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WO2017128533A1 - Protection circuit for led light source, and led light source - Google Patents

Protection circuit for led light source, and led light source Download PDF

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Publication number
WO2017128533A1
WO2017128533A1 PCT/CN2016/079827 CN2016079827W WO2017128533A1 WO 2017128533 A1 WO2017128533 A1 WO 2017128533A1 CN 2016079827 W CN2016079827 W CN 2016079827W WO 2017128533 A1 WO2017128533 A1 WO 2017128533A1
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WIPO (PCT)
Prior art keywords
led light
light source
transformer
capacitor
protection circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/079827
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French (fr)
Chinese (zh)
Inventor
王海勇
黄冬青
章宗星
侯潇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen H&t Lighting Technology Co ltd
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Shenzhen H&t Lighting Technology Co ltd
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Publication of WO2017128533A1 publication Critical patent/WO2017128533A1/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the invention relates to the field of LED power sources, in particular to a protection circuit for an LED light source and an LED light source.
  • LED fluorescent lamp Light Emitting Diode, LED
  • LED fluorescent lamp can save more than 80% of electricity, and its life span is more than 10 times that of ordinary lamp. It has high safety, strong heat dissipation, low light decay, and resistance to attack. It is almost maintenance-free. There is no need to change the lamp and inductor ballast frequently. The problem of the device and the starter can be exchanged for the cost saved in about half a year. LED lamps will enter thousands of households, and replacing traditional fluorescent lamps will be an inevitable trend.
  • LED fluorescent lamps Due to the wide coverage of traditional fluorescent lamps, it has been accepted by the general public. As a new high-tech lighting product, LED fluorescent lamps, in order to achieve complete replacement, must be compatible with the standards of traditional fluorescent lamps. However, most of the current standards for LED fluorescent lamps on the market are based on the standards of traditional fluorescent lamps, including length, rated power, rated voltage, luminous flux, illumination, compatibility and connection methods.
  • the main object of the present invention is to provide a protection circuit for an LED light source and an LED light source, which are Solve technical problems when users misuse.
  • the present invention provides a protection circuit for an LED light source, comprising a transformer having first and second input ends, first and second output ends, wherein the first and second input ends are of the same name;
  • a bridge rectifier comprising first, second, fourth, and third rectifier diodes connected in series;
  • an anode of the first rectifier diode is connected to a cathode of the second rectifier diode and is connected to a first output end of the transformer, an anode of the third rectifier diode is connected to a cathode of the fourth rectifier diode, and the transformer is An output connection;
  • the first and third rectifier diode connection points are connected to the load first end, and the second and fourth rectifier diode connection points are connected to the load second end and grounded;
  • a fifth and sixth rectifier diodes are arranged in series between the first end and the second end of the load, and an anode of the fifth rectifier diode is connected to a cathode of the sixth rectifier diode;
  • the protection module includes a second capacitor and a third capacitor connected in series between the first and second output ends of the transformer, and a connection point of the first capacitor and the second capacitor and a fifth and sixth rectifier diodes are connected A first capacitor is disposed between the points;
  • connecting end is connected to a connection point of the first capacitor and the second capacitor, and the connecting end is connected to the first output end of the transformer via a first resistor.
  • a voltage stabilizing circuit is disposed between the first rectifier diode and the third rectifier diode connection point and the load first terminal.
  • the voltage stabilizing circuit includes a first inductor and a second resistor arranged in parallel.
  • the fuse is arranged in series on the connecting end.
  • a fuse is provided between the first input of the transformer and the transformer.
  • a resistor is disposed between the first first input and the first output of the transformer and between the second input and the second output of the transformer.
  • the first input and the second output of the transformer are short-circuited as a power supply input, and the connection serves as another power supply input.
  • the present invention also provides an LED light source comprising the protection circuit of the LED light source described above.
  • the protection circuit of the LED light source of the embodiment of the present invention by providing the protection module, the second capacitor and the third capacitor disposed between the first output end and the second output end of the transformer are When the user misconnects the operation, it will not cause harm to the human body and can effectively protect the safety of the user.
  • the protection circuit of the LED light source of the embodiment of the invention has the advantage of being able to effectively protect the safety of the user when the complex interface is operated.
  • the protection circuit of the LED light source and the LED light source of the embodiment of the invention have the advantages of high safety of use.
  • FIG. 1 is a schematic structural view of a protection circuit of an LED light source according to a preferred embodiment of the present invention.
  • FIG. 1 is a schematic structural view of a protection circuit of an LED light source according to a preferred embodiment of the present invention.
  • the protection circuit of the LED light source of the embodiment of the invention comprises a transformer 100, a bridge rectifier 200, a protection module 300 and a connection end 400.
  • the transformer 100 has a first input terminal 101, a second input terminal 102, a first output terminal 103, and a second output terminal 104.
  • the first input terminal 101 and the second input terminal 102 are the same name end.
  • the bridge rectifier rectifier 200 includes a first rectifier diode D1, a second rectifier diode D2, a fourth rectifier diode D4, and a third rectifier diode D3 connected in series;
  • the anode of the first rectifier diode D1 is connected to the cathode of the second rectifier diode D2 and is connected to the first output terminal 103 of the transformer 100.
  • the anode of the third rectifier diode D3 is the fourth
  • the cathode of the flow diode D4 is connected and the first output 103 of the transformer 100 is connected;
  • connection point of the first rectifier diode D1 and the third rectifier diode D3 is connected to the first end 501 of the load, and the connection point of the second rectifier diode D2 and the fourth rectifier diode D4 is connected to the second end 502 of the load and grounded;
  • a fifth rectifier diode D5 and a sixth rectifier diode D6 are connected in series between the first end 501 and the second end 502 of the load, and an anode of the fifth rectifier diode D5 is connected to a cathode of the sixth rectifier diode D6.
  • the protection module 300 includes a second capacitor C2 and a third capacitor C3 disposed in series between the first output end 103 and the second output end 104 of the transformer 100, and a connection point between the second capacitor C2 and the third capacitor C3.
  • a first capacitor C1 is disposed between the connection points of the fifth rectifier diode D5 and the sixth rectifier diode D6.
  • connection terminal A1 is connected to the connection point of the first capacitor C1 and the second capacitor C2, and the connection terminal A1 is connected to the first output terminal 103 of the transformer 100 via the first resistor R1.
  • a voltage stabilizing circuit 600 is disposed between the first rectifying diode D1 and the third rectifying diode D3 connection point and the load first end 501.
  • the voltage stabilizing circuit 600 includes a first inductor L1 and a second resistor R2 disposed in parallel.
  • a fuse F is arranged in series on the connection terminal A1.
  • a fuse F is disposed between the first input terminal 101 of the transformer 100 and the transformer 100.
  • a resistor is disposed between the first input terminal 101 and the first output terminal 103 of the transformer 100 and between the second input terminal 102 and the second output terminal 104 of the transformer 100.
  • first input terminal 101 and the second output terminal 104 of the transformer 100 are short-circuited as a power supply input terminal, and the connection terminal serves as another power supply input terminal.
  • the positive half wave of the current supplied from the first input flows through the fuse F into the first rectifier diode D1 of the bridge rectifier 200, and then flows through the first inductor L1 to the ground of the rear stage load, and then passes through the fourth whole of the bridge rectifier 200.
  • the flow diode D4 returns to the second input 102 that is connected to the power supply to form a closed loop.
  • the negative half wave passes through the third rectifier diode D3 of the bridge rectifier 200 and the second rectifier diode D2 to achieve full-wave rectification.
  • connection terminal A1 When the 220V AC is replaced, the connection terminal A1 can be set as two terminals, which seems to be a charged network, but the second capacitor C2, the third capacitor C3, the second capacitor C2, and the third capacitor C3 can be set to 1nF.
  • the capacitance when the human body contacts the ground current formed by less than 100uA, will not cause harm to the human body.
  • the F2 When the user inserts the single end of the connector A1 into the power interface under the misoperation, the F2 will be immediately blown to realize the input disconnection protection. After the second capacitor C2 and the third capacitor C3 are both 1nF capacitors, the human body will not be caused. Electric shock hazard.
  • the current positive half wave flows from the first input terminal 101 and the second input terminal 102 into the bridge rectifier respectively.
  • the first rectifier diode D1 and the third rectifier diode D3 of 200 are rectified and merged, and then flow to the rear stage load through the first inductor L1, and then pass through the sixth rectifier diode D6, because the input frequency of the electronic ballast is about 50 kHz, the high frequency
  • the current is coupled to the return connection terminal A1 through the first capacitor C1 to form a loop.
  • the negative current half-wave is rectified to form a loop through the fifth rectifier diode D5 and the second rectifier diode D2 and the fourth rectifier diode D4 of the bridge rectifier 200.
  • the present invention also provides an LED light source including a protection circuit for the LED light source described above.
  • the protection circuit of the LED light source of the embodiment of the present invention by providing the protection module 300, the second capacitor C2 disposed between the first output end 103 and the second output end 104 of the transformer 100 is provided.
  • the third capacitor C3 does not cause harm to the human body when the user misconnects, and can effectively protect the safety of the user.
  • the protection circuit of the LED light source of the embodiment of the invention has the advantage of being able to effectively protect the safety of the user when the complex interface is operated.
  • the protection circuit of the LED light source and the LED light source of the embodiment of the invention have the advantages of high safety of use.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

Disclosed is a protection circuit for an LED light source, comprising a transformer; a protection module comprises a second capacitor and third capacitor arranged in series between the first and second output terminals of said transformer; a first capacitor is arranged between the connection point of said first capacitor and second capacitor and the connection point of fifth and sixth rectifying diodes; a connection terminal, said connection terminal being connected to the connection point of the first capacitor and the second capacitor, and the connection terminal is connected to the first output terminal of the transformer via a first resistor. The LED light-source protection circuit and the LED light source of the embodiments of the present invention have the advantage of being very safe to use.

Description

一种LED光源的保护电路及LED光源Protection circuit of LED light source and LED light source 技术领域Technical field

本发明涉及LED电源领域，尤其涉及一种LED光源的保护电路及LED光源。The invention relates to the field of LED power sources, in particular to a protection circuit for an LED light source and an LED light source.

背景技术Background technique

当前绿色能源，节能环保，低碳生活是当今时代人们谈论最多的话题。这是对科学技术发展的实际检验，同时也反映了人们对新生活更高品质的要求。当太阳能、风能都被作为绿色能源推广的时候，LED(Light Emitting Diode,LED)产品也以节能环保新能源跻身于广大市场。其中占主导的还是LED日光灯。LED日光灯节电高达80％以上，寿命为普通灯管的10倍以上，安全度高，散热性强，光衰低，耐抗击，几乎是免维护，不存在要经常更换灯管、电感镇流器、启辉器的问题，约半年下来节省的费用就可以换回成本。LED灯管走进千家万户，替换传统荧光灯将是一种必然趋势。The current green energy, energy saving and environmental protection, low carbon life is the topic that people talk about most in the modern era. This is a practical test of the development of science and technology, but also reflects people's requirements for higher quality in new life. When solar energy and wind energy are promoted as green energy, LED (Light Emitting Diode, LED) products are also among the vast markets with energy-saving and environmentally-friendly new energy sources. The dominant one is the LED fluorescent lamp. LED fluorescent lamp can save more than 80% of electricity, and its life span is more than 10 times that of ordinary lamp. It has high safety, strong heat dissipation, low light decay, and resistance to attack. It is almost maintenance-free. There is no need to change the lamp and inductor ballast frequently. The problem of the device and the starter can be exchanged for the cost saved in about half a year. LED lamps will enter thousands of households, and replacing traditional fluorescent lamps will be an inevitable trend.

由于传统的荧光灯覆盖面广，已被广大民众所接受。LED日光灯作为新型高科技照明产品想要实现完全替换，就必须得兼容传统荧光灯的相关标准。然而目前市面上的LED日光灯的标准大多都是参照传统荧光灯的标准来做，包括长度，额定功率，额定电压，光通量，照度，兼容性及连接方式等等。Due to the wide coverage of traditional fluorescent lamps, it has been accepted by the general public. As a new high-tech lighting product, LED fluorescent lamps, in order to achieve complete replacement, must be compatible with the standards of traditional fluorescent lamps. However, most of the current standards for LED fluorescent lamps on the market are based on the standards of traditional fluorescent lamps, including length, rated power, rated voltage, luminous flux, illumination, compatibility and connection methods.

现有的产品大多未通过安规认证而流入市场，必定会给客户带来安全隐患。Most of the existing products have not passed the safety certification and entered the market, which will definitely bring safety hazards to customers.

如何设计出一种方便接入传统电源接口且使用安全的LED光源的保护电路及LED光源为业界亟需解决的课题。How to design a protection circuit and LED light source that are convenient for accessing a conventional power supply interface and using a safe LED light source is an urgent problem to be solved in the industry.

发明内容Summary of the invention

本发明的主要目的在于提供一种LED光源的保护电路及LED光源，旨在 解决用户误操作时安全性的技术问题。The main object of the present invention is to provide a protection circuit for an LED light source and an LED light source, which are Solve technical problems when users misuse.

为实现上述目的，本发明提供一种LED光源的保护电路其包括变压器，具有第一、第二输入端、第一、第二输出端，所述第一、第二输入端为同名端；In order to achieve the above object, the present invention provides a protection circuit for an LED light source, comprising a transformer having first and second input ends, first and second output ends, wherein the first and second input ends are of the same name;

桥堆整流器，包括依次串连的第一、第二、第四、第三整流二极管；a bridge rectifier, comprising first, second, fourth, and third rectifier diodes connected in series;

其中，第一整流二极管的阳极与第二整流二极管的阴极连接并与所述变压器的第一输出端连接，所述第三整流二极管的阳极与第四整流二极管的阴极连接并且所述变压器的第一输出端连接；Wherein an anode of the first rectifier diode is connected to a cathode of the second rectifier diode and is connected to a first output end of the transformer, an anode of the third rectifier diode is connected to a cathode of the fourth rectifier diode, and the transformer is An output connection;

所述第一、第三整流二极管连接点与负载第一端连接，所述第二、第四整流二极管连接点与负载第二端连接且接地；The first and third rectifier diode connection points are connected to the load first end, and the second and fourth rectifier diode connection points are connected to the load second end and grounded;

所述负载第一端、第二端之间串连设置有第五、第六整流二极管，所述第五整流二极管的阳极与第六整流直极管的阴极连接；a fifth and sixth rectifier diodes are arranged in series between the first end and the second end of the load, and an anode of the fifth rectifier diode is connected to a cathode of the sixth rectifier diode;

保护模块，包括串连设置在所述变压器第一、第二输出端之间的第二电容、第三电容，所述第一电容与第二电容的连接点和第五、第六整流二极管连接点之间设置有第一电容；The protection module includes a second capacitor and a third capacitor connected in series between the first and second output ends of the transformer, and a connection point of the first capacitor and the second capacitor and a fifth and sixth rectifier diodes are connected A first capacitor is disposed between the points;

连接端，所述连接端与所述所述第一电容与第二电容的连接点连接，且所述连接端经过第一电阻与所述变压器的第一输出端连接。a connecting end, wherein the connecting end is connected to a connection point of the first capacitor and the second capacitor, and the connecting end is connected to the first output end of the transformer via a first resistor.

优选地，所述第一整流二极管与第三整流二极管连接点与负载第一端之间设置稳压电路。Preferably, a voltage stabilizing circuit is disposed between the first rectifier diode and the third rectifier diode connection point and the load first terminal.

优选地，所述稳压电路包括并联设置的第一电感和第二电阻。Preferably, the voltage stabilizing circuit includes a first inductor and a second resistor arranged in parallel.

优选地，所述连接端上串连设置的保险丝。Preferably, the fuse is arranged in series on the connecting end.

优选地，所述变压器的第一输入端与变压器之间设置保险丝。Preferably, a fuse is provided between the first input of the transformer and the transformer.

优选地，所述变压器的第一第一输入端和第一输出端之间，以及所述变压器的第二输入端和第二输出端之间均设置有电阻。Preferably, a resistor is disposed between the first first input and the first output of the transformer and between the second input and the second output of the transformer.

优选地，所述变压器的第一输入端和第二输出端短接作为一供电输入端，所述连接端作为另一供电输入端。 Preferably, the first input and the second output of the transformer are short-circuited as a power supply input, and the connection serves as another power supply input.

本发明还提供一种LED光源，其包括上述的LED光源的保护电路。The present invention also provides an LED light source comprising the protection circuit of the LED light source described above.

相较于现有技术，本发明实施例的LED光源的保护电路中，通过设置保护模块，通过设置在变压器的第一输出端、第二输出端之间的第二电容、第三电容，在用户误接操作时不会对人体产生危害，能有效的保护用户的安全。本发明实施例的LED光源的保护电路具有在复杂接口操作时能够有效的保护用户的安全的优点。Compared with the prior art, in the protection circuit of the LED light source of the embodiment of the present invention, by providing the protection module, the second capacitor and the third capacitor disposed between the first output end and the second output end of the transformer are When the user misconnects the operation, it will not cause harm to the human body and can effectively protect the safety of the user. The protection circuit of the LED light source of the embodiment of the invention has the advantage of being able to effectively protect the safety of the user when the complex interface is operated.

因此，本发明实施例的LED光源的保护电路及LED光源具有使用安全性高的优点。Therefore, the protection circuit of the LED light source and the LED light source of the embodiment of the invention have the advantages of high safety of use.

附图说明DRAWINGS

图1是本发明一优先实施例的LED光源的保护电路的结构示意图。1 is a schematic structural view of a protection circuit of an LED light source according to a preferred embodiment of the present invention.

本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

具体实施方式detailed description

应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

参照图1，图1是本发明一优先实施例的LED光源的保护电路的结构示意图。Referring to FIG. 1, FIG. 1 is a schematic structural view of a protection circuit of an LED light source according to a preferred embodiment of the present invention.

本发明实施例的LED光源的保护电路包括变压器100、桥堆整流器200、保护模块300和连接端400。The protection circuit of the LED light source of the embodiment of the invention comprises a transformer 100, a bridge rectifier 200, a protection module 300 and a connection end 400.

变压器100具有第一输入端101、第二输入端102、第一输出端103、第二输出端104，所述第一输入端101、第二输入端102为同名端。The transformer 100 has a first input terminal 101, a second input terminal 102, a first output terminal 103, and a second output terminal 104. The first input terminal 101 and the second input terminal 102 are the same name end.

桥堆整流器200包括依次串连的第一整流二极管D1、第二整流二极管D2、第四整流二极管D4、第三整流二极管D3；The bridge rectifier rectifier 200 includes a first rectifier diode D1, a second rectifier diode D2, a fourth rectifier diode D4, and a third rectifier diode D3 connected in series;

其中，第一整流二极管D1的阳极与第二整流二极管D2的阴极连接并与变压器100的第一输出端103连接，所述第三整流二极管D3的阳极与第四整 流二极管D4的阴极连接并且变压器100的第一输出端103连接；The anode of the first rectifier diode D1 is connected to the cathode of the second rectifier diode D2 and is connected to the first output terminal 103 of the transformer 100. The anode of the third rectifier diode D3 is the fourth The cathode of the flow diode D4 is connected and the first output 103 of the transformer 100 is connected;

所述第一整流二极管D1、第三整流二极管D3连接点与负载第一端501连接，所述第二整流二极管D2、第四整流二极管D4连接点与负载第二端502连接且接地；The connection point of the first rectifier diode D1 and the third rectifier diode D3 is connected to the first end 501 of the load, and the connection point of the second rectifier diode D2 and the fourth rectifier diode D4 is connected to the second end 502 of the load and grounded;

所述负载第一端501、第二端502之间串连设置有第五整流二极管D5、第六整流二极管D6，所述第五整流二极管D5的阳极与第六整流二极管D6的阴极连接。A fifth rectifier diode D5 and a sixth rectifier diode D6 are connected in series between the first end 501 and the second end 502 of the load, and an anode of the fifth rectifier diode D5 is connected to a cathode of the sixth rectifier diode D6.

保护模块300包括串连设置在变压器100的第一输出端103、第二输出端104之间的第二电容C2、第三电容C3，所述第二电容C2与第三电容C3的连接点和第五整流二极管D5、第六整流二极管D6连接点之间设置有第一电容C1。The protection module 300 includes a second capacitor C2 and a third capacitor C3 disposed in series between the first output end 103 and the second output end 104 of the transformer 100, and a connection point between the second capacitor C2 and the third capacitor C3. A first capacitor C1 is disposed between the connection points of the fifth rectifier diode D5 and the sixth rectifier diode D6.

连接端A1与第一电容C1与第二电容C2的连接点连接，且连接端A1经过第一电阻R1与变压器100的第一输出端103连接。The connection terminal A1 is connected to the connection point of the first capacitor C1 and the second capacitor C2, and the connection terminal A1 is connected to the first output terminal 103 of the transformer 100 via the first resistor R1.

进一步的，第一整流二极管D1与第三整流二极管D3连接点与负载第一端501之间设置稳压电路600。Further, a voltage stabilizing circuit 600 is disposed between the first rectifying diode D1 and the third rectifying diode D3 connection point and the load first end 501.

进一步的，稳压电路600包括并联设置的第一电感L1和第二电阻R2。Further, the voltage stabilizing circuit 600 includes a first inductor L1 and a second resistor R2 disposed in parallel.

进一步的，连接端A1上串连设置有保险丝F。Further, a fuse F is arranged in series on the connection terminal A1.

进一步的，变压器100的第一输入端101与变压器100之间设置保险丝F。Further, a fuse F is disposed between the first input terminal 101 of the transformer 100 and the transformer 100.

进一步的，变压器100的第一输入端101和第一输出端103之间，以及所述变压器100的第二输入端102和第二输出端104之间均设置有电阻。Further, a resistor is disposed between the first input terminal 101 and the first output terminal 103 of the transformer 100 and between the second input terminal 102 and the second output terminal 104 of the transformer 100.

进一步的，变压器100的第一输入端101和第二输出端104短接作为一供电输入端，所述连接端作为另一供电输入端。Further, the first input terminal 101 and the second output terminal 104 of the transformer 100 are short-circuited as a power supply input terminal, and the connection terminal serves as another power supply input terminal.

本发明实施例的LED光源的保护电路，在日常使用过程中，当将变压器的第一输入端101、第二输入端102并接作为一路供电输入时，供电的电流正半波从第一输入端101流经保险丝F进入桥堆整流器200的第一整流二极管D1，后通过第一电感L1流向后级负载接地,再通过桥堆整流器200的第四整 流二极管D4返回到连接电源的第二输入端102形成闭合回路。负半波则通过桥堆整流器200的第三整流二极管D3与第二整流二极管D2从而实现全波整流。在220V的交流代电时，连接端A1可以设置为两个接线端子，看似是带电网络，但经过第二电容C2、第三电容C3，第二电容C2、第三电容C3可以设置为1nF的电容，当人体接触形成的对地电流小于100uA,不会对人体造成危害。当用户在误操作情况下将连接端A1单端插入电源接口时,F2会立即熔断，实现输入断路保护，同样经过第二电容C2、第三电容C3两1nF电容后，也不会对人体造成触电危害。In the protection circuit of the LED light source of the embodiment of the present invention, when the first input end 101 and the second input end 102 of the transformer are connected in parallel as a power supply input in daily use, the positive half wave of the current supplied from the first input The terminal 101 flows through the fuse F into the first rectifier diode D1 of the bridge rectifier 200, and then flows through the first inductor L1 to the ground of the rear stage load, and then passes through the fourth whole of the bridge rectifier 200. The flow diode D4 returns to the second input 102 that is connected to the power supply to form a closed loop. The negative half wave passes through the third rectifier diode D3 of the bridge rectifier 200 and the second rectifier diode D2 to achieve full-wave rectification. When the 220V AC is replaced, the connection terminal A1 can be set as two terminals, which seems to be a charged network, but the second capacitor C2, the third capacitor C3, the second capacitor C2, and the third capacitor C3 can be set to 1nF. The capacitance, when the human body contacts the ground current formed by less than 100uA, will not cause harm to the human body. When the user inserts the single end of the connector A1 into the power interface under the misoperation, the F2 will be immediately blown to realize the input disconnection protection. After the second capacitor C2 and the third capacitor C3 are both 1nF capacitors, the human body will not be caused. Electric shock hazard.

另外，在连接电子整流器时，当第一输入端101、第二输入端102分别短路时，电流正半波从第一输入端101与第二输入端102分两路流分别流经桥堆整流器200的第一整流二极管D1和第三整流二极管D3整流汇合，后通过第一电感L1流向后级负载后接地,再通过第六整流二极管D6，因为电子镇流器输入频率约为50KHz，高频电流通过第一电容C1耦合到返回连接端A1形成回路。电流负半波则通过第五整流二极管D5及桥堆整流器200的第二整流二极管D2、第四整流二极管D4实现整流形成回路。In addition, when the first input terminal 101 and the second input terminal 102 are respectively short-circuited when the electronic rectifier is connected, the current positive half wave flows from the first input terminal 101 and the second input terminal 102 into the bridge rectifier respectively. The first rectifier diode D1 and the third rectifier diode D3 of 200 are rectified and merged, and then flow to the rear stage load through the first inductor L1, and then pass through the sixth rectifier diode D6, because the input frequency of the electronic ballast is about 50 kHz, the high frequency The current is coupled to the return connection terminal A1 through the first capacitor C1 to form a loop. The negative current half-wave is rectified to form a loop through the fifth rectifier diode D5 and the second rectifier diode D2 and the fourth rectifier diode D4 of the bridge rectifier 200.

本发明还提供一种包括有上述LED光源的保护电路的LED光源。The present invention also provides an LED light source including a protection circuit for the LED light source described above.

相较于现有技术，本发明实施例的LED光源的保护电路中，通过设置保护模块300，通过设置在变压器100的第一输出端103、第二输出端104之间的第二电容C2、第三电容C3，在用户误接操作时不会对人体产生危害，能有效的保护用户的安全。本发明实施例的LED光源的保护电路具有在复杂接口操作时能够有效的保护用户的安全的优点。Compared with the prior art, in the protection circuit of the LED light source of the embodiment of the present invention, by providing the protection module 300, the second capacitor C2 disposed between the first output end 103 and the second output end 104 of the transformer 100 is provided. The third capacitor C3 does not cause harm to the human body when the user misconnects, and can effectively protect the safety of the user. The protection circuit of the LED light source of the embodiment of the invention has the advantage of being able to effectively protect the safety of the user when the complex interface is operated.

因此，本发明实施例的LED光源的保护电路及LED光源具有使用安全性高的优点。Therefore, the protection circuit of the LED light source and the LED light source of the embodiment of the invention have the advantages of high safety of use.

以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。 The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims (8)

一种LED光源的保护电路，其特征在于，其包括：变压器，具有第一、第二输入端、第一、第二输出端，所述第一、第二输入端为同名端；A protection circuit for an LED light source, comprising: a transformer having first and second input ends, first and second output ends, wherein the first and second input ends are the same name end; 桥堆整流器，包括依次串连的第一、第二、第四、第三整流二极管；a bridge rectifier, comprising first, second, fourth, and third rectifier diodes connected in series; 其中，第一整流二极管的阳极与第二整流二极管的阴极连接并与所述变压器的第一输出端连接，所述第三整流二极管的阳极与第四整流二极管的阴极连接并且所述变压器的第一输出端连接；Wherein an anode of the first rectifier diode is connected to a cathode of the second rectifier diode and is connected to a first output end of the transformer, an anode of the third rectifier diode is connected to a cathode of the fourth rectifier diode, and the transformer is An output connection; 所述第一、第三整流二极管连接点与负载第一端连接，所述第二、第四整流二极管连接点与负载第二端连接且接地；The first and third rectifier diode connection points are connected to the load first end, and the second and fourth rectifier diode connection points are connected to the load second end and grounded; 所述负载第一端、第二端之间串连设置有第五、第六整流二极管，所述第五整流二极管的阳极与第六整流直极管的阴极连接；a fifth and sixth rectifier diodes are arranged in series between the first end and the second end of the load, and an anode of the fifth rectifier diode is connected to a cathode of the sixth rectifier diode; 保护模块，包括串连设置在所述变压器第一、第二输出端之间的第二电容、第三电容，所述第一电容与第二电容的连接点和第五、第六整流二极管连接点之间设置有第一电容；The protection module includes a second capacitor and a third capacitor connected in series between the first and second output ends of the transformer, and a connection point of the first capacitor and the second capacitor and a fifth and sixth rectifier diodes are connected A first capacitor is disposed between the points; 连接端，所述连接端与所述所述第一电容与第二电容的连接点连接，且所述连接端经过第一电阻与所述变压器的第一输出端连接。a connecting end, wherein the connecting end is connected to a connection point of the first capacitor and the second capacitor, and the connecting end is connected to the first output end of the transformer via a first resistor. 根据权利要求1所述的LED光源的保护电路，其特征在于，所述第一整流二极管与第三整流二极管连接点与负载第一端之间设置稳压电路。The protection circuit for an LED light source according to claim 1, wherein a voltage stabilizing circuit is disposed between the first rectifying diode and the third rectifying diode connection point and the load first end. 根据权利要求1所述的LED光源的保护电路，其特征在于，所述稳压电路包括并联设置的第一电感和第二电阻。The protection circuit for an LED light source according to claim 1, wherein the voltage stabilizing circuit comprises a first inductor and a second resistor arranged in parallel. 根据权利要求1所述的LED光源的保护电路，其特征在于，所述连接端上串连设置的保险丝。The protection circuit for an LED light source according to claim 1, wherein a fuse is disposed in series with the connection end. 根据权利要求1所述的LED光源的保护电路，其特征在于，所述变压器的第一输入端与变压器之间设置保险丝。The protection circuit for an LED light source according to claim 1, wherein a fuse is disposed between the first input end of the transformer and the transformer. 根据权利要求1所述的LED光源的保护电路，其特征在于，所述变压 器的第一第一输入端和第一输出端之间，以及所述变压器的第二输入端和第二输出端之间均设置有电阻。A protection circuit for an LED light source according to claim 1, wherein said voltage transformation A resistor is disposed between the first first input and the first output of the transformer and between the second input and the second output of the transformer. 根据权利要求1所述的LED光源的保护电路，其特征在于，所述变压器的第一输入端和第二输出端短接作为一供电输入端，所述连接端作为另一供电输入端。The protection circuit for an LED light source according to claim 1, wherein the first input end and the second output end of the transformer are short-circuited as a power supply input end, and the connection end serves as another power supply input end. 一种LED光源，其特征在于，其包括权利要求1至7任一项所述的LED光源的保护电路。 An LED light source comprising the protection circuit of the LED light source according to any one of claims 1 to 7.
PCT/CN2016/079827 2016-01-29 2016-04-21 Protection circuit for led light source, and led light source Ceased WO2017128533A1 (en)

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