Krishna Kumar C.,Jansons Institute of Technology |
Kumar N.,Bharatiar University in Power Electronics
International Review of Electrical Engineering | Year: 2012
This paper proposes new random modulation schemes to mitigate conducted Electromagnetic Interference (EMI) in Single-ended Primary-inductor converter (SEPIC). The effectiveness of randomization on spreading the dominating frequency was studied by carrying out simulations using the MATLAB software and by estimating output power spectral density (PSD). Furthermore, the effect of using the proposed randomization techniques on conducted- EMI characteristics of the SEPIC converter is simulated and experimentally investigated. A comparative study has been carried-out to understand the effect of proposed schemes on PSD and conducted-EMI mitigation. Experimental results confirm the validity of the estimated and simulation results, and demonstrate the effectiveness of applying the randomization schemes in reducing the conducted-EMI. The class- B International special committee on Radio Interference (CISPR 22) standard has been adopted for measurements. Both simulated and measured results agree well, based on which Constant Trailing Edge, Randomized Duty ratio and Randomized Pulse Position Modulation with Fixed Carrier Frequency (CTERDRPPMFCF) scheme was contemplated for adoption. © 2012 Praise Worthy Prize S.r.l. - All rights reserved.
Krishnakumar C.,Jansons Institute of Technology |
Muhilan P.,Periyar Maniammai University |
Sathiskumar M.,Periyar Maniammai University |
Sakthivel M.,Jansons Institute of Technology
Journal of Electrical Engineering and Technology | Year: 2015
Electromagnetic Interference (EMI) is a system to system or environment to system phenomenon. The literature survey proved that the Randomized Pulse Width Modulation (RPWM) technique is a promising technique to reduce EMI. A new Constant Trailing Edge, Randomized Pulse Width Modulation (CTERPWM) technique is proposed in this paper. The effect of the proposed RPWM technique for mitigation of conducted-EMI on Cuk converter operating in Continuous Conduction Mode (CCM) is simulated and tested. In this paper, the analytical expressions for the Power Spectral Density (PSD) are derived for the proposed RPWM technique and are validated by experimental measurements. The effectiveness of the proposed RPWM technique on the mitigation of conducted-EMI is verified comparing simulation and experimental results and it is identified that both the results are almost similar with allowable experimental deviations. The comparative investigation proves that the proposed RPWM technique can mitigate and spread the dominant peaks of conductedEMI over the complete spectrum for the Cuk converter. Based on the investigation the CTERPWM technique is recommended for adoption. © The Korean Institute of Electrical Engineers.
Rajiv Suresh Kumar G.,Alagappa Chettiar College of Engineering And Technology |
Mohana Sundaram K.M.,Jansons Institute of Technology
Research Journal of Applied Sciences | Year: 2014
Even though many solutions for WMNs to recover from wireless link failures have been proposed, they still have several limitations as follows. First, resource-allocation algorithms can provide (theoretical) guidelines for initial network resource planning. However, even though their approach provides a comprehensive and optimal network configuration plan, they often require "global" configuration changes which are undesirable in case of frequent local link failures. To overcome the above limitations, researchers propose an Autarchic Load Sharing System (ALSS) that allows a autarchic load sharing which allows reconfigure its local network settings assignment for real-time recovery from link failures. In its core, ALSS is equipped with a reconfiguration planning algorithm that identifies local configuration changes for the recovery while minimizing changes of healthy settings. © Medwell Journals, 2014.
Srinivasan C.B.,Jansons Institute of Technology |
Subramanian R.,Indian Institute of Road and Transport Technology
International Journal of Mechanical and Mechatronics Engineering | Year: 2014
Research is essential to be carried out to find the suitable alternative fuel to meet the energy demand with minimum environmental effect, because of fast depletion of fossil fuels. In future, the alternative energy systems be cost effective, environmental free, reliable, renewable, convenient and safe. In this review, positive features and limitations of using hydrogen as Spark ignition engine fuel is discussed in detail. Hydrogen is superior in many aspects over conventional fuels and produce satisfactory performance in engine applications. To meet the current restrictive emission norms, hydrogen will be one of the most important fuel in the near future. In this analysis, hydrogen engine fundamentals are described by examining the engine specific properties of hydrogen and the existing literature are surveyed. © October 2014 IJENS.