CN201523229U - Surge protective circuit and device containing common mode choke - Google Patents
Surge protective circuit and device containing common mode choke Download PDFInfo
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- CN201523229U CN201523229U CN2009202207256U CN200920220725U CN201523229U CN 201523229 U CN201523229 U CN 201523229U CN 2009202207256 U CN2009202207256 U CN 2009202207256U CN 200920220725 U CN200920220725 U CN 200920220725U CN 201523229 U CN201523229 U CN 201523229U
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Abstract
The utility model discloses a surge protective circuit and a device containing a common mode choke. The utility model at least comprises a fusing device, a common mode choke, and three over-voltage protection devices, wherein the fusing device is mounted on a live wire between an alternating current power supply and the common mode choke, the common mode choke at least comprises two coils, the two coils are respectively connected in series on the live wire and a zero line of the alternating current power supply, two over-voltage protection devices are respectively connected in parallel with two coils in the common mode choke, and another over-voltage protection device is connected between the live wire and the zero line. By applying the technical scheme of the utility model, the over-voltage protection can be provided to an alternating current power supply circuit, and at the same time, the cost of protecting a line is reduced.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of surge protection circuit and device that comprises common mode inductance.
Background technology
(Surge Protection Device is indispensable a kind of device in the electronic equipment lightning protection SPD) to surge protector, and the past often is called " lightning arrester " or " overvoltage protection device ".The effect of surge protector is that the instantaneous overvoltage of scurrying into power line, signal transmssion line is limited in the voltage range that equipment or system can bear, or powerful lightning current is let out the inflow place, protects protected equipment or system not to be hit and damages.
The type of surge protector is different by different purposes with structure, but should comprise a non-linear voltage limiting element at least.
The basic components and parts that are used for surge protector have: discharging gap, gas-discharge tube, piezo-resistance, inhibition diode and choking-winding etc.
SPD is divided into following several types by operation principle:
Switching mode, votage limit type, bypass type or chokes type;
SPD is divided into following several types by purposes:
Power supply protector comprises AC power protector, DC power supply protector, Switching Power Supply protector etc.
The signal protection device comprises low frequency signal protector, high-frequency signal protector, antenna feeder protector etc.
The power supply source of communication products is generally AC power supplies (220V).Because domestic user's site environment is simpler and cruder or relatively badly, the power surge protection is a weakest link, the equipment majority damages because of power surge.Require all external SPD of each user and unrealistic, and it costs an arm and a leg.Therefore, the power port of device interior needs very high surge barrier propterty, yet according to current traditional design, promotes the surge barrier propterty and just mean the lifting cost, a kind of high-performance, protects the surge design cheaply and just seems particularly important and want and urgent.
The surge protection of common AC power supplies mouth generally adopt fuse+piezo-resistance (perhaps gas discharge tube) to protect, but there is following shortcoming in this technical scheme:
(1) cost height
Promote barrier propterty if desired, must improve the through-current capacity of fuse and piezo-resistance (perhaps gas discharge tube), cost also just and then raises in the common mode protection.
(2) lack the combination that stops and release
The prior art scheme mainly is that surge energy is all released, and lacks surge energy and stops theory, stops with releasing not combine application.
The utility model content
The utility model provides a kind of surge protection circuit and device that comprises common mode inductance, can reduce the cost of route protection providing overvoltage protection simultaneously.
The utility model provides a kind of surge protection circuit that comprises common mode inductance, comprises a device for fusing at least, and a common mode inductance and three over-voltage protectors, described device for fusing are installed on the live wire between AC power and the described common mode inductance,
At least comprise two coils in the described common mode inductance; described two coils are series at respectively on the live wire and zero line of AC power; two over-voltage protectors respectively with described common mode inductance in two coils carry out in parallelly, another over-voltage protector is connected between live wire and the zero line.
Preferably, described device for fusing is specially fuse, or by meeting the circuit connecting mechanism that the fusible material of high temperature constitutes.
Preferably, described another over-voltage protector is connected between live wire and the zero line, is specially:
Described another over-voltage protector is positioned at the outlet side of described common mode inductance.
Preferably, described over-voltage protector is specially piezo-resistance or gas discharge tube.
Preferably, the described surge protection circuit that comprises common mode inductance also comprises filter capacitor:
Described filter capacitor is connected between the live wire and zero line between described common mode inductance and the described AC power; And/or,
Described filter capacitor is connected between the live wire and zero line of described common mode inductance outlet side.
On the other hand; the utility model also provides a kind of surge protective device that comprises common mode inductance; be connected between AC power and the power circuit; at least comprise a device for fusing; a common mode inductance and three over-voltage protectors; described device for fusing is installed on the live wire between AC power and the described common mode inductance
At least comprise two coils in the described common mode inductance; described two coils are series at respectively on the live wire and zero line of AC power; two over-voltage protectors respectively with described common mode inductance in two coils carry out in parallelly, another over-voltage protector is connected between live wire and the zero line.
Preferably, described device for fusing is specially fuse, or by meeting the circuit connecting mechanism that the fusible material of high temperature constitutes.
Preferably, described another over-voltage protector is connected between live wire and the zero line, is specially:
Described another over-voltage protector is between described common mode inductance and described power circuit.
Preferably, described over-voltage protector is specially piezo-resistance or gas discharge tube.
Preferably, the described surge protective device that comprises common mode inductance also comprises filter capacitor:
Described filter capacitor is connected between the live wire and zero line between described common mode inductance and the described AC power; And/or,
Described filter capacitor is connected between the live wire and zero line of described common mode inductance outlet side.
Compared with prior art, the utility model has the following advantages at least:
The utility model stops the surge current in the circuit by common mode inductance, and by overvoltage protector the surge current energy released, thereby, can reduce the cost of route protection provide overvoltage protection simultaneously for circuit.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of circuit diagram that comprises the surge protection circuit of common mode inductance that the utility model proposes;
Fig. 2 is the circuit diagram of a kind of surge protection circuit that comprises common mode inductance in concrete application scenarios that the utility model proposes.
Embodiment
As stated in the Background Art, existing power surge protection mainly realizes by fuse and piezo-resistance (or gas discharge tube), such simple combination needs parts to have very big current flowing amount, could realize releasing to the surge current of big peak value, therefore, improve anti-surge effect, can only drop into by raising the cost and realize.
In order to address the above problem, a kind of surge protection circuit that comprises common mode inductance is provided in the utility model, comprise a device for fusing at least, a common mode inductance and three over-voltage protectors.
Wherein, device for fusing is installed on the live wire between AC power and the common mode inductance; in concrete application scenarios; the entity of device for fusing can be specially fuse; or by meeting the circuit connecting mechanism that the fusible material of high temperature constitutes; when the current peak in circuit is higher than certain threshold value, cut off circuit by the fusing mode, thus protective circuit.
In the surge protection circuit that the utility model proposed, comprised two coils in the common mode inductance at least, these two coils are series at respectively on the live wire and zero line of AC power.
In common circuit environment, the common mode inductance that primary power source all can be used, common mode inductance has a very important parasitic parameter leakage inductance, common mode inductance is used on the L/N line, leakage inductance is the equal of the inductance of string on the L/N line like this, and according to the characteristic of inductance, the electric current that promptly flows through inductance can not suddenly change, to moment surge current very high impedance is arranged, flow through thereby suppress the spike surge current.
Based on above-mentioned technical thought, common mode inductance has been realized the blocking effect to surge current.
On this basis, with two over-voltage protectors respectively with common mode inductance in two coils carry out in parallelly, be used for after the response coil of described common mode inductance stops surge current, the surge current energy that is blocked being released.
But; just the coils from parallel connection of coils of over-voltage protector and common mode inductance can not necessarily be released the surge current energy that is blocked fully; so; further disposed another over-voltage protector in the utility model at the outlet side of common mode inductance; be directly connected between live wire and the zero line; being used for carrying out over-voltage protector in parallel with two coils of common mode inductance respectively at two releases to the surge current energy that is blocked; and after the predetermined threshold value of releasing, remaining surge current energy is released.
In concrete application scenarios, described over-voltage protector is specially piezo-resistance or gas discharge tube.
The technical solution of the utility model is exactly a characteristic of having used the common mode inductance leakage inductance, surge energy moment is stopped and suppresses, and slowly releases through piezo-resistance again, has reduced the moment peak current protective device is destroyed.
The schematic diagram of specific implementation of the present utility model as shown in Figure 1.
Wherein, two coils in the common mode inductance are series at respectively on the live wire and zero line of AC power; between common mode inductance is series at coil and AC power on the live wire; (for example also be in series with a fuse; fuse); three over-voltage protectors are specially piezo-resistance 1; piezo-resistance 2 and piezo-resistance 3; piezo-resistance 1 and piezo-resistance 2 respectively with common mode inductance in two coils being connected on live wire and the zero line carry out in parallel; 3 of piezo-resistances are connected between the live wire and zero line of outlet side of common mode inductance; further; through after the piezo-resistance 3, the output source of AC power connects other power circuits.
Compared with prior art, the utility model has the following advantages at least:
The utility model stops the surge current in the circuit by common mode inductance, and by overvoltage protector the surge current energy released, thereby, can reduce the cost of route protection provide overvoltage protection simultaneously for circuit.
In order to further specify the technical solution of the utility model, now the utility model is described in conjunction with concrete application scenarios.
As shown in Figure 2, be the circuit diagram of a kind of surge protection circuit that comprises common mode inductance in concrete application scenarios that the utility model proposes.
Wherein, common mode inductance is connected between the live wire and zero line of AC power, and surge current is played barrier effect.
On the live wire between common mode inductance and the AC power, be connected with fuse as fuse, guaranteeing when surge current is too high directly with blown fuse, thereby protective circuit is not damaged.
In order further to improve in the circuit protection effect for surge current; in live wire and neutral side; NTC parts (thermistor) have been disposed respectively; because the resistance value of NTC parts can change with variation of temperature; therefore; can be in circuital current generation acute variation; by resistance current energy is stopped; thereby; further auxiliary common mode inductance plays the barrier effect to surge current; in concrete application scenarios, the concrete deployed position and the quantity of NTC parts can be adjusted according to actual needs, and the variation of the concrete deployment way of NTC parts does not influence protection scope of the present invention.
Above-mentioned parts mainly are for surge current is stopped, still, and after surge current is blocked, can there be a large amount of current energies, therefore, need releases these energy, based on the consideration that energy is released, the utility model is the following arrangements of components of concrete increase in circuit:
On the coil that common mode inductance and live wire and zero line are in series, difference piezo-resistance 1 in parallel and piezo-resistance 2, the current energy that common mode inductance stopped is released, and, for leakage current energy more completely, further disposed piezo-resistance 3 in the utility model at the outlet side of common mode inductance, be directly connected between live wire and the zero line, be used for releasing at the surge current energy that piezo-resistance 1 and 2 pairs of piezo-resistances are blocked, and after the predetermined threshold value of releasing, remaining surge current energy is released.
In order to reach better circuit application effect; in circuit; X electric capacity and Y electric capacity have also been disposed; wherein; Y electric capacity is connected between live wire and the zero line; and be connected with the PG signal end of AC power; (power supply is in running order) carries out filtering to AC power when the PG of AC power signal is in initiate mode; after surge current protection, further carry out secondary filtering, thereby ensure the quality and the laser propagation effect of circuital current by X electric capacity through common mode inductance; and; in order to protect X electric capacity, also between the live wire of X electric capacity outlet side and zero line, connected bleeder resistance, the excess energy of being put aside in the X electric capacity is released.
Through above a series of surge current stop and release handle after, the electric current of AC power outputs to concrete power circuit.
Compared with prior art, the utility model has the following advantages at least:
The utility model stops the surge current in the circuit by common mode inductance, and by overvoltage protector the surge current energy released, thereby, can reduce the cost of route protection provide overvoltage protection simultaneously for circuit.
On the other hand; the utility model also provides a kind of surge protective device that comprises common mode inductance; provide surge protective device in a kind of circuit according to above-mentioned technical thought; can carry out freely being connected with circuit; and can realize corresponding dismounting; be connected in easily between power input and the power circuit, power circuit is carried out surge protection.
Because the technical thought of agent technology thinking and previous embodiment is similar, at this repeated description no longer, difference between the two is:
Previous embodiment proposed a kind of surge protection circuit that comprises common mode inductance directly as a part of circuit connect with power supply circuits among; the latter then is as an external unit of circuit independently with device for fusing, common mode inductance and each over-voltage protector; can carry out surge protection to circuit by the power supply of ways of connecting incoming transport circuit with between the electric line.
The technical scheme that the utility model proposed has effectively changed the surge protection pattern of fuse+piezo-resistance in the existing technical scheme; the surge current energy is tentatively released by stopping of common mode inductance with two piezo-resistances; effectively reduce the surge current impact that last piezo-resistance is born; prolong the useful life of piezo-resistance, reduced corresponding cost input.
The protectiving scheme that the utility model proposed can be by the voltage surge (internal resistance 42ohm) of 1.2/50uS waveform 7.4KV.
This scheme is under the situation that improves common mode surge protective capability, and the result is very stable, after the big through-flow piezo-resistance of selection, can pass through 7.4KV common mode surge, and in theory can also be higher, and the piezo-resistance price is lower, is beneficial to the saving cost.
For the technical solution of the utility model is described, the applicant has further provided the concrete example of parameters of circuit block in the technical scheme.
In circuit structure as shown in Figure 1, the concrete specification of piezo-resistance 1 and piezo-resistance 2 is as shown in table 1:
Table 1 piezo-resistance 1/2 specification table
| Sequence number | The descriptive element title | The descriptive element value |
| 1 | Pressure sensitive voltage | 350V |
| 2 | The maximum ac circuit voltage that allows | 275V |
| 3 | Discharge capacity | 400A |
| 4 | Maximum clamped voltage | 710V |
| 5 | Packing forms | Plug-in mounting |
Piezo-resistance 3 concrete specifications are as shown in table 2:
Table 2 piezo-resistance 3 specification tables
| Sequence number | The descriptive element title | The descriptive element value |
| 1 | Pressure sensitive voltage | 385V |
| 2 | The maximum ac circuit voltage that allows | 300V |
| 3 | Discharge capacity | 1200A |
| 4 | Maximum clamped voltage | 775V |
| Sequence number | The descriptive element title | The descriptive element value |
| 5 | Packing forms | Plug-in mounting |
The concrete specification of common mode inductance is as shown in table 3:
Table 3 common mode inductance specification table
| Sequence number | The descriptive element title | The descriptive element value |
| 1 | Self-inductance | 10mH |
| 2 | Leakage inductance | 84uH |
| 3 | Dc impedance | 0.18Ω |
Above parameter information is arranged as can be seen, the specification of the needed components and parts of the technical solution of the utility model is not very high, therefore, can obviously not increase the lower deployment cost of physical circuit, makes concrete that the circuit setting has better cost performance.
More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection range of the present utility model.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, unit in the accompanying drawing or flow process might not be that enforcement the utility model is necessary.
Above-mentioned the utility model embodiment sequence number is not represented the quality of embodiment just to description.
Claims (10)
1. a surge protection circuit that comprises common mode inductance comprises a device for fusing at least, and a common mode inductance and three over-voltage protectors, described device for fusing are installed on the live wire between AC power and the described common mode inductance, it is characterized in that,
At least comprise two coils in the described common mode inductance; described two coils are series at respectively on the live wire and zero line of AC power; two over-voltage protectors respectively with described common mode inductance in two coils carry out in parallelly, another over-voltage protector is connected between live wire and the zero line.
2. the surge protection circuit that comprises common mode inductance as claimed in claim 1 is characterized in that described device for fusing is specially fuse, thermistor or the circuit connecting mechanism that is made of the fusible material of chance high temperature.
3. the surge protection circuit that comprises common mode inductance as claimed in claim 1 is characterized in that, described another over-voltage protector is connected between live wire and the zero line, is specially:
Described another over-voltage protector is positioned at the outlet side of described common mode inductance.
4. as claim 1 or the 3 described surge protection circuits that comprise common mode inductance, it is characterized in that described over-voltage protector is specially piezo-resistance or gas discharge tube.
5. the surge protection circuit that comprises common mode inductance as claimed in claim 1 is characterized in that, also comprises filter capacitor:
Described filter capacitor is connected between the live wire and zero line between described common mode inductance and the described AC power; And/or,
Described filter capacitor is connected between the live wire and zero line of described common mode inductance outlet side.
6. a surge protective device that comprises common mode inductance is connected between AC power and the power circuit, it is characterized in that; at least comprise a device for fusing; a common mode inductance and three over-voltage protectors, described device for fusing are installed on the live wire between AC power and the described common mode inductance
At least comprise two coils in the described common mode inductance; described two coils are series at respectively on the live wire and zero line of AC power; two over-voltage protectors respectively with described common mode inductance in two coils carry out in parallelly, another over-voltage protector is connected between live wire and the zero line.
7. the surge protective device that comprises common mode inductance as claimed in claim 6 is characterized in that described device for fusing is specially fuse, thermistor or the circuit connecting mechanism that is made of the fusible material of chance high temperature.
8. the surge protective device that comprises common mode inductance as claimed in claim 6 is characterized in that, described another over-voltage protector is connected between live wire and the zero line, is specially:
Described another over-voltage protector is between described common mode inductance and described power circuit.
9. as claim 6 or the 8 described surge protective devices that comprise common mode inductance, it is characterized in that described over-voltage protector is specially piezo-resistance or gas discharge tube.
10. the surge protective device that comprises common mode inductance as claimed in claim 6 is characterized in that, also comprises filter capacitor:
Described filter capacitor is connected between the live wire and zero line between described common mode inductance and the described AC power; And/or,
Described filter capacitor is connected between the live wire and zero line of described common mode inductance outlet side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202207256U CN201523229U (en) | 2009-11-02 | 2009-11-02 | Surge protective circuit and device containing common mode choke |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202207256U CN201523229U (en) | 2009-11-02 | 2009-11-02 | Surge protective circuit and device containing common mode choke |
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| Publication Number | Publication Date |
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| CN201523229U true CN201523229U (en) | 2010-07-07 |
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| CN2009202207256U Expired - Lifetime CN201523229U (en) | 2009-11-02 | 2009-11-02 | Surge protective circuit and device containing common mode choke |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447250A (en) * | 2010-09-30 | 2012-05-09 | 深圳茂硕电源科技股份有限公司 | Simple and practical lightning protection circuit |
| CN103078308A (en) * | 2012-12-28 | 2013-05-01 | 惠州市经典照明电器有限公司 | Surge absorbing circuit of LED (Light Emitting Diode) power supply |
| CN105262071A (en) * | 2015-08-13 | 2016-01-20 | 南京亚派科技股份有限公司 | Surge and pulse group suppress circuit |
| CN106130166A (en) * | 2016-07-05 | 2016-11-16 | 江苏江凌测控科技股份有限公司 | Redundant power module circuit |
| CN106300241A (en) * | 2016-08-28 | 2017-01-04 | 安徽普天电力科技有限公司 | A kind of combination type low voltage Surge Protector |
| CN106487219A (en) * | 2016-12-16 | 2017-03-08 | 李鹏 | A kind of power circuit of central air-conditioning zoning controller |
| CN108631282A (en) * | 2018-07-10 | 2018-10-09 | 横店集团得邦照明股份有限公司 | A kind of lightning protection circuit and its implementation for LED illumination lamp |
| CN109068465A (en) * | 2018-06-20 | 2018-12-21 | 国网江苏省电力有限公司泰州供电分公司 | A kind of HID lamp input circuit |
| CN109347078A (en) * | 2018-10-23 | 2019-02-15 | 南京博德新能源技术有限公司 | A kind of anti-lightning surge circuit |
| CN109599853A (en) * | 2018-11-23 | 2019-04-09 | 上海电力学院 | A kind of SPD back-up protection device and matching process based on GDT and NTC |
| CN110611430A (en) * | 2019-09-23 | 2019-12-24 | 上海新进芯微电子有限公司 | Switching power supply control circuit and method and switching power supply system |
| CN114552557A (en) * | 2022-02-28 | 2022-05-27 | 江西增鑫科技股份有限公司 | Power supply surge protector |
-
2009
- 2009-11-02 CN CN2009202207256U patent/CN201523229U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447250A (en) * | 2010-09-30 | 2012-05-09 | 深圳茂硕电源科技股份有限公司 | Simple and practical lightning protection circuit |
| CN103078308A (en) * | 2012-12-28 | 2013-05-01 | 惠州市经典照明电器有限公司 | Surge absorbing circuit of LED (Light Emitting Diode) power supply |
| CN105262071A (en) * | 2015-08-13 | 2016-01-20 | 南京亚派科技股份有限公司 | Surge and pulse group suppress circuit |
| CN106130166A (en) * | 2016-07-05 | 2016-11-16 | 江苏江凌测控科技股份有限公司 | Redundant power module circuit |
| CN106300241A (en) * | 2016-08-28 | 2017-01-04 | 安徽普天电力科技有限公司 | A kind of combination type low voltage Surge Protector |
| CN106487219A (en) * | 2016-12-16 | 2017-03-08 | 李鹏 | A kind of power circuit of central air-conditioning zoning controller |
| CN109068465A (en) * | 2018-06-20 | 2018-12-21 | 国网江苏省电力有限公司泰州供电分公司 | A kind of HID lamp input circuit |
| CN108631282A (en) * | 2018-07-10 | 2018-10-09 | 横店集团得邦照明股份有限公司 | A kind of lightning protection circuit and its implementation for LED illumination lamp |
| CN109347078A (en) * | 2018-10-23 | 2019-02-15 | 南京博德新能源技术有限公司 | A kind of anti-lightning surge circuit |
| CN109599853A (en) * | 2018-11-23 | 2019-04-09 | 上海电力学院 | A kind of SPD back-up protection device and matching process based on GDT and NTC |
| CN110611430A (en) * | 2019-09-23 | 2019-12-24 | 上海新进芯微电子有限公司 | Switching power supply control circuit and method and switching power supply system |
| CN114552557A (en) * | 2022-02-28 | 2022-05-27 | 江西增鑫科技股份有限公司 | Power supply surge protector |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |
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Granted publication date: 20100707 |