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

Claim 17:
18. A pump system, comprising:
a pump head configured to pump a fluid through a tube;
a motor configured to drive the pump head;
a flow sensor configured to measure a flow rate of the fluid in the tube downstream from the pump head; and
a pump controller configured to:
determine a targeted motor speed for a flow rate set point based on a flow rate function;
control the motor 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.