Space-Vector-Based Hybrid PWM Technique to Reduce Peak-to-Peak Torque Ripple in Induction Motor Drives


Constant-volts-per-hertz induction motor drives and vector-controlled induction motor drives utilize pulsewidth modulation (PWM) to manage the voltage applied on the motor. The strategy of PWM influences the pulsations in the torque developed by the motor. A house-vector-primarily based approach to PWM facilitates special switching sequences involving the division of active state time. This paper proposes a space-vector-based hybrid PWM technique, which could be a combination of the conventional and special switching sequences. The proposed hybrid PWM technique ends up in a lower peak-to-peak torque ripple than typical space vector PWM (CSVPWM) at high speeds of an induction motor drive. Furthermore, the magnitude of the dominant torque harmonic thanks to the proposed hybrid PWM is significantly not up to that due to CSVPWM at high speeds of the drive. Experimental results from a 3.seventy five-kW sensorless vector-controlled induction motor drive below numerous load conditions are presented to support analytical and simulation results.

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