and supplying the current critical value to the central processing unit for calling.
As a preferred scheme of a system of protecting to the power behind silicon controlled rectifier short circuit, wherein: the pre-storage module is set as a cache module, and the cache module is used for storing the current critical value of the full-bridge switching circuit and supplying the current critical value to the central processing unit for calling.
Compared with the prior art:
through setting up central processing unit, sampling module, control module, signal transmission module and contrast module, can monitor the electric current in the full-bridge switch circuit, in case when taking place the short circuit of thyristor, can the self-closing full-bridge switch circuit to make the power out of work, realized the protection to the power, prolonged the life of power.
Drawings
Fig. 1 is a schematic diagram provided in embodiment 1 of the present invention;
fig. 2 is a circuit diagram of a modified thyristor according to embodiment 1 of the present invention;
fig. 3 is a block diagram of a control system provided in embodiment 1 of the present invention;
fig. 4 is a block diagram of a control system according to embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
the utility model provides a system for protecting power supply after short circuit of silicon controlled rectifier, please refer to fig. 1-3, which comprises a full bridge switch circuit, wherein a switch K is arranged on the full bridge switch circuit, and the switch K is used for cutting off the input end of the full bridge switch circuit; still include central processing unit, central processing unit electric connection has control module, signal transmission module and prestores the module, control module electric connection has the contrast module, signal transmission module electric connection has the sampling module.
The sampling module is realized by an electronic ammeter, and the model of the electronic ammeter is set to be YR-206NR; the sampling module is used for monitoring the current in the full-bridge switch circuit and transmitting the monitored current data to the central processing unit; the alarm module is realized through an alarm.
The sampling module is based on the transmission of the current data in the full-bridge switch circuit is realized by the signal transmission module, the comparison module is used for comparing the data monitored by the sampling module with the current critical value of the full-bridge switch circuit stored in the pre-storage module to determine whether the thyristor circuit is short-circuited, the pre-storage module is set as a storage module, and the storage module is used for storing the current critical value of the full-bridge switch circuit and supplying the central processing unit to call.
When the full-bridge thyristor is used specifically, the current upper limit critical value (namely the minimum current when the thyristor circuit is short-circuited) of the full-bridge switch circuit is prestored in the storage module, and once the thyristor is burnt out due to poor quality, the thyristor enters a short-circuit state; when the sampling module samples the current value in the short circuit of the silicon controlled rectifier, the signal transmission module transmits the current value to the central processing unit, the central processing unit calls the comparison module through the control module, the comparison module compares the acquired current data with the current value prestored in the storage module, and when the acquired current value is greater than or equal to a preset critical value, the central processing unit sends an opening instruction to the switch K to open the full-bridge switch circuit, so that the whole power supply does not work, and the alarm module sends an instruction to remind a client that the silicon controlled rectifier is damaged, so that the power supply can be protected from being damaged; the cache module is realized based on cache, the data transmission speed is high, and the disconnection of the switch K can be accelerated, so that the power supply is protected more effectively.
Example 2:
referring to fig. 4, the difference from embodiment 1 is: the pre-storage module is set as a cache module, and the cache module is used for storing the current critical value of the full-bridge switching circuit and supplying the current critical value to the central processing unit for calling.
When the short-circuit protection circuit is used specifically, the current upper limit critical value (namely the minimum current when the silicon controlled rectifier circuit is in short circuit) of the full-bridge switching circuit is prestored in the cache module, and once the silicon controlled rectifier is burnt out due to the failure of the quality of the silicon controlled rectifier, the silicon controlled rectifier enters a short-circuit state; when the sampling module samples the current value in the silicon controlled rectifier short circuit, and give central processing unit with this current value transmission through signal transmission module, central processing unit calls the contrast module through control module, the contrast module compares this current data of gathering with the current value that prestores in the buffer memory module, current value more than or equal to when gathering predetermines the critical value, then central processing unit sends the opening instruction to switch K, make full-bridge switch circuit open circuit, let whole power inoperative, send the instruction through alarm module, remind the customer silicon controlled rectifier to have damaged, just so can protect the power not damaged.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. The utility model provides a system for protect power after silicon controlled rectifier short circuit, includes full-bridge switch circuit, its characterized in that: the full-bridge switch circuit is provided with a switch K, and the switch K is used for cutting off the input end of the full-bridge switch circuit; still include central processing unit, central processing unit electric connection has control module, signal transmission module and prestores the module, control module electric connection has the contrast module, signal transmission module electric connection has the sampling module.
2. The system for protecting a power supply after a thyristor short circuit according to claim 1, wherein the sampling module is implemented by an electronic current meter, and the model of the electronic current meter is set to YR-206NR.
3. The system for protecting the power supply after the silicon controlled rectifier is in the short circuit state as claimed in claim 2, further comprising an alarm module, wherein the alarm module is electrically connected with a central processing unit, and the model of the central processing unit is set to be 7 5700G.
4. The system for protecting the power supply after the short circuit of the controlled silicon as claimed in claim 3, wherein the sampling module is used for monitoring the current in the full bridge switching circuit and transmitting the monitored current data to the central processing unit.
5. The system for protecting the power supply after the thyristor short circuit as claimed in claim 4, wherein the sampling module is used for transmitting the current data in the full bridge switching circuit based on the signal transmission module.
6. The system for protecting a power supply after a thyristor short circuit as claimed in claim 5, wherein the comparison module is configured to compare the data monitored by the sampling module with a current critical value of the full bridge switching circuit stored in the pre-storage module to determine whether the thyristor circuit is short-circuited.
7. The system for protecting a power supply after a thyristor short circuit according to claim 6, wherein the pre-storing module is configured as a storage module, and the storage module is configured to store the current critical value of the full-bridge switching circuit and provide the current critical value for the central processing unit to call.
8. The system for protecting the power supply after the short circuit of the controlled silicon according to claim 7, wherein the pre-storage module is set as a cache module, and the cache module is used for storing the current critical value of the full-bridge switching circuit and calling the current critical value by the central processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221732949.7U CN217984517U (en) | 2022-07-05 | 2022-07-05 | System for protecting power supply after short circuit of silicon controlled rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221732949.7U CN217984517U (en) | 2022-07-05 | 2022-07-05 | System for protecting power supply after short circuit of silicon controlled rectifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217984517U true CN217984517U (en) | 2022-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221732949.7U Active CN217984517U (en) | 2022-07-05 | 2022-07-05 | System for protecting power supply after short circuit of silicon controlled rectifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217984517U (en) |
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2022
- 2022-07-05 CN CN202221732949.7U patent/CN217984517U/en active Active
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