WO2015013962A1 - Led illumination independent type control system - Google Patents

Led illumination independent type control system Download PDF

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Publication number
WO2015013962A1
WO2015013962A1 PCT/CN2013/080652 CN2013080652W WO2015013962A1 WO 2015013962 A1 WO2015013962 A1 WO 2015013962A1 CN 2013080652 W CN2013080652 W CN 2013080652W WO 2015013962 A1 WO2015013962 A1 WO 2015013962A1
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WO
WIPO (PCT)
Prior art keywords
led
current
power supply
operational amplifier
led power
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PCT/CN2013/080652
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French (fr)
Chinese (zh)
Inventor
杨子明
鲁建
赖东强
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深圳市日上光电股份有限公司
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Publication of WO2015013962A1 publication Critical patent/WO2015013962A1/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
    • H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs
    • 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
    • H05B45/54—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a series array of LEDs
    • 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 technical field of LED lighting, in particular to an LED lighting independent control system for avoiding over-current and over-temperature of a circuit.
  • the lamp has the characteristics of high light conversion efficiency, low energy consumption, small size and long life. It is gradually used in various lighting fields, especially in advertising signs such as letter lights, signs, advertising light boxes. Such occasions are widely used.
  • the long life of the LED lamp is based on a safe working environment. When the LED is exposed to electric shock or overheating damage, the LED lamp will fail and affect its service life.
  • the overcurrent shock that is, the current applied to the LED exceeds the maximum rated current in the LED technical data sheet, including overcurrent surges caused by overcurrent and overvoltage.
  • Overheat damage refers to the failure of components in LED luminaires in the event of overheating.
  • the LED lamp when the LED lamp encounters an electrical shock, it will also cause overheating damage to the components, which will affect the working life of the LED.
  • nearly 80% of the electrical energy is converted into thermal energy, and the performance and life of the LED are closely related to its working temperature.
  • the temperature inside the LED chip rises by 10 degrees, the luminous flux will be attenuated by 1%. Life expectancy is reduced by 50%. Therefore, in the LED lighting design, it is necessary to ensure that the LED lamp circuit is designed with an overcurrent protection or overheat protection circuit or device.
  • the LED power source usually only the LED power source directly connects a plurality of LED lights in series, and a protection circuit is set in the LED power circuit, and when the circuit is abnormal, the protection point of the power circuit is activated to start protection.
  • a circuit design can play a very good protection role when the LED power supply load line is short, that is, when the number of load LED lamps is small, but the external load line of the LED power supply is long, that is, when a plurality of external LED lights are connected, a short circuit occurs when the circuit is short-circuited.
  • the power has not yet reached the protection point of the LED power supply circuit and cannot protect the LED lamp circuit from overheating and burning under continuous high current.
  • the output power of the LED power source does not match the power of the LED lamp, it is more difficult to touch the protection point of the LED power circuit during overcurrent, such as the load power of the lamp when the 200W power supply overcurrent protection point reaches 300W or higher. However, it is only 100W or less. Because the wiring is too long, it is difficult to achieve automatic protection of the power protection point. In the long-term overcurrent, the component may overheat and even cause fire, which may cause a safety hazard.
  • the technical problem to be solved by the present invention is that the LED light source external load line is too long for the related LED lighting control system design process, so that it is not damaged by the protection point of the LED power supply circuit when it is subjected to over-current shock or overheat damage.
  • the entire LED lighting circuit which affects the service life of the LED lamp, provides an LED lighting independent control system for avoiding over- or over-temperature of the LED circuit.
  • an LED lighting independent control system comprising an LED power supply and at least one LED light group formed by connecting a plurality of LED lights in series, wherein the at least one LED light group is connected in parallel
  • the LED power source further includes an LED protection device connected in series between the LED power source and each of the LED lamp groups for detecting an output current of the LED power source and controlling the output current according to the detected output current
  • the LED lamp group is turned on and off with the LED power source.
  • the LED protection device comprises:
  • a current detecting unit is connected in series between the LED power source and the LED lamp group to detect an energizing current between the LED power source and the LED lamp group;
  • a switch control unit is connected in series between the LED power source and the LED lamp group to control on and off between the LED power source and the LED lamp group;
  • control unit respectively connected to the current detecting unit and the switch control unit, configured to control the switch control unit according to an energization current detected by the current detecting unit
  • the LED lamp group is turned on and off with the LED power source.
  • the control unit includes a self-locking unlocking component for self-locking and unlocking the circuit and a driving control component for driving the switch control unit;
  • the drive control component is connected to the current detecting unit and the switch control unit, and receives an energization current detected by the current detecting unit, and controls the driving control component to drive the current when the energizing current exceeds a protection point.
  • the switch control unit disconnects the power supply of the LED power supply and the LED light group;
  • the self-locking unlocking component is connected to the current detecting unit and the driving control component, and receives an energizing current detected by the current detecting unit, and controls the driving control component when the energizing current does not exceed a protection point.
  • the switch control unit is driven to restore power supply of the LED power source and the LED light group.
  • the current detecting unit includes A current detecting resistor, a polymer positive temperature thermistor or an overcurrent identifying circuit for detecting a passing current between the LED power source and the LED lamp group is connected.
  • the switch control unit is a MOS tube.
  • the LED protection device further includes a separate housing electrically connected to the LED power source and the LED lamp group via wires, respectively.
  • the LED protection device housing is provided with heat dissipation fins.
  • the LED protection device includes a resistor R1 for detecting an energizing current, a switching transistor Q1 for controlling a circuit to be turned on, an operational amplifier U1, an operational amplifier U2, a diode D1, and a diode D2;
  • the input terminal 3 is used for positive feedback of the current to achieve the purpose of self-locking and unlocking;
  • the output terminal 1 of the operational amplifier U1 is connected to the inverting input terminal 6 of the operational amplifier U2 through the diode D1, and the non-inverting input terminal 5 of the operational amplifier U2 is connected to the LED power supply.
  • the positive terminal, the output end of the operational amplifier U2 is electrically connected to the switch tube Q1 for controlling the on and off of the switch tube Q1.
  • the LED protection device further includes current limiting resistors R8, R9, R2, R7;
  • the current flows from the positive pole of the LED power source through the current limiting resistor R8 and the current limiting resistor R9 to the inverting input terminal 2 of the operational amplifier U1; the negative pole of the LED power supply is connected to the resistor R1 and the current limiting resistor R2 to the non-inverting input terminal 3 of the operational amplifier U1; The anode of the LED power supply is connected to the non-inverting input terminal 5 of the operational amplifier U2 through a current limiting resistor R8 and a current limiting resistor R7.
  • the LED lighting independent control system provided by the present invention is connected between the LED power source and each LED light group which is connected in series by connecting several LED lights to the LED power source.
  • the LED protection device thereby separately detecting and controlling the current of the LED power supply and the current branch of each LED lamp group, so that when a certain current branch is over-powered, the circuit can be controlled to be turned on and off without waiting for it to be reached.
  • the protection point of the LED power circuit starts the circuit protection, making the whole LED circuit more secure.
  • Figure 1 is a schematic view of the structure of the present invention.
  • FIG. 2 is a circuit diagram of an LED lighting system of the present invention.
  • LED power supply 1, LED light group; 3, LED protection device; 3a, current detection unit; 3b, self-locking unlocking component; 3c, drive control component; 3d, switch control unit.
  • the invention discloses an LED lighting independent control system, In order to avoid the LED power supply line being too long or other external environmental reasons, the protection point of the LED power circuit is not reached when the circuit is over-current or overheated, and the protection of the LED circuit cannot be started.
  • the LED lighting independent control system comprises: an LED power supply 1 and at least one LED light group 2 formed by connecting a plurality of LED lights in series, and a plurality of LED light groups 2 are connected in parallel to the LED power supply 1 to form an independently controlled branch, and further comprising An LED protection device 3 connected in series between the LED power source 1 and each LED lamp group 2, the protection device 3 is configured to detect the output current of the LED power source 1 and control the LED lamp group 2 according to the detected output current
  • the on/off of the LED power source 1 can separately detect and control the current of the current branch between the LED power source 1 and each of the LED lamp groups 2, so that the current branch can be controlled in time when an overcurrent or short circuit occurs in each branch.
  • the on/off of the road while the normal operation of other branches, does not need to wait until it reaches the protection point of the LED power supply 1 circuit to start the circuit protection, and at the same time control the on and off of all current branches, so it can Timely protection of each current branch, avoiding the ignition of lighting equipment caused by each current branch, and ensuring the safety of the entire LED lighting system.
  • the protection device 3 can include a separate outer casing for the electronic circuit to be disposed therein, and is connected between the LED power source 1 and the LED lamp group 2 through a wire as a separate device for overcurrent protection. The role.
  • the heat-dissipating fins are arranged on the outer casing of the protection device 3 to reduce the temperature of the protection device 3, to prevent the temperature from being too high to initiate protection, and to affect the normal operation of the circuit between the LED power source 1 and the LED lamp group 2.
  • the LED protection device 3 of the present embodiment includes a current detecting unit 3a connected in series between the LED power source 1 and the LED lamp group 2 for detecting an energizing current thereof; and serially connected to the LED power source 1 and the LED lamp group 2 a switch control unit 3d for controlling the on and off of the energization circuit; a control unit respectively connected to the current detecting unit 3a and the switch control unit 3d for the energization current detected by the current detecting unit 3a to control the switch control unit 3d control LED
  • the lamp group 2 is turned on and off with the LED power source 1.
  • the control unit includes a self-locking unlocking assembly 3b for self-locking and unlocking the circuit and a drive control assembly 3c for driving the switch control unit 3d.
  • the drive control unit 3c is connected to the current detecting unit 3a and the switch control unit 3d, and receives the energization current detected by the current detecting unit 3a. When the energizing current exceeds the protection point of the power circuit, the drive control unit 3c is controlled to drive the switch control unit 3d. Turn on the power supply of LED power supply 1 and LED light group 2.
  • the self-locking unlocking component 3b is connected to the current detecting unit 3a and the driving control component 3c, and receives the energizing current detected by the current detecting unit 3a. When the energizing current does not exceed the protection point of the power circuit, the driving control component 3c is controlled to drive the switch control unit.
  • the switch control unit 3d in this scheme selects the MOS tube because it has good temperature characteristics and is not susceptible to temperature changes in the circuit environment.
  • the current detecting unit 3a may be a current detecting resistor, a polymer positive temperature thermistor or an overcurrent identifying circuit.
  • the current detecting unit 3a connected between the LED power source 1 and the LED lamp group 2 for detecting the passing current is a current detecting resistor
  • the drive control component 3c receives the current detected by the current detecting unit 3a beyond the protection point of the power supply circuit, the drive control component 3c outputs a low potential, and the MOS transistor is turned off at a low potential.
  • the circuit between the LED power source 1 and the LED light group 2 is disconnected, thereby avoiding the phenomenon that the circuit is overheated due to continuous high current impact and causing the lighting device to ignite.
  • the over-current identification circuit can also be selected as the current detecting unit 3a.
  • the over-current identification circuit is selected as the current detecting unit 3a of the protection device, the working principle is the same as the current detecting resistor, and the direct detecting by the over-current identification circuit is mainly used. Abnormal current in the circuit.
  • the current detecting unit 3a connected between the LED power source 1 and the LED lamp group 2 is a polymer positive temperature thermistor
  • the control driving control component 3c outputs a high potential to the MOS transistor to make the MOS transistor at a high potential.
  • the drive control component 3c receives the current.
  • the energization current detected by the detecting unit 3a exceeds the protection point of the power supply circuit, the driving control component 3c outputs a low potential, and the MOS transistor is turned off at a low potential, and the circuit between the LED power source 1 and the LED lamp group 2 is turned off, thereby Avoid continuous high current surges that cause the circuit to overheat and be damaged.
  • the polymer positive temperature thermistor When the overcurrent or high temperature state in the circuit is removed, the polymer positive temperature thermistor returns to normal; the polymer positive temperature thermistor is small in size, low in cost, and has obvious reaction to temperature changes in the environment, which is beneficial to avoid overheating in the circuit. Damage and damage the circuit.
  • FIG. 2 discloses a circuit diagram of one embodiment of the LED protection device 3 of the present invention.
  • the circuit diagram of the LED protection device 3 mainly includes a resistor R1 for detecting an energization current, a switching transistor Q1 for controlling the switching of the control circuit, an operational amplifier U1, an operational amplifier U2, a diode D1, a diode D2, and current limiting resistors R8, R9, and R2. R7, etc.; of course, some auxiliary circuit devices, such as capacitors C1-C4, resistors R3-R6, diode D3, etc., may also be included.
  • the LED protection device 3 can include a casing, and the circuit device can be disposed on a circuit board and installed in the casing, and then connected between the LED power source 1 and the LED lamp group 2 through a wire to serve The role of overcurrent protection.
  • the current flows from the positive pole of the LED power source 1 through the current limiting resistor R8 and the current limiting resistor R9 to the inverting input terminal 2 of the operational amplifier U1; the negative terminal of the LED power source 1 is connected to the resistor R1 and the current limiting resistor R2 to the non-inverting input terminal of the operational amplifier U1.
  • the output terminal 1 of the operational amplifier U1 is connected to the diode D2 to the non-inverting input terminal 3 of the operational amplifier U1 for positive current feedback to achieve the purpose of self-locking and unlocking; the output terminal 1 of the operational amplifier U1 is connected to the operational amplifier U2 through the diode D1.
  • the inverting input terminal 6, the anode of the LED power supply 1 is connected to the non-inverting input terminal 5 of the operational amplifier U2 through the current limiting resistor R8 and the current limiting resistor R7, and the output terminal of the operational amplifier U2 is electrically connected with the switching transistor Q1 for controlling the switching tube The continuity of Q1.
  • the resistor R1 When an abnormal current passes or is short-circuited in the circuit, the resistor R1 generates a detection voltage and is connected to the operational amplifier U1 through the current limiting resistor R2. At this time, the operational amplifier U1 operates on the voltage flowing into the inverting input terminal 2 and the non-inverting input terminal 3. The output voltage is amplified by the output terminal 1 and connected to the inverting input terminal 6 of the operational amplifier U2 through the diode D1. The output terminal 1 of the operational amplifier U1 is also connected to the non-inverting input terminal 3 of the operational amplifier U1 through the diode D2 to realize positive current feedback. It is used to limit the energizing current and realize the self-locking function.
  • the inverting input terminal 6 of the operational amplifier U2 receives the amplified detection voltage from the operational amplifier U1, and compares with the voltage of the non-inverting input terminal 5 connected to the positive pole of the LED power supply 1 through the resistor R7 and the resistor R8, and passes through the output terminal 7 to the switching transistor Q1.
  • the output low potential causes the switching transistor Q1 to be in an off state, so that the current branch is broken, thereby preventing the circuit from being damaged by overheating or even igniting due to continuous large current.
  • the resistor R1 When the circuit returns to normal, the resistor R1 does not generate the detection voltage, the output terminal 1 of the operational amplifier U1 does not output the amplified detection voltage to the arithmetic processor U2, and the arithmetic processor U2 inputs a high potential to the switch Q1 to drive its conduction, and restores the Current branch current path.
  • the arithmetic processor U1 When the arithmetic processor U1 does not output the amplified detection voltage, the diode D2 is unlocked.

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Abstract

An LED illumination independent type control system comprises an LED power supply (1) and at least one LED lighting set (2) formed by several LED lamps connected in series, at least one LED lighting set being connected with the LED power supply in parallel. The LED illumination independent type control system also comprises an LED protection device (3) electrically connected in series between the LED power supply (1) and each LED lighting set (2) and for detecting an output current of the LED power supply (1) and controlling the connection and disconnection of the LED lighting set (2) and the LED power supply (1) according to the detected output current.

Description

一种LED照明独立式控制***  LED lighting independent control system 技术领域  Technical field
本发明涉及LED照明技术领域，具体涉及用于避免电路过电与过温的一种LED照明独立式控制***。  The invention relates to the technical field of LED lighting, in particular to an LED lighting independent control system for avoiding over-current and over-temperature of a circuit.
背景技术  Background technique
LED 灯作为新型绿色照明技术，具有光转换效率高、能耗低、体积小、寿命长的特点，逐渐被应用于各种照明领域，尤其是在广告标识灯，如字母灯、标志牌、广告灯箱等场合得到广泛应用。LED灯的寿命长是基于安全的工作环境，当LED在面临过电冲击或过热损伤时会导致LED灯失效，影响其使用寿命。过电冲击即在LED上施加的电流超过该LED技术数据手册上的最大额定电流，包括过电流和过电压引起的过电冲击。过热损伤是指LED灯具中的元器件在过热情况下导致失效，通常在LED灯遭遇过电冲击时也会使其中的元器件受到过热损伤，影响LED的工作寿命。在LED照明设计中，有接近80%的电能会转化为热能，而且LED的性能和寿命与其工作温度密切相关，通常当LED芯片内温度升高10度，其光通量就会衰减1%，LED的寿命减少50%。因此，在LED照明设计中，必须保证LED灯电路中设计有过电保护或过热保护电路或装置。 led As a new green lighting technology, the lamp has the characteristics of high light conversion efficiency, low energy consumption, small size and long life. It is gradually used in various lighting fields, especially in advertising signs such as letter lights, signs, advertising light boxes. Such occasions are widely used. The long life of the LED lamp is based on a safe working environment. When the LED is exposed to electric shock or overheating damage, the LED lamp will fail and affect its service life. The overcurrent shock, that is, the current applied to the LED exceeds the maximum rated current in the LED technical data sheet, including overcurrent surges caused by overcurrent and overvoltage. Overheat damage refers to the failure of components in LED luminaires in the event of overheating. Usually, when the LED lamp encounters an electrical shock, it will also cause overheating damage to the components, which will affect the working life of the LED. In the LED lighting design, nearly 80% of the electrical energy is converted into thermal energy, and the performance and life of the LED are closely related to its working temperature. Usually, when the temperature inside the LED chip rises by 10 degrees, the luminous flux will be attenuated by 1%. Life expectancy is reduced by 50%. Therefore, in the LED lighting design, it is necessary to ensure that the LED lamp circuit is designed with an overcurrent protection or overheat protection circuit or device.
在LED照明控制***设计过程中，通常只LED电源直接串联接入多个LED灯，并在LED电源电路中设置保护电路，当电路出现异常即触动电源电路的保护点而启动保护。这样的电路设计在LED电源负载线短，即负载LED灯数量少时能起到很好防护作用，但在LED电源外接负载线长，即外接多个LED灯时会出现在电路短路时，短路的功率还没有达到LED电源电路的保护点而无法起保护作用，使LED灯电路在持续的大电流下产生过热而燃烧的情况。而且当LED电源的输出功率与LED灯的功率不匹配时，在过电流时更难触动LED电源电路的保护点，如在200W的电源过流保护点达到300W甚至更高时，灯的负载功率却只有100W甚至更少，由于接线太长，难以达到电源保护点无法进行自动保护，在长时间过电流容易引起元器件过热操作甚至导致起火，造成安全隐患。 In the design process of the LED lighting control system, usually only the LED power source directly connects a plurality of LED lights in series, and a protection circuit is set in the LED power circuit, and when the circuit is abnormal, the protection point of the power circuit is activated to start protection. Such a circuit design can play a very good protection role when the LED power supply load line is short, that is, when the number of load LED lamps is small, but the external load line of the LED power supply is long, that is, when a plurality of external LED lights are connected, a short circuit occurs when the circuit is short-circuited. The power has not yet reached the protection point of the LED power supply circuit and cannot protect the LED lamp circuit from overheating and burning under continuous high current. Moreover, when the output power of the LED power source does not match the power of the LED lamp, it is more difficult to touch the protection point of the LED power circuit during overcurrent, such as the load power of the lamp when the 200W power supply overcurrent protection point reaches 300W or higher. However, it is only 100W or less. Because the wiring is too long, it is difficult to achieve automatic protection of the power protection point. In the long-term overcurrent, the component may overheat and even cause fire, which may cause a safety hazard.
发明内容  Summary of the invention
本发明要解决的技术问题在于针对相关LED照明控制***设计过程中存在的由于LED电源外接负载线过长，导致其受到过电冲击或过热损伤时并不动触动LED电源电路的保护点而损毁整个LED照明电路，影响LED灯的使用寿命的不足，提供一种用于避免LED电路过电或过温的LED照明独立式控制***。 The technical problem to be solved by the present invention is that the LED light source external load line is too long for the related LED lighting control system design process, so that it is not damaged by the protection point of the LED power supply circuit when it is subjected to over-current shock or overheat damage. The entire LED lighting circuit, which affects the service life of the LED lamp, provides an LED lighting independent control system for avoiding over- or over-temperature of the LED circuit.
本发明解决其技术问题所采用的技术方案是：一种LED照明独立式控制***，包括LED电源和至少一个由若干LED灯串联而成的LED灯组，所述至少一个LED灯组并联接入所述LED电源；还包括串联接入在所述LED电源与每一所述LED灯组之间的LED保护装置，用以检测所述LED电源的输出电流并根据检测的所述输出电流控制所述LED灯组与所述LED电源的通断。 The technical solution adopted by the present invention to solve the technical problem thereof is: an LED lighting independent control system, comprising an LED power supply and at least one LED light group formed by connecting a plurality of LED lights in series, wherein the at least one LED light group is connected in parallel The LED power source further includes an LED protection device connected in series between the LED power source and each of the LED lamp groups for detecting an output current of the LED power source and controlling the output current according to the detected output current The LED lamp group is turned on and off with the LED power source.
在本发明所述的LED照明独立式控制***中，所述LED保护装置包括： In the LED lighting independent control system of the present invention, the LED protection device comprises:
电流检测单元，串联接入在所述LED电源与LED灯组之间，用以检测所述LED电源与LED灯组之间的通电电流； a current detecting unit is connected in series between the LED power source and the LED lamp group to detect an energizing current between the LED power source and the LED lamp group;
开关控制单元，串联接入在所述LED电源与LED灯组之间，用以控制所述LED电源与LED灯组之间的通断； a switch control unit is connected in series between the LED power source and the LED lamp group to control on and off between the LED power source and the LED lamp group;
控制单元，分别与所述电流检测单元和所述开关控制单元相连，用于根据所述电流检测单元检测到的通电电流，来控制所述开关控制单元控制 所述LED灯组与所述LED电源的通断。 a control unit, respectively connected to the current detecting unit and the switch control unit, configured to control the switch control unit according to an energization current detected by the current detecting unit The LED lamp group is turned on and off with the LED power source.
在本发明所述的LED照明独立式控制***中， 所述控制单元包括用于对电路实现自锁与解锁的自锁解锁组件和用于驱动开关控制单元的驱动控制组件； In the LED lighting independent control system of the present invention, The control unit includes a self-locking unlocking component for self-locking and unlocking the circuit and a driving control component for driving the switch control unit;
所述驱动控制组件与所述电流检测单元和所述开关控制单元连接，接收所述电流检测单元检测到的通电电流，当所述通电电流超出保护点时，控制所述驱动控制组件来驱动所述开关控制单元断开所述LED电源与所述LED灯组的供电； The drive control component is connected to the current detecting unit and the switch control unit, and receives an energization current detected by the current detecting unit, and controls the driving control component to drive the current when the energizing current exceeds a protection point. The switch control unit disconnects the power supply of the LED power supply and the LED light group;
所述自锁解锁组件与所述电流检测单元和所述驱动控制组件连接，接收所述电流检测单元检测到的通电电流，当所述通电电流未超出保护点时，控制所述驱动控制组件来驱动所述开关控制单元恢复所述LED电源与所述LED灯组的供电。 The self-locking unlocking component is connected to the current detecting unit and the driving control component, and receives an energizing current detected by the current detecting unit, and controls the driving control component when the energizing current does not exceed a protection point. The switch control unit is driven to restore power supply of the LED power source and the LED light group.
在本发明所述的LED照明独立式控制***中， 所述的电流检测单元包括 连接在所述LED电源和LED灯组之间检测通过电流的 电流侦测电阻、高分子正温热敏电阻或过电流识别电路。 In the LED lighting independent control system of the present invention, the current detecting unit includes A current detecting resistor, a polymer positive temperature thermistor or an overcurrent identifying circuit for detecting a passing current between the LED power source and the LED lamp group is connected.
在本发明所述的LED照明独立式控制***中， 所述的开关控制单元为MOS管。 In the LED lighting independent control system of the present invention, the switch control unit is a MOS tube.
在本发明所述的LED照明独立式控制***中， 所述LED保护装置还包括独立的外壳，分别通过导线与所述LED电源和LED灯组导电连接。 In the LED lighting independent control system of the present invention, The LED protection device further includes a separate housing electrically connected to the LED power source and the LED lamp group via wires, respectively.
在本发明所述的LED照明独立式控制***中，所述LED保护装置外壳上设有散热鳍片。 In the LED lighting independent control system of the present invention, the LED protection device housing is provided with heat dissipation fins.
在本发明所述的LED照明独立式控制***中， 所述LED保护装置包括用于检测通电电流的电阻R1、控制电路通断的开关管Q1、运算放大器U1、运算放大器U2、二极管D1和二极管D2； In the LED lighting independent control system of the present invention, The LED protection device includes a resistor R1 for detecting an energizing current, a switching transistor Q1 for controlling a circuit to be turned on, an operational amplifier U1, an operational amplifier U2, a diode D1, and a diode D2;
电流从所述LED电源正极流入运算放大器U1的反相输入端2，LED电源负极连接电阻R1到运算放大器U1的同相输入端3，运算放大器U1的输出端1连接二极管D2到运算放大器U1的同相输入端3，用以实现电流正反馈，以达到自锁解锁目的；运算放大器U1的输出端1通过二极管D1连接运算放大器U2的反相输入端6，运算放大器U2的同相输入端5连接LED电源正极，运算放大器U2的输出端与开关管Q1电连接,用以控制开关管Q1的通断。 The current flows from the positive pole of the LED power source to the inverting input terminal 2 of the operational amplifier U1, the negative pole of the LED power source is connected to the resistor R1 to the non-inverting input terminal 3 of the operational amplifier U1, and the output terminal 1 of the operational amplifier U1 is connected to the in-phase of the operational amplifier U1. The input terminal 3 is used for positive feedback of the current to achieve the purpose of self-locking and unlocking; the output terminal 1 of the operational amplifier U1 is connected to the inverting input terminal 6 of the operational amplifier U2 through the diode D1, and the non-inverting input terminal 5 of the operational amplifier U2 is connected to the LED power supply. The positive terminal, the output end of the operational amplifier U2 is electrically connected to the switch tube Q1 for controlling the on and off of the switch tube Q1.
在本发明所述的LED照明独立式控制***中， 所述的LED保护装置还包括限流电阻R8、R9、R2、R7； In the LED lighting independent control system of the present invention, The LED protection device further includes current limiting resistors R8, R9, R2, R7;
电流从所述LED电源正极流经限流电阻R8、限流电阻R9流入运算放大器U1的反相输入端2；LED电源负极连接电阻R1、限流电阻R2到运算放大器U1的同相输入端3；LED电源正极通过限流电阻R8、限流电阻R7连接到运算放大器U2的同相输入端5。 The current flows from the positive pole of the LED power source through the current limiting resistor R8 and the current limiting resistor R9 to the inverting input terminal 2 of the operational amplifier U1; the negative pole of the LED power supply is connected to the resistor R1 and the current limiting resistor R2 to the non-inverting input terminal 3 of the operational amplifier U1; The anode of the LED power supply is connected to the non-inverting input terminal 5 of the operational amplifier U2 through a current limiting resistor R8 and a current limiting resistor R7.
本发明与现有技术相比具有如下优点：本发明所提供的LED照明独立式控制***，在LED电源与每一个并联接入LED电源的由若干LED灯串接而成的LED灯组之间接入LED保护装置，从而单独检测和控制LED电源与每一LED灯组的电流支路的通电电流，使其在某一电流支路出现过电时即可控制电路的通断而无需待其达到LED电源电路的保护点才启动电路保护，使得整个LED电路更加安全。 Compared with the prior art, the present invention has the following advantages: the LED lighting independent control system provided by the present invention is connected between the LED power source and each LED light group which is connected in series by connecting several LED lights to the LED power source. Into the LED protection device, thereby separately detecting and controlling the current of the LED power supply and the current branch of each LED lamp group, so that when a certain current branch is over-powered, the circuit can be controlled to be turned on and off without waiting for it to be reached. The protection point of the LED power circuit starts the circuit protection, making the whole LED circuit more secure.
附图说明  DRAWINGS
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 in conjunction with the accompanying drawings and embodiments, in which:
图1是本发明的结构示意图。 Figure 1 is a schematic view of the structure of the present invention.
图2是本发明LED照明***的电路图。 2 is a circuit diagram of an LED lighting system of the present invention.
图中：1、LED电源；2、LED灯组；3、LED保护装置；3a、电流检测单元；3ｂ、自锁解锁组件；3c、驱动控制组件；3d、开关控制单元。 In the figure: 1, LED power supply; 2, LED light group; 3, LED protection device; 3a, current detection unit; 3b, self-locking unlocking component; 3c, drive control component; 3d, switch control unit.
具体实施方式  detailed description
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。 For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.
本发明公开一种LED照明独立式控制***， 用以避免因LED电源负载线过长或其他外部环境原因导致在电路出现过流或过热时未达到LED电源电路的保护点，无法启动保护而致使LED电路损毁的问题。该LED照明独立式控制***包括：包括LED电源1和至少一个由若干LED灯串联而成的LED灯组2，若干LED灯组2并联接入LED电源1上形成独立控制的支路，还包括串联接入在LED电源1与每一LED灯组2之间支路的LED保护装置3，保护装置3用以检测LED电源1的输出电流并根据检测的输出电流控制LED灯组2与所述LED电源1的通断，可以单独检测和控制LED电源1与每一LED灯组2之间的电流支路的通电电流，使其在各支路出现过流或短路时能够及时控制该电流支路的通断，而其他支路的正常工作，无需待其达到LED电源1电路的保护点才启动电路保护，同时控制所有电流支路的通断，因此其能 及时保护各电流支路，避免各电流支路引发照明设备起火现象，保证整个 LED 照明***的安全 。 The invention discloses an LED lighting independent control system, In order to avoid the LED power supply line being too long or other external environmental reasons, the protection point of the LED power circuit is not reached when the circuit is over-current or overheated, and the protection of the LED circuit cannot be started. The LED lighting independent control system comprises: an LED power supply 1 and at least one LED light group 2 formed by connecting a plurality of LED lights in series, and a plurality of LED light groups 2 are connected in parallel to the LED power supply 1 to form an independently controlled branch, and further comprising An LED protection device 3 connected in series between the LED power source 1 and each LED lamp group 2, the protection device 3 is configured to detect the output current of the LED power source 1 and control the LED lamp group 2 according to the detected output current The on/off of the LED power source 1 can separately detect and control the current of the current branch between the LED power source 1 and each of the LED lamp groups 2, so that the current branch can be controlled in time when an overcurrent or short circuit occurs in each branch. The on/off of the road, while the normal operation of other branches, does not need to wait until it reaches the protection point of the LED power supply 1 circuit to start the circuit protection, and at the same time control the on and off of all current branches, so it can Timely protection of each current branch, avoiding the ignition of lighting equipment caused by each current branch, and ensuring the safety of the entire LED lighting system.
可以理解的，该保护装置3可以包括一个独立的外壳，以供电子电路设置于其中，并通过导线连接在LED电源1与LED灯组2之间，作为一个独立的装置，起到过流保护的作用。保护装置3的外壳上设有散热鳍片，用以降低保护装置3的温度，避免因温度过高而启动保护，影响LED电源1与LED灯组2之间电路正常工作。 It can be understood that the protection device 3 can include a separate outer casing for the electronic circuit to be disposed therein, and is connected between the LED power source 1 and the LED lamp group 2 through a wire as a separate device for overcurrent protection. The role. The heat-dissipating fins are arranged on the outer casing of the protection device 3 to reduce the temperature of the protection device 3, to prevent the temperature from being too high to initiate protection, and to affect the normal operation of the circuit between the LED power source 1 and the LED lamp group 2.
本实施例的LED保护装置3，包括串联接入在LED电源1与LED灯组2之间的用以检测其通电电流的电流检测单元3a；串联接入在LED电源1与LED灯组2之间的用以控制通电电路的通断的开关控制单元3d；分别与电流检测单元3a和开关控制单元3d相连的控制单元，用于电流检测单元3a检测到的通电电流，来控制开关控制单元3d控制 LED 灯组2与LED电源1的通断。控制单元包括用于对电路实现自锁与解锁的自锁解锁组件3b和用于驱动开关控制单元3d的驱动控制组件3c。驱动控制组件3c与电流检测单元3a和开关控制单元3d连接，接收电流检测单元3a检测到的通电电流，当通电电流超出电源电路的保护点时，控制驱动控制组件3c来驱动开关控制单元3d断开LED电源1与LED灯组2的供电。自锁解锁组件3b与电流检测单元3a和驱动控制组件3c连接，接收电流检测单元3a检测到的通电电流，当通电电流未超出电源电路的保护点时，控制驱动控制组件3c来驱动开关控制单元3d恢复LED电源1与LED灯组2的供电。该方案中的开关控制单元3d选择MOS管，是由于其温度特性好，不易受电路环境中的温度变化的影响。其中的电流检测单元3a可以为电流侦测电阻、高分子正温热敏电阻或过电流识别电路。 The LED protection device 3 of the present embodiment includes a current detecting unit 3a connected in series between the LED power source 1 and the LED lamp group 2 for detecting an energizing current thereof; and serially connected to the LED power source 1 and the LED lamp group 2 a switch control unit 3d for controlling the on and off of the energization circuit; a control unit respectively connected to the current detecting unit 3a and the switch control unit 3d for the energization current detected by the current detecting unit 3a to control the switch control unit 3d control LED The lamp group 2 is turned on and off with the LED power source 1. The control unit includes a self-locking unlocking assembly 3b for self-locking and unlocking the circuit and a drive control assembly 3c for driving the switch control unit 3d. The drive control unit 3c is connected to the current detecting unit 3a and the switch control unit 3d, and receives the energization current detected by the current detecting unit 3a. When the energizing current exceeds the protection point of the power circuit, the drive control unit 3c is controlled to drive the switch control unit 3d. Turn on the power supply of LED power supply 1 and LED light group 2. The self-locking unlocking component 3b is connected to the current detecting unit 3a and the driving control component 3c, and receives the energizing current detected by the current detecting unit 3a. When the energizing current does not exceed the protection point of the power circuit, the driving control component 3c is controlled to drive the switch control unit. 3d restores the power supply of LED power supply 1 and LED light group 2. The switch control unit 3d in this scheme selects the MOS tube because it has good temperature characteristics and is not susceptible to temperature changes in the circuit environment. The current detecting unit 3a may be a current detecting resistor, a polymer positive temperature thermistor or an overcurrent identifying circuit.
当连接在LED电源1与LED灯组2之间用于检测通过电流的电流检测单元3a为电流侦测电阻时，当电路中有异常电流通过或短路时，电流侦测电阻的电压升高，说明该LED电源1的负载过高，驱动控制组件3c接收电流检测单元3a检测到的通电电流超出电源电路的保护点，驱动控制组件3c输出一个低电位，MOS管在低电位时处于截止状态，断开LED电源1与LED灯组2之间的电路，从而避免持续大电流冲击导致电路过热而引起照明设备起火现象。 When the current detecting unit 3a connected between the LED power source 1 and the LED lamp group 2 for detecting the passing current is a current detecting resistor, when an abnormal current passes or is short-circuited in the circuit, the voltage of the current detecting resistor rises. It is indicated that the load of the LED power source 1 is too high, the drive control component 3c receives the current detected by the current detecting unit 3a beyond the protection point of the power supply circuit, the drive control component 3c outputs a low potential, and the MOS transistor is turned off at a low potential. The circuit between the LED power source 1 and the LED light group 2 is disconnected, thereby avoiding the phenomenon that the circuit is overheated due to continuous high current impact and causing the lighting device to ignite.
当电路故障消除，且通电电流正常时，电流侦测电阻的电压正常，自锁解锁组件3b接收电流检测单元3a检测到的通电电流未超出电源电路的保护点时，控制驱动控制组件3c给MOS管输出一个高电位，来驱动开关控制单元3d恢复LED电源1与LED灯组2的供电,使LED灯正常使用；电流侦测电阻对电路中电流变化反映灵敏，有利于避免电路中出现过电冲击而损毁电路。方案中还可以选择过电识别电路作为其电流检测单元3a，选择过电识别电路作为该保护装置的电流检测单元3a时，其工作原理与电流侦测电阻一样，主要利用过电识别电路直接检测电路中电流异常情况。 When the circuit fault is eliminated and the energization current is normal, the voltage of the current detecting resistor is normal, and the self-locking unlocking component 3b receives the current detected by the current detecting unit 3a without exceeding the protection point of the power circuit, and controls the driving control component 3c to the MOS. The tube outputs a high potential to drive the switch control unit 3d to restore the power supply of the LED power supply 1 and the LED light group 2, so that the LED light is used normally; the current detecting resistor is sensitive to the current change in the circuit, which is beneficial to avoid over-current in the circuit. Shock and damage the circuit. In the solution, the over-current identification circuit can also be selected as the current detecting unit 3a. When the over-current identification circuit is selected as the current detecting unit 3a of the protection device, the working principle is the same as the current detecting resistor, and the direct detecting by the over-current identification circuit is mainly used. Abnormal current in the circuit.
当 连接在LED电源1与LED灯组2之间的电流检测单元3a为高分子正温热敏电阻时，在电路正常工作电流通过或电路中各元器件处于正常环境温度时，高分子正温热敏电阻处于低阻状态，自锁解锁组件3b接收电流检测单元3a检测到的通电电流未超出电源电路的保护点时，控制驱动控制组件3c给MOS管输出一个高电位，使MOS管在高电位时下处于导通状态，LED灯组2正常工作。当电路中有异常电流或环境温度升高时，大电流或环境升高所产生的热量使该高分子正温热敏电阻迅速膨胀，处于高阻状态，电压升高，驱动控制组件3c接收电流检测单元3a检测到的通电电流超出电源电路的保护点，驱动控制组件3c输出一个低电位，MOS管在低电位时处于截止状态，断开LED电源1与LED灯组2之间的电路，从而避免持续大电流冲击导致电路过热而损毁。当电路中过电流或高温状态排除后，高分子正温热敏电阻恢复正常；高分子正温热敏电阻体积小、成本低、而且对于环境中温度变化反应明显，有利于避免电路中出现过热损伤而损毁电路。 when When the current detecting unit 3a connected between the LED power source 1 and the LED lamp group 2 is a polymer positive temperature thermistor, when the normal working current of the circuit passes or the components in the circuit are at a normal ambient temperature, the polymer is warmed up. The varistor is in a low resistance state, and when the self-locking unlocking component 3b receives the current detected by the current detecting unit 3a and does not exceed the protection point of the power circuit, the control driving control component 3c outputs a high potential to the MOS transistor to make the MOS transistor at a high potential. Now in the on state, the LED lamp group 2 works normally. When there is abnormal current in the circuit or the ambient temperature rises, the heat generated by the high current or the environment causes the polymer positive temperature thermistor to rapidly expand, in a high resistance state, the voltage rises, and the drive control component 3c receives the current. The energization current detected by the detecting unit 3a exceeds the protection point of the power supply circuit, the driving control component 3c outputs a low potential, and the MOS transistor is turned off at a low potential, and the circuit between the LED power source 1 and the LED lamp group 2 is turned off, thereby Avoid continuous high current surges that cause the circuit to overheat and be damaged. When the overcurrent or high temperature state in the circuit is removed, the polymer positive temperature thermistor returns to normal; the polymer positive temperature thermistor is small in size, low in cost, and has obvious reaction to temperature changes in the environment, which is beneficial to avoid overheating in the circuit. Damage and damage the circuit.
图2公开了本发明LED保护装置3的一个具体实施方式的电路图。该LED保护装置3的电路图主要包括用于检测通电电流的电阻R1、控制电路通断的开关管Q1、运算放大器U1、运算放大器U2、二极管D1、二极管D2和限流电阻R8、R9、R2、R7等；当然，还可以包括一些辅助电路器件，如电容C1-C4、电阻R3-R6、二极管D3等。可以理解的，该LED保护装置3可以包括一个外壳，上述电路器件可以设置在一电路板上，并安装在该外壳中，再通过导线连接LED电源1和LED灯组2之间，以起到过流保护的作用。 Figure 2 discloses a circuit diagram of one embodiment of the LED protection device 3 of the present invention. The circuit diagram of the LED protection device 3 mainly includes a resistor R1 for detecting an energization current, a switching transistor Q1 for controlling the switching of the control circuit, an operational amplifier U1, an operational amplifier U2, a diode D1, a diode D2, and current limiting resistors R8, R9, and R2. R7, etc.; of course, some auxiliary circuit devices, such as capacitors C1-C4, resistors R3-R6, diode D3, etc., may also be included. It can be understood that the LED protection device 3 can include a casing, and the circuit device can be disposed on a circuit board and installed in the casing, and then connected between the LED power source 1 and the LED lamp group 2 through a wire to serve The role of overcurrent protection.
电流从所述LED电源1正极流经限流电阻R8、限流电阻R9流入运算放大器U1的反相输入端2；LED电源1负极连接电阻R1、限流电阻R2到运算放大器U1的同相输入端3；运算放大器U1的输出端1连接二极管D2到运算放大器U1的同相输入端3，用以实现电流正反馈，以达到自锁解锁目的；运算放大器U1的输出端1通过二极管D1连接运算放大器U2的反相输入端6，LED电源1正极通过限流电阻R8、限流电阻R7连接到运算放大器U2的同相输入端5，运算放大器U2的输出端与开关管Q1电连接,用以控制开关管Q1的通断。 The current flows from the positive pole of the LED power source 1 through the current limiting resistor R8 and the current limiting resistor R9 to the inverting input terminal 2 of the operational amplifier U1; the negative terminal of the LED power source 1 is connected to the resistor R1 and the current limiting resistor R2 to the non-inverting input terminal of the operational amplifier U1. 3; the output terminal 1 of the operational amplifier U1 is connected to the diode D2 to the non-inverting input terminal 3 of the operational amplifier U1 for positive current feedback to achieve the purpose of self-locking and unlocking; the output terminal 1 of the operational amplifier U1 is connected to the operational amplifier U2 through the diode D1. The inverting input terminal 6, the anode of the LED power supply 1 is connected to the non-inverting input terminal 5 of the operational amplifier U2 through the current limiting resistor R8 and the current limiting resistor R7, and the output terminal of the operational amplifier U2 is electrically connected with the switching transistor Q1 for controlling the switching tube The continuity of Q1.
当电路中有异常电流通过或短路时，电阻R1产生检测电压并通过限流电阻R2接入运算放大器U1中，此时运算放大器U1对流入反相输入端2与同相输入端3的电压进行运算，通过输出端1放大检测电压并通过二极管D1连接运算放大器U2的反相输入端6，运算放大器U1的输出端1还通过二极管D2连接到运算放大器U1的同相输入端3，实现电流正反馈，用于对通电电流进行限制，实现自锁功能。运算放大器U2的反相输入端6接收来自运算放大器U1的放大检测电压，与通过电阻R7、电阻R8连接LED电源1正极的同相输入端5的电压进行比对，通过输出端7向开关管Q1输出低电位，使开关管Q1处于截止状态，使该电流支路断路，从而避免电路中通过持续大电流导致过热甚至起火而损毁电路。当电路恢复正常时，电阻R1没有产生检测电压，运算放大器U1的输出端1并没有向运算处理器U2输出放大检测电压，运算处理器U2向开关管Q1输入高电位驱动其导通，恢复该电流支路电流通路。当运算处理器U1没有输出放大检测电压时，二极管D2实现解锁。 When an abnormal current passes or is short-circuited in the circuit, the resistor R1 generates a detection voltage and is connected to the operational amplifier U1 through the current limiting resistor R2. At this time, the operational amplifier U1 operates on the voltage flowing into the inverting input terminal 2 and the non-inverting input terminal 3. The output voltage is amplified by the output terminal 1 and connected to the inverting input terminal 6 of the operational amplifier U2 through the diode D1. The output terminal 1 of the operational amplifier U1 is also connected to the non-inverting input terminal 3 of the operational amplifier U1 through the diode D2 to realize positive current feedback. It is used to limit the energizing current and realize the self-locking function. The inverting input terminal 6 of the operational amplifier U2 receives the amplified detection voltage from the operational amplifier U1, and compares with the voltage of the non-inverting input terminal 5 connected to the positive pole of the LED power supply 1 through the resistor R7 and the resistor R8, and passes through the output terminal 7 to the switching transistor Q1. The output low potential causes the switching transistor Q1 to be in an off state, so that the current branch is broken, thereby preventing the circuit from being damaged by overheating or even igniting due to continuous large current. When the circuit returns to normal, the resistor R1 does not generate the detection voltage, the output terminal 1 of the operational amplifier U1 does not output the amplified detection voltage to the arithmetic processor U2, and the arithmetic processor U2 inputs a high potential to the switch Q1 to drive its conduction, and restores the Current branch current path. When the arithmetic processor U1 does not output the amplified detection voltage, the diode D2 is unlocked.
本发明是通过几个具体实施例进行说明的，本领域技术人员应当明白，在不脱离本发明范围的情况下，还可以对本发明进行各种变换和等同替代。另外，针对特定情形或具体情况，可以对本发明做各种修改，而不脱离本发明的范围。因此，本发明不局限于所公开的具体实施例，而应当包括落入本发明权利要求范围内的全部实施方式。 The present invention has been described in terms of several specific embodiments, and those skilled in the art will understand that various modifications and equivalents can be made to the present invention without departing from the scope of the invention. In addition, various modifications may be made to the invention without departing from the scope of the invention. Therefore, the invention is not limited to the specific embodiments disclosed, but all the embodiments falling within the scope of the appended claims.

Claims (9)

  1. 一种LED照明独立式控制***，包括LED电源（1）和至少一个由若干LED灯串联而成的LED灯组（2），所述至少一个LED灯组（2）并联接入所述LED电源（1），其特征在于：还包括串联接入在所述LED电源（1）与每一所述LED灯组（2）之间的LED保护装置（3），用以检测所述LED电源（1）的输出电流并根据检测的所述输出电流控制所述LED灯组（2）与所述LED电源（1）的通断。 An LED lighting independent control system comprising an LED power supply (1) and at least one LED light group (2) connected in series by a plurality of LED lights, wherein the at least one LED light group (2) is connected in parallel to the LED power supply (1) characterized in that it further comprises an LED protection device (3) connected in series between the LED power source (1) and each of the LED lamp groups (2) for detecting the LED power supply ( The output current of 1) controls the on and off of the LED lamp set (2) and the LED power supply (1) according to the detected output current.
  2. 根据权利要求1所述的LED照明独立式控制***，其特征在于：所述LED保护装置（3）包括：The LED lighting independent control system according to claim 1, wherein the LED protection device (3) comprises:
    电流检测单元（3a），串联接入在所述LED电源（1）与LED灯组（2）之间，用以检测所述LED电源（1）与LED灯组（2）之间的通电电流；a current detecting unit (3a) is connected in series between the LED power source (1) and the LED lamp group (2) for detecting an energizing current between the LED power source (1) and the LED lamp group (2) ;
    开关控制单元（3d），串联接入在所述LED电源（1）与LED灯组（2）之间，用以控制所述LED电源（1）与LED灯组（2）之间的通断；a switch control unit (3d) is connected in series between the LED power source (1) and the LED lamp group (2) for controlling on and off between the LED power source (1) and the LED lamp group (2) ;
    控制单元，分别与所述电流检测单元（3a）和所述开关控制单元（3d）相连，用于根据所述电流检测单元（3a）检测到的通电电流，来控制所述开关控制单元（3d）控制 所述LED灯组（2）与所述LED电源（1）的通断。 a control unit, respectively connected to the current detecting unit (3a) and the switch control unit (3d) for controlling the switch control unit according to an energization current detected by the current detecting unit (3a) (3d) )control The LED lamp group (2) is turned on and off with the LED power source (1).
  3. 根据权利要求2所述的 LED 照明独立式控制***，其特征在于：所述控制单元包括用于对电路实现自锁与解锁的自锁解锁组件（3b）和用于驱动开关控制单元（3d）的驱动控制组件（3c）；LED according to claim 2 a lighting independent control system, characterized in that: the control unit comprises a self-locking unlocking component (3b) for self-locking and unlocking the circuit and a driving control component (3c) for driving the switch control unit (3d);
    所述驱动控制组件（3c）与所述电流检测单元（3a）和所述开关控制单元（3d）连接，接收所述电流检测单元（3a）检测到的通电电流，当所述通电电流超出保护点时，控制所述驱动控制组件（3c）来驱动所述开关控制单元（3d）断开所述LED电源（1）与所述LED灯组（2）的供电；The drive control component (3c) is connected to the current detecting unit (3a) and the switch control unit (3d), and receives an energization current detected by the current detecting unit (3a), when the energizing current exceeds protection Pointing, controlling the drive control component (3c) to drive the switch control unit (3d) to disconnect the power supply of the LED power source (1) and the LED light group (2);
    所述自锁解锁组件（3b）与所述电流检测单元（3a）和所述驱动控制组件（3c）连接，接收所述电流检测单元（3a）检测到的通电电流，当所述通电电流未超出保护点时，控制所述驱动控制组件（3c）来驱动所述开关控制单元（3d）恢复所述LED电源（1）与所述LED灯组（2）的供电。The self-locking unlocking component (3b) is connected to the current detecting unit (3a) and the driving control component (3c), and receives an energizing current detected by the current detecting unit (3a), when the energizing current is not When the protection point is exceeded, the drive control component (3c) is controlled to drive the switch control unit (3d) to restore power supply of the LED power supply (1) and the LED light group (2).
  4. 根据权利要求2或3所述的LED照明独立式控制***，其特征在于：所述的电流检测单元（3a）包括 连接在所述LED电源 （1） 和LED灯组 （2） 之间检测通过电流的 电流侦测电阻、高分子正温热敏电阻或过电流识别电路。The LED lighting independent control system according to claim 2 or 3, characterized in that said current detecting unit (3a) comprises a power supply connected to said LED (1) A current detecting resistor, a polymer positive temperature thermistor or an overcurrent identifying circuit for detecting a current is detected between the LED lamp group (2) and the LED lamp group (2).
  5. 根据权利要求2或3所述的LED照明独立式控制***，其特征在于：所述的开关控制单元（3d）为MOS管。The LED lighting independent control system according to claim 2 or 3, characterized in that the switch control unit (3d) is a MOS tube.
  6. 根据权利要求1-5任一项所述的LED照明独立式控制***，其特征在于：所述LED保护装置（3）还包括独立的外壳，分别通过导线与所述LED电源（1）和LED灯组（2）导电连接。The LED lighting stand-alone control system according to any one of claims 1 to 5, characterized in that the LED protection device (3) further comprises a separate outer casing through the wires and the LED power source (1) and the LEDs respectively. The lamp set (2) is electrically connected.
  7. 根据权利要求6所述的LED照明独立式控制***，其特征在于：所述LED保护装置（3）外壳上设有散热鳍片。The LED lighting independent control system according to claim 6, wherein the LED protection device (3) is provided with a heat dissipating fin on the outer casing.
  8. 根据权利要求1-5任一项所述的LED照明独立式控制***，其特征在于: 所述LED保护装置（3）包括用于检测通电电流的电阻R1、控制电路通断的开关管Q1、运算放大器U1、运算放大器U2、二极管D1和二极管D2；The LED lighting independent control system according to any one of claims 1 to 5, characterized in that: The LED protection device (3) includes a resistor R1 for detecting an energizing current, a switching transistor Q1 for controlling a circuit to be turned on, an operational amplifier U1, an operational amplifier U2, a diode D1, and a diode D2;
    电流从所述LED电源（1）正极流入运算放大器U1的反相输入端2，所述LED电源（1）负极连接电阻R1到运算放大器U1的同相输入端3，运算放大器U1的输出端1连接二极管D2到运算放大器U1的同相输入端3，用以实现电流正反馈，以达到自锁解锁目的；运算放大器U1的输出端1通过二极管D1连接运算放大器U2的反相输入端6，运算放大器U2的同相输入端5连接LED电源（1）正极，运算放大器U2的输出端与开关管Q1电连接,用以控制开关管Q1的通断。The current flows from the anode of the LED power supply (1) to the inverting input terminal 2 of the operational amplifier U1. The negative terminal of the LED power supply (1) is connected to the non-inverting input terminal 3 of the operational amplifier U1, and the output terminal 1 of the operational amplifier U1 is connected. The diode D2 is connected to the non-inverting input terminal 3 of the operational amplifier U1 for realizing current positive feedback for self-locking and unlocking purposes; the output terminal 1 of the operational amplifier U1 is connected to the inverting input terminal 6 of the operational amplifier U2 through the diode D1, and the operational amplifier U2 The non-inverting input terminal 5 is connected to the positive pole of the LED power supply (1), and the output end of the operational amplifier U2 is electrically connected with the switch tube Q1 for controlling the on and off of the switch tube Q1.
  9. 根据权利要求6所述的LED照明独立式控制***，其特征在于：所述的LED保护装置（3）还包括限流电阻R8、R9、R2、R7；The LED lighting independent control system according to claim 6, wherein said LED protection device (3) further comprises current limiting resistors R8, R9, R2, R7;
    电流从所述LED电源（1）正极流经限流电阻R8、限流电阻R9流入运算放大器U1的反相输入端2；LED电源（1）负极连接电阻R1、限流电阻R2到运算放大器U1的同相输入端3；LED电源（1）正极通过限流电阻R8、限流电阻R7连接到运算放大器U2的同相输入端5。The current flows from the positive pole of the LED power supply (1) through the current limiting resistor R8 and the current limiting resistor R9 to the inverting input terminal 2 of the operational amplifier U1; the LED power supply (1) is connected to the negative resistor R1 and the current limiting resistor R2 to the operational amplifier U1. The non-inverting input terminal 3; the anode of the LED power supply (1) is connected to the non-inverting input terminal 5 of the operational amplifier U2 through a current limiting resistor R8 and a current limiting resistor R7.
PCT/CN2013/080652 2013-07-29 2013-08-01 Led illumination independent type control system WO2015013962A1 (en)

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