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3RW4047-1BB11西门子软起动器
3RW4047-1BB11西门子软起动器
软启动器的性能及特点
软启动器对电机电流的检测，控制输出电压按一D线性加至全压，励磁启动电流，实现电机的软启动，它具有很强的抗能力和控制能力，能避免在工作中受高电压和强电子的扰动。软启动器采用数字控制触发，在软启动中是恒电流加速，避免了对电网的冲击， 启动电流可根据现场负载的需要在30 %～70 %Ue （Ue 为额定电压） 范围内连续可调。
可以对软启动器参数进行，以Z小电流Z佳转矩，软启动器对机械方面的优点是可机械应力，电动机及附属机械使用寿命。启动时间可以根据不同的负载进行设定，对启动时间进行Z佳，在该时间范围内，电动机转速上升， 具有缺相，三相不平衡，过载，过流等电机的保护。性价比高，操作简单， 体积小，重量轻，安装调试方便， 具有可控硅过热和过电压保护。
西门子软启动器
1.软启动器技术的分类
电动机的软启动技术有磁控软启动、SCR软启动和液阻软启动等几种不同的,其中以SCR软启动应用为。其启动类型有:
(1)阶跃启动。阶跃启动是在开机时以短时间使启动电流迅速达到设定值,通过调节启动电流的设定值,可以达到快速启动的效果。
(2)脉冲冲击启动。启动一开始在极短的时间里,使晶闸管接近于全导通,然后恢复至较小导通角,进行正常的恒流软启动。适用于启动时静力矩较大的
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