Vector Control of Space Vector based Hybrid PWM fed IM Drive with reduced torque ripple

Voltage Source Inverter (VSI)-fed Induction Motor (IM) produces torque pulsations due to the presence of non sinusoidal voltages. Pulsating torques can be reduced by the pulse width modulation (PWM) technique employed. Special switching patterns applied by division of active and zero vector are implemented in Space-Vector(SV)-based PWM generation to reduce torque ripple. This paper brings up the design of a hybrid PWM fed drive with various combination of active and zero vectors switching to minimize the ripple torque considerably over Conventional SVPWM along with a reduction in ripple current. The simulation using Matlab platform and experimental results with dspace RTI 1103 are presented with a closed-loop controlled 2.2kw three phase IM drive.