Kānchipuram, India
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Anbarasi Jebase G.D.,Sathyabama University | Paramasivam S.,ESAB Group
Proceedings of IEEE International Conference on Circuit, Power and Computing Technologies, ICCPCT 2013 | Year: 2013

The rising need for clean energy and the drastic fall in fossil fuels urges everyone to think for a alternative energy sources for better power production. Vast development of power electronic converters also triggers off to find converting energy from renewable sources mostly from wind and solar basis and interfacing them with the power grid or any stand alone loads. Here the various components in the wind electric generation are modeled and the related scopes are outlined using Matlab with the proper protection circuits. © 2013 IEEE.

Jebaseeli E.A.E.,Sathyabama University | Paramasivam S.,ESAB Group
Lecture Notes in Electrical Engineering | Year: 2015

In developing electrical machines, temperature limits is a key factor which affects the efficiency of the overall design. Since it is expensive to load and find temperature in an electrical machine conventionally, the estimation of temperature rise by various techniques became increasingly important. In the present paper, temperature rise is estimated using finite element method. A 2-D steady state analysis is carried out on an 8/6 Switched Reluctance Machine to observe the temperature distribution and maximum temperature. For the transient thermal analysis, the load corresponding to maximum temperature is taken as initial condition. From the transient analysis, heat distributions at various load steps are observed. Simulation results are presented under steady state and transient conditions and are validated experimentally. Comparisons with experimental results obtained with a 2 H.P. Switched Reluctance Machine show the effectiveness of the developed model to predict the temperature rise for a range of operating conditions. © Springer India 2015.

Jebaseeli E.A.E.,Sathyabama University | Paramasivam S.,ESAB Group
Proceedings of 2015 IEEE International Conference on Electrical, Computer and Communication Technologies, ICECCT 2015 | Year: 2015

In the new century, thermal analysis has received more attention to ensure the design of more efficient motors in terms of loading conditions, cost and size. From the design to its manufacture, temperature rise is considered as an important parameter in any electrical machine. This has also a significant effect on the long term stability of the machine. Conventionally, the thermal analysis has been carried out using Lumped parameter Thermal Model or Finite Element Analysis. All the proposed techniques depend on the computation of losses and thermal resistances which is a difficult task. Hence based on the real time temperature measurement carried out on a 8/6 pole Switched Reluctance Machine at different loading conditions, a new technique is suggested to predict the thermal behaviour using the statistical tool such as Regression analysis. Using these polynomial equations, temperature can be predicted at any operating condition without wastage of power and time. © 2015 IEEE.

Meenakshi V.,Sathyabama University | Paramasivam S.,ESAB Group
International Journal of Control Theory and Applications | Year: 2016

In support of Advanced Energy Initiative objective to expand the use of wind energy. Wind energy use expanded in the wake of oil shortages and environmental concerns. Wind is a renewable power source, and overall, using wind to generate energy has fewer environmental impacts than many other energy sources. Wind turbines do not release emission that can pollute the air or water, and they do not want water for cooling purpose. Wind energy system may also reduce the amount of electricity generated from fossil fuels, which reduces the total amount of atmosphere greenhouse gasses, carbon dioxide emissions, and water used for electricity generation. This paper intends in comparing the total harmonic distortion (THD) for Permanent Magnet Synchronous Generator (PMSG) and Doubly Fed Induction Generator (DFIG) and has been implemented in MATLAB/Simulink interface.

Susitra D.,Sathyabama University | Paramasivam S.,ESAB Group
International Journal of Power Electronics | Year: 2014

This paper presents a non-linear inductance profile estimation of a Switched Reluctance Machine (SRM) using real-time applicable modelling techniques. The estimation techniques are based on regression analysis and Adaptive Neuro-Fuzzy Inference System (ANFIS). Mathematical models of phase inductance L(I,è) using both the techniques have been successfully tested for various values of phase currents (Iph) and rotor positions (è) of a non-linear SRM. It is observed that the proposed techniques are highly suitable for inductance L(I,è) modelling of SRM, which is found to be in good agreement with the training data used for modelling. © 2014 Inderscience Enterprises Ltd.

Susitra D.,Sathyabama University | Paramasivam S.,ESAB Group
Journal of Intelligent and Fuzzy Systems | Year: 2014

A Non-linear flux linkage model of a Switched reluctance Machine (SRM) has been developed using two different real time applicable modelling techniques and presented in this paper. The techniques are based on Multivariate nonlinear regression (MVNLR) and adaptive neuro fuzzy inference system (ANFIS). The best features of MVNLR and ANFIS are utilized in this research to develop the computationally efficient flux linkage model for SRM. Mathematical models for the phase flux linkage ψ(i, θ) using MVNLR and ANFIS have been successfully arrived, tested and presented for various values of phase currents (Iph) and rotor positions (θ) of a non linear SRM. It is observed that MVNLR and ANFIS are highly suitable for flux linkage ψ(i, θ) modelling of SRM which is tested to be in good agreement with the training data used for modelling. © 2014 - IOS Press and the authors. All rights reserved.

Jebaselvi G.D.A.,Sathyabama University | Paramasivam S.,ESAB Group
Renewable and Sustainable Energy Reviews | Year: 2013

The most alarming feature today is how to manage the energy demand and crucial climate change. To run life among these major threats, a good idea is to penetrate renewable energy sources gradually into the global energy market. These renewables are the best alternative to conventional fuels because of their abundant potential, non-pollutant nature and are exceedingly eco-friendly with the environment. The major renewables include wind, solar and diesel energy sources with a safety battery back-up to challenge the energy disaster to a possible extent. In addition, minor sources like fuel cells, biomass and tidal energy can also be included if the load demand is high. The careful blending of these available resources and technologies facilitate economic and environmental benefits. This paper overviews the performance analysis of hybrid power systems, control methodologies and modeling techniques so as to get an optimum output power.

Janakiraman R.,Sri Ramanujar Engineering College | Janakiraman R.,Jawaharlal Nehru Technological University Anantapur | Paramasivam S.,ESAB Group
International Review on Modelling and Simulations | Year: 2013

This paper presents simulation approach for the performance analysis of self-excited induction generator (SEIG) for wind power application. The analysis like flux distribution, flux density distribution, and torque and force calculations through 2D finite element analysis (FEA). An induction machine model considered as phase voltage, phase angle calculations through ANSYS simulation. At the beginning, a numerical calculation of the magnetic field distribution of self-excited induction machine, under consideration is carried out. The results of numerical calculations are to be presented through ANSYS simulation and an evaluation of the steady state behavior of the self-excited induction generator is presented for the wind power application. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.

Widgery D.,ESAB Group
Welding in the World | Year: 2010

With the increasing use of thermomechanically processed steels for pipelines, the alloy content of each steel grade decreases from year to year. Using welding processes which result in high dilution of the weld metal by parent material, such as conventional submerged arc welding, it becomes increasingly difficult to achieve the very high weld metal yield strength demanded when welding X80 and X100 steels, especially when strain-based design is used. For X80 steels, submerged arc welding with tubular wires and with twin arcs can allow high productivity to be maintained while limiting the heat input and dilution, and satisfactory results produced by this route are presented. Special boron-containing wires can also be used where high dilution cannot be avoided. For X100 steels, the use of gas metal arc welding with a fixed welding head and a rotating pipe, combined with a narrow bevel preparation, allows excellent mechanical properties to be achieved without excessively high alloy contents in the welding wire. Because of the small joint volume, productivity need not be unduly lower than that of submerged arc welding. Substitution of metal-cored tubular wire for solid wire can give a further increase in productivity.

Worn embedded tram rails are repair welded without preheating to prevent the embedding materials from overheating and because the embedded location doesn't facilitate applying preheat. Consequently a very careful and cautious welding technology is necessary to succeed in surface welded tram rails properly. This study is aimed at revealing the microstructure changes that take place in the HAZ of the weld during the entire surfacing process through recorded t-T diagrams, hardness measurement and microstructure analysis. The paper formulates several conclusions regarding the weldability and gives practical recommendations for the various sections of embedded tram rail in curves.

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