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This paper presents a torque ripple reduction technique of direct torque control(DTC) for high power induction motors driven by

3-level Inverters with the inverter switching frequency limited around 0.5-1kHz level. It is noted that conventional DTC algorithms to

reduce torque ripple are devised for applications with relatively high switching frequency above 2-3kHz. A new DTC algorithm, 

especially for low switching frequency inverter system, illustrates relatively reduced torque ripple characteristics. Simulation and experimental results show the effectiveness of the proposed control algorithm.