Method of application of analytical solution of the piecewise linear approximation of magnetization curve on the example of calculation the peak-transformer parameters

Abstract

The purpose. Paper purpose is working out of a technique of the solution of nonlinear problems in an analytic form, namely a piecewise linear approximation of magnetization curve of a magnetic circuit by discontinuous functions, and the solution of the nonlinear differential equation for an electric circuit which contains this type of device. For an example of use of a technique the approximate calculation of the peak-transformer working in a regime of saturation of a magnetic circuit is resulted. Methodology. By working out of a technique of piecewise linear approximation in the capacity of the basic mathematical apparatus individual discontinuous functions were used. Calculation of a nonlinear problem for a current finding in the transformer was analogous to a nonlinear problem for magnetic field strength finding in a ferromagnetic. Results. The design procedure of currents and voltage of the transformer working in a regime of saturation, on the basis of analytical record of a piecewise linear approximation of magnetization curve of a magnetic circuit is developed. Originality. For the first time with reference to the characteristic of magnetization of the peak-transformer the method of piecewise linear approximation is applied. Practical value. The offered technique can be directly used for electromagnetic calculation of peak - transformer as a part of the general (operated) electrotechnical device at a design stage and optimization.