¥ 价格面议
¥ 价格面议
¥ 价格面议
¥ 价格面议
易卖工控网(www.ymgk.com)提供”YOKOGAWA NP53 特价销售”,产品详情:品牌/厂家:其他品牌、型号:NP53、成色:全新、货期:期货 7天内发货、保修:365天,更多产品详情就上易卖工控网。
真正的张力控制
所谓的张力控制,通俗点讲就是要能控制电机输出多大的力,即输出多少牛顿。反应到电机轴即能控制电机的输出转矩。
真正的张力控制不同于靠前后两个动力点的速度差形成张力的系统,靠速度差来调节张力的实质是对张力的PID控制,要加张力传感器。而且在大小卷启动、停止、加速、减速、停车时的调节不可能做到像真正的张力控制的效果,张力不是很稳定。肯定会影响产品的质量。
6 变频收卷对变频器性能的要求
(1)变频收卷的实质是要完成张力控制,即能控制电机的运行电流,因为三相异步电机的输出转矩T=CmφmIa,与电流成正比。并且当负载有突变时能够保证电机的机械特性曲线比较硬。所以必须用矢量变频器,而且必须要加编码器闭环控制。
(2)市场上能进行张力控制变频收卷的变频器主要有: 安川、艾默生、伦茨等。台达V+系列的变频器正在推出自己的收放卷专用的变频器,总结收放卷专用变频器的很多主要功能和参数并且加入了自己的算法,具有自己的特点,加上台达在全国的联保服务能够解决客户的后顾之忧。应该是客户不错的选择。
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