WO2012024978A1 - Système de commande intelligente et dynamique de del, source d'alimentation et procédé de commande - Google Patents

Système de commande intelligente et dynamique de del, source d'alimentation et procédé de commande Download PDF

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Publication number
WO2012024978A1
WO2012024978A1 PCT/CN2011/076454 CN2011076454W WO2012024978A1 WO 2012024978 A1 WO2012024978 A1 WO 2012024978A1 CN 2011076454 W CN2011076454 W CN 2011076454W WO 2012024978 A1 WO2012024978 A1 WO 2012024978A1
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WO
WIPO (PCT)
Prior art keywords
load
current
voltage
unit
control system
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/CN2011/076454
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English (en)
Chinese (zh)
Inventor
王宇
刘刚
孙逢振
曹大清
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.)
Sichuan Sunrain Sign & Display System Co Ltd
Original Assignee
Sichuan Sunrain Sign & Display System Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sichuan Sunrain Sign & Display System Co Ltd filed Critical Sichuan Sunrain Sign & Display System Co Ltd
Publication of WO2012024978A1 publication Critical patent/WO2012024978A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology

Definitions

  • the invention relates to an LED intelligent dynamic control system and a control method thereof, in particular to an LED intelligent dynamic control system and a control method with load automatic matching and over-limit warning function.
  • the LED is L i ght Emi t t ing Diode , which is called a light-emitting diode in Chinese.
  • LED has been widely used in the display field due to its inherent characteristics.
  • High-power LED is a kind of high-brightness LED.
  • Single high-power LED has higher power and brightness than low-power LED. Because LED itself has high brightness, low operating voltage, low power consumption, no pollution, small size. The outstanding advantages of long life, long life, impact resistance and stable performance have gradually led to the application of lighting systems, and will gradually replace the widely used incandescent lamps.
  • LEDs for illumination are more expensive.
  • the price of several LEDs can be comparable to the price of an incandescent lamp.
  • the price of high-power LEDs used in lighting fixtures is higher.
  • the group of lamp heads usually includes dozens or even hundreds of LEDs. Therefore, it is more important to protect the LEDs of the LED lighting fixtures and extend the service life of the LEDs.
  • the object of the present invention is: to provide an LED intelligent dynamic control system and a control method for the above problems, which can dynamically detect changes in load and load voltage and current, and dynamically output a constant current value to achieve protection. Extend the life of LED lamps.
  • An intelligent intelligent control system for LEDs comprising a power supply unit, further comprising a central control unit, an adjustable constant current unit and a voltage and current detecting unit, an adjustable constant current unit, and a control output port and a load connection of the central control unit, and receiving central control
  • the control of the unit outputs a constant current to the load
  • the voltage and current detecting unit is connected with the control input port of the central control unit, collects the load voltage and the load current parameter, and sends the collected load parameter to the central controller for processing
  • the central control unit is connected to the power supply unit, receives and processes the load voltage and current parameters collected by the voltage and current detecting unit, and controls the adjustable constant current unit to output a constant current to the load.
  • the above central control unit includes a single chip microcomputer or any one of an FPGA and an ARM.
  • the adjustable constant current unit comprises an integrated circuit LM3401, a MOSFET tube, a Schottky diode, a resistor R4 - R5, and a capacitor and an inductor; the first pin of the integrated circuit LM3401 is connected to the source of the MOSFET tube, and the third pin passes
  • the fourth resistor R4 is connected to the control output port of the central control unit, the fourth pin is grounded through the resistor R5, the fifth pin is grounded, the sixth pin is connected to the gate of the MOSFET tube, and the seventh pin is connected
  • the drain of the MOSFET is connected and grounded through a capacitor, and the eighth pin is connected to the drain of the MOSFET via a sixth resistor R6; the source of the MOSFET is connected to the load through an inductor; the cathode of the Schottky diode is The source of the M0SFET tube is connected and the anode is grounded.
  • An LED intelligent dynamic control system further includes an alarm indicating unit connected to an output port of the central control unit for responding to an alarm message, the alarm indicating unit comprising four LED tubes.
  • An LED intelligent dynamic control system further comprises a temperature and humidity detecting unit connected to an input port of a central control unit, detecting temperature and ambient humidity parameters of the dynamic control system and the load, and transmitting the parameters to the central control unit.
  • the constant current module outputs a minimum current; step S2, gradually increasing the output current of the adjustable constant current module to the rated voltage of the load; step S3, the control system locks the output current value at this time; step S4, the control system detects the load in real time And the load current voltage changes and is dynamically adjusted.
  • the step S2 includes: Step S21, gradually increasing the output current of the adjustable constant current unit; Step S22, the voltage current detecting unit collects the voltage across the load; Step S23, determining whether the voltage across the load is the rated working voltage, if not Returning to step S21, otherwise proceeding to step S3.
  • the rated operating voltage is 12V.
  • step S4 includes the following steps: Step S41, the voltage current detecting unit collects the current of the load and the voltage across the load; Step S42, determines whether the current of the load and the voltage between the two ends exceed the limit, and if yes, an alarm indication, otherwise proceeding to the step: Step S43 , dynamically adjusting the current of the load and the voltage between the two ends; Step S44, dynamically detecting whether the load changes, if yes, returning to step S43, otherwise ending.
  • the current overrun includes an undercurrent condition with a load current of less than 6.25A and an overcurrent condition of greater than 8.75A.
  • the voltage overrun includes an undervoltage condition where the voltage across the load is less than 11V and an overvoltage condition greater than 13V.
  • the present invention can achieve the following beneficial effects by using the above technical solutions:
  • the invention dynamically processes the voltage and current values of the load and the load through microprocessor technology and real-time detection technology, and automatically adjusts dynamically according to the change condition to make the output current constant;
  • the invention comprises an alarm indicating unit consisting of four LED tubes, which can simply and intuitively display four over-limit states of over-current, under-current, over-voltage and under-voltage;
  • the invention comprises a temperature and humidity detecting unit, which can detect the working temperature and the environmental humidity, can reduce the load power when the temperature exceeds the limit, protect the load, prolong the service life of the load, and can interrupt the load work when the humidity exceeds the limit, so as to avoid the short circuit. Damage to the load and control system.
  • FIG. 1 is a schematic diagram of an LED intelligent dynamic control system of the present invention.
  • FIG. 2 is a circuit diagram of an adjustable constant current unit of the LED intelligent dynamic control system of the present invention.
  • FIG. 3 is a flow chart of the LED intelligent dynamic control method of the present invention.
  • Figure 4 is a flow chart showing the step S2 in the LED intelligent dynamic control method of the present invention.
  • Fig. 5 is a flow chart showing the step S4 in the LED intelligent dynamic control method of the present invention.
  • FIG. 6 is a schematic diagram of the intelligent dynamic control LED driving power supply of the present invention. detailed description
  • An LED intelligent dynamic control system includes a power supply unit, and further includes a central control unit, an adjustable constant current unit, and a voltage current detecting unit.
  • the adjustable constant current unit is connected to the control output port of the central control unit and the load, and is controlled by the central control unit to the load (for example, the load may include 20 groups of LED units, each group of LED units including 3 LED strings Each group consumes 300 mA) to output a constant current;
  • the voltage and current detecting unit is connected to the control input port of the central control unit, collects load voltage and load current parameters, and sends the collected load parameters to the central controller.
  • the central control unit is connected to the power supply unit, receives and processes the load voltage and current parameters collected by the voltage and current detecting unit, and controls the adjustable constant current unit to output a constant current to the load, wherein the central control unit is a system
  • the core part to achieve a variety of logic control, including microcontroller or FPGA, ARM Any of the processors and their peripheral auxiliary circuits.
  • the invention further comprises an alarm indicating unit coupled to the central control unit output port for responding to the alarm message, the alarm indicating unit comprising four LED tubes.
  • the alarm indicating unit is used to indicate an overrun working state of the load, and the overrun working state of the present invention mainly includes undervoltage ( ⁇ 11V), overvoltage (>1 3V), undercurrent ( ⁇ 6.25A), overcurrent ( > 8. 75A ) Four states, these four working states with low price, long service life and environmentally friendly LED indicating load are simple and intuitive.
  • the present invention further includes a temperature and humidity detecting unit connected to the central control unit input port, detecting the temperature and ambient humidity parameters of the constant current control system and the load, and transmitting the parameters to the central control unit.
  • the temperature and humidity detecting unit comprises a temperature sensor and a humidity sensor, and the temperature sensor is placed on the load and/or the control system for detecting the load during operation and/or controlling the temperature of the system.
  • the control system The output current is automatically adjusted to reduce the heating power, and the service life of the load (LED lamp unit) is effectively protected.
  • the supply current returns to normal.
  • the set temperature is WC, and the temperature is based on The situation is different; the humidity sensor is used to detect the humidity of the control system and/or the working environment of the load, and the ambient humidity is > 98 (here is just an example, those skilled in the art can understand that the environmental humidity conditions will change under different conditions.
  • An LED intelligent dynamic control method of the present invention includes: Step S1, initializing a control system, and configuring an adjustable constant current module to output a minimum current; in an embodiment of the present invention, the constant current is adjustable
  • the output current of the flow unit ranges from 2-10A, and the minimum current output is initially set to 2A.
  • Step S2 gradually increasing the output current of the adjustable constant current module to the voltage across the load is a rated voltage; in one embodiment of the present invention, the load of 20 sets of three strings of LEDs is used, each group consuming 300 mA, so the embodiment of the present invention When the output current value is 6A, the voltage across the load is 12V, so the rated voltage at both ends of the load is set to 12V.
  • Step S3 the control system locks the output current value at this time; the output current in one embodiment of the present invention is 6A.
  • Step S4 the control system detects load and load current voltage changes in real time and performs dynamic adjustment.
  • step S2 the detailed flowchart thereof is as shown in FIG. 4, and includes the steps:
  • Step S21 gradually increasing the output current of the adjustable constant current unit
  • Step S22 the voltage current detecting unit collects the voltage across the load
  • Step S23 determining whether the voltage across the load is a rated working voltage, if not, returning to the step
  • step S4 the detailed flowchart thereof is as shown in FIG. 5, and includes the steps:
  • Step S41 the voltage and current detecting unit collects the current of the load and the voltage across the load
  • Step S42 determining whether the current of the load and the voltage at both ends are out of limits, and if yes, an alarm indication, otherwise the steps are as follows:
  • Step S43 dynamically adjusting the current of the load and the voltage between the two ends
  • step S44 it is dynamically detected whether the load is changed, and if yes, the process returns to step S43, and otherwise ends.
  • the current overrun includes an undercurrent state in which the load current is less than 6.25A and an overcurrent state greater than 8.75A.
  • the voltage overrun includes an undervoltage state in which the voltage across the load is less than 11V and an overvoltage state greater than 13 V.
  • the invention is not limited to the specific embodiments described above.
  • the invention extends to any new feature or any new combination disclosed in this specification, as well as any novel method or process steps or any new combination disclosed.

Landscapes

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

Abstract

L'invention concerne un système de commande intelligente et dynamique de DEL et un procédé de commande. Le système comprend : une unité centrale de commande, une unité de courant constant ajustable qui est connectée à une charge et au port de sortie de commande de l'unité centrale de commande, une unité de détection de tension et de courant qui est connectée au port d'entrée de commande de l'unité centrale de commande. Le procédé comprend : étape S1, initialisation du système de commande et configuration de l'unité de courant constant ajustable pour produire le courant minimal; étape S2, augmentation progressive du courant fourni par l'unité de courant constant ajustable jusqu'à ce que la tension aux bornes de la charge soit égale à la tension nominale; étape S3, verrouillage de la valeur du courant de sortie à cet instant par le système de commande; étape S4, détection, par la système de commande, de la charge et de la variation en temps réel de la tension et du courant de la charge, et ajustement dynamique. À l'aide de microprocesseurs et de détecteurs en temps réel, l'invention traite dynamiquement la charge et la variation de la tension et du courant de la charge et effectue automatiquement un ajustement dynamique sur la base de la variation, de telle sorte que le courant de sortie est constant. Par ailleurs, l'état de fonctionnement de la charge peut être indiqué par quatre DEL.
PCT/CN2011/076454 2010-08-25 2011-06-28 Système de commande intelligente et dynamique de del, source d'alimentation et procédé de commande Ceased WO2012024978A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2010102624641A CN101909392A (zh) 2010-08-25 2010-08-25 一种led智能动态控制系统及控制方法
CN201010262464.1 2010-08-25

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CN101909392A (zh) * 2010-08-25 2010-12-08 四川省桑瑞光辉标识系统制造有限公司 一种led智能动态控制系统及控制方法
CN103124452A (zh) * 2011-11-18 2013-05-29 海洋王（东莞）照明科技有限公司 一种led驱动电路及led灯具
CN103648220A (zh) * 2013-12-23 2014-03-19 东莞市奥普特自动化科技有限公司 自动检测光源最大工作电流的控制器及其检测方法
CN106714420A (zh) * 2016-12-16 2017-05-24 上海希格玛高技术有限公司 一种控制灯管强度稳定输出的电路
CN109152153B (zh) * 2018-10-16 2020-09-22 湖北华中光电科技有限公司 一种电流可调的led驱动电路及控制方法
CN113811045B (zh) * 2020-06-11 2025-08-01 深圳光峰科技股份有限公司 一种电源及光源系统
WO2022115411A1 (fr) * 2020-11-30 2022-06-02 Hgci, Inc. Dispositif de commande embarqué pour système d'éclairage destiné à la culture en intérieur

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