Nowadays, light emitting diode (LED) lamps have been widely utilized for lighting system due to its low-energy consumption. The harmonic emission standard is ignored by most of the manufacturers, high current will increase injection and cause fire risk. Existing research focuses on investigating emissions from several specific LED drivers, but a systematic evaluation approach not given. contrib...

Oscillation or large variability of the control loops results decreased economical advantage to process industries due to inferior quality products, larger rate of rejections, reduced average throughputs and overall increased energy requirements. Stiction is one of the root cause of oscillation. Many studies suggest that 30% of the control loops are oscillatory because of control valve problems...

Abstract – The components of harmonics are integral multiple of the fundamental component and the components of inter-harmonics are are non integral multiple of the fundamental component. AC-DC-AC conversion systems used in variable speed drive are sources of inter-harmonics. There are several reasons for inter-harmonic generation in variable speed drives. In this paper, the generation of inter...

This paper proposes a three-level discrete Fourier transform (DFT) method to provide an accurate estimate of power system frequency in real time. The first level decomposes a power system signal into two orthogonal cosineand sine-filtered signals. The second and third levels are used to determine the amplitude ratio of the cosineand sine-filtered signals without encountering the zero-crossing p...