Influence of Torque Ripple Caused by Current Harmonics on Induction Motor Fed PWM Inverter

PWM 인버터로 구동되는 유도전동기 시스템에서 고조파가 토오크 맥동에 미치는 영향에 관한 연구

It is necessary to analyze exactly the torque ripple components in the harmonics as to decrease the torque ripple. Lower harmonics influence mainly on torque ripple. Among the harmonics, the pairs of 5's, 7's and 11's, 13's are dominant, and the magnitude of each pairs of current harmonics are very significant. Therefore, for decreasing the torque ripple, current harmonic pairs of 6n ${\pm}$1's orders must be simultaneously eliminated. In the case of eliminating one of current harmonic pairs, even though the magnitude of the current harmonics is small, It has great effect on torque ripple.