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In this paper Modelling, position detection and torque ripple analysis of switched reluctance motor(SRM) is investigated under variable loads. SRM is gaining popularity over conventional induction motors with its simple structure, high reliability and high speed operations. Nonlinear mathematical model of a 8/6 SRM is developed in this paper. Operation of asymmetrical converter fed to SRM is also elucidated. Proposed drive is controlled by a PI controller, the need of rotor position in flux estimation is also presented in this paper. The proposed drive is simulated in MATLAB Simulink under variable load conditions. In simulation effect of load on source current, torque, torque error, speed, and speed error is analysed.

Abstract-Node isolation is one of the fundamental metrics in the design consideration and evaluation of wireless ad hoc network. This paper is aimed to introduce a statistical framework for the computing of the isolation probability of a randomly chosen node in a wireless network. The statistical framework is proposed in the context of lognormal shadowing on Nakagami fading for multiple inputs multiple output schemes. In this work, the focus is on path loss component, network topology, node density and performance of a node. The performance of connectivity between nodes in a dense network are analysed by deriving analytical models. Analysis of experimental results indicate that they are useful in estimating connectivity issues and implementing more secure wireless ad hoc networks.