Sarayoot ThongkullaphatRajamangala University of Technology Suvarnabhumi · Department of Electrical Engineering
Sarayoot Thongkullaphat
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Publications (6)
Solar simulator is used to analysis characteristic of the solar cells. The non-uniformity is its major performance. The traditional non-uniformity measurement calls single detector method. The paper’s objective is to design and construct an array detector scanning system and to determine the optimal scanning time to achieve the lowest uncertainty....
Low-level light therapy (LLLT) uses the light of wavelength between 400–700 nm to treat acne, reduce inflammation, stimulate collagen production, and rejuvenate the facial skin. This study designed and constructed a dual-wavelength LED LLLT device for the facial treatment. The light spectrum, power density, uniformity, stability, and safety of the...
This paper proposes fluorescent electronic ballast with high power factor and low line input current harmonics. The system performance can be improved by a charged pump circuit. Details of design and circuit operation are described. The proposed electronic ballast is modified from single-stage half bridge class D electronic ballast by adding capaci...
In this study, for application of 36 W/220 Vrms/50 Hz fluorescent lamp, a high performance of high-power-factor and low line input current harmonics of electronic ballast is proposed. The proposed ballast has a structure based on a combination of charged pump and valley fill circuit. By adding paralleled capacitors to each power switch and setting...
This paper proposes fluorescent electronic ballast with high power factor and low line input current harmonics. The system performance can be improved by combining together with a charged pump and valley fill circuit. Details of design and circuit operation are described. The proposed electronic ballast is modified from single - stage class D elect...
This paper proposes a novel 36W / 220Vrms / 50Hz of half-bridge inverter self-oscillating electronic ballast for a fluorescent lamp with high power factor and low line input current harmonics. The system performance can be improved by combining together with a charged pump and valley fill circuit. Details of design and circuit operation are describ...
