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Villupuram, India

Jagan A.,Surya Group of Institutions | Nagarajan V.,Adhiparasakthi Engineering College
Przeglad Elektrotechniczny | Year: 2013

This paper proposes an Elliptic Curve Cryptography (ECC) co-processor over GF(2256), based on the Montgomery scalar multiplication algorithm and provides a comprehensive evaluation of the architecture when different multipliers are involved in the scalar multiplication. The multipliers, namely array multiplier, modified Booth multiplier and hybrid encoded low power (HELP) multiplier are considered for the study. The proposed architecture is designed using Spartan3E family device XC3S1600E and synthesized using Modelsim 5.7. Source

Thamizharasan S.,Surya Group of Institutions | Baskaran J.,Adhiparasakthi Engineering College | Ramkumar S.,RMD Engineering College | Jeevananthan S.,Pondicherry Engineering College
IET Power Electronics | Year: 2014

A new single-phase H-bridge multilevel inverter (MLI) topology constructed using auxiliary reverse-connected voltage sources along with a hybrid pulse width modulation (PWM) strategy is proposed, to extract a variable frequency variable amplitude output voltage. The principle eschews an astute philosophy to employ PWM approach only for a particular Hbridge that serves to produce the desired level while the remaining add-on modules function with the theory of fundamental switching. It involves the use of reduced number of switching devices for a specific number of output voltage levels in comparison with conventional MLIs. The design of the hybrid PWM suitable to power the appropriate switches add strength to its formulation in the sense it requires only either addition or subtraction to generate the square wave modulated pulses for the power devices in the other units other than that responsible for offering the preferred level of output voltage. The MATLAB R2010b-based simulated performance adequately validated through experimental results foresee the emergence of a new variety of MLIs and forge a different dimension for inverter interfaces in power control applications. © The Institution of Engineering and Technology 2014. Source

Thamizharasan S.,Surya Group of Institutions | Baskaran J.,Adhiparasakthi Engineering College | Ramkumar S.,RMD Engineering College | Jeevananthan S.,Pondicherry Engineering College
International Journal of Electrical Power and Energy Systems | Year: 2013

This paper attempts to construct a new hybrid multilevel dc-link inverter (MLDCLI) topology with a focus to synthesize a higher quality sinusoidal output voltage. The idea emphasizes the need to reduce the switch count considerably and thereby claim its superiority over the existing multilevel inverter (MLI) configurations. The structure incorporates a new module along with a differently used H-bridge that facilitates the increase in levels with much lower switch counts. The proposed dual bridge MLDCLI (DBMLDCLI) is evaluated using phase disposition (PD) multi-carrier pulse width modulation (MC-PWM) strategy in a filed programmable gate array (FPGA) platform. The MATLAB/System generator based simulation results validated through FPGA based prototype for a typical output level exhibit the drastic enhancement in the quality of output voltage. The total harmonic distortion (THD) obtained using a harmonic spectrum reveals the mitigation of the frequency components of output voltage other than the fundamental and paves the way to open a new avenue for nurturing innovative applications in this domain. © 2012 Elsevier Ltd. All rights reserved. Source

Sankar M.,Surya Group of Institutions | Baskaran R.,Anna University | Rajkumar K.,SSN College of Engineering
Applied Mechanics and Materials | Year: 2014

In this paper, attempts have been made to model and optimize process parameters in Abrasive assisted Electro-Chemical Machining (AECM) of Aluminium-Boron carbide-Graphite composite using cylindrical copper tool electrodes with SiC abrasive medium. Optimization of process parameters is based on the statistical techniques with four independent input parameters such as voltage, current, reinforcement and feed rate were used to assess the AECM process performance in terms of material removal rate. The obtained results are compared with without abrasive assisted electro chemical machining of Aluminium-Boron carbide-Graphite composite. Abrasive assisted ECM process exhibited higher material removal rate from composite material when compared with without abrasive assisted ECM. © (2014) Trans Tech Publications, Switzerland. Source

Thamizharasan S.,Surya Group of Institutions | Baskaran J.,Adhiparasakthi Engineering College | Ramkumar S.,RMD Engineering College
International Review of Electrical Engineering | Year: 2014

The paper attempts to formulate a pulse width modulation (PWM) strategy suitable to operate the switches at high frequency in the dual bridge multilevel dc link inverter (MLDCI). It follows the theory of sub harmonic pulse width modulation (SHPWM) to involve a direct comparison between the sinusoidal reference and several stacked high frequency triangular waveforms. It charters to create a negative cycle inversion (NCI-HPWM) based single reference and avail the phenomenon of single carrier modulation strategy to pronounce a better synthesis of the output waveform. It forges to outline the locus for fundamental switching of the lower part of the power module in an effort to ensure it remains within the boundaries of the operating region. The scheme investigates using Matlab based simulation the proposed NCI-HPWM methodology for an 11- level inverter, and establishes its benefits in terms of the frequency spectrum. It includes detailed FPGA based experimental waveforms to orchestrate the feasibility of the mechanism for use in practical circuits. © 2014 Praise Worthy Prize S.r.l. -All rights reserved. Source

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