CN204992562U - Surge suppression circuit - Google Patents
Surge suppression circuit Download PDFInfo
- Publication number
- CN204992562U CN204992562U CN201520610962.9U CN201520610962U CN204992562U CN 204992562 U CN204992562 U CN 204992562U CN 201520610962 U CN201520610962 U CN 201520610962U CN 204992562 U CN204992562 U CN 204992562U
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- Prior art keywords
- circuit
- insurance
- resistance
- electric capacity
- connect
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Abstract
The utility model provides a pair of surge suppression circuit, include: insurance circuit, bridge type rectifier circuit and filter circuit, the insurance circuit is connected with bridge type rectifier circuit, and bridge type rectifier circuit still is connected with filter circuit. The utility model provides a surge suppression circuit, circuit structure is simple, and maintainability is high, can effectively restrain surge voltage, reduces the use of components and parts simultaneously, great the cost is reduced, market competition improves.
Description
Technical field
The utility model relates to a kind of circuit, particularly relates to a kind of surge restraint circuit.
Background technology
In the electronic equipment using DC power supply, owing to generally there is energy-storage travelling wave tube in electronic equipment, such as electric capacity, inductance etc., therefore at powered on moment, DC power supply will be charged to these energy-storage travelling wave tubes.Meanwhile, because the general capacity of these energy-storage travelling wave tubes is large, equivalent resistance is little, therefore very large charging current will be produced at powered on moment, i.e. surge current; Serious also by the appearance along with spark phenomenon, this large transient current will have a strong impact on the reliability of electronic equipment.At present, the method usually adopted is that additional strings connects into delayed startup module on the power circuit of electronic equipment internal circuit, in order to slowly to connect DC power supply and electronic equipment, thus avoids the impact of electrical surge electric current.
But extra access delay starts module in circuit, need to increase extra electronic devices and components, thus add Computer-Assisted Design, Manufacture And Test cost; In addition, also increase PCB surface amassed, this is disadvantageous factor for the electronic equipment of miniaturization.
Utility model content
The purpose of this utility model is to provide a kind of surge restraint circuit, solves one or more in above-mentioned prior art problem.
A kind of surge restraint circuit that the utility model provides, comprising: insurance circuit, bridge rectifier and filter circuit, insurance circuit is connected with bridge rectifier, and bridge rectifier is also connected with filter circuit.
The utility model provides a kind of surge restraint circuit, and circuit structure is simple, maintainable high, and effectively can suppress surge voltage, reduce the use of components and parts simultaneously, greatly reduce cost, the market competitiveness improves.
In some embodiments, the input access civil power of insurance circuit, insurance circuit comprises temperature fuse resistance and insurance resistance, and the input of temperature fuse resistance connects live wire, and insurance resistance connects zero line.
In some embodiments, the input access civil power of insurance circuit, insurance circuit comprises temperature fuse resistance and insurance resistance, and temperature fuse resistance, insurance resistant series, the input of temperature fuse resistance connects live wire.
In some embodiments, the input access civil power of insurance circuit, insurance circuit comprises temperature fuse resistance, insurance resistance and piezo-resistance VR, the input of temperature fuse resistance connects live wire, insurance resistance connects zero line, and the output of temperature fuse resistance, insurance resistance connects piezo-resistance VR.
In some embodiments, filter circuit comprises the first electric capacity, the second electric capacity and common mode inductance, the positive pole of the first electric capacity connects a positive terminal of common mode inductance, the negative pole of the first electric capacity connects a negative pole end of common mode inductance, another positive terminal of common mode inductance connects the positive pole of the second electric capacity, and another negative pole end of common mode inductance connects the negative pole of the second electric capacity.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of a kind of surge restraint circuit of the present utility model;
Fig. 2 is the circuit diagram of the embodiment 1 of a kind of surge restraint circuit of the present utility model;
Fig. 3 is the circuit diagram of the embodiment 2 of a kind of surge restraint circuit of the present utility model;
Fig. 4 is the circuit diagram of the embodiment 3 of a kind of surge restraint circuit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, execution mode of the present utility model is elaborated.
As shown in Figure 1, according to a kind of execution mode of the present utility model, a kind of surge restraint circuit, comprising: insurance circuit 1, bridge rectifier 2 and filter circuit 3, insurance circuit 1 is connected with bridge rectifier 2, and bridge rectifier 2 is also connected with filter circuit 3.
Embodiment 1
As shown in Figure 2, the input access civil power of insurance circuit 1, insurance circuit 1 comprises temperature fuse resistance FR
1with insurance resistance FR
2, temperature fuse resistance FR
1input connect live wire, insurance resistance FR
2connect zero line.
Temperature fuse resistance FR
1with insurance resistance FR
2output connect the input of bridge rectifier 2 respectively.
Filter circuit 3 comprises the first electric capacity C
1, the second electric capacity C
2and common mode inductance L
1.First electric capacity C
1positive pole connect an output of bridge rectifier 2, the first electric capacity C
1negative pole connect another output of bridge rectifier 2.First electric capacity C
1positive pole connect common mode inductance L
1a positive terminal, the first electric capacity C
1negative pole connect common mode inductance L
1a negative pole end, common mode inductance L
1another positive terminal connect the second electric capacity C
2positive pole, common mode inductance L
1another negative pole end connect the second electric capacity C
2negative pole.Second electric capacity C
2negative pole also ground connection.First electric capacity C
1and the second electric capacity C
2positive pole be connected to live wire, the first electric capacity C
1and the second electric capacity C
2negative pole be connected to zero line.
Embodiment 2
As shown in Figure 3, the input access civil power of insurance circuit 1, insurance circuit 1 comprises temperature fuse resistance FR
1with insurance resistance FR
2, temperature fuse resistance FR
1, insurance resistance FR
2series connection, temperature fuse resistance FR
1input connect live wire.
Insurance resistance FR
2output connect an input of bridge rectifier 2 respectively, zero line directly accesses another input connecting bridge rectifier 2.
Filter circuit 3 comprises the first electric capacity C
1, the second electric capacity C
2and common mode inductance L
1.First electric capacity C
1positive pole connect an output of bridge rectifier 2, the first electric capacity C
1negative pole connect another output of bridge rectifier 2.First electric capacity C
1positive pole connect common mode inductance L
1a positive terminal, the first electric capacity C
1negative pole connect common mode inductance L
1a negative pole end, common mode inductance L
1another positive terminal connect the second electric capacity C
2positive pole, common mode inductance L
1another negative pole end connect the second electric capacity C
2negative pole.Second electric capacity C
2negative pole also ground connection.First electric capacity C
1and the second electric capacity C
2positive pole be connected to live wire, the first electric capacity C
1and the second electric capacity C
2negative pole be connected to zero line.
Embodiment 3
As shown in Figure 4, the input access civil power of insurance circuit 1, insurance circuit 1 comprises temperature fuse resistance FR
1, insurance resistance FR
2and piezo-resistance VR
1, temperature fuse resistance FR
1input connect live wire, insurance resistance FR
2connect zero line, temperature fuse resistance FR
1, insurance resistance FR
2output connect piezo-resistance VR
1.
Temperature fuse resistance FR
1with insurance resistance FR
2output connect the input of bridge rectifier 2 respectively.
Filter circuit 3 comprises the first electric capacity C
1, the second electric capacity C
2and common mode inductance L
1.First electric capacity C
1positive pole connect an output of bridge rectifier 2, the first electric capacity C
1negative pole connect another output of bridge rectifier 2.First electric capacity C
1positive pole connect common mode inductance L
1a positive terminal, the first electric capacity C
1negative pole connect common mode inductance L
1a negative pole end, common mode inductance L
1another positive terminal connect the second electric capacity C
2positive pole, common mode inductance L
1another negative pole end connect the second electric capacity C
2negative pole.Second electric capacity C
2negative pole also ground connection.First electric capacity C
1and the second electric capacity C
2positive pole be connected to live wire, the first electric capacity C
1and the second electric capacity C
2negative pole be connected to zero line.
The utility model provides a kind of surge restraint circuit, and circuit structure is simple, maintainable high, and effectively can suppress surge voltage, reduce the use of components and parts simultaneously, greatly reduce cost, the market competitiveness improves.
Claims (5)
1. a surge restraint circuit, it is characterized in that, comprise: insurance circuit (1), bridge rectifier (2) and filter circuit (3), described insurance circuit (1) is connected with described bridge rectifier (2), and described bridge rectifier (2) is also connected with described filter circuit (3).
2. a kind of surge restraint circuit according to claim 1, is characterized in that, the input access civil power of described insurance circuit (1), described insurance circuit (1) comprises temperature fuse resistance (FR
1) and insurance resistance (FR
2), described temperature fuse resistance (FR
1) input connect live wire, described insurance resistance (FR
2) connect zero line.
3. a kind of surge restraint circuit according to claim 1, is characterized in that, the input access civil power of described insurance circuit (1), described insurance circuit (1) comprises temperature fuse resistance (FR
1) and insurance resistance (FR
2), described temperature fuse resistance (FR
1), insurance resistance (FR
2) series connection, described temperature fuse resistance (FR
1) input connect live wire.
4. a kind of surge restraint circuit according to claim 1, is characterized in that, the input access civil power of described insurance circuit (1), described insurance circuit (1) comprises temperature fuse resistance (FR
1), insurance resistance (FR
2) and piezo-resistance (VR
1), described temperature fuse resistance (FR
1) input connect live wire, described insurance resistance (FR
2) connect zero line, described temperature fuse resistance (FR
1), insurance resistance (FR
2) output connect described piezo-resistance (VR
1).
5. a kind of surge restraint circuit according to claim 1, is characterized in that, described filter circuit (3) comprises the first electric capacity (C
1), the second electric capacity (C
2) and common mode inductance (L
1), described first electric capacity (C
1) positive pole connect described common mode inductance (L
1) a positive terminal, described first electric capacity (C
1) negative pole connect described common mode inductance (L
1) a negative pole end, described common mode inductance (L
1) another positive terminal connect described second electric capacity (C
2) positive pole, described common mode inductance (L
1) another negative pole end connect described second electric capacity (C
2) negative pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520610962.9U CN204992562U (en) | 2015-08-13 | 2015-08-13 | Surge suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520610962.9U CN204992562U (en) | 2015-08-13 | 2015-08-13 | Surge suppression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204992562U true CN204992562U (en) | 2016-01-20 |
Family
ID=55126890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520610962.9U Active CN204992562U (en) | 2015-08-13 | 2015-08-13 | Surge suppression circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204992562U (en) |
-
2015
- 2015-08-13 CN CN201520610962.9U patent/CN204992562U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |