CN210469111U - Input anti-surge impact circuit - Google Patents
Input anti-surge impact circuit Download PDFInfo
- Publication number
- CN210469111U CN210469111U CN201921681173.9U CN201921681173U CN210469111U CN 210469111 U CN210469111 U CN 210469111U CN 201921681173 U CN201921681173 U CN 201921681173U CN 210469111 U CN210469111 U CN 210469111U
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- rectifier bridge
- group
- pin
- fuse
- resistor
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Abstract
The utility model discloses a circuit of input surge impact resistance belongs to power input circuit technical field, has solved the security problem, and its technical scheme main points are including positive input end, negative pole input end, rectifier bridge group, fuse group, resistor and thermistor switch, the fuse group is connected to the positive input end, and an output of fuse group passes through thermistor switch and connects the first pin of rectifier bridge group, and the second output of fuse group passes through the first pin of resistor connection rectifier bridge group, it has a dial switch to establish ties on the resistor, the last parallelly connected relay that has of thermistor switch, the third pin of rectifier bridge group is connected to the negative pole input end; the second pin of the rectifier bridge group is the positive output end of the power supply, and the fourth pin of the rectifier bridge group is the negative output end of the power supply, so that the effects of improving safety and working reliability are achieved.
Description
Technical Field
The utility model relates to a power input circuit field especially relates to a circuit of surge impact is prevented in input.
Background
The input circuit of the anti-surge soft start circuit switching power supply mostly adopts a capacitance filtering type rectifying circuit, and at the moment of switching on the incoming line power supply, because the initial voltage on a capacitor is zero, a very large surge current can be formed at the moment of charging the capacitor, particularly, the high-power switching power supply adopts a filtering capacitor with large capacity, so that the surge current reaches over 100A. When the power supply is switched on, the heavy person often causes the input fuse to be blown or the contact of the closing switch to be burned out, and the rectifier bridge is damaged by overcurrent; the light person can make the air switch not close the upper brake. The above phenomena all cause the switching power supply to work abnormally.
Present traditional circuit can set up a great resistance in order to reduce the surge and strike, and resistance power must be big to can strike the conversion with the surge and give off heat, but also have the potential safety hazard, if monitor improper when resistance generates heat, then cause the high temperature easily, and initiate the circuit and catch fire. Therefore, improvements in the circuit are needed to reduce the safety hazard.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. In view of this, the present invention provides a circuit for preventing surge impact, which has the advantages of multiple protection of NTC temperature switch protection, relay double protection, and fuse triple protection.
In order to solve the technical problem, the technical scheme of the utility model is that: a circuit for inputting anti-surge impact comprises a positive input end, a negative input end, a rectifier bridge group, a fuse group, a resistor and a thermistor switch, wherein the positive input end is connected with the fuse group, one output end of the fuse group is connected with a first pin of the rectifier bridge group through the thermistor switch, a second output end of the fuse group is connected with the first pin of the rectifier bridge group through the resistor, a dial switch is connected in series on the resistor, a relay is connected in parallel on the thermistor switch, and the negative input end is connected with a third pin of the rectifier bridge group;
the second pin of the rectifier bridge group is the positive output end of the power supply, and the fourth pin of the rectifier bridge group is the negative output end of the power supply.
As a specific aspect of the present invention, it may be preferable that: the fuse set includes a first fuse and a second fuse connected in parallel to each other.
As a specific aspect of the present invention, it may be preferable that: the rectifier bridge group comprises a first rectifier bridge and a second rectifier bridge which are connected in parallel.
As a specific aspect of the present invention, it may be preferable that: and the output end of the rectifier bridge group is connected with a filter circuit, the filter circuit comprises a filter resistor and a plurality of capacitors, and the filter resistor and the capacitors are connected in parallel.
As a specific aspect of the present invention, it may be preferable that: the rectifier bridge group further comprises a fixing plate, one side face of the fixing plate is used for fixing the first rectifier bridge, the other side face of the fixing plate is used for fixing the second rectifier bridge, and the first rectifier bridge and the second rectifier bridge are staggered in position.
As a specific aspect of the present invention, it may be preferable that: the rectifier bridge group comprises a plurality of rectifier bridges connected in parallel and a corresponding number of fixing plates, each rectifier bridge is connected in parallel, each rectifier bridge is fixed on one side of each fixing plate, and the end parts of the fixing plates are connected together and are circumferentially and uniformly divergently spliced.
The utility model discloses technical effect mainly embodies in following aspect: the circuit can well prevent surge current impact and provide the working reliability and safety of the circuit, wherein the circuit greatly reduces the surge impact through multiple protection, has multiple paths of output, and adopts a rectifier bridge group formed by a plurality of rectifier bridges so as to provide a power supply output interface; this adopts the physical distribution structure, improves the heat-sinking capability, mentions job stabilization nature.
Drawings
FIG. 1 is a circuit configuration diagram in embodiment 1;
FIG. 2 is a circuit diagram of a filter circuit in an embodiment;
FIG. 3 is a view showing the structure of a fixing plate in the embodiment;
fig. 4 is a structural view of a fixing plate in embodiment 2.
Reference numerals: 1. a positive input terminal; 2. a negative input end; 3. a rectifier bridge group; 31. a rectifier bridge; 4. a fuse set; 5. a resistor; 6. a thermistor switch; 7. a relay; 8. a dial switch; 9. a filter circuit; 91. a filter resistor; 92. a capacitor; 10. and (7) fixing the plate.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention so that the technical solution of the present invention can be more easily understood and grasped, and should not be construed as limiting the present invention.
Example 1:
a circuit for inputting anti-surge impact is shown in figure 1 and comprises a positive pole input end 1, a negative pole input end 2, a rectifier bridge group 3, a fuse group 4, a resistor 5 and a thermistor switch 6. The electronic components in the figures are existing products, and the model and the parameters of the components can be unambiguously obtained from the figures by those skilled in the art, so that the details are not repeated, and the design of the scheme is not in the parameters of the components, but in the connection structure and the distribution fixing structure of the components, and belongs to the improvement of a hardware structure.
The fuse set 4 includes a first fuse F1 and a second fuse F2. The rectifier bridge group 3 includes a first rectifier bridge: b1 and second rectifier bridge: B2. reference to "rectifier bridge 31" is made to the single rectifier bridge 31. The above-mentioned designations of the first and second are merely for convenience of description, and the number of the components is not primary or secondary, and the components are the same. Thermistor switch 6: the NTC may also be a temperature sensor switch, or a thermistor, on the market.
The positive input end 1 is connected with the fuse set 4, one output end of the fuse set 4 is connected with a first pin of the rectifier bridge set 3 through the thermistor switch 6, the second output end of the fuse set 4 is connected with the first pin of the rectifier bridge set 3 through the resistor 5, the resistor 5 is connected with a dial switch 8 in series, the thermistor switch 6 is connected with a relay 7 in parallel, and the negative input end 2 is connected with a third pin of the rectifier bridge set 3.
The second pin of the rectifier bridge group 3 is a positive output end of the power supply, and the fourth pin of the rectifier bridge group 3 is a negative output end of the power supply. The fuse set 4 includes a first fuse and a second fuse connected in parallel to each other.
The rectifier bridge group 3 includes a first rectifier bridge B1 and a second rectifier bridge B2 connected in parallel with each other. Therefore, the second pin and the fourth pin of the rectifier bridge 31 are used as output pins, and each rectifier bridge 31 is used as an output interface, so that the number of the output interfaces is expanded.
Referring to fig. 2, a filter circuit is connected to the output terminal of the rectifier bridge group 3, and the filter circuit 9 includes a filter resistor 91 and a plurality of capacitors 92, where the filter resistor 91 and the capacitors 92 are connected in parallel. Thereby the output current can be made more stable.
The working process is as follows: the input end is connected with an external power supply, the current carries out double protection through two fuses at the moment, the dial switch 8 can control whether the resistor 5 is connected or not, and the surge current can be consumed in the connected state according to the self selection of a user. Meanwhile, the thermistor switch 6NTC has the function of sensing the temperature of the resistor 5 or the temperature around the resistor, and can automatically cut off the circuit under the condition that the temperature exceeds the standard. In addition, the relay 7 is used for conducting and breaking control when the relay is connected with an external controller, so that the resistor 5 and the thermistor switch 6 can be protected. The relay 7 may be initially in an open state, and when the resistor 5 consumes the inrush current, the relay 7 may be closed by external control, so as to short-circuit the resistor 5 and the thermistor switch 6, thereby performing a protection function. The rectifier bridge 31 provides a reliable and stable dc voltage as an output.
Referring to fig. 3, the rectifier bridge group 3 further includes a fixing plate, a first rectifier bridge B1 is fixed on one side surface of the fixing plate 10, a second rectifier bridge B2 is fixed on the other side surface of the fixing plate 10, and the first rectifier bridge B1 and the second rectifier bridge B2 are staggered.
It can be seen from the design structure of fig. 3 that, because the rectifier bridge 31 generates heat greatly during the operation, the structural design makes the space utilization of the device reasonable from the device layout, the heat dissipation is increased highly efficiently, and the safety is improved.
Example 2:
referring to fig. 4, based on the design and structure of embodiment 1, the differences are: the rectifier bridge 31 group 3 comprises a plurality of rectifier bridges 31 which are connected in parallel and a corresponding number of fixing plates 10, each rectifier bridge 31 is connected in parallel, each rectifier bridge 31 is fixed on one side of each fixing plate 10, and the end parts of each fixing plate 10 are connected together and are circumferentially and uniformly divergently spliced. Therefore, the number of the sorting bridges is increased, the output capacity of the rectifier bridge 31 is increased, the heat dissipation efficiency is considered, and the touch between devices is reduced.
Above structure, the circuit work security and the reliability that improve greatly.
Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.
Claims (6)
1. An input surge impact prevention circuit comprises a positive input end, a negative input end, a rectifier bridge group, a fuse group, a resistor and a thermistor switch, and is characterized in that the positive input end is connected with the fuse group, one output end of the fuse group is connected with a first pin of the rectifier bridge group through the thermistor switch, a second output end of the fuse group is connected with the first pin of the rectifier bridge group through the resistor, a dial switch is connected in series on the resistor, a relay is connected in parallel on the thermistor switch, and the negative input end is connected with a third pin of the rectifier bridge group;
the second pin of the rectifier bridge group is the positive output end of the power supply, and the fourth pin of the rectifier bridge group is the negative output end of the power supply.
2. The input surge protection circuit according to claim 1, wherein said fuse set comprises a first fuse and a second fuse connected in parallel with each other.
3. The input surge protection circuit of claim 1, wherein said set of rectifier bridges comprises a first rectifier bridge and a second rectifier bridge connected in parallel with each other.
4. The input surge protection circuit according to claim 1, wherein a filter circuit is connected to an output terminal of said rectifier bridge group, said filter circuit comprises a filter resistor and a plurality of capacitors, and said filter resistor and said capacitors are connected in parallel.
5. The input surge protection circuit of claim 3, wherein said set of rectifier bridges further comprises a fixing plate, said first rectifier bridge is fixed to one side of said fixing plate, said second rectifier bridge is fixed to the other side of said fixing plate, and said first rectifier bridge and said second rectifier bridge are offset.
6. The input surge protection circuit according to claim 1, wherein said set of rectifier bridges comprises a plurality of rectifier bridges connected in parallel with each other, a corresponding number of fixed plates, each of the rectifier bridges connected in parallel with each other, each of the rectifier bridges fixed on one side of the fixed plates, and the ends of each of the fixed plates are connected together and circumferentially uniformly divergently spliced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921681173.9U CN210469111U (en) | 2019-10-09 | 2019-10-09 | Input anti-surge impact circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921681173.9U CN210469111U (en) | 2019-10-09 | 2019-10-09 | Input anti-surge impact circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210469111U true CN210469111U (en) | 2020-05-05 |
Family
ID=70435716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921681173.9U Expired - Fee Related CN210469111U (en) | 2019-10-09 | 2019-10-09 | Input anti-surge impact circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210469111U (en) |
-
2019
- 2019-10-09 CN CN201921681173.9U patent/CN210469111U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200505 Termination date: 20201009 |