CALCULATION OF A MAGNETIC FIELD IN A PRISM OF RECTANGULAR SECTION A METHOD OF THE SPATIAL INTEGRATED EQUATIONS
The efficiency of the method of spatial integral equations in the calculation of quasi-stationary electromagnetic fields of electrical devices. To do this, in the space-time domain, the task of calculating the distribution of the magnetic field in a solenoid with rectangular ferromagnetic core. On the basis of earlier analytical solutions of the model problem for the calculation of electromagnetic field distribution in three-dimensional setting for the system, which includes portions of the conductive ferromagnetic, magnetic properties are determined by the magnetization curve  and winding fed from a current source, an algorithm for the calculation using the spatial integral equations. The possible factors influencing the accuracy of the calculation. The proposed model for the calculation of quasi-stationary electromagnetic field, based on the method of spatial integral equations allows to obtain accurate results. Based on it, you can not only analyze the distribution of the electromagnetic field inside the ferromagnetic regions, but also to calculate the integral characteristics: the flux linkage, electromagnetic force, etc. The latter can obtain an acceptable accuracy and spatial sampling enlarged. This can be useful for rapid analysis of work processes in electromagnetic devices.