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Abstract The thesis presents a detailed design information and performance characteristics of a parallel ferrosesonant circuit which can be used for A.C. Voltage stabilization. Chapter I gives An Introduction explaining the possibility of using the parallel ferroresonant circuit for voltage stabilizatiop. A detailed discussion of previous works in both the applicatio~ and ana lysis of the serios and parallel ferroresonnnt circuits. The method of analysis of the parallel ferroresonant circuit with an inductance core wh i.ch is assumed to have a single valued magnetization characteristic which neglects the inductance in the saturation domain. Chapter 2 gives Tho design and construction of the parallel ferroresonant circuit is describeds The experimental determination of the w ave forms of the voltages, currents and flux densities in the cor e is determined. Because of the distorted wave forms of the currents and voltages in the circuit, t ho Ro!·i.oS. values of these quantities are determined by me ans of a D.C. - A.C. thermal transfer voltmeter l - iii - Complete families of curves showing the effect of variation of circuit parameters as well as the load resistance on the output voltage is determined experimentally. An equation which relates the amplitude of the sinuisoidal input voltage \’/iththe parameters of the non-linear inductance and the saturation angle of the core is derived for both conditions of normal and over ey.citation. Chapter 3 gives The theoretical analysis of the parallel ferroresonant cir- cuit. This analysis is based on a set of n~n-linear differential equations wh Lch describe the behaviour of the circuit at any instant. Time intervals are found within half a period of sinuisoidal input voltage. from the wave forms of the flux denSity of the core within any time interval the core way have one of two conditions: saturated or unsaturated consequently the set of non- linear equations will become linear w i.t hi.n the limits of any interval. Expressions for current and voltage in the circuit and also the boundary angles between the time intervals are determined with the aid of Laplace ~ransfmrmation for every interval. FinallY an expression for the average value of the output voltage in terms of the circuit para ...eters as weLl,as the amplitude of the sinuisoi~al input voltage is derived. A comparison between expe ri aent al, and theoretical results is discussedo |