CONSTRUCTION AND RESEARCH OF DIRECT TORQUE CONTROL SYSTEM MODEL FOR TORQUE FLUCTUATION MINIMISATION

Principles of construction and functioning of the direct torque control systems of asynchronous motor are observed. The classical DTC model with torque and flux hysteresis regulators, and DTC model with torque and flux PI-regulators and space-vector pulse-width modulation is resulted. In paper research results of two DTC system algorithms in MATLAB program environment are presented. As a result of modeling, workability of the offered algorithm is shown, advantages and high efficiency of DTC systems are noted. The obtained torque graphs show considerable decrease in fluctuation in DTC system with space-vector pulse-width modulation.