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17 gru 2011 · VFDs replace mechanical devices and PLCs for lead-lag pump control. When a pump is started and run across the line, it will provide maximum flow at optimal efficiency.
22 paź 2021 · Based on the difference between these two values, the required pump flow is calculated using PID control logic. Since pump flow is dependent on pump motor speed (this function is given by pump manufacturer), required flow can be achieved by adjusting a motor speed via VFD which is controlled by PLC.
17 gru 2011 · Variable frequency control of AC induction motors provides an economically sound and operationally effective solution for speed control and reduced power consumption. It can also be made responsive to signals from flow sensors, programmable controllers and other control systems.
Learn how adding a variable frequency drive (VFD) to your pump can change it from a pump that operates at one speed (single flow rate), to a pump that can operate at variable speeds (range of flow rates) without the use of a gear box or switching to a different electric motor.
Significant power savings can be achieved when using a VFD pump. A variable frequency drive is a system for controlling the rotational speed of an alternating current electric motor. It controls the frequency of the electrical power supplied to the motor.
9 gru 2021 · Variable frequency drives (VFDs) are often installed on a centrifugal pump with the intention that the drive will save energy, reduce wear, increase reliability and offer a more flexible control system.
