WO2016041123A1 - 一种led应急灯电源的开路检测电路 - Google Patents

一种led应急灯电源的开路检测电路 Download PDF

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WO2016041123A1
WO2016041123A1 PCT/CN2014/086516 CN2014086516W WO2016041123A1 WO 2016041123 A1 WO2016041123 A1 WO 2016041123A1 CN 2014086516 W CN2014086516 W CN 2014086516W WO 2016041123 A1 WO2016041123 A1 WO 2016041123A1
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resistor
diode
power supply
led
emergency
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PCT/CN2014/086516
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English (en)
French (fr)
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许国伟
黄鹤鸣
肖灵
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深圳市聚作照明股份有限公司
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Priority to PCT/CN2014/086516 priority Critical patent/WO2016041123A1/zh
Publication of WO2016041123A1 publication Critical patent/WO2016041123A1/zh

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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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity

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  • the invention relates to an open circuit detecting circuit, in particular to an open circuit detecting circuit for an LED emergency light power supply.
  • LED lighting products have entered the mature application stage. At present, commercial lighting is used at the front end. There are many types of commercial lighting fixtures, and there must be a certain proportion of power-off emergency lighting fixtures.
  • the traditional fluorescent lamp emergency system is often used, which does not match the LED illumination.
  • Some of the LED lamps directly replace the emergency lamp fluorescent tube, but the efficiency is low and the cost is high.
  • Due to the fire protection certification GB_17945-2010 update fire luminaires are required to have open circuit detection in the emergency state. Therefore, designing a low-cost open circuit detection circuit for LED emergency light power supply is an urgent problem to be solved in the field.
  • the present invention provides an open circuit detection circuit for a low cost LED emergency light power supply.
  • the invention provides an open circuit detection circuit for an LED emergency light power supply, comprising an emergency power supply line, a diode D1, a diode D2, an LED lamp, a resistor R1, an optocoupler OP1A, a detection line, a triode Q13, a resistor R2, a resistor R3 and a resistor R4.
  • the anode of the emergency power supply line is connected to the anode of the diode D1
  • the cathode of the diode D1 is connected to the anode of the diode D2
  • the cathode of the diode D2 is connected to the anode of the LED lamp.
  • the cathode of the LED lamp is respectively connected to one end of the resistor R2 and one end of the resistor R4, the other end of the resistor R4 is connected to the base of the transistor Q13, the collector of the transistor Q13 and the optocoupler OP1A
  • the pin 2 is connected, the emitter of the transistor Q13 is connected to the negative pole of the emergency power line, the other end of the resistor R2 is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the emergency a cathode of the power line is connected, a cathode of the diode is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to a pin 1 of the optocoupler OP1A, and C, E of the optocoupler OP1A Are respectively connected to the detection circuit.
  • the open circuit detecting circuit further includes a capacitor C12, The cathode of the diode is connected to one end of the capacitor C12, and the other end of the capacitor C12 is connected to the cathode of the emergency power line.
  • the capacitor C12 is a filter capacitor.
  • the emergency power supply line is provided with a power supply current feedback pin CS, and the power supply current feedback pin CS is connected between the resistor R2 and the resistor R3.
  • the diode D1 is a rectifier diode.
  • the beneficial effects of the present invention are: through the above scheme, in the on state, the transistor Q13 is turned on, the C and E poles of the optocoupler OP1A are turned on, and the power-on detection is completed through the detecting line, and in the open state, the transistor Q13 is turned off, then the light is turned off.
  • the C and E poles of the OP1A are turned off, and the detection line can not detect the signal, so that it can be judged as an open circuit, and the open circuit detection of the LED emergency light power source is realized, and the cost is low.
  • Figure 1 is a circuit diagram showing an open circuit detection of an LED emergency light source of the present invention.
  • Fig. 1 The reference numerals in Fig. 1 are: emergency power supply line 101; LED light fixture 102; detection line 103.
  • an open circuit detection circuit for an LED emergency light power supply includes an emergency power supply line 101 , a diode D1 , a diode D2 , an LED lamp 102 , a resistor R1 , an optocoupler OP1A , a detection line 103 , a transistor Q13 , and a resistor R2 .
  • a resistor R3 and a resistor R4 wherein a positive pole of the emergency power supply line 101 is connected to a positive pole of the diode D1, a cathode of the diode D1 is connected to a positive pole of the diode D2, and a cathode of the diode D2 is connected to the LED
  • the anode of the lamp 102 is connected to the anode of the LED lamp 102, and the other end of the resistor R4 is connected to the base of the transistor Q13.
  • the transistor Q13 is connected to the anode of the transistor R13.
  • the collector is connected to the pin 2 of the optocoupler OP1A, the emitter of the transistor Q13 is connected to the cathode of the emergency power line 101, and the other end of the resistor R2 is connected to one end of the resistor R3.
  • the other end of the resistor R3 is connected to the cathode of the emergency power supply line 101, the cathode of the diode is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the pin 1 of the optocoupler OP1A.
  • the optocoupler OP1A C, E respectively connected to the detection circuit 103.
  • the open circuit detection circuit further includes a capacitor C12 , a cathode of the diode is connected to one end of the capacitor C12 , and the other end of the capacitor C12 is connected to a cathode of the emergency power line 101 .
  • the capacitor C12 is a filter capacitor.
  • the emergency power supply line 101 is provided with a power supply current feedback pin CS, and the power supply current feedback pin CS is connected between the resistor R2 and the resistor R3.
  • the diode D1 is a rectifier diode.
  • the output current is rectified by the diode D1, filtered by the capacitor C12, and then applied to the positive pole of the LED lamp 102 via the diode D2.
  • the current is then passed through the negative pole of the LED lamp 102, and then through the resistor R2 and the resistor R3.
  • the negative pole of the emergency power supply line 101 the current forms a voltage on the resistor R2 and the resistor R3, and the upper voltage of the resistor R2 is connected to the power supply current feedback pin CS to control the output current of the emergency power supply line 101, and the voltage on the resistor R3 and the resistor R2 is
  • the resistor R4 is connected to the base of the transistor Q13, the transistor Q13 is turned on, the optocoupler OP1A and the resistor R1 are energized, the C and E poles of the optocoupler OP1A are turned on, and the signal is sent to the detection line 103 to complete the energization detection;
  • the open circuit detection circuit of the LED emergency light power supply provided by the invention can better solve the open source detection and short circuit detection of the LED special emergency power supply system, and the cost is low.

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

Abstract

一种LED应急灯电源的开路检测电路，包括应急电源线路、二极管D1、二极管D2、LED灯具、电阻R1、光耦OP1A、检测线路、三极管Q13、电阻R2、电阻R3和电阻R4，其中，所述应急电源线路的正极与所述二极管D1的正极连接，所述二极管D1的负极与所述二极管D2的正极连接，所述二极管D2的负极与所述LED灯具的正极连接，所述LED灯具的负极分别与所述电阻R2的一端、电阻R4的一端连接，所述电阻R4的另一端与所述三极管Q13的基极连接，所述三极管Q13的集电极与所述光耦OP1A的引脚2连接。

Description

一种LED应急灯电源的开路检测电路 技术领域
本发明涉及开路检测电路，尤其涉及一种LED应急灯电源的开路检测电路。
背景技术
LED照明产品目前已进入成熟应用阶段，目前走在前端的是商业照明，商业照明灯具种类较多，而且必须有一定比例的断电应急照明灯具。
目前多采用传统荧光灯应急系统，与LED照明不匹配，部分采用LED灯具直接替换应急灯荧光灯管，但效率较低，成本较高。由于消防认证GB_17945-2010更新，要求消防灯具在应急状态必须有开路检测，因此，如果设计一种成本低、用于LED应急灯电源的开路检测电路是本领域亟待解决的问题。
发明内容
为了解决现有技术中的问题，本发明提供了一种成本低的LED应急灯电源的开路检测电路。
本发明提供了一种LED应急灯电源的开路检测电路，包括应急电源线路、二极管D1、二极管D2、LED灯具、电阻R1、光耦OP1A、检测线路、三极管Q13、电阻R2、电阻R3和电阻R4，其中，所述应急电源线路的正极与所述二极管D1的正极连接，所述二极管D1的负极与所述二极管D2的正极连接，所述二极管D2的负极与所述LED灯具的正极连接，所述LED灯具的负极分别与所述电阻R2的一端、电阻R4的一端连接，所述电阻R4的另一端与所述三极管Q13的基极连接，所述三极管Q13的集电极与所述光耦OP1A的引脚2连接，所述三极管Q13的发射极与所述应急电源线路的负极连接，所述电阻R2的另一端与所述电阻R3的一端连接，所述电阻R3的另一端与所述应急电源线路的负极连接，所述二极管的负极与所述电阻R1的一端连接，所述电阻R1的另一端与所述光耦OP1A的引脚1连接，所述光耦OP1A的C、E极分别与所述检测线路连接。
作为本发明的进一步改进，所述开路检测电路还包括电容C12， 所述二极管的负极与所述电容C12的一端连接，所述电容C12的另一端与所述应急电源线路的负极连接。
作为本发明的进一步改进，所述电容C12为滤波电容。
作为本发明的进一步改进，所述应急电源线路设有电源电流反馈脚CS，所述电源电流反馈脚CS连接于所述电阻R2、电阻R3之间。
作为本发明的进一步改进，所述二极管D1为整流二极管。
本发明的有益效果是：通过上述方案，导通状态下，三极管Q13导通，光耦OP1A的C、E极导通，通过检测线路完成通电检测，开路状态下，三极管Q13关断，则光耦OP1A的C、E极关断，检测线路检测不到信号，从而可判断为开路，实现了LED应急灯电源的开路检测，成本较低。
附图说明
图1是本发明一种LED应急灯电源的开路检测电路图。
具体实施方式
下面结合附图说明及具体实施方式对本发明进一步说明。
图1中的附图标号为：应急电源线路101；LED灯具102；检测线路103。
如图1所示，一种LED应急灯电源的开路检测电路，包括应急电源线路101、二极管D1、二极管D2、LED灯具102、电阻R1、光耦OP1A、检测线路103、三极管Q13、电阻R2、电阻R3和电阻R4，其中，所述应急电源线路101的正极与所述二极管D1的正极连接，所述二极管D1的负极与所述二极管D2的正极连接，所述二极管D2的负极与所述LED灯具102的正极连接，所述LED灯具102的负极分别与所述电阻R2的一端、电阻R4的一端连接，所述电阻R4的另一端与所述三极管Q13的基极连接，所述三极管Q13的集电极与所述光耦OP1A的引脚2连接，所述三极管Q13的发射极与所述应急电源线路101的负极连接，所述电阻R2的另一端与所述电阻R3的一端连接，所述电阻R3的另一端与所述应急电源线路101的负极连接，所述二极管的负极与所述电阻R1的一端连接，所述电阻R1的另一端与所述光耦OP1A的引脚1连接，所述光耦OP1A的C、E极分别与所述检测线路103连接。
如图1所示，所述开路检测电路还包括电容C12，所述二极管的负极与所述电容C12的一端连接，所述电容C12的另一端与所述应急电源线路101的负极连接。
如图1所示，所述电容C12为滤波电容。
如图1所示，所述应急电源线路101设有电源电流反馈脚CS，所述电源电流反馈脚CS连接于所述电阻R2、电阻R3之间。
如图1所示，所述二极管D1为整流二极管。
本发明提供的一种LED应急灯电源的开路检测电路的工作原理如下：
当应急电源线路101开始工作时，输出电流经二极管D1整流，电容C12滤波，再经二极管D2加至LED灯具102的正极.，电流再由LED灯具102的负极，再经电阻R2、电阻R3到应急电源线路101的负极，电流在电阻R2与电阻R3上形成电压，电阻R2的上电压接至电源电流反馈脚CS，以控制应急电源线路101的输出电流，电阻R3与电阻R2上的电压经电阻R4到三极管Q13的基极，则三极管Q13导通，光耦OP1A与电阻R1通电，光耦OP1A的C、E极导通，输送信号到检测线路103，完成通电检测；
当LED光源开路时，电阻R2与电阻R3上的电流消失，三极管Q13关断，光耦OP1A关断，检测线路103检测不到信号，关闭应急电源线路101；
当LED光源短路时，电阻R3上形成较高的压降，输送至电源电流反馈脚CS，停止系统工作。
本发明提供的一种LED应急灯电源的开路检测电路，可以较好的解决LED专用应急电源系统的光源开路检测和短路检测，成本较低。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。

Claims (5)

  1. 一种LED应急灯电源的开路检测电路，其特征在于：包括应急电源线路、二极管D1、二极管D2、LED灯具、电阻R1、光耦OP1A、检测线路、三极管Q13、电阻R2、电阻R3和电阻R4，其中，所述应急电源线路的正极与所述二极管D1的正极连接，所述二极管D1的负极与所述二极管D2的正极连接，所述二极管D2的负极与所述LED灯具的正极连接所述LED灯具的负极分别与所述电阻R2的一端、电阻R4的一端连接，所述电阻R4的另一端与所述三极管Q13的基极连接，所述三极管Q13的集电极与所述光耦OP1A的引脚2连接，所述三极管Q13的发射极与所述应急电源线路的负极连接，所述电阻R2的另一端与所述电阻R3的一端连接，所述电阻R3的另一端与所述应急电源线路的负极连接，所述二极管的负极与所述电阻R1的一端连接，所述电阻R1的另一端与所述光耦OP1A的引脚1连接，所述光耦OP1A的C、E极分别与所述检测线路连接。
  2. 根据权利要求1所述的LED应急灯电源的开路检测电路，其特征在于：所述开路检测电路还包括电容C12，所述二极管的负极与所述电容C12的一端连接，所述电容C12的另一端与所述应急电源线路的负极连接。
  3. 根据权利要求1所述的LED应急灯电源的开路检测电路，其特征在于：所述电容C12为滤波电容。
  4. 根据权利要求1所述的LED应急灯电源的开路检测电路，其特征在于：所述应急电源线路设有电源电流反馈脚CS，所述电源电流反馈脚CS连接于所述电阻R2、电阻R3之间。
  5. 根据权利要求1所述的LED应急灯电源的开路检测电路，其特征在于：所述二极管D1为整流二极管。
PCT/CN2014/086516 2014-09-15 2014-09-15 一种led应急灯电源的开路检测电路 WO2016041123A1 (zh)

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CN114047456A (zh) * 2021-10-18 2022-02-15 赖云飞 一种led电源测试控制电路

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