特點  
    SIRIUS 3RW40采用擁有權的全新控制技術－“相位平衡”。該控制技術能夠防止兩項控制軟起動器中的直流成分。對于兩相控制軟起動器 ，來自兩個控制相位的電流會流經未受控制的相位。因此，從純粹的物理角度來看，在電機起動時，三相電流會不對稱。這雖然不受影響，但 在大多數應用中仍不可忽視。除了這種不對稱性之外，如果在兩個控制相位中控制功率半導體器件，則會產生直流成份。在起動電壓低于50%時，則會造成電機中出現噪音。“相位平衡”技術則能夠可靠避免電機起動時的這些直流成份。它可就轉速、轉矩和電流增量方面生成統一的電機起動特性。并且起動噪聲質量和控制三個相位的起動設備一樣。這可通過連續動態調整和均衡電機加速時不同相位的半波電流實現。  ：  /

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