Flow control

摘要

FLOW CONTROL Abstract A pumping system (10) for at least one aquatic application comprises a pump (16); a motor (24) coupled to the pump; and a controller (30) in communication with the motor, the controller determining a first motor speed, the controller obtaining a reference flow rate, the controller determining a reference power consumption based on the first motor speed and the reference flow rate, the controller determining a present power consumption, the controller calculating a difference value between the reference power consumption and the present power consumption, the controller using at least one of integral, proportional, and derivative control to generate a second motor speed based on the difference value, and the controller attempting to drive the motor at the second motor speed until reaching a steady state condition.