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A Single-Stage High Power Factor Power Supply for Providing an LED Street-Light Lamp Featuring Soft-Switching and Bluetooth Wireless Dimming Capability

Author

Listed:
  • Chun-An Cheng

    (Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan)

  • Hung-Liang Cheng

    (Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan)

  • Chien-Hsuan Chang

    (Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan)

  • En-Chih Chang

    (Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan)

  • Wei-Shiang Hung

    (Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan)

  • Chin-Chih Lai

    (Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan)

  • Long-Fu Lan

    (Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan)

Abstract

Light-emitting diode (LED) has the characteristics of environmental protection and energy saving, having become the lighting source of a new generation of street-light lamps. The traditional two-stage power supply for providing an LED street-light lamp is composed of an AC-DC converter with a power-factor-correction (PFC) function at the front stage and a DC-DC converter at the rear stage. The two-stage power supply for an LED street-light lamp has a large number of electronic components and costs, and the circuit efficiency is not high. Therefore, this paper presents a novel single-stage high power factor AC-DC power supply for providing an LED street-light lamp featuring soft-switching and Bluetooth wireless dimming capability through using smart tablets or smartphones to remote control the output power of the LED street-light lamp for achieving energy-saving benefits. The proposed AC-DC LED power supply integrates an interleaved buck converter circuit with coupled inductors and a half-bridge LLC resonant converter circuit into a single-stage power conversion circuit. Moreover, the coupled inductor of the interleaved buck converter circuit is designed to operate in the discontinuous conduction mode, which can naturally achieve PFC. In addition, the two power switches in the novel LED power supply have zero-voltage switching (ZVS) characteristics, which can reduce the switching losses of the power switches. The two output diodes have the characteristics of zero-current switching (ZCS), which can reduce the conduction losses of the power diodes. This paper developed a single-stage prototype circuit for providing an 144 W (36 V/4 A)-rated LED street-light lamp. According to the experimental results of the prototype circuit with an AC input voltage of 110 volts, the presented single-stage LED power supply offers high power factor (PF > 0.99), low input-current total harmonic distortion factor (THD < 3%), and high efficiency (>89%). In addition, this paper used the built-in Bluetooth wireless communication function of a smart tablet or smart phone to fulfill remote dimming control. By changing the duty ratio of the control signal, we could realize remote dimming control of 20% to 100% of the output LED street-light lamp power.

Suggested Citation

  • Chun-An Cheng & Hung-Liang Cheng & Chien-Hsuan Chang & En-Chih Chang & Wei-Shiang Hung & Chin-Chih Lai & Long-Fu Lan, 2021. "A Single-Stage High Power Factor Power Supply for Providing an LED Street-Light Lamp Featuring Soft-Switching and Bluetooth Wireless Dimming Capability," Energies, MDPI, vol. 14(2), pages 1-19, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:2:p:477-:d:482063
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    Citations

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    Cited by:

    1. Chun-An Cheng & Hung-Liang Cheng & Chien-Hsuan Chang & En-Chih Chang & Zheng-You Kuo & Cheng-Kuan Lin & Sheng-Hong Hou, 2023. "An AC-DC LED Integrated Streetlight Driver with Power Factor Correction and Soft-Switching Functions," Sustainability, MDPI, vol. 15(13), pages 1-19, July.
    2. Konrad Henryk Bachanek & Blanka Tundys & Tomasz Wiśniewski & Ewa Puzio & Anna Maroušková, 2021. "Intelligent Street Lighting in a Smart City Concepts—A Direction to Energy Saving in Cities: An Overview and Case Study," Energies, MDPI, vol. 14(11), pages 1-19, May.
    3. Chun-An Cheng & Chien-Hsuan Chang & Hung-Liang Cheng & En-Chih Chang & You-Ruei Lin & Long-Fu Lan, 2023. "A Novel Light-Emitting Diode Streetlight Driver Circuit Applied to a Direct Current-Input Voltage Source," Sustainability, MDPI, vol. 15(14), pages 1-15, July.

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