WO2023060411A1 - Système de projecteur pour salle anéchoïque ou salle blindée - Google Patents

Système de projecteur pour salle anéchoïque ou salle blindée Download PDF

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Publication number
WO2023060411A1
WO2023060411A1 PCT/CN2021/123149 CN2021123149W WO2023060411A1 WO 2023060411 A1 WO2023060411 A1 WO 2023060411A1 CN 2021123149 W CN2021123149 W CN 2021123149W WO 2023060411 A1 WO2023060411 A1 WO 2023060411A1
Authority
WO
WIPO (PCT)
Prior art keywords
capacitor
inductor
electrically connected
led lamp
pin
Prior art date
Application number
PCT/CN2021/123149
Other languages
English (en)
Chinese (zh)
Inventor
陈巧
陈�全
Original Assignee
深圳技术大学
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 深圳技术大学 filed Critical 深圳技术大学
Priority to PCT/CN2021/123149 priority Critical patent/WO2023060411A1/fr
Publication of WO2023060411A1 publication Critical patent/WO2023060411A1/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]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current

Definitions

  • the utility model relates to the technical field of lamps, in particular to a projection lamp system used in an anechoic room or a shielding room.
  • the lighting equipment in the anechoic room or shielding room generally adopts halogen lamps, while the radiation disturbance test in the electromagnetic compatibility test laboratory uses the national standard level 5 or military standard level test, which requires the bottom of the anechoic room and shielding room
  • the noise is very low, and ordinary halogen lamps can hardly meet the noise floor requirements; and the lamps are installed on the top of the darkroom, and most of the halogen lamps are high-power lamps, which generate a lot of heat, consume a lot of energy, have a short service life, and often need to be replaced, which leads to maintenance
  • the frequency is high, and the potential safety hazard is great.
  • the main purpose of this utility model is to provide a floodlight system for an anechoic room or shielding room, aiming to solve the problem that the lighting equipment in the anechoic room or shielding room in the prior art cannot meet the noise floor requirements, and the maintenance frequency is high, Technical issues with major security risks.
  • the utility model provides a floodlight system for an anechoic room or a shielding room, including: an AC power supply, an enhanced differential mode filter circuit, a drive circuit and an LED lamp board; the enhanced differential mode filter The first end of the circuit is connected to the power supply, the second end is connected to the first end of the driving circuit, and the second end of the driving circuit is connected to the LED light board; the driving circuit includes: a resistor, a first capacitor, a second The second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the first inductor, the second inductor, and a rectifier bridge; the first end of the resistor and the AC power supply pass through the strengthened
  • the live wire end of the type differential mode filter circuit is electrically connected, and the second end is electrically connected with the first pin of the first inductance and the first end of the first capacitor; the first capacitor, the second end of the first inductance The pin is electrically connected to the neutral terminal of the AC power supply through the enhanced differential
  • the first end of the fourth capacitor is electrically connected to the first pin of the second inductor; the third pin of the second inductor is connected to the fifth inductor, the sixth inductor, the seventh inductor, the The first end of the LED lamp board is electrically connected, and the fourth pin of the second inductor is electrically connected to the fifth inductor, the sixth inductor, the seventh inductor, and the second end of the LED lamp board. .
  • the capacitances of the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor, and the seventh capacitor are respectively 0.68 uF, 0.1uF, 4 ⁇ 14uF, 0.1uF, 220uF, 104uF, 103uF.
  • the first inductor is a UUF inductor with an inductance greater than 200mH;
  • the second inductor is a common-mode amorphous inductor with an inductance greater than 300mH.
  • the magnetic ring of the second inductor is an amorphous magnetic ring
  • the first inductor and the second inductor are covered with a magnetic field shielding film
  • the first inductor and the second inductor are grounded.
  • the magnetic field shielding film is aluminum foil.
  • the LED lamp board is composed of 50-60 strings of LED lamp beads; the DC voltage of the LED lamp beads is 160V ⁇ 180V.
  • the third capacitor is 4uF, and the LED lamp power of the rectifier bridge is 30W, or, the third capacitor is 8uF, and the LED lamp power of the rectifier bridge is 50W, or, the third capacitor is 14uF, and the LED lamp power of the rectifier bridge is 75W.
  • the enhanced differential mode filter circuit is a differential mode filter circuit including an electromagnetic compatibility filter.
  • the utility model provides a projecting light system used in an anechoic room or a shielding room.
  • the beneficial effect is that it can convert alternating current, so that the power supply has the characteristics of constant current and linearity, so that the basic requirements for driving LED lights and the low background noise of the dark room can be achieved.
  • Perfect combination under the characteristic of constant current, even if the external voltage is as high as 250V or even 300V, the LED lamp will not burn out due to overcurrent, because this is a high internal resistance power supply, the internal resistance comes from capacitive reactance, and it does not generate heat. Thereby reducing energy consumption, increasing the service life, without frequent replacement, thus reducing the maintenance frequency of lighting equipment and reducing safety hazards.
  • Fig. 1 is a schematic block diagram of the structure of a floodlight system in an anechoic room or shielded room;
  • Figure 2 is a circuit diagram of the drive circuit.
  • Figure 1 is a floodlight system used in an anechoic room or shielded room, including: AC power supply 1, enhanced differential mode filter circuit 2, drive circuit 3 and LED lamp board 4; among them, the enhanced differential mode
  • the first end of the filter circuit 2 is connected to the power supply, the second end is connected to the first end of the driving circuit 3 , and the second end of the driving circuit 3 is connected to the LED lamp board 4 .
  • the drive circuit 3 includes: a resistor R, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a An inductor L1, a second inductor L2 and a rectifier bridge D; the first end of the resistor R is electrically connected to the live wire end L of the AC power supply 1 through the enhanced differential mode filter circuit 2, and the second end is connected to the first lead of the first inductor L1 pin a, the first end of the first capacitor C1 is electrically connected; the first capacitor C1, the second pin b of the first inductor L1 is electrically connected to the neutral terminal N of the AC power supply 1 through the enhanced differential mode filter circuit 2; the second The third pin c of an inductor L1 is electrically connected to the first end of the second inductor L2 and the first AC end of the rectifier bridge D, and the fourth pin d of the first inductor L1 is connected to the second end
  • the alternating current can be converted, so that the power supply has constant current and linear characteristics, thus perfectly combining the basic requirements of LED lamp driving with the low noise floor of the dark room , under the characteristics of constant current, even if the external voltage is as high as 250V or even 300V, the LED lamp will not burn out due to overcurrent, because this is a high internal resistance power supply, the internal resistance comes from capacitive reactance, and does not generate heat, thereby reducing Energy consumption is increased, the service life is increased, and frequent replacement is not required, thus reducing the maintenance frequency of lighting equipment and reducing safety hazards.
  • the capacitances of the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, and the seventh capacitor C7 are 0.68uF and 0.1uF respectively , 4 ⁇ 14 uF, 0.1 uF, 220 uF, 104 uF, 103 uF.
  • the withstand voltage value of the third capacitor C3 is 400V, so that the AC power source 1 can be stepped down to perform bridge rectification.
  • the third capacitor C3 may be 4uF, and the LED lamp power of the rectifier bridge D is 30W.
  • the third capacitor C3 can also be 8uF, and the LED lamp power of the rectifier bridge D is 50W.
  • the third capacitor C3 can also be 14uF, and the LED lamp power of the rectifier bridge D is 75W.
  • the first inductor L1 is a UUF inductor with an inductance greater than 200mH; the second inductor L2 is a common mode amorphous inductor with an inductance greater than 300mH.
  • the LED lamp board 4 is composed of 50-60 strings of LED lamp beads; the DC voltage of the LED lamp beads is 160V ⁇ 180V.
  • the LED light board 4 arranged in this way can achieve the effect of a small overall current, so that the volumes of the first inductor L1 and the second inductor L2 are not easily saturated even when they are small.
  • the magnetic ring of the second inductor L2 is an amorphous magnetic ring
  • the first inductor L1 and the second inductor L2 are covered with a magnetic field shielding film
  • the first inductor L1 and the second inductor L2 are grounded.
  • the magnetic field shielding film is aluminum foil.
  • the amorphous magnetic ring is a magnetic ring made by VAC, and the amorphous magnetic ring is surrounded by a common-mode inductance with an inductance of 300mH, which is the second inductance L2 of this embodiment.
  • a common-mode inductance can satisfy unsaturated conditions.
  • the aluminum foil can better block the magnetic field. Since the type rectification will generate electromagnetic oscillations with a frequency in the range of hundreds of Hz to 30 MHz during the switching cycle, in general, this oscillation interference is far below the limits of various civil uses, but for the background noise of EMC anechoic rooms. Not allowed, using aluminum foil as a magnetic field shielding film can well suppress this low-frequency radiation.
  • the enhanced differential mode filter circuit 2 is a differential mode filter circuit including an electromagnetic compatibility filter.

Landscapes

  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

L'invention concerne un système de projecteur pour une salle anéchoïque ou une salle blindée, comprenant : une alimentation électrique en courant alternatif (1), un circuit de filtre à mode différentiel amélioré (2), un circuit d'attaque (3), et une carte de lumière à DEL (4). Le circuit de filtre à mode différentiel amélioré (2) a une première extrémité connectée à l'alimentation électrique et une seconde extrémité connectée à une première extrémité du circuit d'attaque (3), et une seconde extrémité du circuit d'attaque (3) est connectée à la carte de lumière à DEL (4). Le circuit d'attaque (3) comprend : une résistance (R), un premier condensateur (C1), un deuxième condensateur (C2), un troisième condensateur (C3), un quatrième condensateur (C4), un cinquième condensateur (C5), un sixième condensateur (C6), un septième condensateur (C7), un premier inducteur (L1), un second inducteur (L1), et un pont redresseur (D). Le système peut réduire la consommation d'énergie, augmenter la durée de vie d'un dispositif d'éclairage, et éliminer la nécessité d'un remplacement fréquent de dispositifs d'éclairage, ce qui permet d'abaisser la fréquence de maintenance de dispositifs d'éclairage et de réduire les risques de sécurité potentiels.
PCT/CN2021/123149 2021-10-11 2021-10-11 Système de projecteur pour salle anéchoïque ou salle blindée WO2023060411A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/123149 WO2023060411A1 (fr) 2021-10-11 2021-10-11 Système de projecteur pour salle anéchoïque ou salle blindée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/123149 WO2023060411A1 (fr) 2021-10-11 2021-10-11 Système de projecteur pour salle anéchoïque ou salle blindée

Publications (1)

Publication Number Publication Date
WO2023060411A1 true WO2023060411A1 (fr) 2023-04-20

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PCT/CN2021/123149 WO2023060411A1 (fr) 2021-10-11 2021-10-11 Système de projecteur pour salle anéchoïque ou salle blindée

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040264220A1 (en) * 2003-06-25 2004-12-30 Michael Briere Emi filter circuit
CN101707435A (zh) * 2009-05-13 2010-05-12 海洋王照明科技股份有限公司 一种emi滤波电路及使用该滤波电路的led电源驱动电路
CN201928483U (zh) * 2010-12-06 2011-08-10 汤德明 照明led恒流驱动电路
CN202425146U (zh) * 2012-01-06 2012-09-05 广州市隆都电子有限公司 一种led照明装置驱动电路
CN205754955U (zh) * 2016-05-19 2016-11-30 江苏明钰新能源有限公司 一种抗电磁干扰的led驱动电路
CN109058799A (zh) * 2018-10-25 2018-12-21 深圳市虹晟源光电科技有限公司 一种led灯条
CN212323992U (zh) * 2020-05-09 2021-01-08 青岛鼎信通讯股份有限公司 一种用于电力行业产品的无y电容开关电源电路
CN214315049U (zh) * 2020-12-29 2021-09-28 珠海美光原科技股份有限公司 一种植物补光灯用大功率交错连续模式pfc电路

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040264220A1 (en) * 2003-06-25 2004-12-30 Michael Briere Emi filter circuit
CN101707435A (zh) * 2009-05-13 2010-05-12 海洋王照明科技股份有限公司 一种emi滤波电路及使用该滤波电路的led电源驱动电路
CN201928483U (zh) * 2010-12-06 2011-08-10 汤德明 照明led恒流驱动电路
CN202425146U (zh) * 2012-01-06 2012-09-05 广州市隆都电子有限公司 一种led照明装置驱动电路
CN205754955U (zh) * 2016-05-19 2016-11-30 江苏明钰新能源有限公司 一种抗电磁干扰的led驱动电路
CN109058799A (zh) * 2018-10-25 2018-12-21 深圳市虹晟源光电科技有限公司 一种led灯条
CN212323992U (zh) * 2020-05-09 2021-01-08 青岛鼎信通讯股份有限公司 一种用于电力行业产品的无y电容开关电源电路
CN214315049U (zh) * 2020-12-29 2021-09-28 珠海美光原科技股份有限公司 一种植物补光灯用大功率交错连续模式pfc电路

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