Description: Difference between the command variable and the feedback variable; Name: control difference
Description: difference between the reference variable and the feedback variable; Name: control difference variable
Description: Speed that characterizes a pump in terms of its speed, flow rate per impeller eye, i.e. total flow for single-flow impeller, half flow for double-flow impeller, at the best efficiency point and head per stage at maximum impeller diameter ; Name: Specific speed