描述
1、针对不同电压等级、不同容量的变频器(尤其是已经内置制动单元的),制动电阻的总阻值不应小于制动单元的允许值。
2、根据常用的变频器容量范围,选购一两种阻值,功率的制动电组。
3、根据系统的转动惯量、机械系统的承受能力和为达到制动停止的斜率要求考虑能耗功率(也是制动电组瞬间的最大功率)。
3.1系统的转动惯量:如果不是被拖动,含有传动比i的各级转动惯量可以使用SolidWorks大致做出来(因为机械系统也是自己设计,设计完后已经知道电机轴上的总转动惯量)。则电机轴总惯量=电机转子惯量(电机手册上有)+((负载处惯量/i2)+传动惯量)/i1。
4、根据制动功率=K*能耗功率。可以通过串、并联的方法同时满足阻值和耗散功率的要求。例如:380V,22kW变频器,制动电组要求27Ω那么可用并联两个56Ω=28欧达到瞬时26KW的要求。
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主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
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据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
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