CHV190開環(huán)矢量控制在固定式門座起重機上的應用

摘要：目前起重機的起升電機都采用閉環(huán)矢量控制，具有定位精度高，機械特性硬，動態(tài)響應快，起動力矩大等優(yōu)點，但這必須安裝軸編碼器采集電機的轉速信號，在很多老式門座機改造的現場，加裝軸編碼器困難很大，無法實現閉環(huán)矢量控制。然而英威騰CHV190系列起重提升專用變頻器采用開環(huán)矢量控制，也能實現門座機平穩(wěn)起制動，確保良好控制不溜鉤。本文就是一個CHV190在固定式門座機開環(huán)矢量控制改造的實例。 敘詞：CHV190 開關矢量控制 門座機 軸編碼器 Abstract：Recently crane electric system adopt close-loop vector control mostly in lifting motorthat 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 encoders installation in most of the alteration projects with old portal crane electric system. However, INVT CHV190 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 CHV190. Keyword：CHV190, Open-loop vector controlPortal craneShaft encoder