誘導電動機駆動用平滑回路なし電圧形インバータのコンバータ電流制御法とその運転特性

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タイトル別名
  • Characteristics of New Current Controlled PWM Rectifier-Voltage Source Inverter without DC Link Components for Induction Motor Drive
  • ユウドウ デンドウキ クドウヨウ ヘイカツ カイロ ナシ デンアツガタ インバータ ノ コンバータ デンリュウ セイギョホウ ト ソノ ウンテン トクセイ

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抄録

The voltage-source inverters are normally equipped with an electrolytic capacitor in their DC link. The electrolytic capacitor has several disadvantage such as increasing size, limitting converter life and reliability. Therefore, several approaches for removing the DC link capacitor have been studied. This paper proposes a new strategy of the voltage source inverter without DC link components. To restrain the current resonance caused by LC filter of AC source side, rectifier of this inverter is controlled by current closed loop with di/dt feedback (di/dt; differenciation of AC source current). To improve AC source current waveform, feedback gain of di/dt and LC parameters are investigated by calculation for a 0.75kW induction motor driven by this inverter. Both the calculated and measured waveforms of AC source currents maintain nearly sinusoidal waveforms with a unity power factor.

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