S Ziaeinejad - Iran University of Science and Technology, Tehran, Iran
Y. Sangsefidi - Iran University of Science and Technology, Tehran, Iran
A Shoulaie - Iran University of Science and Technology, Tehran, Iran

In this paper, direct torque control of symmetrical two-phase induction motors using two- and three-leg inverters is analyzed and utilizing four-leg inverter is proposed. Essentialequations for controlling both torque and flux are presented and switching tables are derived. Different inverter topologies arecompared from the view point of switching frequency and the operation of control system in high speed applications. Performed analysis and calculations are validated by dynamic simulation.

two-phase induction motor, two-leg inverter, three-leg inverter, four-leg inverter, direct torque control