Time filter

Source Type

Vaigundamoorthi M.,Anand Institute of Higher Technology
European Journal of Scientific Research | Year: 2011

The main objective of this work is to analyze and design the high efficient modified soft controlled (ZVS-PWM) Active- Clamping Cuk (buck- boost type) converter to extract maximum power from solar Photo Voltaic (PV) module. The solar PV module, Maximum Power Point Tracking (MPPT), ZVS based Cuk converter has been modeled and simulated in MATLAB/Simulink. Using Perturb and Observer (PAO) algorithm, the maximum power is tracked from solar PV module. In order to reduce the switching losses across the switches, the soft switching has been implemented for all the three active switches of modified Cuk converter, resulting in high conversion efficiency at high-frequency operation, improved transient ,steady state response without significant increase in voltage and current stresses on switches. Simulation results, theoretical analysis, principle of operation are presented in this paper for converter and the solar PV module of 85W, inputvoltage of 17.2V, and operating at 10KHz. © 2011 EuroJournals Publishing, Inc. Source

Ramesh Babu A.,Sathyabama University | Raghavendiran T.A.,Anand Institute of Higher Technology
Journal of Theoretical and Applied Information Technology | Year: 2014

This paper proposes the simulation and implementation of performance enhancement of two phase interleaved boost converter using Maximum Power Point Tracking (MPPT) algorithm to achieve maximum power for Photo Voltaic (PV) application. The output current is divided by two phase since current stress on each switch is reduced. Each switch is turn on by same frequency with phase difference of π. The output of PV panel is affected by temperature and insulation level, Hence conversion efficiency is very low. To improve the efficiency, additionally the MPPT controller is used in our proposed converter to efficiently draw the maximum power from the solar panel. The maximum power point is identified using Perturb &Observe (P&O) algorithm. The Perturb &Observe algorithm suitably to track the maximum power output of two phase interleaved boost converter with proper duty ratio. This paper present simulation and implementation procedure for two phase Interleaved Boost Converter with MPPT algorithm. The simulation results are obtained by using MATLAB/SIMULINK. The simulation results for non-isolated two stage interleaved high voltage gain boost converter were compared with and without MPPT. The MATLAB/simulink simulation results are presented to validate proposed converter. The hardware prototype of 12volt input 102 volt output has been developed. © 2005 - 2014 JATIT & LLS. All rights reserved. Source

Jenitta J.,Anand Institute of Higher Technology | Rajeswari A.,Coimbatore Institute of Technology
2013 IEEE Conference on Information and Communication Technologies, ICT 2013 | Year: 2013

New improved methods for denoising Electrocardiogram (ECG) signal are proposed based on adaptive filter with Empirical mode Decomposition (EMD) and Ensemble Empirical mode Decomposition (EEMD). EMD and EEMD methods are used to decompose the ECG signal into intrinsic mode functions (IMF). Performance of traditional EMU based denoising methods improved by adaptively processing the IMF components which are related to ECG noise. Convergence issue to Least Mean Square (LMS) algorithm addressed by EEMD based adaptive algorithm. Block least mean square (BLMS) algorithm used with EMD and EEMD to improve the computational efficiency of adaptive processing. Proposed methods are applied on white Gaussian noise added ECG signal and real time ECG signals obtained from physionet MIT-BIH arrhythmia data base. Signal to Noise Ratio (SNR) correlation co-efficient and Mean Square Error (MSE) are used to measure and compare the performance of proposed methods with traditional EMD based methods. All the experiments done with MATLAB based coding. Results show that EEMD with BLMS algorithm performs better than traditional EMU based methods. © 2013 IEEE. Source

Sumithra Devi M.,Anand Institute of Higher Technology | Arthi A.P.,Thangavelu Engineering College | Thamizharasan K.,Sir Theagaraya College
Superlattices and Microstructures | Year: 2014

Single crystal of semiorganic nonlinear optical material of pure and Mg2+ doped ZTS were grown by slow evaporation technique from its aqueous solution. The grown crystal was characterized by single crystal XRD to determine the cell parameters. The Mg2+ doped was characterized by SEM and EDX spectrum. The chemical composition of both the pure ZTS and doped Mg2+ crystals were determined by Fourier transform infrared (FTIR). The optical absorption spectrum recorded in the wavelength was ranged from 200 to 2500 nm and its energy gap (Eg) for both pure ZTS is 4.47 eV and doped Mg2+ is 4.42 eV. The mechanical strength of the grown crystal was found from Vicker's microhardness measurements. It showed that pure and doped ZTS crystals are soft in nature. The dielectric measurement was carried out to study the different polarization mechanism and conductivity of the crystal. Photoconductivity studies revealed that the positive photoconductivity of the both were considered as grown crystals. © 2014 Elsevier Ltd. All rights reserved. Source

Ramesh Babu A.,Sathyabama University | Raghavendiran T.A.,Anand Institute of Higher Technology
International Journal of Applied Engineering Research | Year: 2014

This Paper proposes simulation of closed loop controlled Zero Voltage Switched (ZVS) Continuous Conduction Mode (CCM) boost converter for load and source disturbance to achieve regulated DC output voltage. The diode reverse recovery related problems of conventional hard switched boost converter can be reduced by implementing Zero Current Turn-off of diodes in CCM boost converter. The switching losses are reduced by applying Zero Voltage Switched (ZVS) turn on of active switches in CCM. The ZVS turn on of main switch’s are achieved by use of resonant network in the proposed converter. Hence ZVS CCM boost converter reduces switching loss and voltage stress of the main switch. The boost converter output voltage is regulated by using closed loop PI controller with load and source disturbance. Simulation results are presented to validate the proposed converter using MATLAB simulink software. © 2014, Research India Publications. Source

Discover hidden collaborations