電源高調波規制に対応した高圧モータドライブ用トランスレス・ハイブリッドフィルタ

  • 近藤 亮太
    東京工業大学 大学院理工学研究科 電気電子工学専攻
  • 赤木 泰文
    東京工業大学 大学院理工学研究科 電気電子工学専攻

書誌事項

タイトル別名
  • A Transformerless Hybrid Active Filter Capable of Complying with Harmonic Guidelines for Medium-Voltage Motor Drives
  • デンゲン コウチョウハ キセイ ニ タイオウ シタ コウアツ モータドライブヨウ トランスレス ハイブリッド フィルタ

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抄録

This paper presents a transformerless hybrid active filter that is integrated into medium-voltage adjustable-speed motor drives for fans, pumps, and compressors without regenerative braking. The authors have designed and constructed a three-phase experimental system rated at 400V and 15kW, which is a downscaled model from a feasible 6.6-kV 1-MW motor drive system. This system consists of the hybrid filter connecting a passive filter tuned to the 7th harmonic filter in series with an active filter that is based on a three-level diode-clamped PWM converter, as well as an adjustable-speed motor drive in which a diode rectifier is used as the front end. The hybrid filter is installed on the ac side of the diode rectifier with no line-frequency transformer. The downscaled system has been exclusively tested so as to confirm the overall compensating performance of the hybrid filter and the filtering performance of a switching-ripple filter for mitigating switching-ripple voltages produced by the active filter. Experimental results verify that the hybrid filter achieves harmonic compensation of the source current in all the operating regions from no-load to the rated-load conditions, and that the switching-ripple filter reduces the switching-ripple voltages as expected.

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