WO2020073621A1 - Lightning surge inhibiting circuit and drive power supply - Google Patents

Lightning surge inhibiting circuit and drive power supply Download PDF

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Publication number
WO2020073621A1
WO2020073621A1 PCT/CN2019/080578 CN2019080578W WO2020073621A1 WO 2020073621 A1 WO2020073621 A1 WO 2020073621A1 CN 2019080578 W CN2019080578 W CN 2019080578W WO 2020073621 A1 WO2020073621 A1 WO 2020073621A1
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WO
WIPO (PCT)
Prior art keywords
circuit
varistor
suppression circuit
lightning
discharge tube
Prior art date
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PCT/CN2019/080578
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French (fr)
Chinese (zh)
Inventor
江军
邹超洋
王宗友
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深圳市崧盛电子股份有限公司
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Publication of WO2020073621A1 publication Critical patent/WO2020073621A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Definitions

  • the present invention relates to the technical field of power supply, and more specifically, to a lightning surge suppression circuit and a driving power supply.
  • LEDs are gradually replacing traditional lighting sources, and are getting more and more widely used in various lighting fields.
  • level of urban road basic lighting construction has become an important symbol of the speed and level of urban development.
  • the quality of lighting projects not only affects the safety of vehicles and pedestrians, but also relates to energy conservation and environmental protection goals. Can it be achieved.
  • the power supply in addition to the basic electrical performance of the power supply, the power supply must also meet different grid voltage requirements, safety requirements, and EMC requirements. More importantly, lightning protection and surge protection must comply with IEC61000-4-5 or GB / T17626.5 2008 standard requirements. Many power supply manufacturers do not pay enough attention to anti-lightning and anti-surge, and the lighting power supply used in outdoor occasions cannot even reach the 4KV 8 / 20US combined wave. The result is that it can be applied to street lights, tunnel lights, landscape lights, industrial and mining Lights, buried lights and other occasions are even sold to areas or remote areas where the thunderstorm season is more frequent. After a period of time, the lights will gradually turn off.
  • the technical problem to be solved by the present invention is to provide a lightning surge suppression circuit and a driving power supply in view of the above defects of the prior art.
  • the technical solution adopted by the present invention to solve its technical problems is to construct a lightning surge suppression circuit, including a fuse, a first suppression circuit, a second suppression circuit, a bleeder circuit and an equalization circuit;
  • the fuse is connected to the live line, the first suppression circuit is connected to the neutral line and the live line, the second suppression circuit is connected to the live line and the neutral line, and the relief circuit is connected to the second suppression circuit And the ground wire, the equalization circuit is respectively connected to the second suppression circuit and the bleeder circuit;
  • the fuse and the first suppression circuit suppress the voltage generated by the lightning strike to the clamping voltage of the first suppression circuit; or the fuse, the second suppression circuit, and the
  • the equalization circuit and the bleeder circuit connect the AC circuit to ground, and discharge the voltage generated by the lightning strike to the ground.
  • the first suppression circuit includes a first varistor
  • the first end of the first varistor is connected to the live wire, and the second end of the first varistor is connected to the neutral wire.
  • the second suppression circuit includes: a second varistor and a third varistor;
  • the first end of the second varistor is connected to the neutral line, the second end of the second varistor is connected to the bleeder circuit; the first end of the third varistor is connected to the live wire , The second end of the third varistor is connected to the second end of the second varistor.
  • the bleeder circuit includes: a first discharge tube and a second discharge tube;
  • the first end of the first discharge tube is connected to the second suppression circuit, the second end of the first discharge tube is connected to the first end of the second discharge tube, and the second end of the second discharge tube Connect the ground wire.
  • the equalization circuit includes: an equalization capacitor;
  • the equalizing capacitor is connected in parallel at both ends of the first discharge tube.
  • the capacitor is a ceramic chip capacitor.
  • the first discharge tube is a gas discharge tube
  • the second discharge tube is a solid discharge tube
  • the first varistor is zinc oxide varistor, silicon carbide varistor, metal oxide varistor, germanium (silicon) varistor, barium titanate varistor At least one.
  • the second varistor and the third varistor are zinc oxide varistor, silicon carbide varistor, metal oxide varistor, germanium (silicon) varistor, At least one of barium titanate varistor.
  • the invention also provides a driving power supply including the above-mentioned lightning surge suppression circuit.
  • the lightning surge suppression circuit includes a fuse, a first suppression circuit, a second suppression circuit, a bleeder circuit, and an equalization circuit;
  • the fuse is connected to FireWire, the first The suppression circuit is connected to the neutral wire and the live wire, the second suppression circuit is connected to the live wire and the neutral wire, the relief circuit is connected to the second suppression circuit and the ground wire, and the equalization circuit is connected to the second suppression circuit and the relief circuit respectively; when the AC circuit is struck by lightning, The fuse and the first suppression circuit suppress the voltage generated by the lightning strike to the clamping voltage of the first suppression circuit; or the fuse, the second suppression circuit, the equalization circuit, and the bleeder circuit connect the AC circuit to ground to connect the voltage generated by the lightning strike Vent to the ground.
  • This solution can effectively suppress the lightning surge protection drive power supply and LED lights when outdoors, and can also effectively suppress the impulse voltage at the time of lightning induction indoors, and finally effectively protect indoor household appliances, electric meters and other instruments and equipment, with good
  • FIG. 1 is a schematic structural diagram of a lightning surge suppression circuit provided by an embodiment of the present invention.
  • FIG. 2 is a circuit diagram of a lightning surge suppression circuit provided by an embodiment of the present invention.
  • FIG. 1 it is a schematic structural diagram of a lightning surge suppression circuit provided by an embodiment provided by an embodiment of the present invention.
  • the circuit can be applied to a driving power supply to suppress the instantaneous high voltage and large current generated by a lightning surge, and further It can effectively avoid damage to the driving power supply and load, and improve the reliability of the driving power supply.
  • the driving power supply includes but is not limited to the LED driving power supply.
  • a lightning surge suppression circuit provided in this embodiment includes 1.
  • a lightning surge suppression circuit is characterized by including a fuse F1, a first suppression circuit 10, and a second suppression circuit 20.
  • the fuse F1 is connected to the live line
  • the first suppression circuit 10 is connected to the neutral line and the live line
  • the second suppression circuit 20 is connected to the live line and the neutral line
  • the relief circuit 30 is connected to the second suppression circuit 20 and the ground line
  • the equalization circuit 40 is connected to the The suppression circuit 20 and the bleeder circuit 30.
  • the fuse F1 and the first suppression circuit 10 suppress the voltage generated by the lightning strike at the clamping voltage of the first suppression circuit 10; or the fuse F1, the second suppression circuit 20, the equalization circuit 40, and the discharge
  • the circuit 30 connects the AC circuit to ground and discharges the voltage generated by the lightning strike to ground.
  • the lightning strike signal is a differential mode signal
  • the first suppression circuit 10 clamps the voltage of the differential mode signal to its clamping voltage to reduce
  • the surge signal entering the power supply effectively protects the power supply and the load (such as LED lights).
  • the second suppression circuit 20 when the lightning strike signal is a common-mode signal, after the common-mode signal passes through the fuse F1, the second suppression circuit 20 first absorbs the common-mode signal, and after the second suppression circuit 20 absorbs the remaining maximum Part of the voltage is discharged to the ground by the bleeder circuit 30 to prevent the lightning strike signal from entering the power supply and causing damage to the power supply.
  • the equalization circuit 40 can accelerate the discharge circuit 30 to discharge the lightning signal to the ground.
  • FIG. 2 is a circuit diagram of a lightning surge suppression circuit according to a preferred embodiment of the present invention.
  • ACL represents the live line
  • ACN represents the zero line
  • PG represents the ground line
  • the first suppression circuit 10 includes a first varistor MOV1.
  • the first end of the first varistor MOV1 is connected to the live wire, and the second end of the first varistor MOV1 is connected to the neutral wire.
  • the lightning strike signal is an instantaneous voltage and large current. If the generated lightning surge signal is a differential mode signal, the differential module signal passes through the fuse F1 and enters the first varistor MOV1.
  • the first varistor MOV1 suppresses the voltage of the differential mode signal at its clamp Voltage, so that the remaining residual voltage can be reduced to a very low level, the residual voltage input to the subsequent circuit is not enough to damage the drive power, can effectively protect the drive power and LED lights.
  • the first varistor MOV1 may be zinc oxide varistor, silicon carbide varistor, metal oxide varistor, germanium (silicon) varistor, barium titanate At least one of the varistor.
  • the second suppression circuit 20 includes: a second varistor MOV2 and a third varistor MOV3.
  • the first end of the second varistor MOV2 is connected to the neutral line, the second end of the second varistor MOV2 is connected to the bleeder circuit 30; the first end of the third varistor MOV3 is connected to the live wire, and the third varistor MOV3 The second end is connected to the second end of the second piezoresistor.
  • the second varistor MOV2 and the third varistor MOV3 may be zinc oxide varistor, silicon carbide varistor, metal oxide varistor, germanium (silicon) At least one of a varistor and a barium titanate varistor.
  • the bleeder circuit 30 includes: a first discharge tube FDG1 and a second discharge tube FDG2.
  • the first end of the first discharge tube FDG1 is connected to the second suppression circuit 20
  • the second end of the first discharge tube FDG1 is connected to the first end of the second discharge tube FDG2
  • the second end of the second discharge tube FDG2 is connected to the ground.
  • the first discharge tube FDG1 is a gas discharge tube.
  • the second discharge tube FDG2 is a solid discharge tube, such as a TVS tube.
  • the equalization circuit 40 includes: an equalization capacitor CY2.
  • the equalizing capacitor CY2 is connected in parallel at both ends of the first discharge tube FDG1.
  • the equalizing capacitor CY2 is a ceramic chip capacitor.
  • the lightning strike signal when the AC circuit encounters a lightning strike to generate a lightning strike signal, the lightning strike signal is an instantaneous voltage and large current. If the lightning strike signal is a common mode signal, the common mode signal enters the second varistor MOV2 and the third varistor MOV3, and the second varistor MOV2 and the third varistor MOV3 respectively suppress the common mode signal At the respective clamping voltage, the remaining voltage is discharged to the ground through the first discharge tube FDG1 and the second discharge tube FDG2.
  • the ceramic capacitors are connected in parallel at both ends of the first discharge tube FDG1 to make the section capacitance of the first discharge tube FDG1 and the section capacitance of the second discharge tube FDG2 equal, so as to equalize the voltages of the first discharge tube FDG1 and the second discharge tube FDG2
  • the effect of the first discharge tube FDG1 and the second discharge tube FDG2 is to discharge most of the instantaneous surge voltage to the ground through the ground wire, so that the remaining residual voltage can be reduced to a very low level.
  • the residual voltage in the level circuit is not enough to damage the drive power, which can effectively protect the drive power and LED lights.
  • the lightning surge suppression circuit does not work
  • the voltage of the power grid directly supplies power to the subsequent circuit after passing through the fuse F1.
  • the lightning surge suppression circuit works only when a lightning strike is encountered, and the residual voltage of the lightning strike surge can be suppressed to a lower level, reducing the damage to the drive power supply caused by the lightning strike, and improving the reliability and safety of the drive power supply.
  • the lightning surge suppression circuit has a simple structure, convenient debugging, small size and low cost, and can be widely used in different power supply fields.
  • the present invention also provides a driving power supply, which includes the aforementioned lightning surge suppression circuit.
  • the driving power includes but is not limited to LED driving power.
  • the drive power supply is equipped with the above lightning surge suppression circuit. When used outdoors, it can effectively suppress the lightning surge protection and protect the drive power supply and LED lights. When used indoors, it can also effectively suppress the pulse voltage of the instant lightning strike, which is finally effective. It protects indoor household appliances, electric meters and other instruments and equipment, and is very practical.

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  • Emergency Protection Circuit Devices (AREA)

Abstract

The present invention relates to a lightning surge inhibiting circuit and a drive power supply, comprising a fuse, a first inhibiting circuit, a second inhibiting circuit, a bleeder circuit and an equalization circuit; the fuse accesses a hot wire, the first inhibiting circuit is connected to a neutral wire and the hot wire, the second inhibiting circuit is connected to the hot wire and the neutral wire, the bleeder circuit is connected to the second inhibiting circuit and a ground wire, and the equalization circuit is respectively connected to the second inhibiting circuit and the bleeder circuit; when an alternating current circuit is struck by lightning, the fuse and the first inhibiting circuit inhibit the voltage produced by the lightning at the clamping voltage of the first suppression circuit; or, the fuse, the second inhibiting circuit, the equalization circuit, and the bleeder circuit connect the alternating current circuit to the ground to bleed the voltage produced by the lightning to the ground. When used outdoors, the present solution may effectively inhibit lightning surges and protect a drive power supply and LED lamps; when used indoors, the present solution may also effectively inhibit the pulse voltage at the moment at which lightning is sensed, and ultimately effectively protect indoor household appliances and instrument devices such as electric meters, the present solution being safe and practical.

Description

一种抑制雷击浪涌电路及驱动电源Lightning surge suppression circuit and driving power supply 技术领域Technical field
本发明涉及电源技术领域，更具体地说，涉及一种抑制雷击浪涌电路及驱动电源。The present invention relates to the technical field of power supply, and more specifically, to a lightning surge suppression circuit and a driving power supply.
背景技术Background technique
LED正在逐步取代传统的照明光源，在各个照明领域中得到越来越广泛的应用。随着社会经济建设的日益发展，城市道路基础照明建设水平已经成为城市发展速度快慢与水平高低的重要标志，照明工程质量优劣不仅影响到车辆及行人的安全与否，也关系到节能环保目标能否实现。LEDs are gradually replacing traditional lighting sources, and are getting more and more widely used in various lighting fields. With the increasing development of social and economic construction, the level of urban road basic lighting construction has become an important symbol of the speed and level of urban development. The quality of lighting projects not only affects the safety of vehicles and pedestrians, but also relates to energy conservation and environmental protection goals. Can it be achieved.
当前道路照明能耗十分严重，存在的主要问题有照明***设计超标、照明控制方式落后、照明节能理念有误、照明节能措施单一，更不重要的是雷击浪涌问题等。户外照明是不管天气是晴朗天还是雷雨都要能正常工作，但如果电源没有防雷击、浪涌电路或防防雷击、浪涌电路处理不当，导致整灯不能正常工作了。At present, road lighting energy consumption is very serious. The main problems are that the design of the lighting system exceeds the standard, the lighting control method is backward, the lighting energy saving concept is wrong, the lighting energy saving measures are single, and the less important is the problem of lightning surge. Outdoor lighting can work normally regardless of whether the weather is sunny or thunderstorms, but if the power supply does not have lightning protection, surge circuits or lightning protection, surge circuits are not handled properly, resulting in the entire lamp not working properly.
因此，电源除了要达到电源基本的电气性能外，还必须符合不同的电网电压要求、安规要求、EMC要求，更重要的防雷击防浪涌，一定要符合IEC61000-4-5或GB/T17626.5  2008标准要求。很多电源制造厂商对防雷击防浪涌不够重视，对应用在户外场合的照明电源连4KV的8/20US组合波也达不到，结果喧称可以应用在路灯、隧道灯、景观灯、工矿灯、埋地灯等场合，甚至销往雷雨季节比较频繁的地区或偏远区域，经过一段时间后灯就陆续出现不亮的了。尤其是在高速路、机场、码头等交通要道出现此种现象时，检修拆装的工艺繁锁，增加维修成本。而应用在户外灯，雷击、浪涌是一个非常大的威胁，轻则导致电源和灯损坏，重则引起火灾或人员伤亡，产生巨大的损失。Therefore, in addition to the basic electrical performance of the power supply, the power supply must also meet different grid voltage requirements, safety requirements, and EMC requirements. More importantly, lightning protection and surge protection must comply with IEC61000-4-5 or GB / T17626.5 2008 standard requirements. Many power supply manufacturers do not pay enough attention to anti-lightning and anti-surge, and the lighting power supply used in outdoor occasions cannot even reach the 4KV 8 / 20US combined wave. The result is that it can be applied to street lights, tunnel lights, landscape lights, industrial and mining Lights, buried lights and other occasions are even sold to areas or remote areas where the thunderstorm season is more frequent. After a period of time, the lights will gradually turn off. Especially when this phenomenon occurs on the main highways such as highways, airports, and docks, the process of overhauling and disassembling is complicated, which increases the maintenance cost. When applied to outdoor lights, lightning strikes and surges are a very big threat, ranging from damage to power supplies and lights, to fire or casualties, and huge losses.
技术问题technical problem
本发明要解决的技术问题在于，针对现有技术的上述缺陷，提供一种抑制雷击浪涌电路及驱动电源。The technical problem to be solved by the present invention is to provide a lightning surge suppression circuit and a driving power supply in view of the above defects of the prior art.
技术解决方案Technical solution
本发明解决其技术问题所采用的技术方案是：构造一种抑制雷击浪涌电路，包括保险管、第一抑制电路、第二抑制电路、泄放电路以及均衡电路；The technical solution adopted by the present invention to solve its technical problems is to construct a lightning surge suppression circuit, including a fuse, a first suppression circuit, a second suppression circuit, a bleeder circuit and an equalization circuit;
所述保险管接入火线，所述第一抑制电路连接零线和所述火线，所述第二抑制电路连接所述火线和所述零线，所述泄放电路连接所述第二抑制电路和地线，所述均衡电路分别连接所述第二抑制电路和所述泄放电路；The fuse is connected to the live line, the first suppression circuit is connected to the neutral line and the live line, the second suppression circuit is connected to the live line and the neutral line, and the relief circuit is connected to the second suppression circuit And the ground wire, the equalization circuit is respectively connected to the second suppression circuit and the bleeder circuit;
在交流电路遭遇雷击时，所述保险管和所述第一抑制电路将雷击产生的电压抑制在所述第一抑制电路的钳位电压；或者所述保险管、所述第二抑制电路、所述均衡电路、所述泄放电路将交流电路与地连接，将雷击产生的电压泄放到地。When the AC circuit encounters a lightning strike, the fuse and the first suppression circuit suppress the voltage generated by the lightning strike to the clamping voltage of the first suppression circuit; or the fuse, the second suppression circuit, and the The equalization circuit and the bleeder circuit connect the AC circuit to ground, and discharge the voltage generated by the lightning strike to the ground.
优选地，所述第一抑制电路包括第一压敏电阻；Preferably, the first suppression circuit includes a first varistor;
所述第一压敏电阻的第一端连接所述火线，所述第一压敏电阻的第二端连接所述零线。The first end of the first varistor is connected to the live wire, and the second end of the first varistor is connected to the neutral wire.
优选地，所述第二抑制电路包括：第二压敏电阻和第三压敏电阻；Preferably, the second suppression circuit includes: a second varistor and a third varistor;
所述第二压敏电阻的第一端连接所述零线，所述第二压敏电阻的第二端连接所述泄放电路；所述第三压敏电阻的第一端连接所述火线，所述第三压敏电阻的第二端连接所述第二压电阻的第二端。The first end of the second varistor is connected to the neutral line, the second end of the second varistor is connected to the bleeder circuit; the first end of the third varistor is connected to the live wire , The second end of the third varistor is connected to the second end of the second varistor.
优选地，所述泄放电路包括：第一放电管和第二放电管；Preferably, the bleeder circuit includes: a first discharge tube and a second discharge tube;
所述第一放电管的第一端连接所述第二抑制电路，所述第一放电管的第二端连接所述第二放电管的第一端，所述第二放电管的第二端连接所述地线。The first end of the first discharge tube is connected to the second suppression circuit, the second end of the first discharge tube is connected to the first end of the second discharge tube, and the second end of the second discharge tube Connect the ground wire.
优选地，所述均衡电路包括：均衡电容；Preferably, the equalization circuit includes: an equalization capacitor;
所述均衡电容并联在所述第一放电管的两端。The equalizing capacitor is connected in parallel at both ends of the first discharge tube.
优选地，所述电容为瓷片电容。Preferably, the capacitor is a ceramic chip capacitor.
优选地，所述第一放电管为气体放电管，所述第二放电管为固体放电管。Preferably, the first discharge tube is a gas discharge tube, and the second discharge tube is a solid discharge tube.
优选地，所述第一压敏电阻为氧化锌压敏电阻器、碳化硅压敏电阻器、金属氧化物压敏电阻器、锗（硅）压敏电阻器、钛酸钡压敏电阻器中的至少一种。Preferably, the first varistor is zinc oxide varistor, silicon carbide varistor, metal oxide varistor, germanium (silicon) varistor, barium titanate varistor At least one.
优选地，所述第二压敏电阻和所述第三压敏电阻为氧化锌压敏电阻器、碳化硅压敏电阻器、金属氧化物压敏电阻器、锗（硅）压敏电阻器、钛酸钡压敏电阻器中的至少一种。Preferably, the second varistor and the third varistor are zinc oxide varistor, silicon carbide varistor, metal oxide varistor, germanium (silicon) varistor, At least one of barium titanate varistor.
本发明还提供一种驱动电源，包括以上所述的抑制雷击浪涌电路。The invention also provides a driving power supply including the above-mentioned lightning surge suppression circuit.
有益效果Beneficial effect
实施本发明的抑制雷击浪涌电路，具有以下有益效果：该抑制雷击浪涌电路包括保险管、第一抑制电路、第二抑制电路、泄放电路以及均衡电路；保险管接入火线，第一抑制电路连接零线和火线，第二抑制电路连接火线和零线，泄放电路连接第二抑制电路和地线，均衡电路分别连接第二抑制电路和泄放电路；在交流电路遭遇雷击时，保险管和第一抑制电路将雷击产生的电压抑制在第一抑制电路的钳位电压；或者保险管、第二抑制电路、均衡电路、泄放电路将交流电路与地连接，将雷击产生的电压泄放到地。本方案在户外时可以有效抑制雷击浪涌保护驱动电源和LED灯，在室内也可以有效抑制感应雷电瞬间的脉冲电压，最终有效保护室内家用电器、电表等仪器设备，安全性、实用性好。The implementation of the lightning surge suppression circuit of the present invention has the following beneficial effects: the lightning surge suppression circuit includes a fuse, a first suppression circuit, a second suppression circuit, a bleeder circuit, and an equalization circuit; the fuse is connected to FireWire, the first The suppression circuit is connected to the neutral wire and the live wire, the second suppression circuit is connected to the live wire and the neutral wire, the relief circuit is connected to the second suppression circuit and the ground wire, and the equalization circuit is connected to the second suppression circuit and the relief circuit respectively; when the AC circuit is struck by lightning, The fuse and the first suppression circuit suppress the voltage generated by the lightning strike to the clamping voltage of the first suppression circuit; or the fuse, the second suppression circuit, the equalization circuit, and the bleeder circuit connect the AC circuit to ground to connect the voltage generated by the lightning strike Vent to the ground. This solution can effectively suppress the lightning surge protection drive power supply and LED lights when outdoors, and can also effectively suppress the impulse voltage at the time of lightning induction indoors, and finally effectively protect indoor household appliances, electric meters and other instruments and equipment, with good safety and practicality.
附图说明BRIEF DESCRIPTION
下面将结合附图及实施例对本发明作进一步说明，附图中：The present invention will be further described below with reference to the drawings and embodiments. In the drawings:
图1是本发明实施例提供的一种抑制雷击浪涌电路的结构示意图；1 is a schematic structural diagram of a lightning surge suppression circuit provided by an embodiment of the present invention;
图2是本发明实施例提供的一种抑制雷击浪涌电路的电路图。2 is a circuit diagram of a lightning surge suppression circuit provided by an embodiment of the present invention.
本发明的最佳实施方式Best Mode of the Invention
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图进行详细说明。In order to have a clearer understanding of the technical features, purposes and effects of the present invention, detailed description will now be made with reference to the drawings.
参考图1，为本发明实施例提供的实施例提供的一种抑制雷击浪涌电路的结构示意图，该电路可以应用于驱动电源中，以抑制雷击浪涌产生的瞬间高电压和大电流，进而可以有效避免驱动电源及负载被损坏，提升驱动电源的可靠性。其中，驱动电源包括但不限于LED驱动电源。Referring to FIG. 1, it is a schematic structural diagram of a lightning surge suppression circuit provided by an embodiment provided by an embodiment of the present invention. The circuit can be applied to a driving power supply to suppress the instantaneous high voltage and large current generated by a lightning surge, and further It can effectively avoid damage to the driving power supply and load, and improve the reliability of the driving power supply. Wherein, the driving power supply includes but is not limited to the LED driving power supply.
如图1所示，本实施例提供的一种抑制雷击浪涌电路包括1、一种抑制雷击浪涌电路，其特征在于，包括保险管F1、第一抑制电路10、第二抑制电路20、泄放电路30以及均衡电路40。As shown in FIG. 1, a lightning surge suppression circuit provided in this embodiment includes 1. A lightning surge suppression circuit is characterized by including a fuse F1, a first suppression circuit 10, and a second suppression circuit 20. The bleeder circuit 30 and the equalizing circuit 40.
保险管F1接入火线，第一抑制电路10连接零线和火线，第二抑制电路20连接火线和零线，泄放电路30连接第二抑制电路20和地线，均衡电路40分别连接第二抑制电路20和泄放电路30。The fuse F1 is connected to the live line, the first suppression circuit 10 is connected to the neutral line and the live line, the second suppression circuit 20 is connected to the live line and the neutral line, the relief circuit 30 is connected to the second suppression circuit 20 and the ground line, and the equalization circuit 40 is connected to the The suppression circuit 20 and the bleeder circuit 30.
在交流电路遭遇雷击时，保险管F1和第一抑制电路10将雷击产生的电压抑制在第一抑制电路10的钳位电压；或者保险管F1、第二抑制电路20、均衡电路40、泄放电路30将交流电路与地连接，将雷击产生的电压泄放到地。其中，在交流电路遭遇雷击时，如果雷击信号为差模信号，则该差模信号经过保险管F1后，由第一抑制电路10将该差模信号的电压钳位于其钳位电压，以降低进入电源的浪涌信号，有效保护电源和负载（如LED灯）。或者，当雷击信号为共模信号时，则该共模信号经过保险管F1后，先由第二抑制电路20对该共模信号进行吸收，经该第二抑制电路20吸收后剩余的绝大部分电压由泄放电路30泄放在大地，避免该雷击信号进入电源导致电源损坏。其中，均衡电路40可以加快泄放电路30将雷击信号泄放至大地。When the AC circuit encounters a lightning strike, the fuse F1 and the first suppression circuit 10 suppress the voltage generated by the lightning strike at the clamping voltage of the first suppression circuit 10; or the fuse F1, the second suppression circuit 20, the equalization circuit 40, and the discharge The circuit 30 connects the AC circuit to ground and discharges the voltage generated by the lightning strike to ground. Among them, when the AC circuit encounters a lightning strike, if the lightning strike signal is a differential mode signal, after the differential mode signal passes through the fuse F1, the first suppression circuit 10 clamps the voltage of the differential mode signal to its clamping voltage to reduce The surge signal entering the power supply effectively protects the power supply and the load (such as LED lights). Or, when the lightning strike signal is a common-mode signal, after the common-mode signal passes through the fuse F1, the second suppression circuit 20 first absorbs the common-mode signal, and after the second suppression circuit 20 absorbs the remaining maximum Part of the voltage is discharged to the ground by the bleeder circuit 30 to prevent the lightning strike signal from entering the power supply and causing damage to the power supply. Among them, the equalization circuit 40 can accelerate the discharge circuit 30 to discharge the lightning signal to the ground.
参考图2，为本发明优选实施例的抑制雷击浪涌电路的电路图。2 is a circuit diagram of a lightning surge suppression circuit according to a preferred embodiment of the present invention.
在该实施例中，如图2所示，ACL表示火线，ACN表示零线，PG表示地线。In this embodiment, as shown in FIG. 2, ACL represents the live line, ACN represents the zero line, and PG represents the ground line.
如图2所示，该实施例中，第一抑制电路10包括第一压敏电阻MOV1。第一压敏电阻MOV1的第一端连接火线，第一压敏电阻MOV1的第二端连接零线。As shown in FIG. 2, in this embodiment, the first suppression circuit 10 includes a first varistor MOV1. The first end of the first varistor MOV1 is connected to the live wire, and the second end of the first varistor MOV1 is connected to the neutral wire.
如图2所示，当交流电路遭遇雷击时，该雷击信号为瞬间的电压和大电流。若所产生的雷击浪涌信号为差模信号，该差模块信号经过保险管F1后，进入第一压敏电阻MOV1，由第一压敏电阻MOV1将该差模信号的电压抑制在其钳位电压，使剩下的残压可以降至极低，输入到后级电路中的残压不足以使驱动电源损坏，可有效地保护驱动电源和LED灯。As shown in Figure 2, when the AC circuit encounters a lightning strike, the lightning strike signal is an instantaneous voltage and large current. If the generated lightning surge signal is a differential mode signal, the differential module signal passes through the fuse F1 and enters the first varistor MOV1. The first varistor MOV1 suppresses the voltage of the differential mode signal at its clamp Voltage, so that the remaining residual voltage can be reduced to a very low level, the residual voltage input to the subsequent circuit is not enough to damage the drive power, can effectively protect the drive power and LED lights.
可选地，该实施例中，第一压敏电阻MOV1可以氧化锌压敏电阻器、碳化硅压敏电阻器、金属氧化物压敏电阻器、锗（硅）压敏电阻器、钛酸钡压敏电阻器中的至少一种。Optionally, in this embodiment, the first varistor MOV1 may be zinc oxide varistor, silicon carbide varistor, metal oxide varistor, germanium (silicon) varistor, barium titanate At least one of the varistor.
该实施例中，第二抑制电路20包括：第二压敏电阻MOV2和第三压敏电阻MOV3。In this embodiment, the second suppression circuit 20 includes: a second varistor MOV2 and a third varistor MOV3.
第二压敏电阻MOV2的第一端连接零线，第二压敏电阻MOV2的第二端连接泄放电路30；第三压敏电阻MOV3的第一端连接火线，第三压敏电阻MOV3的第二端连接第二压电阻的第二端。The first end of the second varistor MOV2 is connected to the neutral line, the second end of the second varistor MOV2 is connected to the bleeder circuit 30; the first end of the third varistor MOV3 is connected to the live wire, and the third varistor MOV3 The second end is connected to the second end of the second piezoresistor.
可选的，该实施例中，第二压敏电阻MOV2和第三压敏电阻MOV3可以为氧化锌压敏电阻器、碳化硅压敏电阻器、金属氧化物压敏电阻器、锗（硅）压敏电阻器、钛酸钡压敏电阻器中的至少一种。Optionally, in this embodiment, the second varistor MOV2 and the third varistor MOV3 may be zinc oxide varistor, silicon carbide varistor, metal oxide varistor, germanium (silicon) At least one of a varistor and a barium titanate varistor.
再如图2所示，该实施例中，泄放电路30包括：第一放电管FDG1和第二放电管FDG2。As shown in FIG. 2 again, in this embodiment, the bleeder circuit 30 includes: a first discharge tube FDG1 and a second discharge tube FDG2.
第一放电管FDG1的第一端连接第二抑制电路20，第一放电管FDG1的第二端连接第二放电管FDG2的第一端，第二放电管FDG2的第二端连接地线。The first end of the first discharge tube FDG1 is connected to the second suppression circuit 20, the second end of the first discharge tube FDG1 is connected to the first end of the second discharge tube FDG2, and the second end of the second discharge tube FDG2 is connected to the ground.
可选的，该实施例中，该第一放电管FDG1为气体放电管。该第二放电管FDG2为固体放电管，如TVS管。Optionally, in this embodiment, the first discharge tube FDG1 is a gas discharge tube. The second discharge tube FDG2 is a solid discharge tube, such as a TVS tube.
如图2所示，均衡电路40包括：均衡电容CY2。该均衡电容CY2并联在第一放电管FDG1的两端。可选的，该均衡电容CY2为瓷片电容。As shown in FIG. 2, the equalization circuit 40 includes: an equalization capacitor CY2. The equalizing capacitor CY2 is connected in parallel at both ends of the first discharge tube FDG1. Optionally, the equalizing capacitor CY2 is a ceramic chip capacitor.
具体的，如图2所示，当交流电路遭遇雷击产生雷击信号时，该雷击信号为瞬间的电压和大电流。若该雷击信号为共模信号，则该共模信号进入第二压敏电阻MOV2和第三压敏电阻MOV3，由第二压敏电阻MOV2和第三压敏电阻MOV3分别将该共模信号抑制在各自的钳位电压，剩余的电压经第一放电管FDG1和第二放电管FDG2泄放到大地。其中，瓷片电容并联在第一放电管FDG1的两端使第一放电管FDG1的节电容与第二放电管FDG2的节电容相等，从而直到均衡第一放电管FDG1和第二放电管FDG2电压的作用，使第一放电管FDG1和第二放电管FDG2更加快速地将瞬间的浪涌电压绝大部分通过地线泄放到大地，使剩下的残压可以降至极低，输入到后级电路中的残压不足以使驱动电源损坏，可有效地保护驱动电源和LED灯。Specifically, as shown in FIG. 2, when the AC circuit encounters a lightning strike to generate a lightning strike signal, the lightning strike signal is an instantaneous voltage and large current. If the lightning strike signal is a common mode signal, the common mode signal enters the second varistor MOV2 and the third varistor MOV3, and the second varistor MOV2 and the third varistor MOV3 respectively suppress the common mode signal At the respective clamping voltage, the remaining voltage is discharged to the ground through the first discharge tube FDG1 and the second discharge tube FDG2. Among them, the ceramic capacitors are connected in parallel at both ends of the first discharge tube FDG1 to make the section capacitance of the first discharge tube FDG1 and the section capacitance of the second discharge tube FDG2 equal, so as to equalize the voltages of the first discharge tube FDG1 and the second discharge tube FDG2 The effect of the first discharge tube FDG1 and the second discharge tube FDG2 is to discharge most of the instantaneous surge voltage to the ground through the ground wire, so that the remaining residual voltage can be reduced to a very low level. The residual voltage in the level circuit is not enough to damage the drive power, which can effectively protect the drive power and LED lights.
这里需要说明的是，当正常工作时，第一压敏电阻MOV1、第二压敏电阻MOV2、第一放电管FDG1以及第二放电管FDG2是不导通时，该抑制雷击浪涌电路不工作，电网的电压经过保险管F1后直接给后级电路供电。只有当遭遇雷击时，该抑制雷击浪涌电路才工作，且可以抑制雷击浪涌的残压降至更低，降低雷击对驱动电源的损害，提升驱动电源的可靠性和安全性。另外，该抑制雷击浪涌电路结构简单、调试方便，体积小，成本低，可广泛应用于不同的电源领域。It should be noted here that when in normal operation, the first varistor MOV1, the second varistor MOV2, the first discharge tube FDG1 and the second discharge tube FDG2 are not conducting, the lightning surge suppression circuit does not work The voltage of the power grid directly supplies power to the subsequent circuit after passing through the fuse F1. The lightning surge suppression circuit works only when a lightning strike is encountered, and the residual voltage of the lightning strike surge can be suppressed to a lower level, reducing the damage to the drive power supply caused by the lightning strike, and improving the reliability and safety of the drive power supply. In addition, the lightning surge suppression circuit has a simple structure, convenient debugging, small size and low cost, and can be widely used in different power supply fields.
另外，本发明还提供了一种驱动电源，该驱动电源包括前述的抑制雷击浪涌电路。其中，该驱动电源包括但不限于LED驱动电源。In addition, the present invention also provides a driving power supply, which includes the aforementioned lightning surge suppression circuit. Wherein, the driving power includes but is not limited to LED driving power.
该驱动电源通过设置上述抑制雷击浪涌电路，当在户外使用时，可以有效抑制雷击浪涌保护驱动电源和LED灯；当在室内使用时，也可以有效抑制感应雷击瞬间的脉冲电压，最终有效的保护了室内的家用电器、电表等仪器设备，实用性非常强。The drive power supply is equipped with the above lightning surge suppression circuit. When used outdoors, it can effectively suppress the lightning surge protection and protect the drive power supply and LED lights. When used indoors, it can also effectively suppress the pulse voltage of the instant lightning strike, which is finally effective. It protects indoor household appliances, electric meters and other instruments and equipment, and is very practical.
以上实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据此实施，并不能限制本发明的保护范围。凡跟本发明权利要求范围所做的均等变化与修饰，均应属于本发明权利要求的涵盖范围。The above embodiments are only for explaining the technical concept and features of the present invention, and the purpose thereof is to enable those familiar with the technology to understand the contents of the present invention and implement them accordingly, and cannot limit the protection scope of the present invention. All changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.
应当理解的是，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本发明所附权利要求的保护范围。It should be understood that those of ordinary skill in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims (10)

  1. 一种抑制雷击浪涌电路，其特征在于，包括保险管、第一抑制电路、第二抑制电路、泄放电路以及均衡电路；A lightning surge suppression circuit is characterized by comprising a fuse, a first suppression circuit, a second suppression circuit, a bleeder circuit and an equalization circuit;
    所述保险管接入火线，所述第一抑制电路连接零线和所述火线，所述第二抑制电路连接所述火线和所述零线，所述泄放电路连接所述第二抑制电路和地线，所述均衡电路分别连接所述第二抑制电路和所述泄放电路；The fuse is connected to the live line, the first suppression circuit is connected to the neutral line and the live line, the second suppression circuit is connected to the live line and the neutral line, and the relief circuit is connected to the second suppression circuit And the ground wire, the equalization circuit is respectively connected to the second suppression circuit and the bleeder circuit;
    在交流电路遭遇雷击时，所述保险管和所述第一抑制电路将雷击产生的电压抑制在所述第一抑制电路的钳位电压；或者所述保险管、所述第二抑制电路、所述均衡电路、所述泄放电路将交流电路与地连接，将雷击产生的电压泄放到地。When the AC circuit encounters a lightning strike, the fuse and the first suppression circuit suppress the voltage generated by the lightning strike to the clamping voltage of the first suppression circuit; or the fuse, the second suppression circuit, and the The equalization circuit and the bleeder circuit connect the AC circuit to ground, and discharge the voltage generated by the lightning strike to the ground.
  2. 根据权利要求1所述的抑制雷击浪涌电路，其特征在于，所述第一抑制电路包括第一压敏电阻；The lightning surge suppression circuit according to claim 1, wherein the first suppression circuit includes a first varistor;
    所述第一压敏电阻的第一端连接所述火线，所述第一压敏电阻的第二端连接所述零线。The first end of the first varistor is connected to the live wire, and the second end of the first varistor is connected to the neutral wire.
  3. 根据权利要求1所述的抑制雷击浪涌电路，其特征在于，所述第二抑制电路包括：第二压敏电阻和第三压敏电阻；The lightning surge suppression circuit according to claim 1, wherein the second suppression circuit includes: a second varistor and a third varistor;
    所述第二压敏电阻的第一端连接所述零线，所述第二压敏电阻的第二端连接所述泄放电路；所述第三压敏电阻的第一端连接所述火线，所述第三压敏电阻的第二端连接所述第二压电阻的第二端。The first end of the second varistor is connected to the neutral line, the second end of the second varistor is connected to the bleeder circuit; the first end of the third varistor is connected to the live wire , The second end of the third varistor is connected to the second end of the second varistor.
  4. 根据权利要求1所述的抑制雷击浪涌电路，其特征在于，所述泄放电路包括：第一放电管和第二放电管；The lightning surge suppression circuit according to claim 1, wherein the discharge circuit includes: a first discharge tube and a second discharge tube;
    所述第一放电管的第一端连接所述第二抑制电路，所述第一放电管的第二端连接所述第二放电管的第一端，所述第二放电管的第二端连接所述地线。The first end of the first discharge tube is connected to the second suppression circuit, the second end of the first discharge tube is connected to the first end of the second discharge tube, and the second end of the second discharge tube Connect the ground wire.
  5. 根据权利要求4所述的抑制雷击浪涌电路，其特征在于，所述均衡电路包括：均衡电容；The lightning surge suppression circuit according to claim 4, wherein the equalization circuit includes: an equalization capacitor;
    所述均衡电容并联在所述第一放电管的两端。The equalizing capacitor is connected in parallel at both ends of the first discharge tube.
  6. 根据权利要求5所述的抑制雷击浪涌电路，其特征在于，所述电容为瓷片电容。The lightning surge suppression circuit according to claim 5, wherein the capacitor is a ceramic capacitor.
  7. 根据权利要求4所述的抑制雷击浪涌电路，其特征在于，所述第一放电管为气体放电管，所述第二放电管为固体放电管。The lightning surge suppression circuit according to claim 4, wherein the first discharge tube is a gas discharge tube, and the second discharge tube is a solid discharge tube.
  8. 根据权利要求2所述的抑制雷击浪涌电路，其特征在于，所述第一压敏电阻为氧化锌压敏电阻器、碳化硅压敏电阻器、金属氧化物压敏电阻器、锗（硅）压敏电阻器、钛酸钡压敏电阻器中的至少一种。The lightning surge suppression circuit according to claim 2, wherein the first varistor is a zinc oxide varistor, a silicon carbide varistor, a metal oxide varistor, and germanium (silicon ) At least one of varistor and barium titanate varistor.
  9. 根据权利要求3所述的抑制雷击浪涌电路，其特征在于，所述第二压敏电阻和所述第三压敏电阻为氧化锌压敏电阻器、碳化硅压敏电阻器、金属氧化物压敏电阻器、锗（硅）压敏电阻器、钛酸钡压敏电阻器中的至少一种。The lightning surge suppression circuit according to claim 3, wherein the second varistor and the third varistor are zinc oxide varistor, silicon carbide varistor, metal oxide At least one of a varistor, a germanium (silicon) varistor, and a barium titanate varistor.
  10. 一种驱动电源，其特征在于，包括权利要求1-9任一项所述的抑制雷击浪涌电路。A driving power supply, characterized by comprising a lightning surge suppression circuit according to any one of claims 1-9.
PCT/CN2019/080578 2018-10-08 2019-03-29 Lightning surge inhibiting circuit and drive power supply WO2020073621A1 (en)

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CN202616768U (en) * 2012-06-07 2012-12-19 厦门赛尔特电子有限公司 SPD (surge protection device) of LED (light emitting diode) illumination power supply
KR101253229B1 (en) * 2012-11-05 2013-04-16 김병학 Surge protect device for tvs/varistor short detection and communication
CN103986135A (en) * 2014-05-09 2014-08-13 广西南宁百兰斯科技开发有限公司 Lightning protection device for video monitoring
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