Reduction of Torque & Flux Ripple of 3-Ф Asynchronous Machine Using Multi-Level Inverter
This paper proposes a approach in direct torque control (DTC) i.e. the applied voltage is a function of rotor speed and describes a new switching state algorithm which gives an optimum flux & torque ripple at steady state condition & fast dynamic torque response . This approach is applied to two-level and three-level inverters. Simulation results for proposed two level DTC and proposed three level DTC techniques for various speed conditions (very low, low, rated, and high speeds) are compared. The proposed two level and three level inverters fed three phase asynchronous machine using Micro Controller in open loop is implemented through hardware realization.
M. V. G. Vara Prasad, R. S. Ravi Sankar, Dr. K. Alice Mary