Patent ID: 11920581
Assignee: MASTERFLEX, LLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 18:
19. A pump controller for controlling a pump based on a pump speed and a downstream flow sensor, comprising:
a memory storing computer-executable instructions; and
at least one processor coupled to the memory and configured to execute the instructions to:
determine a targeted motor speed for a flow rate set point based on a flow rate function;
control the pump according to consecutive control cycles, wherein each control cycle includes a pump movement sub-cycle, a wait sub-cycle, and a measurement sub-cycle;
determine a measured flow rate during the measurement sub-cycle, wherein a subsequent control cycle of the consecutive control cycles is based on the measured flow rate;
determine a predicted movement time of the pump movement sub-cycle for a motor of the pump to change from a current motor speed to the targeted motor speed;
determine a predicted wait time of the wait sub-cycle between a time that the pump will reach the targeted motor speed and a time that a flow rate detected by the downstream flow sensor will reach a flow rate corresponding to the targeted motor speed; and
determine a measurement time of the measurement sub-cycle after the predicted wait time where the pump keeps a constant speed and the flow rate detected by the downstream flow sensor is stable.