CN202917967U - Lightning protection device of direct-current power supply - Google Patents

Lightning protection device of direct-current power supply Download PDF

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Publication number
CN202917967U
CN202917967U CN 201220366989 CN201220366989U CN202917967U CN 202917967 U CN202917967 U CN 202917967U CN 201220366989 CN201220366989 CN 201220366989 CN 201220366989 U CN201220366989 U CN 201220366989U CN 202917967 U CN202917967 U CN 202917967U
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CN
China
Prior art keywords
lightning protection
protection circuit
direct
power supply
level
Prior art date
Application number
CN 201220366989
Other languages
Chinese (zh)
Inventor
范战略
申超群
谢斌
刘建伟
李栋
郑泽国
Original Assignee
京信通信技术(广州)有限公司
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Application filed by 京信通信技术(广州)有限公司 filed Critical 京信通信技术(广州)有限公司
Priority to CN 201220366989 priority Critical patent/CN202917967U/en
Application granted granted Critical
Publication of CN202917967U publication Critical patent/CN202917967U/en

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Abstract

The utility model discloses a lightning protection device of a direct-current power supply. The lightning protection device comprises a first-level lightning protection circuit, a second-level lightning protection circuit and two decoupling elements; the first-level lightning protection circuit includes a temperature insurance pressure-sensitive resistor and an over-voltage protection device, wherein the temperature insurance pressure-sensitive resistor is connected between a direct-current feeder line and a direct-current return line of the direct-current power supply and is grounded through the over-voltage protection device; the second-level lightning protection circuit is a bidirectional transient voltage suppression diode connected between the direct-current feeder line and the direct-current return line; the first-level lightning protection circuit is connected with the second-level lightning protection circuit through the decoupling elements; and one decoupling element is connected in series onto the direct-current feeder line between the first-level lightning protection circuit and the second-level lightning protection circuit, and the other decoupling element is connected in series onto the direct-current return line between the first-level lightning protection circuit and the second-level lightning protection circuit. The lightning protection device of the direct-current power supply has the advantages of good lightning protection effect, low residual voltage, small volume, low cost and high practicality.

Description

The lightning protection device of DC power supply
Technical field
The utility model relates to the power lightning protection technical field, particularly relates to a kind of lightning protection device of DC power supply.
Background technology
The lightning protection properties of communication apparatus is to affect the very important factor of product reliability, and the annual damage that large number quipments is arranged is owing to thunderbolt causes, wherein the damage of DC power supply accounts for greatly.Along with development communication technologies, communication equipment more and more trends towards miniaturization; Because reducing of its volume and weight is also more and more higher to the requirement of lightning protection device.
DC power supply lightning protection device commonly used all is to access direct current arrester as the one-level lightning protection in the input port of DC power supply, and its volume is large, cost is higher, and residual voltage is high, and lightning protection effect is lower.
The utility model content
Based on this, the utility model provides a kind of lightning protection device of DC power supply, and this lightning protection device volume is little, cost is low, and exports residual voltage and greatly reduce, and the lightning protection effect is better.
A kind of lightning protection device of DC power supply comprises one-level lightning protection circuit, secondary lightning protection circuit and two decoupling components;
Described one-level lightning protection circuit comprises Temperature protection type piezo-resistance and overvoltage protection device, and described Temperature protection type piezo-resistance is connected between the direct-current tie and direct current return wire of DC power supply, and by described overvoltage protection device ground connection;
Described secondary lightning protection circuit is two-way transient voltage twin zener dioder, and described two-way transient voltage twin zener dioder is connected between described direct-current tie and the described direct current return wire.
Described one-level lightning protection circuit is connected with described secondary lightning protection circuit by described decoupling component; One of them described decoupling component is connected on the dc feeder between described one-level lightning protection circuit and the described secondary lightning protection circuit, and another described decoupling component is connected on the direct current return wire between described one-level lightning protection circuit and the described secondary lightning protection circuit.
The lightning protection device of the utility model DC power supply, the one-level lightning protection circuit in the device adopt Temperature protection type piezo-resistance as lightning protection component, have advantages of that security performance is high, discharge capacity is large, volume is little; Before the secondary lightning protection circuit, decoupling component is set, guarantee that the one-level lightning protection circuit discharges most of overcurrent, and the secondary lightning protection circuit adopts two-way transient voltage twin zener dioder, and two-way transient voltage twin zener dioder volume is little, reaction is fast, can further reduce the residual voltage of lightning protection device; The utility model lightning protection effect is better, and residual voltage is little, volume is little, cost is low; Practicality is high, can be applicable to the occasion of various DC power supply input port lightning protection, and preferably application prospect is particularly arranged in the direct-current input-type communication equipment.
Description of drawings
Fig. 1 is the lightning protection device structural representation in one embodiment of the utility model DC power supply.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
As shown in Figure 1, be the lightning protection device structural representation in one embodiment of the utility model DC power supply; Be connected to direct-current tie and direct current return wire at the input port of DC power supply circuit;
Lightning protection device of the present utility model comprises one-level lightning protection circuit 10, secondary lightning protection circuit 30 and two decoupling components 20;
Described one-level lightning protection circuit 10 comprises Temperature protection type piezo-resistance 101 and overvoltage protection device 102, and described Temperature protection type piezo-resistance 101 is connected between direct-current tie and the direct current return wire, and by described overvoltage protection device 102 ground connection;
One-level lightning protection circuit 10 is connected on the circuit foremost, be used for bypass by the most of overcurrent between direct-current tie and the direct current return wire, the electric current that flows to secondary lightning protection circuit 30 is dropped to below certain amplitude, with Overvoltage Amplitude clamper to a reduced levels, be conducive to secondary lightning protection circuit 30 and further reduce residual voltage simultaneously; One-level lightning protection circuit 10 of the present utility model adopts Temperature protection type piezo-resistance 101(TMOV), with respect to piezo-resistance MOV, TMOV has overtemperature and breaks away from break function, with thermally sensitive device at common MOV, when leakage current continues to increase the operating temperature that causes the MOV body temperature to be elevated to the TMOV setting, temperature sensor will disconnect, and its security performance is better;
One-level lightning protection circuit 10 also comprises overvoltage protection device 102, and described overvoltage protection device is connected between described direct current return wire and the earth; Described overvoltage protection device 102 is used for most of overcurrent that the TMOV bypass is introduced is discharged into the earth; The device of overvoltage protection described in the present embodiment 102 can be gas discharge tube, and its through flow velocity is fast, can discharge fast overcurrent;
Described secondary lightning protection circuit 30 is two-way transient voltage twin zener dioder (TVS), and described two-way transient voltage twin zener dioder 301 is connected between described direct-current tie and the described direct current return wire;
After one-level lightning protection circuit 10 discharges most overcurrent, further discharged by secondary lightning protection circuit 30, assurance is restricted to low-down level with the Overvoltage Amplitude between direct-current tie and the direct current return wire, realizes low residual voltage, effectively protects DC power supply input port circuit; The utility model adopts two-way transient voltage twin zener dioder TVS, when the high rush of current of moment is stood at TVS pipe two ends, can absorb surge current with high speed, with the voltage clamp between its two ends on a predetermined numerical value, reduce residual voltage, thereby the DC power supply entrance of guaranteeing the rear end is avoided the high-octane impact of transient state and is damaged; And secondary lightning protection circuit 30 adopts the TVS pipe, guarantees that the utility model lightning protection device volume is little, and cost is low;
Described one-level lightning protection circuit 10 is connected with described secondary lightning protection circuit 30 by described decoupling component 20; One of them described decoupling component 20 is connected on the dc feeder between described one-level lightning protection circuit 10 and the described secondary lightning protection circuit 30, and another described decoupling component 20 is connected on the direct current return wire between described one-level lightning protection circuit 10 and the described secondary lightning protection circuit 30; Particularly, as shown in Figure 1, in the present embodiment, described decoupling component 20 can be air-core inductance, described two air-core inductances be connected on respectively on the direct-current tie and the direct current return wire on, cause the thunder-strike current can not transition, stoped thunder-strike current to pass through fast, most of overcurrent is released in one-level lightning protection circuit 10 when guaranteeing thunderbolt, and it is lower to flow to the overcurrent magnitude of secondary lightning protection circuit 30, thereby reaches lightning protection function;
In a preferred embodiment; also comprise overload protection device 40; described overload protection device is connected on the described direct-current tie of described one-level lightning protection circuit 10 front ends; described overload protection device 40 can be fuse; be used for preventing that the circuit overcurrent to the damage of back end device, further improving the fail safe of circuit.
The lightning protection device of the utility model DC power supply, the one-level lightning protection circuit 10 in the device adopts Temperature protection type piezo-resistance as lightning protection component, has advantages of that security performance is high, discharge capacity is large, volume is little; The decoupling component air-core inductance is set as decoupling component 20 before secondary lightning protection circuit 30, guarantee that one-level lightning protection circuit 10 discharges most of overcurrent, and secondary lightning protection circuit 30 adopts two-way transient voltage twin zener dioder 301, two-way transient voltage twin zener dioder 301 volumes are little, reaction is fast, can further reduce the residual voltage of lightning protection device; The utility model lightning protection effect is better, and residual voltage is little, volume is little, cost is low; Practicality is high, can be applicable to the occasion of various DC power supply input port lightning protection, and preferably application prospect is particularly arranged in the direct-current input-type communication 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 claim.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 (5)

1. the lightning protection device of a DC power supply is characterized in that, comprises one-level lightning protection circuit, secondary lightning protection circuit and two decoupling components;
Described one-level lightning protection circuit comprises Temperature protection type piezo-resistance and overvoltage protection device, and described Temperature protection type piezo-resistance is connected between the direct-current tie and direct current return wire of DC power supply, and by described overvoltage protection device ground connection;
Described secondary lightning protection circuit is two-way transient voltage twin zener dioder, and described transient voltage twin zener dioder is connected between described direct-current tie and the described direct current return wire;
Described one-level lightning protection circuit is connected with described secondary lightning protection circuit by described decoupling component; One of them described decoupling component is connected on the dc feeder between described one-level lightning protection circuit and the described secondary lightning protection circuit, and another described decoupling component is connected on the direct current return wire between described one-level lightning protection circuit and the described secondary lightning protection circuit.
2. the lightning protection device of DC power supply according to claim 1 is characterized in that, described decoupling component is air-core inductance.
3. the lightning protection device of DC power supply according to claim 1 is characterized in that, described overvoltage protection device is gas discharge tube.
4. the lightning protection device of DC power supply according to claim 1 is characterized in that, also comprises overload protection device, and described overload protection device is connected on the described direct-current tie of described one-level lightning protection circuit front end.
5. the lightning protection device of DC power supply according to claim 4 is characterized in that, described overload protection device is fuse.
CN 201220366989 2012-07-26 2012-07-26 Lightning protection device of direct-current power supply CN202917967U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220366989 CN202917967U (en) 2012-07-26 2012-07-26 Lightning protection device of direct-current power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220366989 CN202917967U (en) 2012-07-26 2012-07-26 Lightning protection device of direct-current power supply

Publications (1)

Publication Number Publication Date
CN202917967U true CN202917967U (en) 2013-05-01

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104218562A (en) * 2014-09-30 2014-12-17 成都思迈科技发展有限责任公司 Direct-current power source lightning protection circuit
CN104253426A (en) * 2014-09-03 2014-12-31 烽火通信科技股份有限公司 Lightning protection circuit and lightning protection method for direct-current power supply port of communication equipment
CN104466933A (en) * 2013-09-18 2015-03-25 深圳市海洋王照明工程有限公司 Energy-limiting explosion-proof circuit
CN105048433A (en) * 2015-07-01 2015-11-11 山东超越数控电子有限公司 Surge protection design method for DC-DC power supply
CN106026627A (en) * 2016-06-30 2016-10-12 山东超越数控电子有限公司 Method for improving surge immunity of switching power supply
CN106786445A (en) * 2015-11-20 2017-05-31 中车大连电力牵引研发中心有限公司 Lightning protection module of power source and system
CN107134766A (en) * 2017-04-27 2017-09-05 华为技术有限公司 A kind of lightning protection circuit

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104466933B (en) * 2013-09-18 2018-11-06 深圳市海洋王照明工程有限公司 A kind of limit energy intrinsically safe circuit
CN104466933A (en) * 2013-09-18 2015-03-25 深圳市海洋王照明工程有限公司 Energy-limiting explosion-proof circuit
CN104253426A (en) * 2014-09-03 2014-12-31 烽火通信科技股份有限公司 Lightning protection circuit and lightning protection method for direct-current power supply port of communication equipment
CN104218562A (en) * 2014-09-30 2014-12-17 成都思迈科技发展有限责任公司 Direct-current power source lightning protection circuit
CN105048433A (en) * 2015-07-01 2015-11-11 山东超越数控电子有限公司 Surge protection design method for DC-DC power supply
CN106786445A (en) * 2015-11-20 2017-05-31 中车大连电力牵引研发中心有限公司 Lightning protection module of power source and system
CN106026627A (en) * 2016-06-30 2016-10-12 山东超越数控电子有限公司 Method for improving surge immunity of switching power supply
CN107134766A (en) * 2017-04-27 2017-09-05 华为技术有限公司 A kind of lightning protection circuit
CN107134766B (en) * 2017-04-27 2019-08-16 华为技术有限公司 A kind of lightning protection circuit

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Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
TR01 Transfer of patent right

Effective date of registration: 20180305

Address after: 510663 Shenzhou Road, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangdong, 10

Co-patentee after: Comba Telecom Systems (Guangzhou) Co., Ltd.

Patentee after: Comba Telecom System (China) Co., Ltd.

Co-patentee after: Jingxin Communication Technology (Guangzhou) Co., Ltd.

Co-patentee after: TIANJIN COMBA TELECOM SYSTEMS CO., LTD.

Address before: 510663 Guangdong city of Guangzhou province Guangzhou economic and Technological Development Zone Jinbi Road No. 6

Patentee before: Jingxin Communication Technology (Guangzhou) Co., Ltd.

Effective date of registration: 20180305

Address after: 510663 Shenzhou Road, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangdong, 10

Co-patentee after: Comba Telecom Systems (Guangzhou) Co., Ltd.

Patentee after: Comba Telecom System (China) Co., Ltd.

Co-patentee after: Jingxin Communication Technology (Guangzhou) Co., Ltd.

Co-patentee after: TIANJIN COMBA TELECOM SYSTEMS CO., LTD.

Address before: 510663 Guangdong city of Guangzhou province Guangzhou economic and Technological Development Zone Jinbi Road No. 6

Patentee before: Jingxin Communication Technology (Guangzhou) Co., Ltd.

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20200119

Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong

Patentee after: Jingxin Communication System (China) Co., Ltd.

Address before: 510663 Shenzhou Road, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangdong, 10

Co-patentee before: Jingxin Communication System (Guangzhou) Co., Ltd.

Patentee before: Jingxin Communication System (China) Co., Ltd.

Co-patentee before: Jingxin Communication Technology (Guangzhou) Co., Ltd.

Co-patentee before: TIANJIN COMBA TELECOM SYSTEMS CO., LTD.

TR01 Transfer of patent right