CN219697290U - Self-destruction overvoltage protection circuit - Google Patents
Self-destruction overvoltage protection circuit Download PDFInfo
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- CN219697290U CN219697290U CN202223074647.8U CN202223074647U CN219697290U CN 219697290 U CN219697290 U CN 219697290U CN 202223074647 U CN202223074647 U CN 202223074647U CN 219697290 U CN219697290 U CN 219697290U
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- power supply
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- limiting resistor
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- 230000000670 limiting effect Effects 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052710 silicon Inorganic materials 0.000 abstract description 6
- 239000010703 silicon Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model provides a self-destruction overvoltage protection circuit, and relates to the technical field of low-voltage direct-current power supply systems. The utility model comprises a first diode D1, a second diode D2 and a current-limiting resistor R1, wherein the first diode D1 and the current-limiting resistor R1 are connected in series, the cathode of the first diode D1 is connected with the anode of an output power supply, the current-limiting resistor R1 is connected with the cathode of the output power supply, the second diode D2 is connected with the first diode D1 and the current-limiting resistor R1 in parallel, the anode of the second diode D2 is connected with the anode of the output power supply, and the cathode of the second diode D2 is connected with the cathode of the output power supply. The utility model utilizes the output positive and negative of the silicon controlled short circuit power supply to realize the protection of the power supply current limiting action, and the silicon controlled is connected between the output positive and negative of the power supply, so that the silicon controlled does not work when the power supply does not have overvoltage fault, and the loss of a circuit is avoided.
Description
Technical Field
The utility model relates to the technical field of low-voltage direct-current power supply systems, in particular to a self-destruction overvoltage protection circuit.
Background
When the DC power supply is abnormal, the output voltage of the power supply is possibly increased, the subsequent equipment is damaged, and the subsequent circuit cannot work normally.
Disclosure of Invention
Aiming at the defects existing in the problems, the utility model provides a self-destruction overvoltage protection circuit which utilizes the output positive and negative of a thyristor short-circuit power supply to realize the protection of the power supply current limiting action.
In order to solve the above problems, the present utility model provides a self-destruction type overvoltage protection circuit, wherein the self-destruction type overvoltage protection circuit comprises a first diode D1, a second diode D2 and a current limiting resistor R1, the first diode D1 and the current limiting resistor R1 are connected in series, the negative electrode of the first diode D1 is connected with the positive electrode of an output power supply, the current limiting resistor R1 is connected with the negative electrode of the output power supply, the second diode D2 is connected with the first diode D1 and the current limiting resistor R1 in parallel, the positive electrode of the second diode D2 is connected with the positive electrode of the output power supply, and the negative electrode of the second diode D2 is connected with the negative electrode of the output power supply.
Preferably, the current limiting resistor further comprises a capacitor C1, and the capacitor C1 is connected in parallel to two ends of the current limiting resistor R1.
Compared with the prior art, the utility model has the following advantages:
the utility model utilizes the output positive and negative of the silicon controlled short circuit power supply to realize the protection of the power supply current limiting action, and the silicon controlled is connected between the output positive and negative of the power supply, so that the silicon controlled does not work when the power supply does not have overvoltage fault, and the loss of a circuit is avoided.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present utility model.
Detailed Description
The present utility model will be further described in detail with reference to the drawings and examples, which are not intended to limit the utility model, in order to make the objects, technical solutions and advantages of the present utility model more apparent.
As shown in fig. 1, the embodiment of the utility model includes a first diode D1, a second diode D2 and a current limiting resistor R1, the first diode D1 and the current limiting resistor R1 are connected in series, the cathode of the first diode D1 is connected with the anode of the output power supply, the current limiting resistor R1 is connected with the cathode of the output power supply, the second diode D2 is connected in parallel with the first diode D1 and the current limiting resistor R1, the anode of the second diode D2 is connected with the anode of the output power supply, and the cathode of the second diode D2 is connected with the cathode of the output power supply.
In this embodiment, the current limiting resistor R further includes a capacitor C1, where the capacitor C1 is connected in parallel to two ends of the current limiting resistor R1.
In this embodiment, the first diode D1 adjusts the overvoltage protection value, the current limiting resistor R1 and the capacitor C1 prevent the malfunction of the second diode D2, the second diode D2 protects the main power tube, when the output voltage exceeds the protection value, the first diode D1 is turned on, and the capacitor C1 charges the second diode D2 to be turned on, thereby realizing the output overvoltage protection.
All electric components in the scheme are connected with an adaptive power supply through wires by a person skilled in the art, and an appropriate controller is selected according to actual conditions so as to meet control requirements, specific connection and control sequences, and the electric connection is completed by referring to the following working principles in the working sequence among the electric components, wherein the detailed connection means are known in the art, and the following main description of the working principles and processes is omitted from the description of electric control.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
In the description of the present specification, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present patent and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present patent application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present patent application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In this specification, unless clearly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in this specification will be understood by those of ordinary skill in the art in view of the specific circumstances.
In this specification, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (2)
1. The self-destruction overvoltage protection circuit is characterized by comprising a first diode D1, a second diode D2 and a current-limiting resistor R1, wherein the first diode D1 and the current-limiting resistor R1 are connected in series, the negative electrode of the first diode D1 is connected with the positive electrode of an output power supply, the current-limiting resistor R1 is connected with the negative electrode of the output power supply, the second diode D2 is connected with the first diode D1 and the current-limiting resistor R1 in parallel, the positive electrode of the second diode D2 is connected with the positive electrode of the output power supply, and the negative electrode of the second diode D2 is connected with the negative electrode of the output power supply.
2. A self-destroying overvoltage protection circuit according to claim 1, further comprising a capacitor C1, wherein the capacitor C1 is connected in parallel across the current limiting resistor R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223074647.8U CN219697290U (en) | 2022-11-21 | 2022-11-21 | Self-destruction overvoltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223074647.8U CN219697290U (en) | 2022-11-21 | 2022-11-21 | Self-destruction overvoltage protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219697290U true CN219697290U (en) | 2023-09-15 |
Family
ID=87940731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223074647.8U Active CN219697290U (en) | 2022-11-21 | 2022-11-21 | Self-destruction overvoltage protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219697290U (en) |
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2022
- 2022-11-21 CN CN202223074647.8U patent/CN219697290U/en active Active
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