Direct Torque Control of Induction Motor using3 Level and 5 Level PWM Inverter
Keywords:
ultilevel inverter, diode clamped multilevel inverter, direct torque control(DTC),space vector pulse width modulation (SVPWM), torque ripple, flux ripple.Abstract
Multi-level inverter technology is being used in multitude of high-voltage, high-power energy
systems which include high-power drive applications for electric vehicles,mills, conveyors, pumps, fans,
blowers, compressors, etc. Multilevel inverters offer considerable inherent advantages as compared to
their two-level counter parts.Multi-level inverter circuit is obtained by connecting number of smaller
discrete voltage sources so they generate the output voltage waveforms with more steps of smaller
magnitudes, which is more closer to sine wave. The problems associated with two level inverters are
electromagnetic interference, switching losses, switch voltage stress, and harmonic distortion.
Field Orientation Control and Direct Torque Control are two well-known, high performance methods for
speed control of induction motors Out of these two methods motor control by direct torque control has
become more popular.It gives high dynamic performance of instantaneous electromagnetic torque. The
major attributes of DTC method are ability to achieve fast response of torque and flux, simple control
scheme, less computational requirements and offers decoupled control of torque and flux. Work
presented in this paper deals with simulation of Direct Torque Control of Induction Motor Drive using
Three Level and Five Level PWM Inverter using Diode Clamped Multilevel Inverter topology,
simulations of are carried out in MATLAB/SIMULINK
