摘要
目前起重机的起升电机都采用闭环矢量控制,具有定位精度高,机械特性硬,动态响应快,起动力矩大等优点,但这必须安装轴编码器采集电机的转速信号,在很多老式门座机改造的现场,加装轴编码器困难很大,无法实现闭环矢量控制。然而英威腾CHV190系列起重提升专用变频器采用开环矢量控制,也能实现门座机平稳起制动,确保良好控制不溜钩。本文就是一个CHV190在固定式门座机开环矢量控制改造的实例。
Recently crane electric system adopt close-loop vector control mostly in lifting motor, that bring good mechanical properties, fast dynamic response and high start torque. All of these depend on shaft encoder collecting speed signal from motor, and there are so many problems for the shaft encoder＇ s installation in most of the alteration projects with old portal crane electric system. However, INVT CHV 190 series frequency converter could also realize smooth and steady control for portal crane motor by open-loop vector control, make sure no downwards sliding before starting, this article describes a successful using of open-loop vector control in fixed portal crane alteration projects by CHVI90.
出处
《电源世界》
2011年第10期52-54,51,共4页
The World of Power Supply
