An important requirement in modelling of Switched reluctance motor (SRM) i s the knowledge of its flux-linkage characteristics. Idealisation of the flux-linkage characteristics will result in a model which cannot predict the performance of the machine with safficient accuracy. It is necessary therefore to determine fludinkage characteristics as closely as &sible. In this paper, the method of finding the flux-linkage characteristics is explahed. The same is demonstrated on a commercially available 4 Kw, 8/6 pole OULTON SUM The validity of the test result is cheeked by compnthg the Static torque characteristics based on the measured flux-linkage ch~nteteristios and compmhg it WM the experimentally measured Static torque characteristics. The sources of measurement error are discussed. JNTRODUCTION SRMs are drawing considerable attention for variable speed drive application, owing to its high energy conversion efficiency. It has sewed advantages over the C O W~X I~~Q I U~ AC and DC drives, namely, .simple and robust c o m e t i o n .brushless operation
This paper presents a method of finding the phase current profiles to get minimum torque ripple in Switched Reluctance Motor (SRM) with maximum torque per ampere. The solutions are obtained with peak current limit, finite rise time due to incremental inductance of the phase windings, and the back emf. As these factors are taken into account in obtaining the solution the implementation do not experience the voltage saturation for all the torque levels up to the rated torque. The solutions are obtained using the flux-linkage characteristics and the static torque characteristics. The influence of speed and the bus voltage on the solutions are discussed. All these results are compared with the results obtained by neglecting the effect of inductance and back emf effect. The implementation of the results are carried out on a 4 KW, 4 phase, 8/6 pole OULTON motor using a microcontroller. The simulation and the experimental results are presented.
Stability studies of multi machine system are a major concern to power system engineers due to the increasing complexity involved. This paper deals with the application of a nonlinear technique called Dynamic Inversion, to TCSC for the improvement of stability of multi-machine system. The transient stability studies for various cases: without any controller, with 75% line compensation and with Dynamic Inversion technique, are compared. The critical clearing time as well as the maximum loading ability is also discussed. The result for the nonlinear controller is found to be better than all the other cases.
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