STUDYING THE EFFECT OF AN ADDITIONAL ACTIVE RESISTANCE IN THE FIELD WINDING CIRCUIT ON STARTING CHARACTERISTICS OF SALIENT-POLE SYNCHRONOUS MOTORS

• Published in: Electronics and electromechanics no. 2; pp. 18 - 23
• Main Authors: Malyar, V. S., Malyar, A. V.
• Format: Journal Article
• Language: English
• Published: Kharkiv National Technical University, Ukraine 01.01.2018; National Technical University "Kharkiv Polytechnic Institute"
• Subjects: asynchronous operation mode; boundary value problem; Differential equations; Equations of state; Mathematical models; salient-pole synchronous motor; spline approximation; Spline functions; starting resistance; Static characteristics; Steady state; Synchronous motors
• ISSN: 2074-272X; 2309-3404
• DOI: 10.20998/2074-272X.2018.2.03

On the basis of the developed method for calculating steady-state asynchronous operation modes of salient-pole synchronous motors, a procedure of mathematical modelling of the starting characteristics is proposed. The problem of calculating the steady-state asynchronous mode is solved as a boundary value one for differential equations of motor circuit electrical equilibrium. Algebraization of the system of differential equations is carried out by approximating the equations of state using cubic spline functions on a grid of period nodes, taking into account the periodic law of variation of the coordinates. This results in the changeover from continual values to nodal ones. The starting static characteristics are calculated using the parameter continuation method. The study of the effect of the starting resistance value on the asynchronous characteristics of the motor relied on a mathematical model of the motor taking into consideration real field circuits, saturation and asymmetry of the magnetic path.