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Articles by R. Arumugam
Total Records ( 7 ) for R. Arumugam
  S. Balamurugan and R. Arumugam
  This study discusses a simple algorithm for estimation and reduction of Vibrations in a Switched Reluctance Motor (SRM) using magnetic circuit simulation in MATLAB/SIMULINK Environment. A Non-linear model is developed using magnetic circuit equations, wherein non-linearity is added using inductance profile with back EMF. Dynamic characteristic of the SRM is simulated and the same is being verified experimentally. In this simulation, both current and voltage control techniques are used to control the SRM. Fast Fourier Transform is used to analyze Electromagnetic torque in Frequency domain, which gives the mechanical and magnetic vibration frequencies and their dB magnitude. The complete simulation and experimental results are presented.
  B. Justus Rabi and R. Arumugam
  This paper presents an Impedance Source Inverter for A.C electrical drives. The impedance source inverter employs a unique impedance network couple with inverter main circuit and rectifier. By controlling the shoot-through duty cycle, the z-source inverter system using MOSFETS provide ride-through capability during voltage sags, reduces line harmonics, improves power factor and high reliability, and extends output voltage range. Analysis, simulation, and experimental results will be presented to demonstrate these new features. It reduces harmonics, electromagnetic interference noise and it has low common made noise
  B. Justus Rabi and R. Arumugam
  Harmonics cause major problems in power system due to non linear loads. With the rapid growth in the utilization of rectifier for critical loads, e.g. in computer or medical equipment the need for high quality uninterruptible power is increasing. Non-linear current drawn by the rectifier loads distort the output of UPS system. Mainly because of output filter impedance in UPS. A distorted output voltage will result in reduced dc-bus voltage or rectifier loads and may lead to excessive losses and heating. The main objective of this study is to eliminate harmonics and reduce the power loss in inverters. The harmonic separation process is implemented with a processor an achieves low THD using Blind Signal separation .It is mostly used in medical instrumentation and medical applications like ECG, EEG.
  G. Venkatesan , R. Arumugam , M. Vasudevan , S. Paramasivam and S. Vijayan
  This study presents a novel Switched Reluctance Motor (SRM) drive system with power factor improvement. Recently, many of the converters with variable speed drives have no input power factor correction circuits. This results in harmonic pollution of the utility supply, which should be avoided. The effect of power factor variation in terms of harmonic content is also analyzed in this study. The different operations like single pulse, soft chopping and hard chopping modes are done with and without a power factor controller. This study describes the buck – boost converter topology with above said methods for SRM drive. The boost converter is used to improve the input sinusoidal current and the buck converter is used to regulate the dc source voltage. The proposed topologies were simulated using MATLAB / Simulink software package and the results were obtained. The computer simulation results support the proposed methods.
  N. C. Lenin and R. Arumugam
  The important problems to be solved in Linear Switched Reluctance Machines (LSRMs) are: (1) to design the shape and size of poles in stator and translator cores; (2) to optimize their geometrical configuration. A novel stator geometry for LSRMs that improved the force profile was presented in this study. In the new geometry, pole shoes were affixed on the stator poles. Static and dynamic characteristics for the proposed structure had been highlighted using Two Dimensional (2-D) Finite Element Analyses (FEA). Motor performance for variable load conditions was discussed. The finite element analyses and the experimental results of this study proved that, LSRMs were one of the strong candidates for linear propulsion drives. Problem statement: To mitigate the force ripple without any loss in average force and force density. Approach: Design modifications in the magnetic structures. Results: 2-D finite element analysis was used to predict the performance of the studied structures. Conclusion/Recommendations: The proposed structure not only reduces the force ripple, also reduced the volume and mass. The future study is to make an attempt on vibration, thermal and stress analyses.
  S. Manivannan , R. Arumugam , N.M. Sudharsan and S. Prasanna Devi
  This study presents an approach for the multiple linear regressions modeling of the flat plate heat sink using Taguchi Design of Experiments method. The responses studied were electromagnetic radiation and thermal resistance of the heat sink. The heat sink is modeled using Ansoft HFSS and Flotherm software for finding the emitted radiation and thermal resistance of the heat sink respectively. Experimental investigations were performed to find the thermal resistance and emitted radiations from the heat sink and thus the simulation model was validated with the experimental results. The simulations were continued for the combinations generated by the L27 (6 factors, 3 levels) Taguchi ’s Design of Experiments using Minitab software. The factors considered for L27 are the length and width of the heat sink, Fin height, Base height, Number of fins and fin thickness. The values of responses are used to develop Meta models for the heat sink using multiple linear regression analysis. Thus the developed meta models replaces the use of the above mentioned simulation software ’s for finding out the responses by saving the modeling, simulation time and cost of simulation software.
  K. Balaji , G. Thirumaran , R. Arumugam , K.P. Kumaraguruvasagam and P. Anantharaman
  The present study was carried out an marine ornamental invertebrate`s resources of Parangipettai coastal waters during the month of March-August 2006, which revealed the occurrence of 28 species of marine ornamental invertebrates belonging to 4 phyla. From this the species diversity was high during the month of April and May and it was decreased in March. The most abundant species recorded during the study period was fiddler crab Uca annulipes, while sea star Ludia maculata was very least in their abundance.
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