HA-655-4-200

HA-655-4-200

HA-655-4-200

6、采用变频器运转时，电机的起动电流、起动转矩怎样?

采用变频器运转，随著电机的加速相应提高频率和电压，起动电流被限制在150%额定电流以下(根据机种不同，为125%~200%)。用工频电源直接起动时，起动电流为6~7倍，因此，将产生机械电气上的冲击。采用变频器传动可以平滑地起动(起动时间变长)。起动电流为额定电流的1.2~1.5倍，起动转矩为70%~120%额定转矩;对于带有转矩自动增强功能的变频器，起动转矩为100%以上，可以带全负载起动。

7、V/f模式是什么意思?

频率下降时电压V也成比例下降，这个问题已在回答4说明。V与f的比例关系是考虑了电机特性而预先决定的，通常在控制器的存储装置(ROM)中存有几种特性，可以用开关或标度盘进行选择。

＆ 公司全称  ： 厦门泰尼电气有限公司
＆ 销售代表  ： 小黄
＆ 洽谈电话  ：  0592-6809319 
＆手机：18950191386
＆ 商务 QQ   ：  2917675397
＆ 传真（FAX)：  0592-6890859 （请注明，01006收）
＆ 公司地址  ：  厦门市海沧区海沧街道滨湖一里7号
＆ 公司网址  ：  www.xmtaini.com


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