CN215528696U - Power supply protection circuit based on direct current power supply - Google Patents
Power supply protection circuit based on direct current power supply Download PDFInfo
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- CN215528696U CN215528696U CN202122198131.3U CN202122198131U CN215528696U CN 215528696 U CN215528696 U CN 215528696U CN 202122198131 U CN202122198131 U CN 202122198131U CN 215528696 U CN215528696 U CN 215528696U
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Abstract
The utility model discloses a power supply protection circuit based on a direct-current power supply, which comprises a direct-current power supply, wherein the positive electrode of the direct-current power supply is connected with a first power supply end of a static switch through an inverter, and a power transmission end of the static switch is connected with a load; the static switch further comprises a control end and an alternating current bypass power supply end, the power supply protection circuit further comprises a controller connected to the control end, and the alternating current bypass power supply end of the static switch is connected with a standby power supply through a safety device; the rated power of the safety device and the static switch is at least three times of the rated power of the inverter, and when the load power is higher than the rated power of the inverter, the controller controls the first power supply end of the static switch to be disconnected and controls the alternating current bypass power supply end to be connected. The utility model realizes the normal power supply of the load when the inverter is shut down, ensures that the power consumption of a terminal user is not influenced, and improves the use experience of the user.
Description
Technical Field
The utility model relates to the technical field of electronics, in particular to a power supply protection circuit based on a direct-current power supply.
Background
When an existing direct-current power supply supplies power to an alternating-current power supply load, direct current needs to be converted into alternating current, the direct-current power supply load needs to be used in cooperation with an inverter, however, when the load is overloaded due to power supply abnormality of the direct-current power supply, the inverter starts automatic protection and is shut down, power supply of the load is interrupted, and use experience of a terminal user is affected.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems that when the power supply of the existing direct-current power supply is abnormal, the load is overloaded to cause the shutdown of an inverter and the power supply of the load is interrupted, the embodiment of the utility model provides a power supply protection circuit based on a direct-current power supply, which comprises the direct-current power supply, wherein the anode of the direct-current power supply is connected with a first power supply end of a static switch through the inverter, and a power transmission end of the static switch is connected with the load;
the static switch further comprises a control end and an alternating current bypass power supply end, the power supply protection circuit further comprises a controller connected to the control end, and the alternating current bypass power supply end of the static switch is connected with a standby power supply through a safety device;
the rated power of the safety device and the static switch is at least three times of the rated power of the inverter, and when the load power is higher than the rated power of the inverter, the controller controls the first power supply end of the static switch to be disconnected and controls the alternating current bypass power supply end to be connected.
Further, when the load power is reduced to the rated power of the inverter, the controller controls the alternating current bypass power supply end of the static switch to be disconnected and controls the first power supply end to be connected.
Further, the power supply protection circuit further includes an AC-DC converter, the DC power supply is a rechargeable power supply, the backup power supply is further connected to an input end of the AC-DC converter, and an output end of the AC-DC converter is connected to a negative electrode of the DC power supply, so that when the DC power supply is idle, the backup power supply charges the DC power supply through the AC-DC converter.
Further, the output end of the AC-DC converter is also connected to the power supply input end of the controller.
Further, the controller is further configured to collect power of the load, and the controller is further connected to a display at least for displaying the power of the load.
Further, the controller is at least configured to collect power supply information of the dc power supply, where the power supply information includes a power supply voltage, a power supply current, and a power supply power of the dc power supply.
Further, the display is at least used for displaying the power supply information of the direct current power supply and sending out an alarm signal when the controller judges that the power supply is abnormal.
Further, the direct current power supply is a storage battery, and the standby power supply is mains supply.
According to the embodiment of the utility model, the output end of the inverter is connected with the first power supply end of the static switch, the power transmission end of the static switch is connected with the load, the static switch further comprises a control end and an alternating current bypass power supply end, the power supply protection circuit further comprises a controller connected to the control end, and the alternating current bypass power supply end of the static switch is connected with the standby power supply through a safety device; when the direct-current power supply supplies power normally, the static switch starts the first power supply end to supply power normally to the load through the direct-current power supply; when the power supply of the direct-current power supply is abnormal, the load power is larger than the rated power of the inverter, the controller controls the first power supply end of the static switch to be disconnected and controls the alternating-current bypass power supply end to be connected, the load can be supplied with power through the alternating-current bypass by the standby power supply, normal power supply to the load when the inverter is shut down is achieved, the power consumption of a terminal user is not affected, the use experience of the user is improved, meanwhile, the rated power of the safety device and the rated power of the static switch are at least three times of the rated power of the inverter, the reliability of a power supply protection circuit can be improved, and the impact resistance is remarkably improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a dc power supply-based power protection circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
When embodiments of the present invention refer to the ordinal numbers "first", "second" (if present), etc., it is to be understood that the words are merely used for distinguishing between them unless they literally indicate the order in which they are used.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" (if present) are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, an embodiment of the present invention discloses a power supply protection circuit based on a dc power supply, including a dc power supply, wherein a positive electrode of the dc power supply is connected to a first power supply terminal 1 of a static switch through an inverter, and a power transmission terminal 2 of the static switch is connected to a load;
the static switch further comprises a control end 3 and an alternating current bypass power supply end 4, the power supply protection circuit further comprises a controller connected to the control end 3, and the alternating current bypass power supply end 4 of the static switch is connected with a standby power supply through a safety device fu;
the rated power of the fuse device fu and the static switch is at least three times of the rated power of the inverter, and when the load power is higher than the rated power of the inverter, the controller controls the first power supply end 1 of the static switch to be switched off and controls the alternating current bypass power supply end 4 to be switched on.
When the load power is reduced to the rated power of the inverter, the controller controls the alternating current bypass power supply end 4 of the static switch to be disconnected and controls the first power supply end 1 to be connected. This embodiment is through providing the controller, but the controller real time monitoring load power, has ensured when load power resumes to normal condition, through control static switch, makes DC power supply normally be the load power supply, has dual supply automatic switch-over function.
The power supply protection circuit further comprises an AC-DC converter, the DC power supply is a rechargeable battery, the backup power supply is further connected to an input end of the AC-DC converter, and an output end of the AC-DC converter is connected to a negative electrode of the DC power supply, so that when the DC power supply is idle, the backup power supply charges the DC power supply through the AC-DC converter. In the embodiment, the AC-DC converter is provided, and the output end of the AC-DC converter is connected with the negative electrode of the direct current power supply, so that when the direct current power supply is idle, the standby power supply supplies power to the direct current power supply, and the power supply quality and the durability of the direct current power supply are guaranteed.
The output end of the AC-DC converter is also connected with the power supply input end of the controller. The standby power supply is mains supply, so that the controller can be powered by the mains supply in real time.
Preferably, but not limited to, the controller is further configured to collect power of the load, and the controller is further connected to a display at least for displaying the power of the load.
As an improvement to the foregoing solution, the controller is further at least configured to collect power supply information of the dc power supply, where the power supply information includes a power supply voltage, a power supply current, and a power supply power of the dc power supply. The display is also at least used for displaying the power supply information of the direct current power supply and sending out an alarm signal when the controller judges that the power supply is abnormal. The controller of this embodiment is used for gathering load power and DC power supply's power supply information to show and report to the police through the display, make managers can monitor the operating condition of DC power supply and load in real time, so that maintain DC power supply in advance, carry out the early warning to load condition, promoted the power supply protection circuit's of this embodiment security.
According to the embodiment of the utility model, the output end of the inverter is connected with the first power supply end of the static switch, the power transmission end of the static switch is connected with the load, the static switch further comprises a control end and an alternating current bypass power supply end, the power supply protection circuit further comprises a controller connected to the control end, and the alternating current bypass power supply end of the static switch is connected with the standby power supply through a safety device; when the direct-current power supply supplies power normally, the static switch starts the first power supply end to supply power normally to the load through the direct-current power supply; when the power supply of the direct-current power supply is abnormal, the load power is greater than the rated power of the inverter, the controller controls the first power supply end of the static switch to be disconnected and controls the alternating-current bypass power supply end to be connected, the load can be supplied with power through the alternating-current bypass by the standby power supply, normal power supply of the load when the inverter is shut down is achieved, the power consumption of a terminal user is not affected, the use experience of the user is improved, meanwhile, the rated power of the safety device and the rated power of the static switch are at least three times that of the rated power of the inverter, the reliability of a power supply protection circuit can be improved, and the impact resistance is remarkably improved
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A power supply protection circuit based on a direct current power supply comprises the direct current power supply, and is characterized in that the positive pole of the direct current power supply is connected with a first power supply end of a static switch through an inverter, and a power transmission end of the static switch is connected with a load;
the static switch further comprises a control end and an alternating current bypass power supply end, the power supply protection circuit further comprises a controller connected to the control end, and the alternating current bypass power supply end of the static switch is connected with a standby power supply through a safety device;
the rated power of the safety device and the static switch is at least three times of the rated power of the inverter, and when the load power is higher than the rated power of the inverter, the controller controls the first power supply end of the static switch to be disconnected and controls the alternating current bypass power supply end to be connected.
2. The dc power supply-based protection circuit of claim 1, wherein the controller controls the ac bypass supply terminal of the static switch to be turned off and controls the first supply terminal to be turned on when the load power decreases to the rated power of the inverter.
3. The DC power supply-based power protection circuit of claim 2, wherein the power protection circuit further comprises an AC-DC converter, the DC power supply is a rechargeable power supply, the backup power supply is further connected to an input terminal of the AC-DC converter, and an output terminal of the AC-DC converter is connected to a negative terminal of the DC power supply, so that when the DC power supply is idle, the backup power supply charges the DC power supply through the AC-DC converter.
4. The DC power supply-based protection circuit of claim 3, wherein the output of the AC-DC converter is further connected to a supply input of the controller.
5. The DC power supply-based power protection circuit of claim 4, wherein the controller is further configured to collect power of the load, and the controller is further coupled to a display at least for displaying the power of the load.
6. The power supply protection circuit based on a dc power supply of claim 5, wherein the controller is further connected to the dc power supply for collecting power supply information of the dc power supply, and the power supply information includes a power supply voltage, a power supply current, and a power supply power of the dc power supply.
7. The dc power supply-based power supply protection circuit of claim 6, wherein the display is further configured to at least display power supply information of the dc power supply and send an alarm signal when the controller determines that power supply is abnormal.
8. The power supply protection circuit based on a direct current power supply as claimed in any one of claims 1 to 7, wherein the inverter is a DC-AC inverter, the direct current power supply is a storage battery, and the backup power supply is commercial power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122198131.3U CN215528696U (en) | 2021-09-11 | 2021-09-11 | Power supply protection circuit based on direct current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122198131.3U CN215528696U (en) | 2021-09-11 | 2021-09-11 | Power supply protection circuit based on direct current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215528696U true CN215528696U (en) | 2022-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122198131.3U Active CN215528696U (en) | 2021-09-11 | 2021-09-11 | Power supply protection circuit based on direct current power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215528696U (en) |
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2021
- 2021-09-11 CN CN202122198131.3U patent/CN215528696U/en active Active
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