Trends in Electrical Engineering
Volume 10, Issue 1 (2020)
Published
Table of contents
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A Brief Study on REM (Rapid Eye Movement)
Abstract: Human sleep is broadly classified into two groups: rapid eye movement (REM) and non-rapideye movement (NREM). According to the American Academy of Sleep Medicine (AASM) sleepscoring manual, NREM stage is further divided into N1, N2 and N3 stages with theprogression of sleep. The standard method of sleep analysis is known as polysomnography(PSG), where several physiological signals are acquired, visually analyzed by sleeptechnicians and scored into various stages. Manual analysis and …
Published in Trends in Electrical Engineering · Vol. 10, Issue 1, 2020 · pp. 1–6 Read article
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Overhead Electric Equipment in Indian Railway in Electric Powered Traction
Abstract: The supply to the Over Head tool (OHE) from TSS is fed through interrupters positioned at Feeding placed up (FP). Adjacent TSS typically resources electricity to the OHE on one among a type phases to reduce unbalance inside the deliver authority grid. To keep away from the pantograph of a locomotive or electric powered more than one unit bridging the deliver from one among a kind levels, even as it …
Published in Trends in Electrical Engineering · Vol. 10, Issue 1, 2020 · pp. 22–29 Read article
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The Analysis of Bridge Rectifier Circuits using Mathematica
Abstract: This paper addresses the steady-state and transient analysis of bridge rectifiers. It starts withsuggesting an efficient representation of the diodes. A single equation that describes thediode’s performance in both the forward and reverse directions is presented. It implicitlytakes the voltage polarity into account. Without any loss of generality, the suggested method isapplied to the classical uncontrolled four-valve full-wave rectifier bridge configureuration.The effect of the load resistance and the eventual presence …
Published in Trends in Electrical Engineering · Vol. 10, Issue 1, 2020 · pp. 30–42 Read article
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The Emergence of REM Detection Algorithm
Abstract: The objective is to use these EEG features for developing a simple algorithm capable ofdetecting REM stage epochs. Both these objectives ultimately aid the development of a sleepstaging algorithm that could be used as part of a truly wearable sleep system. Spectral edgefrequency (SEF) is the frequency below which a certain fraction of the signal powerKeywords: EEG, EEG channel, REM, Spectral edge frequency, SEFd, signal
Published in Trends in Electrical Engineering · Vol. 10, Issue 1, 2020 · pp. 43–49 Read article
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Harmonic Analysis of Full-Wave Diode Bridge Rectifier Circuits
Abstract: This paper analyzes the steady-state harmonic performance of four-diode, single-phase full-wave rectifier bridge circuits. The frequency spectra of the source and load currents are presented. The effect of the load resistance, the source inductance, the smoothing shunt- capacitor as well as the waveform of the supply voltage is illustrated. The approach can also handle cases involving non-sinusoidal sources and non-linear loads. Based on a Mathematica code, the paper presents the …
Published in Trends in Electrical Engineering · Vol. 10, Issue 1, 2020 · pp. 7–21 Read article