WO2020153603A1 - Convertisseur à del utilisant un condensateur solide - Google Patents

Convertisseur à del utilisant un condensateur solide Download PDF

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Publication number
WO2020153603A1
WO2020153603A1 PCT/KR2019/017617 KR2019017617W WO2020153603A1 WO 2020153603 A1 WO2020153603 A1 WO 2020153603A1 KR 2019017617 W KR2019017617 W KR 2019017617W WO 2020153603 A1 WO2020153603 A1 WO 2020153603A1
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WO
WIPO (PCT)
Prior art keywords
voltage
output
unit
rectifying
circuit unit
Prior art date
Application number
PCT/KR2019/017617
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English (en)
Korean (ko)
Inventor
배철희
Original Assignee
금호이앤지 (주)
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Publication date
Application filed by 금호이앤지 (주) filed Critical 금호이앤지 (주)
Publication of WO2020153603A1 publication Critical patent/WO2020153603A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the present invention relates to an LED converter. More specifically, it relates to an LED converter using a solid capacitor to replace the electrolytic capacitor with a solid capacitor.
  • the LED Light Emitting Diode
  • the LED is a semiconductor device that emits light, which is small, has a long life, and has excellent energy-saving effects, and thus various lighting devices using it are actively being developed.
  • the LED lighting device of the prior art is provided with a converter that converts AC power into DC power so that it can be applied to a general lighting system using AC power.
  • a capacitor serves as a smoothing circuit.
  • capacitors there are various types of capacitors, such as electrolytic capacitors, tantalum capacitors, ceramic capacitors, and Mylar capacitors.
  • electrolytic capacitors can be manufactured at a low cost and have a large capacity, so they are mainly used as components of converters.
  • Electrolytic capacitors have the disadvantage that they are vulnerable to life due to the nature of the converter that generates heat because it uses electrolyte. Therefore, the conventional LED lighting device has a problem that, despite the use of an LED element having a semi-permanent life, it can only guarantee a lifetime of about 30,000 to 50,000 hours due to the electrolytic capacitor.
  • the solid capacitor is difficult to make the breakdown voltage more than 50V, and due to the nature, there is a possibility of damage due to the breakdown voltage, which makes the circuit configuration difficult.
  • An object of the present invention is to provide an LED converter using a solid capacitor to easily protect a solid capacitor having a low breakdown voltage and capacity through a protection circuit in replacing the electrolytic capacitor with a solid capacitor.
  • An LED converter using a solid capacitor includes a first rectifying unit that rectifies an input AC voltage and converts it into a first DC voltage to output it;
  • a PWM generator configured to pulse-modulate the converted first DC voltage to output a first AC voltage
  • a transformer for converting and outputting the first AC voltage into a second AC voltage
  • a second rectifying unit rectifying the second AC voltage output from the transformer unit
  • a smoothing circuit unit formed by connecting a plurality of solid capacitors in parallel and smoothing a second AC voltage, which is an output voltage of the second rectifying unit, to output a second DC voltage;
  • a fixed current circuit unit providing a fixed current according to the second DC voltage output from the smoothing circuit unit
  • a detection circuit unit that detects a current value output from the fixed current circuit unit and outputs it as a feedback signal
  • a control unit receiving the feedback signal and controlling the PWM generator
  • a TVS circuit unit connected in parallel to the second rectifying unit to protect the solid capacitor of the smoothing circuit unit to suppress a transient voltage and output a constant current of 50 V or less;
  • the LED converter using a solid capacitor comprises: a first rectifying unit that rectifies an input AC voltage and converts it into a first DC voltage to output it;
  • a PWM generator configured to pulse-modulate the converted first DC voltage to output a first AC voltage
  • a transformer for converting and outputting the first AC voltage into a second AC voltage
  • a second rectifying unit rectifying the second AC voltage output from the transformer unit
  • a smoothing circuit unit formed by connecting a plurality of solid capacitors in parallel and smoothing a second AC voltage, which is an output voltage of the second rectifying unit, to output a second DC voltage;
  • a fixed current circuit unit providing a fixed current according to the second DC voltage output from the smoothing circuit unit
  • a detection circuit unit that detects a current value output from the fixed current circuit unit and outputs it as a feedback signal
  • a control unit receiving the feedback signal and controlling the PWM generator
  • a TVS circuit unit connected in parallel to the second rectifying unit to protect the solid capacitor of the smoothing circuit unit to suppress a transient voltage and output a constant current of 50 V or less;
  • Each of the second rectifiers may be connected in series to the respective solid capacitors, and the TVS circuits may be connected to the diodes of each of the second rectifiers in parallel.
  • the cost is higher than that of the electrolytic capacitor, and the effect of properly protecting the solid capacitor of a low breakdown voltage and capacity There is.
  • FIG. 1 is a view schematically showing the configuration of an LED converter using a solid capacitor according to a first embodiment of the present invention.
  • FIG. 2 is a view showing a circuit connection relationship of the solid capacitor, the second rectifying unit, and the TVS circuit unit according to the first embodiment of the present invention.
  • FIG 3 is a view schematically showing the configuration of an LED converter using a solid capacitor according to a second embodiment of the present invention.
  • FIG. 4 is a view schematically showing the configuration of an LED converter using a solid capacitor according to a third embodiment of the present invention.
  • FIG. 5 is a view showing a circuit connection relationship between a solid capacitor, a second rectifier, and a TVS circuit according to a second embodiment of the present invention.
  • FIG. 6 is a view showing a circuit connection relationship between a solid capacitor, a second rectifier, and a TVS circuit according to a third embodiment of the present invention.
  • FIG. 7 is a view showing a circuit connection relationship between a solid capacitor, a second rectifier, and a TVS circuit according to a fourth embodiment of the present invention.
  • first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term.
  • FIG. 1 is a diagram schematically showing the configuration of an LED converter using a solid capacitor according to a first embodiment of the present invention
  • FIG. 2 is a circuit of a solid capacitor, a second rectifier, and a TVS circuit according to the first embodiment of the present invention It is a diagram showing the connection relationship.
  • the LED converter using the solid capacitor according to the first embodiment of the present invention includes a first rectifying unit 110, a PWM generating unit 120, a transformer unit 130, a second rectifying unit 140, a smoothing circuit unit 150, fixed It includes a current circuit unit 160, a detection circuit unit 170, a control unit 180, a TVS circuit unit 190 and a surge circuit unit 200.
  • the first rectifying unit 110 rectifies the input AC voltage provided from the power supply to convert and output the first DC voltage, and a bridge rectifier or the like can be applied.
  • the PWM generator 120 outputs the first DC voltage converted and output from the first rectifying unit 110 as a first AC voltage by pulse width modulation (PWM).
  • PWM pulse width modulation
  • the transformer 130 converts and outputs a first AC voltage, which is a pulse width modulated voltage output from the PWM generator 120, to a second AC voltage.
  • the second rectifying unit 140 rectifies the second AC voltage converted and output from the transformer 130 through a diode.
  • the smoothing circuit unit 150 is formed by connecting a plurality of solid capacitors in parallel, and smoothing the second AC voltage to output the second DC voltage.
  • the solid-state capacitor smoothes the output voltage of the second rectifying unit 140 and is charged with the second DC voltage to supply the driving power of the LED lighting device.
  • the fixed current circuit unit 160 provides a fixed current according to the second DC voltage output from the smoothing circuit unit 150 to an external load.
  • the detection circuit unit 170 detects a current value output from the fixed current circuit unit 160 and outputs a feedback signal to the control unit 180.
  • the controller 180 receives the feedback signal to control the PWM generator 120.
  • the TVS circuit unit 190 is a protection circuit for protecting the solid capacitor of the smoothing circuit unit 150 and is connected in parallel to the second rectifying unit 140 to suppress the transient voltage.
  • the TVS circuit unit 190 is configured to connect a TVS diode in parallel to the second rectifying unit 140 in order to protect a solid capacitor having a higher cost compared to an electrolytic capacitor and a low breakdown voltage (up to 50V) and a capacity (220 kW or less).
  • TVS diodes have fast response time (ns level) and high surge current absorption capability, making them suitable for immediate circuit protection against transient voltage spikes.
  • Solid capacitors manufactured at the current technology level have a maximum internal pressure of 50 V and a capacity of 220 MPa or less. Therefore, the LED converter of the present invention is configured so that the maximum output is within 50 V, but is formed by connecting a solid capacitor in parallel to increase capacity.
  • the smoothing circuit unit 150 configures the maximum output to be within 50 V, and configures the number of solid capacitors in parallel to increase capacity corresponding to the capacity of the electrolytic capacitor. .
  • the electrolytic capacitor when replacing the electrolytic capacitor with a solid capacitor, it is configured to replace the electrolytic capacitor 1000 ⁇ F, 50V with a plurality of solid capacitors 220 ⁇ F, 50V. That is, 4 to 5 solid capacitors 220 ⁇ F and 50 V are configured in parallel.
  • the surge circuit unit 200 is connected in parallel to a power supply that transmits an alternating voltage to the first rectifying unit 110 so as to protect it from surge, and a varistor device, which is a device that significantly lowers resistance when a high voltage is applied Adopt and configure.
  • the surge circuit unit 200 removes noise of an AC voltage supplied from a power supply and provides it to the first rectifying unit 110, and selectively configures an electromagnetic interference filter (EMI filter) to remove high-frequency noise of the AC voltage.
  • EMI filter electromagnetic interference filter
  • the LED converter rectifies AC 220V at the rectifying unit, converts it to DC 310V, converts it to a PWM waveform through the transformer 130, and then outputs a constant current of 50V or less through a smoothing circuit using a solid capacitor.
  • FIG 3 is a view schematically showing the configuration of an LED converter using a solid capacitor according to a second embodiment of the present invention.
  • the LED converter of the second embodiment of the present invention may be configured as a non-isolated converter, the first rectifier 110, the PWM generator 120, the transformer 130, the first 2
  • the rectifying part 140, the smoothing circuit part 150, the fixed current circuit part 160, the detection circuit part 170, the control part 180, the TVS circuit part 190, and the surge circuit part 200 are analog grounded (Ground, GND). .
  • FIG. 5 is a view showing a circuit connection relationship between a solid capacitor, a second rectifier, and a TVS circuit according to a second embodiment of the present invention.
  • the smoothing circuit unit 150 constitutes a plurality of solid capacitors in parallel.
  • the second rectifier 140 is connected to each of the solid capacitors in series, and the TVS circuit 190 is connected to the diodes of the second rectifier 140 in parallel, respectively.
  • FIG. 4 is a view schematically showing the configuration of an LED converter using a solid capacitor according to a third embodiment of the present invention.
  • the LED converter of the third embodiment of the present invention may be configured as an insulated converter, the first rectifier 110, the PWM generator 120, the detection circuit 170, the controller ( 180), the surge circuit unit 200 is analog ground (Ground, GND), the second rectifying unit 140, the smoothing circuit unit 150, the fixed current circuit unit 160 and the TVS circuit unit 190 is digitally grounded.
  • FIG. 6 is a view showing a circuit connection relationship between a solid capacitor, a second rectifier, and a TVS circuit according to a third embodiment of the present invention.
  • the TVS circuit unit 190 includes a first TVS diode 190a and a second TVS diode 190b.
  • the first resistor 212 and the first diode 210 are connected in series
  • the second resistor 222 and the second diode 220 are connected in series
  • the first TVS diode 190a and the 2 TVS diodes 190b are connected in series.
  • connection point between the first TVS diode 190a and the second TVS diode 190b and the connection point of the first diode 210 and the second resistor 222 are connected to each other.
  • the first TVS diode 190a and the second TVS diode 190b are connected to the capacitor 230 in parallel, and the first resistor 212, the first diode 210, the second resistor 222, and the second diode 220 is connected to the capacitor 230 in parallel.
  • the first TVS diode 190a and the second TVS diode 190b apply the same resistance value by the first resistor 212, the first diode 210, the second resistor 222, and the second diode 220.
  • the voltage to be made becomes uniform.
  • the capacitor 230 charges the output voltage of the second rectifying unit 140 and then slowly discharges the first resistor 210 and the second resistor 220 to absorb and remove the rapidly changing transient voltage within a short time. That is, the first TVS diode 190a and the second TVS diode 190b are protection circuits for protecting the solid capacitor and suppress the transient voltage, and the applied voltage becomes uniform, so that higher voltage is applied to only one TVS diode. By preventing, each TVS diode can operate stably within the range of the rated voltage.
  • FIG. 7 is a view showing a circuit connection relationship between a solid capacitor, a second rectifier, and a TVS circuit according to a fourth embodiment of the present invention.
  • the first resistor 240 and the first capacitor 250 are connected in series with each other, and the second resistor 260 and the second capacitor 270 are connected in series with each other.
  • connection point of the first TVS diode 190a and the second TVS diode 190b, the connection point of the first capacitor 250 and the second resistor 260, and the first TVS diode 190a and the second TVS diode 190b ) Are connected to each other.
  • the first capacitor 250 and the second capacitor 270 are charged by the first resistor 240 and the second resistor 260, and the charging voltage of the first capacitor 250 and the second capacitor 270 is zero.
  • a constant voltage may be maintained by the 1 TVS diode 190a and the 2nd TVS diode 190b.
  • the magnitude of the signal voltage generated at the input terminal is equal to or less than the charging voltage at the first capacitor 250 and the second capacitor 270, the magnitude of the signal voltage generated at the input terminal does not pass to the output terminal. That is, the LED converter does not output the input signal with a constant current below the desired DC voltage.
  • the leakage current is absorbed to the ground terminal, and the first capacitor 250 and the second capacitor 270 are absorbed. To discharge the constant voltage of the charging voltage and the surge voltage on the circuit.
  • the first TVS diode 190a and the second TVS diode 190b smooth the pulsating voltage rectified by the second rectifier 140 and the third rectifier 142.
  • the present invention has been described in detail through one embodiment, but this is for specifically describing the present invention, and the LED converter using the solid capacitor according to the present invention is not limited thereto.
  • the terms “include”, “consist”, or “have” as described above mean that the corresponding component can be inherent unless specifically stated to the contrary, excluding other components However, it should be interpreted as being able to further include other components, and all terms, including technical or scientific terms, are generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined. It has the same meaning as being.
  • the present invention replaces the electrolytic capacitor with a solid capacitor, and has a protection circuit for protecting the solid capacitor having a low breakdown voltage and capacity, it is possible to provide a stable LED converter with long life and strong durability against ambient conditions. There is industrial availability.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

La présente invention concerne un convertisseur à DEL utilisant un condensateur solide. Le convertisseur à DEL utilisant un condensateur solide, selon un mode de réalisation de la présente invention, remplace un condensateur électrolytique par un condensateur solide et comprend un circuit de protection pour protéger le condensateur solide ayant les caractéristiques d'une faible tension de tenue et d'une faible capacité, de façon à fournir un convertisseur à DEL qui a une bonne durabilité et qui est stable vis-à-vis des conditions environnantes tout en ayant une longue durée de vie, ce qui permet de prolonger la durée de vie d'un dispositif d'éclairage.
PCT/KR2019/017617 2019-01-25 2019-12-12 Convertisseur à del utilisant un condensateur solide WO2020153603A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190009815A KR102011110B1 (ko) 2019-01-25 2019-01-25 고체콘덴서를 이용한 led 컨버터
KR10-2019-0009815 2019-01-25

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WO2020153603A1 true WO2020153603A1 (fr) 2020-07-30

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102011110B1 (ko) * 2019-01-25 2019-08-14 금호이앤지 (주) 고체콘덴서를 이용한 led 컨버터
KR102524782B1 (ko) * 2023-01-09 2023-04-24 (주)다모아전자 엘이디 라이트를 위한 전원 회로

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010045913A (ja) * 2008-08-12 2010-02-25 Rohm Co Ltd 駆動装置
KR20130027692A (ko) * 2011-09-08 2013-03-18 주식회사 동부하이텍 Ｌｅｄ 구동장치를 위한 절연형 플라이백 변환회로
KR20130080265A (ko) * 2012-01-04 2013-07-12 (주) 강동테크 고체 콘덴서를 이용한 컨버터
KR101696656B1 (ko) * 2016-05-26 2017-01-16 석주한 교류 직접 구동 엘이디 조명장치
KR20170096424A (ko) * 2016-02-16 2017-08-24 이종현 서지 보호회로
KR102011110B1 (ko) * 2019-01-25 2019-08-14 금호이앤지 (주) 고체콘덴서를 이용한 led 컨버터

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8648359B2 (en) * 2010-06-28 2014-02-11 Cree, Inc. Light emitting devices and methods

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010045913A (ja) * 2008-08-12 2010-02-25 Rohm Co Ltd 駆動装置
KR20130027692A (ko) * 2011-09-08 2013-03-18 주식회사 동부하이텍 Ｌｅｄ 구동장치를 위한 절연형 플라이백 변환회로
KR20130080265A (ko) * 2012-01-04 2013-07-12 (주) 강동테크 고체 콘덴서를 이용한 컨버터
KR20170096424A (ko) * 2016-02-16 2017-08-24 이종현 서지 보호회로
KR101696656B1 (ko) * 2016-05-26 2017-01-16 석주한 교류 직접 구동 엘이디 조명장치
KR102011110B1 (ko) * 2019-01-25 2019-08-14 금호이앤지 (주) 고체콘덴서를 이용한 led 컨버터

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