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WO2020111315A1 - Convertisseur de gradation de del de type isolant - Google Patents

Convertisseur de gradation de del de type isolant Download PDF

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Publication number
WO2020111315A1
WO2020111315A1 PCT/KR2018/014874 KR2018014874W WO2020111315A1 WO 2020111315 A1 WO2020111315 A1 WO 2020111315A1 KR 2018014874 W KR2018014874 W KR 2018014874W WO 2020111315 A1 WO2020111315 A1 WO 2020111315A1
Authority
WO
WIPO (PCT)
Prior art keywords
transformer
switching
unit
impedance matching
diode
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/KR2018/014874
Other languages
English (en)
Korean (ko)
Inventor
김용성
서봉완
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.)
Ileds Co Ltd
Original Assignee
Ileds 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 Ileds Co Ltd filed Critical Ileds Co Ltd
Priority to PCT/KR2018/014874 priority Critical patent/WO2020111315A1/fr
Publication of WO2020111315A1 publication Critical patent/WO2020111315A1/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
    • H05B44/00—Circuit arrangements for operating electroluminescent light sources

Definitions

  • LEDs have high illumination, low power consumption, semi-permanent lifespan, and have various advantages such as eco-friendly and emotional lighting.
  • the converter is a power supply that converts and supplies commercial power to the rated power required for lighting.
  • the converter for LEDs generally includes a PWM unit for switching a transformer and a transformer in a PWM method to convert commercial power to rated power, and may further include an oscillating unit for improving power factor of commercial power while energy efficiency is emphasized.
  • a converter with a dimming function capable of adjusting the brightness of the LED light that is, adjusting the power consumption of the LED, has been released according to ambient light or user's selection.
  • dimming may be performed at the front end or the rear end based on the transformer, and each has advantages and disadvantages.
  • the suppressor since the voltage that the suppressor can withstand is limited, the suppressor is shorted by an abnormal oscillation accompanied by a voltage above the limiting voltage of the suppressor, and as a result, the input voltage (for example, 350V) remains the converter circuit. This results in destruction of PFC ICs for power factor improvement.
  • An object of the present invention is to provide an LED dimming converter that can stably operate against an abnormal oscillation.
  • the rectifying unit for rectifying the input power; A transformer for transforming the pulsating power output from the rectifying unit; A clamping part connected in parallel to the primary side of the transformer for impedance matching with the transformer; And a switching unit switching a voltage applied to the primary side of the transformer according to the control signal of the oscillating unit, wherein the clamping unit comprises: an impedance matching filter; An overvoltage suppressor diode connected in series in the forward direction to the impedance matching filter; And a switching diode connected in the reverse direction to the overvoltage suppressor diode.
  • the impedance matching filter may be composed of a resistor or a resistor and a capacitor connected in parallel.
  • the impedance matching filter can be used to provide a stable dimming operation against the abnormal oscillation and prevent circuit breakage.
  • FIG. 1 is a circuit diagram showing an LED dimming converter according to the present invention.
  • FIG. 1 is a circuit diagram showing an LED dimming converter according to the present invention.
  • the ED dimming converter ultimately receives the commercial power Vin and outputs Vout, and includes a rectifying unit 110, a clamping unit 120, an oscillating unit 130, a switching unit 150, and a transformer 140.
  • the rectifying unit 110 is composed of bridge diodes D1 to D4, and performs full-wave rectification of commercial input power.
  • the clamping unit 120 performs an impedance matching function with the transformer 140, and a transient voltage supressor diode, 124, TVS connected in series in the forward direction to the impedance matching filter 121 and the impedance matching filter 121 Diode) and the switching diode 126 connected in reverse direction to the overvoltage suppressor diode 124 are configured in series.
  • the impedance matching filter 121 may be composed of a resistor 122 or a resistor 122 and a capacitor 123 connected in parallel.
  • the node 111 outputting the “rectified” input voltage Vinr of the rectifying unit 110 includes a resistor 122 and one end of the capacitor 123 and a transformer ( 140) is connected to one terminal of the primary winding P.
  • the other end of the resistor 122 and the capacitor 123 connected in parallel is connected to the positive electrode of the TVS diode 124, and the negative electrode of the TVS diode 124 is connected to the negative electrode of the switching diode 126.
  • the TVS diode 124 performs an overvoltage blocking function
  • the switching diode 126 performs a fast recovery function
  • the other terminal of the primary winding P of the transformer 140 is connected to the anode of the switching diode 126 at the node 127 and the drain of the switching FET 150.
  • the oscillation unit 130 is composed of a power factor correction IC to provide a square wave switching signal to the switching unit 150.
  • the switching unit 150 may be composed of a switching FET, gate-controlled by a square wave output signal from the oscillator 130, and the drain as described above, the anode and the transformer 140 of the switching diode 126 at the node 127 ) Is connected to the other terminal of the primary winding P, and the source is connected to ground.
  • the transformer 140 converts it to a predetermined voltage ratio by the number of turns and outputs it.
  • the switching FET 150 is turned on so that the abnormal oscillation voltage generated in the transformer 140 is the switching FET 150. Passes through and exits to ground.
  • the switching FET 150 when a low signal is applied to the gate of the switching FET 150 by the oscillation unit 130, the switching FET 150 is turned off, and the abnormal oscillation voltage generated in the transformer 140 is the switching diode 126 ) Is applied to the TVS diode 124.
  • the circuit may be destroyed by applying the high voltage input power to the internal circuit including the oscillator 130 as it is.
  • the impedance matching filter 121 connected in series to the TVS diode 124 covers the abnormal oscillation voltage to prevent the TVS diode 124 from being shorted.
  • the present invention in manufacturing the LED dimming converter, by performing dimming at the front end of the transformer, the existing dimming-related device can be used as it is, and the circuit is easy to implement. It has the advantage of being able to prevent the destruction of the present invention, the present invention is a technology that can be widely used in the field of LED lighting and electrical and electronic industry to realize its practical and economical value.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention concerne un convertisseur de gradation de DEL de type isolant comprenant : une unité de redressement pour redresser une puissance d'entrée ; un transformateur pour transformer une puissance de courant pulsatoire délivrée en sortie par l'unité de redressement ; une unité de fixation connectée en parallèle à un côté primaire du transformateur pour effectuer une adaptation d'impédance avec le transformateur ; et une unité de commutation pour commuter une tension appliquée au côté primaire du transformateur en fonction d'un signal de commande d'une unité d'oscillation, l'unité de fixation comprenant : un filtre d'adaptation d'impédance connecté à une borne de sortie de l'unité de redressement ; une diode de suppression de tension transitoire connectée en série avec le filtre d'adaptation d'impédance dans une direction avant ; et une diode de commutation, dont une électrode positive est connectée au côté primaire du transformateur de telle sorte que la diode de commutation est connectée en série avec la diode de suppression de tension transitoire dans une direction inverse.
PCT/KR2018/014874 2018-11-28 2018-11-28 Convertisseur de gradation de del de type isolant Ceased WO2020111315A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2018/014874 WO2020111315A1 (fr) 2018-11-28 2018-11-28 Convertisseur de gradation de del de type isolant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2018/014874 WO2020111315A1 (fr) 2018-11-28 2018-11-28 Convertisseur de gradation de del de type isolant

Publications (1)

Publication Number Publication Date
WO2020111315A1 true WO2020111315A1 (fr) 2020-06-04

Family

ID=70853290

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/014874 Ceased WO2020111315A1 (fr) 2018-11-28 2018-11-28 Convertisseur de gradation de del de type isolant

Country Status (1)

Country Link
WO (1) WO2020111315A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110012530A1 (en) * 2009-07-14 2011-01-20 Iwatt Inc. Adaptive dimmer detection and control for led lamp
KR20110049682A (ko) * 2009-11-03 2011-05-12 인터실 아메리카스 인코포레이티드 개방 루프 디밍 제어를 갖는 ｌｅｄ 드라이버
KR20110095639A (ko) * 2010-02-19 2011-08-25 주식회사 휴먼라이트 엘이디 조명등 모듈
WO2012115425A2 (fr) * 2011-02-22 2012-08-30 주식회사 싸인텔레콤 Appareil intelligent de conversion de la gradation de l'intensité lumineuse
KR101681090B1 (ko) * 2014-09-05 2016-11-30 주식회사 아이레즈 절연타입 led 디밍 컨버터

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110012530A1 (en) * 2009-07-14 2011-01-20 Iwatt Inc. Adaptive dimmer detection and control for led lamp
KR20110049682A (ko) * 2009-11-03 2011-05-12 인터실 아메리카스 인코포레이티드 개방 루프 디밍 제어를 갖는 ｌｅｄ 드라이버
KR20110095639A (ko) * 2010-02-19 2011-08-25 주식회사 휴먼라이트 엘이디 조명등 모듈
WO2012115425A2 (fr) * 2011-02-22 2012-08-30 주식회사 싸인텔레콤 Appareil intelligent de conversion de la gradation de l'intensité lumineuse
KR101681090B1 (ko) * 2014-09-05 2016-11-30 주식회사 아이레즈 절연타입 led 디밍 컨버터

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