WO2020111312A1 - Rcr 직렬 회로를 이용한 임피던스 매칭 필터 및 이를 이용한 절연타입 led 디밍 컨버터 - Google Patents
Rcr 직렬 회로를 이용한 임피던스 매칭 필터 및 이를 이용한 절연타입 led 디밍 컨버터 Download PDFInfo
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- WO2020111312A1 WO2020111312A1 PCT/KR2018/014857 KR2018014857W WO2020111312A1 WO 2020111312 A1 WO2020111312 A1 WO 2020111312A1 KR 2018014857 W KR2018014857 W KR 2018014857W WO 2020111312 A1 WO2020111312 A1 WO 2020111312A1
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- transformer
- impedance matching
- matching filter
- series
- rcr
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
-
- 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
- the present invention relates to an impedance matching filter using an RCR series circuit and an isolated type LED dimming converter using the same, by connecting the RCR series circuit in parallel between the secondary output terminal of the transformer and the input terminal of the AC rectifying unit, thereby forming a left and right symmetrical resistance and Impedance matching filter using RCR series circuit that can significantly reduce the phase difference by changing the phase of noise to the same phase by correcting the impedance difference between the secondary side of the transformer and the alternating current rectifier through a capacitor structure interposed therebetween and insulation using the same Type LED dimming converter.
- 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.
- phase of the noise is variable at regular intervals due to the nature of the alternating current (input), 800v in the maximum positive direction, sound
- the phase of the noise is variable with a voltage magnitude of 800v in the direction of.
- phase difference of the noise value is required in that the phase difference of the noise varies up to 1600v.
- the present inventors connect the RCR series circuits in parallel between the secondary output terminal of the transformer and the input terminal of the AC rectifier, and thus the impedance between the secondary side of the transformer and the alternating current rectifier through a capacitor structure interposed therebetween. It has led to the invention of an impedance matching filter using an RCR series circuit and an isolated type LED dimming converter using the RCR series circuit, which can significantly reduce the phase difference by correcting the difference and changing the phase of the noise to an in-phase.
- the present invention has been derived to solve the above-described problem, by connecting the RCR series circuit in parallel between the secondary output terminal of the transformer and the input terminal of the AC rectifier, the transformer through a symmetrical resistor and a capacitor structure interposed therebetween.
- the impedance matching filter using the RCR series circuit is connected in parallel with the secondary side of the transformer between the secondary side of the transformer and the alternating current rectifying part, the first side of which is connected to the secondary side of the transformer and one node.
- the impedance matching filter according to the present invention may be located on any one or more of the primary and secondary sides of the transformer.
- An insulation type LED dimming converter using an impedance matching filter includes a first resistor connected to the secondary side of the first transformer and one end to a node, a capacitor connected in series with the first resistor, and the capacitor A first impedance matching filter comprising a second resistor connected in series, the second side of the first transformer being connected to a node, the first impedance matching filter connected to the first impedance matching filter, the AC rectifying unit rectifying the input power, A second transformer for transforming the pulsating power output from the AC rectifying unit, the clamping unit connected in parallel to the primary side of the transformer for impedance matching with the second transformer, and the primary side of the transformer according to the control signal of the oscillating unit It includes a switching unit for switching the abnormal oscillation voltage, the clamping unit is a second impedance matching filter connected to the output terminal of the AC rectifying unit, the second voltage matching diode and the positive voltage in series in the forward connection to the second impedance matching filter, the second transformer It is
- the impedance difference between the secondary side of the transformer and the AC rectifier has the advantage of reducing noise.
- FIG. 1 is a diagram schematically showing a configuration of an impedance matching filter 100 using an RCR series circuit according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating a part of a dimming circuit to which the impedance matching filter 100 using the RCR series circuit shown in FIG. 1 is applied.
- FIG 3 is a view showing a change in triac noise before and after applying the matching filter 100 using the RCR series circuit according to an embodiment of the present invention.
- FIG. 4 is a diagram schematically showing the configuration of an insulation type LED dimming converter 200 using an impedance matching filter according to another embodiment of the present invention.
- FIG. 1 is a diagram schematically showing the configuration of an impedance matching filter 100 using an RCR series circuit according to an embodiment of the present invention
- FIG. 2 is an impedance matching filter 100 using the RCR series circuit shown in FIG. 1.
- the impedance matching filter 100 using an RCR series circuit includes first resistors (R, 110), capacitors (C, 120), and second resistors (R). , 120 ), wherein the first resistor 110, the capacitor 120, and the second resistor 130 may be connected in series with each other.
- the impedance matching filter means to correct an impedance difference between the secondary side (winding wire) of the transformer 1 and the AC rectifier 2, and for this purpose, the impedance matching filter 110 using an RCR series circuit It can be connected in parallel with the secondary winding of the transformer (1).
- the impedance matching filter 100 using the RCR series circuit is illustrated as being connected in parallel with the secondary side (winding wire) of the transformer 1, but in one embodiment, the primary side of the transformer 1 ( Winding) may be located on any one or more of the primary and secondary sides of the transformer 1 so that it can be further connected in parallel.
- first resistor 110 may be connected to one node of the secondary side of the transformer 1 and a node
- second resistor 130 may be connected to the other side of the transformer 1 and the node.
- a capacitor 120 is positioned between the first resistor 110 and the second resistor 120 to be connected in series. The first resistor 110 and the second resistor 130 may serve to distribute the AC voltage output from the secondary side of the transformer 1.
- the frequencies of the first and second resistors 110 and 130 are in-phase due to the characteristics of the symmetry of the left and right symmetry.
- FIG. 3 Looking at this in more detail through FIG. 3 as follows.
- FIG. 3 is a diagram illustrating a change in triac noise before and after applying the impedance matching filter 100 using an RCR series circuit according to an embodiment of the present invention.
- Figure 3 (a) shows the noise characteristics of the triac (TRIAC) according to the state before applying the impedance matching filter 100 using the RCR series circuit, for example, only the capacitors on both nodes of the secondary side of the transformer 1 It may mean a structure to be connected in parallel. In this structure, as shown in FIG. 3(a), it can be seen that the phase of noise is changed in a positive direction and a negative direction, thereby generating a phase difference.
- TRIAC triac
- Figure 3 (b) shows the noise characteristics of the triac according to the state of applying the impedance matching filter 100 using the RCR series circuit according to an embodiment of the present invention, in this structure, all phases of the noise in the positive direction It can be seen that the phase difference is reduced by being output in the same phase.
- an AC power supply with significantly reduced phase difference of noise may be applied to the AC rectifying unit 2, and based on this, the transformer ( It can be seen that the insulation characteristic of the AC power output through 1) is improved compared to the conventional impedance matching filter structure.
- FIG. 4 is a diagram schematically showing the configuration of an insulation type LED dimming converter 200 using an impedance matching filter according to another embodiment of the present invention.
- the insulation type LED dimming converter 200 using an impedance matching filter is largely the first impedance matching filter 210, the AC rectifying unit 220, the clamping unit 230, the oscillating unit 240, the second transformer ( 250) and a switching unit 260.
- the first impedance matching filter 210 is the same as the impedance matching filter 100 using the RCR series circuit described with reference to FIGS. 1 and 2, description thereof will be omitted.
- the insulation type LED dimming converter 200 using the impedance matching filter ultimately receives the commercial power Vin and outputs Vout, the first impedance matching filter 210, the alternating current rectifying part 220, the clamping part 230, and the oscillating part ( 240), the second transformer 250 and the switching unit 260.
- the AC rectifying unit 220 is composed of bridge diodes D1 to D4, and may serve to rectify commercial input power.
- the clamping unit 230 performs an impedance matching function with the second transformer 250 to be described later, and an overvoltage suppression diode connected in series in the forward direction to the second impedance matching filter 231 and the second impedance matching filter 231 voltage supressor diode (234), referred to as TVS diode) and the overvoltage suppression diode 234, a switching diode 236 connected in the reverse direction may be configured in series.
- the second impedance matching filter 231 may be composed of a resistor 232 or a resistor 232 and a capacitor 233 connected in parallel.
- the node 221 outputting the “rectified” input voltage Vinr of the AC rectifying unit 220 includes one end and a second end of the resistor 232 and the capacitor 233. It is connected to one terminal of the primary winding P of the transformer 250.
- the resistor 232 connected in parallel and the other end of the capacitor 233 are connected to the anode of the TVS diode 234, and the cathode of the TVS diode 234 is connected to the cathode of the switching diode 236.
- the TVS diode 234 performs an overvoltage blocking function
- the switching diode 236 performs a fast recovery function
- the other terminal of the primary winding P of the second transformer 250 is connected to the anode of the switching diode 236 and the drain of the switching FET 260 at the node 237.
- the oscillation unit 240 is composed of a power factor correction IC to provide a square wave switching signal to the switching unit 260.
- the switching unit 260 may be composed of a switching FET, gate-controlled by a square wave output signal from the reverse flow improvement unit, and the drain, as described above, at the node 237, the anode and the second transformer of the switching diode 236 ( 250) is connected to the other terminal of the primary winding P, and the source is connected to ground.
- the switching FET 260 is turned on so that the abnormal oscillation voltage generated in the second transformer 250 is the switching FET ( 260) and exit to ground.
- the switching FET 150 is turned off, and the abnormal oscillation voltage generated in the second transformer 250 is a switching diode. It is applied to the TVS diode 234 through 236.
- the TVS diode 234 is shorted, and as a result, conversion of the input voltage through the second transformer 250 is performed. Not only that, but also the high voltage input power is applied to the internal circuit including the oscillator 240 as it is, the circuit may be destroyed.
- the second impedance matching filter 231 connected in series to the TVS diode 234 covers the abnormal oscillation voltage, that is, the abnormal oscillation voltage is lowered by the partial pressure of the second impedance matching filter 231 to cause the TVS diode ( 234) is prevented from being shorted.
- an impedance matching filter in manufacturing an impedance matching filter, it has an advantage of reducing noise by correcting an impedance difference between a secondary side of an transformer and an alternating current rectifier, and the present invention is widely used in the LED lighting and electric and electronic industries. It is a technology that can realize practical and economic value.
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- Optics & Photonics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims (3)
- 트랜스포머의 2차측과 교류 정류부 사이에서 트랜스포머와의 임피던스 매칭을 위해, 상기 트랜스포머의 2차측과 병렬로 연결되는 임피던스 매칭 필터에 있어서,상기 트랜스포머의 2차측과 일단이 노드로 연결되는 제1 저항;상기 제1 저항과 직렬로 연결되는 커패시터; 및상기 커패시터와 직렬로 연결되며, 상기 트랜스포머의 2차측과 타단이 노드로 연결되는 제2 저항;을 포함하며,상기 트랜스포머의 2차측과 상기 교류 정류부 사이의 임피던스 차를 보정하는 것을 특징으로 하는, RCR 직렬 회로를 이용한 임피던스 매칭 필터.
- 제1항에 있어서,상기 트랜스포머의 1차측 및 2차측 중 어느 하나 이상에 위치되는 것을 특징으로 하는, RCR 직렬 회로를 이용한 임피던스 매칭 필터.
- 제1 트랜스포머의 2차측과 일단이 노드로 연결되는 제1 저항;상기 제1 저항과 직렬로 연결되는 커패시터;상기 커패시터와 직렬로 연결되며, 상기 제1 트랜스포머의 2차측과 타단이 노드로 연결되는 제2 저항을 포함하는 제1 임피던스 매칭 필터;상기 제1 임피던스 매칭 필터와 연결되며, 입력전원을 정류하는 교류 정류부;상기 교류 정류부에서 출력되는 맥류전원을 변압하는 제2 트랜스포머;상기 제2 트랜스포머와의 임피던스 매칭을 위해 상기 트랜스포머의 1차측에 병렬로 연결되는 클램핑부; 및발진부의 제어신호에 따라 상기 트랜스포머의 1차측에 걸리는 이상 발진전압을 스위칭하는 스위칭부를 포함하며,상기 클램핑부는,상기 교류 정류부의 출력단에 연결되는 제2 임피던스 매칭 필터;상기 제2 임피던스 매칭 필터에 순방향으로 직렬 연결되는 과전압 억제 다이오드; 및양극이 상기 제2 트랜스포머의 1차측에 연결되어 역방향으로 상기 과전압 억제 다이오드에 직렬 연결되는 스위칭 다이오드로 구성되며,상기 이상 발진전압이 상기 과전압 억제 다이오드의 역방향 브레이크다운 전압보다 클 경우, 상기 제2 임피던스 매칭 필터가 상기 이상 발진전압을 분압에 의해 다운시켜 상기 과전압 억제 다이오드의 쇼트를 방지하는 것을 특징으로 하는, 임피던스 매칭 필터를 이용한 절연타입 LED 디밍 컨버터.
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KR20170086314A (ko) * | 2016-01-18 | 2017-07-26 | 금호전기주식회사 | 엘이디 램프 |
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- 2018-11-28 WO PCT/KR2018/014857 patent/WO2020111312A1/ko active Application Filing
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KR20040045098A (ko) * | 2002-11-22 | 2004-06-01 | 엘지전자 주식회사 | 전원 공급 장치 |
KR20070093761A (ko) * | 2006-03-15 | 2007-09-19 | 엘지.필립스 엘시디 주식회사 | 엘이디 백라이트 구동회로 |
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KR101963967B1 (ko) * | 2017-09-07 | 2019-04-01 | 주식회사 아이레즈 | Rcr 직렬 회로를 이용한 임피던스 매칭 필터 및 이를 이용한 절연타입 led 디밍 컨버터 |
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