| 摘要 |
PURPOSE:To suppress the variation in the DC bus voltage to the minimum by displacing the power drive and regenerative times by suitable time by inverters. CONSTITUTION:Output frequency command values f11, f12, f13, f2 which include power drive and regenerative information of inverters are outputted by power drive and regenerative start signal shifter 80 which inputs the output frequency command values f1, f2... of inverter group which include power drive, regenerative and output frequency information of inverters and displaces the varying points of the power drive and regenerative signals of the inverter between inverters 9a, 9b, 9c, 9d... at the time point when the power drive, regenerative commands of the inverter group vary so that the varying point of the power drive and regenerative signals become minimum in the variation in the DC bus voltage Vdc. |
