An AC-DC LED Integrated Streetlight Driver with Power Factor Correction and Soft-Switching Functions

Abstract

The use of light-emitting diodes (LEDs) in street lighting applications has been greatly welcomed with the current trends of energy saving, environmental protection, carbon reduction, and sustainable development. This paper presents a novel AC-DC LED integrated streetlight driver that combines an interleaved buck converter with a coupled inductor and a half-bridge series resonant converter with a full-bridge rectifier into a single-stage power conversion topology with power factor correction (PFC) and soft switching capabilities. The PFC is achieved by designing the coupling inductor in the interleaved buck converter sub-circuit in discontinuous conduction mode. In addition, the resonant tank in the half-bridge series resonant converter sub-circuit is designed to be similar to an inductive load, thus giving the power switch a zero-voltage switching (ZVS) function, decreasing switching losses and increasing the overall efficiency of the proposed circuit. A prototype circuit of the proposed LED integrated streetlight driver with a power rating of 165 W (235 V/0.7 A) and 110 V input utility voltage has been developed and tested. According to the measurement results, a power factor greater than 0.98, a total harmonic distortion coefficient of the input current less than 3%, and an efficiency greater than 89% were obtained in the AC-DC LED integrated streetlight driver. Therefore, the experimental results are satisfactory and demonstrate the functionality of the proposed AC-DC LED integrated streetlight driver.

Determinants of the Generation of Higher Current Harmonics in Different Operating States of the RGB LED Lamp

“…And these, in turn, can adversely affect the supply voltage in the electrical network, causing its distortion, or adversely affect the correct operation of other devices installed in the network. However, regardless of the solutions adopted, most power supply systems use a diode rectifier with a capacitor that filters the ripple of the rectified voltage at the input and then electronic modules to ensure current and voltage stability for the LED semiconductor structures that create the light matrix of the LED lamp, which, in the absence of an additional module in the form of a higher harmonic filter or a power factor correction circuit, causes the power supply to generate higher harmonic currents to the mains [9,28,29,[32][33][34][35][36][37]]. An LED lamp constructed in this way draws a distorted (non-sinusoidal) current and is seen as a nonlinear load from the mains.…”

A Novel Integrated Electronic Lighting Driver Circuit for Supplying an LED Projection Lamp with High Power Factor and Soft Switching Characteristics

“…Table 4 shows comparisons between the existing two-stage and single-stage AC-DC driver circuit suitable for powering the LED projection lamp in [18,29,30] and the proposed one. As can be seen from Table 4, the proposed LED driver circuit saves a power switch and a diode compared to the existing two-stage one.…”

“…As can be seen from Table 4, the proposed LED driver circuit saves a power switch and a diode compared to the existing two-stage one. In addition, the proposed LED driver circuit saves one magnetic element and four diodes compared to the existing single-stage LED driver circuit in [29] and six diodes compared to the existing single-stage LED driver circuit in [30].…”

“…Table 4. Comparisons between the existing two-stage and single-stage AC-DC driver circuit suitable for powering the LED projection lamp in [18,29,30] and the proposed one. Prototype Driver Circuit LED Projection Lamp Moreover, Figure 27 shows the loss breakdown chart of the proposed integrated electronic lighting driver circuit for supplying with the LED projection lamp.…”