Flicker distortion power factor analysis in lighting LED's

Ionescu, Ciprian; Dima, M.; Bonfert, Detlef

doi:10.1109/siitme.2017.8259908

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…High efficiency enables a low consumption of electrical energy. However, in most cases, the efficiency of LED drivers is low [20][21][22][23][24], and they cause harmonics in the input current and a low power factor [25][26][27]. The proposed LED driver has overcome these THD and power factor issues.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of an Efficient Bicolor LED Driving System

Ferdous

Rashid

2022

Electronics

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There are some challenges involved in the design of a multicolor LED driver, such as the precise control of color consistency, i.e., maintaining the correlated color temperature (CCT) and luminous intensity. CCT deviation causes a color shift of composite light. This paper approaches the method of nonlinear optimization of the LED currents of two LED sources to achieve the desired CCT. A bicolor blended-shade white LED system is formed by using a warm color LED source of 1000 K CCT and a cool color LED source of 6500 K CCT. By using a nonlinear optimization methodology, the reduced deviation of the blended CCT and optimum LED currents are obtained. The optimized currents in the two LED strings are maintained by the control circuit of the single-ended primary inductor converter (SEPIC). The obtained reduced deviation of the CCT is 43 K, and the precision is 99.15%. Again, harmonics in the input current hamper power quality, i.e., reduce the power factor and increase power loss. This paper proposes the harmonic reduction technique to achieve the lowest value of total harmonic distortion (THD) through the nonlinear parametric optimization of the SEPIC. Measured THD = 4.37%; PF = 0.96; and efficiency = 92.8%. The system stability was determined and found to be satisfactory.

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Section: Introductionmentioning

confidence: 99%

Design Optimization of an Efficient Bicolor LED Driving System

Ferdous

Rashid

2022

Electronics

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“…Thus, LED lighting system is used more other conventional lighting systems like high pressure sodium, incandescent, metal halide, fluorescent, etc. Thus it is recommended that LED lighting system should use instead of usual conventional lighting systems [6][7][8].Beside the advantages of using LED lamps of energy consumption, there have negative effect on both the utility and consumer side which observed through different power quality problems [9][10][11]. In references [12][13][14] LEDs are the causes of harmonics as electronic circuits used through their firing.…”

Section: Introductionmentioning

confidence: 99%