Subbarao M.,VignanUniversity |
Satyanarayana S.,Vrs And Yrn Engg College
Journal of Electrical Engineering | Year: 2013
The control technique presented in this paper-Linear Peak Current Mode Control (LPCMC) is a simplified power factor correction (PFC) technique for single stage AC/DC converters, Which has the following advantages: there is no multiplier and voltage sensing circuits, By using low cost standard PWM control IC's implementation becomes easy for this controller. In this paper Integrated buck-flyback converter (IBFC) is a single stage AC/DC converter, operating in discontinuous conduction mode(DCM) to achieve high Power factor with fast output voltage regulation. Operating modes of IBFC is also presented. comparative analysis of voltage mode controller to linear peak current controller for 90-230V input, 48V Output and 200W ac-dc converter operating at 100 kHz is presented and MATLAB/SIMULINK is used for implementation and simulation results show the performance improvement of proposed controller.
Subbarao M.,VignanUniversity |
Satyanarayana S.,Vrs And Yrn Engg College |
Sravan Kumar S.L.V.,GNITS
2014 International Conference on Smart Electric Grid, ISEG 2014 | Year: 2014
In this paper Fuzzy Controller bases AC/DC converter is presented to drive LEDs with high power factor. Because of having of advantages of Integrated converters like increased system reliability and reduced number of controlled switches in this paper IBFC(Integrated Buck-Flyback Converter) is considered as a driver circuit to drive LEDs. novel ac-dc IBFC converter combines input current shaping, isolation and better output regulation into a single stage. In this paper Integrated buck-fly-back converter (IBFC) is a single stage AC/DC converter, operating in discontinuous conduction mode (DCM) to achieve high Power factor with fast output voltage regulation. In this paper charge control technique and fuzzy logic control technique has been implemented which has some advantage like mathematical modeling is easy, flexible and fuzzy logic can model nonlinear functions etc., Comparative analysis of conventional PI based voltage controller to fuzzy based voltage controller for 90-230V input, 48V Output and 200W ac-dc converter operating at 100 kHz is presented and MATLAB/SIMULINK is used for implementation and simulation results show the performance improvement of proposed controller. © 2014 IEEE.
Asadi S.S.,Koneru Lakshmaiah College of Engineering |
Sree Ramulu Y.,KLUniversity |
Raju M.V.,VignanUniversity |
Ratnakar P.J.,Bundelkhand University
International Journal of Applied Engineering Research | Year: 2015
Urban congestion patterns have become ubiquitous and complex. Traditional and static approaches are no longer adequate for analyzing network flows and conducting minimum cost routing. Careful selection of routes is required for different purposes especially when population and traffic are at risk. One such purpose is shipping solid waste, which places public at risk. Due to urbanization, large quantities of waste are being generated and this needs an efficient transportation route for its disposal. The present study gives a GIS based decision support tool for optimal route analysis for transportation of solid waste generated in Hyderabad. The GIS tool provides effective decision support through its database management capabilities, graphical user interfaces and cartographic visualization. The present study offers optimal routes for solid waste transportation and an option to function on a desktop personal computer. The objectives of this project are to create a spatial digital database consisting Road network maps with the help of IRS-ID, PAN & LISS-III merged data and SOI toposheets, to create database consisting of traffic volume, vehicle density and details of solid waste and to evolve an optimal transportation route maps for efficient, safe and economic disposal of solid waste. The final optimal route is obtained using arc view network analyst extension available in arc view GIS. A decision support system is developed using GIS and VB 6.0 as a combination. This decision support system gives information of the present study by simply clicking the options present, as it is user friendly. The project results in giving optimal routes from the three transfer stations of Hyderabad to the dumping sites. A decrease in traffic density with less number of stops and turnings in these optimal routes resulted in more speed, less travel time and less cost making the routes efficient, effective and economic. © Research India Publications.