Research on Intelligent Soft Starter of Asynchronous Electromotor

Synthesis of the system for minimizing losses in asynchronous motor with a function for current symmetrization

“…It is known that despite their advantages, asynchronous motors have high energy indicators only when operating under nominal mode. Deviations from the nominal operating mode of AM associated with load reduction lead to a significant deterioration in the energy performance of the motors [3,4]. Electric drives with a thyristor voltage converter enable solution of this problem.…”

Synthesis of the methods of research of stability of the electric drive “thyristor voltage converter – induction motor

“…The features of the processes in a large oscillations mode suggest that their occurrence is associated not so much with a change in the velocity of the rotor but with the vibrational movement and the interaction between generalized vectors of the circuit voltage and the EMF of stator windings, as well as with the stator and rotor linkage [2,4]. Fig.…”

“…The need to evaluate the influence of various factors and parameters of ED on the character of oscillatory processes of an open-loop system of ED TVC-IM, in its turn, determines the need to design new methods of research of its stability [1][2][3][4][5][6].…”

“…Substantial non-linearity, introduced by valves, is taken into account due to the approximation of the output voltage of the TVC. The equations of the amplitude of the voltage of the first harmonic U 1 , derived in the process of identification, have the form [13]: (2) taking into account the recommended restrictions:…”

“…During the linearization of mechanical characteristic in the area 0<s<s n , the electromechanical time constant can be found [17]: (12) where J S is the aggregated reduced inertia torque of ED, kg×m 2 . − + +     TVC 2 1 1 1 1 2 2 1 1 2 2 1 k k A 1 2 1 a (A 2A ) , T T T J T T ϕ S     w = + − + + w         2 TVC 2 1 1 0 2 1 2 2 1 2 2 1 2 1 k k A 1 1 a A .…”