Method for estimating flow through a pump and displaying that estimate
Publication Date: 2004-Nov-12
The IP.com Prior Art Database
This document describes a simple method of estimating and displaying a continuous flow readout on the display of a pump controlled by a motor controller, in particular a frequency converter. Through the use of a calibration process, where the flow through the pump is monitored over a range of operating conditions, information is gathered which is later used by the frequency converter to produce an estimate of the flow. This estimate is based on data gathered during the calibration process and on measurements directly available to the frequency converter (i.e. the frequency of operation and the power drawn). The flow estimation does not use any additional hardware (such as a flow meter) under normal operation.