Voltage source inverter (VSI) fed induction motors
are widely used in variable speed applications. Space Vector
Pulse Width Modulation (SVPWM) has become the successful
techniques to construct three phase sine wave Voltage Source
Inverter (VSI) parallel to control three-phase induction motor
using v/f control. Because of the low maintenance and
robustness induction motors have many applications in the
industries. The speed control of induction motor is more
important to achieve maximum torque and efficiency. VSI fed
induction motor produces a pulsating torque due to the
application of non sinusoidal voltages. Among the various
modulation strategies Space Vector pulse width Modulation
Technique is the efficient one because it has better spectral
performance and output voltage is more closed to sinusoidal.
Torque pulsation is strongly influenced by PWM technique
used. This paper compares the torque ripples of convectional
space vector PWM with hybrid PWM techniques. In hybrid
PWM both continuous PWM and discontinuous PWM
techniques are employed. The open loop V/f control of
induction motor with hybrid PWM shows better reduction in
torque ripples when compared with conventional space vector
PWM technique. The simulated design is tested using
MATLAB