This paper describes a high-frequency soft-switching dc-dc converter with simple energy recovery capacitor snubber on the secondary side. The presented full-bridge removes main drawbacks of classic Phase Shifted PWM (PS-PWM) converter, e.g., circulating current flowing during free-wheeling interval and dependency soft switching load current. utilizes topology pulse-width modulation centre-tappe...

In electrical distribution network, load varies over the day, with very low from midnight to early morning and peak values occurring in evening due demand by consumer. This variation leads reactive power because most loads are inductive especially industries where three phase industrial motors used. addition, Furthermore, affects current flow through lines, transformers, generators cause losses...

A role for vacancies Hafnia-based materials are of interest because their potential use in microelectronic components. Hafnia-oxide is a ferroelectric material, but whether the polarization switching comes from polar crystal phases or migration oxygen has remained an open question. Nukala et al. attempted to resolve this controversy by conducting electron microscopy during operation hafnium zir...

Effectiveness of an electrical distribution system depends on the stability its voltage profile. Several methods such as Static Compensator (SC), Thyristor Controlled Series Compensation (TCSC) and Capacitor have been applied for system. However, these characterized by harmonic variation low efficiency. Therefore, this research paper Shunt Switching (SSC) 11 kV located at Monatan, Ibadan, Oyo S...

A fully integrated successive-approximation (SAR) switched-capacitor (SC) DC–DC converter is presented that overcomes the coarse output voltage resolution limitation of traditional SC converters. An SAR SC converter cascades multiple stages of 2:1 SC converters, and achieves a fine-grained conversion ratio resolution of VIN/2 , where VIN is the input voltage and N is the number of stages. As th...

This thesis focuses on controller design and analysis for induction motor (IM) drives, flux control for electrically excited synchronous motors with damper windings (EESMs), and to enhance voltage sag ride-through ability and analysis for a wind turbine application with a full-power grid-connected active rectifier. The goal is to be able to use the existing equipment, without altering the hardw...