Speed vs. Time

Pump configurations other than pumps defined with a fixed setpoint allow the direct specification of Speed vs. Time. This is not an Inertial Model - it is possible to specify a speed change that would be unrealistic without an external force on the Motor or Pump.

Transient Data

The Speed vs. Time data must be directly defined in Transient Data. The speed of the pump will be forced to meet this data at each time step of the transient simulation, with the pump curves being adjusted every time step according to the affinity laws.

Figure 1: A Speed vs. Time transient