CN203967752U - Be connected to the protective device between power supply and power supply unit thereof - Google Patents
Be connected to the protective device between power supply and power supply unit thereof Download PDFInfo
- Publication number
- CN203967752U CN203967752U CN201420392436.5U CN201420392436U CN203967752U CN 203967752 U CN203967752 U CN 203967752U CN 201420392436 U CN201420392436 U CN 201420392436U CN 203967752 U CN203967752 U CN 203967752U
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- Prior art keywords
- power supply
- protective device
- negative terminal
- terminal mouth
- positive port
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000001681 protective effect Effects 0.000 title claims abstract description 46
- 229920000642 polymer Polymers 0.000 claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000011889 copper foil Substances 0.000 claims abstract description 4
- 238000011084 recovery Methods 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002441 reversible effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a kind of protective device being connected between power supply and power supply unit thereof, and described protective device comprises the first positive port, the first negative terminal mouth, the second positive port and the second negative terminal mouth; Wherein, the described first positive port is connected with the positive output end of power supply, the first negative terminal mouth is connected with the negative output terminal of described power supply, the second positive port with by the power supply of described Power supply equipment, input positive port and be connected, the second negative terminal mouth is connected with the power supply input negative terminal mouth of described equipment; Between the described second positive port and the second negative terminal mouth, be connected with a Zener diode; Between the described first positive port and the first negative terminal mouth, be connected with a surge protective device; Between the described first positive port and the second positive port, be serially connected with a polymer temperature-sensitive device; Between described the first negative terminal mouth and the second negative terminal mouth, by the Copper Foil in printed board, connect.Implement the protective device being connected between power supply and power supply unit thereof of the present utility model, there is following beneficial effect: its protection, antisurge ability that enough provides electric power polarity to connect inverse time is better.
Description
Technical field
The utility model relates to power supply, more particularly, relates to a kind of protective device being connected between power supply and power supply unit thereof.
Background technology
In communication equipment, particularly when communication system integrated, be usually directed between more equipment and equipment, interconnected between equipment and power supply.In these systems, for certain consideration.These equipment may not be to use same power supply, and equipment may not be same producer with the producer that is the power supply of its power supply.Now; due to respectively by different manufacturer production; lack unified planning or design; safeguard measure during interconnecting between its distinct device may just relatively lack; for example,, when power supply and equipment connection, if there is the situation of error-polarity connection; owing to lacking safeguard measure, may cause the damage of power supply or equipment.In addition, current electromagnetic environment is increasingly severe, on electrical network, may there is at random certain surge voltage, although the ac input end at power supply can carry out certain filtering, treatment measures to similar interference, but for the surge voltage compared with large, may appear at by power supply the power input of equipment.And this surge voltage is for equipment, may cause error code or loss of data, also may bring irreversible damage to equipment.Therefore,, for stable, the reliably working of equipment, a kind of protective device being connected between its power supply and equipment is very important.
Utility model content
The technical problems to be solved in the utility model is; above-mentioned electric power polarity for prior art connects inverse time shortage protection, the poor defect of antisurge ability, provides a kind of protection that can provide electric power polarity to connect inverse time, antisurge ability to be connected to preferably the protective device between power supply and power supply unit thereof.
The utility model solves the technical scheme that its technical problem adopts: construct a kind of protective device being connected between power supply and power supply unit thereof, described protective device comprises the first positive port, the first negative terminal mouth, the second positive port and the second negative terminal mouth; Wherein, the described first positive port is connected with the positive output end of power supply, the first negative terminal mouth is connected with the negative output terminal of described power supply, the second positive port with by the power supply of described Power supply equipment, input positive port and be connected, the second negative terminal mouth is connected with the power supply input negative terminal mouth of described equipment; Between the described second positive port and the second negative terminal mouth, be connected with a Zener diode; Between the described first positive port and the first negative terminal mouth, be connected with a surge protective device; Between the described first positive port and the second positive port, be serially connected with a polymer temperature-sensitive device; Between described the first negative terminal mouth and the second negative terminal mouth, by the Copper Foil in printed board, connect.
Further, also comprise be attempted by described surge protective device, for limit input described polymer temperature-sensitive device voltage fast recovery diode.
Further, described surge protective device is one and has the ceramic gas discharge tube that two links, its puncture voltage are 300V.
Further, the anode of described fast recovery diode is connected with one end of described polymer temperature-sensitive device, and the puncture voltage of described fast recovery diode is 18V.
Further, the puncture voltage of described Zener diode is 13V, and the nominal supply power voltage of described equipment is 12V.
Further, the shell of described polymer temperature-sensitive device and described Zener diode links together by the heat-conduction medium of insulation, is convenient to the heat that described Zener diode sends and can be delivered to rapidly described polymer temperature-sensitive device.
Further, described heat-conduction medium also links together the shell of the shell of described fast recovery diode and described polymer temperature-sensitive device.
Further, described protective device is arranged on the power input mouth of described output port of power source or described equipment or is the separate modular that is independent of described power supply and equipment.
Implement the protective device being connected between power supply and power supply unit thereof of the present utility model, there is following beneficial effect: due on the power input of equipment and be connected to Zener diode, and be serially connected with temperature-sensitive device on the loop of power supply input, when electric power polarity connects inverse time, electric current on Zener diode strengthens, cause the electric current on temperature-sensitive device to strengthen, make this temperature-sensitive device temperature increase, thereby make its resistance become large, reach the object of controlling output current, make the power supply of reversal connection be unlikely to equipment to bring infringement; Simultaneously, the Anti-surging device that is attempted by power output end is further eliminated the surge voltage that drains to power output end, the combination of above-mentioned Zener diode and temperature-sensitive device has also further hindered the path that surge voltage is transferred to equipment, add releasing of Anti-surging device, make its protection to surge voltage better.Therefore, its protection, antisurge ability that enough provides electric power polarity to connect inverse time is better.
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model is connected to this device in the protective device embodiment between power supply and power supply unit thereof;
Fig. 2 is the circuit diagram of this device in described embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described further.
As shown in Figure 1 and Figure 2, at the utility model, be connected in the protective device embodiment between power supply and power supply unit thereof, this protective device comprises the first positive port, the first negative terminal mouth, the second positive port and the second negative terminal mouth; Wherein, the described first positive port is connected with the positive output end of power supply, the first negative terminal mouth is connected with the negative output terminal of described power supply, the second positive port with by the power supply of this Power supply equipment, input positive port and be connected, the second negative terminal mouth is connected with the power supply input negative terminal mouth of described equipment; Between the second positive port and the second negative terminal mouth, be connected with a Zener diode, this Zener diode is attempted by the above-mentioned second positive port and the second negative terminal mouth, and its negative electrode is connected with the above-mentioned second positive port, and its anodic bonding is on above-mentioned the second negative terminal mouth; Between the first positive port and the first negative terminal mouth, be connected with a surge protective device; Between the first positive port and the second positive port, be serially connected with a polymer temperature-sensitive device; Between described the first negative terminal mouth and the second negative terminal mouth, by the Copper Foil in printed board, connect.Like this, the voltage of above-mentioned power supply output is connected in equipment by the first positive and negative port, the second positive and negative port of above-mentioned protective device, for equipment.When there is surge voltage or overshoot in power supply; if this surge voltage or overshoot also do not arrive the puncture voltage of above-mentioned surge protective device; surge protective device is failure to actuate, and by polymer temperature-sensitive device and Zener diode thereafter, this surge voltage or overshoot is processed.When this surge voltage or overshoot are greater than above-mentioned puncture voltage; surge protective device is breakdown; by the limiting voltage between the above-mentioned first positive port and the first negative terminal mouth, on its protection voltage, meanwhile, polymer temperature-sensitive device and Zener diode are thereafter processed this voltage.On basic, when surge voltage or overshoot exist, flow through above-mentioned polymer temperature-sensitive device (in the present embodiment, this device is actually a thermistor, it is large that its resistance value becomes when temperature raises, refer to the R1 in Fig. 2) electric current strengthen, simultaneously, due to the characteristic of Zener diode be by the voltage clamping at its two ends on the voltage of setting (being exactly the puncture voltage of this Zener diode conventionally), so flow through, the electric current of this Zener diode also can strengthen, this raises the temperature of polymer temperature-sensitive device, like this, it is large that the resistance of this polymer temperature-sensitive device can become, suppress by the electric current on it, and then the protection of realization to equipment.Similarly, when there is reverse power connection (be the negative input end that the positive output end of power supply is connected to equipment, the negative output terminal of power supply is connected to the positive input terminal of equipment), due to Zener diode forward conduction, its electric current is strengthened, temperature rises; Equally, the electric current of the above-mentioned polymer temperature-sensitive device of flowing through also strengthens, and makes the resistance of this polymer temperature-sensitive device increase, and equally equipment is played the effect of protection.Therefore, in the present embodiment, above-mentioned Zener diode and polymer temperature-sensitive device organically combine, and have realized the protection to surge voltage or electric current, the protection to equipment while simultaneously having realized reverse power connection.
In addition; in the present embodiment; owing to still there being larger gap between the puncture voltage of above-mentioned surge protective device and the puncture voltage of Zener diode; in order to realize better the protection to equipment and this protective device itself; also taked the measure of further step-down; therefore, this protective device also comprise be attempted by surge protective device, for limiting the fast recovery diode (referring to the D1 of Fig. 2) of input polymer temperature-sensitive device voltage.Surge protective device is one and has the ceramic gas discharge tube (referring to the T1 in Fig. 2) that two links, its puncture voltage are 300V, and the negative electrode of fast recovery diode is connected with one end of described polymer temperature-sensitive device, the puncture voltage of described fast recovery diode (D1) is 18V, this shows when surge voltage occurs, this fast recovery diode by its terminal voltage clamper to 18V; Because the puncture voltage of Zener diode is 13V, the nominal supply power voltage of equipment is 12V, makes voltage on above-mentioned Zener diode and device power supply (DPS) input can not surpass its rated value not more.Like this; the puncture voltage combination of the puncture voltage of higher surge protective device and lower fast recovery diode D1; even higher surge voltage is occurred; it is to be reduced within the scope of lower safe voltage entering above-mentioned polymer temperature-sensitive device; polymer temperature-sensitive device, Zener diode and equipment below can both better be protected, be more difficult for damaged.
In the present embodiment, because polymer temperature-sensitive device changes its resistance value by temperature, and no matter be that surge voltage or overshoot occur, or reverse power connection, what it caused is not only the rising of this polymer temperature-sensitive device self-temperature.Because Zener diode in these cases can breakdown or forward conduction, its electric current flowing through also can strengthen, so its temperature can rise in these situations more equally.In order to make, the action of this protective device is more sensitive or the reaction time is faster, makes full use of the heat that each device produces and is necessary.For this reason, in the present embodiment, the shell of described polymer temperature-sensitive device and described Zener diode links together by the heat-conduction medium of insulation, is convenient to the heat that described Zener diode sends and can be delivered to rapidly described polymer temperature-sensitive device.In order further to utilize the heat of device, in the present embodiment, heat-conduction medium can also link together the shell of the shell of described fast recovery diode and described polymer temperature-sensitive device.In the present embodiment, above-mentioned heat-conduction medium can be used common heat conductive silica gel.In some cases, can also above-mentioned device and heat conductive silica gel thereof be made to an integral body by a metal shell (this shell can not with the termination contact of above-mentioned device), reach the effect that better heat is transmitted.
In addition, in the present embodiment, above-mentioned protective device can be an independent module, in the system integration, is to be serially connected between power supply and equipment; In some cases, this protective device also can be used as a part for power supply or equipment, is arranged on the power input mouth of described output port of power source or described equipment.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (8)
1. be connected to the protective device between power supply and power supply unit thereof, it is characterized in that, described protective device comprises the first positive port, the first negative terminal mouth, the second positive port and the second negative terminal mouth; Wherein, the described first positive port is connected with the positive output end of power supply, the first negative terminal mouth is connected with the negative output terminal of described power supply, the second positive port with by the power supply of described Power supply equipment, input positive port and be connected, the second negative terminal mouth is connected with the power supply input negative terminal mouth of described equipment; Between the described second positive port and the second negative terminal mouth, be connected with a Zener diode; Between the described first positive port and the first negative terminal mouth, be connected with a surge protective device; Between the described first positive port and the second positive port, be serially connected with a polymer temperature-sensitive device; Between described the first negative terminal mouth and the second negative terminal mouth, by the Copper Foil in printed board, connect.
2. the protective device being connected between power supply and power supply unit thereof according to claim 1, is characterized in that, also comprise be attempted by described surge protective device, for limit input described polymer temperature-sensitive device voltage fast recovery diode.
3. the protective device being connected between power supply and power supply unit thereof according to claim 2, is characterized in that, described surge protective device is one and has the ceramic gas discharge tube that two links, its puncture voltage are 300V.
4. the protective device being connected between power supply and power supply unit thereof according to claim 3, is characterized in that, the anode of described fast recovery diode is connected with one end of described polymer temperature-sensitive device, and the puncture voltage of described fast recovery diode is 18V.
5. the protective device being connected between power supply and power supply unit thereof according to claim 4, is characterized in that, the puncture voltage of described Zener diode is 13V, and the nominal supply power voltage of described equipment is 12V.
6. the protective device being connected between power supply and power supply unit thereof according to claim 5; it is characterized in that; the shell of described polymer temperature-sensitive device and described Zener diode links together by the heat-conduction medium of insulation, is convenient to the heat that described Zener diode sends and can be delivered to rapidly described polymer temperature-sensitive device.
7. the protective device being connected between power supply and power supply unit thereof according to claim 6, is characterized in that, described heat-conduction medium also links together the shell of the shell of described fast recovery diode and described polymer temperature-sensitive device.
8. the protective device being connected between power supply and power supply unit thereof according to claim 7; it is characterized in that, described protective device is arranged on the power input mouth of described output port of power source or described equipment or is the separate modular that is independent of described power supply and equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420392436.5U CN203967752U (en) | 2014-07-16 | 2014-07-16 | Be connected to the protective device between power supply and power supply unit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420392436.5U CN203967752U (en) | 2014-07-16 | 2014-07-16 | Be connected to the protective device between power supply and power supply unit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203967752U true CN203967752U (en) | 2014-11-26 |
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ID=51928296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420392436.5U Expired - Lifetime CN203967752U (en) | 2014-07-16 | 2014-07-16 | Be connected to the protective device between power supply and power supply unit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203967752U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281990A (en) * | 2017-01-05 | 2018-07-13 | 北京小米移动软件有限公司 | Electronic equipment |
-
2014
- 2014-07-16 CN CN201420392436.5U patent/CN203967752U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281990A (en) * | 2017-01-05 | 2018-07-13 | 北京小米移动软件有限公司 | Electronic equipment |
| CN108281990B (en) * | 2017-01-05 | 2021-08-03 | 北京小米移动软件有限公司 | Electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141126 |