A Time-Frequency Analysis on the AC-side Currents in the Three-Phase Current-Fed Inverter for Line Interactive Systems

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  • 系統連系三相電流形インバータにおける交流側電流の時間周波数解析
  • ケイトウレンケイ サンソウ デンリュウケイ インバータ ニ オケル コウリュウガワ デンリュウ ノ ジカン シュウハスウ カイセキ

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Abstract

– Three-phase current-fed inverters for line interactive systems operated by a two-phase PWM scheme offers relatively low switching times, and low switching losses in comparison to that operated by a three-phase PWM scheme.However, the harmonics involved in the ac-side currents produced in the two-phase PWM scheme are distributed over a wide frequency range, which can be a significant drawback depending on its applications. In this paper, compare the AC-side harmonics on the PWM schemes for the three-phase current-fed converter using a wavelet transform.

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