Electrical engineering & Electromechanics (Dec 2019)
NUMERICAL-FIELD ANALYSIS OF THE CHARACTERISTICS OF A THREE-PHASE MAGNETIC FIELD INDUCTOR FOR THE TREATMENT OF VARIOUS SUBSTANCES WITH CURRENT STABILIZATION
Abstract
Introduction. A three-phase magnetic field inductor (MFI) similar to the asynchronous motor stator, which provides processing of various substances, is considered. This is done by means of oblong ferromagnetic elements moving with a rotating magnetic field and located in its cylindrical working chamber. Problem. The aim of the work is to develop the theory and conduct practical calculations of the parameters and characteristics of the MFI that connect the electromagnetic quantities and their phase relationships in the mode of its load. Methodology. The studies are carried out on the basis of numerical calculations of the magnetic field in the MFI taking into account the ferromagnetic elements in its working chamber. The calculation model of the chamber is represented by a homogeneous anisotropic magnetic medium for which the method of determining different magnetic permeabilities by its longitudinal and transverse axes is given. In order to obtain the characteristics of the presented MFI, the method of determining the electromagnetic parameters and phase relationships of the quantities accompanying its operation has been developed. Results. The theory and results of numerical-field analysis of electromagnetic quantities, their phase relationships and corresponding characteristics of three-phase MFI are presented. Calculations of characteristics are made for the inductor load mode depending on the phase shift of the magnetomotive force of the stator winding relative to the longitudinal axis of the chamber and while ensuring the constant value of the current of this winding. The characteristics include magnetic flux coupling, EMF and stator winding voltage, phase shifts between them and current, electromagnetic moment, input and output power, electrical and magnetic loss power, power factor and efficiency. Practical value. The technique of numerical-field calculations of electromagnetic quantities and their phase relationships is developed, and also the set of characteristics which should promote designing and perfection of inductors of the considered type is received. The presented technique is universal as it allows to display their cores practically of any shape. References 11, figures 10.
Keywords
