The conventional two-stage power converters with bridge rectifiers are inefficient and may not be practical for the low-voltage microgenerators. This paper presents an efficient acto-dc power converter that avoids the bridge rectification and directly converts the low ac input voltage to the required high dc output voltage at a higher efficiency. The proposed converter consists […]
Single-Phase AC–AC Converter Based on Quasi-Z-Source Topology-Matlab-Power Electronics-2010
This paper dealswith a new family of single-phase ac–ac converters called single-phase quasi-Z-source ac–ac converters.The proposed converter inherits all the advantages of the traditional single-phase Z-source ac–ac converter, which can realize buck–boost, reversing, or maintaining the phase angle. In addition,the proposed converter has the unique features that the input voltage and output voltage share the […]
An Inrush Mitigation Technique of Load Transformers for the Series Voltage Sag Compensator-Matlab-Power Electronics-2010
Survey results suggest that 92% of interruption at industrial facilities is voltage sag related. The voltage sag compensator,based on a transformer-coupled series-connected voltagesource inverter, is among the most cost-effective solution against voltage sags. When voltage sags happen, the transformers, which are often installed in front of critical loads for electrical isolation, are exposed to the […]
A Soft Switching Scheme for Multiphase DC/Pulsating-DC Converter for Three-Phase High-Frequency-Link Pulsewidth Modulation (PWM) Inverter-Matlab-Power Electronics-2010
This paper outlines a switching scheme to improve the energy efficiency for an isolated high-frequency multiphase dc/pulsating-dc converter, which is the front end of a three-phase rectifier-type high-frequency-link inverter.Without using any auxiliary circuit, the proposed switching scheme achieves zero-current or zero-voltage switching for the power switches on the front-end multiphase dc/pulsating-dc converter. Moreover, on the […]
Circuit Analysis and Modeling of a Phase-Shifted Pulsewidth modulation Full-Bridge-Inverter-Fed Ozone Generator With Constant Applied Electrode Voltage-Matlab-Power Electronics-2010
This paper proposes a circuit analysis and system modeling of an ozone generator using a phase-shifted pulsewidth modulation full-bridge inverter connected to two electrodes via a step-up transformer. The circuit operation of the inverter is fully described. Approximate models of the high-frequency transformer and the ozone-generating tube are given. Model parameter values are obtained from […]
A Simple Digital Autotuning For Analog Controller in SMPS-Matlab-Power Electronics-2010
This paper discusses the self-tuning capabilities of an analog current-mode controller for switch-mode power supplies.The proposed tuning techniques are based on the insertion of nonlinear (NL) blocks in the analog control loop and the generation of a controlled oscillation on the output voltage, in order to measure the closed-loop properties like gain margin, phase margin,and […]
Mix-Voltage Conversion for Single-Inductor Dual-Output Buck Converters-Matlab-Power Electronics-2010
Asingle-inductor dual-output (SIDO) buck converter has recently found applications in hand-held battery-powered electronic devices. The circuit operation and the functional interdependencies among basic converter parameters such as dc voltage gains,transistor duty cycles, and load current levels are much more complicated than those of the single-output counterpart. In this paper, arigorous analysis was conducted to develop […]
PFC Cuk Converter Based Electronic Ballast for an 18 W Compact Fluorescent Lamp-Matlab-Power Electronics-2010
This paper deals with the design and performance simulation of high power factor (HPF), low crest factor electronicballast for a compact fluorescent lamp (CFL). The proposed electronic ballast uses a Cuk buck-boost ac-dc converter incontinuous conduction mode (CCM) as a power factor preregulator. In this electronic ballast topology, a self oscillatinghalf bridge series resonant parallel […]
Bridgeless SEPIC Rectifier With Unity Power Factor and Reduced Conduction Losses-Matlab-Power Electronics-2009
In this paper, a new bridgeless single-phase ac–dc converter with an automatic power factor correction (PFC) isproposed. The proposed rectifier is based on the single-ended primary inductance converter (SEPIC) topology and it utilizes a bidirectional switch and two fast diodes. The absence of an input diode bridge and the presence of only one diode in […]
Integrating Web Content Clustering into Web Log Association Rule Mining
One of the effects of the general Internet growth is an immense number of user accesses to WWW resources. These accesses are recorded in the web server log files, which are a rich data resource for finding useful patterns and rules of user browsing behavior, and they caused the rise of technologies for Web usage […]
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