ITT PumpSmart PS220, Руководство по конфигурации и эксплуатации

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PS220 Configuration & Operation Guide
PS220 206
Functions &
Features
SMARTCONTROL - Torque Based Pump Control
When changing the speed of the pump with a relatively flat head-capacity curve, a small speed change can result in
a large swing in flow. This type of system can result in un-stable flow making fixed speed motor control, as well as a
standard variable speed-controlled motor very difficult. The PumpSmart PS220 is able to increase and decrease pump
flow by changing the pump torque rather than the pump speed in its PID Process Control Functionality. Controlling
to pump torque can change a relatively flat pump performance curve into a steep, easy to control pump performance
curve. This is Smart Control.
SMARTCONTROL
By regulating to pump torque values in lieu of speed with a traditional PID controlled system, the PumpSmart PS220’s PID
control will control pump flow precisely eliminating any oscillations or “hunting”.
The use of this functionality allows for the PumpSmart PS220 to be used with any system that traditionally could not be
controlled with a “Flat Pump Curve” & “Flat System Curve”. This result of using torque is depicted in the graphic below.
The graphic above depicts how using torque changes the slope of the interaction between the Pump curve and the
System curve. This allows for the precise control mentioned above.