WO2021223382A1 - Circuit de commande d'harmonique de bande de lampe haute-tension - Google Patents

Circuit de commande d'harmonique de bande de lampe haute-tension Download PDF

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Publication number
WO2021223382A1
WO2021223382A1 PCT/CN2020/124526 CN2020124526W WO2021223382A1 WO 2021223382 A1 WO2021223382 A1 WO 2021223382A1 CN 2020124526 W CN2020124526 W CN 2020124526W WO 2021223382 A1 WO2021223382 A1 WO 2021223382A1
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WO
WIPO (PCT)
Prior art keywords
chip
output terminal
control module
terminal
input terminal
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Application number
PCT/CN2020/124526
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English (en)
Chinese (zh)
Inventor
何志亮
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广东微观科技有限公司
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Publication of WO2021223382A1 publication Critical patent/WO2021223382A1/fr

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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]
    • H05B45/10—Controlling the intensity of the light
    • 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
    • H05B45/345—Current stabilisation; Maintaining constant current
    • 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
    • H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]

Definitions

  • the invention relates to the technical field of electronic circuits, in particular to a harmonic control circuit for high-voltage lamp belts.
  • the existing high-voltage LED light strips are directly connected to the mains (the waveform of the mains power in Figure 1) for easy operation, and the LED strips work under a pulsating DC voltage (the pulsating voltage in Figure 2).
  • the LED must be stringed close to this voltage to be convenient to use. The more LEDs in series, the higher the starting voltage and the corresponding luminous efficiency.
  • the approximate AC average value is generally used as the reference point for application, if 220V is the LED series connection Standard voltage, then the number of LEDs that need 3V is about 73 strings. This is specifically adjusted according to the LED voltage and circuit design to adjust the number of strings.
  • a harmonic control circuit for a high-voltage light strip comprising: a live wire input terminal, a neutral wire input terminal, a full-bridge rectifier module, a constant current control module, a first LED light strip module, a second LED light strip module, and a galvanic isolation control module,
  • the live wire input terminal is connected to the first input terminal of the full bridge rectifier module
  • the neutral wire input terminal is connected to the second input terminal of the full bridge rectifier module
  • the first output terminal of the full bridge rectifier module Connected to the input end of the constant current control module
  • the first LED light strip module includes a first current control module and a first LED light strip series circuit
  • the second LED light strip module includes a second LED light strip series circuit Circuit and a second current control module, the output end of the constant current control module is connected to the input end of the first current control module and the input end of the second LED light strip series circuit respectively;
  • the first current control The output end of the module is connected to the input end of the first LED light strip series circuit, the output
  • the full-bridge rectifier module includes a rectifier bridge B1, a fuse F1, and a capacitor XC.
  • the live wire input terminal is connected to the first input terminal of the rectifier bridge B1 through the fuse F1
  • the neutral wire input terminal is connected to the first input terminal of the rectifier bridge B1.
  • the capacitor XC is respectively connected to the live wire input terminal and the neutral wire input terminal
  • the first output terminal of the rectifier bridge B1 is connected to the input terminal of the constant current control module, and the rectifier bridge The second output terminal of B1 is grounded.
  • the harmonic control circuit of the high-voltage light strip further includes a resistor RV, one end of the resistor RV is connected to the first output end of the rectifier bridge B1, and the other end of the resistor RV is grounded.
  • the constant current control module includes a chip U1, a resistor R1, and a resistor RX1.
  • the input terminal VD of the chip U1 is connected to the first output terminal of the rectifier bridge B1, and the first output terminal CS of the chip U1 passes through the resistor.
  • R1 is connected to the second output terminal VS of the chip U1 and forms the output terminal of the chip U1 with the second output terminal VS of the chip U1 as a fulcrum; one end of the resistor RX1 is connected to the input terminal VD of the chip U1, and the other end of the resistor RX1 is connected to the chip
  • the output terminal of U1 is connected, and the output terminal of the chip U1 is respectively connected with the input terminal of the first current control module and the input terminal of the second LED strip series circuit.
  • the first current control module includes a chip U2 and a resistor R3.
  • the input terminal VD of the chip U2 is connected to the output terminal of the chip U1, and the first output terminal CS of the chip U2 is connected to the chip U2 through the resistor R3.
  • the second output terminal VS is connected and forms the output terminal of the chip U2 with the second output terminal VS of the chip U2 as a fulcrum; the output terminal of the chip U2 is connected with the input terminal of the first LED strip series circuit.
  • the second current control module includes a chip U3 and a resistor R4, the input terminal VD of the chip U3 is connected to the output terminal of the second LED light strip series circuit, and the first output terminal CS of the chip U3
  • the second output terminal VS of the chip U3 is connected through the resistor R4 and the second output terminal VS of the chip U2 is used as a fulcrum to form the output terminal of the chip U2, and the output terminal of the chip U2 is grounded.
  • the output terminal is connected to the first output terminal CS of the chip U3.
  • the galvanic isolation control module includes a resistor R2 and a Zener diode DZ.
  • the resistor R2 is connected in parallel with the Zener diode DZ, and the anode terminal of the Zener diode DZ is used as the output terminal of the galvanic isolation control module for stability.
  • the cathode terminal of the piezo diode DZ is the input terminal of the galvanic isolation control module, the cathode terminal of the zener diode DZ is connected to the first output terminal CS of the chip U2, and the anode terminal of the zener diode DZ is connected to the input terminal VD of the chip U3.
  • the first LED light strip series circuit includes a plurality of series LED wicks, wherein the anode terminal of the first LED light wick is the input terminal of the first LED light strip series circuit, and the last LED The cathode end of the wick is the output end of the series circuit of the first LED strip.
  • the second LED light strip series circuit includes a plurality of series LED wicks, wherein the anode terminal of the first LED light wick is the input terminal of the second LED light strip series circuit, and the last LED The cathode end of the wick is the output end of the series circuit of the second LED strip.
  • the harmonic control circuit of the high-voltage lamp strip further includes a resistor RX2, one end of the resistor RX2 is connected to the cathode end of the Zener diode DZ, and the other end of the resistor RX2 is grounded.
  • the above-mentioned harmonic control circuit of the high-voltage lamp belt through the constant current control module, the first current control module and the second current control module, connects the first LED lamp belt in series when the mains voltage is boosted from 0V to the peak value of 314V
  • the current changes of the circuit and the second LED light strip series circuit completely follow the voltage change, which excellently controls the harmonic distortion of the first LED light strip series circuit and the second LED light strip series circuit, and solves the existing Insufficient application of LED light strips, the external bulky power supply can be removed, and the LED light strips can be directly connected to the mains for use, reducing the difficulty of installation, and well conforming to the space shape; by not adapting the power of the external drive, and can Integrate various functions of the drive power supply, such as thyristor dimming, 100-277V full voltage input drive, etc.
  • Figure 1 is a schematic diagram of the mains voltage waveform.
  • Figure 2 is a schematic diagram of the waveform of the LED light strip working under a pulsating DC voltage.
  • Fig. 3 is a schematic diagram of the voltage waveform of the existing high-voltage lamp belt working at the working current.
  • Fig. 4 is a schematic diagram of the circuit principle of a harmonic control circuit for a high-voltage lamp belt in an embodiment.
  • Fig. 5 is a schematic diagram of the equivalent circuit principle of the harmonic control circuit of the high-voltage lamp belt in an embodiment of Fig. 4 in operation.
  • FIG. 6 is a schematic diagram of the equivalent circuit principle of the harmonic control circuit of the high-voltage lamp belt in another embodiment of FIG. 4 when it is working.
  • Fig. 7 is a schematic diagram of a voltage waveform when the harmonic control circuit of a high-voltage lamp belt is working in an embodiment.
  • the present invention provides a high-voltage lamp belt harmonic control circuit 10, the high-voltage lamp belt harmonic control circuit 10 includes: a live wire input terminal L, a neutral line input terminal N, a full bridge rectifier module 100, constant current The control module 200, the first LED light strip module, the second LED light strip module, and the galvanic isolation control module 600, the live wire input terminal L is connected to the first input terminal of the full bridge rectifier module 100, and the neutral wire input terminal N is connected to the full bridge rectifier module.
  • the second input end of the module 100 is connected, and the first output end of the full-bridge rectifier module 100 is connected to the input end of the constant current control module 200;
  • the first LED light strip module includes a first current control module 310 and a first LED light strip in series Circuit 320
  • the second LED light strip module includes a second LED light strip series circuit 410 and a second current control module 420, the output end of the constant current control module 200 and the input end of the first current control module 310 and the second LED light
  • the input end of the series circuit 410 is connected;
  • the output end of the first current control module 310 is connected to the input end of the first LED light strip series circuit 320, and the output end of the second LED light strip series circuit 410 is connected to the second current control module 420
  • the input end of the first LED light strip series circuit 320 and the output end of the second current control module 420 are grounded;
  • the input end of the galvanic isolation control module 600 is connected to the output end of the first current control module 310, which is gal
  • the above-mentioned harmonic control circuit 10 of the high-voltage lamp belt through the constant current control module 200, the first current control module 310, and the second current control module 420, makes the first The current changes of the LED light strip series circuit 320 and the second LED light strip series circuit 410 completely follow the voltage change, which excellently controls the first LED light strip series circuit 320 and the second LED light strip series circuit 410 Harmonic distortion solves the shortcomings of the existing LED light strip applications.
  • the external bulky power supply can be removed, and the LED light strip can be directly connected to the mains for use, reducing the installation difficulty, and well conforming to the space shape; by not adapting External drive power, and can integrate various functions of drive power, such as thyristor dimming, 100-277V full voltage input drive, etc.
  • the full-bridge rectifier module 100 includes a rectifier bridge B1, a fuse F1, and a capacitor XC.
  • the live wire input terminal L is connected to the first input terminal of the rectifier bridge B1 through the fuse F1.
  • the input terminal N is connected to the second input terminal of the rectifier bridge B1, the capacitor XC is respectively connected to the live line input terminal L and the neutral line input terminal N, and the first output terminal of the rectifier bridge B1 is connected to the input terminal of the constant current control module 200.
  • the second output terminal of the bridge B1 is grounded.
  • the constant current control module 200 includes a chip U1, a resistor R1, and a resistor RX1.
  • the input terminal VD of the chip U1 is connected to the first output terminal of the rectifier bridge B1, and the first output terminal CS of the chip U1 is connected to the second output of the chip U1 through the resistor R1.
  • the terminal VS is connected and the second output terminal VS of the chip U1 is used as the fulcrum to form the output terminal of the chip U1; one end of the resistor RX1 is connected to the input terminal VD of the chip U1, the other end of the resistor RX1 is connected to the output terminal of the chip U1, and the chip U1
  • the output terminals of are respectively connected to the input terminal of the first current control module 310 and the input terminal of the second LED strip series circuit 410.
  • the first current control module 310 includes a chip U2 and a resistor R3.
  • the input terminal VD of the chip U2 is connected to the output terminal of the chip U1, and the first output terminal CS of the chip U2 is connected to the second output terminal VS of the chip U2 through the resistor R3.
  • the second output terminal VS of the chip U2 is the output terminal of the fulcrum forming chip U2; the output terminal of the chip U2 is connected to the input terminal of the first LED strip series circuit 320.
  • the second current control module 420 includes a chip U3 and a resistor R4.
  • the input terminal VD of the chip U3 is connected to the output terminal of the second LED strip series circuit 410.
  • the first output terminal CS of the chip U3 is connected to the second output terminal CS of the chip U3 through the resistor R4.
  • the output terminal VS is connected with the second output terminal VS of the chip U2 as a fulcrum to form the output terminal of the chip U2, and the output terminal of the chip U2 is grounded, the output terminal of the first LED light strip series circuit 320 and the first output terminal of the chip U3 CS connection.
  • the galvanic isolation control module 600 includes a resistor R2 and a Zener diode DZ.
  • the resistor R2 is connected in parallel with the Zener diode DZ.
  • the cathode terminal of the Zener diode DZ is connected to the first output terminal CS of the chip U2, and the anode terminal of the Zener diode DZ is connected to the input terminal VD of the chip U3.
  • the first LED light strip series circuit 320 includes a number of series LED wicks, where the anode end of the first LED light wick is the input end of the first LED light strip series circuit 320, and the cathode end of the last LED light wick is the first.
  • the second LED light strip series circuit 410 includes a plurality of series connected LED wicks, wherein the anode end of the first LED light wick is the input end of the second LED light strip series circuit 410, and the cathode end of the last LED light wick is the second The output terminal of the series circuit 410 of the LED strip.
  • the harmonic control circuit of the high-voltage light strip further includes a resistor RV, one end of the resistor RV is connected to the first output end of the rectifier bridge B1, and the other end of the resistor RV is grounded.
  • the harmonic control circuit of the high-voltage lamp strip further includes a resistor RX2, one end of the resistor RX2 is connected to the cathode end of the Zener diode DZ, and the other end of the resistor RX2 is grounded.
  • the chip U1, the chip U2 and the chip U3 jointly control the two strings of LEDs in the circuit to work in series.
  • the DZ is forward conducting, and the two strings of LEDs are connected in series, as shown in the equivalent circuit. 6 shown.
  • R2 is not working due to DZ forward conduction.
  • the chip U1 is designed to ensure that the chip U1, the chip U2, and the chip U3 function as a linear constant current when the voltage fluctuates over 314V. If the voltage is very stable, we can also replace it with a conventional resistor to limit the voltage. The principle is the same.
  • the design of RX1 and RX2 is to ensure that the circuit works well in parallel and series conversion.
  • the second is that the voltage across the IC will increase when the chip U1 and chip U3 are constant current.
  • RX1 and RX2 Helping the IC to share the heat can also form a current to reduce harmonics; in this way, the currents in the loop merge to form a current waveform as shown in Figure 7.
  • the current changes completely follow the voltage changes, and harmonic distortion is excellently controlled.
  • the present invention solves the shortcomings of the existing LED light strips by controlling the harmonic distortion of the series circuit, and can eliminate the external bulky power supply and eliminate the installation of the external power supply. Save labor cost, directly connect the LED light strip to the mains, reduce the installation difficulty, and fit the space shape well; by not adapting the power of the external drive, and can integrate the drive power of various functions, such as controllable Silicon dimming, 100-277V full voltage input drive, etc.

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

Abstract

Circuit de commande d'harmonique de bande de lampe haute-tension. Le circuit de commande d'harmonique de bande de lampe haute-tension comprend : une extrémité d'entrée de fil sous tension, une extrémité d'entrée de fil neutre, un module de redressement en pont complet, un module de commande à courant constant, un premier module de bande de lampe à DEL, un second module de bande de lampe à DEL, et un module de commande d'isolation de courant ; l'extrémité d'entrée de fil sous tension est connectée à une première extrémité d'entrée du module de redressement en pont complet, l'extrémité d'entrée de fil neutre est connectée à une seconde extrémité d'entrée du module de redressement en pont complet, et une première extrémité de sortie du module de redressement en pont complet est connectée à une extrémité d'entrée du module de commande à courant constant ; le premier module de bande de lampe à DEL comprend un premier module de commande de courant et un premier circuit série de bandes de lampe à DEL, et le second module de bande de lampe à DEL comprend un second circuit série de bandes de lampe à DEL et un second module de commande de courant. Selon le circuit de commande d'harmonique de bande de lampe haute-tension, la distorsion d'harmonique du premier circuit série de bandes de lampe à DEL et du second circuit en série de bandes de lampe à DEL est régulée, des défauts d'application des bandes de lampe à DEL existantes sont résolus, une source d'énergie de grande taille externe peut être omise, la difficulté d'installation est réduite, et la présente invention se conforme bien à la mise en forme d'espace.
PCT/CN2020/124526 2020-05-06 2020-10-28 Circuit de commande d'harmonique de bande de lampe haute-tension WO2021223382A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202020722096.3 2020-05-06
CN202020722096.3U CN212910138U (zh) 2020-05-06 2020-05-06 高压灯带谐波控制电路

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WO2021223382A1 true WO2021223382A1 (fr) 2021-11-11

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104780646A (zh) * 2014-01-15 2015-07-15 四川新力光源股份有限公司 一种支持可控硅调光的led驱动电路
CN105050268A (zh) * 2015-07-30 2015-11-11 万辽辽 全集成led驱动电路
CN105792474A (zh) * 2015-11-23 2016-07-20 厦门兴恒隆股份有限公司 一种用于led电源的宽电压交流驱动电路
CN107172765A (zh) * 2017-07-12 2017-09-15 谷沛耕 Ac输入高功率因数无频闪的led驱动电路
US20200100348A1 (en) * 2018-07-16 2020-03-26 Jiaxing Super Lighting Electric Appliance Co., Ltd Led lighting system, apparatus, and dimming method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104780646A (zh) * 2014-01-15 2015-07-15 四川新力光源股份有限公司 一种支持可控硅调光的led驱动电路
CN105050268A (zh) * 2015-07-30 2015-11-11 万辽辽 全集成led驱动电路
CN105792474A (zh) * 2015-11-23 2016-07-20 厦门兴恒隆股份有限公司 一种用于led电源的宽电压交流驱动电路
CN107172765A (zh) * 2017-07-12 2017-09-15 谷沛耕 Ac输入高功率因数无频闪的led驱动电路
US20200100348A1 (en) * 2018-07-16 2020-03-26 Jiaxing Super Lighting Electric Appliance Co., Ltd Led lighting system, apparatus, and dimming method

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Publication number Publication date
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