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西德慕尼克电梯停电应急驱动装置(EDS)的作用是当电源突然中断时,由蓄电池供电的备用逆变器可确保电梯继续运行。逆变器由于采用大功率晶体管,具有无需另增辅助换流电路的自关断能力,饱和压降又小,因此电路结构简单,使EDS装置具有体积小,重量轻、效率高和噪声低等优点。一、EDS结构图1示出EDS结构框图。对于三相交流输入电源停电后,主电路电压下降至50%之前的瞬间,轿厢能继续运行。在此间EDS系统改由蓄电池提供直流电源,通过应急驱动控制回路及晶体管逆变器,向主电路供电。根据失相监控环节测出停电,采用微机
The function of West Germany's elevator power outage emergency drive (EDS) is to operate the battery-backed spare inverter to ensure continued operation of the elevator when the power supply is suddenly interrupted. The inverter has the advantages of small size, light weight, high efficiency and low noise due to the simple structure of the circuit due to the high power transistor, self-turn-off capability without additional auxiliary commutation circuit and small saturation voltage drop advantage. First, the EDS structure Figure 1 shows the EDS structure block diagram. For three-phase AC input power after the blackout, the main circuit voltage dropped to 50% before the moment, the car can continue to run. EDS system here to change the battery DC power supply, through the emergency drive control circuit and transistor inverter, the main circuit power supply. According to the out of phase monitoring part of the blackout, the use of computer