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Improving the Dimming Performance of Low-Power Single-Stage AC-DC HBLED Drivers

  • Identification data

    Identifier: imarina:3665444
    Authors:
    Bodetto M., Aroudi A., Cid-Pastor A., Al-Numay M.
    Abstract:
    The design of efficient single-stage high-brightness light-emitting diodes (HBLEDs) ac¿dc drivers with power factor correction (PFC) in low-power applications is addressed in this paper. The PFC is achieved by using a switching converter with both step-up and step-down voltage capability. It is well known that a good tracking of the input reference current close to the zero crossing is challenging, in particular when the LED output current is low, hence jeopardizing the power quality at low power levels. A solution is proposed to improve the power quality in ac¿dc LED drivers under inner current loop based on a variable hysteresis modulation scheme. An adaptive hysteresis window modulated by the input voltage and the output LED current reference is used. The double modulation strategy helps to avoid the distortion near the zero crossings of the input current and to improve the dimming performance of the HBLEDs. This results in a low value of total harmonic distortion (THD) under low current/power conditions and therefore in a very good dimming performance in single-stage ac¿dc HBLEDs drivers with PFC. The operation principle of the proposed technique is presented and numerical simulations are shown to demonstrate its functionality. A laboratory prototype is designed and tested to verify its feasibility obtaining a significant improvement in terms of power quality. Under universal input voltage operation, good efficiency and low THD can be achieved even for low power levels.
  • Others:

    Author, as appears in the article.: Bodetto M., Aroudi A., Cid-Pastor A., Al-Numay M.
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    URV's Author/s: BODETTO, MIRKO ANDRÉS / Cid Pastor, Angel / El Aroudi Chaoui, Abdelali
    Keywords: Power factor correction (pfc) Lighting control Led lamps Dimming Ac-dc power converters
    Abstract: The design of efficient single-stage high-brightness light-emitting diodes (HBLEDs) ac¿dc drivers with power factor correction (PFC) in low-power applications is addressed in this paper. The PFC is achieved by using a switching converter with both step-up and step-down voltage capability. It is well known that a good tracking of the input reference current close to the zero crossing is challenging, in particular when the LED output current is low, hence jeopardizing the power quality at low power levels. A solution is proposed to improve the power quality in ac¿dc LED drivers under inner current loop based on a variable hysteresis modulation scheme. An adaptive hysteresis window modulated by the input voltage and the output LED current reference is used. The double modulation strategy helps to avoid the distortion near the zero crossings of the input current and to improve the dimming performance of the HBLEDs. This results in a low value of total harmonic distortion (THD) under low current/power conditions and therefore in a very good dimming performance in single-stage ac¿dc HBLEDs drivers with PFC. The operation principle of the proposed technique is presented and numerical simulations are shown to demonstrate its functionality. A laboratory prototype is designed and tested to verify its feasibility obtaining a significant improvement in terms of power quality. Under universal input voltage operation, good efficiency and low THD can be achieved even for low power levels.
    Thematic Areas: Interdisciplinar Instruments & instrumentation Engineering, electrical & electronic Engenharias iv Engenharias iii Electrical and electronic engineering Control and systems engineering Computer science applications Ciência da computação Automation & control systems
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 02780046
    Author's mail: angel.cid@urv.cat abdelali.elaroudi@urv.cat
    Author identifier: 0000-0001-8124-6210 0000-0001-9103-7762
    Record's date: 2024-09-07
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://ieeexplore.ieee.org/document/7815373
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Ieee Transactions On Industrial Electronics. 64 (7): 5797-5806
    APA: Bodetto M., Aroudi A., Cid-Pastor A., Al-Numay M. (2017). Improving the Dimming Performance of Low-Power Single-Stage AC-DC HBLED Drivers. Ieee Transactions On Industrial Electronics, 64(7), 5797-5806. DOI: 10.1109/TIE.2017.2652370
    Article's DOI: 10.1109/TIE.2017.2652370
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2017
    Publication Type: Journal Publications
  • Keywords:

    Automation & Control Systems,Computer Science Applications,Control and Systems Engineering,Electrical and Electronic Engineering,Engineering, Electrical & Electronic,Instruments & Instrumentation
    Power factor correction (pfc)
    Lighting control
    Led lamps
    Dimming
    Ac-dc power converters
    Interdisciplinar
    Instruments & instrumentation
    Engineering, electrical & electronic
    Engenharias iv
    Engenharias iii
    Electrical and electronic engineering
    Control and systems engineering
    Computer science applications
    Ciência da computação
    Automation & control systems
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