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Chennai, India

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

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. Source

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

Widgery D.,ESAB Group
Welding in the World

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. Source

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

Lukose G.S.,Robert Bosch GmbH | Paramasivam S.,ESAB Group | Vijayakumar M.,Jawaharlal Nehru Technological University Anantapur
SAE International Journal of Alternative Powertrains

The switched reluctance motor (SRM) driver is receiving increasing attention from various researchers as well as industry as a viable for adjustable speed and servo applications. Combining the unique features of an SRM with simple and efficient power converter that in use, a superior motor drive system emerges which may be preferable for many applications compared to other AC or DC motor driver systems. Although a number of converters have emerged over the years for SRM drives, but every single driver has its own advantages and drawbacks and there has always been a trade-off between gaining something of the advantages and losing some when a new driver is offered. This paper presents a review of various research about SRM driver converters, for power quality and torque improvement, in last 20 years, in the area of modeling, simulation, static, dynamic analysis, different control schemes like power factor correction, quasi resonant switching, various demagnetization techniques for field current etc. Copyright © 2014 SAE International. Source

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