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電圧形インバータ駆動誘導電動機のトルク脈動低減PWM制御法 PWM method for reduction of torque pulsations of an induction motor driven by voltage source inverter 実成, 義孝 MINARI, Yoshitaka 篠原, 勝次 SHINOHARA, Katsuji 福元, 木草 FUKUMOTO, Mokuso 入佐, 俊幸 IRISA, Toshiyuki open access It is inevitable that the torque of an induction motor driven by a voltage source inverter contains many harmonic components. The instantaneous torque of the induction motor pulsates with six times the fundamental frequency in the sine-wave PWM system as compared to the fundamental sine-wave signals with a triangular carrier signal. This phenomenon is similar to an optimal PWM system using a sine-wave pattern. This pulsation is based upon a voltage vector pattern. A 6th harmonic signal of fundamental frequency is added to sine-wave signals of the sine-wave PWM system, in order to eliminate this pulsation. The instantaneous torque and current of the induction motor were computed by the state variable method. As a result of computation, the 6th harmonic pulsation of torque vanishes as compared with the sine-wave PWM system, or the optimal PWM system. In the same manner as the sine-wave PWM system, however, the inner small ripple remains in the waveform. It does not appear in the optimal PWM system. On the other hand, such a waveform as an instantaneous maximum torque constant is shown by the use of a modification of the optimal pattern. In this case, the bottom of the torque waveform varies by six times to the fundamental frequency. The motor current is a sinusoidal waveform as is the sine-wave PWM system in all the patterns. 鹿児島大学 Kagoshima University 1989-11 jpn departmental bulletin paper VoR http://hdl.handle.net/10232/11482 https://ir.kagoshima-u.ac.jp/records/10601 0451212X AN00040363 鹿児島大学工学部研究報告 The research reports of the Faculty of Engineering, Kagoshima University 31 45 51 https://ir.kagoshima-u.ac.jp/record/10601/files/AN00040363_v31_p45-51.pdf application/pdf 1.3 MB 2016-10-28 1989-11